59 lines
2.5 KiB
TypeScript
59 lines
2.5 KiB
TypeScript
import { OrderWithoutExchangeAddress, SignedOrder } from '@0x/types';
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import { BigNumber } from '@0x/utils';
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import { constants } from './constants';
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import { CancelOrder, MatchOrder } from './types';
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export const orderUtils = {
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getPartialAmountFloor(numerator: BigNumber, denominator: BigNumber, target: BigNumber): BigNumber {
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const partialAmount = numerator
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.mul(target)
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.div(denominator)
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.floor();
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return partialAmount;
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},
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createFill: (signedOrder: SignedOrder, takerAssetFillAmount?: BigNumber) => {
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const fill = {
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order: orderUtils.getOrderWithoutExchangeAddress(signedOrder),
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takerAssetFillAmount: takerAssetFillAmount || signedOrder.takerAssetAmount,
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signature: signedOrder.signature,
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};
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return fill;
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},
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createCancel(signedOrder: SignedOrder, takerAssetCancelAmount?: BigNumber): CancelOrder {
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const cancel = {
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order: orderUtils.getOrderWithoutExchangeAddress(signedOrder),
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takerAssetCancelAmount: takerAssetCancelAmount || signedOrder.takerAssetAmount,
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};
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return cancel;
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},
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getOrderWithoutExchangeAddress(signedOrder: SignedOrder): OrderWithoutExchangeAddress {
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const orderStruct = {
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senderAddress: signedOrder.senderAddress,
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makerAddress: signedOrder.makerAddress,
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takerAddress: signedOrder.takerAddress,
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feeRecipientAddress: signedOrder.feeRecipientAddress,
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makerAssetAmount: signedOrder.makerAssetAmount,
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takerAssetAmount: signedOrder.takerAssetAmount,
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makerFee: signedOrder.makerFee,
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takerFee: signedOrder.takerFee,
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expirationTimeSeconds: signedOrder.expirationTimeSeconds,
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salt: signedOrder.salt,
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makerAssetData: signedOrder.makerAssetData,
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takerAssetData: signedOrder.takerAssetData,
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};
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return orderStruct;
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},
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createMatchOrders(signedOrderLeft: SignedOrder, signedOrderRight: SignedOrder): MatchOrder {
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const fill = {
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left: orderUtils.getOrderWithoutExchangeAddress(signedOrderLeft),
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right: orderUtils.getOrderWithoutExchangeAddress(signedOrderRight),
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leftSignature: signedOrderLeft.signature,
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rightSignature: signedOrderRight.signature,
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};
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fill.right.makerAssetData = constants.NULL_BYTES;
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fill.right.takerAssetData = constants.NULL_BYTES;
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return fill;
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},
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};
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