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author | Fabio Berger <me@fabioberger.com> | 2018-05-10 02:36:28 +0800 |
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committer | Fabio Berger <me@fabioberger.com> | 2018-05-10 02:36:28 +0800 |
commit | 209266dbed9d7d038c90c2da8d9b99acab77c80c (patch) | |
tree | cfefd5ab15bc237716b15687629e0f41362a8e86 /packages/0x.js/src/utils/order_state_utils.ts | |
parent | 69a6166b6a1d39afc24b8dd950ec5d8539a03420 (diff) | |
download | dexon-sol-tools-209266dbed9d7d038c90c2da8d9b99acab77c80c.tar.gz dexon-sol-tools-209266dbed9d7d038c90c2da8d9b99acab77c80c.tar.zst dexon-sol-tools-209266dbed9d7d038c90c2da8d9b99acab77c80c.zip |
Split 0x.js into contract-wrappers, order-watcher but keep 0x.js as a unifying library with the same interface
Diffstat (limited to 'packages/0x.js/src/utils/order_state_utils.ts')
-rw-r--r-- | packages/0x.js/src/utils/order_state_utils.ts | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/packages/0x.js/src/utils/order_state_utils.ts b/packages/0x.js/src/utils/order_state_utils.ts deleted file mode 100644 index b0310d8a8..000000000 --- a/packages/0x.js/src/utils/order_state_utils.ts +++ /dev/null @@ -1,138 +0,0 @@ -import { SignedOrder } from '@0xproject/types'; -import { BigNumber } from '@0xproject/utils'; -import * as _ from 'lodash'; - -import { ZeroEx } from '../0x'; -import { BalanceAndProxyAllowanceFetcher } from '../abstract/balance_and_proxy_allowance_fetcher'; -import { OrderFilledCancelledFetcher } from '../abstract/order_filled_cancelled_fetcher'; -import { ExchangeWrapper } from '../contract_wrappers/exchange_wrapper'; -import { RemainingFillableCalculator } from '../order_watcher/remaining_fillable_calculator'; -import { ExchangeContractErrs, OrderRelevantState, OrderState, OrderStateInvalid, OrderStateValid } from '../types'; - -const ACCEPTABLE_RELATIVE_ROUNDING_ERROR = 0.0001; - -export class OrderStateUtils { - private _balanceAndProxyAllowanceFetcher: BalanceAndProxyAllowanceFetcher; - private _orderFilledCancelledFetcher: OrderFilledCancelledFetcher; - private static _validateIfOrderIsValid(signedOrder: SignedOrder, orderRelevantState: OrderRelevantState): void { - const unavailableTakerTokenAmount = orderRelevantState.cancelledTakerTokenAmount.add( - orderRelevantState.filledTakerTokenAmount, - ); - const availableTakerTokenAmount = signedOrder.takerTokenAmount.minus(unavailableTakerTokenAmount); - if (availableTakerTokenAmount.eq(0)) { - throw new Error(ExchangeContractErrs.OrderRemainingFillAmountZero); - } - - if (orderRelevantState.makerBalance.eq(0)) { - throw new Error(ExchangeContractErrs.InsufficientMakerBalance); - } - if (orderRelevantState.makerProxyAllowance.eq(0)) { - throw new Error(ExchangeContractErrs.InsufficientMakerAllowance); - } - if (!signedOrder.makerFee.eq(0)) { - if (orderRelevantState.makerFeeBalance.eq(0)) { - throw new Error(ExchangeContractErrs.InsufficientMakerFeeBalance); - } - if (orderRelevantState.makerFeeProxyAllowance.eq(0)) { - throw new Error(ExchangeContractErrs.InsufficientMakerFeeAllowance); - } - } - const minFillableTakerTokenAmountWithinNoRoundingErrorRange = signedOrder.takerTokenAmount - .dividedBy(ACCEPTABLE_RELATIVE_ROUNDING_ERROR) - .dividedBy(signedOrder.makerTokenAmount); - if ( - orderRelevantState.remainingFillableTakerTokenAmount.lessThan( - minFillableTakerTokenAmountWithinNoRoundingErrorRange, - ) - ) { - throw new Error(ExchangeContractErrs.OrderFillRoundingError); - } - } - constructor( - balanceAndProxyAllowanceFetcher: BalanceAndProxyAllowanceFetcher, - orderFilledCancelledFetcher: OrderFilledCancelledFetcher, - ) { - this._balanceAndProxyAllowanceFetcher = balanceAndProxyAllowanceFetcher; - this._orderFilledCancelledFetcher = orderFilledCancelledFetcher; - } - public async getOrderStateAsync(signedOrder: SignedOrder): Promise<OrderState> { - const orderRelevantState = await this.getOrderRelevantStateAsync(signedOrder); - const orderHash = ZeroEx.getOrderHashHex(signedOrder); - try { - OrderStateUtils._validateIfOrderIsValid(signedOrder, orderRelevantState); - const orderState: OrderStateValid = { - isValid: true, - orderHash, - orderRelevantState, - }; - return orderState; - } catch (err) { - const orderState: OrderStateInvalid = { - isValid: false, - orderHash, - error: err.message, - }; - return orderState; - } - } - public async getOrderRelevantStateAsync(signedOrder: SignedOrder): Promise<OrderRelevantState> { - // HACK: We access the private property here but otherwise the interface will be less nice. - // If we pass it from the instantiator - there is no opportunity to get it there - // because JS doesn't support async constructors. - // Moreover - it's cached under the hood so it's equivalent to an async constructor. - const exchange = (this._orderFilledCancelledFetcher as any)._exchangeWrapper as ExchangeWrapper; - const zrxTokenAddress = exchange.getZRXTokenAddress(); - const orderHash = ZeroEx.getOrderHashHex(signedOrder); - const makerBalance = await this._balanceAndProxyAllowanceFetcher.getBalanceAsync( - signedOrder.makerTokenAddress, - signedOrder.maker, - ); - const makerProxyAllowance = await this._balanceAndProxyAllowanceFetcher.getProxyAllowanceAsync( - signedOrder.makerTokenAddress, - signedOrder.maker, - ); - const makerFeeBalance = await this._balanceAndProxyAllowanceFetcher.getBalanceAsync( - zrxTokenAddress, - signedOrder.maker, - ); - const makerFeeProxyAllowance = await this._balanceAndProxyAllowanceFetcher.getProxyAllowanceAsync( - zrxTokenAddress, - signedOrder.maker, - ); - const filledTakerTokenAmount = await this._orderFilledCancelledFetcher.getFilledTakerAmountAsync(orderHash); - const cancelledTakerTokenAmount = await this._orderFilledCancelledFetcher.getCancelledTakerAmountAsync( - orderHash, - ); - const unavailableTakerTokenAmount = await exchange.getUnavailableTakerAmountAsync(orderHash); - const totalMakerTokenAmount = signedOrder.makerTokenAmount; - const totalTakerTokenAmount = signedOrder.takerTokenAmount; - const remainingTakerTokenAmount = totalTakerTokenAmount.minus(unavailableTakerTokenAmount); - const remainingMakerTokenAmount = remainingTakerTokenAmount - .times(totalMakerTokenAmount) - .dividedToIntegerBy(totalTakerTokenAmount); - const transferrableMakerTokenAmount = BigNumber.min([makerProxyAllowance, makerBalance]); - const transferrableFeeTokenAmount = BigNumber.min([makerFeeProxyAllowance, makerFeeBalance]); - - const isMakerTokenZRX = signedOrder.makerTokenAddress === zrxTokenAddress; - const remainingFillableCalculator = new RemainingFillableCalculator( - signedOrder, - isMakerTokenZRX, - transferrableMakerTokenAmount, - transferrableFeeTokenAmount, - remainingMakerTokenAmount, - ); - const remainingFillableMakerTokenAmount = remainingFillableCalculator.computeRemainingMakerFillable(); - const remainingFillableTakerTokenAmount = remainingFillableCalculator.computeRemainingTakerFillable(); - const orderRelevantState = { - makerBalance, - makerProxyAllowance, - makerFeeBalance, - makerFeeProxyAllowance, - filledTakerTokenAmount, - cancelledTakerTokenAmount, - remainingFillableMakerTokenAmount, - remainingFillableTakerTokenAmount, - }; - return orderRelevantState; - } -} |