Currently, I try to send Wrapped ETH from my account to a contract address by using IERC20. But it returned an error on Remix. By the way, I could call token.balanceOf(msg.sender) but can’t execute token.transferFrom(msg.sender, address(this), amount) somehow. :computer: Environment Remix IDE …

Hi @wat , Welcome to the community :wave: Have you approved an allowance for the Test2 contract for the amount that of WETH that you want to send? See the following example: Example on how to use ERC20 token in another contract

How to transfer an external ERC20 token with IERC20?

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abcoathup October 26, 2020, 8:36am 4

Hi @wat,

Great to hear. If you have a moment it would be nice if you could introduce yourself to the community.

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How to transfer an external ERC20 token with IERC20?

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