MetaMask – Can MetaMask Be Used for All ERC20 Tokens?

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How can I use WETH with Metamask wallet?
I can see ETH in my Metamask (Rinkeby TestNet, it works on Mainnet) but can not use other tokens.
Any Repository or lead will be appreciated.
If yes, What will be token Contract address it asks for?
Also, How can ether.js/web3.js be used to find WETH balance of wallet address?

Best Answer

All ERC20 tokens are fully supported in Metamask, and WETH is an ERC20 token. The tricky thing is that you have to manually add the tokens, since otherwise Metamask doesn't know which tokens you have.

The extra tricky part with WETH is that there are numerous versions of the WETH token contract, in different addresses. I'm not 100% sure, but I think the version Uniswap uses is the most popular. Basically you have to check the projects you are interested in, to see which version they use. Here are the WETH addresses for different networks which Uniswap uses: https://docs.uniswap.org/protocol/reference/deployments (scroll down).

To use ethers.js to get a token balance, check for example here: How to get the ERC-20 token balance of an account using etherjs? or https://stackoverflow.com/questions/71106843/check-balance-of-erc20-token-in-hardhat-using-ethers-js

Related Solutions

[Ethereum] use ether.js with truffle

Truffle use Web3 by default and its injected inside as global dependency. You can't get rid of it, but you can install ether.js as dependency on your project.

truffle init

then you install your module

npm install --save ethers

and eventually you use it in your truffle tests

var ethers = require('ethers');

you can use the ethers library into your tests and then execute with truffle test command.

Consider that you wouldn't have the library if you use truffle develop, since only web3 would be injected.

ERC20 Tokens – How Metamask Sends ERC20 Tokens Without ABI

Metamask uses internally a simple ERC20 compatible ABI, defined on the basis of the standard. As you may know, any

function transfer(address, uint)

is described by the same ABI element for any possible contract existing incorporating it, being it (the ABI element) nothing more that an hashed description of the call name and of the parameters type.

So if you suppose that the contract to connect with has, at least, one transfer, one balanceOf, one approve, one transferFrom and so on, you can write down a usable ABI that shall give you access to those functions in the contract without hassle.

Of course you shall not be able to access any other function existing in the specific contract that you did not described in advance using that approach.

Best Answer

Related Solutions

[Ethereum] use ether.js with truffle

ERC20 Tokens – How Metamask Sends ERC20 Tokens Without ABI

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