diff options
Diffstat (limited to 'packages/0x.js/src/utils/exchange_transfer_simulator.ts')
| -rw-r--r-- | packages/0x.js/src/utils/exchange_transfer_simulator.ts | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/packages/0x.js/src/utils/exchange_transfer_simulator.ts b/packages/0x.js/src/utils/exchange_transfer_simulator.ts index 9a920c643..f8301f5c2 100644 --- a/packages/0x.js/src/utils/exchange_transfer_simulator.ts +++ b/packages/0x.js/src/utils/exchange_transfer_simulator.ts @@ -5,6 +5,7 @@ import * as _ from 'lodash'; import { TokenWrapper } from '../contract_wrappers/token_wrapper'; import { BalanceAndProxyAllowanceLazyStore } from '../stores/balance_proxy_allowance_lazy_store'; import { ExchangeContractErrs, TradeSide, TransferType } from '../types'; +import { constants } from '../utils/constants'; enum FailureReason { Balance = 'balance', @@ -66,6 +67,13 @@ export class ExchangeTransferSimulator { tradeSide: TradeSide, transferType: TransferType, ): Promise<void> { + // HACK: When simulating an open order (e.g taker is NULL_ADDRESS), we don't want to adjust balances/ + // allowances for the taker. We do however, want to increase the balance of the maker since the maker + // might be relying on those funds to fill subsequent orders or pay the order's fees. + if (from === constants.NULL_ADDRESS && tradeSide === TradeSide.Taker) { + await this._increaseBalanceAsync(tokenAddress, to, amountInBaseUnits); + return; + } const balance = await this._store.getBalanceAsync(tokenAddress, from); const proxyAllowance = await this._store.getProxyAllowanceAsync(tokenAddress, from); if (proxyAllowance.lessThan(amountInBaseUnits)) { |