feat: add signature and public key for transactions

Author: b00f

examples/example_transfer_transaction_bls.py

@@ -18,12 +18,17 @@ def main() -> None:
     sec = PrivateKey.from_string(
         "TSECRET1PZF33H72N9PHXZATY5URH5SS4M33VVDFAWYVESL5JTLT9A00TNWKQYNGM6Z"
     )
+    pub = sec.public_key()
 
     tx = Transaction.create_transfer_tx(lock_time, sender, receiver, amount, fee, memo)
-    signed_tx = tx.sign(sec)
+    signed_data = tx.sign(sec)
 
-    print(f"Signed transaction hex: {signed_tx.hex()}")
+    if pub.verify(bytes(tx.sign_bytes()), tx.signature):
+        print("Signature verification succeeded")
+    else:
+        print("Signature verification failed")
 
+    print(f"Signed transaction hex: {signed_data.hex()}")
 
 if __name__ == "__main__":
     main()

examples/example_transfer_transaction_ed25519.py

@@ -18,10 +18,16 @@ def main() -> None:
     sec = PrivateKey.from_string(
         "TSECRET1RGLSGPYLQRVET27AZUVS9TSP8MPGF9LH4U4RKKARMCATFK9L0KUCS7DCC09"
     )
+    pub = sec.public_key()
 
     tx = Transaction.create_transfer_tx(lock_time, sender, receiver, amount, fee, memo)
     signed_tx = tx.sign(sec)
 
+    if pub.verify(bytes(tx.sign_bytes()), tx.signature):
+        print("Signature verification succeeded")
+    else:
+        print("Signature verification failed")
+
     print(f"Signed transaction hex: {signed_tx.hex()}")
 
 

pactus/transaction/transaction.py

@@ -1,7 +1,9 @@
 from pactus.amount import Amount
 from pactus.crypto.address import Address
 from pactus.crypto.private_key import PrivateKey
+from pactus.crypto.public_key import PublicKey
 from pactus.encoding import encoding
+from pactus.crypto.signature import Signature
 
 from ._payload import (
     BondPayload,
@@ -11,6 +13,8 @@
     WithdrawPayload,
 )
 
+FLAG_STRIPPED_PUBLIC_KEY = 0x01
+FLAG_NOT_SIGNED = 0x02
 
 class Transaction:
     def __init__(
@@ -26,6 +30,8 @@ def __init__(
         self.version = 1
         self.fee = fee
         self.payload = payload
+        self.public_key: PublicKey = None
+        self.signature: Signature = None
 
     @classmethod
     def create_transfer_tx(
@@ -129,4 +135,8 @@ def sign(self, private_key: PrivateKey) -> bytes:
         encoding.append_fixed_bytes(buf, sig.raw_bytes())
         encoding.append_fixed_bytes(buf, pub.raw_bytes())
 
+        self.public_key = pub
+        self.signature = sig
+        self.flags |= FLAG_NOT_SIGNED
+
         return buf