估算凯伯'贸易'合约功能的天然气时，出现“返回的错误：需要的天然气超过配额123965250或交易始终失败”

如何解决估算凯伯'贸易'合约功能的天然气时，出现“返回的错误：需要的天然气超过配额123965250或交易始终失败”

我正在通过在Kyber交换合约的.estimateGas()函数上调用trade来估算汽油量。

    async getGas(inputToken: TokenInfo,outputToken: TokenInfo,walletAddress: string,amountInWei = Utils.toWei(1),minRate: BN) {
        if (amountInWei.lt(toBN(1000))) throw `{${this.name}}.getGas(): The amount ${amountInWei} must be >= 1000.`;

        var contract = this.getContract();
        let ethValue = inputToken.isETH ? amountInWei: Utils.ZERO_BN;
        var tx: ContractSendMethod = contract.methods.trade(inputToken.contractAddress,amountInWei,outputToken.contractAddress,walletAddress,MAX_ALLOWANCE,minRate,Utils.ZERO_ADDRESS); //Utils.getWalletAddress()
        
        debugger;
        var gas = await tx.estimateGas({ from: walletAddress,gas: 10000000000,value: ethValue }); // FAILS HERE
        debugger;
        return toBN(gas);
    }

我尝试了estimateGas()，不带参数，但带参数（如上所示）。然后，我在文档中发现您可能必须先致电ERC20合同上的approve，所以我也做了（摘自文档并进行修改以适合）：

async checkAndApproveTokenForTrade(srcToken: TokenInfo,userAddress: string,srcQty: BN) {
        if (!srcToken.abi || srcToken.contractAddress == Tokens.ETH.contractAddress)
            return;
        
        // check existing allowance given to proxy contract
        var srcTokenContract = srcToken.contract;
        let existingAllowance = toBN(await srcTokenContract.methods.allowance(userAddress,KyberExchange.KYBER_RATE_ADDRESS/*IKyberNetworkProxy_ADDRESS*/).call());

        // if zero allowance,just set to MAX_UINT256
        if (existingAllowance.eq(Utils.ZERO_BN)) {
            console.log("Approving KNP contract to max allowance.");
            var result = await srcTokenContract.methods.approve(KyberExchange.KYBER_RATE_ADDRESS,srcQty).call();
        } else if (existingAllowance.lt(srcQty)) {
            // if existing allowance is insufficient,reset to zero,then set to MAX_UINT256
            console.log("Approving KNP contract to zero,then max allowance.");
            result = await srcTokenContract.methods.approve(KyberExchange.KYBER_RATE_ADDRESS,Utils.ZERO_BN).call();
            result = await srcTokenContract.methods.approve(KyberExchange.KYBER_RATE_ADDRESS,srcQty).call();
        }
    }

    async getGas(inputToken: TokenInfo,minRate: BN) {
        if (amountInWei.lt(toBN(1000))) throw `{${this.name}}.getGas(): The amount ${amountInWei} must be >= 1000.`;

        await this.checkAndApproveTokenForTrade(inputToken,amountInWei);

        var contract = this.getContract();
        let ethValue = inputToken.isETH ? amountInWei: Utils.ZERO_BN;
        var tx: ContractSendMethod = contract.methods.trade(inputToken.contractAddress,Utils.ZERO_ADDRESS); //Utils.getWalletAddress()
        var gas = await tx.estimateGas({ from: walletAddress,value: ethValue }); // STILL FAILS
        return toBN(gas);
    }

这些是执行时的事务args：

• 1-一个=“ 34950159783737063”的BN
• 5-一个=“ 2762660877769768”的BN

我不断收到“返回的错误：所需的气体超出限额（123965250）或交易始终失败。”。我已经没办法解决这个问题了。我希望该错误能够更准确地说明问题所在。我在想函数本身很可能引发错误，但不知道是什么或为什么。我可以打电话给交换合约以获取汇率，因此系统的其余部分都可以正常工作，而不仅仅是估算天然气的部分。