chore: Report prover metrics (#8155)

Reports a new histogram metric with the time that passes between a block
being submitted and its proof. Uses the timestamp from the L2 block
header global variables as block submission time, and the L1 block time
for the proof submission time.

Depends on #8193 

Fixes #7675

yarn-project/archiver/src/archiver/archiver.test.ts

@@ -10,7 +10,6 @@ import { EthAddress } from '@aztec/foundation/eth-address';
 import { Fr } from '@aztec/foundation/fields';
 import { sleep } from '@aztec/foundation/sleep';
 import { AvailabilityOracleAbi, type InboxAbi, RollupAbi } from '@aztec/l1-artifacts';
-import { NoopTelemetryClient } from '@aztec/telemetry-client/noop';
 
 import { type MockProxy, mock } from 'jest-mock-extended';
 import {
@@ -25,6 +24,7 @@ import {
 
 import { Archiver } from './archiver.js';
 import { type ArchiverDataStore } from './archiver_store.js';
+import { type ArchiverInstrumentation } from './instrumentation.js';
 import { MemoryArchiverStore } from './memory_archiver_store/memory_archiver_store.js';
 
 describe('Archiver', () => {
@@ -35,31 +35,46 @@ describe('Archiver', () => {
   const blockNumbers = [1, 2, 3];
 
   let publicClient: MockProxy<PublicClient<HttpTransport, Chain>>;
+  let instrumentation: MockProxy<ArchiverInstrumentation>;
   let archiverStore: ArchiverDataStore;
   let proverId: Fr;
+  let now: number;
+
+  let archiver: Archiver;
 
   beforeEach(() => {
-    publicClient = mock<PublicClient<HttpTransport, Chain>>();
+    now = +new Date();
+    publicClient = mock<PublicClient<HttpTransport, Chain>>({
+      getBlock: ((args: any) => ({
+        timestamp: args.blockNumber * 1000n + BigInt(now),
+      })) as any,
+    });
+    instrumentation = mock({ isEnabled: () => true });
     archiverStore = new MemoryArchiverStore(1000);
     proverId = Fr.random();
   });
 
+  afterEach(async () => {
+    await archiver?.stop();
+  });
+
   it('can start, sync and stop and handle l1 to l2 messages and logs', async () => {
-    const archiver = new Archiver(
+    archiver = new Archiver(
       publicClient,
       rollupAddress,
       availabilityOracleAddress,
       inboxAddress,
       registryAddress,
       archiverStore,
       1000,
-      new NoopTelemetryClient(),
+      instrumentation,
     );
 
     let latestBlockNum = await archiver.getBlockNumber();
     expect(latestBlockNum).toEqual(0);
 
     const blocks = blockNumbers.map(x => L2Block.random(x, 4, x, x + 1, 2, 2));
+    blocks.forEach((b, i) => (b.header.globalVariables.timestamp = new Fr(now + 1000 * (i + 1))));
     const publishTxs = blocks.map(block => block.body).map(makePublishTx);
     const rollupTxs = blocks.map(makeRollupTx);
 
@@ -157,20 +172,23 @@ describe('Archiver', () => {
     expect((await archiver.getBlocks(1, 100)).map(b => b.number)).toEqual([1, 2, 3]);
     expect((await archiver.getBlocks(1, 100, true)).map(b => b.number)).toEqual([1]);
 
-    await archiver.stop();
+    // Check instrumentation of proven blocks
+    expect(instrumentation.processProofsVerified).toHaveBeenCalledWith([
+      { delay: 1000n, l1BlockNumber: 102n, l2BlockNumber: 1n, proverId: proverId.toString() },
+    ]);
   }, 10_000);
 
   it('does not sync past current block number', async () => {
     const numL2BlocksInTest = 2;
-    const archiver = new Archiver(
+    archiver = new Archiver(
       publicClient,
       rollupAddress,
       availabilityOracleAddress,
       inboxAddress,
       registryAddress,
       archiverStore,
       1000,
-      new NoopTelemetryClient(),
+      instrumentation,
     );
 
     let latestBlockNum = await archiver.getBlockNumber();
@@ -207,8 +225,6 @@ describe('Archiver', () => {
 
     latestBlockNum = await archiver.getBlockNumber();
     expect(latestBlockNum).toEqual(numL2BlocksInTest);
-
-    await archiver.stop();
   }, 10_000);
 
   // logs should be created in order of how archiver syncs.