[Ethereum] TypeError: Cannot read property ‘fromWei’ of undefined

web3js

My below code is working fine

Web3 = Require('web3');
const walletAddress = '0x8690F1feff62008A396B31c2C3f380bD0Ca6d8b8';
const web3 = new Web3(new Web3.providers.HttpProvider(testnet));
var balance = web3.eth.getBalance(walletAddress); //Will give value in.
balance = web3.toDecimal(balance);

But when I run:

web3.utils.fromWei(balance,'ether')

It throws an error:

"TypeError: Cannot read property 'fromWei' of undefined"

I am using Web3 0.19.1 and node 10.15.1.

Best Answer

With web3.js v0.x, use web3.fromWei.

With web3.js v1.x, use web3.utils.fromWei.

Related Solutions

[Ethereum] web3.eth.pendingTransactions undefined error

web3.eth.pendingTransactions seems to be a Geth internal addition, I do not see it in the JSON-RPC or Web3 standard.

You are probably better off using this:

web3.eth.getBlock(
    "pending",
    function (error, block) {
        if (error) {
            console.error(error);
        } else {
            console.log(block.transactions.length); 
        }
    });

Web3.js – Getting MetaMask Account’s Balance Using fromWei

Apparently, this is not the same inside the anonymous callback function you're passing to getBalance. Try replacing it with a fat arrow function, that binds the outer this value to the inner scope.

this.web3.eth.getBalance(this.account, (err, balance) => {
  this.balance = this.web3.fromWei(balance, "ether") + " ETH"
});

Best Answer

Related Solutions

[Ethereum] web3.eth.pendingTransactions undefined error

Web3.js – Getting MetaMask Account’s Balance Using fromWei

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