59 lines
1.8 KiB
TypeScript
59 lines
1.8 KiB
TypeScript
import { BigNumber } from '@0x/utils';
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import * as _ from 'lodash';
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import { ERC20BridgeSource } from '../../src';
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import { constants } from '../../src/constants';
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import { MarketOperation, SignedOrderWithFillableAmounts, SwapQuote } from '../../src/types';
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import { ProtocolFeeUtils } from '../../src/utils/protocol_fee_utils';
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/**
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* Creates a swap quote given orders.
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*/
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export async function getFullyFillableSwapQuoteWithNoFeesAsync(
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makerAssetData: string,
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takerAssetData: string,
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orders: SignedOrderWithFillableAmounts[],
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operation: MarketOperation,
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gasPrice: BigNumber,
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protocolFeeUtils: ProtocolFeeUtils,
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): Promise<SwapQuote> {
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const makerAssetFillAmount = BigNumber.sum(...[0, ...orders.map(o => o.makerAssetAmount)]);
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const totalTakerAssetAmount = BigNumber.sum(...[0, ...orders.map(o => o.takerAssetAmount)]);
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const quoteInfo = {
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makerAssetAmount: makerAssetFillAmount,
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feeTakerAssetAmount: constants.ZERO_AMOUNT,
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takerAssetAmount: totalTakerAssetAmount,
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totalTakerAssetAmount,
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protocolFeeInWeiAmount: await protocolFeeUtils.calculateWorstCaseProtocolFeeAsync(orders, gasPrice),
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gas: 200e3,
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};
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const breakdown = {
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[ERC20BridgeSource.Native]: new BigNumber(1),
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};
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const quoteBase = {
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makerAssetData,
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takerAssetData,
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orders,
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gasPrice,
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bestCaseQuoteInfo: quoteInfo,
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worstCaseQuoteInfo: quoteInfo,
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sourceBreakdown: breakdown,
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};
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if (operation === MarketOperation.Buy) {
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return {
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...quoteBase,
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type: MarketOperation.Buy,
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makerAssetFillAmount,
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};
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} else {
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return {
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...quoteBase,
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type: MarketOperation.Sell,
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takerAssetFillAmount: totalTakerAssetAmount,
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};
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}
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}
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