feat: environment getters

yarn-project/acir-simulator/src/avm/fixtures/index.ts

@@ -57,3 +57,25 @@ export function initExecutionEnvironment(overrides?: AvmExecutionEnvironmentOver
     overrides?.calldata ?? [],
   );
 }
+
+/**
+ * An interface that allows to override the default values of the GlobalVariables
+ */
+export interface GlobalVariablesOverrides {
+  chainId?: Fr;
+  version?: Fr;
+  blockNumber?: Fr;
+  timestamp?: Fr;
+}
+
+/**
+ * Create an empty instance of the Execution Environment where all values are zero, unless overriden in the overrides object
+ */
+export function initGlobalVariables(overrides?: GlobalVariablesOverrides): GlobalVariables {
+  return new GlobalVariables(
+    overrides?.chainId ?? Fr.zero(),
+    overrides?.version ?? Fr.zero(),
+    overrides?.blockNumber ?? Fr.zero(),
+    overrides?.timestamp ?? Fr.zero(),
+  );
+}

yarn-project/acir-simulator/src/avm/opcodes/environment_getters.test.ts

@@ -0,0 +1,111 @@
+import { Fr } from '@aztec/foundation/fields';
+
+import { MockProxy, mock } from 'jest-mock-extended';
+
+import { AvmMachineState } from '../avm_machine_state.js';
+import { initExecutionEnvironment, initGlobalVariables } from '../fixtures/index.js';
+import { AvmJournal } from '../journal/journal.js';
+import {
+  Address,
+  BlockNumber,
+  ChainId,
+  FeePerDAGas,
+  FeePerL1Gas,
+  FeePerL2Gas,
+  Origin,
+  Portal,
+  Sender,
+  StorageAddress,
+  Timestamp,
+  Version,
+} from './environment_getters.js';
+
+describe('Environment getters instructions', () => {
+  let machineState: AvmMachineState;
+  let journal: MockProxy<AvmJournal>;
+
+  beforeEach(async () => {
+    journal = mock<AvmJournal>();
+  });
+
+  type EnvInstruction = Portal | FeePerL1Gas | FeePerL2Gas | FeePerDAGas | Origin | Sender | StorageAddress | Address;
+  const envGetterTest = async (key: string, value: Fr, instruction: EnvInstruction) => {
+    machineState = new AvmMachineState(initExecutionEnvironment({ [key]: value }));
+
+    await instruction.execute(machineState, journal);
+    const actual = machineState.readMemory(0);
+    expect(actual).toEqual(value);
+  };
+
+  it('Should read address correctly', async () => {
+    const address = new Fr(123456n);
+    await envGetterTest('address', address, new Address(0));
+  });
+
+  it('Should read storage address correctly', async () => {
+    const address = new Fr(123456n);
+    await envGetterTest('storageAddress', address, new StorageAddress(0));
+  });
+
+  it('Should read Portal correctly', async () => {
+    const portal = new Fr(123456n);
+    await envGetterTest('portal', portal, new Portal(0));
+  });
+
+  it('Should read FeePerL1Gas correctly', async () => {
+    const feePerL1Gas = new Fr(123456n);
+    await envGetterTest('feePerL1Gas', feePerL1Gas, new FeePerL1Gas(0));
+  });
+
+  it('Should read FeePerL2Gas correctly', async () => {
+    const feePerL2Gas = new Fr(123456n);
+    await envGetterTest('feePerL2Gas', feePerL2Gas, new FeePerL2Gas(0));
+  });
+
+  it('Should read FeePerDAGas correctly', async () => {
+    const feePerDaGas = new Fr(123456n);
+    await envGetterTest('feePerDaGas', feePerDaGas, new FeePerDAGas(0));
+  });
+
+  it('Should read Origin correctly', async () => {
+    const origin = new Fr(123456n);
+    await envGetterTest('origin', origin, new Origin(0));
+  });
+
+  it('Should read Sender correctly', async () => {
+    const sender = new Fr(123456n);
+    await envGetterTest('sender', sender, new Sender(0));
+  });
+
+  describe('Global Variables', () => {
+    type GlobalsInstruction = ChainId | Version | BlockNumber | Timestamp;
+    const readGlobalVariableTest = async (key: string, value: Fr, instruction: GlobalsInstruction) => {
+      const globals = initGlobalVariables({ [key]: value });
+      machineState = new AvmMachineState(initExecutionEnvironment({ globals }));
+
+      await instruction.execute(machineState, journal);
+      const actual = machineState.readMemory(0);
+      expect(actual).toEqual(value);
+    };
+
+    it('Should read chainId', async () => {
+      const chainId = new Fr(123456n);
+      await readGlobalVariableTest('chainId', chainId, new ChainId(0));
+    });
+
+    it('Should read version', async () => {
+      const version = new Fr(123456n);
+      await readGlobalVariableTest('version', version, new Version(0));
+    });
+
+    it('Should read block number', async () => {
+      const blockNumber = new Fr(123456n);
+      await readGlobalVariableTest('blockNumber', blockNumber, new BlockNumber(0));
+    });
+
+    it('Should read timestamp', async () => {
+      const timestamp = new Fr(123456n);
+      await readGlobalVariableTest('timestamp', timestamp, new Timestamp(0));
+    });
+  });
+});