diff --git a/core/types/transaction.go b/core/types/transaction.go
index 653498a851..36865ce5de 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -195,6 +195,19 @@ func (tx *Transaction) To() *common.Address {
 	return &to
 }
 
+func (tx *Transaction) From() *common.Address {
+	if tx.data.V != nil {
+		signer := deriveSigner(tx.data.V)
+		if f, err := Sender(signer, tx); err != nil {
+			return nil
+		} else {
+			return &f
+		}
+	} else {
+		return nil
+	}
+}
+
 // Hash hashes the RLP encoding of tx.
 // It uniquely identifies the transaction.
 func (tx *Transaction) Hash() common.Hash {
@@ -274,6 +287,13 @@ func (tx *Transaction) IsSpecialTransaction() bool {
 	return tx.To().String() == common.RandomizeSMC || tx.To().String() == common.BlockSigners
 }
 
+func (tx *Transaction) IsSigningTransaction() bool {
+	if tx.To() == nil {
+		return false
+	}
+	return tx.To().String() == common.BlockSigners
+}
+
 func (tx *Transaction) String() string {
 	var from, to string
 	if tx.data.V != nil {
@@ -505,4 +525,4 @@ func (m Message) Value() *big.Int      { return m.amount }
 func (m Message) Gas() uint64          { return m.gasLimit }
 func (m Message) Nonce() uint64        { return m.nonce }
 func (m Message) Data() []byte         { return m.data }
-func (m Message) CheckNonce() bool     { return m.checkNonce }
+func (m Message) CheckNonce() bool     { return m.checkNonce }
\ No newline at end of file