do not save non-existing to_address as null address

Author: iuwqyir

internal/rpc/serializer.go

@@ -167,21 +167,15 @@ func serializeTransactions(chainId *big.Int, transactions []interface{}, blockTi
 
 func serializeTransaction(chainId *big.Int, tx map[string]interface{}, blockTimestamp time.Time, receipt *common.RawReceipt) common.Transaction {
 	return common.Transaction{
-		ChainId:          chainId,
-		Hash:             interfaceToString(tx["hash"]),
-		Nonce:            hexToUint64(tx["nonce"]),
-		BlockHash:        interfaceToString(tx["blockHash"]),
-		BlockNumber:      hexToBigInt(tx["blockNumber"]),
-		BlockTimestamp:   blockTimestamp,
-		TransactionIndex: hexToUint64(tx["transactionIndex"]),
-		FromAddress:      interfaceToString(tx["from"]),
-		ToAddress: func() string {
-			to := interfaceToString(tx["to"])
-			if to != "" {
-				return to
-			}
-			return "0x0000000000000000000000000000000000000000"
-		}(),
+		ChainId:              chainId,
+		Hash:                 interfaceToString(tx["hash"]),
+		Nonce:                hexToUint64(tx["nonce"]),
+		BlockHash:            interfaceToString(tx["blockHash"]),
+		BlockNumber:          hexToBigInt(tx["blockNumber"]),
+		BlockTimestamp:       blockTimestamp,
+		TransactionIndex:     hexToUint64(tx["transactionIndex"]),
+		FromAddress:          interfaceToString(tx["from"]),
+		ToAddress:            interfaceToString(tx["to"]),
 		Value:                hexToBigInt(tx["value"]),
 		Gas:                  hexToUint64(tx["gas"]),
 		GasPrice:             hexToBigInt(tx["gasPrice"]),

internal/storage/clickhouse.go

@@ -32,6 +32,7 @@ type InsertOptions struct {
 var DEFAULT_MAX_ROWS_PER_INSERT = 100000
 var ZERO_BYTES_66 = strings.Repeat("\x00", 66)
 var ZERO_BYTES_10 = strings.Repeat("\x00", 10)
+var ZERO_BYTES_42 = strings.Repeat("\x00", 42)
 
 var defaultBlockFields = []string{
 	"chain_id", "block_number", "hash", "parent_hash", "block_timestamp", "nonce",
@@ -749,6 +750,9 @@ func scanTransaction(rows driver.Rows) (common.Transaction, error) {
 	if tx.FunctionSelector == ZERO_BYTES_10 {
 		tx.FunctionSelector = ""
 	}
+	if tx.ToAddress == ZERO_BYTES_42 {
+		tx.ToAddress = ""
+	}
 	return tx, nil
 }