diff --git a/forum-network/src/classes/vm.js b/forum-network/src/classes/vm.js
new file mode 100644
index 0000000..ee6f1a6
--- /dev/null
+++ b/forum-network/src/classes/vm.js
@@ -0,0 +1,65 @@
+import { Action } from './action.js';
+
+class ContractRecord {
+ constructor(id, instance) {
+ this.id = id;
+ this.instance = instance;
+ }
+}
+
+export class VMHandle {
+ constructor(vm, sender) {
+ this.vm = vm;
+ this.sender = sender;
+ this.actions = {
+ call: new Action('call'),
+ };
+ }
+
+ /**
+ * @param {string} id Contract ID
+ * @param {string} method
+ */
+ callContract(id, method, ...args) {
+ const instance = this.vm.getContractInstance(id);
+ const fn = instance[method];
+ if (!fn) throw new Error(`Contract ${id} method ${method} not found!`);
+ this.actions.call.log(this.sender, instance, method);
+ return fn.call(instance, this.sender, ...args);
+ }
+}
+
+export class VM {
+ constructor() {
+ this.contracts = new Map();
+ }
+
+ /**
+ * @param {string} id
+ * @param {class} ContractClass
+ * @param {any[]} ...args Passed to contractClass constructor after `vm`
+ */
+ addContract(id, ContractClass, ...args) {
+ const instance = new ContractClass(this, ...args);
+ const contract = new ContractRecord(id, instance);
+ this.contracts.set(id, contract);
+ }
+
+ getHandle(sender) {
+ return new VMHandle(this, sender);
+ }
+
+ /**
+ * @param {string} id
+ */
+ getContract(id) {
+ return this.contracts.get(id);
+ }
+
+ /**
+ * @param {string} id
+ */
+ getContractInstance(id) {
+ return this.getContract(id)?.instance;
+ }
+}
diff --git a/forum-network/src/index.html b/forum-network/src/index.html
index 0051aba..7f6fa7b 100644
--- a/forum-network/src/index.html
+++ b/forum-network/src/index.html
@@ -24,8 +24,8 @@
- Tertiary
- Basic Sequencing
- WDAG
diff --git a/forum-network/src/tests/scripts/vm.test.js b/forum-network/src/tests/scripts/vm.test.js
new file mode 100644
index 0000000..69e4c8d
--- /dev/null
+++ b/forum-network/src/tests/scripts/vm.test.js
@@ -0,0 +1,42 @@
+import { Actor } from '../../classes/actor.js';
+import { Box } from '../../classes/box.js';
+import { Scene } from '../../classes/scene.js';
+import { VM } from '../../classes/vm.js';
+
+const rootElement = document.getElementById('scene');
+const rootBox = new Box('rootBox', rootElement).flex();
+window.scene = new Scene('VM test', rootBox).withSequenceDiagram();
+
+const testContractId = 'test-contract-id';
+class TestContract extends Actor {
+ constructor(vm, value) {
+ super('TestContract');
+ this.vm = vm;
+ this.value = value;
+ }
+
+ hello(sender) {
+ return `${sender.name} ${this.value}`;
+ }
+}
+
+describe('VM', () => {
+ let vm;
+ let sender;
+ let vmHandle;
+
+ before(() => {
+ vm = (window.vm = new VM());
+ sender = new Actor('Sender');
+ vm.addContract(testContractId, TestContract, 'world');
+ vmHandle = vm.getHandle(sender);
+ });
+
+ it('Should exist', () => {
+ should.exist(vm);
+ });
+
+ it('Call a contract method', () => {
+ vmHandle.callContract(testContractId, 'hello').should.equal('Sender world');
+ });
+});
diff --git a/forum-network/src/tests/vm.test.html b/forum-network/src/tests/vm.test.html
new file mode 100644
index 0000000..8aeff12
--- /dev/null
+++ b/forum-network/src/tests/vm.test.html
@@ -0,0 +1,32 @@
+
+
+
+ VM
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+