intro

First of all, if you can, thank you for following me on Twitter

https://twitter.com/0xblackecn

What are the benefits of direct contract invocation? For the simplest example, when the airdrop comes down, the official website can not open the page, but at this time we can go directly to the contract, directly use the smart contract call, faster

Many people know how to call open source contracts, and the steps are simple

① Open etherscan

② Search the contract address

③ Click “Contract” and click “write Contract”

④ Link the wallet, and then call the method

However, for closed source contracts, we can not use this method to operate, because on closed source contracts, we can not directly link the wallet and click on the operation

So I’m going to write a closed source contract call tutorial

For the closed-source contract call, I summed up is: guess the parameters, as long as the parameters are guessed, then the call is simple