如何将解析的 ABI 的功能传递给 MetaMask？

Question

我正在开发一个解析 ABI 的 dApp，然后它会显示它的函数和每个函数变量的字段，我想将函数及其变量发送到 MetaMask 以进行交易。

我有一个完全 JS、web3.js 客户端网络 dApp。

const fntype = document.getElementById("function-name").value;
var counter = $('.validate').length
var NumOfValidates = counter-1;
  //A JS array that it will be filled with all the inputs the user give for each function's variable in order
var variables = [];
var id = 0;
for (var i = 0; i < NumOfValidates; ++i) {
    id = id+1;
    variables.push(document.getElementById("i"+id).value);
    console.log("variable["+i+"] = "+variables[i]);  
 }

//SendToMetaMask

 miniToken.fntype(variables[1],{ from: address, value: '0'})

 .then(function (txHash) {
    console.log('Transaction sent')
    console.dir(txHash)
    waitForTxToBeMined(txHash)
})

预期：将函数传递给 MetaMask 以完成交易

实际：我收到以下错误

Uncaught TypeError: Cannot read property 'fntype' of undefined

at senddata2 (script.js:234)

at HTMLAnchorElement.onclick ((index):110)

senddata2 @ script.js:234

onclick @ (index):110

Answer 1

合约未正确初始化。因此出现错误Cannot read property 'fntype' of undefined。

var miniToken = web3.eth.Contract(abi, address) //web3js@1.0
var miniToken = web3.eth.contract(abi).at(address) //web3js@0.20

在这之后你可以做

miniToken.fntype(variables[1],{ from: address, value: '0'})