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https://github.com/maybe-finance/maybe.git
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110855d077
* Support all currencies, handle outside DB * Remove currencies from seed * Fix account balance namespace * Set default currency on authentication * Cache currency instances * Implement multi-currency syncs with tests * Series fallback, passing tests * Fix conflicts * Make value group concrete class that works with currency values * Fix migration conflict * Update tests to expect multi-currency results * Update account list to use group method * Namespace updates * Fetch unknown exchange rates from API * Fix date range bug * Ensure demo data works without external API * Enforce cascades only at DB level
42 lines
1.3 KiB
Ruby
42 lines
1.3 KiB
Ruby
class ExchangeRate < ApplicationRecord
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validates :base_currency, :converted_currency, presence: true
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class << self
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def convert(from, to, amount)
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rate = ExchangeRate.find_by(base_currency: from, converted_currency: to, date: Date.current)
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return nil if rate.nil?
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amount * rate.rate
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end
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def get_rate(from, to, date)
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_from = Money::Currency.new(from)
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_to = Money::Currency.new(to)
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find_by! base_currency: _from.iso_code, converted_currency: _to.iso_code, date: date
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rescue
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logger.warn "Exchange rate not found for #{_from.iso_code} to #{_to.iso_code} on #{date}"
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nil
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end
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def get_rate_series(from, to, date_range)
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where(base_currency: from, converted_currency: to, date: date_range).order(:date)
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end
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# TODO: Replace with generic provider
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# See https://github.com/maybe-finance/maybe/pull/556
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def fetch_rate_from_provider(from, to, date)
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response = Faraday.get("https://api.synthfinance.com/rates/historical") do |req|
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req.headers["Authorization"] = "Bearer #{ENV["SYNTH_API_KEY"]}"
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req.params["date"] = date.to_s
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req.params["from"] = from
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req.params["to"] = to
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end
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if response.success?
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rates = JSON.parse(response.body)
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rates.dig("data", "rates", to)
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else
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nil
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end
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end
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end
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end
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