AztecProtocol · MirandaWood · Nov 25, 2024 · Sep 25, 2024 · Sep 27, 2024 · Oct 2, 2024
diff --git a/l1-contracts/src/core/Rollup.sol b/l1-contracts/src/core/Rollup.sol
diff --git a/l1-contracts/src/core/interfaces/IRollup.sol b/l1-contracts/src/core/interfaces/IRollup.sol
@@ -49,10 +49,8 @@ interface IRollup {
   ) external;
 
   function submitEpochRootProof(
-    uint256 _epochSize,
-    bytes32[7] calldata _args,
-    bytes32[] calldata _fees,
-    bytes calldata _blobPublicInputsAndAggregationObject,
+    DataStructures.SubmitProofArgs calldata _submitArgs,
+    bytes calldata _aggregationObject,
     bytes calldata _proof
   ) external;
 
@@ -63,7 +61,7 @@ interface IRollup {
     SignatureLib.Signature[] memory _signatures,
     bytes32 _digest,
     Timestamp _currentTime,
-    bytes32 _blobHash,
+    bytes32 _blobsHash,
     DataStructures.ExecutionFlags memory _flags
   ) external view;
 
@@ -107,10 +105,8 @@ interface IRollup {
   ) external view;
   function getEpochForBlock(uint256 _blockNumber) external view returns (Epoch);
   function getEpochProofPublicInputs(
-    uint256 _epochSize,
-    bytes32[7] calldata _args,
-    bytes32[] calldata _fees,
-    bytes calldata _blobPublicInputsAndAggregationObject
+    DataStructures.SubmitProofArgs calldata _submitArgs,
+    bytes calldata _aggregationObject
   ) external view returns (bytes32[] memory);
   function computeTxsEffectsHash(bytes calldata _body) external pure returns (bytes32);
 }
diff --git a/l1-contracts/src/core/libraries/DataStructures.sol b/l1-contracts/src/core/libraries/DataStructures.sol
@@ -92,4 +92,18 @@ library DataStructures {
     address bondProvider;
     address proposerClaimant;
   }
+
+  /**
+   * @notice Struct for submitting the Epoch Proof
+   * @param  epochSize - The size of the epoch (to be promoted to a constant)
+   * @param  args - Array of public inputs to the proof (previousArchive, endArchive, previousBlockHash, endBlockHash, endTimestamp, outHash, proverId)
+   * @param  fees - Array of recipient-value pairs with fees to be distributed for the epoch
+   * @param  blobPublicInputs- The blob PIs for the proof
+   */
+  struct SubmitProofArgs {
+    uint256 epochSize;
+    bytes32[7] args;
+    bytes32[] fees;
+    bytes blobPublicInputs;
+  }
 }
diff --git a/l1-contracts/src/core/libraries/HeaderLib.sol b/l1-contracts/src/core/libraries/HeaderLib.sol
@@ -24,7 +24,7 @@ import {Errors} from "@aztec/core/libraries/Errors.sol";
  *  | 0x0020                                                                           | 0x04         |   lastArchive.nextAvailableLeafIndex
  *  |                                                                                  |              |   ContentCommitment {
  *  | 0x0024                                                                           | 0x20         |     numTxs
- *  | 0x0044                                                                           | 0x20         |     blobHash
+ *  | 0x0044                                                                           | 0x20         |     blobsHash
  *  | 0x0064                                                                           | 0x20         |     inHash
  *  | 0x0084                                                                           | 0x20         |     outHash
  *  |                                                                                  |              |   StateReference {
@@ -91,7 +91,7 @@ library HeaderLib {
 
   struct ContentCommitment {
     uint256 numTxs;
-    bytes32 blobHash;
+    bytes32 blobsHash;
     bytes32 inHash;
     bytes32 outHash;
   }
@@ -126,7 +126,7 @@ library HeaderLib {
 
     // Reading ContentCommitment
     header.contentCommitment.numTxs = uint256(bytes32(_header[0x0024:0x0044]));
-    header.contentCommitment.blobHash = bytes32(_header[0x0044:0x0064]);
+    header.contentCommitment.blobsHash = bytes32(_header[0x0044:0x0064]);
     header.contentCommitment.inHash = bytes32(_header[0x0064:0x0084]);
     header.contentCommitment.outHash = bytes32(_header[0x0084:0x00a4]);
 

diff --git a/l1-contracts/test/Rollup.t.sol b/l1-contracts/test/Rollup.t.sol
@@ -1255,12 +1255,17 @@ contract RollupTest is DecoderBase, TimeFns {
     fees[0] = bytes32(uint256(uint160(_feeRecipient)));
     fees[1] = bytes32(_feeAmount);
 
+    DataStructures.SubmitProofArgs memory submitArgs = DataStructures.SubmitProofArgs({
+      epochSize: _epochSize,
+      args: args,
+      fees: fees,
+      blobPublicInputs: _blobPublicInputs
+    });
+
     bytes memory aggregationObject = "";
     bytes memory proof = "";
 
-    _rollup.submitEpochRootProof(
-      _epochSize, args, fees, abi.encodePacked(_blobPublicInputs, aggregationObject), proof
-    );
+    _rollup.submitEpochRootProof(submitArgs, aggregationObject, proof);
   }
 
   function _quoteToSignedQuote(EpochProofQuoteLib.EpochProofQuote memory _quote)

diff --git a/l1-contracts/test/decoders/Base.sol b/l1-contracts/test/decoders/Base.sol
@@ -75,7 +75,7 @@ contract DecoderBase is TestBase {
   }
 
   struct ContentCommitment {
-    bytes32 blobHash;
+    bytes32 blobsHash;
     bytes32 inHash;
     uint256 numTxs;
     bytes32 outHash;

diff --git a/l1-contracts/test/decoders/Decoders.t.sol b/l1-contracts/test/decoders/Decoders.t.sol
@@ -76,7 +76,9 @@ contract DecodersTest is DecoderBase {
         DecoderBase.ContentCommitment memory contentCommitment = referenceHeader.contentCommitment;
 
         assertEq(header.contentCommitment.numTxs, contentCommitment.numTxs, "Invalid txTreeSize");
-        assertEq(header.contentCommitment.blobHash, contentCommitment.blobHash, "Invalid blobHash");
+        assertEq(
+          header.contentCommitment.blobsHash, contentCommitment.blobsHash, "Invalid blobHash"
+        );
         assertEq(header.contentCommitment.inHash, contentCommitment.inHash, "Invalid inHash");
         assertEq(header.contentCommitment.outHash, contentCommitment.outHash, "Invalid outHash");
       }

diff --git a/l1-contracts/test/fixtures/empty_block_1.json b/l1-contracts/test/fixtures/empty_block_1.json
@@ -8,12 +8,12 @@
     "l2ToL1Messages": []
   },
   "block": {
-    "archive": "0x0608b59639f4b6e991f2192041a0a1a18fdb25c3a9a0da8334a344d4a2d95d25",
-    "blockHash": "0x23dbfcca3effdce13442bff627b1d1c372380fd4eb58beb596bd43239d8a7bfc",
+    "archive": "0x192b47a3a12bb20ef6b467f094b0c0f546d81736d60cef42402dea60c8c0d525",
+    "blockHash": "0x13f42a72624ae6b4bf3ae1fdb26f3e2d06d3417b60af4f365df13706fd4783a4",
     "body": "0x00000000",
     "decodedHeader": {
       "contentCommitment": {
-        "blobHash": "0x001cedbd7ea5309ef9d1d159209835409bf41b6b1802597a52fa70cc82e934d9",
+        "blobsHash": "0x001cedbd7ea5309ef9d1d159209835409bf41b6b1802597a52fa70cc82e934d9",
         "inHash": "0x00089a9d421a82c4a25f7acbebe69e638d5b064fa8a60e018793dcb0be53752c",
         "outHash": "0x00f5a5fd42d16a20302798ef6ed309979b43003d2320d9f0e8ea9831a92759fb",
         "numTxs": 2
@@ -22,10 +22,10 @@
         "blockNumber": 1,
         "slotNumber": "0x0000000000000000000000000000000000000000000000000000000000000012",
         "chainId": 31337,
-        "timestamp": 1731775446,
+        "timestamp": 1732285514,
         "version": 1,
-        "coinbase": "0x8dce642ee912e07e7686a2c7d8d15a12006bc0ce",
-        "feeRecipient": "0x14eec7ed2c57101c4f1b2fb7f16fa98b0c509b82c7d1da46e51f56bfc181a319",
+        "coinbase": "0xf7cb80e18216bac01baa25aaa61decd9784c4d73",
+        "feeRecipient": "0x2861cd68fd33e3acc2f56271a629d5b2a61c027b2a4cbd2a98f44c8a56d25453",
         "gasFees": {
           "feePerDaGas": 0,
           "feePerL2Gas": 0
@@ -50,14 +50,14 @@
             "root": "0x0c499b373a1f0fe1b510a63563546d2d39e206895056a5af0143c5f30d639073"
           },
           "publicDataTree": {
-            "nextAvailableLeafIndex": 256,
+            "nextAvailableLeafIndex": 128,
             "root": "0x23c08a6b1297210c5e24c76b9a936250a1ce2721576c26ea797c7ec35f9e46a9"
           }
         }
       }
     },
-    "header": "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",
-    "publicInputsHash": "0x008cf42fa316df70efb2c53dbbd265613be250b38603c51a36cdd1de30b61272",
+    "header": "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",
+    "publicInputsHash": "0x00e98d4e431913fb9e1054e86564a761cfd983765b07a557b7b3201b8ddaecba",
     "blobInputs": "0x01010657f37554c781402a22917dee2f75def7ab966d7b770905398eba3c4440140ac4f3ee53aedc4865073ae7fb664e7401d10eadbe3bbcc266c35059f14826bb0000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
     "numTxs": 0
   }

diff --git a/l1-contracts/test/fixtures/empty_block_2.json b/l1-contracts/test/fixtures/empty_block_2.json
@@ -8,12 +8,12 @@
     "l2ToL1Messages": []
   },
   "block": {
-    "archive": "0x142d6054dfd797a35b57dc84fd98867584d75e96a7399b7c27f4636e969fd61b",
-    "blockHash": "0x2db000b1a872480487023e4e8171c608d36f0a7e4e2caad67796e65b520122ca",
+    "archive": "0x1584dbcbe9d5e96b07bd5a2d9477b1f76d1670528644f240c86cafda613ce22c",
+    "blockHash": "0x303a5cd1113d57baebccadd3496491821599e7f1458bdbb0675ce9d71e7404d1",
     "body": "0x00000000",
     "decodedHeader": {
       "contentCommitment": {
-        "blobHash": "0x001cedbd7ea5309ef9d1d159209835409bf41b6b1802597a52fa70cc82e934d9",
+        "blobsHash": "0x001cedbd7ea5309ef9d1d159209835409bf41b6b1802597a52fa70cc82e934d9",
         "inHash": "0x00089a9d421a82c4a25f7acbebe69e638d5b064fa8a60e018793dcb0be53752c",
         "outHash": "0x00f5a5fd42d16a20302798ef6ed309979b43003d2320d9f0e8ea9831a92759fb",
         "numTxs": 2
@@ -22,18 +22,18 @@
         "blockNumber": 2,
         "slotNumber": "0x0000000000000000000000000000000000000000000000000000000000000013",
         "chainId": 31337,
-        "timestamp": 1731775470,
+        "timestamp": 1732285538,
         "version": 1,
-        "coinbase": "0x8dce642ee912e07e7686a2c7d8d15a12006bc0ce",
-        "feeRecipient": "0x14eec7ed2c57101c4f1b2fb7f16fa98b0c509b82c7d1da46e51f56bfc181a319",
+        "coinbase": "0xf7cb80e18216bac01baa25aaa61decd9784c4d73",
+        "feeRecipient": "0x2861cd68fd33e3acc2f56271a629d5b2a61c027b2a4cbd2a98f44c8a56d25453",
         "gasFees": {
           "feePerDaGas": 0,
           "feePerL2Gas": 0
         }
       },
       "lastArchive": {
         "nextAvailableLeafIndex": 2,
-        "root": "0x0608b59639f4b6e991f2192041a0a1a18fdb25c3a9a0da8334a344d4a2d95d25"
+        "root": "0x192b47a3a12bb20ef6b467f094b0c0f546d81736d60cef42402dea60c8c0d525"
       },
       "stateReference": {
         "l1ToL2MessageTree": {
@@ -50,14 +50,14 @@
             "root": "0x0c499b373a1f0fe1b510a63563546d2d39e206895056a5af0143c5f30d639073"
           },
           "publicDataTree": {
-            "nextAvailableLeafIndex": 384,
+            "nextAvailableLeafIndex": 128,
             "root": "0x23c08a6b1297210c5e24c76b9a936250a1ce2721576c26ea797c7ec35f9e46a9"
           }
         }
       }
     },
-    "header": "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",
-    "publicInputsHash": "0x002f52b85580ed695df034d3a102c017c8e9a2f7e817e94aa5ebf12763fd5b96",
+    "header": "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",
+    "publicInputsHash": "0x008280aabced37627bae259d76bd9a83189c8523f77f4f712cfd024fad4935b0",
     "blobInputs": "0x01010657f37554c781402a22917dee2f75def7ab966d7b770905398eba3c4440140ac4f3ee53aedc4865073ae7fb664e7401d10eadbe3bbcc266c35059f14826bb0000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000c00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
     "numTxs": 0
   }

diff --git a/l1-contracts/test/fixtures/mixed_block_1.json b/l1-contracts/test/fixtures/mixed_block_1.json
diff --git a/l1-contracts/test/fixtures/mixed_block_2.json b/l1-contracts/test/fixtures/mixed_block_2.json
diff --git a/yarn-project/archiver/src/archiver/data_retrieval.ts b/yarn-project/archiver/src/archiver/data_retrieval.ts
@@ -295,7 +295,7 @@ export async function retrieveL2ProofsFromRollup(
 export type SubmitBlockProof = {
   archiveRoot: Fr;
   proverId: Fr;
-  blobPublicInputsAndAggregationObject: Buffer;
+  aggregationObject: Buffer;
   proof: Proof;
 };
 
@@ -318,14 +318,14 @@ export async function getProofFromSubmitProofTx(
 
   let proverId: Fr;
   let archiveRoot: Fr;
-  let blobPublicInputsAndAggregationObject: Buffer;
+  let aggregationObject: Buffer;
   let proof: Proof;
 
   if (functionName === 'submitEpochRootProof') {
-    const [_epochSize, nestedArgs, _fees, aggregationObjectHex, proofHex] = args!;
-    blobPublicInputsAndAggregationObject = Buffer.from(hexToBytes(aggregationObjectHex));
-    proverId = Fr.fromString(nestedArgs[6]);
-    archiveRoot = Fr.fromString(nestedArgs[1]);
+    const [submitArgs, aggregationObjectHex, proofHex] = args!;
+    aggregationObject = Buffer.from(hexToBytes(aggregationObjectHex));
+    proverId = Fr.fromString(submitArgs.args[6]);
+    archiveRoot = Fr.fromString(submitArgs.args[1]);
     proof = Proof.fromBuffer(Buffer.from(hexToBytes(proofHex)));
   } else {
     throw new Error(`Unexpected proof method called ${functionName}`);
@@ -337,7 +337,7 @@ export async function getProofFromSubmitProofTx(
 
   return {
     proverId,
-    blobPublicInputsAndAggregationObject,
+    aggregationObject,
     archiveRoot,
     proof,
   };

diff --git a/yarn-project/end-to-end/src/composed/integration_l1_publisher.test.ts b/yarn-project/end-to-end/src/composed/integration_l1_publisher.test.ts
@@ -246,7 +246,7 @@ describe('L1Publisher integration', () => {
         body: `0x${block.body.toBuffer().toString('hex')}`,
         decodedHeader: {
           contentCommitment: {
-            blobHash: `0x${block.header.contentCommitment.blobsHash.toString('hex').padStart(64, '0')}`,
+            blobsHash: `0x${block.header.contentCommitment.blobsHash.toString('hex').padStart(64, '0')}`,
             inHash: `0x${block.header.contentCommitment.inHash.toString('hex').padStart(64, '0')}`,
             outHash: `0x${block.header.contentCommitment.outHash.toString('hex').padStart(64, '0')}`,
             numTxs: Number(block.header.contentCommitment.numTxs),

diff --git a/yarn-project/sequencer-client/src/publisher/l1-publisher.ts b/yarn-project/sequencer-client/src/publisher/l1-publisher.ts
@@ -780,25 +780,28 @@ export class L1Publisher {
     proof: Proof;
   }) {
     return [
-      BigInt(args.toBlock - args.fromBlock + 1),
-      [
-        args.publicInputs.previousArchive.root.toString(),
-        args.publicInputs.endArchive.root.toString(),
-        args.publicInputs.previousBlockHash.toString(),
-        args.publicInputs.endBlockHash.toString(),
-        args.publicInputs.endTimestamp.toString(),
-        args.publicInputs.outHash.toString(),
-        args.publicInputs.proverId.toString(),
-      ],
-      makeTuple(AZTEC_MAX_EPOCH_DURATION * 2, i =>
-        i % 2 === 0
-          ? args.publicInputs.fees[i / 2].recipient.toField().toString()
-          : args.publicInputs.fees[(i - 1) / 2].value.toString(),
-      ),
-      `0x${args.publicInputs.blobPublicInputs
-        .filter((_, i) => i < args.toBlock - args.fromBlock + 1)
-        .map(b => b.toString())
-        .join(``)}${serializeToBuffer(args.proof.extractAggregationObject()).toString('hex')}`,
+      {
+        epochSize: BigInt(args.toBlock - args.fromBlock + 1),
+        args: [
+          args.publicInputs.previousArchive.root.toString(),
+          args.publicInputs.endArchive.root.toString(),
+          args.publicInputs.previousBlockHash.toString(),
+          args.publicInputs.endBlockHash.toString(),
+          args.publicInputs.endTimestamp.toString(),
+          args.publicInputs.outHash.toString(),
+          args.publicInputs.proverId.toString(),
+        ],
+        fees: makeTuple(AZTEC_MAX_EPOCH_DURATION * 2, i =>
+          i % 2 === 0
+            ? args.publicInputs.fees[i / 2].recipient.toField().toString()
+            : args.publicInputs.fees[(i - 1) / 2].value.toString(),
+        ),
+        blobPublicInputs: `0x${args.publicInputs.blobPublicInputs
+          .filter((_, i) => i < args.toBlock - args.fromBlock + 1)
+          .map(b => b.toString())
+          .join(``)}`,
+      },
+      `0x${serializeToBuffer(args.proof.extractAggregationObject()).toString('hex')}`,
     ] as const;
   }