How to initialize a static string array in solidity?

Question

I want to declare an array to store my strings as follows.

bytes32[3] verifiedResult;
verifiedResult = ["verified successfully", "verified failed", "not clear"];

Error shows that

ParserError: Expected identifier but got '=' --> contracts/1_Storage.sol:23:20: | 23 | verifiedResult = ["verified_successfully", "verified_failed", "not clear"] |^

what should I do to fix it? Is there any better way to declare a static string array in solidity?

Answer 1

You can use the string keyword, or in your case, a fixed-sized (3) array of strings.

pragma solidity ^0.8.4;

contract MyContract {
    // string in storage
    string[3] verifiedResult = ["verified successfully", "verified failed", "not clear"];
    
    function foo() external {
        // string in memory
        string[3] memory anotherStringArray = ["verified successfully", "verified failed", "not clear"];
    }
}

---

Also, your copy looks like you can use enum.

pragma solidity ^0.8.4;

contract MyContract {
    enum VerifiedResult {VerifiedSuccessfully, VerifiedFailed, NotClear}
    
    VerifiedResult result;
    
    function foo() external {
        result = VerifiedResult.NotClear; // stores `NotClear` to the `result` property
    }
}