feat(taiko-client): only update LastUpdatedAt after batch proof submission

packages/taiko-client/prover/proof_submitter/proof_buffer.go

@@ -70,20 +70,16 @@ func (pb *ProofBuffer) Len() int {
 	return len(pb.buffer)
 }
 
-// Clear clears all buffer.
-func (pb *ProofBuffer) Clear() {
-	pb.mutex.Lock()
-	defer pb.mutex.Unlock()
-	pb.buffer = pb.buffer[:0]
-	pb.lastUpdatedAt = time.Now()
-	pb.isAggregating = false
-}
-
 // LastUpdatedAt returns the last updated time of the buffer.
 func (pb *ProofBuffer) LastUpdatedAt() time.Time {
 	return pb.lastUpdatedAt
 }
 
+// LastUpdatedAt returns the last updated time of the buffer.
+func (pb *ProofBuffer) UpdateLastUpdatedAt() {
+	pb.lastUpdatedAt = time.Now()
+}
+
 // ClearItems clears items that has given block ids in the buffer.
 func (pb *ProofBuffer) ClearItems(blockIDs ...uint64) int {
 	pb.mutex.Lock()
@@ -106,7 +102,6 @@ func (pb *ProofBuffer) ClearItems(blockIDs ...uint64) int {
 	}
 
 	pb.buffer = newBuffer
-	pb.lastUpdatedAt = time.Now()
 	pb.isAggregating = false
 	return clearedCount
 }

packages/taiko-client/prover/proof_submitter/proof_submitter.go

@@ -451,6 +451,8 @@ func (s *ProofSubmitter) BatchSubmitProofs(ctx context.Context, batchProof *proo
 	metrics.ProverSentProofCounter.Add(float64(len(batchProof.BlockIDs)))
 	metrics.ProverLatestProvenBlockIDGauge.Set(float64(latestProvenBlockID.Uint64()))
 	s.proofBuffer.ClearItems(uint64BlockIDs...)
+	// Each time we submit a batch proof, we should update the LastUpdatedAt() of the buffer.
+	s.proofBuffer.UpdateLastUpdatedAt()
 
 	return nil
 }