BigNumber错误:新的BigNumber()不是一个基数16的数字：

Question

我对Ethereum和javascript很陌生，所以希望有人能帮我解决这个问题，因为BigNumber上的其他任何一个答案都不能帮助我理解为什么这对我不起作用。我试过用BigNumber.js将数字转换为大数，但它告诉我它不再是数字了？！

CreateNewProject函数运行良好(除了它两次调用元问询之外，这是一个单独的问题(请您也回答这个问题)。目前的主要问题是bigNumber和getProject函数。

我的聪明合同是

struct Project {
    address projectOwner;
    uint projectID;
    string projectName;
    uint goal;
    uint pledged;
    uint totalPledges;
    mapping(uint => Pledge) pledges;
}

struct Pledge {
    address pledge;
    uint pledged;
}


uint projectCounter = 1;
mapping(uint => Project) projectsList;


function CreateProject(string calldata _projectName, uint _goal) external returns (uint projectID){
    projectID = projectCounter;
    projectsList[projectID] = Project(msg.sender, projectID, _projectName, _goal, 0, 0);
    projectCounter++;
}


//This will return the details of a specified project by projectID
function getProject(uint _projectID) public view returns (address projectOwner, string memory projectName, uint goal, uint pledged) {
    require(projectCounter > 0, "No Projects Exist");
    Project memory p = projectsList[_projectID];

    return (p.projectOwner, p.projectName, p.goal, p.pledged);
}

我的web3 js函数可以与以下功能交互：

function CreateNewProject() {

    var projectName = document.getElementById("ProjectName").value;
    var projectGoal = document.getElementById("ProjectGoal").value;
    web3.eth.sendTransaction(
    ProjectContractInstance.CreateProject(projectName, projectGoal, function(error, result) {
        if (!error) {
            console.log(JSON.stringify(result));
            document.getElementById("test1").innerHTML = "Project created!  Your project number is ";
            console.log(JSON.stringify("a" + a));
        } else {
            console.log(error);
            console.log("error happened");
        }
    }));

}

function GetProject() {

    const BigNumber = require('bignumber.js');

    // Set DECIMAL_PLACES for the original BigNumber constructor
    BigNumber.set({ DECIMAL_PLACES: 16 })
    let x = new BigNumber(1);

    var b = ProjectContractInstance.getProject(x ,function(error, result) {
        if(!error) {
            console.log(JSON.stringify(result));
            console.log("no error");
        } else {
            console.log(error);

            console.log("error occurred");
        }
    })
}

我不明白为什么还会这样：

BigNumber Error: new BigNumber() not a base 16 number: 
at T (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:289033)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:294599
at new r (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:286552)
at i.formatOutputString [as _outputFormatter] (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:171979)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:176324
at i.decode (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:176346)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:169300
at Array.map (<anonymous>)
at d.decodeParams (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:169273)
at u.unpackOutput (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:199674)

当我使用以下方法将其更改为基础16时：

var hexString = (11).toString(16);

然后将hexString传递到函数中：

 function getProject() {

    const BigNumber = require('bignumber.js');

    // Set DECIMAL_PLACES for the original BigNumber constructor
    BigNumber.set({ DECIMAL_PLACES: 16 })
    let x = new BigNumber(1);

    var b = ProjectContractInstance.getProject(hexString ,function(error, result) {
        if(!error) {
            console.log(JSON.stringify(result));
            console.log("no error");
        } else {
            console.log(error);

            console.log("error occurred");
        }
    })
}

inpage.js:1 Uncaught BigNumber Error: new BigNumber() not a number: b
at T (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:289033)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:294599
at new r (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:286959)
at new r (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:286391)
at h (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:179632)
at Object.toTwosComplement (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:181223)
at i.a [as _inputFormatter] (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:170396)
at i.encode (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:175604)
at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/inpage.js:1:168053
at Array.map (<anonymous>)

因此，基本上，第一个错误告诉我，我正在传递的数字不是基数16，当我将它更改为基数16时，它告诉我它不再是一个数字！(不，这是现在的巫术要求)！在我失去理智之前，谁能帮我理解这一点？

正如我已经说过的，如果我在浏览器上创建了一个新项目，这是很好的，我可以从Remix运行getProject来显示我通过web3函数创建的项目，但是我不能返回这个项目。救命啊！

Answer 1

我不确定，也不能测试，但如果我是你，我会尝试做一个result.toNumber()

编辑:对于两个Metamask，我建议您在调用契约函数时删除web3.eth.sendTransaction，封装web3的使用。我想说的是，您正在尝试发送一个事务的合同函数调用。打电话给合同函数。

Edit2:您使用回调调用契约函数，因此它是异步的。结果是回调，而不是返回。您可以进入回调地狱，也可以使用异步/等待语法，如: var b=等待ProjectContractInstance.getProject(1)；