Fix example/history.py

Author: mohanson

example/history.py

@@ -20,11 +20,11 @@
 for e in pxsol.rpc.get_signatures_for_address(args.addr, {'limit': args.limit}):
     tx_meta = pxsol.rpc.get_transaction(e['signature'], {'encoding': 'base64'})
     tx_byte = bytearray(base64.b64decode(tx_meta['transaction'][0]))
-    tx_verb = tx_byte[1 + tx_byte[0] * 64]
+    tx_verb = pxsol.core.TransactionClassify.version(tx_byte)
     match tx_verb:
-        case 0x00:
-            tx = pxsol.core.Transaction.serialize_decode(tx_byte)
-            print(tx)
         case 0x80:
             tx = pxsol.core.TransactionV0.serialize_decode(tx_byte)
             print(tx)
+        case _:
+            tx = pxsol.core.Transaction.serialize_decode(tx_byte)
+            print(tx)

pxsol/core.py

@@ -565,6 +565,17 @@ def sign(self, prikey: typing.List[PriKey]) -> None:
             self.signatures.append(k.sign(m))
 
 
+class TransactionClassify:
+    # Classify the transaction version type.
+
+    @classmethod
+    def version(cls, data: bytearray) -> int:
+        # Get the transaction version type.
+        # - n <= 0x7f: transaction legacy
+        # - n == 0x80: transaction v0
+        return data[1 + data[0] * 64]
+
+
 class TokenExtensionMetadataPointer:
     # Metadata pointer extension data for mints.