Add basic virtual machine concept
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Ladd Hoffman
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import { Action } from './action.js';
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class ContractRecord {
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constructor(id, instance) {
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this.id = id;
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this.instance = instance;
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}
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}
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export class VMHandle {
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constructor(vm, sender) {
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this.vm = vm;
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this.sender = sender;
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this.actions = {
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call: new Action('call'),
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};
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}
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/**
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* @param {string} id Contract ID
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* @param {string} method
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*/
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callContract(id, method, ...args) {
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const instance = this.vm.getContractInstance(id);
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const fn = instance[method];
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if (!fn) throw new Error(`Contract ${id} method ${method} not found!`);
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this.actions.call.log(this.sender, instance, method);
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return fn.call(instance, this.sender, ...args);
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}
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}
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export class VM {
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constructor() {
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this.contracts = new Map();
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}
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/**
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* @param {string} id
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* @param {class} ContractClass
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* @param {any[]} ...args Passed to contractClass constructor after `vm`
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*/
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addContract(id, ContractClass, ...args) {
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const instance = new ContractClass(this, ...args);
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const contract = new ContractRecord(id, instance);
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this.contracts.set(id, contract);
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}
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getHandle(sender) {
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return new VMHandle(this, sender);
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}
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/**
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* @param {string} id
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*/
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getContract(id) {
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return this.contracts.get(id);
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}
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/**
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* @param {string} id
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*/
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getContractInstance(id) {
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return this.getContract(id)?.instance;
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}
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}
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@ -24,8 +24,8 @@
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</ul>
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</ul>
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<ul>
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<ul>
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<li><a href="./tests/forum-network.test.html">Forum Network</a></li>
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<li><a href="./tests/forum-network.test.html">Forum Network</a></li>
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<li><a href="./tests/vm.test.html">VM</a></li>
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</ul>
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</ul>
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<h3>Tertiary</h3>
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<ul>
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<ul>
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<li><a href="./tests/basic.test.html">Basic Sequencing</a></li>
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<li><a href="./tests/basic.test.html">Basic Sequencing</a></li>
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<li><a href="./tests/wdag.test.html">WDAG</a></li>
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<li><a href="./tests/wdag.test.html">WDAG</a></li>
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import { Actor } from '../../classes/actor.js';
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import { Box } from '../../classes/box.js';
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import { Scene } from '../../classes/scene.js';
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import { VM } from '../../classes/vm.js';
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const rootElement = document.getElementById('scene');
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const rootBox = new Box('rootBox', rootElement).flex();
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window.scene = new Scene('VM test', rootBox).withSequenceDiagram();
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const testContractId = 'test-contract-id';
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class TestContract extends Actor {
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constructor(vm, value) {
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super('TestContract');
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this.vm = vm;
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this.value = value;
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}
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hello(sender) {
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return `${sender.name} ${this.value}`;
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}
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}
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describe('VM', () => {
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let vm;
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let sender;
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let vmHandle;
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before(() => {
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vm = (window.vm = new VM());
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sender = new Actor('Sender');
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vm.addContract(testContractId, TestContract, 'world');
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vmHandle = vm.getHandle(sender);
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});
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it('Should exist', () => {
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should.exist(vm);
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});
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it('Call a contract method', () => {
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vmHandle.callContract(testContractId, 'hello').should.equal('Sender world');
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});
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});
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@ -0,0 +1,32 @@
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<!DOCTYPE html>
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<head>
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<title>VM</title>
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<link rel="stylesheet" href="https://unpkg.com/mocha/mocha.css" />
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<link type="text/css" rel="stylesheet" href="../index.css" />
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</head>
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<body>
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<h2><a href="../">DGF Tests</a></h2>
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<div id="mocha"></div>
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<div id="scene"></div>
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</body>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/radash/10.7.0/radash.js"
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integrity="sha512-S207zKWG3iqXqe6msO7/Mr8X3DzzF4u8meFlokHjGtBPTGUhgzVo0lpcqEy0GoiMUdcoct+H+SqzoLsxXbynzg=="
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crossorigin="anonymous" referrerpolicy="no-referrer"></script>
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<script src="https://unpkg.com/mocha/mocha.js"></script>
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<script src="https://unpkg.com/chai/chai.js"></script>
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<script type="module" src="./scripts/vm.test.js"></script>
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<script defer class="mocha-init">
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mocha.setup({
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ui: 'bdd',
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globals: ['vm', '__REACT_DEVTOOLS_*'],
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});
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mocha.checkLeaks();
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window.should = chai.should();
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</script>
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<script defer class="mocha-exec">
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// TODO: Weird race condition -- resolve this in a better way
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setTimeout(() => mocha.run(), 1000);
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</script>
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