core: remove unnecessary fields in log

core/rawdb/accessors_chain.go

@@ -294,7 +294,17 @@ func ReadReceipts(db DatabaseReader, hash common.Hash, number uint64) types.Rece
 		return nil
 	}
 	receipts := make(types.Receipts, len(storageReceipts))
+	logIndex := uint(0)
 	for i, receipt := range storageReceipts {
+		// Assemble deriving fields for log.
+		for _, log := range receipt.Logs {
+			log.TxHash = receipt.TxHash
+			log.BlockHash = hash
+			log.BlockNumber = number
+			log.TxIndex = uint(i)
+			log.Index = logIndex
+			logIndex += 1
+		}
 		receipts[i] = (*types.Receipt)(receipt)
 	}
 	return receipts

core/rawdb/accessors_chain_test.go

@@ -279,6 +279,7 @@ func TestBlockReceiptStorage(t *testing.T) {
 		ContractAddress: common.BytesToAddress([]byte{0x01, 0x11, 0x11}),
 		GasUsed:         111111,
 	}
+	receipt1.Bloom = types.CreateBloom(types.Receipts{receipt1})
 	receipt2 := &types.Receipt{
 		PostState:         common.Hash{2}.Bytes(),
 		CumulativeGasUsed: 2,
@@ -290,6 +291,7 @@ func TestBlockReceiptStorage(t *testing.T) {
 		ContractAddress: common.BytesToAddress([]byte{0x02, 0x22, 0x22}),
 		GasUsed:         222222,
 	}
+	receipt2.Bloom = types.CreateBloom(types.Receipts{receipt2})
 	receipts := []*types.Receipt{receipt1, receipt2}
 
 	// Check that no receipt entries are in a pristine database

core/types/gen_log_json.go

@@ -12,6 +12,7 @@ import (
 
 var _ = (*logMarshaling)(nil)
 
+// MarshalJSON marshals as JSON.
 func (l Log) MarshalJSON() ([]byte, error) {
 	type Log struct {
 		Address     common.Address `json:"address" gencodec:"required"`
@@ -37,6 +38,7 @@ func (l Log) MarshalJSON() ([]byte, error) {
 	return json.Marshal(&enc)
 }
 
+// UnmarshalJSON unmarshals from JSON.
 func (l *Log) UnmarshalJSON(input []byte) error {
 	type Log struct {
 		Address     *common.Address `json:"address" gencodec:"required"`

core/types/log.go

@@ -68,7 +68,11 @@ type rlpLog struct {
 	Data    []byte
 }
 
-type rlpStorageLog struct {
+// rlpStorageLog is the storage encoding of a log.
+type rlpStorageLog rlpLog
+
+// rlpSwollenStorageLog is the previous storage encoding of a log including some redundant fields.
+type rlpSwollenStorageLog struct {
 	Address     common.Address
 	Topics      []common.Hash
 	Data        []byte
@@ -104,15 +108,12 @@ func (l *LogForStorage) EncodeRLP(w io.Writer) error {
 		Address: l.Address,
 		Topics:  l.Topics,
 		Data:    l.Data,
-		BlockNumber: l.BlockNumber,
-		TxHash:      l.TxHash,
-		TxIndex:     l.TxIndex,
-		BlockHash:   l.BlockHash,
-		Index:       l.Index,
 	})
 }
 
 // DecodeRLP implements rlp.Decoder.
+//
+// Note some redundant fields(e.g. block number, tx hash etc) will be assembled later.
 func (l *LogForStorage) DecodeRLP(s *rlp.Stream) error {
 	var dec rlpStorageLog
 	err := s.Decode(&dec)
@@ -121,11 +122,17 @@ func (l *LogForStorage) DecodeRLP(s *rlp.Stream) error {
 			Address: dec.Address,
 			Topics:  dec.Topics,
 			Data:    dec.Data,
-			BlockNumber: dec.BlockNumber,
+		}
-			TxHash:      dec.TxHash,
+	} else {
-			TxIndex:     dec.TxIndex,
+		// Try to decode log with previous definition.
-			BlockHash:   dec.BlockHash,
+		var dec rlpSwollenStorageLog
-			Index:       dec.Index,
+		err = s.Decode(&dec)
+		if err == nil {
+			*l = LogForStorage{
+				Address: dec.Address,
+				Topics:  dec.Topics,
+				Data:    dec.Data,
+			}
 		}
 	}
 	return err

core/types/receipt.go

@@ -72,7 +72,18 @@ type receiptRLP struct {
 	Logs              []*Log
 }
 
+// receiptStorageRLP is the storage encoding of a receipt.
 type receiptStorageRLP struct {
+	PostStateOrStatus []byte
+	CumulativeGasUsed uint64
+	TxHash            common.Hash
+	ContractAddress   common.Address
+	Logs              []*LogForStorage
+	GasUsed           uint64
+}
+
+// receiptSwollenStorageRLP is the previous storage encoding of a receipt including some unnecessary fields.
+type receiptSwollenStorageRLP struct {
 	PostStateOrStatus []byte
 	CumulativeGasUsed uint64
 	Bloom             Bloom
@@ -159,7 +170,6 @@ func (r *ReceiptForStorage) EncodeRLP(w io.Writer) error {
 	enc := &receiptStorageRLP{
 		PostStateOrStatus: (*Receipt)(r).statusEncoding(),
 		CumulativeGasUsed: r.CumulativeGasUsed,
-		Bloom:             r.Bloom,
 		TxHash:            r.TxHash,
 		ContractAddress:   r.ContractAddress,
 		Logs:              make([]*LogForStorage, len(r.Logs)),
@@ -176,17 +186,27 @@ func (r *ReceiptForStorage) EncodeRLP(w io.Writer) error {
 func (r *ReceiptForStorage) DecodeRLP(s *rlp.Stream) error {
 	var dec receiptStorageRLP
 	if err := s.Decode(&dec); err != nil {
+		var sdec receiptSwollenStorageRLP
+		if err := s.Decode(&sdec); err != nil {
 			return err
 		}
+		dec.PostStateOrStatus = common.CopyBytes(sdec.PostStateOrStatus)
+		dec.CumulativeGasUsed = sdec.CumulativeGasUsed
+		dec.TxHash = sdec.TxHash
+		dec.ContractAddress = sdec.ContractAddress
+		dec.Logs = sdec.Logs
+		dec.GasUsed = sdec.GasUsed
+	}
 	if err := (*Receipt)(r).setStatus(dec.PostStateOrStatus); err != nil {
 		return err
 	}
 	// Assign the consensus fields
-	r.CumulativeGasUsed, r.Bloom = dec.CumulativeGasUsed, dec.Bloom
+	r.CumulativeGasUsed = dec.CumulativeGasUsed
 	r.Logs = make([]*Log, len(dec.Logs))
 	for i, log := range dec.Logs {
 		r.Logs[i] = (*Log)(log)
 	}
+	r.Bloom = CreateBloom(Receipts{(*Receipt)(r)})
 	// Assign the implementation fields
 	r.TxHash, r.ContractAddress, r.GasUsed = dec.TxHash, dec.ContractAddress, dec.GasUsed
 	return nil