fix(prover): fix guardian prover database key (#522)

Co-authored-by: maskpp <maskpp266@gmail.com>
Co-authored-by: David <david@taiko.xyz>

prover/db/db.go

@@ -9,7 +9,7 @@ import (
 )
 
 var (
-	blockKeyPrefix = "block-"
+	blockKeyPrefix = "block"
 	separator      = "++"
 )
 
@@ -21,12 +21,13 @@ type SignedBlockData struct {
 }
 
 // BuildBlockKey will build a block key for a signed block
-func BuildBlockKey(blockTimestamp uint64) []byte {
+func BuildBlockKey(blockTimestamp uint64, blockNumber uint64) []byte {
 	return bytes.Join(
 		[][]byte{
 			[]byte(blockKeyPrefix),
 			[]byte(strconv.Itoa(int(blockTimestamp))),
-		}, []byte{})
+			[]byte(strconv.Itoa(int(blockNumber))),
+		}, []byte(separator))
 }
 
 // BuildBlockValue will build a block value for a signed block

prover/db/db_test.go

@@ -10,7 +10,7 @@ import (
 )
 
 func Test_BuildBlockKey(t *testing.T) {
-	assert.Equal(t, []byte("block-1"), BuildBlockKey(1))
+	assert.Equal(t, []byte("block++1++300"), BuildBlockKey(1, 300))
 }
 
 func Test_BuildBlockValue(t *testing.T) {

prover/guardian_prover_sender/guardian_prover.go

@@ -101,17 +101,13 @@ func (s *GuardianProverBlockSender) SignAndSendBlock(ctx context.Context, blockI
 		return err
 	}
 
-	if err := s.db.Put(
-		db.BuildBlockKey(header.Time),
+	return s.db.Put(
+		db.BuildBlockKey(header.Time, header.Number.Uint64()),
 		db.BuildBlockValue(header.Hash().Bytes(),
 			signed,
 			blockID,
 		),
-	); err != nil {
-		return err
-	}
-
-	return nil
+	)
 }
 
 // sendSignedBlockReq is the actual method that sends the signed block to the health check server.
@@ -173,7 +169,7 @@ func (s *GuardianProverBlockSender) sign(ctx context.Context, blockID *big.Int)
 		return nil, nil, err
 	}
 
-	exists, err := s.db.Has(db.BuildBlockKey(header.Time))
+	exists, err := s.db.Has(db.BuildBlockKey(header.Time, header.Number.Uint64()))
 	if err != nil {
 		return nil, nil, err
 	}