Merge pull request ethereum#22 from uprendis/feature/optimize-receipts-deriving

Receipts.DeriveFields accepts Signer instead of ChainConfig

Author: quan8

core/rawdb/accessors_chain.go

@@ -600,7 +600,7 @@ func ReadReceipts(db ethdb.Reader, hash common.Hash, number uint64, config *para
 		log.Error("Missing body but have receipt", "hash", hash, "number", number)
 		return nil
 	}
-	if err := receipts.DeriveFields(config, hash, number, body.Transactions); err != nil {
+	if err := receipts.DeriveFields(types.MakeSigner(config, new(big.Int).SetUint64(number)), hash, number, body.Transactions); err != nil {
 		log.Error("Failed to derive block receipts fields", "hash", hash, "number", number, "err", err)
 		return nil
 	}

core/types/receipt.go

@@ -27,7 +27,6 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/ethereum/go-ethereum/params"
 	"github.com/ethereum/go-ethereum/rlp"
 )
 
@@ -354,9 +353,7 @@ func (rs Receipts) EncodeIndex(i int, w *bytes.Buffer) {
 
 // DeriveFields fills the receipts with their computed fields based on consensus
 // data and contextual infos like containing block and transactions.
-func (r Receipts) DeriveFields(config *params.ChainConfig, hash common.Hash, number uint64, txs Transactions) error {
-	signer := MakeSigner(config, new(big.Int).SetUint64(number))
-
+func (r Receipts) DeriveFields(signer Signer, hash common.Hash, number uint64, txs Transactions) error {
 	logIndex := uint(0)
 	if len(txs) != len(r) {
 		return errors.New("transaction and receipt count mismatch")
@@ -372,7 +369,7 @@ func (r Receipts) DeriveFields(config *params.ChainConfig, hash common.Hash, num
 		r[i].TransactionIndex = uint(i)
 
 		// The contract address can be derived from the transaction itself
-		if txs[i].To() == nil {
+		if signer != nil && txs[i].To() == nil {
 			// Deriving the signer is expensive, only do if it's actually needed
 			from, _ := Sender(signer, txs[i])
 			r[i].ContractAddress = crypto.CreateAddress(from, txs[i].Nonce())

core/types/receipt_test.go

@@ -229,7 +229,7 @@ func TestDeriveFields(t *testing.T) {
 	hash := common.BytesToHash([]byte{0x03, 0x14})
 
 	clearComputedFieldsOnReceipts(t, receipts)
-	if err := receipts.DeriveFields(params.TestChainConfig, hash, number.Uint64(), txs); err != nil {
+	if err := receipts.DeriveFields(MakeSigner(params.TestChainConfig, number), hash, number.Uint64(), txs); err != nil {
 		t.Fatalf("DeriveFields(...) = %v, want <nil>", err)
 	}
 	// Iterate over all the computed fields and check that they're correct

light/odr_util.go

@@ -175,7 +175,7 @@ func GetBlockReceipts(ctx context.Context, odr OdrBackend, hash common.Hash, num
 		genesis := rawdb.ReadCanonicalHash(odr.Database(), 0)
 		config := rawdb.ReadChainConfig(odr.Database(), genesis)
 
-		if err := receipts.DeriveFields(config, block.Hash(), block.NumberU64(), block.Transactions()); err != nil {
+		if err := receipts.DeriveFields(types.MakeSigner(config, new(big.Int).SetUint64(number)), block.Hash(), block.NumberU64(), block.Transactions()); err != nil {
 			return nil, err
 		}
 		rawdb.WriteReceipts(odr.Database(), hash, number, receipts)