chore(fast-inbox): follow the checkpoint header inHash removal through stdlib and node (A-1387)

Mirror the consensus-format change in the stdlib CheckpointHeader (struct,
serialization, viem, hash fixtures) and the circuit-ABI stdlib types
(ParityPublicInputs, InboxParityPrivateInputs) and their noir conversion
mappings. Sweep the header-inHash populate/read sites: the lightweight
checkpoint builder, the checkpoint-proving orchestrator, the sequencer fixture
writer, and the checkpoint proposal (its block-level inHash now sources zero
rather than the removed header field). Regenerate the checkpoint p2p wire
fixture for the shorter header.

Replace NUMBER_OF_L1_L2_MESSAGES_PER_ROLLUP with MAX_L1_TO_L2_MSGS_PER_CHECKPOINT
across the TS consumers. The block-level inHash struct fields (BlockProposal,
L2Block) and stdlib/src/messaging/in_hash.ts remain for the node cleanup issue.

Author: spalladino

yarn-project/archiver/src/l1/calldata_retriever.test.ts

@@ -1248,7 +1248,7 @@ describe('CalldataRetriever', () => {
       expect(result.blockHash).toBe(tx.blockHash);
 
       // Verify all components are properly decoded
-      expect(result.header.inHash).toBeInstanceOf(Fr);
+      expect(result.header.inboxRollingHash).toBeInstanceOf(Fr);
       expect(result.header.gasFees).toBeInstanceOf(GasFees);
 
       // Verify instrumentation was called
@@ -1322,7 +1322,7 @@ describe('CalldataRetriever', () => {
       expect(result.blockHash).toBe(blockHash);
 
       // Verify all components are properly decoded
-      expect(result.header.inHash).toBeInstanceOf(Fr);
+      expect(result.header.inboxRollingHash).toBeInstanceOf(Fr);
       expect(result.header.gasFees).toBeInstanceOf(GasFees);
 
       // Verify proxy implementation was checked

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

@@ -1,8 +1,4 @@
-import {
-  MAX_NOTE_HASHES_PER_TX,
-  NUMBER_OF_L1_L2_MESSAGES_PER_ROLLUP,
-  PRIVATE_LOG_SIZE_IN_FIELDS,
-} from '@aztec/constants';
+import { MAX_L1_TO_L2_MSGS_PER_CHECKPOINT, MAX_NOTE_HASHES_PER_TX, PRIVATE_LOG_SIZE_IN_FIELDS } from '@aztec/constants';
 import { makeTuple } from '@aztec/foundation/array';
 import { BlockNumber, CheckpointNumber, IndexWithinCheckpoint } from '@aztec/foundation/branded-types';
 import { Buffer16, Buffer32 } from '@aztec/foundation/buffer';
@@ -104,12 +100,12 @@ export function makeInboxMessagesWithFullBlocks(
   opts: { initialCheckpointNumber?: CheckpointNumber } = {},
 ): InboxMessage[] {
   const { initialCheckpointNumber = CheckpointNumber(13) } = opts;
-  return makeInboxMessages(NUMBER_OF_L1_L2_MESSAGES_PER_ROLLUP * blockCount, {
+  return makeInboxMessages(MAX_L1_TO_L2_MSGS_PER_CHECKPOINT * blockCount, {
     // Keep the compact global index from makeInboxMessages; only spread the (now-vestigial) checkpoint assignment
     // across blocks so multi-block coverage still exercises differing checkpoint numbers.
     overrideFn: (msg, i) => {
       const checkpointNumber = CheckpointNumber(
-        initialCheckpointNumber + Math.floor(i / NUMBER_OF_L1_L2_MESSAGES_PER_ROLLUP),
+        initialCheckpointNumber + Math.floor(i / MAX_L1_TO_L2_MSGS_PER_CHECKPOINT),
       );
       return { ...msg, checkpointNumber };
     },

yarn-project/ethereum/src/contracts/rollup.ts

@@ -79,7 +79,6 @@ export type ViemHeader = {
   lastArchiveRoot: `0x${string}`;
   blockHeadersHash: `0x${string}`;
   blobsHash: `0x${string}`;
-  inHash: `0x${string}`;
   inboxRollingHash: `0x${string}`;
   outHash: `0x${string}`;
   slotNumber: bigint;

yarn-project/ivc-integration/src/base_parity_inputs.test.ts

@@ -15,7 +15,7 @@ import { createLogger } from '@aztec/foundation/log';
 import { Noir } from '@aztec/noir-noir_js';
 import { ServerCircuitArtifacts } from '@aztec/noir-protocol-circuits-types/server';
 import { getVKTreeRoot } from '@aztec/noir-protocol-circuits-types/vk-tree';
-import { L1ToL2MessageSponge, computeInHashFromL1ToL2Messages } from '@aztec/stdlib/messaging';
+import { L1ToL2MessageSponge } from '@aztec/stdlib/messaging';
 import { InboxParityPrivateInputs } from '@aztec/stdlib/parity';
 
 import { jest } from '@jest/globals';
@@ -47,7 +47,6 @@ describe('Inbox Parity Benchmark Inputs', () => {
       l1ToL2Messages,
       Fr.ZERO,
       L1ToL2MessageSponge.empty(),
-      computeInHashFromL1ToL2Messages(l1ToL2Messages),
       vkTreeRoot,
       Fr.random(),
     );
@@ -75,8 +74,6 @@ describe('Inbox Parity Benchmark Inputs', () => {
         num_absorbed: startSponge.numAbsorbed,
       },
       // eslint-disable-next-line camelcase
-      in_hash: inputs.inHash.toString(),
-      // eslint-disable-next-line camelcase
       vk_tree_root: inputs.vkTreeRoot.toString(),
       // eslint-disable-next-line camelcase
       prover_id: inputs.proverId.toString(),

yarn-project/ivc-integration/src/bb_js_debug.test.ts

@@ -12,7 +12,7 @@ import { createLogger } from '@aztec/foundation/log';
 import { Noir } from '@aztec/noir-noir_js';
 import { ServerCircuitArtifacts } from '@aztec/noir-protocol-circuits-types/server';
 import { getVKTreeRoot } from '@aztec/noir-protocol-circuits-types/vk-tree';
-import { L1ToL2MessageSponge, computeInHashFromL1ToL2Messages } from '@aztec/stdlib/messaging';
+import { L1ToL2MessageSponge } from '@aztec/stdlib/messaging';
 import { InboxParityPrivateInputs } from '@aztec/stdlib/parity';
 
 import { jest } from '@jest/globals';
@@ -62,7 +62,6 @@ describe('BB.js Debug Wrapper', () => {
       l1ToL2Messages,
       Fr.ZERO,
       L1ToL2MessageSponge.empty(),
-      computeInHashFromL1ToL2Messages(l1ToL2Messages),
       vkTreeRoot,
       Fr.random(),
     );
@@ -88,8 +87,6 @@ describe('BB.js Debug Wrapper', () => {
         num_absorbed: startSponge.numAbsorbed,
       },
       // eslint-disable-next-line camelcase
-      in_hash: inboxParityInputs.inHash.toString(),
-      // eslint-disable-next-line camelcase
       vk_tree_root: inboxParityInputs.vkTreeRoot.toString(),
       // eslint-disable-next-line camelcase
       prover_id: inboxParityInputs.proverId.toString(),

yarn-project/noir-protocol-circuits-types/src/conversion/server.ts

@@ -481,7 +481,6 @@ export function mapAvmProofDataToNoir(
 
 function mapParityPublicInputsToNoir(parityPublicInputs: ParityPublicInputs): ParityPublicInputsNoir {
   return {
-    in_hash: mapFieldToNoir(parityPublicInputs.inHash),
     start_rolling_hash: mapFieldToNoir(parityPublicInputs.startRollingHash),
     end_rolling_hash: mapFieldToNoir(parityPublicInputs.endRollingHash),
     start_sponge: mapL1ToL2MessageSpongeToNoir(parityPublicInputs.startSponge),
@@ -520,7 +519,6 @@ export function mapRootRollupPublicInputsFromNoir(
  */
 export function mapParityPublicInputsFromNoir(parityPublicInputs: ParityPublicInputsNoir): ParityPublicInputs {
   return new ParityPublicInputs(
-    mapFieldFromNoir(parityPublicInputs.in_hash),
     mapFieldFromNoir(parityPublicInputs.start_rolling_hash),
     mapFieldFromNoir(parityPublicInputs.end_rolling_hash),
     mapL1ToL2MessageSpongeFromNoir(parityPublicInputs.start_sponge),
@@ -739,7 +737,6 @@ export function mapInboxParityPrivateInputsToNoir(inputs: InboxParityPrivateInpu
     num_msgs: mapNumberToNoir(inputs.numMessages),
     start_rolling_hash: mapFieldToNoir(inputs.startRollingHash),
     start_sponge: mapL1ToL2MessageSpongeToNoir(inputs.startSponge),
-    in_hash: mapFieldToNoir(inputs.inHash),
     vk_tree_root: mapFieldToNoir(inputs.vkTreeRoot),
     prover_id: mapFieldToNoir(inputs.proverId),
   };

yarn-project/prover-client/src/light/lightweight_checkpoint_builder.ts

@@ -248,7 +248,7 @@ export class LightweightCheckpointBuilder {
     this.blocks.push(block);
 
     // Accumulate the streaming bundle now that the block is fully built, so a mid-build throw above leaves the
-    // checkpoint's message list (and thus its inHash/rolling hash) consistent with the blocks actually built.
+    // checkpoint's message list (and thus its rolling hash) consistent with the blocks actually built.
     this.l1ToL2Messages.push(...l1ToL2Messages);
 
     const [msSpongeAbsorb] = await elapsed(() => this.spongeBlob.absorb(blockBlobFields));
@@ -283,9 +283,6 @@ export class LightweightCheckpointBuilder {
     const blobs = await getBlobsPerL1Block(this.blobFields);
     const blobsHash = computeBlobsHashFromBlobs(blobs);
 
-    // Legacy inHash is dead post-flip; the checkpoint header carries zero (AZIP-22 Fast Inbox). The consensus
-    // rolling hash over the consumed messages is the authoritative Inbox commitment.
-    const inHash = Fr.ZERO;
     const inboxRollingHash = accumulateInboxRollingHash(this.previousInboxRollingHash, this.l1ToL2Messages);
 
     const { slotNumber, coinbase, feeRecipient, gasFees } = this.constants;
@@ -303,7 +300,6 @@ export class LightweightCheckpointBuilder {
     const header = CheckpointHeader.from({
       lastArchiveRoot: this.lastArchives[0].root,
       blobsHash,
-      inHash,
       inboxRollingHash,
       epochOutHash,
       blockHeadersHash,

yarn-project/prover-client/src/orchestrator/checkpoint-proving-state.ts

@@ -161,15 +161,13 @@ export class CheckpointProvingState {
   /**
    * Builds the checkpoint's single InboxParity input. The circuit is sized to the smallest ladder rung that fits the
    * message count; the rolling hash starts from the previous checkpoint's end and the message sponge starts empty (it
-   * resets per checkpoint). `in_hash` (the L1 frontier root) is supplied as an unconstrained pass-through hint.
+   * resets per checkpoint).
    */
   public getInboxParityInputs(): InboxParityPrivateInputs {
     return InboxParityPrivateInputs.fromMessages(
       this.l1ToL2Messages,
       this.startInboxRollingHash,
       L1ToL2MessageSponge.empty(),
-      // Legacy in_hash is dead post-flip; the InboxParity pass-through hint carries zero (AZIP-22 Fast Inbox).
-      Fr.ZERO,
       this.constants.vkTreeRoot,
       this.constants.proverId,
     );

yarn-project/prover-client/src/test/bb_prover_parity.test.ts

@@ -5,7 +5,7 @@ import { createLogger } from '@aztec/foundation/log';
 import type { ServerProtocolArtifact } from '@aztec/noir-protocol-circuits-types/server';
 import { ServerCircuitVks } from '@aztec/noir-protocol-circuits-types/server/vks';
 import { getVKTreeRoot } from '@aztec/noir-protocol-circuits-types/vk-tree';
-import { L1ToL2MessageSponge, computeInHashFromL1ToL2Messages } from '@aztec/stdlib/messaging';
+import { L1ToL2MessageSponge } from '@aztec/stdlib/messaging';
 import { INBOX_PARITY_SIZES, InboxParityPrivateInputs, type InboxParitySize } from '@aztec/stdlib/parity';
 
 import { TestContext } from '../mocks/test_context.js';
@@ -48,15 +48,11 @@ describe('prover/bb_prover/parity', () => {
       // Fill the rung with real messages so `numMessages === size` (the largest circuit for that rung).
       const messages = Array.from({ length: size }, () => Fr.random());
       const proverId = Fr.random();
-      // The in_hash is a sha256 frontier root (top byte zeroed to fit the field), which `ParityPublicInputs` enforces;
-      // compute it from the messages rather than using a raw random field.
-      const inHash = computeInHashFromL1ToL2Messages(messages);
 
       const inputs = InboxParityPrivateInputs.fromMessages(
         messages,
         Fr.ZERO,
         L1ToL2MessageSponge.empty(),
-        inHash,
         getVKTreeRoot(),
         proverId,
       );

yarn-project/pxe/src/storage/backwards_compatibility_tests/schema_tests.ts

@@ -275,7 +275,6 @@ export const SCHEMA_TESTS: readonly SchemaTest[] = [
             new Fr(5n),
             new Fr(7n),
             new Fr(11n),
-            new Fr(13n),
             new Fr(15n),
             new Fr(17n),
             SlotNumber(19),