diff --git a/test/functional/feature_cltv.py b/test/functional/feature_cltv.py
index ccf2114dba..06b5bf9698 100755
--- a/test/functional/feature_cltv.py
+++ b/test/functional/feature_cltv.py
@@ -163,7 +163,7 @@ class BIP65Test(BitcoinTestFramework):
             # First we show that this tx is valid except for CLTV by getting it
             # rejected from the mempool for exactly that reason.
             spendtx_txid = spendtx.txid_hex
-            spendtx_wtxid = spendtx.getwtxid()
+            spendtx_wtxid = spendtx.wtxid_hex
             assert_equal(
                 [{
                     'txid': spendtx_txid,
diff --git a/test/functional/feature_dersig.py b/test/functional/feature_dersig.py
index 01f8e544a7..9687b80de9 100755
--- a/test/functional/feature_dersig.py
+++ b/test/functional/feature_dersig.py
@@ -115,7 +115,7 @@ class BIP66Test(BitcoinTestFramework):
         # First we show that this tx is valid except for DERSIG by getting it
         # rejected from the mempool for exactly that reason.
         spendtx_txid = spendtx.txid_hex
-        spendtx_wtxid = spendtx.getwtxid()
+        spendtx_wtxid = spendtx.wtxid_hex
         assert_equal(
             [{
                 'txid': spendtx_txid,
diff --git a/test/functional/feature_segwit.py b/test/functional/feature_segwit.py
index d5f794c241..967b9e1e6e 100755
--- a/test/functional/feature_segwit.py
+++ b/test/functional/feature_segwit.py
@@ -251,7 +251,7 @@ class SegWitTest(BitcoinTestFramework):
         tx1 = tx_from_hex(tx1_hex)
 
         # Check that wtxid is properly reported in mempool entry (txid1)
-        assert_equal(self.nodes[0].getmempoolentry(txid1)["wtxid"], tx1.getwtxid())
+        assert_equal(self.nodes[0].getmempoolentry(txid1)["wtxid"], tx1.wtxid_hex)
 
         # Check that weight and vsize are properly reported in mempool entry (txid1)
         assert_equal(self.nodes[0].getmempoolentry(txid1)["vsize"], tx1.get_vsize())
@@ -267,7 +267,7 @@ class SegWitTest(BitcoinTestFramework):
         assert not tx.wit.is_null()
 
         # Check that wtxid is properly reported in mempool entry (txid2)
-        assert_equal(self.nodes[0].getmempoolentry(txid2)["wtxid"], tx.getwtxid())
+        assert_equal(self.nodes[0].getmempoolentry(txid2)["wtxid"], tx.wtxid_hex)
 
         # Check that weight and vsize are properly reported in mempool entry (txid2)
         assert_equal(self.nodes[0].getmempoolentry(txid2)["vsize"], tx.get_vsize())
@@ -289,7 +289,7 @@ class SegWitTest(BitcoinTestFramework):
         assert txid3 in template_txids
 
         # Check that wtxid is properly reported in mempool entry (txid3)
-        assert_equal(self.nodes[0].getmempoolentry(txid3)["wtxid"], tx.getwtxid())
+        assert_equal(self.nodes[0].getmempoolentry(txid3)["wtxid"], tx.wtxid_hex)
 
         # Check that weight and vsize are properly reported in mempool entry (txid3)
         assert_equal(self.nodes[0].getmempoolentry(txid3)["vsize"], tx.get_vsize())
diff --git a/test/functional/mempool_accept.py b/test/functional/mempool_accept.py
index 326ad78686..81c6ea3e5d 100755
--- a/test/functional/mempool_accept.py
+++ b/test/functional/mempool_accept.py
@@ -454,7 +454,7 @@ class MempoolAcceptanceTest(BitcoinTestFramework):
         anchor_spend.vout.append(CTxOut(anchor_value - int(fee*COIN), script_to_p2wsh_script(CScript([OP_TRUE]))))
         anchor_spend.wit.vtxinwit.append(CTxInWitness())
         # It's "segwit" but txid == wtxid since there is no witness data
-        assert_equal(anchor_spend.txid_hex, anchor_spend.getwtxid())
+        assert_equal(anchor_spend.txid_hex, anchor_spend.wtxid_hex)
 
         self.check_mempool_result(
             result_expected=[{'txid': anchor_spend.txid_hex, 'allowed': True, 'vsize': anchor_spend.get_vsize(), 'fees': { 'base': Decimal('0.00000700')}}],
diff --git a/test/functional/mempool_accept_wtxid.py b/test/functional/mempool_accept_wtxid.py
index ef99e9bddc..35983d8eb4 100755
--- a/test/functional/mempool_accept_wtxid.py
+++ b/test/functional/mempool_accept_wtxid.py
@@ -76,13 +76,13 @@ class MempoolWtxidTest(BitcoinTestFramework):
         child_one.vout.append(CTxOut(int(9.99996 * COIN), child_script_pubkey))
         child_one.wit.vtxinwit.append(CTxInWitness())
         child_one.wit.vtxinwit[0].scriptWitness.stack = [b'Preimage', b'\x01', witness_script]
-        child_one_wtxid = child_one.getwtxid()
+        child_one_wtxid = child_one.wtxid_hex
         child_one_txid = child_one.txid_hex
 
         # Create another identical transaction with witness solving second branch
         child_two = deepcopy(child_one)
         child_two.wit.vtxinwit[0].scriptWitness.stack = [b'', witness_script]
-        child_two_wtxid = child_two.getwtxid()
+        child_two_wtxid = child_two.wtxid_hex
         child_two_txid = child_two.txid_hex
 
         assert_equal(child_one_txid, child_two_txid)
diff --git a/test/functional/mempool_ephemeral_dust.py b/test/functional/mempool_ephemeral_dust.py
index 93bbbe9a45..fd77eac3e2 100755
--- a/test/functional/mempool_ephemeral_dust.py
+++ b/test/functional/mempool_ephemeral_dust.py
@@ -40,11 +40,11 @@ class EphemeralDustTest(BitcoinTestFramework):
         result["new_utxos"][0]["value"] = Decimal(result["tx"].vout[0].nValue) / COIN
         new_txid = result["tx"].txid_hex
         result["txid"]  = new_txid
-        result["wtxid"] = result["tx"].getwtxid()
+        result["wtxid"] = result["tx"].wtxid_hex
         result["hex"] = result["tx"].serialize().hex()
         for new_utxo in result["new_utxos"]:
             new_utxo["txid"] = new_txid
-            new_utxo["wtxid"] = result["tx"].getwtxid()
+            new_utxo["wtxid"] = result["tx"].wtxid_hex
 
         result["new_utxos"].append({"txid": new_txid, "vout": len(result["tx"].vout) - 1, "value": Decimal(output_value) / COIN, "height": 0, "coinbase": False, "confirmations": 0})
 
diff --git a/test/functional/mempool_limit.py b/test/functional/mempool_limit.py
index 791654a8c0..b9ee6a0a10 100755
--- a/test/functional/mempool_limit.py
+++ b/test/functional/mempool_limit.py
@@ -379,7 +379,7 @@ class MempoolLimitTest(BitcoinTestFramework):
 
         rich_parent_result = submitpackage_result["tx-results"][tx_rich["wtxid"]]
         poor_parent_result = submitpackage_result["tx-results"][tx_poor["wtxid"]]
-        child_result = submitpackage_result["tx-results"][tx_child["tx"].getwtxid()]
+        child_result = submitpackage_result["tx-results"][tx_child["tx"].wtxid_hex]
         assert_fee_amount(poor_parent_result["fees"]["base"], tx_poor["tx"].get_vsize(), relayfee)
         assert_equal(rich_parent_result["fees"]["base"], 0)
         assert_equal(child_result["fees"]["base"], DEFAULT_FEE)
@@ -392,11 +392,11 @@ class MempoolLimitTest(BitcoinTestFramework):
         package_vsize = tx_poor["tx"].get_vsize() + tx_child["tx"].get_vsize()
         assert_fee_amount(package_fees, package_vsize, poor_parent_result["fees"]["effective-feerate"])
         assert_fee_amount(package_fees, package_vsize, child_result["fees"]["effective-feerate"])
-        assert_equal([tx_poor["wtxid"], tx_child["tx"].getwtxid()], poor_parent_result["fees"]["effective-includes"])
-        assert_equal([tx_poor["wtxid"], tx_child["tx"].getwtxid()], child_result["fees"]["effective-includes"])
+        assert_equal([tx_poor["wtxid"], tx_child["tx"].wtxid_hex], poor_parent_result["fees"]["effective-includes"])
+        assert_equal([tx_poor["wtxid"], tx_child["tx"].wtxid_hex], child_result["fees"]["effective-includes"])
 
         # The node will broadcast each transaction, still abiding by its peer's fee filter
-        peer.wait_for_broadcast([tx["tx"].getwtxid() for tx in package_txns])
+        peer.wait_for_broadcast([tx["tx"].wtxid_hex for tx in package_txns])
 
         self.log.info("Check a package that passes mempoolminfee but is evicted immediately after submission")
         mempoolmin_feerate = node.getmempoolinfo()["mempoolminfee"]
diff --git a/test/functional/mempool_package_onemore.py b/test/functional/mempool_package_onemore.py
index fd54a8c3e1..74c5e34520 100755
--- a/test/functional/mempool_package_onemore.py
+++ b/test/functional/mempool_package_onemore.py
@@ -60,8 +60,8 @@ class MempoolPackagesTest(BitcoinTestFramework):
         txns_hex = [tx.serialize().hex() for tx in txns]
         assert_equal(self.nodes[0].testmempoolaccept(txns_hex)[0]["reject-reason"], "too-long-mempool-chain")
         pkg_result = self.nodes[0].submitpackage(txns_hex)
-        assert "too-long-mempool-chain" in pkg_result["tx-results"][txns[0].getwtxid()]["error"]
-        assert_equal(pkg_result["tx-results"][txns[1].getwtxid()]["error"], "bad-txns-inputs-missingorspent")
+        assert "too-long-mempool-chain" in pkg_result["tx-results"][txns[0].wtxid_hex]["error"]
+        assert_equal(pkg_result["tx-results"][txns[1].wtxid_hex]["error"], "bad-txns-inputs-missingorspent")
         # But not if it chains directly off the first transaction
         self.nodes[0].sendrawtransaction(replaceable_tx["hex"])
         # and the second chain should work just fine
diff --git a/test/functional/mempool_reorg.py b/test/functional/mempool_reorg.py
index 74a353ab01..c1de3d0d18 100755
--- a/test/functional/mempool_reorg.py
+++ b/test/functional/mempool_reorg.py
@@ -73,7 +73,7 @@ class MempoolCoinbaseTest(BitcoinTestFramework):
         # request very recent, unanounced transactions.
         assert_equal(len(peer1.get_invs()), 0)
         # It's too early to request these two transactions
-        requests_too_recent = msg_getdata([CInv(t=MSG_WTX, h=int(tx["tx"].getwtxid(), 16)) for tx in [tx_before_reorg, tx_child]])
+        requests_too_recent = msg_getdata([CInv(t=MSG_WTX, h=int(tx["tx"].wtxid_hex, 16)) for tx in [tx_before_reorg, tx_child]])
         peer1.send_and_ping(requests_too_recent)
         for _ in range(len(requests_too_recent.inv)):
             peer1.sync_with_ping()
@@ -82,7 +82,7 @@ class MempoolCoinbaseTest(BitcoinTestFramework):
             assert "notfound" in peer1.last_message
 
         # Request the tx from the disconnected block
-        request_disconnected_tx = msg_getdata([CInv(t=MSG_WTX, h=int(tx_disconnected["tx"].getwtxid(), 16))])
+        request_disconnected_tx = msg_getdata([CInv(t=MSG_WTX, h=int(tx_disconnected["tx"].wtxid_hex, 16))])
         peer1.send_and_ping(request_disconnected_tx)
 
         # The tx from the disconnected block was never announced, and it entered the mempool later
@@ -90,7 +90,7 @@ class MempoolCoinbaseTest(BitcoinTestFramework):
         assert_equal(len(peer1.get_invs()), 0)
         with p2p_lock:
             # However, the node will answer requests for the tx from the recently-disconnected block.
-            assert_equal(peer1.last_message["tx"].tx.getwtxid(),tx_disconnected["tx"].getwtxid())
+            assert_equal(peer1.last_message["tx"].tx.wtxid_hex,tx_disconnected["tx"].wtxid_hex)
 
         self.nodes[1].setmocktime(int(time.time()) + 300)
         peer1.sync_with_ping()
@@ -102,7 +102,7 @@ class MempoolCoinbaseTest(BitcoinTestFramework):
         last_tx_received = peer1.last_message["tx"]
 
         tx_after_reorg = self.wallet.send_self_transfer(from_node=self.nodes[1])
-        request_after_reorg = msg_getdata([CInv(t=MSG_WTX, h=int(tx_after_reorg["tx"].getwtxid(), 16))])
+        request_after_reorg = msg_getdata([CInv(t=MSG_WTX, h=int(tx_after_reorg["tx"].wtxid_hex, 16))])
         assert tx_after_reorg["txid"] in self.nodes[1].getrawmempool()
         peer1.send_and_ping(request_after_reorg)
         with p2p_lock:
diff --git a/test/functional/mempool_sigoplimit.py b/test/functional/mempool_sigoplimit.py
index ab58fed9e5..23ddf0bac9 100755
--- a/test/functional/mempool_sigoplimit.py
+++ b/test/functional/mempool_sigoplimit.py
@@ -168,7 +168,7 @@ class BytesPerSigOpTest(BitcoinTestFramework):
 
         # When we actually try to submit, the parent makes it into the mempool, but the child would exceed ancestor vsize limits
         res = self.nodes[0].submitpackage([tx_parent.serialize().hex(), tx_child.serialize().hex()])
-        assert "too-long-mempool-chain" in res["tx-results"][tx_child.getwtxid()]["error"]
+        assert "too-long-mempool-chain" in res["tx-results"][tx_child.wtxid_hex]["error"]
         assert tx_parent.txid_hex in self.nodes[0].getrawmempool()
 
         # Transactions are tiny in weight
diff --git a/test/functional/p2p_compactblocks.py b/test/functional/p2p_compactblocks.py
index dca1f1ce7b..7b816fe272 100755
--- a/test/functional/p2p_compactblocks.py
+++ b/test/functional/p2p_compactblocks.py
@@ -349,7 +349,7 @@ class CompactBlocksTest(BitcoinTestFramework):
             assert_equal(entry.tx.txid_hex, block.vtx[entry.index].txid_hex)
 
             # And this checks the witness
-            assert_equal(entry.tx.getwtxid(), block.vtx[entry.index].getwtxid())
+            assert_equal(entry.tx.wtxid_hex, block.vtx[entry.index].wtxid_hex)
 
         # Check that the cmpctblock message announced all the transactions.
         assert_equal(len(header_and_shortids.prefilled_txn) + len(header_and_shortids.shortids), len(block.vtx))
@@ -586,7 +586,7 @@ class CompactBlocksTest(BitcoinTestFramework):
                     tx = test_node.last_message["blocktxn"].block_transactions.transactions.pop(0)
                     assert_equal(tx.txid_hex, block.vtx[index].txid_hex)
                     # Check that the witness matches
-                    assert_equal(tx.getwtxid(), block.vtx[index].getwtxid())
+                    assert_equal(tx.wtxid_hex, block.vtx[index].wtxid_hex)
                 test_node.last_message.pop("blocktxn", None)
             current_height -= 1
 
diff --git a/test/functional/p2p_leak_tx.py b/test/functional/p2p_leak_tx.py
index a2eec49b72..a1a00751d1 100755
--- a/test/functional/p2p_leak_tx.py
+++ b/test/functional/p2p_leak_tx.py
@@ -44,7 +44,7 @@ class P2PLeakTxTest(BitcoinTestFramework):
         self.log.debug("Request transaction")
         inbound_peer.last_message.pop("tx", None)
         inbound_peer.send_and_ping(want_tx)
-        assert_equal(inbound_peer.last_message.get("tx").tx.getwtxid(), wtxid)
+        assert_equal(inbound_peer.last_message.get("tx").tx.wtxid_hex, wtxid)
 
     def test_notfound_on_replaced_tx(self):
         self.gen_node.disconnect_p2ps()
@@ -57,7 +57,7 @@ class P2PLeakTxTest(BitcoinTestFramework):
         tx_b = tx_a["tx"]
         tx_b.vout[0].nValue -= 9000
         self.gen_node.sendrawtransaction(tx_b.serialize().hex())
-        inbound_peer.wait_until(lambda: "tx" in inbound_peer.last_message and inbound_peer.last_message.get("tx").tx.getwtxid() == tx_b.getwtxid())
+        inbound_peer.wait_until(lambda: "tx" in inbound_peer.last_message and inbound_peer.last_message.get("tx").tx.wtxid_hex == tx_b.wtxid_hex)
 
         self.log.info("Re-request of tx_a after replacement is answered with notfound")
         req_vec = [
diff --git a/test/functional/p2p_opportunistic_1p1c.py b/test/functional/p2p_opportunistic_1p1c.py
index c7d3a2de96..49171de82f 100755
--- a/test/functional/p2p_opportunistic_1p1c.py
+++ b/test/functional/p2p_opportunistic_1p1c.py
@@ -83,7 +83,7 @@ class PackageRelayTest(BitcoinTestFramework):
         peer_sender = node.add_p2p_connection(P2PInterface())
 
         # 1. Child is received first (perhaps the low feerate parent didn't meet feefilter or the requests were sent to different nodes). It is missing an input.
-        high_child_wtxid_int = int(high_fee_child["tx"].getwtxid(), 16)
+        high_child_wtxid_int = int(high_fee_child["tx"].wtxid_hex, 16)
         peer_sender.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=high_child_wtxid_int)]))
         peer_sender.wait_for_getdata([high_child_wtxid_int])
         peer_sender.send_and_ping(msg_tx(high_fee_child["tx"]))
@@ -112,7 +112,7 @@ class PackageRelayTest(BitcoinTestFramework):
         peer_ignored = node.add_outbound_p2p_connection(P2PInterface(), p2p_idx=2, connection_type="outbound-full-relay")
 
         # 1. Parent is relayed first. It is too low feerate.
-        parent_wtxid_int = int(low_fee_parent["tx"].getwtxid(), 16)
+        parent_wtxid_int = int(low_fee_parent["tx"].wtxid_hex, 16)
         peer_sender.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=parent_wtxid_int)]))
         peer_sender.wait_for_getdata([parent_wtxid_int])
         peer_sender.send_and_ping(msg_tx(low_fee_parent["tx"]))
@@ -123,7 +123,7 @@ class PackageRelayTest(BitcoinTestFramework):
         assert "getdata" not in peer_ignored.last_message
 
         # 2. Child is relayed next. It is missing an input.
-        high_child_wtxid_int = int(high_fee_child["tx"].getwtxid(), 16)
+        high_child_wtxid_int = int(high_fee_child["tx"].wtxid_hex, 16)
         peer_sender.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=high_child_wtxid_int)]))
         peer_sender.wait_for_getdata([high_child_wtxid_int])
         peer_sender.send_and_ping(msg_tx(high_fee_child["tx"]))
@@ -156,7 +156,7 @@ class PackageRelayTest(BitcoinTestFramework):
         self.log.info("Check that tx caches low fee parent + low fee child package rejections")
 
         # 1. Send parent, rejected for being low feerate.
-        parent_wtxid_int = int(low_fee_parent["tx"].getwtxid(), 16)
+        parent_wtxid_int = int(low_fee_parent["tx"].wtxid_hex, 16)
         peer_sender.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=parent_wtxid_int)]))
         peer_sender.wait_for_getdata([parent_wtxid_int])
         peer_sender.send_and_ping(msg_tx(low_fee_parent["tx"]))
@@ -167,7 +167,7 @@ class PackageRelayTest(BitcoinTestFramework):
         assert "getdata" not in peer_ignored.last_message
 
         # 2. Send an (orphan) child that has a higher feerate, but not enough to bump the parent.
-        med_child_wtxid_int = int(med_fee_child["tx"].getwtxid(), 16)
+        med_child_wtxid_int = int(med_fee_child["tx"].wtxid_hex, 16)
         peer_sender.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=med_child_wtxid_int)]))
         peer_sender.wait_for_getdata([med_child_wtxid_int])
         peer_sender.send_and_ping(msg_tx(med_fee_child["tx"]))
@@ -193,7 +193,7 @@ class PackageRelayTest(BitcoinTestFramework):
         assert med_fee_child["txid"] not in node.getrawmempool()
 
         # 5. Send the high feerate (orphan) child
-        high_child_wtxid_int = int(high_fee_child["tx"].getwtxid(), 16)
+        high_child_wtxid_int = int(high_fee_child["tx"].wtxid_hex, 16)
         peer_sender.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=high_child_wtxid_int)]))
         peer_sender.wait_for_getdata([high_child_wtxid_int])
         peer_sender.send_and_ping(msg_tx(high_fee_child["tx"]))
@@ -229,7 +229,7 @@ class PackageRelayTest(BitcoinTestFramework):
         parent_sender = node.add_p2p_connection(P2PInterface())
 
         # 1. Child is received first. It is missing an input.
-        child_wtxid_int = int(tx_orphan_bad_wit.getwtxid(), 16)
+        child_wtxid_int = int(tx_orphan_bad_wit.wtxid_hex, 16)
         bad_orphan_sender.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=child_wtxid_int)]))
         bad_orphan_sender.wait_for_getdata([child_wtxid_int])
         bad_orphan_sender.send_and_ping(msg_tx(tx_orphan_bad_wit))
@@ -270,7 +270,7 @@ class PackageRelayTest(BitcoinTestFramework):
         fake_parent_sender = node.add_p2p_connection(P2PInterface())
 
         # 1. Child is received first. It is missing an input.
-        child_wtxid_int = int(high_fee_child["tx"].getwtxid(), 16)
+        child_wtxid_int = int(high_fee_child["tx"].wtxid_hex, 16)
         package_sender.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=child_wtxid_int)]))
         package_sender.wait_for_getdata([child_wtxid_int])
         package_sender.send_and_ping(msg_tx(high_fee_child["tx"]))
@@ -292,7 +292,7 @@ class PackageRelayTest(BitcoinTestFramework):
         self.log.info("Check that fake parent does not cause orphan to be deleted and real package can still be submitted")
         # 5. Child-sending should not have been punished and the orphan should remain in orphanage.
         # It can send the "real" parent transaction, and the package is accepted.
-        parent_wtxid_int = int(low_fee_parent["tx"].getwtxid(), 16)
+        parent_wtxid_int = int(low_fee_parent["tx"].wtxid_hex, 16)
         package_sender.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=parent_wtxid_int)]))
         package_sender.wait_for_getdata([parent_wtxid_int])
         package_sender.send_and_ping(msg_tx(low_fee_parent["tx"]))
diff --git a/test/functional/p2p_orphan_handling.py b/test/functional/p2p_orphan_handling.py
index 376770d28d..b0cb1331d3 100755
--- a/test/functional/p2p_orphan_handling.py
+++ b/test/functional/p2p_orphan_handling.py
@@ -128,11 +128,11 @@ class OrphanHandlingTest(BitcoinTestFramework):
         """Create package with 1 parent and 1 child, normal fees (no cpfp)."""
         parent = self.wallet.create_self_transfer()
         child = self.wallet.create_self_transfer(utxo_to_spend=parent['new_utxo'])
-        return child["tx"].getwtxid(), child["tx"], parent["tx"]
+        return child["tx"].wtxid_hex, child["tx"], parent["tx"]
 
     def relay_transaction(self, peer, tx):
         """Relay transaction using MSG_WTX"""
-        wtxid = int(tx.getwtxid(), 16)
+        wtxid = int(tx.wtxid_hex, 16)
         peer.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=wtxid)]))
         self.nodes[0].bumpmocktime(TXREQUEST_TIME_SKIP)
         peer.wait_for_getdata([wtxid])
@@ -150,7 +150,7 @@ class OrphanHandlingTest(BitcoinTestFramework):
         tx_bad_wit.wit.vtxinwit[0].scriptWitness.stack = [b'garbage']
 
         assert_equal(tx["txid"], tx_bad_wit.txid_hex)
-        assert_not_equal(tx["wtxid"], tx_bad_wit.getwtxid())
+        assert_not_equal(tx["wtxid"], tx_bad_wit.wtxid_hex)
 
         return tx_bad_wit
 
@@ -184,7 +184,7 @@ class OrphanHandlingTest(BitcoinTestFramework):
 
         # Spy peer should not be able to query the node for the parent yet, since it hasn't been
         # announced / insufficient time has elapsed.
-        parent_inv = CInv(t=MSG_WTX, h=int(tx_parent_arrives["tx"].getwtxid(), 16))
+        parent_inv = CInv(t=MSG_WTX, h=int(tx_parent_arrives["tx"].wtxid_hex, 16))
         assert_equal(len(peer_spy.get_invs()), 0)
         peer_spy.assert_no_immediate_response(msg_getdata([parent_inv]))
 
@@ -205,7 +205,7 @@ class OrphanHandlingTest(BitcoinTestFramework):
 
         self.log.info("Test orphan handling when a nonsegwit parent is known to be invalid")
         parent_low_fee_nonsegwit = self.wallet_nonsegwit.create_self_transfer(fee_rate=0)
-        assert_equal(parent_low_fee_nonsegwit["txid"], parent_low_fee_nonsegwit["tx"].getwtxid())
+        assert_equal(parent_low_fee_nonsegwit["txid"], parent_low_fee_nonsegwit["tx"].wtxid_hex)
         parent_other = self.wallet_nonsegwit.create_self_transfer()
         child_nonsegwit = self.wallet_nonsegwit.create_self_transfer_multi(
             utxos_to_spend=[parent_other["new_utxo"], parent_low_fee_nonsegwit["new_utxo"]])
@@ -348,9 +348,9 @@ class OrphanHandlingTest(BitcoinTestFramework):
         assert_equal(inflight_parent_AB["txid"], inflight_parent_AB["wtxid"])
 
         # Announce inflight_parent_AB and wait for getdata
-        peer_txrequest.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=int(inflight_parent_AB["tx"].getwtxid(), 16))]))
+        peer_txrequest.send_and_ping(msg_inv([CInv(t=MSG_WTX, h=int(inflight_parent_AB["tx"].wtxid_hex, 16))]))
         self.nodes[0].bumpmocktime(NONPREF_PEER_TX_DELAY)
-        peer_txrequest.wait_for_getdata([int(inflight_parent_AB["tx"].getwtxid(), 16)])
+        peer_txrequest.wait_for_getdata([int(inflight_parent_AB["tx"].wtxid_hex, 16)])
 
         self.log.info("Test that the node does not request a parent if it has an in-flight txrequest")
         # Relay orphan child_A
@@ -408,11 +408,11 @@ class OrphanHandlingTest(BitcoinTestFramework):
 
         self.log.info("Test that an orphan with rejected parents, along with any descendants, cannot be retried with an alternate witness")
         parent_low_fee_nonsegwit = self.wallet_nonsegwit.create_self_transfer(fee_rate=0)
-        assert_equal(parent_low_fee_nonsegwit["txid"], parent_low_fee_nonsegwit["tx"].getwtxid())
+        assert_equal(parent_low_fee_nonsegwit["txid"], parent_low_fee_nonsegwit["tx"].wtxid_hex)
         child = self.wallet.create_self_transfer(utxo_to_spend=parent_low_fee_nonsegwit["new_utxo"])
         grandchild = self.wallet.create_self_transfer(utxo_to_spend=child["new_utxo"])
-        assert_not_equal(child["txid"], child["tx"].getwtxid())
-        assert_not_equal(grandchild["txid"], grandchild["tx"].getwtxid())
+        assert_not_equal(child["txid"], child["tx"].wtxid_hex)
+        assert_not_equal(grandchild["txid"], grandchild["tx"].wtxid_hex)
 
         # Relay the parent. It should be rejected because it pays 0 fees.
         self.relay_transaction(peer1, parent_low_fee_nonsegwit["tx"])
@@ -430,7 +430,7 @@ class OrphanHandlingTest(BitcoinTestFramework):
         assert_equal(0, len(node.getrawmempool()))
         assert not tx_in_orphanage(node, grandchild["tx"])
         peer2.assert_never_requested(child["txid"])
-        peer2.assert_never_requested(child["tx"].getwtxid())
+        peer2.assert_never_requested(child["tx"].wtxid_hex)
 
         # The child should never be requested, even if announced again with potentially different witness.
         # Sync with ping to ensure orphans are reconsidered
diff --git a/test/functional/p2p_permissions.py b/test/functional/p2p_permissions.py
index 4a52d5bddf..543cd3194b 100755
--- a/test/functional/p2p_permissions.py
+++ b/test/functional/p2p_permissions.py
@@ -118,7 +118,7 @@ class P2PPermissionsTests(BitcoinTestFramework):
 
         self.log.debug("Check that node[1] will send the tx to node[0] even though it is already in the mempool")
         self.connect_nodes(1, 0)
-        with self.nodes[1].assert_debug_log(["Force relaying tx {} (wtxid={}) from peer=0".format(txid, tx.getwtxid())]):
+        with self.nodes[1].assert_debug_log(["Force relaying tx {} (wtxid={}) from peer=0".format(txid, tx.wtxid_hex)]):
             p2p_rebroadcast_wallet.send_txs_and_test([tx], self.nodes[1])
             self.wait_until(lambda: txid in self.nodes[0].getrawmempool())
 
@@ -134,14 +134,14 @@ class P2PPermissionsTests(BitcoinTestFramework):
             [tx],
             self.nodes[1],
             success=False,
-            reject_reason='{} (wtxid={}) from peer=0 was not accepted: dust'.format(txid, tx.getwtxid())
+            reject_reason='{} (wtxid={}) from peer=0 was not accepted: dust'.format(txid, tx.wtxid_hex)
         )
 
         p2p_rebroadcast_wallet.send_txs_and_test(
             [tx],
             self.nodes[1],
             success=False,
-            reject_reason='Not relaying non-mempool transaction {} (wtxid={}) from forcerelay peer=0'.format(txid, tx.getwtxid())
+            reject_reason='Not relaying non-mempool transaction {} (wtxid={}) from forcerelay peer=0'.format(txid, tx.wtxid_hex)
         )
 
     def checkpermission(self, args, expectedPermissions):
diff --git a/test/functional/p2p_segwit.py b/test/functional/p2p_segwit.py
index 799e31f961..0892d9d1a4 100755
--- a/test/functional/p2p_segwit.py
+++ b/test/functional/p2p_segwit.py
@@ -336,7 +336,7 @@ class SegWitTest(BitcoinTestFramework):
 
         # Verify the hash with witness differs from the txid
         # (otherwise our testing framework must be broken!)
-        assert_not_equal(tx.txid_hex, tx.getwtxid())
+        assert_not_equal(tx.txid_hex, tx.wtxid_hex)
 
         # Construct a block that includes the transaction.
         block = self.build_next_block()
@@ -615,7 +615,7 @@ class SegWitTest(BitcoinTestFramework):
             assert_equal(testres3,
                 [{
                     'txid': tx3.txid_hex,
-                    'wtxid': tx3.getwtxid(),
+                    'wtxid': tx3.wtxid_hex,
                     'allowed': True,
                     'vsize': tx3.get_vsize(),
                     'fees': {
@@ -633,7 +633,7 @@ class SegWitTest(BitcoinTestFramework):
             assert_equal(testres3_replaced,
                 [{
                     'txid': tx3.txid_hex,
-                    'wtxid': tx3.getwtxid(),
+                    'wtxid': tx3.wtxid_hex,
                     'allowed': True,
                     'vsize': tx3.get_vsize(),
                     'fees': {
@@ -1258,7 +1258,7 @@ class SegWitTest(BitcoinTestFramework):
         # Test that getrawtransaction returns correct witness information
         # hash, size, vsize
         raw_tx = self.nodes[0].getrawtransaction(tx3.txid_hex, 1)
-        assert_equal(raw_tx["hash"], tx3.getwtxid())
+        assert_equal(raw_tx["hash"], tx3.wtxid_hex)
         assert_equal(raw_tx["size"], len(tx3.serialize_with_witness()))
         vsize = tx3.get_vsize()
         assert_equal(raw_tx["vsize"], vsize)
diff --git a/test/functional/rpc_packages.py b/test/functional/rpc_packages.py
index 6337117ff5..3947053c41 100755
--- a/test/functional/rpc_packages.py
+++ b/test/functional/rpc_packages.py
@@ -106,7 +106,7 @@ class RPCPackagesTest(BitcoinTestFramework):
         # Package validation is atomic: if the node cannot find a UTXO for any single tx in the package,
         # it terminates immediately to avoid unnecessary, expensive signature verification.
         package_bad = self.independent_txns_hex + [garbage_tx]
-        testres_bad = self.independent_txns_testres_blank + [{"txid": tx.txid_hex, "wtxid": tx.getwtxid(), "allowed": False, "reject-reason": "missing-inputs"}]
+        testres_bad = self.independent_txns_testres_blank + [{"txid": tx.txid_hex, "wtxid": tx.wtxid_hex, "allowed": False, "reject-reason": "missing-inputs"}]
         self.assert_testres_equal(package_bad, testres_bad)
 
         self.log.info("Check testmempoolaccept tells us when some transactions completed validation successfully")
@@ -118,7 +118,7 @@ class RPCPackagesTest(BitcoinTestFramework):
         # have been fully validated, which is why the node returns full validation results for all
         # transactions here but empty results in other cases.
         tx_bad_sig_txid = tx_bad_sig.txid_hex
-        tx_bad_sig_wtxid = tx_bad_sig.getwtxid()
+        tx_bad_sig_wtxid = tx_bad_sig.wtxid_hex
         assert_equal(testres_bad_sig, self.independent_txns_testres + [{
             "txid": tx_bad_sig_txid,
             "wtxid": tx_bad_sig_wtxid, "allowed": False,
@@ -146,7 +146,7 @@ class RPCPackagesTest(BitcoinTestFramework):
 
         self.log.info("Check that testmempoolaccept requires packages to be sorted by dependency")
         assert_equal(node.testmempoolaccept(rawtxs=chain_hex[::-1]),
-                [{"txid": tx.txid_hex, "wtxid": tx.getwtxid(), "package-error": "package-not-sorted"} for tx in chain_txns[::-1]])
+                [{"txid": tx.txid_hex, "wtxid": tx.wtxid_hex, "package-error": "package-not-sorted"} for tx in chain_txns[::-1]])
 
         self.log.info("Testmempoolaccept a chain of 25 transactions")
         testres_multiple = node.testmempoolaccept(rawtxs=chain_hex)
@@ -353,8 +353,8 @@ class RPCPackagesTest(BitcoinTestFramework):
         assert_equal(submitpackage_result["package_msg"], "success")
         for package_txn in package_txns:
             tx = package_txn["tx"]
-            assert tx.getwtxid() in submitpackage_result["tx-results"]
-            wtxid = tx.getwtxid()
+            assert tx.wtxid_hex in submitpackage_result["tx-results"]
+            wtxid = tx.wtxid_hex
             assert wtxid in submitpackage_result["tx-results"]
             tx_result = submitpackage_result["tx-results"][wtxid]
             assert_equal(tx_result["txid"], tx.txid_hex)
@@ -368,7 +368,7 @@ class RPCPackagesTest(BitcoinTestFramework):
         self.assert_equal_package_results(node, testmempoolaccept_result, submitpackage_result)
 
         # The node should announce each transaction. No guarantees for propagation.
-        peer.wait_for_broadcast([tx["tx"].getwtxid() for tx in package_txns])
+        peer.wait_for_broadcast([tx["tx"].wtxid_hex for tx in package_txns])
         self.generate(node, 1)
 
     def test_submitpackage(self):
@@ -410,9 +410,9 @@ class RPCPackagesTest(BitcoinTestFramework):
         hex_partial_acceptance = [txs[0]["hex"], bad_child.serialize().hex()]
         res = node.submitpackage(hex_partial_acceptance)
         assert_equal(res["package_msg"], "transaction failed")
-        first_wtxid = txs[0]["tx"].getwtxid()
+        first_wtxid = txs[0]["tx"].wtxid_hex
         assert "error" not in res["tx-results"][first_wtxid]
-        sec_wtxid = bad_child.getwtxid()
+        sec_wtxid = bad_child.wtxid_hex
         assert_equal(res["tx-results"][sec_wtxid]["error"], "version")
         peer.wait_for_broadcast([first_wtxid])
 
@@ -496,7 +496,7 @@ class RPCPackagesTest(BitcoinTestFramework):
         # Relax the restrictions for both and send it; parent gets through as own subpackage
         pkg_result = node.submitpackage(chained_burn_hex, maxfeerate=minrate_btc_kvb_burn, maxburnamount=chained_txns_burn[1]["new_utxo"]["value"])
         assert "error" not in pkg_result["tx-results"][chained_txns_burn[0]["wtxid"]]
-        assert_equal(pkg_result["tx-results"][tx.getwtxid()]["error"], "scriptpubkey")
+        assert_equal(pkg_result["tx-results"][tx.wtxid_hex]["error"], "scriptpubkey")
         assert_equal(node.getrawmempool(), [chained_txns_burn[0]["txid"]])
 
 if __name__ == "__main__":
diff --git a/test/functional/test_framework/mempool_util.py b/test/functional/test_framework/mempool_util.py
index bacd987a54..1955b2637e 100644
--- a/test/functional/test_framework/mempool_util.py
+++ b/test/functional/test_framework/mempool_util.py
@@ -104,5 +104,5 @@ def fill_mempool(test_framework, node, *, tx_sync_fun=None):
 
 def tx_in_orphanage(node, tx: CTransaction) -> bool:
     """Returns true if the transaction is in the orphanage."""
-    found = [o for o in node.getorphantxs(verbosity=1) if o["txid"] == tx.txid_hex and o["wtxid"] == tx.getwtxid()]
+    found = [o for o in node.getorphantxs(verbosity=1) if o["txid"] == tx.txid_hex and o["wtxid"] == tx.wtxid_hex]
     return len(found) == 1
diff --git a/test/functional/test_framework/messages.py b/test/functional/test_framework/messages.py
index 2b4e3bc596..b107fa1574 100755
--- a/test/functional/test_framework/messages.py
+++ b/test/functional/test_framework/messages.py
@@ -657,7 +657,8 @@ class CTransaction:
     def serialize(self):
         return self.serialize_with_witness()
 
-    def getwtxid(self):
+    @property
+    def wtxid_hex(self):
         """Return wtxid (transaction hash with witness) as hex string."""
         return hash256(self.serialize())[::-1].hex()
 
diff --git a/test/functional/test_framework/wallet.py b/test/functional/test_framework/wallet.py
index 98c691d96a..ab462f79a2 100644
--- a/test/functional/test_framework/wallet.py
+++ b/test/functional/test_framework/wallet.py
@@ -287,7 +287,7 @@ class MiniWallet:
         return {
             "sent_vout": 1,
             "txid": txid,
-            "wtxid": tx.getwtxid(),
+            "wtxid": tx.wtxid_hex,
             "hex": tx.serialize().hex(),
             "tx": tx,
         }
@@ -352,7 +352,7 @@ class MiniWallet:
             ) for i in range(len(tx.vout))],
             "fee": fee,
             "txid": txid,
-            "wtxid": tx.getwtxid(),
+            "wtxid": tx.wtxid_hex,
             "hex": tx.serialize().hex(),
             "tx": tx,
         }