web 3.0 Session 1

kudos.sol

pragma solidity >=0.7.0 <0.9.0;

contract Kudos {
    mapping (address => Kudo[]) allKudos;  
    function giveKudos(address who, string memory what, string memory  comments) public {
        Kudo memory kudo = Kudo(what, msg.sender, comments);
        allKudos[who].push(kudo);
    }
    function getKudosAtIndex(address who, uint index) public view returns (string memory, address, string memory) {
        Kudo memory kudo = allKudos[who][index];
        return (kudo.what, kudo.giver, kudo.comments);
    }
    function getKudosLength(address who) public view returns (uint) {
        Kudo[] memory kudos = allKudos[who];
        return kudos.length;
    }
}
struct Kudo {
    string what;
    address giver;
    string comments;
}