Method: Bitex::Rates.calculate_path_backwards

Defined in:
lib/bitex/rates.rb

.calculate_path_backwards(path, value) ⇒ Object 



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# File 'lib/bitex/rates.rb', line 44

def self.calculate_path_backwards(path, value)
  value = value.to_d
  path_to_calculator(path).each do |step|
    step.symbolize_keys!
    case step[:type].to_sym
    when :exchange
      value /= step[:rate].to_d
    when :percentual_fee
      value /= 1 - (step[:percentage].to_d / 100.to_d)
    when :fixed_fee
      value += step[:amount].to_d
    when :minimum_fee
      value = [value + step[:minimum].to_d, value / (1 - (step[:percentage].to_d / 100.to_d))].max
    end
  end
  value
end