feat(taiko-client): include ParentMetaHash for better revert protec…

…tion
taikoxyz · Feb 19, 2025 · b66b600 · b66b600
1 parent 1d40b44
commit b66b600
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Showing 2 changed files with 34 additions and 5 deletions.
diff --git a/packages/taiko-client/proposer/transaction_builder/blob.go b/packages/taiko-client/proposer/transaction_builder/blob.go
@@ -86,15 +86,30 @@ func (b *BlobTransactionBuilder) BuildOntake(
 
 		blobs = append(blobs, blob)
 
-		encodedParams, err := encoding.EncodeBlockParamsOntake(&encoding.BlockParamsV2{
+		params := &encoding.BlockParamsV2{
 			Coinbase:         b.l2SuggestedFeeRecipient,
 			ParentMetaHash:   [32]byte{},
 			AnchorBlockId:    0,
 			Timestamp:        0,
 			BlobTxListOffset: 0,
 			BlobTxListLength: uint32(len(txListBytesArray[i])),
 			BlobIndex:        uint8(i),
-		})
+		}
+
+		if i == 0 && b.revertProtectionEnabled {
+			state, err := b.rpc.GetProtocolStateVariables(nil)
+			if err != nil {
+				return nil, err
+			}
+
+			blockInfo, err := b.rpc.GetL2BlockInfoV2(ctx, new(big.Int).SetUint64(state.B.NumBlocks-1))
+			if err != nil {
+				return nil, err
+			}
+
+			params.ParentMetaHash = blockInfo.MetaHash
+		}
+		encodedParams, err := encoding.EncodeBlockParamsOntake(params)
 		if err != nil {
 			return nil, err
 		}

diff --git a/packages/taiko-client/proposer/transaction_builder/calldata.go b/packages/taiko-client/proposer/transaction_builder/calldata.go
@@ -73,13 +73,27 @@ func (b *CalldataTransactionBuilder) BuildOntake(
 		encodedParamsArray [][]byte
 	)
 
-	for range txListBytesArray {
-		encodedParams, err := encoding.EncodeBlockParamsOntake(&encoding.BlockParamsV2{
+	for i := range txListBytesArray {
+		params := &encoding.BlockParamsV2{
 			Coinbase:       b.l2SuggestedFeeRecipient,
 			ParentMetaHash: [32]byte{},
 			AnchorBlockId:  0,
 			Timestamp:      0,
-		})
+		}
+		if i == 0 && b.revertProtectionEnabled {
+			state, err := b.rpc.GetProtocolStateVariables(nil)
+			if err != nil {
+				return nil, err
+			}
+
+			blockInfo, err := b.rpc.GetL2BlockInfoV2(ctx, new(big.Int).SetUint64(state.B.NumBlocks-1))
+			if err != nil {
+				return nil, err
+			}
+
+			params.ParentMetaHash = blockInfo.MetaHash
+		}
+		encodedParams, err := encoding.EncodeBlockParamsOntake(params)
 		if err != nil {
 			return nil, err
 		}