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-rw-r--r--src/contract_wrappers/exchange_wrapper.ts16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/contract_wrappers/exchange_wrapper.ts b/src/contract_wrappers/exchange_wrapper.ts
index 3fb187de2..fe5fc3d78 100644
--- a/src/contract_wrappers/exchange_wrapper.ts
+++ b/src/contract_wrappers/exchange_wrapper.ts
@@ -154,6 +154,10 @@ export class ExchangeWrapper extends ContractWrapper {
if (fillMakerAmountInBaseUnits.greaterThan(makerAllowance)) {
throw new Error(FillOrderValidationErrs.NOT_ENOUGH_MAKER_ALLOWANCE);
}
+ if (await this.isRoundingErrorAsync(signedOrder.takerTokenAmount, fillTakerAmountInBaseUnits,
+ signedOrder.makerTokenAmount)) {
+ throw new Error(FillOrderValidationErrs.ROUNDING_ERROR);
+ }
}
private throwErrorLogsAsErrors(logs: ContractEvent[]): void {
const errEvent = _.find(logs, {event: 'LogError'});
@@ -163,6 +167,18 @@ export class ExchangeWrapper extends ContractWrapper {
throw new Error(errMessage);
}
}
+ private async isRoundingErrorAsync(takerTokenAmount: BigNumber.BigNumber,
+ fillTakerAmountInBaseUnits: BigNumber.BigNumber,
+ makerTokenAmount: BigNumber.BigNumber): Promise<boolean> {
+ const exchangeInstance = await this.getExchangeContractAsync();
+ const senderAddress = await this.web3Wrapper.getSenderAddressOrThrowAsync();
+ const isRoundingError = await exchangeInstance.isRoundingError.call(
+ takerTokenAmount, fillTakerAmountInBaseUnits, makerTokenAmount, {
+ from: senderAddress,
+ },
+ );
+ return isRoundingError;
+ }
private async getExchangeContractAsync(): Promise<ExchangeContract> {
if (!_.isUndefined(this.exchangeContractIfExists)) {
return this.exchangeContractIfExists;