import { SignedOrder } from '@0xproject/types'; import * as _ from 'lodash'; import { constants } from './constants'; export const calldataOptimizationUtils = { /** * Takes an array of orders and outputs an array of equivalent orders where all takerAssetData are '0x' and * all makerAssetData are '0x' except for that of the first order, which retains its original value * @param orders An array of SignedOrder objects * @returns optimized orders */ optimizeForwarderOrders(orders: SignedOrder[]): SignedOrder[] { const optimizedOrders = _.map(orders, (order, index) => transformOrder(order, { makerAssetData: index === 0 ? order.makerAssetData : constants.NULL_BYTES, takerAssetData: constants.NULL_BYTES, }), ); return optimizedOrders; }, /** * Takes an array of orders and outputs an array of equivalent orders where all takerAssetData are '0x' and * all makerAssetData are '0x' * @param orders An array of SignedOrder objects * @returns optimized orders */ optimizeForwarderFeeOrders(orders: SignedOrder[]): SignedOrder[] { const optimizedOrders = _.map(orders, (order, index) => transformOrder(order, { makerAssetData: constants.NULL_BYTES, takerAssetData: constants.NULL_BYTES, }), ); return optimizedOrders; }, }; const transformOrder = (order: SignedOrder, partialOrder: Partial) => { return { ...order, ...partialOrder, }; };