郑州区块链公司开发

pragma solidity ^0.8.0;

contract SimpleTransaction {
    struct Transaction {
        address sender;
        address receiver;
        uint amount;
        bool completed;
    }

    Transaction[] public transactions;

    function addTransaction(address _receiver, uint _amount) public {
        transactions.push(Transaction(msg.sender, _receiver, _amount, false));
    }

    function completeTransaction(uint _index) public {
        require(_index < transactions.length, "Invalid index");
        transactions[_index].completed = true;
    }

    function getTransaction(uint _index) public view returns (address, address, uint, bool) {
        require(_index < transactions.length, "Invalid index");
        Transaction memory t = transactions[_index];
        return (t.sender, t.receiver, t.amount, t.completed);
    }
}