itays

// based on different implementations from this thread https://gist.github.com/mudge/5830382

export type Listener = (...args: any[]) => void;
export type Events = Record<string, Set<Listener>>;
class EventEmitter {
    private events: Events = {};

    on(event: string, listener: Listener) {
        if (typeof this.events[event] !== "object") {
            this.events[event] = new Set();

itays

pragma solidity ^0.4.17;

contract Inbox {
    string public message;
    
    function Inbox(string initialMessage) public {
        message = initialMessage;
    }
    
    function setMessage(string newMessage) public {