Plaid sync domain improvements (#2267)

Breaks our Plaid sync process out into more manageable classes. Notably, this moves the sync process to a distinct, 2-step flow:

1. Import stage - we first make API calls and import Plaid data to "mirror" tables
2. Processing stage - read the raw data, apply business rules, build internal domain models and sync balances

This provides several benefits:

- Plaid syncs can now be "replayed" without fetching API data again
- Mirror tables provide better audit and debugging capabilities
- Eliminates the "all or nothing" sync behavior that is currently in place, which is brittle

.github/workflows/ci.yml

@@ -77,6 +77,8 @@ jobs:
     timeout-minutes: 10
 
     env:
+      PLAID_CLIENT_ID: foo
+      PLAID_SECRET: bar
       DATABASE_URL: postgres://postgres:postgres@localhost:5432
       RAILS_ENV: test
 

app/controllers/webhooks_controller.rb

@@ -6,7 +6,7 @@ class WebhooksController < ApplicationController
     webhook_body = request.body.read
     plaid_verification_header = request.headers["Plaid-Verification"]
 
-    client = Provider::Plaid.new(Rails.application.config.plaid, region: :us)
+    client = Provider::Registry.plaid_provider_for_region(:us)
 
     client.validate_webhook!(plaid_verification_header, webhook_body)
     client.process_webhook(webhook_body)
@@ -21,7 +21,7 @@ class WebhooksController < ApplicationController
     webhook_body = request.body.read
     plaid_verification_header = request.headers["Plaid-Verification"]
 
-    client = Provider::Plaid.new(Rails.application.config.plaid_eu, region: :eu)
+    client = Provider::Registry.plaid_provider_for_region(:eu)
 
     client.validate_webhook!(plaid_verification_header, webhook_body)
     client.process_webhook(webhook_body)

app/models/concerns/enrichable.rb

@@ -27,14 +27,23 @@ module Enrichable
     enrich_attributes({ attr => value }, source:, metadata:)
   end
 
-  # Enriches all attributes that haven't been locked yet
+  # Enriches and logs all attributes that:
+  # - Are not locked
+  # - Are not ignored
+  # - Have changed value from the last saved value
   def enrich_attributes(attrs, source:, metadata: {})
-    enrichable_attrs = Array(attrs).reject { |k, _v| locked?(k) }
+    enrichable_attrs = Array(attrs).reject do |attr_key, attr_value|
+      locked?(attr_key) || ignored_enrichable_attributes.include?(attr_key) || self[attr_key.to_s] == attr_value
+    end
 
     ActiveRecord::Base.transaction do
       enrichable_attrs.each do |attr, value|
         self.send("#{attr}=", value)
-        log_enrichment(attribute_name: attr, attribute_value: value, source: source, metadata: metadata)
+
+        # If it's a new record, this isn't technically an "enrichment".  No logging necessary.
+        unless self.new_record?
+          log_enrichment(attribute_name: attr, attribute_value: value, source: source, metadata: metadata)
+        end
       end
 
       save

app/models/credit_card.rb

@@ -1,6 +1,10 @@
 class CreditCard < ApplicationRecord
   include Accountable
 
+  SUBTYPES = {
+    "credit_card" => { short: "Credit Card", long: "Credit Card" }
+  }.freeze
+
   class << self
     def color
       "#F13636"

app/models/depository.rb

@@ -3,7 +3,10 @@ class Depository < ApplicationRecord
 
   SUBTYPES = {
     "checking" => { short: "Checking", long: "Checking" },
-    "savings" => { short: "Savings", long: "Savings" }
+    "savings" => { short: "Savings", long: "Savings" },
+    "hsa" => { short: "HSA", long: "Health Savings Account" },
+    "cd" => { short: "CD", long: "Certificate of Deposit" },
+    "money_market" => { short: "MM", long: "Money Market" }
   }.freeze
 
   class << self

app/models/entry.rb

@@ -56,6 +56,10 @@ class Entry < ApplicationRecord
     Balance::TrendCalculator.new(self, entries, balances).trend
   end
 
+  def linked?
+    plaid_id.present?
+  end
+
   class << self
     def search(params)
       EntrySearch.new(params).build_query(all)

app/models/family/auto_categorizer.rb

@@ -70,8 +70,7 @@ class Family::AutoCategorizer
           amount: transaction.entry.amount.abs,
           classification: transaction.entry.classification,
           description: transaction.entry.name,
-          merchant: transaction.merchant&.name,
-          hint: transaction.plaid_category_detailed
+          merchant: transaction.merchant&.name
         }
       end
     end

app/models/family/plaid_connectable.rb

@@ -6,9 +6,7 @@ module Family::PlaidConnectable
   end
 
   def create_plaid_item!(public_token:, item_name:, region:)
-    provider = plaid_provider_for_region(region)
-
-    public_token_response = provider.exchange_public_token(public_token)
+    public_token_response = plaid(region).exchange_public_token(public_token)
 
     plaid_item = plaid_items.create!(
       name: item_name,
@@ -23,11 +21,9 @@ module Family::PlaidConnectable
   end
 
   def get_link_token(webhooks_url:, redirect_url:, accountable_type: nil, region: :us, access_token: nil)
-    return nil unless plaid_us || plaid_eu
+    return nil unless plaid(region)
 
-    provider = plaid_provider_for_region(region)
-
-    provider.get_link_token(
+    plaid(region).get_link_token(
       user_id: self.id,
       webhooks_url: webhooks_url,
       redirect_url: redirect_url,
@@ -37,15 +33,7 @@ module Family::PlaidConnectable
   end
 
   private
-    def plaid_us
-      @plaid ||= Provider::Registry.get_provider(:plaid_us)
-    end
-
-    def plaid_eu
-      @plaid_eu ||= Provider::Registry.get_provider(:plaid_eu)
-    end
-
-    def plaid_provider_for_region(region)
-      region.to_sym == :eu ? plaid_eu : plaid_us
+    def plaid(region)
+      @plaid ||= Provider::Registry.plaid_provider_for_region(region)
     end
 end

app/models/investment.rb

@@ -6,12 +6,11 @@ class Investment < ApplicationRecord
     "pension" => { short: "Pension", long: "Pension" },
     "retirement" => { short: "Retirement", long: "Retirement" },
     "401k" => { short: "401(k)", long: "401(k)" },
-    "traditional_401k" => { short: "Traditional 401(k)", long: "Traditional 401(k)" },
     "roth_401k" => { short: "Roth 401(k)", long: "Roth 401(k)" },
     "529_plan" => { short: "529 Plan", long: "529 Plan" },
     "hsa" => { short: "HSA", long: "Health Savings Account" },
     "mutual_fund" => { short: "Mutual Fund", long: "Mutual Fund" },
-    "traditional_ira" => { short: "Traditional IRA", long: "Traditional IRA" },
+    "ira" => { short: "IRA", long: "Traditional IRA" },
     "roth_ira" => { short: "Roth IRA", long: "Roth IRA" },
     "angel" => { short: "Angel", long: "Angel" }
   }.freeze

app/models/loan.rb

@@ -1,6 +1,13 @@
 class Loan < ApplicationRecord
   include Accountable
 
+  SUBTYPES = {
+    "mortgage" => { short: "Mortgage", long: "Mortgage" },
+    "student" => { short: "Student", long: "Student Loan" },
+    "auto" => { short: "Auto", long: "Auto Loan" },
+    "other" => { short: "Other", long: "Other Loan" }
+  }.freeze
+
   def monthly_payment
     return nil if term_months.nil? || interest_rate.nil? || rate_type.nil? || rate_type != "fixed"
     return Money.new(0, account.currency) if account.loan.original_balance.amount.zero? || term_months.zero?

app/models/plaid_account.rb

@@ -1,167 +1,54 @@
 class PlaidAccount < ApplicationRecord
-  TYPE_MAPPING = {
-    "depository" => Depository,
-    "credit" => CreditCard,
-    "loan" => Loan,
-    "investment" => Investment,
-    "other" => OtherAsset
-  }
-
   belongs_to :plaid_item
 
   has_one :account, dependent: :destroy
 
-  accepts_nested_attributes_for :account
+  validates :name, :plaid_type, :currency, presence: true
+  validate :has_balance
 
-  class << self
-    def find_or_create_from_plaid_data!(plaid_data, family)
-      PlaidAccount.transaction do
-        plaid_account = find_or_create_by!(plaid_id: plaid_data.account_id)
-
-        internal_account = family.accounts.find_or_initialize_by(plaid_account_id: plaid_account.id)
-
-        # Only set the name for new records or if the name is not locked
-        if internal_account.new_record? || internal_account.enrichable?(:name)
-          internal_account.name = plaid_data.name
-        end
-        internal_account.balance = plaid_data.balances.current || plaid_data.balances.available
-        internal_account.currency = plaid_data.balances.iso_currency_code
-        internal_account.accountable = TYPE_MAPPING[plaid_data.type].new
-
-        internal_account.save!
-        plaid_account.save!
-
-        plaid_account
-      end
-    end
-  end
-
-  def sync_account_data!(plaid_account_data)
-    update!(
-      current_balance: plaid_account_data.balances.current,
-      available_balance: plaid_account_data.balances.available,
-      currency: plaid_account_data.balances.iso_currency_code,
-      plaid_type: plaid_account_data.type,
-      plaid_subtype: plaid_account_data.subtype,
-      account_attributes: {
-        id: account.id,
-        # Plaid guarantees at least 1 of these
-        balance: plaid_account_data.balances.current || plaid_account_data.balances.available,
-        cash_balance: derive_plaid_cash_balance(plaid_account_data.balances)
-      }
+  def upsert_plaid_snapshot!(account_snapshot)
+    assign_attributes(
+      current_balance: account_snapshot.balances.current,
+      available_balance: account_snapshot.balances.available,
+      currency: account_snapshot.balances.iso_currency_code,
+      plaid_type: account_snapshot.type,
+      plaid_subtype: account_snapshot.subtype,
+      name: account_snapshot.name,
+      mask: account_snapshot.mask,
+      raw_payload: account_snapshot
     )
+
+    save!
   end
 
-  def sync_investments!(transactions:, holdings:, securities:)
-    PlaidInvestmentSync.new(self).sync!(transactions:, holdings:, securities:)
-  end
-
-  def sync_credit_data!(plaid_credit_data)
-    account.update!(
-      accountable_attributes: {
-        id: account.accountable_id,
-        minimum_payment: plaid_credit_data.minimum_payment_amount,
-        apr: plaid_credit_data.aprs.first&.apr_percentage
-      }
+  def upsert_plaid_transactions_snapshot!(transactions_snapshot)
+    assign_attributes(
+      raw_transactions_payload: transactions_snapshot
     )
+
+    save!
   end
 
-  def sync_mortgage_data!(plaid_mortgage_data)
-    create_initial_loan_balance(plaid_mortgage_data)
-
-    account.update!(
-      accountable_attributes: {
-        id: account.accountable_id,
-        rate_type: plaid_mortgage_data.interest_rate&.type,
-        interest_rate: plaid_mortgage_data.interest_rate&.percentage
-      }
+  def upsert_plaid_investments_snapshot!(investments_snapshot)
+    assign_attributes(
+      raw_investments_payload: investments_snapshot
     )
+
+    save!
   end
 
-  def sync_student_loan_data!(plaid_student_loan_data)
-    create_initial_loan_balance(plaid_student_loan_data)
-
-    account.update!(
-      accountable_attributes: {
-        id: account.accountable_id,
-        rate_type: "fixed",
-        interest_rate: plaid_student_loan_data.interest_rate_percentage
-      }
+  def upsert_plaid_liabilities_snapshot!(liabilities_snapshot)
+    assign_attributes(
+      raw_liabilities_payload: liabilities_snapshot
     )
-  end
 
-  def sync_transactions!(added:, modified:, removed:)
-    added.each do |plaid_txn|
-      account.entries.find_or_create_by!(plaid_id: plaid_txn.transaction_id) do |t|
-        t.name = plaid_txn.merchant_name || plaid_txn.original_description
-        t.amount = plaid_txn.amount
-        t.currency = plaid_txn.iso_currency_code
-        t.date = plaid_txn.date
-        t.entryable = Transaction.new(
-          plaid_category: plaid_txn.personal_finance_category.primary,
-          plaid_category_detailed: plaid_txn.personal_finance_category.detailed,
-          merchant: find_or_create_merchant(plaid_txn)
-        )
-      end
-    end
-
-    modified.each do |plaid_txn|
-      existing_txn = account.entries.find_by(plaid_id: plaid_txn.transaction_id)
-
-      existing_txn.update!(
-        amount: plaid_txn.amount,
-        date: plaid_txn.date,
-        entryable_attributes: {
-          plaid_category: plaid_txn.personal_finance_category.primary,
-          plaid_category_detailed: plaid_txn.personal_finance_category.detailed,
-          merchant: find_or_create_merchant(plaid_txn)
-        }
-      )
-    end
-
-    removed.each do |plaid_txn|
-      account.entries.find_by(plaid_id: plaid_txn.transaction_id)&.destroy
-    end
+    save!
   end
 
   private
-    def family
-      plaid_item.family
-    end
-
-    def create_initial_loan_balance(loan_data)
-      if loan_data.origination_principal_amount.present? && loan_data.origination_date.present?
-        account.entries.find_or_create_by!(plaid_id: loan_data.account_id) do |e|
-          e.name = "Initial Principal"
-          e.amount = loan_data.origination_principal_amount
-          e.currency = account.currency
-          e.date = loan_data.origination_date
-          e.entryable = Valuation.new
-        end
-      end
-    end
-
-    def find_or_create_merchant(plaid_txn)
-      unless plaid_txn.merchant_entity_id.present? && plaid_txn.merchant_name.present?
-        return nil
-      end
-
-      ProviderMerchant.find_or_create_by!(
-        source: "plaid",
-        name: plaid_txn.merchant_name,
-      ) do |m|
-        m.provider_merchant_id = plaid_txn.merchant_entity_id
-        m.website_url = plaid_txn.website
-        m.logo_url = plaid_txn.logo_url
-      end
-    end
-
-    def derive_plaid_cash_balance(plaid_balances)
-      if account.investment?
-        plaid_balances.available || 0
-      else
-        # For now, we will not distinguish between "cash" and "overall" balance for non-investment accounts
-        plaid_balances.current || plaid_balances.available
-      end
+    # Plaid guarantees at least one of these.  This validation is a sanity check for that guarantee.
+    def has_balance
+      return if current_balance.present? || available_balance.present?
+      errors.add(:base, "Plaid account must have either current or available balance")
     end
 end

app/models/plaid_account/importer.rb

@@ -0,0 +1,34 @@
+class PlaidAccount::Importer
+  def initialize(plaid_account, account_snapshot:)
+    @plaid_account = plaid_account
+    @account_snapshot = account_snapshot
+  end
+
+  def import
+    PlaidAccount.transaction do
+      import_account_info
+      import_transactions if account_snapshot.transactions_data.present?
+      import_investments if account_snapshot.investments_data.present?
+      import_liabilities if account_snapshot.liabilities_data.present?
+    end
+  end
+
+  private
+    attr_reader :plaid_account, :account_snapshot
+
+    def import_account_info
+      plaid_account.upsert_plaid_snapshot!(account_snapshot.account_data)
+    end
+
+    def import_transactions
+      plaid_account.upsert_plaid_transactions_snapshot!(account_snapshot.transactions_data)
+    end
+
+    def import_investments
+      plaid_account.upsert_plaid_investments_snapshot!(account_snapshot.investments_data)
+    end
+
+    def import_liabilities
+      plaid_account.upsert_plaid_liabilities_snapshot!(account_snapshot.liabilities_data)
+    end
+end

app/models/plaid_account/investments/balance_calculator.rb

@@ -0,0 +1,71 @@
+# Plaid Investment balances have a ton of edge cases.  This processor is responsible
+# for deriving "brokerage cash" vs. "total value" based on Plaid's reported balances and holdings.
+class PlaidAccount::Investments::BalanceCalculator
+  NegativeCashBalanceError = Class.new(StandardError)
+  NegativeTotalValueError = Class.new(StandardError)
+
+  def initialize(plaid_account, security_resolver:)
+    @plaid_account = plaid_account
+    @security_resolver = security_resolver
+  end
+
+  def balance
+    total_value = total_investment_account_value
+
+    if total_value.negative?
+      Sentry.capture_exception(
+        NegativeTotalValueError.new("Total value is negative for plaid investment account"),
+        level: :warning
+      )
+    end
+
+    total_value
+  end
+
+  # Plaid considers "brokerage cash" and "cash equivalent holdings" to all be part of "cash balance"
+  #
+  # Internally, we DO NOT.  Maybe clearly distinguishes between "brokerage cash" vs. "holdings (i.e. invested cash)"
+  # For this reason, we must manually calculate the cash balance based on "total value" and "holdings value"
+  # See PlaidAccount::Investments::SecurityResolver for more details.
+  def cash_balance
+    cash_balance = calculate_investment_brokerage_cash
+
+    if cash_balance.negative?
+      Sentry.capture_exception(
+        NegativeCashBalanceError.new("Cash balance is negative for plaid investment account"),
+        level: :warning
+      )
+    end
+
+    cash_balance
+  end
+
+  private
+    attr_reader :plaid_account, :security_resolver
+
+    def holdings
+      plaid_account.raw_investments_payload["holdings"] || []
+    end
+
+    def calculate_investment_brokerage_cash
+      total_investment_account_value - true_holdings_value
+    end
+
+    # This is our source of truth.  We assume Plaid's `current_balance` reporting is 100% accurate
+    # Plaid guarantees `current_balance` AND/OR `available_balance` is always present, and based on the docs,
+    # `current_balance` should represent "total account value".
+    def total_investment_account_value
+      plaid_account.current_balance || plaid_account.available_balance
+    end
+
+    # Plaid holdings summed up, LESS "brokerage cash" holdings (that we've manually identified)
+    def true_holdings_value
+      # True holdings are holdings *less* Plaid's "pseudo-securities" (e.g. `CUR:USD` brokerage cash "holding")
+      true_holdings = holdings.reject do |h|
+        security = security_resolver.resolve(plaid_security_id: h["security_id"])
+        security.brokerage_cash?
+      end
+
+      true_holdings.sum { |h| h["quantity"] * h["institution_price"] }
+    end
+end

app/models/plaid_account/investments/holdings_processor.rb

@@ -0,0 +1,39 @@
+class PlaidAccount::Investments::HoldingsProcessor
+  def initialize(plaid_account, security_resolver:)
+    @plaid_account = plaid_account
+    @security_resolver = security_resolver
+  end
+
+  def process
+    holdings.each do |plaid_holding|
+      resolved_security_result = security_resolver.resolve(plaid_security_id: plaid_holding["security_id"])
+
+      return unless resolved_security_result.security.present?
+
+      holding = account.holdings.find_or_initialize_by(
+        security: resolved_security_result.security,
+        date: Date.current,
+        currency: plaid_holding["iso_currency_code"]
+      )
+
+      holding.assign_attributes(
+        qty: plaid_holding["quantity"],
+        price: plaid_holding["institution_price"],
+        amount: plaid_holding["quantity"] * plaid_holding["institution_price"]
+      )
+
+      holding.save!
+    end
+  end
+
+  private
+    attr_reader :plaid_account, :security_resolver
+
+    def account
+      plaid_account.account
+    end
+
+    def holdings
+      plaid_account.raw_investments_payload["holdings"] || []
+    end
+end

app/models/plaid_account/investments/security_resolver.rb

@@ -0,0 +1,93 @@
+# Resolves a Plaid security to an internal Security record, or nil
+class PlaidAccount::Investments::SecurityResolver
+  UnresolvablePlaidSecurityError = Class.new(StandardError)
+
+  def initialize(plaid_account)
+    @plaid_account = plaid_account
+    @security_cache = {}
+  end
+
+  # Resolves an internal Security record for a given Plaid security ID
+  def resolve(plaid_security_id:)
+    response = @security_cache[plaid_security_id]
+    return response if response.present?
+
+    plaid_security = get_plaid_security(plaid_security_id)
+
+    if plaid_security.nil?
+      report_unresolvable_security(plaid_security_id)
+      response = Response.new(security: nil, cash_equivalent?: false, brokerage_cash?: false)
+    elsif brokerage_cash?(plaid_security)
+      response = Response.new(security: nil, cash_equivalent?: true, brokerage_cash?: true)
+    else
+      security = Security::Resolver.new(
+        plaid_security["ticker_symbol"],
+        exchange_operating_mic: plaid_security["market_identifier_code"]
+      ).resolve
+
+      response = Response.new(
+        security: security,
+        cash_equivalent?: cash_equivalent?(plaid_security),
+        brokerage_cash?: false
+      )
+    end
+
+    @security_cache[plaid_security_id] = response
+
+    response
+  end
+
+  private
+    attr_reader :plaid_account, :security_cache
+
+    Response = Struct.new(:security, :cash_equivalent?, :brokerage_cash?, keyword_init: true)
+
+    def securities
+      plaid_account.raw_investments_payload["securities"] || []
+    end
+
+    # Tries to find security, or returns the "proxy security" (common with options contracts that have underlying securities)
+    def get_plaid_security(plaid_security_id)
+      security = securities.find { |s| s["security_id"] == plaid_security_id && s["ticker_symbol"].present? }
+
+      return security if security.present?
+
+      securities.find { |s| s["proxy_security_id"] == plaid_security_id }
+    end
+
+    def report_unresolvable_security(plaid_security_id)
+      Sentry.capture_exception(UnresolvablePlaidSecurityError.new("Could not resolve Plaid security from provided data")) do |scope|
+        scope.set_context("plaid_security", {
+          plaid_security_id: plaid_security_id
+        })
+      end
+    end
+
+    # Plaid treats "brokerage cash" differently than us.  Internally, Maybe treats "brokerage cash"
+    # as "uninvested cash" (i.e. cash that doesn't have a corresponding Security and can be withdrawn).
+    #
+    # Plaid treats everything as a "holding" with a corresponding Security.  For example, "brokerage cash" (USD)
+    # in Plaids data model would be represented as:
+    #
+    # - A Security with ticker `CUR:USD`
+    # - A holding, linked to the `CUR:USD` Security, with an institution price of $1
+    #
+    # Internally, we store brokerage cash balance as `account.cash_balance`, NOT as a holding + security.
+    # This allows us to properly build historical cash balances and holdings values separately and accurately.
+    #
+    # These help identify these "special case" securities for various calculations.
+    #
+    def known_plaid_brokerage_cash_tickers
+      [ "CUR:USD" ]
+    end
+
+    def brokerage_cash?(plaid_security)
+      return false unless plaid_security["ticker_symbol"].present?
+      known_plaid_brokerage_cash_tickers.include?(plaid_security["ticker_symbol"])
+    end
+
+    def cash_equivalent?(plaid_security)
+      return false unless plaid_security["type"].present?
+      plaid_security["type"] == "cash" || plaid_security["is_cash_equivalent"] == true
+    end
+end

app/models/plaid_account/investments/transactions_processor.rb

@@ -0,0 +1,90 @@
+class PlaidAccount::Investments::TransactionsProcessor
+  SecurityNotFoundError = Class.new(StandardError)
+
+  def initialize(plaid_account, security_resolver:)
+    @plaid_account = plaid_account
+    @security_resolver = security_resolver
+  end
+
+  def process
+    transactions.each do |transaction|
+      if cash_transaction?(transaction)
+        find_or_create_cash_entry(transaction)
+      else
+        find_or_create_trade_entry(transaction)
+      end
+    end
+  end
+
+  private
+    attr_reader :plaid_account, :security_resolver
+
+    def account
+      plaid_account.account
+    end
+
+    def cash_transaction?(transaction)
+      transaction["type"] == "cash" || transaction["type"] == "fee"
+    end
+
+    def find_or_create_trade_entry(transaction)
+      resolved_security_result = security_resolver.resolve(plaid_security_id: transaction["security_id"])
+
+      unless resolved_security_result.security.present?
+        Sentry.capture_exception(SecurityNotFoundError.new("Could not find security for plaid trade")) do |scope|
+          scope.set_tags(plaid_account_id: plaid_account.id)
+        end
+
+        return # We can't process a non-cash transaction without a security
+      end
+
+      entry = account.entries.find_or_initialize_by(plaid_id: transaction["investment_transaction_id"]) do |e|
+        e.entryable = Trade.new
+      end
+
+      entry.assign_attributes(
+        amount: transaction["quantity"] * transaction["price"],
+        currency: transaction["iso_currency_code"],
+        date: transaction["date"]
+      )
+
+      entry.trade.assign_attributes(
+        security: resolved_security_result.security,
+        qty: transaction["quantity"],
+        price: transaction["price"],
+        currency: transaction["iso_currency_code"]
+      )
+
+      entry.enrich_attribute(
+        :name,
+        transaction["name"],
+        source: "plaid"
+      )
+
+      entry.save!
+    end
+
+    def find_or_create_cash_entry(transaction)
+      entry = account.entries.find_or_initialize_by(plaid_id: transaction["investment_transaction_id"]) do |e|
+        e.entryable = Transaction.new
+      end
+
+      entry.assign_attributes(
+        amount: transaction["amount"],
+        currency: transaction["iso_currency_code"],
+        date: transaction["date"]
+      )
+
+      entry.enrich_attribute(
+        :name,
+        transaction["name"],
+        source: "plaid"
+      )
+
+      entry.save!
+    end
+
+    def transactions
+      plaid_account.raw_investments_payload["transactions"] || []
+    end
+end

app/models/plaid_account/liabilities/credit_processor.rb

@@ -0,0 +1,25 @@
+class PlaidAccount::Liabilities::CreditProcessor
+  def initialize(plaid_account)
+    @plaid_account = plaid_account
+  end
+
+  def process
+    return unless credit_data.present?
+
+    account.credit_card.update!(
+      minimum_payment: credit_data.dig("minimum_payment_amount"),
+      apr: credit_data.dig("aprs", 0, "apr_percentage")
+    )
+  end
+
+  private
+    attr_reader :plaid_account
+
+    def account
+      plaid_account.account
+    end
+
+    def credit_data
+      plaid_account.raw_liabilities_payload["credit"]
+    end
+end

app/models/plaid_account/liabilities/mortgage_processor.rb

@@ -0,0 +1,25 @@
+class PlaidAccount::Liabilities::MortgageProcessor
+  def initialize(plaid_account)
+    @plaid_account = plaid_account
+  end
+
+  def process
+    return unless mortgage_data.present?
+
+    account.loan.update!(
+      rate_type: mortgage_data.dig("interest_rate", "type"),
+      interest_rate: mortgage_data.dig("interest_rate", "percentage")
+    )
+  end
+
+  private
+    attr_reader :plaid_account
+
+    def account
+      plaid_account.account
+    end
+
+    def mortgage_data
+      plaid_account.raw_liabilities_payload["mortgage"]
+    end
+end

app/models/plaid_account/liabilities/student_loan_processor.rb

@@ -0,0 +1,50 @@
+class PlaidAccount::Liabilities::StudentLoanProcessor
+  def initialize(plaid_account)
+    @plaid_account = plaid_account
+  end
+
+  def process
+    return unless student_loan_data.present?
+
+    account.loan.update!(
+      rate_type: "fixed",
+      interest_rate: student_loan_data["interest_rate_percentage"],
+      initial_balance: student_loan_data["origination_principal_amount"],
+      term_months: term_months
+    )
+  end
+
+  private
+    attr_reader :plaid_account
+
+    def account
+      plaid_account.account
+    end
+
+    def term_months
+      return nil unless origination_date && expected_payoff_date
+
+      ((expected_payoff_date - origination_date).to_i / 30).to_i
+    end
+
+    def origination_date
+      parse_date(student_loan_data["origination_date"])
+    end
+
+    def expected_payoff_date
+      parse_date(student_loan_data["expected_payoff_date"])
+    end
+
+    def parse_date(value)
+      return value if value.is_a?(Date)
+      return nil unless value.present?
+
+      Date.parse(value.to_s)
+    rescue ArgumentError
+      nil
+    end
+
+    def student_loan_data
+      plaid_account.raw_liabilities_payload["student"]
+    end
+end

app/models/plaid_account/processor.rb

@@ -0,0 +1,99 @@
+class PlaidAccount::Processor
+  include PlaidAccount::TypeMappable
+
+  attr_reader :plaid_account
+
+  def initialize(plaid_account)
+    @plaid_account = plaid_account
+  end
+
+  # Each step represents a different Plaid API endpoint / "product"
+  #
+  # Processing the account is the first step and if it fails, we halt the entire processor
+  # Each subsequent step can fail independently, but we continue processing the rest of the steps
+  def process
+    process_account!
+    process_transactions
+    process_investments
+    process_liabilities
+  end
+
+  private
+    def family
+      plaid_account.plaid_item.family
+    end
+
+    # Shared securities reader and resolver
+    def security_resolver
+      @security_resolver ||= PlaidAccount::Investments::SecurityResolver.new(plaid_account)
+    end
+
+    def process_account!
+      PlaidAccount.transaction do
+        account = family.accounts.find_or_initialize_by(
+          plaid_account_id: plaid_account.id
+        )
+
+        # Name and subtype are the only attributes a user can override for Plaid accounts
+        account.enrich_attributes(
+          {
+            name: plaid_account.name,
+            subtype: map_subtype(plaid_account.plaid_type, plaid_account.plaid_subtype)
+          },
+          source: "plaid"
+        )
+
+        account.assign_attributes(
+          accountable: map_accountable(plaid_account.plaid_type),
+          balance: balance_calculator.balance,
+          currency: plaid_account.currency,
+          cash_balance: balance_calculator.cash_balance
+        )
+
+        account.save!
+      end
+    end
+
+    def process_transactions
+      PlaidAccount::Transactions::Processor.new(plaid_account).process
+    rescue => e
+      report_exception(e)
+    end
+
+    def process_investments
+      PlaidAccount::Investments::TransactionsProcessor.new(plaid_account, security_resolver: security_resolver).process
+      PlaidAccount::Investments::HoldingsProcessor.new(plaid_account, security_resolver: security_resolver).process
+    rescue => e
+      report_exception(e)
+    end
+
+    def process_liabilities
+      case [ plaid_account.plaid_type, plaid_account.plaid_subtype ]
+      when [ "credit", "credit card" ]
+        PlaidAccount::Liabilities::CreditProcessor.new(plaid_account).process
+      when [ "loan", "mortgage" ]
+        PlaidAccount::Liabilities::MortgageProcessor.new(plaid_account).process
+      when [ "loan", "student" ]
+        PlaidAccount::Liabilities::StudentLoanProcessor.new(plaid_account).process
+      end
+    rescue => e
+      report_exception(e)
+    end
+
+    def balance_calculator
+      if plaid_account.plaid_type == "investment"
+        @balance_calculator ||= PlaidAccount::Investments::BalanceCalculator.new(plaid_account, security_resolver: security_resolver)
+      else
+        OpenStruct.new(
+          balance: plaid_account.current_balance || plaid_account.available_balance,
+          cash_balance: plaid_account.available_balance || 0
+        )
+      end
+    end
+
+    def report_exception(error)
+      Sentry.capture_exception(error) do |scope|
+        scope.set_tags(plaid_account_id: plaid_account.id)
+      end
+    end
+end

app/models/plaid_account/transactions/category_matcher.rb

@@ -10,10 +10,10 @@
 #
 # This class is simply a FAST and CHEAP way to match categories that are high confidence.
 # Edge cases will be handled by user-defined rules.
-class Provider::Plaid::CategoryAliasMatcher
-  include Provider::Plaid::CategoryTaxonomy
+class PlaidAccount::Transactions::CategoryMatcher
+  include PlaidAccount::Transactions::CategoryTaxonomy
 
-  def initialize(user_categories)
+  def initialize(user_categories = [])
     @user_categories = user_categories
   end
 

app/models/plaid_account/transactions/category_taxonomy.rb

@@ -1,5 +1,5 @@
 # https://plaid.com/documents/transactions-personal-finance-category-taxonomy.csv
-module Provider::Plaid::CategoryTaxonomy
+module PlaidAccount::Transactions::CategoryTaxonomy
   CATEGORIES_MAP = {
     income: {
       classification: :income,

app/models/plaid_account/transactions/processor.rb

@@ -0,0 +1,60 @@
+class PlaidAccount::Transactions::Processor
+  def initialize(plaid_account)
+    @plaid_account = plaid_account
+  end
+
+  def process
+    # Each entry is processed inside a transaction, but to avoid locking up the DB when
+    # there are hundreds or thousands of transactions, we process them individually.
+    modified_transactions.each do |transaction|
+      PlaidEntry::Processor.new(
+        transaction,
+        plaid_account: plaid_account,
+        category_matcher: category_matcher
+      ).process
+    end
+
+    PlaidAccount.transaction do
+      removed_transactions.each do |transaction|
+        remove_plaid_transaction(transaction)
+      end
+    end
+  end
+
+  private
+    attr_reader :plaid_account
+
+    def category_matcher
+      @category_matcher ||= PlaidAccount::Transactions::CategoryMatcher.new(family_categories)
+    end
+
+    def family_categories
+      @family_categories ||= begin
+        if account.family.categories.none?
+          account.family.categories.bootstrap!
+        end
+
+        account.family.categories
+      end
+    end
+
+    def account
+      plaid_account.account
+    end
+
+    def remove_plaid_transaction(raw_transaction)
+      account.entries.find_by(plaid_id: raw_transaction["transaction_id"])&.destroy
+    end
+
+    # Since we find_or_create_by transactions, we don't need a distinction between added/modified
+    def modified_transactions
+      modified = plaid_account.raw_transactions_payload["modified"] || []
+      added = plaid_account.raw_transactions_payload["added"] || []
+
+      modified + added
+    end
+
+    def removed_transactions
+      plaid_account.raw_transactions_payload["removed"] || []
+    end
+end

app/models/plaid_account/type_mappable.rb

@@ -0,0 +1,77 @@
+module PlaidAccount::TypeMappable
+  extend ActiveSupport::Concern
+
+  UnknownAccountTypeError = Class.new(StandardError)
+
+  def map_accountable(plaid_type)
+    accountable_class = TYPE_MAPPING.dig(
+      plaid_type.to_sym,
+      :accountable
+    )
+
+    unless accountable_class
+      raise UnknownAccountTypeError, "Unknown account type: #{plaid_type}"
+    end
+
+    accountable_class.new
+  end
+
+  def map_subtype(plaid_type, plaid_subtype)
+    TYPE_MAPPING.dig(
+      plaid_type.to_sym,
+      :subtype_mapping,
+      plaid_subtype
+    ) || "other"
+  end
+
+  # Plaid Account Types -> Accountable Types
+  # https://plaid.com/docs/api/accounts/#account-type-schema
+  TYPE_MAPPING = {
+    depository: {
+      accountable: Depository,
+      subtype_mapping: {
+        "checking" => "checking",
+        "savings" => "savings",
+        "hsa" => "hsa",
+        "cd" => "cd",
+        "money market" => "money_market"
+      }
+    },
+    credit: {
+      accountable: CreditCard,
+      subtype_mapping: {
+        "credit card" => "credit_card"
+      }
+    },
+    loan: {
+      accountable: Loan,
+      subtype_mapping: {
+        "mortgage" => "mortgage",
+        "student" => "student",
+        "auto" => "auto",
+        "business" => "business",
+        "home equity" => "home_equity",
+        "line of credit" => "line_of_credit"
+      }
+    },
+    investment: {
+      accountable: Investment,
+      subtype_mapping: {
+        "brokerage" => "brokerage",
+        "pension" => "pension",
+        "retirement" => "retirement",
+        "401k" => "401k",
+        "roth 401k" => "roth_401k",
+        "529" => "529_plan",
+        "hsa" => "hsa",
+        "mutual fund" => "mutual_fund",
+        "roth" => "roth_ira",
+        "ira" => "ira"
+      }
+    },
+    other: {
+      accountable: OtherAsset,
+      subtype_mapping: {}
+    }
+  }
+end

app/models/plaid_entry/processor.rb

@@ -0,0 +1,95 @@
+class PlaidEntry::Processor
+  # plaid_transaction is the raw hash fetched from Plaid API and converted to JSONB
+  def initialize(plaid_transaction, plaid_account:, category_matcher:)
+    @plaid_transaction = plaid_transaction
+    @plaid_account = plaid_account
+    @category_matcher = category_matcher
+  end
+
+  def process
+    PlaidAccount.transaction do
+      entry = account.entries.find_or_initialize_by(plaid_id: plaid_id) do |e|
+        e.entryable = Transaction.new
+      end
+
+      entry.assign_attributes(
+        amount: amount,
+        currency: currency,
+        date: date
+      )
+
+      entry.enrich_attribute(
+        :name,
+        name,
+        source: "plaid"
+      )
+
+      if detailed_category
+        matched_category = category_matcher.match(detailed_category)
+
+        if matched_category
+          entry.transaction.enrich_attribute(
+            :category_id,
+            matched_category.id,
+            source: "plaid"
+          )
+        end
+      end
+
+      if merchant
+        entry.transaction.enrich_attribute(
+          :merchant_id,
+          merchant.id,
+          source: "plaid"
+        )
+      end
+    end
+  end
+
+  private
+    attr_reader :plaid_transaction, :plaid_account, :category_matcher
+
+    def account
+      plaid_account.account
+    end
+
+    def plaid_id
+      plaid_transaction["transaction_id"]
+    end
+
+    def name
+      plaid_transaction["merchant_name"] || plaid_transaction["original_description"]
+    end
+
+    def amount
+      plaid_transaction["amount"]
+    end
+
+    def currency
+      plaid_transaction["iso_currency_code"]
+    end
+
+    def date
+      plaid_transaction["date"]
+    end
+
+    def detailed_category
+      plaid_transaction.dig("personal_finance_category", "detailed")
+    end
+
+    def merchant
+      merchant_id = plaid_transaction["merchant_entity_id"]
+      merchant_name = plaid_transaction["merchant_name"]
+
+      return nil unless merchant_id.present? && merchant_name.present?
+
+      ProviderMerchant.find_or_create_by!(
+        source: "plaid",
+        name: merchant_name,
+      ) do |m|
+        m.provider_merchant_id = merchant_id
+        m.website_url = plaid_transaction["website"]
+        m.logo_url = plaid_transaction["logo_url"]
+      end
+    end
+end

app/models/plaid_investment_sync.rb

@@ -1,115 +0,0 @@
-class PlaidInvestmentSync
-  attr_reader :plaid_account
-
-  def initialize(plaid_account)
-    @plaid_account = plaid_account
-  end
-
-  def sync!(transactions: [], holdings: [], securities: [])
-    @transactions = transactions
-    @holdings = holdings
-    @securities = securities
-
-    PlaidAccount.transaction do
-      normalize_cash_balance!
-      sync_transactions!
-      sync_holdings!
-    end
-  end
-
-  private
-    attr_reader :transactions, :holdings, :securities
-
-    # Plaid considers "brokerage cash" and "cash equivalent holdings" to all be part of "cash balance"
-    # Internally, we DO NOT.
-    # Maybe clearly distinguishes between "brokerage cash" vs. "holdings (i.e. invested cash)"
-    # For this reason, we must back out cash + cash equivalent holdings from the reported cash balance to avoid double counting
-    def normalize_cash_balance!
-      excludable_cash_holdings = holdings.select do |h|
-        internal_security, plaid_security = get_security(h.security_id, securities)
-        internal_security.present? && (plaid_security&.is_cash_equivalent || plaid_security&.type == "cash")
-      end
-
-      excludable_cash_holdings_value = excludable_cash_holdings.sum { |h| h.quantity * h.institution_price }
-
-      plaid_account.account.update!(
-        cash_balance: plaid_account.account.cash_balance - excludable_cash_holdings_value
-      )
-    end
-
-    def sync_transactions!
-      transactions.each do |transaction|
-        security, plaid_security = get_security(transaction.security_id, securities)
-
-        next if security.nil? && plaid_security.nil?
-
-        if transaction.type == "cash" || plaid_security.ticker_symbol == "CUR:USD"
-          new_transaction = plaid_account.account.entries.find_or_create_by!(plaid_id: transaction.investment_transaction_id) do |t|
-            t.name = transaction.name
-            t.amount = transaction.amount
-            t.currency = transaction.iso_currency_code
-            t.date = transaction.date
-            t.entryable = Transaction.new
-          end
-        else
-          new_transaction = plaid_account.account.entries.find_or_create_by!(plaid_id: transaction.investment_transaction_id) do |t|
-            t.name = transaction.name
-            t.amount = transaction.quantity * transaction.price
-            t.currency = transaction.iso_currency_code
-            t.date = transaction.date
-            t.entryable = Trade.new(
-              security: security,
-              qty: transaction.quantity,
-              price: transaction.price,
-              currency: transaction.iso_currency_code
-            )
-          end
-        end
-      end
-    end
-
-    def sync_holdings!
-      # Update only the current day holdings.  The account sync will populate historical values based on trades.
-      holdings.each do |holding|
-        internal_security, _plaid_security = get_security(holding.security_id, securities)
-
-        next if internal_security.nil?
-
-        existing_holding = plaid_account.account.holdings.find_or_initialize_by(
-          security: internal_security,
-          date: Date.current,
-          currency: holding.iso_currency_code
-        )
-
-        existing_holding.qty = holding.quantity
-        existing_holding.price = holding.institution_price
-        existing_holding.amount = holding.quantity * holding.institution_price
-        existing_holding.save!
-      end
-    end
-
-    def get_security(plaid_security_id, securities)
-      plaid_security = securities.find { |s| s.security_id == plaid_security_id }
-
-      return [ nil, nil ] if plaid_security.nil?
-
-      plaid_security = if plaid_security.ticker_symbol.present?
-        plaid_security
-      else
-        securities.find { |s| s.security_id == plaid_security.proxy_security_id }
-      end
-
-      return [ nil, nil ] if plaid_security.nil? || plaid_security.ticker_symbol.blank?
-      return [ nil, plaid_security ] if plaid_security.ticker_symbol == "CUR:USD" # internally, we do not consider cash a security and track it separately
-
-      operating_mic = plaid_security.market_identifier_code
-
-      # Find any matching security
-      security = Security.find_or_create_by!(
-        ticker: plaid_security.ticker_symbol&.upcase,
-        exchange_operating_mic: operating_mic&.upcase
-      )
-
-      [ security, plaid_security ]
-    end
-end

app/models/plaid_item.rb

@@ -1,5 +1,5 @@
 class PlaidItem < ApplicationRecord
-  include Syncable
+  include Syncable, Provided
 
   enum :plaid_region, { us: "us", eu: "eu" }
   enum :status, { good: "good", requires_update: "requires_update" }, default: :good
@@ -43,10 +43,6 @@ class PlaidItem < ApplicationRecord
     end
   end
 
-  def build_category_alias_matcher(user_categories)
-    Provider::Plaid::CategoryAliasMatcher.new(user_categories)
-  end
-
   def destroy_later
     update!(scheduled_for_deletion: true)
     DestroyJob.perform_later(self)
@@ -60,41 +56,70 @@ class PlaidItem < ApplicationRecord
         .exists?
   end
 
-  def auto_match_categories!
-    if family.categories.none?
-      family.categories.bootstrap!
-    end
+  def import_latest_plaid_data
+    PlaidItem::Importer.new(self, plaid_provider: plaid_provider).import
+  end
 
-    alias_matcher = build_category_alias_matcher(family.categories)
-
-    accounts.each do |account|
-      matchable_transactions = account.transactions
-                                      .where(category_id: nil)
-                                      .where.not(plaid_category: nil)
-                                      .enrichable(:category_id)
-
-      matchable_transactions.each do |transaction|
-        category = alias_matcher.match(transaction.plaid_category_detailed)
-
-        if category.present?
-          # Matcher could either return a string or a Category object
-          user_category = if category.is_a?(String)
-            family.categories.find_or_create_by!(name: category)
-          else
-            category
-          end
-
-          transaction.enrich_attribute(:category_id, user_category.id, source: "plaid")
-        end
-      end
+  # Reads the fetched data and updates internal domain objects
+  # Generally, this should only be called within a "sync", but can be called
+  # manually to "re-sync" the already fetched data
+  def process_accounts
+    plaid_accounts.each do |plaid_account|
+      PlaidAccount::Processor.new(plaid_account).process
     end
   end
 
+  # Once all the data is fetched, we can schedule account syncs to calculate historical balances
+  def schedule_account_syncs(parent_sync: nil, window_start_date: nil, window_end_date: nil)
+    accounts.each do |account|
+      account.sync_later(
+        parent_sync: parent_sync,
+        window_start_date: window_start_date,
+        window_end_date: window_end_date
+      )
+    end
+  end
+
+  # Saves the raw data fetched from Plaid API for this item
+  def upsert_plaid_snapshot!(item_snapshot)
+    assign_attributes(
+      available_products: item_snapshot.available_products,
+      billed_products: item_snapshot.billed_products,
+      raw_payload: item_snapshot,
+    )
+
+    save!
+  end
+
+  # Saves the raw data fetched from Plaid API for this item's institution
+  def upsert_plaid_institution_snapshot!(institution_snapshot)
+    assign_attributes(
+      institution_id: institution_snapshot.institution_id,
+      institution_url: institution_snapshot.url,
+      institution_color: institution_snapshot.primary_color,
+      raw_institution_payload: institution_snapshot
+    )
+
+    save!
+  end
+
+  def supports_product?(product)
+    supported_products.include?(product)
+  end
+
   private
+    # Silently swallow and report error so that we don't block the user from deleting the item
     def remove_plaid_item
       plaid_provider.remove_item(access_token)
     rescue StandardError => e
-      Rails.logger.warn("Failed to remove Plaid item #{id}: #{e.message}")
+      Sentry.capture_exception(e)
+    end
+
+    # Plaid returns mutually exclusive arrays here.  If the item has made a request for a product,
+    # it is put in the billed_products array.  If it is supported, but not yet used, it goes in the
+    # available_products array.
+    def supported_products
+      available_products + billed_products
     end
 
     class PlaidConnectionLostError < StandardError; end

app/models/plaid_item/accounts_snapshot.rb

@@ -0,0 +1,79 @@
+# All Plaid data is fetched at the item-level.  This class is a simple wrapper that
+# providers a convenience method, get_account_data which scopes the item-level payload
+# to each Plaid Account
+class PlaidItem::AccountsSnapshot
+  def initialize(plaid_item, plaid_provider:)
+    @plaid_item = plaid_item
+    @plaid_provider = plaid_provider
+  end
+
+  def accounts
+    @accounts ||= plaid_provider.get_item_accounts(plaid_item.access_token).accounts
+  end
+
+  def get_account_data(account_id)
+    AccountData.new(
+      account_data: accounts.find { |a| a.account_id == account_id },
+      transactions_data: account_scoped_transactions_data(account_id),
+      investments_data: account_scoped_investments_data(account_id),
+      liabilities_data: account_scoped_liabilities_data(account_id)
+    )
+  end
+
+  private
+    attr_reader :plaid_item, :plaid_provider
+
+    TransactionsData = Data.define(:added, :modified, :removed)
+    LiabilitiesData = Data.define(:credit, :mortgage, :student)
+    InvestmentsData = Data.define(:transactions, :holdings, :securities)
+    AccountData = Data.define(:account_data, :transactions_data, :investments_data, :liabilities_data)
+
+    def account_scoped_transactions_data(account_id)
+      return nil unless transactions_data
+
+      TransactionsData.new(
+        added: transactions_data.added.select { |t| t.account_id == account_id },
+        modified: transactions_data.modified.select { |t| t.account_id == account_id },
+        removed: transactions_data.removed.select { |t| t.account_id == account_id }
+      )
+    end
+
+    def account_scoped_investments_data(account_id)
+      return nil unless investments_data
+
+      transactions = investments_data.transactions.select { |t| t.account_id == account_id }
+      holdings = investments_data.holdings.select { |h| h.account_id == account_id }
+      securities = transactions.count > 0 && holdings.count > 0 ? investments_data.securities : []
+
+      InvestmentsData.new(
+        transactions: transactions,
+        holdings: holdings,
+        securities: securities
+      )
+    end
+
+    def account_scoped_liabilities_data(account_id)
+      return nil unless liabilities_data
+
+      LiabilitiesData.new(
+        credit: liabilities_data.credit&.find { |c| c.account_id == account_id },
+        mortgage: liabilities_data.mortgage&.find { |m| m.account_id == account_id },
+        student: liabilities_data.student&.find { |s| s.account_id == account_id }
+      )
+    end
+
+    def transactions_data
+      return nil unless plaid_item.supports_product?("transactions")
+      @transactions_data ||= plaid_provider.get_transactions(plaid_item.access_token)
+    end
+
+    def investments_data
+      return nil unless plaid_item.supports_product?("investments")
+      @investments_data ||= plaid_provider.get_item_investments(plaid_item.access_token)
+    end
+
+    def liabilities_data
+      return nil unless plaid_item.supports_product?("liabilities")
+      @liabilities_data ||= plaid_provider.get_item_liabilities(plaid_item.access_token)
+    end
+end

app/models/plaid_item/importer.rb

@@ -0,0 +1,53 @@
+class PlaidItem::Importer
+  def initialize(plaid_item, plaid_provider:)
+    @plaid_item = plaid_item
+    @plaid_provider = plaid_provider
+  end
+
+  def import
+    fetch_and_import_item_data
+    fetch_and_import_accounts_data
+  rescue Plaid::ApiError => e
+    handle_plaid_error(e)
+  end
+
+  private
+    attr_reader :plaid_item, :plaid_provider
+
+    # All errors that should halt the import should be re-raised after handling
+    # These errors will propagate up to the Sync record and mark it as failed.
+    def handle_plaid_error(error)
+      error_body = JSON.parse(error.response_body)
+
+      case error_body["error_code"]
+      when "ITEM_LOGIN_REQUIRED"
+        plaid_item.update!(status: :requires_update)
+        raise error
+      else
+        raise error
+      end
+    end
+
+    def fetch_and_import_item_data
+      item_data = plaid_provider.get_item(plaid_item.access_token).item
+      institution_data = plaid_provider.get_institution(item_data.institution_id).institution
+
+      plaid_item.upsert_plaid_snapshot!(item_data)
+      plaid_item.upsert_plaid_institution_snapshot!(institution_data)
+    end
+
+    def fetch_and_import_accounts_data
+      snapshot = PlaidItem::AccountsSnapshot.new(plaid_item, plaid_provider: plaid_provider)
+
+      snapshot.accounts.each do |raw_account|
+        plaid_account = plaid_item.plaid_accounts.find_or_initialize_by(
+          plaid_id: raw_account.account_id
+        )
+
+        PlaidAccount::Importer.new(
+          plaid_account,
+          account_snapshot: snapshot.get_account_data(raw_account.account_id)
+        ).import
+      end
+    end
+end

app/models/plaid_item/provided.rb

@@ -0,0 +1,7 @@
+module PlaidItem::Provided
+  extend ActiveSupport::Concern
+
+  def plaid_provider
+    @plaid_provider ||= Provider::Registry.plaid_provider_for_region(self.plaid_region)
+  end
+end

app/models/plaid_item/syncer.rb

@@ -6,144 +6,21 @@ class PlaidItem::Syncer
   end
 
   def perform_sync(sync)
-    begin
-      Rails.logger.info("Fetching and loading Plaid data")
-      fetch_and_load_plaid_data
-      plaid_item.update!(status: :good) if plaid_item.requires_update?
+    # Loads item metadata, accounts, transactions, and other data to our DB
+    plaid_item.import_latest_plaid_data
 
-      plaid_item.accounts.each do |account|
-        account.sync_later(parent_sync: sync, window_start_date: sync.window_start_date, window_end_date: sync.window_end_date)
-      end
+    # Processes the raw Plaid data and updates internal domain objects
+    plaid_item.process_accounts
 
-      Rails.logger.info("Plaid data fetched and loaded")
-    rescue Plaid::ApiError => e
-      handle_plaid_error(e)
-      raise e
-    end
+    # All data is synced, so we can now run an account sync to calculate historical balances and more
+    plaid_item.schedule_account_syncs(
+      parent_sync: sync,
+      window_start_date: sync.window_start_date,
+      window_end_date: sync.window_end_date
+    )
   end
 
   def perform_post_sync
-    plaid_item.auto_match_categories!
+    # no-op
   end
-
-  private
-    def plaid
-      plaid_item.plaid_region == "eu" ? plaid_eu : plaid_us
-    end
-
-    def plaid_eu
-      @plaid_eu ||= Provider::Registry.get_provider(:plaid_eu)
-    end
-
-    def plaid_us
-      @plaid_us ||= Provider::Registry.get_provider(:plaid_us)
-    end
-
-    def safe_fetch_plaid_data(method)
-      begin
-        plaid.send(method, plaid_item)
-      rescue Plaid::ApiError => e
-        Rails.logger.warn("Error fetching #{method} for item #{plaid_item.id}: #{e.message}")
-        nil
-      end
-    end
-
-    def handle_plaid_error(error)
-      error_body = JSON.parse(error.response_body)
-
-      if error_body["error_code"] == "ITEM_LOGIN_REQUIRED"
-        plaid_item.update!(status: :requires_update)
-      end
-    end
-
-    def fetch_and_load_plaid_data
-      data = {}
-
-      # Log what we're about to fetch
-      Rails.logger.info "Starting Plaid data fetch (accounts, transactions, investments, liabilities)"
-
-      item = plaid.get_item(plaid_item.access_token).item
-      plaid_item.update!(available_products: item.available_products, billed_products: item.billed_products)
-
-      # Institution details
-      if item.institution_id.present?
-        begin
-          Rails.logger.info "Fetching Plaid institution details for #{item.institution_id}"
-          institution = plaid.get_institution(item.institution_id)
-          plaid_item.update!(
-            institution_id: item.institution_id,
-            institution_url: institution.institution.url,
-            institution_color: institution.institution.primary_color
-          )
-        rescue Plaid::ApiError => e
-          Rails.logger.warn "Failed to fetch Plaid institution details: #{e.message}"
-        end
-      end
-
-      # Accounts
-      fetched_accounts = plaid.get_item_accounts(plaid_item).accounts
-      data[:accounts] = fetched_accounts || []
-      Rails.logger.info "Processing Plaid accounts (count: #{fetched_accounts.size})"
-
-      internal_plaid_accounts = fetched_accounts.map do |account|
-        internal_plaid_account = plaid_item.plaid_accounts.find_or_create_from_plaid_data!(account, plaid_item.family)
-        internal_plaid_account.sync_account_data!(account)
-        internal_plaid_account
-      end
-
-      # Transactions
-      fetched_transactions = safe_fetch_plaid_data(:get_item_transactions)
-      data[:transactions] = fetched_transactions || []
-
-      if fetched_transactions
-        Rails.logger.info "Processing Plaid transactions (added: #{fetched_transactions.added.size}, modified: #{fetched_transactions.modified.size}, removed: #{fetched_transactions.removed.size})"
-        PlaidItem.transaction do
-          internal_plaid_accounts.each do |internal_plaid_account|
-            added = fetched_transactions.added.select { |t| t.account_id == internal_plaid_account.plaid_id }
-            modified = fetched_transactions.modified.select { |t| t.account_id == internal_plaid_account.plaid_id }
-            removed = fetched_transactions.removed.select { |t| t.account_id == internal_plaid_account.plaid_id }
-
-            internal_plaid_account.sync_transactions!(added:, modified:, removed:)
-          end
-
-          plaid_item.update!(next_cursor: fetched_transactions.cursor)
-        end
-      end
-
-      # Investments
-      fetched_investments = safe_fetch_plaid_data(:get_item_investments)
-      data[:investments] = fetched_investments || []
-
-      if fetched_investments
-        Rails.logger.info "Processing Plaid investments (transactions: #{fetched_investments.transactions.size}, holdings: #{fetched_investments.holdings.size}, securities: #{fetched_investments.securities.size})"
-        PlaidItem.transaction do
-          internal_plaid_accounts.each do |internal_plaid_account|
-            transactions = fetched_investments.transactions.select { |t| t.account_id == internal_plaid_account.plaid_id }
-            holdings = fetched_investments.holdings.select { |h| h.account_id == internal_plaid_account.plaid_id }
-            securities = fetched_investments.securities
-
-            internal_plaid_account.sync_investments!(transactions:, holdings:, securities:)
-          end
-        end
-      end
-
-      # Liabilities
-      fetched_liabilities = safe_fetch_plaid_data(:get_item_liabilities)
-      data[:liabilities] = fetched_liabilities || []
-
-      if fetched_liabilities
-        Rails.logger.info "Processing Plaid liabilities (credit: #{fetched_liabilities.credit&.size || 0}, mortgage: #{fetched_liabilities.mortgage&.size || 0}, student: #{fetched_liabilities.student&.size || 0})"
-        PlaidItem.transaction do
-          internal_plaid_accounts.each do |internal_plaid_account|
-            credit = fetched_liabilities.credit&.find { |l| l.account_id == internal_plaid_account.plaid_id }
-            mortgage = fetched_liabilities.mortgage&.find { |l| l.account_id == internal_plaid_account.plaid_id }
-            student = fetched_liabilities.student&.find { |l| l.account_id == internal_plaid_account.plaid_id }
-
-            internal_plaid_account.sync_credit_data!(credit) if credit
-            internal_plaid_account.sync_mortgage_data!(mortgage) if mortgage
-            internal_plaid_account.sync_student_loan_data!(student) if student
-          end
-        end
-      end
-    end
 end

app/models/provider/plaid.rb

@@ -106,13 +106,13 @@ class Provider::Plaid
     client.item_remove(request)
   end
 
-  def get_item_accounts(item)
-    request = Plaid::AccountsGetRequest.new(access_token: item.access_token)
+  def get_item_accounts(access_token)
+    request = Plaid::AccountsGetRequest.new(access_token: access_token)
     client.accounts_get(request)
   end
 
-  def get_item_transactions(item)
-    cursor = item.next_cursor
+  def get_transactions(access_token, next_cursor: nil)
+    cursor = next_cursor
     added = []
     modified = []
     removed = []
@@ -120,7 +120,7 @@ class Provider::Plaid
 
     while has_more
       request = Plaid::TransactionsSyncRequest.new(
-        access_token: item.access_token,
+        access_token: access_token,
         cursor: cursor,
         options: {
           include_original_description: true
@@ -139,18 +139,18 @@ class Provider::Plaid
     TransactionSyncResponse.new(added:, modified:, removed:, cursor:)
   end
 
-  def get_item_investments(item, start_date: nil, end_date: Date.current)
+  def get_item_investments(access_token, start_date: nil, end_date: Date.current)
     start_date = start_date || MAX_HISTORY_DAYS.days.ago.to_date
-    holdings, holding_securities = get_item_holdings(item)
-    transactions, transaction_securities = get_item_investment_transactions(item, start_date:, end_date:)
+    holdings, holding_securities = get_item_holdings(access_token: access_token)
+    transactions, transaction_securities = get_item_investment_transactions(access_token: access_token, start_date:, end_date:)
 
     merged_securities = ((holding_securities || []) + (transaction_securities || [])).uniq { |s| s.security_id }
 
     InvestmentsResponse.new(holdings:, transactions:, securities: merged_securities)
   end
 
-  def get_item_liabilities(item)
-    request = Plaid::LiabilitiesGetRequest.new({ access_token: item.access_token })
+  def get_item_liabilities(access_token)
+    request = Plaid::LiabilitiesGetRequest.new({ access_token: access_token })
     response = client.liabilities_get(request)
     response.liabilities
   end
@@ -170,21 +170,21 @@ class Provider::Plaid
     TransactionSyncResponse = Struct.new :added, :modified, :removed, :cursor, keyword_init: true
     InvestmentsResponse = Struct.new :holdings, :transactions, :securities, keyword_init: true
 
-    def get_item_holdings(item)
-      request = Plaid::InvestmentsHoldingsGetRequest.new({ access_token: item.access_token })
+    def get_item_holdings(access_token:)
+      request = Plaid::InvestmentsHoldingsGetRequest.new({ access_token: access_token })
       response = client.investments_holdings_get(request)
 
       [ response.holdings, response.securities ]
     end
 
-    def get_item_investment_transactions(item, start_date:, end_date:)
+    def get_item_investment_transactions(access_token:, start_date:, end_date:)
       transactions = []
       securities = []
       offset = 0
 
       loop do
         request = Plaid::InvestmentsTransactionsGetRequest.new(
-          access_token: item.access_token,
+          access_token: access_token,
           start_date: start_date.to_s,
           end_date: end_date.to_s,
           options: { offset: offset }

app/models/provider/plaid_sandbox.rb

@@ -3,6 +3,19 @@ class Provider::PlaidSandbox < Provider::Plaid
 
   def initialize
     @client = create_client
+    @region = :us
+  end
+
+  def create_public_token(username: nil)
+    client.sandbox_public_token_create(
+      Plaid::SandboxPublicTokenCreateRequest.new(
+        institution_id: "ins_109508", # "First Platypus Bank" (Plaid's sandbox institution that works with all products)
+        initial_products: [ "transactions", "investments", "liabilities" ],
+        options: {
+          override_username: username || "custom_test"
+        }
+      )
+    ).public_token
   end
 
   def fire_webhook(item, type: "TRANSACTIONS", code: "SYNC_UPDATES_AVAILABLE")

app/models/provider/registry.rb

@@ -18,6 +18,10 @@ class Provider::Registry
       raise Error.new("Provider '#{name}' not found in registry")
     end
 
+    def plaid_provider_for_region(region)
+      region.to_sym == :us ? plaid_us : plaid_eu
+    end
+
     private
       def stripe
         secret_key = ENV["STRIPE_SECRET_KEY"]

app/views/shared/_money_field.html.erb

@@ -34,6 +34,7 @@
         min: options[:min] || -99999999999999,
         max: options[:max] || 99999999999999,
         step: currency.step,
+        disabled: options[:disabled],
         data: {
           "money-field-target": "amount",
           "auto-submit-form-target": ("auto" if options[:auto_submit])

app/views/trades/_header.html.erb

@@ -16,6 +16,12 @@
           <%= entry.currency %>
         </span>
       </h3>
+
+      <% if entry.linked? %>
+        <span title="Linked with Plaid">
+          <%= icon("refresh-ccw", size: "sm") %>
+        </span>
+      <% end %>
     </div>
 
     <span class="text-sm text-secondary">

app/views/trades/show.html.erb

@@ -15,20 +15,22 @@
           <%= f.date_field :date,
                 label: t(".date_label"),
                 max: Date.current,
+                disabled: @entry.linked?,
                 "data-auto-submit-form-target": "auto" %>
 
           <div class="flex items-center gap-2">
             <%= f.select :nature,
                           [["Buy", "outflow"], ["Sell", "inflow"]],
                           { container_class: "w-1/3", label: "Type", selected: @entry.amount.negative? ? "inflow" : "outflow" },
-                          { data: { "auto-submit-form-target": "auto" } } %>
+                          { data: { "auto-submit-form-target": "auto" }, disabled: @entry.linked? } %>
 
             <%= f.fields_for :entryable do |ef| %>
               <%= ef.number_field :qty,
                   label: t(".quantity_label"),
                   step: "any",
                   value: trade.qty.abs,
-                  "data-auto-submit-form-target": "auto" %>
+                  "data-auto-submit-form-target": "auto",
+                  disabled: @entry.linked? %>
             <% end %>
           </div>
 
@@ -37,7 +39,8 @@
                   label: t(".cost_per_share_label"),
                   disable_currency: true,
                   auto_submit: true,
-                  min: 0 %>
+                  min: 0,
+                  disabled: @entry.linked? %>
           <% end %>
         <% end %>
       </div>

app/views/transactions/_header.html.erb

@@ -15,6 +15,12 @@
     <% if entry.transaction.transfer? %>
       <%= icon "arrow-left-right", class: "mt-1" %>
     <% end %>
+
+    <% if entry.linked? %>
+      <span title="Linked with Plaid">
+        <%= icon("refresh-ccw", size: "sm") %>
+      </span>
+    <% end %>
   </div>
 
   <span class="text-sm text-secondary">

app/views/transactions/show.html.erb

@@ -18,6 +18,7 @@
           <%= f.date_field :date,
                 label: t(".date_label"),
                 max: Date.current,
+                disabled: @entry.linked?,
                 "data-auto-submit-form-target": "auto" %>
 
           <% unless @entry.transaction.transfer? %>
@@ -25,13 +26,15 @@
               <%= f.select :nature,
                     [["Expense", "outflow"], ["Income", "inflow"]],
                     { container_class: "w-1/3", label: t(".nature"), selected: @entry.amount.negative? ? "inflow" : "outflow" },
-                    { data: { "auto-submit-form-target": "auto" } } %>
+                    { data: { "auto-submit-form-target": "auto" }, disabled: @entry.linked? } %>
 
               <%= f.money_field :amount, label: t(".amount"),
                     container_class: "w-2/3",
                     auto_submit: true,
                     min: 0,
-                    value: @entry.amount.abs %>
+                    value: @entry.amount.abs,
+                    disabled: @entry.linked?,
+                    disable_currency: @entry.linked? %>
             </div>
 
             <%= f.fields_for :entryable do |ef| %>
@@ -66,7 +69,7 @@
             <%= f.fields_for :entryable do |ef| %>
 
               <%= ef.collection_select :merchant_id,
-                      Current.family.merchants.alphabetically,
+                    [@entry.transaction.merchant, *Current.family.merchants.alphabetically].compact,
                     :id, :name,
                     { include_blank: t(".none"),
                       label: t(".merchant_label"),

db/migrate/20250523131455_add_raw_payloads_to_plaid_accounts.rb

@@ -0,0 +1,24 @@
+class AddRawPayloadsToPlaidAccounts < ActiveRecord::Migration[7.2]
+  def change
+    add_column :plaid_items, :raw_payload, :jsonb, default: {}
+    add_column :plaid_items, :raw_institution_payload, :jsonb, default: {}
+
+    change_column_null :plaid_items, :plaid_id, false
+    add_index :plaid_items, :plaid_id, unique: true
+
+    add_column :plaid_accounts, :raw_payload, :jsonb, default: {}
+    add_column :plaid_accounts, :raw_transactions_payload, :jsonb, default: {}
+    add_column :plaid_accounts, :raw_investments_payload, :jsonb, default: {}
+    add_column :plaid_accounts, :raw_liabilities_payload, :jsonb, default: {}
+
+    change_column_null :plaid_accounts, :plaid_id, false
+    change_column_null :plaid_accounts, :plaid_type, false
+    change_column_null :plaid_accounts, :currency, false
+    change_column_null :plaid_accounts, :name, false
+    add_index :plaid_accounts, :plaid_id, unique: true
+
+    # No longer need to store on transaction model because it is stored in raw_transactions_payload
+    remove_column :transactions, :plaid_category, :string
+    remove_column :transactions, :plaid_category_detailed, :string
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.2].define(version: 2025_05_22_201031) do
+ActiveRecord::Schema[7.2].define(version: 2025_05_23_131455) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pgcrypto"
   enable_extension "plpgsql"
@@ -420,23 +420,28 @@ ActiveRecord::Schema[7.2].define(version: 2025_05_22_201031) do
 
   create_table "plaid_accounts", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
     t.uuid "plaid_item_id", null: false
-    t.string "plaid_id"
-    t.string "plaid_type"
+    t.string "plaid_id", null: false
+    t.string "plaid_type", null: false
     t.string "plaid_subtype"
     t.decimal "current_balance", precision: 19, scale: 4
     t.decimal "available_balance", precision: 19, scale: 4
-    t.string "currency"
-    t.string "name"
+    t.string "currency", null: false
+    t.string "name", null: false
     t.string "mask"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.jsonb "raw_payload", default: {}
+    t.jsonb "raw_transactions_payload", default: {}
+    t.jsonb "raw_investments_payload", default: {}
+    t.jsonb "raw_liabilities_payload", default: {}
+    t.index ["plaid_id"], name: "index_plaid_accounts_on_plaid_id", unique: true
     t.index ["plaid_item_id"], name: "index_plaid_accounts_on_plaid_item_id"
   end
 
   create_table "plaid_items", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
     t.uuid "family_id", null: false
     t.string "access_token"
-    t.string "plaid_id"
+    t.string "plaid_id", null: false
     t.string "name"
     t.string "next_cursor"
     t.boolean "scheduled_for_deletion", default: false
@@ -449,7 +454,10 @@ ActiveRecord::Schema[7.2].define(version: 2025_05_22_201031) do
     t.string "institution_id"
     t.string "institution_color"
     t.string "status", default: "good", null: false
+    t.jsonb "raw_payload", default: {}
+    t.jsonb "raw_institution_payload", default: {}
     t.index ["family_id"], name: "index_plaid_items_on_family_id"
+    t.index ["plaid_id"], name: "index_plaid_items_on_plaid_id", unique: true
   end
 
   create_table "properties", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
@@ -637,8 +645,6 @@ ActiveRecord::Schema[7.2].define(version: 2025_05_22_201031) do
     t.uuid "category_id"
     t.uuid "merchant_id"
     t.jsonb "locked_attributes", default: {}
-    t.string "plaid_category"
-    t.string "plaid_category_detailed"
     t.index ["category_id"], name: "index_transactions_on_category_id"
     t.index ["merchant_id"], name: "index_transactions_on_merchant_id"
   end

test/controllers/plaid_items_controller_test.rb

@@ -8,7 +8,7 @@ class PlaidItemsControllerTest < ActionDispatch::IntegrationTest
 
   test "create" do
     @plaid_provider = mock
-    Provider::Registry.expects(:get_provider).with(:plaid_us).returns(@plaid_provider)
+    Provider::Registry.expects(:plaid_provider_for_region).with("us").returns(@plaid_provider)
 
     public_token = "public-sandbox-1234"
 

test/fixtures/accounts.yml

@@ -24,9 +24,10 @@ depository:
 
 connected:
   family: dylan_family
-  name: Connected Account
+  name: Plaid Depository Account
   balance: 5000
   currency: USD
+  subtype: checking
   accountable_type: Depository
   accountable: two
   plaid_account: one

test/fixtures/plaid_accounts.yml

@@ -1,3 +1,9 @@
 one:
+  current_balance: 1000
+  available_balance: 1000
+  currency: USD
+  name: Plaid Depository Account
   plaid_item: one
-  plaid_id: "1234567890"
+  plaid_id: "acc_mock_1"
+  plaid_type: depository
+  plaid_subtype: checking

test/fixtures/plaid_items.yml

@@ -1,5 +1,7 @@
 one:
   family: dylan_family
-  plaid_id: "1234567890"
+  plaid_id: "item_mock_1"
   access_token: encrypted_token_1
-  name: "Test Bank"
+  name: "Test Bank"
+  billed_products: ["transactions", "investments", "liabilities"]
+  available_products: []

test/models/plaid_account/importer_test.rb

@@ -0,0 +1,35 @@
+require "test_helper"
+
+class PlaidAccount::ImporterTest < ActiveSupport::TestCase
+  setup do
+    @mock_provider = PlaidMock.new
+    @plaid_account = plaid_accounts(:one)
+    @plaid_item = @plaid_account.plaid_item
+
+    @accounts_snapshot = PlaidItem::AccountsSnapshot.new(@plaid_item, plaid_provider: @mock_provider)
+    @account_snapshot = @accounts_snapshot.get_account_data(@plaid_account.plaid_id)
+  end
+
+  test "imports account data" do
+    PlaidAccount::Importer.new(@plaid_account, account_snapshot: @account_snapshot).import
+
+    assert_equal @account_snapshot.account_data.account_id, @plaid_account.plaid_id
+    assert_equal @account_snapshot.account_data.name, @plaid_account.name
+    assert_equal @account_snapshot.account_data.mask, @plaid_account.mask
+    assert_equal @account_snapshot.account_data.type, @plaid_account.plaid_type
+    assert_equal @account_snapshot.account_data.subtype, @plaid_account.plaid_subtype
+
+    # This account has transactions data
+    assert_equal PlaidMock::TRANSACTIONS.count, @plaid_account.raw_transactions_payload["added"].count
+
+    # This account does not have investment data
+    assert_equal 0, @plaid_account.raw_investments_payload["holdings"].count
+    assert_equal 0, @plaid_account.raw_investments_payload["securities"].count
+    assert_equal 0, @plaid_account.raw_investments_payload["transactions"].count
+
+    # This account is a credit card, so it should have liability data
+    assert_equal @plaid_account.plaid_id, @plaid_account.raw_liabilities_payload["credit"]["account_id"]
+    assert_nil @plaid_account.raw_liabilities_payload["mortgage"]
+    assert_nil @plaid_account.raw_liabilities_payload["student"]
+  end
+end

test/models/plaid_account/investments/balance_calculator_test.rb

@@ -0,0 +1,83 @@
+require "test_helper"
+
+class PlaidAccount::Investments::BalanceCalculatorTest < ActiveSupport::TestCase
+  setup do
+    @plaid_account = plaid_accounts(:one)
+
+    @plaid_account.update!(
+      plaid_type: "investment",
+      current_balance: 4000,
+      available_balance: 2000 # We ignore this since we have current_balance + holdings
+    )
+  end
+
+  test "calculates total balance from cash and positions" do
+    brokerage_cash_security_id = "plaid_brokerage_cash" # Plaid's brokerage cash security
+    cash_equivalent_security_id = "plaid_cash_equivalent" # Cash equivalent security (i.e. money market fund)
+    aapl_security_id = "plaid_aapl_security" # Regular stock security
+
+    test_investments = {
+      transactions: [], # Irrelevant for balance calcs, leave empty
+      holdings: [
+        # $1,000 in brokerage cash
+        {
+          security_id: brokerage_cash_security_id,
+          cost_basis: 1000,
+          institution_price: 1,
+          institution_value: 1000,
+          quantity: 1000
+        },
+        # $1,000 in money market funds
+        {
+          security_id: cash_equivalent_security_id,
+          cost_basis: 1000,
+          institution_price: 1,
+          institution_value: 1000,
+          quantity: 1000
+        },
+        # $2,000 worth of AAPL stock
+        {
+          security_id: aapl_security_id,
+          cost_basis: 2000,
+          institution_price: 200,
+          institution_value: 2000,
+          quantity: 10
+        }
+      ],
+      securities: [
+        {
+          security_id: brokerage_cash_security_id,
+          ticker_symbol: "CUR:USD",
+          is_cash_equivalent: true,
+          type: "cash"
+        },
+        {
+          security_id: cash_equivalent_security_id,
+          ticker_symbol: "VMFXX", # Vanguard Money Market Reserves
+          is_cash_equivalent: true,
+          type: "mutual fund"
+        },
+        {
+          security_id: aapl_security_id,
+          ticker_symbol: "AAPL",
+          is_cash_equivalent: false,
+          type: "equity",
+          market_identifier_code: "XNAS"
+        }
+      ]
+    }
+
+    @plaid_account.update!(raw_investments_payload: test_investments)
+
+    security_resolver = PlaidAccount::Investments::SecurityResolver.new(@plaid_account)
+    balance_calculator = PlaidAccount::Investments::BalanceCalculator.new(@plaid_account, security_resolver: security_resolver)
+
+    # We set this equal to `current_balance`
+    assert_equal 4000, balance_calculator.balance
+
+    # This is the sum of "non-brokerage-cash-holdings".  In the above test case, this means
+    # we're summing up $2,000 of AAPL + $1,000 Vanguard MM for $3,000 in holdings value.
+    # We back this $3,000 from the $4,000 total to get $1,000 in cash balance.
+    assert_equal 1000, balance_calculator.cash_balance
+  end
+end

test/models/plaid_account/investments/holdings_processor_test.rb

@@ -0,0 +1,49 @@
+require "test_helper"
+
+class PlaidAccount::Investments::HoldingsProcessorTest < ActiveSupport::TestCase
+  setup do
+    @plaid_account = plaid_accounts(:one)
+    @security_resolver = PlaidAccount::Investments::SecurityResolver.new(@plaid_account)
+  end
+
+  test "creates holding records from Plaid holdings snapshot" do
+    test_investments_payload = {
+      securities: [], # mocked
+      holdings: [
+        {
+          "security_id" => "123",
+          "quantity" => 100,
+          "institution_price" => 100,
+          "iso_currency_code" => "USD"
+        }
+      ],
+      transactions: [] # not relevant for test
+    }
+
+    @plaid_account.update!(raw_investments_payload: test_investments_payload)
+
+    @security_resolver.expects(:resolve)
+                      .with(plaid_security_id: "123")
+                      .returns(
+                        OpenStruct.new(
+                          security: securities(:aapl),
+                          cash_equivalent?: false,
+                          brokerage_cash?: false
+                        )
+                      )
+
+    processor = PlaidAccount::Investments::HoldingsProcessor.new(@plaid_account, security_resolver: @security_resolver)
+
+    assert_difference "Holding.count" do
+      processor.process
+    end
+
+    holding = Holding.order(created_at: :desc).first
+
+    assert_equal 100, holding.qty
+    assert_equal 100, holding.price
+    assert_equal "USD", holding.currency
+    assert_equal securities(:aapl), holding.security
+    assert_equal Date.current, holding.date
+  end
+end

test/models/plaid_account/investments/security_resolver_test.rb

@@ -0,0 +1,115 @@
+require "test_helper"
+
+class PlaidAccount::Investments::SecurityResolverTest < ActiveSupport::TestCase
+  setup do
+    @upstream_resolver = mock("Security::Resolver")
+    @plaid_account = plaid_accounts(:one)
+    @resolver = PlaidAccount::Investments::SecurityResolver.new(@plaid_account)
+  end
+
+  test "handles missing plaid security" do
+    missing_id = "missing_security_id"
+
+    # Ensure there are *no* securities that reference the missing ID
+    @plaid_account.update!(raw_investments_payload: {
+      securities: [
+        {
+          "security_id" => "some_other_id",
+          "ticker_symbol" => "FOO",
+          "type" => "equity",
+          "market_identifier_code" => "XNAS"
+        }
+      ]
+    })
+
+    Security::Resolver.expects(:new).never
+    Sentry.stubs(:capture_exception)
+
+    response = @resolver.resolve(plaid_security_id: missing_id)
+
+    assert_nil response.security
+    refute response.cash_equivalent?
+    refute response.brokerage_cash?
+  end
+
+  test "identifies brokerage cash plaid securities" do
+    brokerage_cash_id = "brokerage_cash_security_id"
+
+    @plaid_account.update!(raw_investments_payload: {
+      securities: [
+        {
+          "security_id" => brokerage_cash_id,
+          "ticker_symbol" => "CUR:USD", # Plaid brokerage cash ticker
+          "type" => "cash",
+          "is_cash_equivalent" => true
+        }
+      ]
+    })
+
+    Security::Resolver.expects(:new).never
+
+    response = @resolver.resolve(plaid_security_id: brokerage_cash_id)
+
+    assert_nil response.security
+    assert response.cash_equivalent?
+    assert response.brokerage_cash?
+  end
+
+  test "identifies cash equivalent plaid securities" do
+    mmf_security_id = "money_market_security_id"
+
+    @plaid_account.update!(raw_investments_payload: {
+      securities: [
+        {
+          "security_id" => mmf_security_id,
+          "ticker_symbol" => "VMFXX", # Vanguard Federal Money Market Fund
+          "type" => "mutual fund",
+          "is_cash_equivalent" => true,
+          "market_identifier_code" => "XNAS"
+        }
+      ]
+    })
+
+    resolved_security = Security.create!(ticker: "VMFXX", exchange_operating_mic: "XNAS")
+
+    Security::Resolver.expects(:new)
+                     .with("VMFXX", exchange_operating_mic: "XNAS")
+                     .returns(@upstream_resolver)
+    @upstream_resolver.expects(:resolve).returns(resolved_security)
+
+    response = @resolver.resolve(plaid_security_id: mmf_security_id)
+
+    assert_equal resolved_security, response.security
+    assert response.cash_equivalent?
+    refute response.brokerage_cash?
+  end
+
+  test "resolves normal plaid securities" do
+    security_id = "regular_security_id"
+
+    @plaid_account.update!(raw_investments_payload: {
+      securities: [
+        {
+          "security_id" => security_id,
+          "ticker_symbol" => "IVV",
+          "type" => "etf",
+          "is_cash_equivalent" => false,
+          "market_identifier_code" => "XNAS"
+        }
+      ]
+    })
+
+    resolved_security = Security.create!(ticker: "IVV", exchange_operating_mic: "XNAS")
+
+    Security::Resolver.expects(:new)
+                     .with("IVV", exchange_operating_mic: "XNAS")
+                     .returns(@upstream_resolver)
+    @upstream_resolver.expects(:resolve).returns(resolved_security)
+
+    response = @resolver.resolve(plaid_security_id: security_id)
+
+    assert_equal resolved_security, response.security
+    refute response.cash_equivalent? # Normal securities are not cash equivalent
+    refute response.brokerage_cash?
+  end
+end

test/models/plaid_account/investments/transactions_processor_test.rb

@@ -0,0 +1,111 @@
+require "test_helper"
+
+class PlaidAccount::Investments::TransactionsProcessorTest < ActiveSupport::TestCase
+  setup do
+    @plaid_account = plaid_accounts(:one)
+    @security_resolver = PlaidAccount::Investments::SecurityResolver.new(@plaid_account)
+  end
+
+
+  test "creates regular trade entries" do
+    test_investments_payload = {
+      transactions: [
+        {
+          "transaction_id" => "123",
+          "security_id" => "123",
+          "type" => "buy",
+          "quantity" => 1, # Positive, so "buy 1 share"
+          "price" => 100,
+          "iso_currency_code" => "USD",
+          "date" => Date.current,
+          "name" => "Buy 1 share of AAPL"
+        }
+      ]
+    }
+
+    @plaid_account.update!(raw_investments_payload: test_investments_payload)
+
+    @security_resolver.stubs(:resolve).returns(OpenStruct.new(
+      security: securities(:aapl)
+    ))
+
+    processor = PlaidAccount::Investments::TransactionsProcessor.new(@plaid_account, security_resolver: @security_resolver)
+
+    assert_difference [ "Entry.count", "Trade.count" ], 1 do
+      processor.process
+    end
+
+    entry = Entry.order(created_at: :desc).first
+
+    assert_equal 100, entry.amount
+    assert_equal "USD", entry.currency
+    assert_equal Date.current, entry.date
+    assert_equal "Buy 1 share of AAPL", entry.name
+  end
+
+  test "creates cash transactions" do
+    test_investments_payload = {
+      transactions: [
+        {
+          "transaction_id" => "123",
+          "type" => "cash",
+          "subtype" => "withdrawal",
+          "amount" => 100, # Positive, so moving money OUT of the account
+          "iso_currency_code" => "USD",
+          "date" => Date.current,
+          "name" => "Withdrawal"
+        }
+      ]
+    }
+
+    @plaid_account.update!(raw_investments_payload: test_investments_payload)
+
+    @security_resolver.expects(:resolve).never # Cash transactions don't have a security
+
+    processor = PlaidAccount::Investments::TransactionsProcessor.new(@plaid_account, security_resolver: @security_resolver)
+
+    assert_difference [ "Entry.count", "Transaction.count" ], 1 do
+      processor.process
+    end
+
+    entry = Entry.order(created_at: :desc).first
+
+    assert_equal 100, entry.amount
+    assert_equal "USD", entry.currency
+    assert_equal Date.current, entry.date
+    assert_equal "Withdrawal", entry.name
+  end
+
+  test "creates fee transactions" do
+    test_investments_payload = {
+      transactions: [
+        {
+          "transaction_id" => "123",
+          "type" => "fee",
+          "subtype" => "miscellaneous fee",
+          "amount" => 10.25,
+          "iso_currency_code" => "USD",
+          "date" => Date.current,
+          "name" => "Miscellaneous fee"
+        }
+      ]
+    }
+
+    @plaid_account.update!(raw_investments_payload: test_investments_payload)
+
+    @security_resolver.expects(:resolve).never # Cash transactions don't have a security
+
+    processor = PlaidAccount::Investments::TransactionsProcessor.new(@plaid_account, security_resolver: @security_resolver)
+
+    assert_difference [ "Entry.count", "Transaction.count" ], 1 do
+      processor.process
+    end
+
+    entry = Entry.order(created_at: :desc).first
+
+    assert_equal 10.25, entry.amount
+    assert_equal "USD", entry.currency
+    assert_equal Date.current, entry.date
+    assert_equal "Miscellaneous fee", entry.name
+  end
+end

test/models/plaid_account/liabilities/credit_processor_test.rb

@@ -0,0 +1,39 @@
+require "test_helper"
+
+class PlaidAccount::Liabilities::CreditProcessorTest < ActiveSupport::TestCase
+  setup do
+    @plaid_account = plaid_accounts(:one)
+    @plaid_account.update!(
+      plaid_type: "credit",
+      plaid_subtype: "credit_card"
+    )
+
+    @plaid_account.account.update!(
+      accountable: CreditCard.new,
+    )
+  end
+
+  test "updates credit card minimum payment and APR from Plaid data" do
+    @plaid_account.update!(raw_liabilities_payload: {
+      credit: {
+        minimum_payment_amount: 100,
+        aprs: [ { apr_percentage: 15.0 } ]
+      }
+    })
+
+    processor = PlaidAccount::Liabilities::CreditProcessor.new(@plaid_account)
+    processor.process
+
+    assert_equal 100, @plaid_account.account.credit_card.minimum_payment
+    assert_equal 15.0, @plaid_account.account.credit_card.apr
+  end
+
+  test "does nothing when liability data absent" do
+    @plaid_account.update!(raw_liabilities_payload: {})
+    processor = PlaidAccount::Liabilities::CreditProcessor.new(@plaid_account)
+    processor.process
+
+    assert_nil @plaid_account.account.credit_card.minimum_payment
+    assert_nil @plaid_account.account.credit_card.apr
+  end
+end

test/models/plaid_account/liabilities/mortgage_processor_test.rb

@@ -0,0 +1,44 @@
+require "test_helper"
+
+class PlaidAccount::Liabilities::MortgageProcessorTest < ActiveSupport::TestCase
+  setup do
+    @plaid_account = plaid_accounts(:one)
+    @plaid_account.update!(
+      plaid_type: "loan",
+      plaid_subtype: "mortgage"
+    )
+
+    @plaid_account.account.update!(accountable: Loan.new)
+  end
+
+  test "updates loan interest rate and type from Plaid data" do
+    @plaid_account.update!(raw_liabilities_payload: {
+      mortgage: {
+        interest_rate: {
+          type: "fixed",
+          percentage: 4.25
+        }
+      }
+    })
+
+    processor = PlaidAccount::Liabilities::MortgageProcessor.new(@plaid_account)
+    processor.process
+
+    loan = @plaid_account.account.loan
+
+    assert_equal "fixed", loan.rate_type
+    assert_equal 4.25, loan.interest_rate
+  end
+
+  test "does nothing when mortgage data absent" do
+    @plaid_account.update!(raw_liabilities_payload: {})
+
+    processor = PlaidAccount::Liabilities::MortgageProcessor.new(@plaid_account)
+    processor.process
+
+    loan = @plaid_account.account.loan
+
+    assert_nil loan.rate_type
+    assert_nil loan.interest_rate
+  end
+end

test/models/plaid_account/liabilities/student_loan_processor_test.rb

@@ -0,0 +1,68 @@
+require "test_helper"
+
+class PlaidAccount::Liabilities::StudentLoanProcessorTest < ActiveSupport::TestCase
+  setup do
+    @plaid_account = plaid_accounts(:one)
+    @plaid_account.update!(
+      plaid_type: "loan",
+      plaid_subtype: "student"
+    )
+
+    # Change the underlying accountable to a Loan so the helper method `loan` is available
+    @plaid_account.account.update!(accountable: Loan.new)
+  end
+
+  test "updates loan details including term months from Plaid data" do
+    @plaid_account.update!(raw_liabilities_payload: {
+      student: {
+        interest_rate_percentage: 5.5,
+        origination_principal_amount: 20000,
+        origination_date: Date.new(2020, 1, 1),
+        expected_payoff_date: Date.new(2022, 1, 1)
+      }
+    })
+
+    processor = PlaidAccount::Liabilities::StudentLoanProcessor.new(@plaid_account)
+    processor.process
+
+    loan = @plaid_account.account.loan
+
+    assert_equal "fixed", loan.rate_type
+    assert_equal 5.5, loan.interest_rate
+    assert_equal 20000, loan.initial_balance
+    assert_equal 24, loan.term_months
+  end
+
+  test "handles missing payoff dates gracefully" do
+    @plaid_account.update!(raw_liabilities_payload: {
+      student: {
+        interest_rate_percentage: 4.8,
+        origination_principal_amount: 15000,
+        origination_date: Date.new(2021, 6, 1)
+        # expected_payoff_date omitted
+      }
+    })
+
+    processor = PlaidAccount::Liabilities::StudentLoanProcessor.new(@plaid_account)
+    processor.process
+
+    loan = @plaid_account.account.loan
+
+    assert_nil loan.term_months
+    assert_equal 4.8, loan.interest_rate
+    assert_equal 15000, loan.initial_balance
+  end
+
+  test "does nothing when loan data absent" do
+    @plaid_account.update!(raw_liabilities_payload: {})
+
+    processor = PlaidAccount::Liabilities::StudentLoanProcessor.new(@plaid_account)
+    processor.process
+
+    loan = @plaid_account.account.loan
+
+    assert_nil loan.interest_rate
+    assert_nil loan.initial_balance
+    assert_nil loan.term_months
+  end
+end

test/models/plaid_account/processor_test.rb

@@ -0,0 +1,172 @@
+require "test_helper"
+
+class PlaidAccount::ProcessorTest < ActiveSupport::TestCase
+  setup do
+    @plaid_account = plaid_accounts(:one)
+  end
+
+  test "processes new account and assigns attributes" do
+    Account.destroy_all # Clear out internal accounts so we start fresh
+
+    expect_default_subprocessor_calls
+
+    @plaid_account.update!(
+      plaid_id: "test_plaid_id",
+      plaid_type: "depository",
+      plaid_subtype: "checking",
+      current_balance: 1000,
+      available_balance: 1000,
+      currency: "USD",
+      name: "Test Plaid Account",
+      mask: "1234"
+    )
+
+    assert_difference "Account.count" do
+      PlaidAccount::Processor.new(@plaid_account).process
+    end
+
+    @plaid_account.reload
+
+    account = Account.order(created_at: :desc).first
+    assert_equal "Test Plaid Account", account.name
+    assert_equal @plaid_account.id, account.plaid_account_id
+    assert_equal "checking", account.subtype
+    assert_equal 1000, account.balance
+    assert_equal 1000, account.cash_balance
+    assert_equal "USD", account.currency
+    assert_equal "Depository", account.accountable_type
+    assert_equal "checking", account.subtype
+  end
+
+  test "processing is idempotent with updates and enrichments" do
+    expect_default_subprocessor_calls
+
+    assert_equal "Plaid Depository Account", @plaid_account.account.name
+    assert_equal "checking", @plaid_account.account.subtype
+
+    @plaid_account.account.update!(
+      name: "User updated name",
+      subtype: "savings",
+      balance: 2000 # User cannot override balance.  This will be overridden by the processor on next processing
+    )
+
+    @plaid_account.account.lock_attr!(:name)
+    @plaid_account.account.lock_attr!(:subtype)
+    @plaid_account.account.lock_attr!(:balance) # Even if balance somehow becomes locked, Plaid ignores it and overrides it
+
+    assert_no_difference "Account.count" do
+      PlaidAccount::Processor.new(@plaid_account).process
+    end
+
+    @plaid_account.reload
+
+    assert_equal "User updated name", @plaid_account.account.name
+    assert_equal "savings", @plaid_account.account.subtype
+    assert_equal @plaid_account.current_balance, @plaid_account.account.balance # Overriden by processor
+  end
+
+  test "account processing failure halts further processing" do
+    Account.any_instance.stubs(:save!).raises(StandardError.new("Test error"))
+
+    PlaidAccount::Transactions::Processor.any_instance.expects(:process).never
+    PlaidAccount::Investments::TransactionsProcessor.any_instance.expects(:process).never
+    PlaidAccount::Investments::HoldingsProcessor.any_instance.expects(:process).never
+
+    expect_no_investment_balance_calculator_calls
+    expect_no_liability_processor_calls
+
+    assert_raises(StandardError) do
+      PlaidAccount::Processor.new(@plaid_account).process
+    end
+  end
+
+  test "product processing failure reports exception and continues processing" do
+    PlaidAccount::Transactions::Processor.any_instance.stubs(:process).raises(StandardError.new("Test error"))
+
+    # Subsequent product processors still run
+    expect_investment_product_processor_calls
+
+    assert_nothing_raised do
+      PlaidAccount::Processor.new(@plaid_account).process
+    end
+  end
+
+  test "calculates balance using BalanceCalculator for investment accounts" do
+    @plaid_account.update!(plaid_type: "investment")
+
+    PlaidAccount::Investments::BalanceCalculator.any_instance.expects(:balance).returns(1000).once
+    PlaidAccount::Investments::BalanceCalculator.any_instance.expects(:cash_balance).returns(1000).once
+
+    PlaidAccount::Processor.new(@plaid_account).process
+  end
+
+  test "processes credit liability data" do
+    expect_investment_product_processor_calls
+    expect_no_investment_balance_calculator_calls
+    expect_depository_product_processor_calls
+
+    @plaid_account.update!(plaid_type: "credit", plaid_subtype: "credit card")
+
+    PlaidAccount::Liabilities::CreditProcessor.any_instance.expects(:process).once
+    PlaidAccount::Liabilities::MortgageProcessor.any_instance.expects(:process).never
+    PlaidAccount::Liabilities::StudentLoanProcessor.any_instance.expects(:process).never
+
+    PlaidAccount::Processor.new(@plaid_account).process
+  end
+
+  test "processes mortgage liability data" do
+    expect_investment_product_processor_calls
+    expect_no_investment_balance_calculator_calls
+    expect_depository_product_processor_calls
+
+    @plaid_account.update!(plaid_type: "loan", plaid_subtype: "mortgage")
+
+    PlaidAccount::Liabilities::CreditProcessor.any_instance.expects(:process).never
+    PlaidAccount::Liabilities::MortgageProcessor.any_instance.expects(:process).once
+    PlaidAccount::Liabilities::StudentLoanProcessor.any_instance.expects(:process).never
+
+    PlaidAccount::Processor.new(@plaid_account).process
+  end
+
+  test "processes student loan liability data" do
+    expect_investment_product_processor_calls
+    expect_no_investment_balance_calculator_calls
+    expect_depository_product_processor_calls
+
+    @plaid_account.update!(plaid_type: "loan", plaid_subtype: "student")
+
+    PlaidAccount::Liabilities::CreditProcessor.any_instance.expects(:process).never
+    PlaidAccount::Liabilities::MortgageProcessor.any_instance.expects(:process).never
+    PlaidAccount::Liabilities::StudentLoanProcessor.any_instance.expects(:process).once
+
+    PlaidAccount::Processor.new(@plaid_account).process
+  end
+
+  private
+    def expect_investment_product_processor_calls
+      PlaidAccount::Investments::TransactionsProcessor.any_instance.expects(:process).once
+      PlaidAccount::Investments::HoldingsProcessor.any_instance.expects(:process).once
+    end
+
+    def expect_depository_product_processor_calls
+      PlaidAccount::Transactions::Processor.any_instance.expects(:process).once
+    end
+
+    def expect_no_investment_balance_calculator_calls
+      PlaidAccount::Investments::BalanceCalculator.any_instance.expects(:balance).never
+      PlaidAccount::Investments::BalanceCalculator.any_instance.expects(:cash_balance).never
+    end
+
+    def expect_no_liability_processor_calls
+      PlaidAccount::Liabilities::CreditProcessor.any_instance.expects(:process).never
+      PlaidAccount::Liabilities::MortgageProcessor.any_instance.expects(:process).never
+      PlaidAccount::Liabilities::StudentLoanProcessor.any_instance.expects(:process).never
+    end
+
+    def expect_default_subprocessor_calls
+      expect_depository_product_processor_calls
+      expect_investment_product_processor_calls
+      expect_no_investment_balance_calculator_calls
+      expect_no_liability_processor_calls
+    end
+end

test/models/plaid_account/transactions/category_matcher_test.rb

@@ -1,6 +1,6 @@
 require "test_helper"
 
-class Provider::Plaid::CategoryAliasMatcherTest < ActiveSupport::TestCase
+class PlaidAccount::Transactions::CategoryMatcherTest < ActiveSupport::TestCase
   setup do
     @family = families(:empty)
 
@@ -32,7 +32,7 @@ class Provider::Plaid::CategoryAliasMatcherTest < ActiveSupport::TestCase
 
     @giving = @family.categories.create!(name: "Giving")
 
-    @matcher = Provider::Plaid::CategoryAliasMatcher.new(@family.categories)
+    @matcher = PlaidAccount::Transactions::CategoryMatcher.new(@family.categories)
   end
 
   test "matches expense categories" do

test/models/plaid_account/transactions/processor_test.rb

@@ -0,0 +1,63 @@
+require "test_helper"
+
+class PlaidAccount::Transactions::ProcessorTest < ActiveSupport::TestCase
+  setup do
+    @plaid_account = plaid_accounts(:one)
+  end
+
+  test "processes added and modified plaid transactions" do
+    added_transactions = [ { "transaction_id" => "123" } ]
+    modified_transactions = [ { "transaction_id" => "456" } ]
+
+    @plaid_account.update!(raw_transactions_payload: {
+      added: added_transactions,
+      modified: modified_transactions,
+      removed: []
+    })
+
+    mock_processor = mock("PlaidEntry::Processor")
+    category_matcher_mock = mock("PlaidAccount::Transactions::CategoryMatcher")
+
+    PlaidAccount::Transactions::CategoryMatcher.stubs(:new).returns(category_matcher_mock)
+    PlaidEntry::Processor.expects(:new)
+                         .with(added_transactions.first, plaid_account: @plaid_account, category_matcher: category_matcher_mock)
+                         .returns(mock_processor)
+                         .once
+
+    PlaidEntry::Processor.expects(:new)
+                         .with(modified_transactions.first, plaid_account: @plaid_account, category_matcher: category_matcher_mock)
+                         .returns(mock_processor)
+                         .once
+
+    mock_processor.expects(:process).twice
+
+    processor = PlaidAccount::Transactions::Processor.new(@plaid_account)
+    processor.process
+  end
+
+  test "removes transactions no longer in plaid" do
+    destroyable_transaction_id = "destroy_me"
+    @plaid_account.account.entries.create!(
+      plaid_id: destroyable_transaction_id,
+      date: Date.current,
+      amount: 100,
+      name: "Destroy me",
+      currency: "USD",
+      entryable: Transaction.new
+    )
+
+    @plaid_account.update!(raw_transactions_payload: {
+      added: [],
+      modified: [],
+      removed: [ { "transaction_id" => destroyable_transaction_id } ]
+    })
+
+    processor = PlaidAccount::Transactions::Processor.new(@plaid_account)
+
+    assert_difference [ "Entry.count", "Transaction.count" ], -1 do
+      processor.process
+    end
+
+    assert_nil Entry.find_by(plaid_id: destroyable_transaction_id)
+  end
+end

test/models/plaid_account/type_mappable_test.rb

@@ -0,0 +1,35 @@
+require "test_helper"
+
+class PlaidAccount::TypeMappableTest < ActiveSupport::TestCase
+  setup do
+    class MockProcessor
+      include PlaidAccount::TypeMappable
+    end
+
+    @mock_processor = MockProcessor.new
+  end
+
+  test "maps types to accountables" do
+    assert_instance_of Depository, @mock_processor.map_accountable("depository")
+    assert_instance_of Investment, @mock_processor.map_accountable("investment")
+    assert_instance_of CreditCard, @mock_processor.map_accountable("credit")
+    assert_instance_of Loan, @mock_processor.map_accountable("loan")
+    assert_instance_of OtherAsset, @mock_processor.map_accountable("other")
+  end
+
+  test "maps subtypes" do
+    assert_equal "checking", @mock_processor.map_subtype("depository", "checking")
+    assert_equal "roth_ira", @mock_processor.map_subtype("investment", "roth")
+  end
+
+  test "raises on invalid types" do
+    assert_raises PlaidAccount::TypeMappable::UnknownAccountTypeError do
+      @mock_processor.map_accountable("unknown")
+    end
+  end
+
+  test "handles nil subtypes" do
+    assert_equal "other", @mock_processor.map_subtype("depository", nil)
+    assert_equal "other", @mock_processor.map_subtype("depository", "unknown")
+  end
+end

test/models/plaid_entry/processor_test.rb

@@ -0,0 +1,91 @@
+require "test_helper"
+
+class PlaidEntry::ProcessorTest < ActiveSupport::TestCase
+  setup do
+    @plaid_account = plaid_accounts(:one)
+    @category_matcher = mock("PlaidAccount::Transactions::CategoryMatcher")
+  end
+
+  test "creates new entry transaction" do
+    plaid_transaction = {
+      "transaction_id" => "123",
+      "merchant_name" => "Amazon", # this is used for merchant and entry name
+      "amount" => 100,
+      "date" => Date.current,
+      "iso_currency_code" => "USD",
+      "personal_finance_category" => {
+        "detailed" => "Food"
+      },
+      "merchant_entity_id" => "123"
+    }
+
+    @category_matcher.expects(:match).with("Food").returns(categories(:food_and_drink))
+
+    processor = PlaidEntry::Processor.new(
+      plaid_transaction,
+      plaid_account: @plaid_account,
+      category_matcher: @category_matcher
+    )
+
+    assert_difference [ "Entry.count", "Transaction.count", "ProviderMerchant.count" ], 1 do
+      processor.process
+    end
+
+    entry = Entry.order(created_at: :desc).first
+
+    assert_equal 100, entry.amount
+    assert_equal "USD", entry.currency
+    assert_equal Date.current, entry.date
+    assert_equal "Amazon", entry.name
+    assert_equal categories(:food_and_drink).id, entry.transaction.category_id
+
+    provider_merchant = ProviderMerchant.order(created_at: :desc).first
+
+    assert_equal "Amazon", provider_merchant.name
+  end
+
+  test "updates existing entry transaction" do
+    existing_plaid_id = "existing_plaid_id"
+
+    plaid_transaction = {
+      "transaction_id" => existing_plaid_id,
+      "merchant_name" => "Amazon", # this is used for merchant and entry name
+      "amount" => 200, # Changed amount will be updated
+      "date" => 1.day.ago.to_date, # Changed date will be updated
+      "iso_currency_code" => "USD",
+      "personal_finance_category" => {
+        "detailed" => "Food"
+      }
+    }
+
+    @category_matcher.expects(:match).with("Food").returns(categories(:food_and_drink))
+
+    # Create an existing entry
+    @plaid_account.account.entries.create!(
+      plaid_id: existing_plaid_id,
+      amount: 100,
+      currency: "USD",
+      date: Date.current,
+      name: "Amazon",
+      entryable: Transaction.new
+    )
+
+    processor = PlaidEntry::Processor.new(
+      plaid_transaction,
+      plaid_account: @plaid_account,
+      category_matcher: @category_matcher
+    )
+
+    assert_no_difference [ "Entry.count", "Transaction.count", "ProviderMerchant.count" ] do
+      processor.process
+    end
+
+    entry = Entry.order(created_at: :desc).first
+
+    assert_equal 200, entry.amount
+    assert_equal "USD", entry.currency
+    assert_equal 1.day.ago.to_date, entry.date
+    assert_equal "Amazon", entry.name
+    assert_equal categories(:food_and_drink).id, entry.transaction.category_id
+  end
+end

test/models/plaid_investment_sync_test.rb

@@ -1,82 +0,0 @@
-require "test_helper"
-
-class PlaidInvestmentSyncTest < ActiveSupport::TestCase
-  include PlaidTestHelper
-
-  setup do
-    @plaid_account = plaid_accounts(:one)
-  end
-
-  test "syncs basic investments and handles cash holding" do
-    assert_equal 0, @plaid_account.account.entries.count
-    assert_equal 0, @plaid_account.account.holdings.count
-
-    plaid_aapl_id = "aapl_id"
-
-    transactions = [
-      create_plaid_investment_transaction({
-        investment_transaction_id: "inv_txn_1",
-        security_id: plaid_aapl_id,
-        quantity: 10,
-        price: 200,
-        date: 5.days.ago.to_date,
-        type: "buy"
-      })
-    ]
-
-    holdings = [
-      create_plaid_cash_holding,
-      create_plaid_holding({
-        security_id: plaid_aapl_id,
-        quantity: 10,
-        institution_price: 200,
-        cost_basis: 2000
-      })
-    ]
-
-    securities = [
-      create_plaid_security({
-        security_id: plaid_aapl_id,
-        close_price: 200,
-        ticker_symbol: "AAPL"
-      })
-    ]
-
-    # Cash holding should be ignored, resulting in 1, NOT 2 total holdings after sync
-    assert_difference -> { Trade.count } => 1,
-                      -> { Transaction.count } => 0,
-                      -> { Holding.count } => 1,
-                      -> { Security.count } => 0 do
-      PlaidInvestmentSync.new(@plaid_account).sync!(
-        transactions: transactions,
-        holdings: holdings,
-        securities: securities
-      )
-    end
-  end
-
-  # Some cash transactions from Plaid are labeled as type: "cash" while others are linked to a "cash" security
-  # In both cases, we should treat them as cash-only transactions (not trades)
-  test "handles cash investment transactions" do
-    transactions = [
-      create_plaid_investment_transaction({
-        price: 1,
-        quantity: 5,
-        amount: 5,
-        type: "fee",
-        subtype: "miscellaneous fee",
-        security_id: PLAID_TEST_CASH_SECURITY_ID
-      })
-    ]
-
-    assert_difference -> { Trade.count } => 0,
-                      -> { Transaction.count } => 1,
-                      -> { Security.count } => 0 do
-      PlaidInvestmentSync.new(@plaid_account).sync!(
-        transactions: transactions,
-        holdings: [ create_plaid_cash_holding ],
-        securities: [ create_plaid_cash_security ]
-      )
-    end
-  end
-end

test/models/plaid_item/importer_test.rb

@@ -0,0 +1,23 @@
+require "test_helper"
+require "ostruct"
+
+class PlaidItem::ImporterTest < ActiveSupport::TestCase
+  setup do
+    @mock_provider = PlaidMock.new
+    @plaid_item = plaid_items(:one)
+    @importer = PlaidItem::Importer.new(@plaid_item, plaid_provider: @mock_provider)
+  end
+
+  test "imports item metadata" do
+    PlaidAccount::Importer.any_instance.expects(:import).times(PlaidMock::ACCOUNTS.count)
+
+    PlaidItem::Importer.new(@plaid_item, plaid_provider: @mock_provider).import
+
+    assert_equal PlaidMock::ITEM.institution_id, @plaid_item.institution_id
+    assert_equal PlaidMock::ITEM.available_products, @plaid_item.available_products
+    assert_equal PlaidMock::ITEM.billed_products, @plaid_item.billed_products
+
+    assert_equal PlaidMock::ITEM.item_id, @plaid_item.raw_payload["item_id"]
+    assert_equal PlaidMock::INSTITUTION.institution_id, @plaid_item.raw_institution_payload["institution_id"]
+  end
+end

test/models/plaid_item_test.rb

@@ -5,11 +5,11 @@ class PlaidItemTest < ActiveSupport::TestCase
 
   setup do
     @plaid_item = @syncable = plaid_items(:one)
+    @plaid_provider = mock
+    Provider::Registry.stubs(:plaid_provider_for_region).returns(@plaid_provider)
   end
 
   test "removes plaid item when destroyed" do
-    @plaid_provider = mock
-    @plaid_item.stubs(:plaid_provider).returns(@plaid_provider)
     @plaid_provider.expects(:remove_item).with(@plaid_item.access_token).once
 
     assert_difference "PlaidItem.count", -1 do
@@ -18,8 +18,6 @@ class PlaidItemTest < ActiveSupport::TestCase
   end
 
   test "if plaid item not found, silently continues with deletion" do
-    @plaid_provider = mock
-    @plaid_item.stubs(:plaid_provider).returns(@plaid_provider)
     @plaid_provider.expects(:remove_item).with(@plaid_item.access_token).raises(Plaid::ApiError.new("Item not found"))
 
     assert_difference "PlaidItem.count", -1 do

test/models/provider/plaid_test.rb

@@ -0,0 +1,80 @@
+require "test_helper"
+
+class Provider::PlaidTest < ActiveSupport::TestCase
+  setup do
+    # Do not change, this is whitelisted in the Plaid Dashboard for local dev
+    @redirect_url = "http://localhost:3000/accounts"
+
+    # A specialization of Plaid client with sandbox-only extensions
+    @plaid = Provider::PlaidSandbox.new
+  end
+
+  test "gets link token" do
+    VCR.use_cassette("plaid/link_token") do
+      link_token = @plaid.get_link_token(
+        user_id: "test-user-id",
+        webhooks_url: "https://example.com/webhooks",
+        redirect_url: @redirect_url
+      )
+
+      assert_match /link-sandbox-.*/, link_token.link_token
+    end
+  end
+
+  test "exchanges public token" do
+    VCR.use_cassette("plaid/exchange_public_token") do
+      public_token = @plaid.create_public_token
+      exchange_response = @plaid.exchange_public_token(public_token)
+
+      assert_match /access-sandbox-.*/, exchange_response.access_token
+    end
+  end
+
+  test "gets item" do
+    VCR.use_cassette("plaid/get_item") do
+      access_token = get_access_token
+      item = @plaid.get_item(access_token).item
+
+      assert_equal "ins_109508", item.institution_id
+      assert_equal "First Platypus Bank", item.institution_name
+    end
+  end
+
+  test "gets item accounts" do
+    VCR.use_cassette("plaid/get_item_accounts") do
+      access_token = get_access_token
+      accounts_response = @plaid.get_item_accounts(access_token)
+
+      assert_equal 4, accounts_response.accounts.size
+    end
+  end
+
+  test "gets item investments" do
+    VCR.use_cassette("plaid/get_item_investments") do
+      access_token = get_access_token
+      investments_response = @plaid.get_item_investments(access_token)
+
+      assert_equal 3, investments_response.holdings.size
+      assert_equal 4, investments_response.transactions.size
+    end
+  end
+
+  test "gets item liabilities" do
+    VCR.use_cassette("plaid/get_item_liabilities") do
+      access_token = get_access_token
+      liabilities_response = @plaid.get_item_liabilities(access_token)
+
+      assert liabilities_response.credit.count > 0
+      assert liabilities_response.student.count > 0
+    end
+  end
+
+  private
+    def get_access_token
+      VCR.use_cassette("plaid/access_token") do
+        public_token = @plaid.create_public_token
+        exchange_response = @plaid.exchange_public_token(public_token)
+        exchange_response.access_token
+      end
+    end
+end

test/support/plaid_mock.rb

@@ -0,0 +1,214 @@
+require "ostruct"
+
+# Lightweight wrapper that allows Ostruct objects to properly serialize to JSON
+# for storage on PlaidItem / PlaidAccount JSONB columns
+class MockData < OpenStruct
+  def as_json(options = {})
+    @table.as_json(options)
+  end
+end
+
+# A basic Plaid provider mock that returns static payloads for testing
+class PlaidMock
+  TransactionSyncResponse = Struct.new(:added, :modified, :removed, :cursor, keyword_init: true)
+  InvestmentsResponse      = Struct.new(:holdings, :transactions, :securities, keyword_init: true)
+
+  ITEM = MockData.new(
+    item_id: "item_mock_1",
+    institution_id: "ins_mock",
+    institution_name: "Mock Institution",
+    available_products: [],
+    billed_products:     %w[transactions investments liabilities]
+  )
+
+  INSTITUTION = MockData.new(
+    institution_id: "ins_mock",
+    institution_name: "Mock Institution"
+  )
+
+  ACCOUNTS = [
+    MockData.new(
+      account_id: "acc_mock_1",
+      name:       "Mock Checking",
+      mask:       "1111",
+      type:       "depository",
+      subtype:    "checking",
+      balances:   MockData.new(
+        current:           1_000.00,
+        available:         800.00,
+        iso_currency_code: "USD"
+      )
+    ),
+    MockData.new(
+      account_id: "acc_mock_2",
+      name:       "Mock Brokerage",
+      mask:       "2222",
+      type:       "investment",
+      subtype:    "brokerage",
+      balances:   MockData.new(
+        current:           15_000.00,
+        available:         15_000.00,
+        iso_currency_code: "USD"
+      )
+    )
+  ]
+
+  SECURITIES = [
+    MockData.new(
+      security_id:             "sec_mock_1",
+      ticker_symbol:           "AAPL",
+      proxy_security_id:       nil,
+      market_identifier_code:  "XNAS",
+      type:                    "equity",
+      is_cash_equivalent:      false
+    ),
+    # Cash security representation – used to exclude cash-equivalent holdings
+    MockData.new(
+      security_id:             "sec_mock_cash",
+      ticker_symbol:           "CUR:USD",
+      proxy_security_id:       nil,
+      market_identifier_code:  nil,
+      type:                    "cash",
+      is_cash_equivalent:      true
+    )
+  ]
+
+  TRANSACTIONS = [
+    MockData.new(
+      transaction_id:            "txn_mock_1",
+      account_id:                "acc_mock_1",
+      merchant_name:             "Mock Coffee",
+      original_description:      "MOCK COFFEE SHOP",
+      amount:                    4.50,
+      iso_currency_code:         "USD",
+      date:                      Date.current.to_s,
+      personal_finance_category: OpenStruct.new(primary: "FOOD_AND_DRINK", detailed: "COFFEE_SHOP"),
+      website:                   "https://coffee.example.com",
+      logo_url:                  "https://coffee.example.com/logo.png",
+      merchant_entity_id:        "merch_mock_1"
+    )
+  ]
+
+  INVESTMENT_TRANSACTIONS = [
+    MockData.new(
+      investment_transaction_id: "inv_txn_mock_1",
+      account_id:               "acc_mock_2",
+      security_id:              "sec_mock_1",
+      type:                     "buy",
+      name:                     "BUY AAPL",
+      quantity:                 10,
+      price:                    150.00,
+      amount:                   -1_500.00,
+      iso_currency_code:        "USD",
+      date:                     Date.current.to_s
+    ),
+    MockData.new(
+      investment_transaction_id: "inv_txn_mock_cash",
+      account_id:               "acc_mock_2",
+      security_id:              "sec_mock_cash",
+      type:                     "cash",
+      name:                     "Cash Dividend",
+      quantity:                 1,
+      price:                    200.00,
+      amount:                   200.00,
+      iso_currency_code:        "USD",
+      date:                     Date.current.to_s
+    )
+  ]
+
+  HOLDINGS = [
+    MockData.new(
+      account_id:              "acc_mock_2",
+      security_id:             "sec_mock_1",
+      quantity:                10,
+      institution_price:       150.00,
+      iso_currency_code:       "USD"
+    ),
+    MockData.new(
+      account_id:              "acc_mock_2",
+      security_id:             "sec_mock_cash",
+      quantity:                200.0,
+      institution_price:       1.00,
+      iso_currency_code:       "USD"
+    )
+  ]
+
+  LIABILITIES = {
+    credit: [
+      MockData.new(
+        account_id:              "acc_mock_1",
+        minimum_payment_amount:   25.00,
+        aprs:                    [ MockData.new(apr_percentage: 19.99) ]
+      )
+    ],
+    mortgage: [
+      MockData.new(
+        account_id:                  "acc_mock_3",
+        origination_principal_amount: 250_000,
+        origination_date:             10.years.ago.to_date.to_s,
+        interest_rate:               MockData.new(type: "fixed", percentage: 3.5)
+      )
+    ],
+    student: [
+      MockData.new(
+        account_id:                  "acc_mock_4",
+        origination_principal_amount: 50_000,
+        origination_date:             6.years.ago.to_date.to_s,
+        interest_rate_percentage:    4.0
+      )
+    ]
+  }
+
+  def get_link_token(*, **)
+    MockData.new(link_token: "link-mock-123")
+  end
+
+  def create_public_token(username: nil)
+    "public-mock-#{username || 'user'}"
+  end
+
+  def exchange_public_token(_token)
+    MockData.new(access_token: "access-mock-123")
+  end
+
+  def get_item(_access_token)
+    MockData.new(
+      item: ITEM
+    )
+  end
+
+  def get_institution(institution_id)
+    MockData.new(
+      institution: INSTITUTION
+    )
+  end
+
+  def get_item_accounts(_item_or_token)
+    MockData.new(accounts: ACCOUNTS)
+  end
+
+  def get_transactions(access_token, next_cursor: nil)
+    TransactionSyncResponse.new(
+      added:    TRANSACTIONS,
+      modified: [],
+      removed:  [],
+      cursor:   "cursor-mock-1"
+    )
+  end
+
+  def get_item_investments(_item_or_token, **)
+    InvestmentsResponse.new(
+      holdings:     HOLDINGS,
+      transactions: INVESTMENT_TRANSACTIONS,
+      securities:   SECURITIES
+    )
+  end
+
+  def get_item_liabilities(_item_or_token)
+    MockData.new(
+      credit:   LIABILITIES[:credit],
+      mortgage: LIABILITIES[:mortgage],
+      student:  LIABILITIES[:student]
+    )
+  end
+end

test/support/plaid_test_helper.rb

@@ -1,128 +0,0 @@
-require "ostruct"
-
-module PlaidTestHelper
-  PLAID_TEST_ACCOUNT_ID = "plaid_test_account_id"
-  PLAID_TEST_CASH_SECURITY_ID = "plaid_test_cash_security_id"
-
-  # Special case
-  def create_plaid_cash_security(attributes = {})
-    default_attributes = {
-      close_price: nil,
-      close_price_as_of: nil,
-      cusip: nil,
-      fixed_income: nil,
-      industry: nil,
-      institution_id: nil,
-      institution_security_id: nil,
-      is_cash_equivalent: false, # Plaid sometimes returns false here (bad data), so we should not rely on it
-      isin: nil,
-      iso_currency_code: "USD",
-      market_identifier_code: nil,
-      name: "US Dollar",
-      option_contract: nil,
-      proxy_security_id: nil,
-      sector: nil,
-      security_id: PLAID_TEST_CASH_SECURITY_ID,
-      sedol: nil,
-      ticker_symbol: "CUR:USD",
-      type: "cash",
-      unofficial_currency_code: nil,
-      update_datetime: nil
-    }
-
-    OpenStruct.new(
-      default_attributes.merge(attributes)
-    )
-  end
-
-  def create_plaid_security(attributes = {})
-    default_attributes = {
-      close_price: 606.71,
-      close_price_as_of: Date.current,
-      cusip: nil,
-      fixed_income: nil,
-      industry: "Mutual Funds",
-      institution_id: nil,
-      institution_security_id: nil,
-      is_cash_equivalent: false,
-      isin: nil,
-      iso_currency_code: "USD",
-      market_identifier_code: "XNAS",
-      name: "iShares S&P 500 Index",
-      option_contract: nil,
-      proxy_security_id: nil,
-      sector: "Financial",
-      security_id: "plaid_test_security_id",
-      sedol: "2593025",
-      ticker_symbol: "IVV",
-      type: "etf",
-      unofficial_currency_code: nil,
-      update_datetime: nil
-    }
-
-    OpenStruct.new(
-      default_attributes.merge(attributes)
-    )
-  end
-
-  def create_plaid_cash_holding(attributes = {})
-    default_attributes = {
-      account_id: PLAID_TEST_ACCOUNT_ID,
-      cost_basis: 1000,
-      institution_price: 1,
-      institution_price_as_of: Date.current,
-      iso_currency_code: "USD",
-      quantity: 1000,
-      security_id: PLAID_TEST_CASH_SECURITY_ID,
-      unofficial_currency_code: nil,
-      vested_quantity: nil,
-      vested_value: nil
-    }
-
-    OpenStruct.new(
-      default_attributes.merge(attributes)
-    )
-  end
-
-  def create_plaid_holding(attributes = {})
-    default_attributes = {
-      account_id: PLAID_TEST_ACCOUNT_ID,
-      cost_basis: 2000,
-      institution_price: 200,
-      institution_price_as_of: Date.current,
-      iso_currency_code: "USD",
-      quantity: 10,
-      security_id: "plaid_test_security_id",
-      unofficial_currency_code: nil,
-      vested_quantity: nil,
-      vested_value: nil
-    }
-
-    OpenStruct.new(
-      default_attributes.merge(attributes)
-    )
-  end
-
-  def create_plaid_investment_transaction(attributes = {})
-    default_attributes = {
-      account_id: PLAID_TEST_ACCOUNT_ID,
-      amount: 500,
-      cancel_transaction_id: nil,
-      date: 5.days.ago.to_date,
-      fees: 0,
-      investment_transaction_id: "plaid_test_investment_transaction_id",
-      iso_currency_code: "USD",
-      name: "Buy 100 shares of IVV",
-      price: 606.71,
-      quantity: 100,
-      security_id: "plaid_test_security_id",
-      type: "buy",
-      subtype: "buy",
-      unofficial_currency_code: nil
-    }
-
-    OpenStruct.new(
-      default_attributes.merge(attributes)
-    )
-  end
-end

test/test_helper.rb

@@ -29,6 +29,8 @@ VCR.configure do |config|
   config.filter_sensitive_data("<OPENAI_ORGANIZATION_ID>") { ENV["OPENAI_ORGANIZATION_ID"] }
   config.filter_sensitive_data("<STRIPE_SECRET_KEY>") { ENV["STRIPE_SECRET_KEY"] }
   config.filter_sensitive_data("<STRIPE_WEBHOOK_SECRET>") { ENV["STRIPE_WEBHOOK_SECRET"] }
+  config.filter_sensitive_data("<PLAID_CLIENT_ID>") { ENV["PLAID_CLIENT_ID"] }
+  config.filter_sensitive_data("<PLAID_SECRET>") { ENV["PLAID_SECRET"] }
 end
 
 module ActiveSupport

test/vcr_cassettes/plaid/access_token.yml

@@ -0,0 +1,124 @@
+---
+http_interactions:
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/sandbox/public_token/create
+    body:
+      encoding: UTF-8
+      string: '{"institution_id":"ins_109508","initial_products":["transactions","investments","liabilities"],"options":{"override_username":"custom_test"}}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:03 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '110'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '2892'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "public_token": "public-sandbox-0463cb9d-8bdb-4e01-9b33-243e1370623c",
+          "request_id": "FaSopSLAyHsZM9O"
+        }
+  recorded_at: Mon, 19 May 2025 17:24:03 GMT
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/item/public_token/exchange
+    body:
+      encoding: UTF-8
+      string: '{"public_token":"public-sandbox-0463cb9d-8bdb-4e01-9b33-243e1370623c"}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:03 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '164'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '171'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "access_token": "access-sandbox-0af2c971-41a6-4fc5-a97d-f2b27ab0a648",
+          "item_id": "n7XKpjRmDkHENymaBw7rU71wxQnrW4i6DDrQP",
+          "request_id": "2e1nOnm2CoOXVcH"
+        }
+  recorded_at: Mon, 19 May 2025 17:24:03 GMT
+recorded_with: VCR 6.3.1

test/vcr_cassettes/plaid/exchange_public_token.yml

@@ -0,0 +1,124 @@
+---
+http_interactions:
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/sandbox/public_token/create
+    body:
+      encoding: UTF-8
+      string: '{"institution_id":"ins_109508","initial_products":["transactions","investments","liabilities"],"options":{"override_username":"custom_test"}}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:09 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '110'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '3086'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "public_token": "public-sandbox-29a5644f-001d-4bf5-abae-d26ecf8ee211",
+          "request_id": "6dz2Xo7zoyT9W9R"
+        }
+  recorded_at: Mon, 19 May 2025 17:24:09 GMT
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/item/public_token/exchange
+    body:
+      encoding: UTF-8
+      string: '{"public_token":"public-sandbox-29a5644f-001d-4bf5-abae-d26ecf8ee211"}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:09 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '164'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '152'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "access_token": "access-sandbox-fb7bb5da-e3e2-464e-8644-4eeafbf6541f",
+          "item_id": "bd9d3lAbjqhWyRz7bl61s9R7npPJ87HVzAyvn",
+          "request_id": "GqA99rziFZduKYg"
+        }
+  recorded_at: Mon, 19 May 2025 17:24:09 GMT
+recorded_with: VCR 6.3.1

test/vcr_cassettes/plaid/get_item.yml

@@ -0,0 +1,106 @@
+---
+http_interactions:
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/item/get
+    body:
+      encoding: UTF-8
+      string: '{"access_token":"access-sandbox-0af2c971-41a6-4fc5-a97d-f2b27ab0a648"}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:03 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '1050'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '157'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "item": {
+            "available_products": [
+              "assets",
+              "auth",
+              "balance",
+              "credit_details",
+              "identity",
+              "identity_match",
+              "income",
+              "income_verification",
+              "recurring_transactions",
+              "signal",
+              "statements"
+            ],
+            "billed_products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "consent_expiration_time": null,
+            "created_at": "2025-05-19T17:24:00Z",
+            "error": null,
+            "institution_id": "ins_109508",
+            "institution_name": "First Platypus Bank",
+            "item_id": "n7XKpjRmDkHENymaBw7rU71wxQnrW4i6DDrQP",
+            "products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "update_type": "background",
+            "webhook": ""
+          },
+          "request_id": "dpcY8geAZ93oxJm",
+          "status": {
+            "investments": {
+              "last_failed_update": null,
+              "last_successful_update": "2025-05-19T17:24:01.861Z"
+            },
+            "last_webhook": null,
+            "transactions": {
+              "last_failed_update": null,
+              "last_successful_update": null
+            }
+          }
+        }
+  recorded_at: Mon, 19 May 2025 17:24:03 GMT
+recorded_with: VCR 6.3.1

test/vcr_cassettes/plaid/get_item_accounts.yml

@@ -0,0 +1,160 @@
+---
+http_interactions:
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/accounts/get
+    body:
+      encoding: UTF-8
+      string: '{"access_token":"access-sandbox-0af2c971-41a6-4fc5-a97d-f2b27ab0a648"}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:04 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '2578'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '191'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "accounts": [
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "balances": {
+                "available": 8000,
+                "current": 10000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "1122",
+              "name": "Test Brokerage Account",
+              "official_name": "Plaid brokerage",
+              "subtype": "brokerage",
+              "type": "investment"
+            },
+            {
+              "account_id": "RperV9wJMNiDWKljGMkPCkwDGJb7q7FaNlVMp",
+              "balances": {
+                "available": 9372.38,
+                "current": 1000,
+                "iso_currency_code": "USD",
+                "limit": 10500,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "1219",
+              "name": "Test Credit Card Account",
+              "official_name": "Plaid credit card",
+              "subtype": "credit card",
+              "type": "credit"
+            },
+            {
+              "account_id": "9mvxVZRW7LUD67QbEBm1CPZ6XlqkmkF4oGNBo",
+              "balances": {
+                "available": 10000,
+                "current": 10000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "4243",
+              "name": "Test Depository Account",
+              "official_name": "Plaid checking",
+              "subtype": "checking",
+              "type": "depository"
+            },
+            {
+              "account_id": "6Gwzm7nJ6ZU4VbqEyKzZszyPQ8keRet8Q97k7",
+              "balances": {
+                "available": 15000,
+                "current": 15000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "9572",
+              "name": "Test Student Loan Account",
+              "official_name": "Plaid student",
+              "subtype": "student",
+              "type": "loan"
+            }
+          ],
+          "item": {
+            "available_products": [
+              "assets",
+              "auth",
+              "balance",
+              "credit_details",
+              "identity",
+              "identity_match",
+              "income",
+              "income_verification",
+              "recurring_transactions",
+              "signal",
+              "statements"
+            ],
+            "billed_products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "consent_expiration_time": null,
+            "error": null,
+            "institution_id": "ins_109508",
+            "institution_name": "First Platypus Bank",
+            "item_id": "n7XKpjRmDkHENymaBw7rU71wxQnrW4i6DDrQP",
+            "products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "update_type": "background",
+            "webhook": ""
+          },
+          "request_id": "EWD5MMMYV0o9cZ0"
+        }
+  recorded_at: Mon, 19 May 2025 17:24:04 GMT
+recorded_with: VCR 6.3.1

test/vcr_cassettes/plaid/get_item_investments.yml

@@ -0,0 +1,570 @@
+---
+http_interactions:
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/investments/holdings/get
+    body:
+      encoding: UTF-8
+      string: '{"access_token":"access-sandbox-0af2c971-41a6-4fc5-a97d-f2b27ab0a648"}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:05 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '6199'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '324'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "accounts": [
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "balances": {
+                "available": 8000,
+                "current": 10000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "1122",
+              "name": "Test Brokerage Account",
+              "official_name": "Plaid brokerage",
+              "subtype": "brokerage",
+              "type": "investment"
+            },
+            {
+              "account_id": "RperV9wJMNiDWKljGMkPCkwDGJb7q7FaNlVMp",
+              "balances": {
+                "available": 9372.38,
+                "current": 1000,
+                "iso_currency_code": "USD",
+                "limit": 10500,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "1219",
+              "name": "Test Credit Card Account",
+              "official_name": "Plaid credit card",
+              "subtype": "credit card",
+              "type": "credit"
+            },
+            {
+              "account_id": "9mvxVZRW7LUD67QbEBm1CPZ6XlqkmkF4oGNBo",
+              "balances": {
+                "available": 10000,
+                "current": 10000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "4243",
+              "name": "Test Depository Account",
+              "official_name": "Plaid checking",
+              "subtype": "checking",
+              "type": "depository"
+            },
+            {
+              "account_id": "6Gwzm7nJ6ZU4VbqEyKzZszyPQ8keRet8Q97k7",
+              "balances": {
+                "available": 15000,
+                "current": 15000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "9572",
+              "name": "Test Student Loan Account",
+              "official_name": "Plaid student",
+              "subtype": "student",
+              "type": "loan"
+            }
+          ],
+          "holdings": [
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "cost_basis": 2000,
+              "institution_price": 100,
+              "institution_price_as_of": "2025-05-08",
+              "institution_price_datetime": null,
+              "institution_value": 2000,
+              "iso_currency_code": "USD",
+              "quantity": 20,
+              "security_id": "xnL3QM3Ax4fP9lVmNLblTDaMkVMqN3fmxrXRd",
+              "unofficial_currency_code": null,
+              "vested_quantity": null,
+              "vested_value": null
+            },
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "cost_basis": 3000,
+              "institution_price": 1,
+              "institution_price_as_of": "2025-05-08",
+              "institution_price_datetime": null,
+              "institution_value": 3000,
+              "iso_currency_code": "USD",
+              "quantity": 3000,
+              "security_id": "EDRxkXxj7mtj8EzBBxllUqpy7KyNDBugoZrMX",
+              "unofficial_currency_code": null,
+              "vested_quantity": null,
+              "vested_value": null
+            },
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "cost_basis": 5000,
+              "institution_price": 1,
+              "institution_price_as_of": "2025-05-08",
+              "institution_price_datetime": null,
+              "institution_value": 5000,
+              "iso_currency_code": "USD",
+              "quantity": 5000,
+              "security_id": "7Dv19k16PZtEaexk6EZyFxP95o9ynrF4REalG",
+              "unofficial_currency_code": null,
+              "vested_quantity": null,
+              "vested_value": null
+            }
+          ],
+          "item": {
+            "available_products": [
+              "assets",
+              "auth",
+              "balance",
+              "credit_details",
+              "identity",
+              "identity_match",
+              "income",
+              "income_verification",
+              "recurring_transactions",
+              "signal",
+              "statements"
+            ],
+            "billed_products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "consent_expiration_time": null,
+            "error": null,
+            "institution_id": "ins_109508",
+            "institution_name": "First Platypus Bank",
+            "item_id": "n7XKpjRmDkHENymaBw7rU71wxQnrW4i6DDrQP",
+            "products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "update_type": "background",
+            "webhook": ""
+          },
+          "request_id": "uRzq5c4Y37RCNNj",
+          "securities": [
+            {
+              "close_price": 1,
+              "close_price_as_of": "2025-04-28",
+              "cusip": null,
+              "fixed_income": null,
+              "industry": "Investment Trusts or Mutual Funds",
+              "institution_id": null,
+              "institution_security_id": null,
+              "is_cash_equivalent": true,
+              "isin": null,
+              "iso_currency_code": "USD",
+              "market_identifier_code": null,
+              "name": "Vanguard Money Market Reserves - Federal Money Market Fd USD MNT",
+              "option_contract": null,
+              "proxy_security_id": null,
+              "sector": "Miscellaneous",
+              "security_id": "7Dv19k16PZtEaexk6EZyFxP95o9ynrF4REalG",
+              "sedol": "2571678",
+              "ticker_symbol": "VMFXX",
+              "type": "mutual fund",
+              "unofficial_currency_code": null,
+              "update_datetime": null
+            },
+            {
+              "close_price": 1,
+              "close_price_as_of": "2025-05-18",
+              "cusip": null,
+              "fixed_income": null,
+              "industry": null,
+              "institution_id": null,
+              "institution_security_id": null,
+              "is_cash_equivalent": true,
+              "isin": null,
+              "iso_currency_code": "USD",
+              "market_identifier_code": null,
+              "name": "U S Dollar",
+              "option_contract": null,
+              "proxy_security_id": null,
+              "sector": null,
+              "security_id": "EDRxkXxj7mtj8EzBBxllUqpy7KyNDBugoZrMX",
+              "sedol": null,
+              "ticker_symbol": "CUR:USD",
+              "type": "cash",
+              "unofficial_currency_code": null,
+              "update_datetime": null
+            },
+            {
+              "close_price": 211.26,
+              "close_price_as_of": "2025-05-16",
+              "cusip": null,
+              "fixed_income": null,
+              "industry": "Telecommunications Equipment",
+              "institution_id": null,
+              "institution_security_id": null,
+              "is_cash_equivalent": false,
+              "isin": null,
+              "iso_currency_code": "USD",
+              "market_identifier_code": "XNAS",
+              "name": "Apple Inc",
+              "option_contract": null,
+              "proxy_security_id": null,
+              "sector": "Electronic Technology",
+              "security_id": "xnL3QM3Ax4fP9lVmNLblTDaMkVMqN3fmxrXRd",
+              "sedol": "2046251",
+              "ticker_symbol": "AAPL",
+              "type": "equity",
+              "unofficial_currency_code": null,
+              "update_datetime": null
+            }
+          ]
+        }
+  recorded_at: Mon, 19 May 2025 17:24:05 GMT
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/investments/transactions/get
+    body:
+      encoding: UTF-8
+      string: '{"access_token":"access-sandbox-0af2c971-41a6-4fc5-a97d-f2b27ab0a648","start_date":"2023-05-20","end_date":"2025-05-19","options":{"offset":0}}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:05 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '6964'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '334'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "accounts": [
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "balances": {
+                "available": 8000,
+                "current": 10000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "1122",
+              "name": "Test Brokerage Account",
+              "official_name": "Plaid brokerage",
+              "subtype": "brokerage",
+              "type": "investment"
+            },
+            {
+              "account_id": "RperV9wJMNiDWKljGMkPCkwDGJb7q7FaNlVMp",
+              "balances": {
+                "available": 9372.38,
+                "current": 1000,
+                "iso_currency_code": "USD",
+                "limit": 10500,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "1219",
+              "name": "Test Credit Card Account",
+              "official_name": "Plaid credit card",
+              "subtype": "credit card",
+              "type": "credit"
+            },
+            {
+              "account_id": "9mvxVZRW7LUD67QbEBm1CPZ6XlqkmkF4oGNBo",
+              "balances": {
+                "available": 10000,
+                "current": 10000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "4243",
+              "name": "Test Depository Account",
+              "official_name": "Plaid checking",
+              "subtype": "checking",
+              "type": "depository"
+            },
+            {
+              "account_id": "6Gwzm7nJ6ZU4VbqEyKzZszyPQ8keRet8Q97k7",
+              "balances": {
+                "available": 15000,
+                "current": 15000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "9572",
+              "name": "Test Student Loan Account",
+              "official_name": "Plaid student",
+              "subtype": "student",
+              "type": "loan"
+            }
+          ],
+          "investment_transactions": [
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "amount": -5000,
+              "cancel_transaction_id": null,
+              "date": "2025-05-03",
+              "fees": 0,
+              "investment_transaction_id": "eBqoazM4XkiXx5gZbmD7UKRZ3jE3ABUreq4R1",
+              "iso_currency_code": "USD",
+              "name": "retirement contribution",
+              "price": 1,
+              "quantity": -5000,
+              "security_id": "EDRxkXxj7mtj8EzBBxllUqpy7KyNDBugoZrMX",
+              "subtype": "contribution",
+              "type": "cash",
+              "unofficial_currency_code": null
+            },
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "amount": 5000,
+              "cancel_transaction_id": null,
+              "date": "2025-05-03",
+              "fees": 0,
+              "investment_transaction_id": "QLeKVkpQM4ck1qMRGp6PUPp7obKowGtwRN547",
+              "iso_currency_code": "USD",
+              "name": "buy money market shares with contribution cash",
+              "price": 1,
+              "quantity": 5000,
+              "security_id": "7Dv19k16PZtEaexk6EZyFxP95o9ynrF4REalG",
+              "subtype": "contribution",
+              "type": "buy",
+              "unofficial_currency_code": null
+            },
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "amount": 2000,
+              "cancel_transaction_id": null,
+              "date": "2025-05-02",
+              "fees": 0,
+              "investment_transaction_id": "ZnxNgJEwM1ig5476JqZxUKeJLXNLnMUe9o6Al",
+              "iso_currency_code": "USD",
+              "name": "buy AAPL stock",
+              "price": 100,
+              "quantity": 20,
+              "security_id": "xnL3QM3Ax4fP9lVmNLblTDaMkVMqN3fmxrXRd",
+              "subtype": "buy",
+              "type": "buy",
+              "unofficial_currency_code": null
+            },
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "amount": -5000,
+              "cancel_transaction_id": null,
+              "date": "2025-05-01",
+              "fees": 0,
+              "investment_transaction_id": "MQ1Awmg943IKyWlQjRXgUqXrxD6xo3CLGjJw1",
+              "iso_currency_code": "USD",
+              "name": "Deposit cash into brokerage account",
+              "price": 1,
+              "quantity": -5000,
+              "security_id": "EDRxkXxj7mtj8EzBBxllUqpy7KyNDBugoZrMX",
+              "subtype": "deposit",
+              "type": "cash",
+              "unofficial_currency_code": null
+            }
+          ],
+          "item": {
+            "available_products": [
+              "assets",
+              "auth",
+              "balance",
+              "credit_details",
+              "identity",
+              "identity_match",
+              "income",
+              "income_verification",
+              "recurring_transactions",
+              "signal",
+              "statements"
+            ],
+            "billed_products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "consent_expiration_time": null,
+            "error": null,
+            "institution_id": "ins_109508",
+            "institution_name": "First Platypus Bank",
+            "item_id": "n7XKpjRmDkHENymaBw7rU71wxQnrW4i6DDrQP",
+            "products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "update_type": "background",
+            "webhook": ""
+          },
+          "request_id": "dTc49uKiBZWzxHS",
+          "securities": [
+            {
+              "close_price": 1,
+              "close_price_as_of": "2025-04-28",
+              "cusip": null,
+              "fixed_income": null,
+              "industry": "Investment Trusts or Mutual Funds",
+              "institution_id": null,
+              "institution_security_id": null,
+              "is_cash_equivalent": true,
+              "isin": null,
+              "iso_currency_code": "USD",
+              "market_identifier_code": null,
+              "name": "Vanguard Money Market Reserves - Federal Money Market Fd USD MNT",
+              "option_contract": null,
+              "proxy_security_id": null,
+              "sector": "Miscellaneous",
+              "security_id": "7Dv19k16PZtEaexk6EZyFxP95o9ynrF4REalG",
+              "sedol": "2571678",
+              "ticker_symbol": "VMFXX",
+              "type": "mutual fund",
+              "unofficial_currency_code": null,
+              "update_datetime": null
+            },
+            {
+              "close_price": 1,
+              "close_price_as_of": "2025-05-18",
+              "cusip": null,
+              "fixed_income": null,
+              "industry": null,
+              "institution_id": null,
+              "institution_security_id": null,
+              "is_cash_equivalent": true,
+              "isin": null,
+              "iso_currency_code": "USD",
+              "market_identifier_code": null,
+              "name": "U S Dollar",
+              "option_contract": null,
+              "proxy_security_id": null,
+              "sector": null,
+              "security_id": "EDRxkXxj7mtj8EzBBxllUqpy7KyNDBugoZrMX",
+              "sedol": null,
+              "ticker_symbol": "CUR:USD",
+              "type": "cash",
+              "unofficial_currency_code": null,
+              "update_datetime": null
+            },
+            {
+              "close_price": 211.26,
+              "close_price_as_of": "2025-05-16",
+              "cusip": null,
+              "fixed_income": null,
+              "industry": "Telecommunications Equipment",
+              "institution_id": null,
+              "institution_security_id": null,
+              "is_cash_equivalent": false,
+              "isin": null,
+              "iso_currency_code": "USD",
+              "market_identifier_code": "XNAS",
+              "name": "Apple Inc",
+              "option_contract": null,
+              "proxy_security_id": null,
+              "sector": "Electronic Technology",
+              "security_id": "xnL3QM3Ax4fP9lVmNLblTDaMkVMqN3fmxrXRd",
+              "sedol": "2046251",
+              "ticker_symbol": "AAPL",
+              "type": "equity",
+              "unofficial_currency_code": null,
+              "update_datetime": null
+            }
+          ],
+          "total_investment_transactions": 4
+        }
+  recorded_at: Mon, 19 May 2025 17:24:05 GMT
+recorded_with: VCR 6.3.1

test/vcr_cassettes/plaid/get_item_liabilities.yml

@@ -0,0 +1,236 @@
+---
+http_interactions:
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/liabilities/get
+    body:
+      encoding: UTF-8
+      string: '{"access_token":"access-sandbox-0af2c971-41a6-4fc5-a97d-f2b27ab0a648"}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:04 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '4907'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '253'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "accounts": [
+            {
+              "account_id": "vor45kgbDjfqa1BMD8QRU4om8adWNWtqbzQJe",
+              "balances": {
+                "available": 8000,
+                "current": 10000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "1122",
+              "name": "Test Brokerage Account",
+              "official_name": "Plaid brokerage",
+              "subtype": "brokerage",
+              "type": "investment"
+            },
+            {
+              "account_id": "RperV9wJMNiDWKljGMkPCkwDGJb7q7FaNlVMp",
+              "balances": {
+                "available": 9372.38,
+                "current": 1000,
+                "iso_currency_code": "USD",
+                "limit": 10500,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "1219",
+              "name": "Test Credit Card Account",
+              "official_name": "Plaid credit card",
+              "subtype": "credit card",
+              "type": "credit"
+            },
+            {
+              "account_id": "9mvxVZRW7LUD67QbEBm1CPZ6XlqkmkF4oGNBo",
+              "balances": {
+                "available": 10000,
+                "current": 10000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "4243",
+              "name": "Test Depository Account",
+              "official_name": "Plaid checking",
+              "subtype": "checking",
+              "type": "depository"
+            },
+            {
+              "account_id": "6Gwzm7nJ6ZU4VbqEyKzZszyPQ8keRet8Q97k7",
+              "balances": {
+                "available": 15000,
+                "current": 15000,
+                "iso_currency_code": "USD",
+                "limit": null,
+                "unofficial_currency_code": null
+              },
+              "holder_category": "personal",
+              "mask": "9572",
+              "name": "Test Student Loan Account",
+              "official_name": "Plaid student",
+              "subtype": "student",
+              "type": "loan"
+            }
+          ],
+          "item": {
+            "available_products": [
+              "assets",
+              "auth",
+              "balance",
+              "credit_details",
+              "identity",
+              "identity_match",
+              "income",
+              "income_verification",
+              "recurring_transactions",
+              "signal",
+              "statements"
+            ],
+            "billed_products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "consent_expiration_time": null,
+            "error": null,
+            "institution_id": "ins_109508",
+            "institution_name": "First Platypus Bank",
+            "item_id": "n7XKpjRmDkHENymaBw7rU71wxQnrW4i6DDrQP",
+            "products": [
+              "investments",
+              "liabilities",
+              "transactions"
+            ],
+            "update_type": "background",
+            "webhook": ""
+          },
+          "liabilities": {
+            "credit": [
+              {
+                "account_id": "RperV9wJMNiDWKljGMkPCkwDGJb7q7FaNlVMp",
+                "aprs": [
+                  {
+                    "apr_percentage": 12.5,
+                    "apr_type": "purchase_apr",
+                    "balance_subject_to_apr": null,
+                    "interest_charge_amount": null
+                  },
+                  {
+                    "apr_percentage": 27.95,
+                    "apr_type": "cash_apr",
+                    "balance_subject_to_apr": null,
+                    "interest_charge_amount": null
+                  }
+                ],
+                "is_overdue": false,
+                "last_payment_amount": null,
+                "last_payment_date": "2025-04-24",
+                "last_statement_balance": 1000,
+                "last_statement_issue_date": "2025-05-19",
+                "minimum_payment_amount": 50,
+                "next_payment_due_date": "2025-06-19"
+              }
+            ],
+            "mortgage": null,
+            "student": [
+              {
+                "account_id": "6Gwzm7nJ6ZU4VbqEyKzZszyPQ8keRet8Q97k7",
+                "account_number": "3117529572",
+                "disbursement_dates": [
+                  "2023-05-01"
+                ],
+                "expected_payoff_date": "2036-05-01",
+                "guarantor": "DEPT OF ED",
+                "interest_rate_percentage": 5.25,
+                "is_overdue": false,
+                "last_payment_amount": null,
+                "last_payment_date": null,
+                "last_statement_balance": 16577.16,
+                "last_statement_issue_date": "2025-05-01",
+                "loan_name": "Consolidation",
+                "loan_status": {
+                  "end_date": null,
+                  "type": "in school"
+                },
+                "minimum_payment_amount": 25,
+                "next_payment_due_date": "2025-06-01",
+                "origination_date": "2023-05-01",
+                "origination_principal_amount": 15000,
+                "outstanding_interest_amount": 1577.16,
+                "payment_reference_number": "3117529572",
+                "pslf_status": {
+                  "estimated_eligibility_date": null,
+                  "payments_made": null,
+                  "payments_remaining": null
+                },
+                "repayment_plan": {
+                  "description": "Standard Repayment",
+                  "type": "standard"
+                },
+                "sequence_number": "1",
+                "servicer_address": {
+                  "city": "San Matias",
+                  "country": "US",
+                  "postal_code": "99415",
+                  "region": "CA",
+                  "street": "123 Relaxation Road"
+                },
+                "ytd_interest_paid": 0,
+                "ytd_principal_paid": 0
+              }
+            ]
+          },
+          "request_id": "nFlL291sKIy1LkJ"
+        }
+  recorded_at: Mon, 19 May 2025 17:24:04 GMT
+recorded_with: VCR 6.3.1

test/vcr_cassettes/plaid/link_token.yml

@@ -0,0 +1,64 @@
+---
+http_interactions:
+- request:
+    method: post
+    uri: https://sandbox.plaid.com/link/token/create
+    body:
+      encoding: UTF-8
+      string: '{"client_name":"Maybe Finance","language":"en","country_codes":["US","CA"],"user":{"client_user_id":"test-user-id"},"products":["transactions"],"additional_consented_products":["investments","liabilities"],"webhook":"https://example.com/webhooks","redirect_uri":"http://localhost:3000/accounts","transactions":{"days_requested":730}}'
+    headers:
+      Content-Type:
+      - application/json
+      User-Agent:
+      - Plaid Ruby v38.0.0
+      Accept:
+      - application/json
+      Plaid-Client-Id:
+      - "<PLAID_CLIENT_ID>"
+      Plaid-Version:
+      - '2020-09-14'
+      Plaid-Secret:
+      - "<PLAID_SECRET>"
+      Accept-Encoding:
+      - gzip;q=1.0,deflate;q=0.6,identity;q=0.3
+  response:
+    status:
+      code: 200
+      message: OK
+    headers:
+      Server:
+      - nginx
+      Date:
+      - Mon, 19 May 2025 17:24:04 GMT
+      Content-Type:
+      - application/json; charset=utf-8
+      Content-Length:
+      - '146'
+      Connection:
+      - keep-alive
+      Plaid-Version:
+      - '2020-09-14'
+      Vary:
+      - Accept-Encoding
+      X-Envoy-Upstream-Service-Time:
+      - '70'
+      X-Envoy-Decorator-Operation:
+      - default.svc-apiv2:8080/*
+      Strict-Transport-Security:
+      - max-age=31536000; includeSubDomains; preload
+      X-Content-Type-Options:
+      - nosniff
+      X-Frame-Options:
+      - DENY
+      X-Xss-Protection:
+      - 1; mode=block
+    body:
+      encoding: ASCII-8BIT
+      string: |-
+        {
+          "expiration": "2025-05-19T21:24:04Z",
+          "link_token": "link-sandbox-33432e02-32e2-415d-8f00-e626c6f4c6a6",
+          "request_id": "Gys5pGY7tIPDrlL"
+        }
+  recorded_at: Mon, 19 May 2025 17:24:04 GMT
+recorded_with: VCR 6.3.1