diff --git a/accounts/abi/bind/util_test.go b/accounts/abi/bind/util_test.go
index d3ed02575..f31dbfc29 100644
--- a/accounts/abi/bind/util_test.go
+++ b/accounts/abi/bind/util_test.go
@@ -60,7 +60,7 @@ func TestWaitDeployed(t *testing.T) {
 
 		// Create the transaction.
 		tx := types.NewContractCreation(0, big.NewInt(0), test.gas, big.NewInt(1), common.FromHex(test.code))
-		tx, _ = tx.SignECDSA(types.HomesteadSigner{}, testKey)
+		tx, _ = types.SignTx(tx, types.HomesteadSigner{}, testKey)
 
 		// Wait for it to get mined in the background.
 		var (
diff --git a/core/bench_test.go b/core/bench_test.go
index a208ea250..5785748a1 100644
--- a/core/bench_test.go
+++ b/core/bench_test.go
@@ -83,7 +83,7 @@ func genValueTx(nbytes int) func(int, *BlockGen) {
 		toaddr := common.Address{}
 		data := make([]byte, nbytes)
 		gas := IntrinsicGas(data, false, false)
-		tx, _ := types.NewTransaction(gen.TxNonce(benchRootAddr), toaddr, big.NewInt(1), gas, nil, data).SignECDSA(types.HomesteadSigner{}, benchRootKey)
+		tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(benchRootAddr), toaddr, big.NewInt(1), gas, nil, data), types.HomesteadSigner{}, benchRootKey)
 		gen.AddTx(tx)
 	}
 }
@@ -123,7 +123,7 @@ func genTxRing(naccounts int) func(int, *BlockGen) {
 				nil,
 				nil,
 			)
-			tx, _ = tx.SignECDSA(types.HomesteadSigner{}, ringKeys[from])
+			tx, _ = types.SignTx(tx, types.HomesteadSigner{}, ringKeys[from])
 			gen.AddTx(tx)
 			from = to
 		}
diff --git a/core/blockchain_test.go b/core/blockchain_test.go
index a2c350479..25733ce08 100644
--- a/core/blockchain_test.go
+++ b/core/blockchain_test.go
@@ -719,7 +719,7 @@ func TestFastVsFullChains(t *testing.T) {
 		// If the block number is multiple of 3, send a few bonus transactions to the miner
 		if i%3 == 2 {
 			for j := 0; j < i%4+1; j++ {
-				tx, err := types.NewTransaction(block.TxNonce(address), common.Address{0x00}, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key)
+				tx, err := types.SignTx(types.NewTransaction(block.TxNonce(address), common.Address{0x00}, big.NewInt(1000), params.TxGas, nil, nil), signer, key)
 				if err != nil {
 					panic(err)
 				}
@@ -883,8 +883,8 @@ func TestChainTxReorgs(t *testing.T) {
 	// Create two transactions shared between the chains:
 	//  - postponed: transaction included at a later block in the forked chain
 	//  - swapped: transaction included at the same block number in the forked chain
-	postponed, _ := types.NewTransaction(0, addr1, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key1)
-	swapped, _ := types.NewTransaction(1, addr1, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key1)
+	postponed, _ := types.SignTx(types.NewTransaction(0, addr1, big.NewInt(1000), params.TxGas, nil, nil), signer, key1)
+	swapped, _ := types.SignTx(types.NewTransaction(1, addr1, big.NewInt(1000), params.TxGas, nil, nil), signer, key1)
 
 	// Create two transactions that will be dropped by the forked chain:
 	//  - pastDrop: transaction dropped retroactively from a past block
@@ -900,13 +900,13 @@ func TestChainTxReorgs(t *testing.T) {
 	chain, _ := GenerateChain(params.TestChainConfig, genesis, db, 3, func(i int, gen *BlockGen) {
 		switch i {
 		case 0:
-			pastDrop, _ = types.NewTransaction(gen.TxNonce(addr2), addr2, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key2)
+			pastDrop, _ = types.SignTx(types.NewTransaction(gen.TxNonce(addr2), addr2, big.NewInt(1000), params.TxGas, nil, nil), signer, key2)
 
 			gen.AddTx(pastDrop)  // This transaction will be dropped in the fork from below the split point
 			gen.AddTx(postponed) // This transaction will be postponed till block #3 in the fork
 
 		case 2:
-			freshDrop, _ = types.NewTransaction(gen.TxNonce(addr2), addr2, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key2)
+			freshDrop, _ = types.SignTx(types.NewTransaction(gen.TxNonce(addr2), addr2, big.NewInt(1000), params.TxGas, nil, nil), signer, key2)
 
 			gen.AddTx(freshDrop) // This transaction will be dropped in the fork from exactly at the split point
 			gen.AddTx(swapped)   // This transaction will be swapped out at the exact height
@@ -925,18 +925,18 @@ func TestChainTxReorgs(t *testing.T) {
 	chain, _ = GenerateChain(params.TestChainConfig, genesis, db, 5, func(i int, gen *BlockGen) {
 		switch i {
 		case 0:
-			pastAdd, _ = types.NewTransaction(gen.TxNonce(addr3), addr3, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key3)
+			pastAdd, _ = types.SignTx(types.NewTransaction(gen.TxNonce(addr3), addr3, big.NewInt(1000), params.TxGas, nil, nil), signer, key3)
 			gen.AddTx(pastAdd) // This transaction needs to be injected during reorg
 
 		case 2:
 			gen.AddTx(postponed) // This transaction was postponed from block #1 in the original chain
 			gen.AddTx(swapped)   // This transaction was swapped from the exact current spot in the original chain
 
-			freshAdd, _ = types.NewTransaction(gen.TxNonce(addr3), addr3, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key3)
+			freshAdd, _ = types.SignTx(types.NewTransaction(gen.TxNonce(addr3), addr3, big.NewInt(1000), params.TxGas, nil, nil), signer, key3)
 			gen.AddTx(freshAdd) // This transaction will be added exactly at reorg time
 
 		case 3:
-			futureAdd, _ = types.NewTransaction(gen.TxNonce(addr3), addr3, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key3)
+			futureAdd, _ = types.SignTx(types.NewTransaction(gen.TxNonce(addr3), addr3, big.NewInt(1000), params.TxGas, nil, nil), signer, key3)
 			gen.AddTx(futureAdd) // This transaction will be added after a full reorg
 		}
 	})
@@ -995,7 +995,7 @@ func TestLogReorgs(t *testing.T) {
 	subs := evmux.Subscribe(RemovedLogsEvent{})
 	chain, _ := GenerateChain(params.TestChainConfig, genesis, db, 2, func(i int, gen *BlockGen) {
 		if i == 1 {
-			tx, err := types.NewContractCreation(gen.TxNonce(addr1), new(big.Int), big.NewInt(1000000), new(big.Int), code).SignECDSA(signer, key1)
+			tx, err := types.SignTx(types.NewContractCreation(gen.TxNonce(addr1), new(big.Int), big.NewInt(1000000), new(big.Int), code), signer, key1)
 			if err != nil {
 				t.Fatalf("failed to create tx: %v", err)
 			}
@@ -1035,7 +1035,7 @@ func TestReorgSideEvent(t *testing.T) {
 	}
 
 	replacementBlocks, _ := GenerateChain(params.TestChainConfig, genesis, db, 4, func(i int, gen *BlockGen) {
-		tx, err := types.NewContractCreation(gen.TxNonce(addr1), new(big.Int), big.NewInt(1000000), new(big.Int), nil).SignECDSA(signer, key1)
+		tx, err := types.SignTx(types.NewContractCreation(gen.TxNonce(addr1), new(big.Int), big.NewInt(1000000), new(big.Int), nil), signer, key1)
 		if i == 2 {
 			gen.OffsetTime(-1)
 		}
@@ -1152,7 +1152,7 @@ func TestEIP155Transition(t *testing.T) {
 			tx      *types.Transaction
 			err     error
 			basicTx = func(signer types.Signer) (*types.Transaction, error) {
-				return types.NewTransaction(block.TxNonce(address), common.Address{}, new(big.Int), big.NewInt(21000), new(big.Int), nil).SignECDSA(signer, key)
+				return types.SignTx(types.NewTransaction(block.TxNonce(address), common.Address{}, new(big.Int), big.NewInt(21000), new(big.Int), nil), signer, key)
 			}
 		)
 		switch i {
@@ -1215,7 +1215,7 @@ func TestEIP155Transition(t *testing.T) {
 			tx      *types.Transaction
 			err     error
 			basicTx = func(signer types.Signer) (*types.Transaction, error) {
-				return types.NewTransaction(block.TxNonce(address), common.Address{}, new(big.Int), big.NewInt(21000), new(big.Int), nil).SignECDSA(signer, key)
+				return types.SignTx(types.NewTransaction(block.TxNonce(address), common.Address{}, new(big.Int), big.NewInt(21000), new(big.Int), nil), signer, key)
 			}
 		)
 		switch i {
@@ -1260,11 +1260,11 @@ func TestEIP161AccountRemoval(t *testing.T) {
 		)
 		switch i {
 		case 0:
-			tx, err = types.NewTransaction(block.TxNonce(address), theAddr, new(big.Int), big.NewInt(21000), new(big.Int), nil).SignECDSA(signer, key)
+			tx, err = types.SignTx(types.NewTransaction(block.TxNonce(address), theAddr, new(big.Int), big.NewInt(21000), new(big.Int), nil), signer, key)
 		case 1:
-			tx, err = types.NewTransaction(block.TxNonce(address), theAddr, new(big.Int), big.NewInt(21000), new(big.Int), nil).SignECDSA(signer, key)
+			tx, err = types.SignTx(types.NewTransaction(block.TxNonce(address), theAddr, new(big.Int), big.NewInt(21000), new(big.Int), nil), signer, key)
 		case 2:
-			tx, err = types.NewTransaction(block.TxNonce(address), theAddr, new(big.Int), big.NewInt(21000), new(big.Int), nil).SignECDSA(signer, key)
+			tx, err = types.SignTx(types.NewTransaction(block.TxNonce(address), theAddr, new(big.Int), big.NewInt(21000), new(big.Int), nil), signer, key)
 		}
 		if err != nil {
 			t.Fatal(err)
diff --git a/core/chain_makers_test.go b/core/chain_makers_test.go
index 487cd6e18..942f4ace2 100644
--- a/core/chain_makers_test.go
+++ b/core/chain_makers_test.go
@@ -55,13 +55,13 @@ func ExampleGenerateChain() {
 		switch i {
 		case 0:
 			// In block 1, addr1 sends addr2 some ether.
-			tx, _ := types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(signer, key1)
+			tx, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(10000), params.TxGas, nil, nil), signer, key1)
 			gen.AddTx(tx)
 		case 1:
 			// In block 2, addr1 sends some more ether to addr2.
 			// addr2 passes it on to addr3.
-			tx1, _ := types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key1)
-			tx2, _ := types.NewTransaction(gen.TxNonce(addr2), addr3, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, key2)
+			tx1, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr1), addr2, big.NewInt(1000), params.TxGas, nil, nil), signer, key1)
+			tx2, _ := types.SignTx(types.NewTransaction(gen.TxNonce(addr2), addr3, big.NewInt(1000), params.TxGas, nil, nil), signer, key2)
 			gen.AddTx(tx1)
 			gen.AddTx(tx2)
 		case 2:
diff --git a/core/tx_pool_test.go b/core/tx_pool_test.go
index f5fcac19f..98a34b757 100644
--- a/core/tx_pool_test.go
+++ b/core/tx_pool_test.go
@@ -32,7 +32,7 @@ import (
 )
 
 func transaction(nonce uint64, gaslimit *big.Int, key *ecdsa.PrivateKey) *types.Transaction {
-	tx, _ := types.NewTransaction(nonce, common.Address{}, big.NewInt(100), gaslimit, big.NewInt(1), nil).SignECDSA(types.HomesteadSigner{}, key)
+	tx, _ := types.SignTx(types.NewTransaction(nonce, common.Address{}, big.NewInt(100), gaslimit, big.NewInt(1), nil), types.HomesteadSigner{}, key)
 	return tx
 }
 
@@ -238,7 +238,7 @@ func TestRemoveTx(t *testing.T) {
 func TestNegativeValue(t *testing.T) {
 	pool, key := setupTxPool()
 
-	tx, _ := types.NewTransaction(0, common.Address{}, big.NewInt(-1), big.NewInt(100), big.NewInt(1), nil).SignECDSA(types.HomesteadSigner{}, key)
+	tx, _ := types.SignTx(types.NewTransaction(0, common.Address{}, big.NewInt(-1), big.NewInt(100), big.NewInt(1), nil), types.HomesteadSigner{}, key)
 	from, _ := deriveSender(tx)
 	currentState, _ := pool.currentState()
 	currentState.AddBalance(from, big.NewInt(1))
@@ -287,9 +287,9 @@ func TestTransactionDoubleNonce(t *testing.T) {
 	resetState()
 
 	signer := types.HomesteadSigner{}
-	tx1, _ := types.NewTransaction(0, common.Address{}, big.NewInt(100), big.NewInt(100000), big.NewInt(1), nil).SignECDSA(signer, key)
-	tx2, _ := types.NewTransaction(0, common.Address{}, big.NewInt(100), big.NewInt(1000000), big.NewInt(2), nil).SignECDSA(signer, key)
-	tx3, _ := types.NewTransaction(0, common.Address{}, big.NewInt(100), big.NewInt(1000000), big.NewInt(1), nil).SignECDSA(signer, key)
+	tx1, _ := types.SignTx(types.NewTransaction(0, common.Address{}, big.NewInt(100), big.NewInt(100000), big.NewInt(1), nil), signer, key)
+	tx2, _ := types.SignTx(types.NewTransaction(0, common.Address{}, big.NewInt(100), big.NewInt(1000000), big.NewInt(2), nil), signer, key)
+	tx3, _ := types.SignTx(types.NewTransaction(0, common.Address{}, big.NewInt(100), big.NewInt(1000000), big.NewInt(1), nil), signer, key)
 
 	// Add the first two transaction, ensure higher priced stays only
 	if err := pool.add(tx1); err != nil {
diff --git a/core/types/transaction.go b/core/types/transaction.go
index 87b54ab30..e610671d3 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -18,7 +18,6 @@ package types
 
 import (
 	"container/heap"
-	"crypto/ecdsa"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -293,14 +292,6 @@ func (tx *Transaction) AsMessage(s Signer) (Message, error) {
 	return msg, err
 }
 
-// SignECDSA signs the transaction using the given signer and private key
-//
-// XXX This only makes for a nice API: NewTx(...).SignECDSA(signer, prv). Should
-// we keep this?
-func (tx *Transaction) SignECDSA(signer Signer, prv *ecdsa.PrivateKey) (*Transaction, error) {
-	return signer.SignECDSA(tx, prv)
-}
-
 // WithSignature returns a new transaction with the given signature.
 // This signature needs to be formatted as described in the yellow paper (v+27).
 func (tx *Transaction) WithSignature(signer Signer, sig []byte) (*Transaction, error) {
diff --git a/core/types/transaction_signing.go b/core/types/transaction_signing.go
index 8952bd574..4ebc789a5 100644
--- a/core/types/transaction_signing.go
+++ b/core/types/transaction_signing.go
@@ -50,8 +50,8 @@ func MakeSigner(config *params.ChainConfig, blockNumber *big.Int) Signer {
 	return signer
 }
 
-// SignECDSA signs the transaction using the given signer and private key
-func SignECDSA(s Signer, tx *Transaction, prv *ecdsa.PrivateKey) (*Transaction, error) {
+// SignTx signs the transaction using the given signer and private key
+func SignTx(tx *Transaction, s Signer, prv *ecdsa.PrivateKey) (*Transaction, error) {
 	h := s.Hash(tx)
 	sig, err := crypto.Sign(h[:], prv)
 	if err != nil {
@@ -96,9 +96,8 @@ type Signer interface {
 	Hash(tx *Transaction) common.Hash
 	// PubilcKey returns the public key derived from the signature
 	PublicKey(tx *Transaction) ([]byte, error)
-	// SignECDSA signs the transaction with the given and returns a copy of the tx
-	SignECDSA(tx *Transaction, prv *ecdsa.PrivateKey) (*Transaction, error)
-	// WithSignature returns a copy of the transaction with the given signature
+	// WithSignature returns a copy of the transaction with the given signature.
+	// The signature must be encoded in [R || S || V] format where V is 0 or 1.
 	WithSignature(tx *Transaction, sig []byte) (*Transaction, error)
 	// Checks for equality on the signers
 	Equal(Signer) bool
@@ -124,10 +123,6 @@ func (s EIP155Signer) Equal(s2 Signer) bool {
 	return ok && eip155.chainId.Cmp(s.chainId) == 0
 }
 
-func (s EIP155Signer) SignECDSA(tx *Transaction, prv *ecdsa.PrivateKey) (*Transaction, error) {
-	return SignECDSA(s, tx, prv)
-}
-
 func (s EIP155Signer) PublicKey(tx *Transaction) ([]byte, error) {
 	// if the transaction is not protected fall back to homestead signer
 	if !tx.Protected() {
@@ -193,15 +188,6 @@ func (s EIP155Signer) Hash(tx *Transaction) common.Hash {
 	})
 }
 
-func (s EIP155Signer) SigECDSA(tx *Transaction, prv *ecdsa.PrivateKey) (*Transaction, error) {
-	h := s.Hash(tx)
-	sig, err := crypto.Sign(h[:], prv)
-	if err != nil {
-		return nil, err
-	}
-	return s.WithSignature(tx, sig)
-}
-
 // HomesteadTransaction implements TransactionInterface using the
 // homestead rules.
 type HomesteadSigner struct{ FrontierSigner }
@@ -224,15 +210,6 @@ func (hs HomesteadSigner) WithSignature(tx *Transaction, sig []byte) (*Transacti
 	return cpy, nil
 }
 
-func (hs HomesteadSigner) SignECDSA(tx *Transaction, prv *ecdsa.PrivateKey) (*Transaction, error) {
-	h := hs.Hash(tx)
-	sig, err := crypto.Sign(h[:], prv)
-	if err != nil {
-		return nil, err
-	}
-	return hs.WithSignature(tx, sig)
-}
-
 func (hs HomesteadSigner) PublicKey(tx *Transaction) ([]byte, error) {
 	if tx.data.V.BitLen() > 8 {
 		return nil, ErrInvalidSig
@@ -280,15 +257,6 @@ func (fs FrontierSigner) WithSignature(tx *Transaction, sig []byte) (*Transactio
 	return cpy, nil
 }
 
-func (fs FrontierSigner) SignECDSA(tx *Transaction, prv *ecdsa.PrivateKey) (*Transaction, error) {
-	h := fs.Hash(tx)
-	sig, err := crypto.Sign(h[:], prv)
-	if err != nil {
-		return nil, err
-	}
-	return fs.WithSignature(tx, sig)
-}
-
 // Hash returns the hash to be sned by the sender.
 // It does not uniquely identify the transaction.
 func (fs FrontierSigner) Hash(tx *Transaction) common.Hash {
diff --git a/core/types/transaction_signing_test.go b/core/types/transaction_signing_test.go
index dc618e570..3216fcfad 100644
--- a/core/types/transaction_signing_test.go
+++ b/core/types/transaction_signing_test.go
@@ -30,7 +30,7 @@ func TestEIP155Signing(t *testing.T) {
 	addr := crypto.PubkeyToAddress(key.PublicKey)
 
 	signer := NewEIP155Signer(big.NewInt(18))
-	tx, err := NewTransaction(0, addr, new(big.Int), new(big.Int), new(big.Int), nil).SignECDSA(signer, key)
+	tx, err := SignTx(NewTransaction(0, addr, new(big.Int), new(big.Int), new(big.Int), nil), signer, key)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -49,7 +49,7 @@ func TestEIP155ChainId(t *testing.T) {
 	addr := crypto.PubkeyToAddress(key.PublicKey)
 
 	signer := NewEIP155Signer(big.NewInt(18))
-	tx, err := NewTransaction(0, addr, new(big.Int), new(big.Int), new(big.Int), nil).SignECDSA(signer, key)
+	tx, err := SignTx(NewTransaction(0, addr, new(big.Int), new(big.Int), new(big.Int), nil), signer, key)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -62,7 +62,7 @@ func TestEIP155ChainId(t *testing.T) {
 	}
 
 	tx = NewTransaction(0, addr, new(big.Int), new(big.Int), new(big.Int), nil)
-	tx, err = tx.SignECDSA(HomesteadSigner{}, key)
+	tx, err = SignTx(tx, HomesteadSigner{}, key)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -121,7 +121,7 @@ func TestChainId(t *testing.T) {
 	tx := NewTransaction(0, common.Address{}, new(big.Int), new(big.Int), new(big.Int), nil)
 
 	var err error
-	tx, err = tx.SignECDSA(NewEIP155Signer(big.NewInt(1)), key)
+	tx, err = SignTx(tx, NewEIP155Signer(big.NewInt(1)), key)
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/core/types/transaction_test.go b/core/types/transaction_test.go
index 4a38462e3..f52f80d34 100644
--- a/core/types/transaction_test.go
+++ b/core/types/transaction_test.go
@@ -138,7 +138,7 @@ func TestTransactionPriceNonceSort(t *testing.T) {
 	for start, key := range keys {
 		addr := crypto.PubkeyToAddress(key.PublicKey)
 		for i := 0; i < 25; i++ {
-			tx, _ := NewTransaction(uint64(start+i), common.Address{}, big.NewInt(100), big.NewInt(100), big.NewInt(int64(start+i)), nil).SignECDSA(signer, key)
+			tx, _ := SignTx(NewTransaction(uint64(start+i), common.Address{}, big.NewInt(100), big.NewInt(100), big.NewInt(int64(start+i)), nil), signer, key)
 			groups[addr] = append(groups[addr], tx)
 		}
 	}
diff --git a/eth/downloader/downloader_test.go b/eth/downloader/downloader_test.go
index 86638ae2d..b43edf53e 100644
--- a/eth/downloader/downloader_test.go
+++ b/eth/downloader/downloader_test.go
@@ -119,7 +119,7 @@ func (dl *downloadTester) makeChain(n int, seed byte, parent *types.Block, paren
 		// If the block number is multiple of 3, send a bonus transaction to the miner
 		if parent == dl.genesis && i%3 == 0 {
 			signer := types.MakeSigner(params.TestChainConfig, block.Number())
-			tx, err := types.NewTransaction(block.TxNonce(testAddress), common.Address{seed}, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, testKey)
+			tx, err := types.SignTx(types.NewTransaction(block.TxNonce(testAddress), common.Address{seed}, big.NewInt(1000), params.TxGas, nil, nil), signer, testKey)
 			if err != nil {
 				panic(err)
 			}
diff --git a/eth/fetcher/fetcher_test.go b/eth/fetcher/fetcher_test.go
index 426bfd542..2e28541ab 100644
--- a/eth/fetcher/fetcher_test.go
+++ b/eth/fetcher/fetcher_test.go
@@ -51,7 +51,7 @@ func makeChain(n int, seed byte, parent *types.Block) ([]common.Hash, map[common
 		// If the block number is multiple of 3, send a bonus transaction to the miner
 		if parent == genesis && i%3 == 0 {
 			signer := types.MakeSigner(params.TestChainConfig, block.Number())
-			tx, err := types.NewTransaction(block.TxNonce(testAddress), common.Address{seed}, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, testKey)
+			tx, err := types.SignTx(types.NewTransaction(block.TxNonce(testAddress), common.Address{seed}, big.NewInt(1000), params.TxGas, nil, nil), signer, testKey)
 			if err != nil {
 				panic(err)
 			}
diff --git a/eth/handler_test.go b/eth/handler_test.go
index f599e9e86..6900f7808 100644
--- a/eth/handler_test.go
+++ b/eth/handler_test.go
@@ -311,13 +311,13 @@ func testGetNodeData(t *testing.T, protocol int) {
 		switch i {
 		case 0:
 			// In block 1, the test bank sends account #1 some ether.
-			tx, _ := types.NewTransaction(block.TxNonce(testBank.Address), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(signer, testBankKey)
+			tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank.Address), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil), signer, testBankKey)
 			block.AddTx(tx)
 		case 1:
 			// In block 2, the test bank sends some more ether to account #1.
 			// acc1Addr passes it on to account #2.
-			tx1, _ := types.NewTransaction(block.TxNonce(testBank.Address), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, testBankKey)
-			tx2, _ := types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, acc1Key)
+			tx1, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank.Address), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, testBankKey)
+			tx2, _ := types.SignTx(types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, acc1Key)
 			block.AddTx(tx1)
 			block.AddTx(tx2)
 		case 2:
@@ -403,13 +403,13 @@ func testGetReceipt(t *testing.T, protocol int) {
 		switch i {
 		case 0:
 			// In block 1, the test bank sends account #1 some ether.
-			tx, _ := types.NewTransaction(block.TxNonce(testBank.Address), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(signer, testBankKey)
+			tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank.Address), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil), signer, testBankKey)
 			block.AddTx(tx)
 		case 1:
 			// In block 2, the test bank sends some more ether to account #1.
 			// acc1Addr passes it on to account #2.
-			tx1, _ := types.NewTransaction(block.TxNonce(testBank.Address), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, testBankKey)
-			tx2, _ := types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, acc1Key)
+			tx1, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBank.Address), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, testBankKey)
+			tx2, _ := types.SignTx(types.NewTransaction(block.TxNonce(acc1Addr), acc2Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, acc1Key)
 			block.AddTx(tx1)
 			block.AddTx(tx2)
 		case 2:
diff --git a/eth/helper_test.go b/eth/helper_test.go
index bd6b2d0da..a718a6d21 100644
--- a/eth/helper_test.go
+++ b/eth/helper_test.go
@@ -124,7 +124,7 @@ func (p *testTxPool) Pending() (map[common.Address]types.Transactions, error) {
 // newTestTransaction create a new dummy transaction.
 func newTestTransaction(from *ecdsa.PrivateKey, nonce uint64, datasize int) *types.Transaction {
 	tx := types.NewTransaction(nonce, common.Address{}, big.NewInt(0), big.NewInt(100000), big.NewInt(0), make([]byte, datasize))
-	tx, _ = tx.SignECDSA(types.HomesteadSigner{}, from)
+	tx, _ = types.SignTx(tx, types.HomesteadSigner{}, from)
 	return tx
 }
 
diff --git a/les/helper_test.go b/les/helper_test.go
index 2df3faab2..ec98389cb 100644
--- a/les/helper_test.go
+++ b/les/helper_test.go
@@ -79,17 +79,17 @@ func testChainGen(i int, block *core.BlockGen) {
 	switch i {
 	case 0:
 		// In block 1, the test bank sends account #1 some ether.
-		tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(signer, testBankKey)
+		tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil), signer, testBankKey)
 		block.AddTx(tx)
 	case 1:
 		// In block 2, the test bank sends some more ether to account #1.
 		// acc1Addr passes it on to account #2.
 		// acc1Addr creates a test contract.
-		tx1, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, testBankKey)
+		tx1, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, testBankKey)
 		nonce := block.TxNonce(acc1Addr)
-		tx2, _ := types.NewTransaction(nonce, acc2Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, acc1Key)
+		tx2, _ := types.SignTx(types.NewTransaction(nonce, acc2Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, acc1Key)
 		nonce++
-		tx3, _ := types.NewContractCreation(nonce, big.NewInt(0), big.NewInt(200000), big.NewInt(0), testContractCode).SignECDSA(signer, acc1Key)
+		tx3, _ := types.SignTx(types.NewContractCreation(nonce, big.NewInt(0), big.NewInt(200000), big.NewInt(0), testContractCode), signer, acc1Key)
 		testContractAddr = crypto.CreateAddress(acc1Addr, nonce)
 		block.AddTx(tx1)
 		block.AddTx(tx2)
@@ -99,7 +99,7 @@ func testChainGen(i int, block *core.BlockGen) {
 		block.SetCoinbase(acc2Addr)
 		block.SetExtra([]byte("yeehaw"))
 		data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001")
-		tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data).SignECDSA(signer, testBankKey)
+		tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data), signer, testBankKey)
 		block.AddTx(tx)
 	case 3:
 		// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
@@ -110,7 +110,7 @@ func testChainGen(i int, block *core.BlockGen) {
 		b3.Extra = []byte("foo")
 		block.AddUncle(b3)
 		data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002")
-		tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data).SignECDSA(signer, testBankKey)
+		tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data), signer, testBankKey)
 		block.AddTx(tx)
 	}
 }
@@ -217,7 +217,7 @@ func (p *testTxPool) GetTransactions() types.Transactions {
 // newTestTransaction create a new dummy transaction.
 func newTestTransaction(from *ecdsa.PrivateKey, nonce uint64, datasize int) *types.Transaction {
 	tx := types.NewTransaction(nonce, common.Address{}, big.NewInt(0), big.NewInt(100000), big.NewInt(0), make([]byte, datasize))
-	tx, _ = tx.SignECDSA(types.HomesteadSigner{}, from)
+	tx, _ = types.SignTx(tx, types.HomesteadSigner{}, from)
 
 	return tx
 }
diff --git a/light/odr_test.go b/light/odr_test.go
index a6c956e9a..2dcfa40d9 100644
--- a/light/odr_test.go
+++ b/light/odr_test.go
@@ -205,17 +205,17 @@ func testChainGen(i int, block *core.BlockGen) {
 	switch i {
 	case 0:
 		// In block 1, the test bank sends account #1 some ether.
-		tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(signer, testBankKey)
+		tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil), signer, testBankKey)
 		block.AddTx(tx)
 	case 1:
 		// In block 2, the test bank sends some more ether to account #1.
 		// acc1Addr passes it on to account #2.
 		// acc1Addr creates a test contract.
-		tx1, _ := types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, testBankKey)
+		tx1, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), acc1Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, testBankKey)
 		nonce := block.TxNonce(acc1Addr)
-		tx2, _ := types.NewTransaction(nonce, acc2Addr, big.NewInt(1000), params.TxGas, nil, nil).SignECDSA(signer, acc1Key)
+		tx2, _ := types.SignTx(types.NewTransaction(nonce, acc2Addr, big.NewInt(1000), params.TxGas, nil, nil), signer, acc1Key)
 		nonce++
-		tx3, _ := types.NewContractCreation(nonce, big.NewInt(0), big.NewInt(1000000), big.NewInt(0), testContractCode).SignECDSA(signer, acc1Key)
+		tx3, _ := types.SignTx(types.NewContractCreation(nonce, big.NewInt(0), big.NewInt(1000000), big.NewInt(0), testContractCode), signer, acc1Key)
 		testContractAddr = crypto.CreateAddress(acc1Addr, nonce)
 		block.AddTx(tx1)
 		block.AddTx(tx2)
@@ -225,7 +225,7 @@ func testChainGen(i int, block *core.BlockGen) {
 		block.SetCoinbase(acc2Addr)
 		block.SetExtra([]byte("yeehaw"))
 		data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000000000001")
-		tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data).SignECDSA(signer, testBankKey)
+		tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data), signer, testBankKey)
 		block.AddTx(tx)
 	case 3:
 		// Block 4 includes blocks 2 and 3 as uncle headers (with modified extra data).
@@ -236,7 +236,7 @@ func testChainGen(i int, block *core.BlockGen) {
 		b3.Extra = []byte("foo")
 		block.AddUncle(b3)
 		data := common.Hex2Bytes("C16431B900000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002")
-		tx, _ := types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data).SignECDSA(signer, testBankKey)
+		tx, _ := types.SignTx(types.NewTransaction(block.TxNonce(testBankAddress), testContractAddr, big.NewInt(0), big.NewInt(100000), nil, data), signer, testBankKey)
 		block.AddTx(tx)
 	}
 }
diff --git a/light/txpool_test.go b/light/txpool_test.go
index 759b6b8ab..61d7c1c49 100644
--- a/light/txpool_test.go
+++ b/light/txpool_test.go
@@ -74,7 +74,7 @@ func txPoolTestChainGen(i int, block *core.BlockGen) {
 
 func TestTxPool(t *testing.T) {
 	for i, _ := range testTx {
-		testTx[i], _ = types.NewTransaction(uint64(i), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil).SignECDSA(types.HomesteadSigner{}, testBankKey)
+		testTx[i], _ = types.SignTx(types.NewTransaction(uint64(i), acc1Addr, big.NewInt(10000), params.TxGas, nil, nil), types.HomesteadSigner{}, testBankKey)
 	}
 
 	var (