ecSignHashAsync() 給出 INVALID_SIGNATURE 錯誤

我正在嘗試在 0x 中創建訂單，但是當我嘗試簽署訂單時INVALID_SIGNATURE出現錯誤？

我正在使用 0x 版本 2

onSubmit = async (event) => {

   event.preventDefault();

   const { makerAmount, takerAmount, makerToken, takerToken, maker } = this.state;
   const contractAddresses = getContractAddressesForNetworkOrThrow(KOVAN_NETWORK_ID);
   const zrxTokenAddress = contractAddresses.zrxToken;
   const etherTokenAddress = contractAddresses.etherToken
   const contractWrappers = new ContractWrappers(web3Wrapper._provider, { networkId: KOVAN_NETWORK_ID });

   const makerZRXApprovalTxHash = await contractWrappers.erc20Token.setUnlimitedProxyAllowanceAsync(
       zrxTokenAddress,
       maker,
   );

   const makerAssetAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(makerAmount), DECIMALS);

   // the amount the maker wants of taker asset
   const takerAssetAmount = Web3Wrapper.toBaseUnitAmount(new BigNumber(takerAmount), DECIMALS);

   // 0x v2 uses hex encoded asset data strings to encode all the information needed to identify an asset
   const makerAssetData = assetDataUtils.encodeERC20AssetData(zrxTokenAddress);
   const takerAssetData = assetDataUtils.encodeERC20AssetData(etherTokenAddress);

   // Set up the Order and fill it
   const randomExpiration = getRandomFutureDateInSeconds();
   const exchangeAddress = contractAddresses.exchange;

   // Create the order
   const order = {
       exchangeAddress,
       makerAddress: maker,
       takerAddress: NULL_ADDRESS,
       senderAddress: NULL_ADDRESS,
       feeRecipientAddress: NULL_ADDRESS,
       expirationTimeSeconds: randomExpiration,
       salt: generatePseudoRandomSalt(),
       makerAssetAmount,
       takerAssetAmount,
       makerAssetData,
       takerAssetData,
       makerFee: ZERO,
       takerFee: ZERO,
   };

   // Generate the order hash and sign it
   const orderHashHex = orderHashUtils.getOrderHashHex(order);

   console.log(orderHashHex);
   console.log(maker);
   console.log(web3Wrapper._provider);

   const signature = await signatureUtils.ecSignHashAsync(web3Wrapper._provider, orderHashHex, maker);
   const signedOrder = { ...order, signature };

   const uuidv1 = require('uuid/v1');
   const session = driver.session();
   await session.run(
       'CREATE (a:Order {id:$id, maker:$maker, makerAmount: $makerAmount, takerAmount:$takerAmount, makerToken:$makerToken, takerToken:$takerToken})',
       { id: uuidv1(), maker: maker, makerAmount: makerAmount, takerAmount: takerAmount, makerToken: makerToken, takerToken: takerToken, signedOrder: signedOrder }
   );
   session.close();
   this.setState({ errorMessage: '', makerAmount: 0, takerAmount: 0, makerToken: 'zrx', takerToken: 'weth' });
};

問題出在 0x 提供程序上，我應該使用 MetamaskSubprovider 而不是 signerprovider

引用自：https://ethereum.stackexchange.com/questions/62175