Merge #12436: [rpc] Adds a functional test to validate the transaction version number in the RPC output

09b30db Asserts that the tx version number is a signed 32-bit integer. (251)

Pull request description:

  This PR attempts to resolve #11561 by addressing the feedback from @MarcoFalke; and @gmaxwell in #12430.

  Commit 30e9d24 adds a functional test to `rpc_rawtransaction.py` to assert that the transaction version number in the RPC output is a signed 32-bit integer.

  The functional test uses the raw transaction data from Mainnet transaction `c659729a7fea5071361c2c1a68551ca2bf77679b27086cc415adeeb03852e369`.

Tree-SHA512: d78f3120b9aa04537561ab5584769a838b25e162c5caa6e1543256fb27538aa4c708c939fb5ba93ccb3fa676c2d92ce8eb9cc78869f80ac96be64a7bec7bebd0

test/functional/rpc_rawtransaction.py

@@ -14,13 +14,10 @@ Test the following RPCs:
 
 from collections import OrderedDict
 from io import BytesIO
+from test_framework.messages import CTransaction, ToHex
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.messages import (
-    CTransaction,
-)
 from test_framework.util import *
 
-
 class multidict(dict):
     """Dictionary that allows duplicate keys.
 
@@ -363,5 +360,23 @@ class RawTransactionsTest(BitcoinTestFramework):
         decrawtx= self.nodes[0].decoderawtransaction(rawtx)
         assert_equal(decrawtx['vin'][0]['sequence'], 4294967294)
 
+        ####################################
+        # TRANSACTION VERSION NUMBER TESTS #
+        ####################################
+
+        # Test the minimum transaction version number that fits in a signed 32-bit integer.
+        tx = CTransaction()
+        tx.nVersion = -0x80000000
+        rawtx = ToHex(tx)
+        decrawtx = self.nodes[0].decoderawtransaction(rawtx)
+        assert_equal(decrawtx['version'], -0x80000000)
+
+        # Test the maximum transaction version number that fits in a signed 32-bit integer.
+        tx = CTransaction()
+        tx.nVersion = 0x7fffffff
+        rawtx = ToHex(tx)
+        decrawtx = self.nodes[0].decoderawtransaction(rawtx)
+        assert_equal(decrawtx['version'], 0x7fffffff)
+
 if __name__ == '__main__':
     RawTransactionsTest().main()