In React, I use a Web3js call function to get a value. The returned value is in Wei. However, I want to render it in Ethers. What would be the best way to do it?
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5 Answers
I think you're looking for fromWei. In web3.js 0.2x.x:
web3.fromWei(n, 'ether')
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Thanks for the answer. For some reason, I'm getting "Cannot read property 'fromWei' of null"– RuhamMar 5, 2018 at 6:04
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No, the function returning Wei works. I imported Web3 from 'web3', and set a current provider.– RuhamMar 5, 2018 at 6:09
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let web3 = new Web3(Web3.currentProvider) after which {web3.fromWei(price, 'ether')}– RuhamMar 5, 2018 at 6:10
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web3.utils.fromWei(yourValue, 'ether')
^^^ You must use the utils library. If you're getting the weird, TypeError: web3.fromWei is not a function and you're trying to console log the output, try setting the function call to a constant and then console logging that constant. Like so...
yourValue = returned amount of ether
returnValue = web3.utils.fromWei(yourValue, 'ether')
console.log(returnValue)
answered Dec 3, 2018 at 10:30
You have
web3.utils.fromWei('1', 'ether');
This results in the following: 0.000000000000000001
This assumes that your parameter is 1 wei and you want to convert it to ether.
You can also do it the other way around
web3.utils.toWei('1', 'ether');
This results in the following: 1000000000000000000
This assumes that your parameter is 1 ether and you want to convert it to wei
In both cases the second parameter is optional and defaults to "ether".
You can use all available ETH units as second parameter (e.g. gwei, shannon, szabo, etc.).
For more information you can check the official documentation
Fetch Balance in eth complete syntax.
{
var web3 = new Web3(window.ethereum);
await window.ethereum.send("eth_requestAccounts");
var accounts = await web3.eth.getAccounts();
var account = accounts[0];
var balance = await web3.eth.getBalance(account);
var amount = await web3.utils.fromWei(balance);
console.log(amount);
}
