Class: PandoBot::Lake::PairRoutes

Inherits:
Object
  • Object
show all
Defined in:
lib/pando_bot/lake/pair_routes.rb

Overview

swap using paris

Constant Summary collapse

PRECISION = 
8
HASH_SALT = 
'uniswap routes'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pairs) ⇒ PairRoutes

Returns a new instance of PairRoutes.



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# File 'lib/pando_bot/lake/pair_routes.rb', line 17

def initialize(pairs)
  @uniswap = PandoBot::Lake::Uniswap.new
  @curve = PandoBot::Lake::Curve.new
  @routes = {}.with_indifferent_access
  @pairs =
    pairs.map do |pair|
      pair = pair.with_indifferent_access

      base_amount = pair[:base_amount].to_f
      quote_amount = pair[:quote_amount].to_f
      fill_percent = 1 - pair[:fee_percent].to_f

      d = 0
      d = @curve.d_const([base_amount * 1e9, quote_amount * 1e9]) if pair[:swap_method] == 'curve'

      pair.merge(
        base_amount:,
        quote_amount:,
        fill_percent:,
        K: (base_amount * quote_amount),
        D: d
      )
    end
  @pairs.each do |pair|
    set_asset_route pair[:base_asset_id], pair
    set_asset_route pair[:quote_asset_id], pair
  end
  @pairs.freeze
end

Instance Attribute Details

#curve ⇒ Object (readonly)

Returns the value of attribute curve.



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# File 'lib/pando_bot/lake/pair_routes.rb', line 15

def curve
  @curve
end

#pairs ⇒ Object (readonly)

Returns the value of attribute pairs.



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# File 'lib/pando_bot/lake/pair_routes.rb', line 15

def pairs
  @pairs
end

#routes ⇒ Object (readonly)

Returns the value of attribute routes.



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# File 'lib/pando_bot/lake/pair_routes.rb', line 15

def routes
  @routes
end

#uniswap ⇒ Object (readonly)

Returns the value of attribute uniswap.



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# File 'lib/pando_bot/lake/pair_routes.rb', line 15

def uniswap
  @uniswap
end

Instance Method Details

#pre_order(input_asset:, output_asset:, input_amount: nil, output_amount: nil) ⇒ Object

Raises:



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# File 'lib/pando_bot/lake/pair_routes.rb', line 47

def pre_order(input_asset:, output_asset:, input_amount: nil, output_amount: nil)
  funds = input_amount.to_f.ceil(PRECISION)
  amount = output_amount.to_f.floor(PRECISION)

  if input_amount.present?
    raise PandoBot::Lake::SwapError, 'input amount invalid' if input_amount.negative?

    best = best_route input_asset, output_asset, input_amount
    amount = best[:amount]
  elsif output_amount.present?
    raise PandoBot::Lake::SwapError, 'output amount invalid' if output_amount.negative?

    best = best_route_reverse input_asset, output_asset, output_amount
    funds = best[:funds]
  else
    raise PandoBot::Lake::SwapError, 'input or output are needed'
  end

  raise PandoBot::Lake::SwapError, 'no pair route found' if best.blank?

  raise PandoBot::Lake::SwapError, 'swap amount not support' if amount.blank? || funds.blank?

  best
    .merge(
      {
        amount: format("%.#{PRECISION}f", amount),
        funds: format("%.#{PRECISION}f", funds),
        route_assets: best[:route_assets],
        price_impact: best[:price_impact],
        routes: Hashids.new(HASH_SALT).encode(best[:route_ids]),
        pay_asset_id: input_asset,
        fill_asset_id: output_asset,
        pay_amount: format("%.#{PRECISION}f", funds),
        fill_amount: format("%.#{PRECISION}f", amount),
        state: 'Done'
      }
    )
end