New answers tagged

2

The original use case from back 2016 is that back in a day, smart contracts had no way to interact to incoming token transfer. (This has been now fixed with ERC-777 token standard and send()). For you to interact with a smart contract with an ERC-20 token You need to approve() amount of tokens on a smart contract address You call a smart function that then ...


Top 50 recent answers are included