Certainly! Here's the updated README:
A simple message escrow application that manages the secure sending and receipt confirmation of messages between two parties.
This program is a simple message escrow application that simulates a secure messaging system where a sender can send a message, and the receiver can confirm its receipt.
To run the program, you can use Remix, an online Solidity IDE. Here's the step-by-step instruction on how to make this work:
- Go to Remix: Remix IDE
- Create a new file in Remix and copy the code from the
main.solfile (provided below). - Compile the code with the compiler set to version 0.8.4.
- Deploy and run the code.
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0;
contract MessageEscrow {
enum State { NONE, AWAITING_MESSAGE, AWAITING_CONFIRMATION, COMPLETE }
address public sender;
address public receiver;
State public currentState;
address public owner;
string public message;
modifier onlySender() {
require(msg.sender == sender, "Only the sender can call this function");
_;
}
modifier onlyReceiver() {
require(msg.sender == receiver, "Only the receiver can call this function");
_;
}
modifier inState(State expectedState) {
require(currentState == expectedState, "Invalid state");
_;
}
constructor(address _sender, address _receiver) {
sender = _sender;
receiver = _receiver;
currentState = State.AWAITING_MESSAGE;
owner = msg.sender;
}
function sendMessage(string memory _message) public onlySender inState(State.AWAITING_MESSAGE) {
require(bytes(_message).length > 0, "Message must be non-empty");
message = _message;
currentState = State.AWAITING_CONFIRMATION;
assert(bytes(message).length > 0);
assert(currentState == State.AWAITING_CONFIRMATION);
}
function confirmReceipt() public onlyReceiver inState(State.AWAITING_CONFIRMATION) {
currentState = State.COMPLETE;
assert(currentState == State.COMPLETE);
}
function resetEscrow() public {
if (msg.sender != owner) {
revert("Only the owner can reset the escrow");
}
message = "";
currentState = State.AWAITING_MESSAGE;
}
}Renz Angelo Aguirre
This project is licensed under the MIT License - see the LICENSE.md file for details.
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