如何在智能合约上存储用户输入？

Question

I am trying to create a smart contract in solidity where I am taking user input from a user which basically is a hash and then I want this hash to be stored on to the smart contract so at the end I could create a function where another user could enter a hash and the program would try to match this hash with the previously stored hash. However, I am not sure how could I store the user's given input on contract?

Answer 1

In Ethereum smart contracts you have state variables which are stored on the blockchain. So to store your hash you can create a bytes32 variable and store your user input hash into it.

Example-:

contract testContract{
   bytes32 public userHashs;

   function userInput(bytes32 _hash)public {
      userHashs = _hash;
   }

}