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v29.4-roots.4 · Commit 35: [PATCH 35/37] rpc: report the configured RBF policy in getmempoolinfo

test/functional/mempool_rbf_policy.py

Before: /dev/null · After: test/functional/mempool_rbf_policy.py

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test/functional/mempool_rbf_policy.py ADDED
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+ #!/usr/bin/env python3
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+ # Copyright (c) 2026 The Bitcoin Roots developers
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+ # Distributed under the MIT software license, see the accompanying
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+ # file COPYING or http://www.opensource.org/licenses/mit-license.php.
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+ """Test that getmempoolinfo reports the configured replacement policy.
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+
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+ -mempoolreplacement and -mempoolfullrbf select whether conflicting
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+ transactions are never replaced, replaced only when the original signals
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+ BIP125 replaceability, or always replaced by fee. The "fullrbf" field must
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+ match the policy the node enforces.
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+ """
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+
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+ from decimal import Decimal
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+
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+ from test_framework.messages import (
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+ MAX_BIP125_RBF_SEQUENCE,
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+ SEQUENCE_FINAL,
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+ )
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+ from test_framework.test_framework import BitcoinTestFramework
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+ from test_framework.util import (
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+ assert_equal,
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+ assert_raises_rpc_error,
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+ )
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+ from test_framework.wallet import MiniWallet
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+
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+ # (extra_args, fullrbf, non-signaling original replaceable, signaling original replaceable)
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+ POLICIES = [
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+ ([], True, True, True),
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+ (["-mempoolreplacement=fee,-optin"], True, True, True),
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+ (["-mempoolreplacement=fee,optin"], False, False, True),
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+ (["-mempoolfullrbf=0"], False, False, True),
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+ (["-mempoolreplacement=0"], False, False, False),
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+ ]
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+
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+
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+ class MempoolRBFPolicyTest(BitcoinTestFramework):
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+ def set_test_params(self):
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+ self.num_nodes = 1
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+
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+ def run_test(self):
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+ self.wallet = MiniWallet(self.nodes[0])
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+
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+ for extra_args, fullrbf, nonsignaling_replaceable, signaling_replaceable in POLICIES:
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+ self.log.info(f"Check replacement policy with {extra_args or 'default options'}")
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+ self.restart_node(0, extra_args=extra_args)
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+ assert_equal(self.nodes[0].getmempoolinfo()["fullrbf"], fullrbf)
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+ self.check_replacement(sequence=SEQUENCE_FINAL, replaceable=nonsignaling_replaceable)
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+ self.check_replacement(sequence=MAX_BIP125_RBF_SEQUENCE, replaceable=signaling_replaceable)
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+ self.generate(self.nodes[0], 1)
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+
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+ def check_replacement(self, *, sequence, replaceable):
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+ node = self.nodes[0]
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+ utxo = self.wallet.get_utxo()
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+ original = self.wallet.create_self_transfer(utxo_to_spend=utxo, sequence=sequence)
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+ replacement = self.wallet.create_self_transfer(utxo_to_spend=utxo, sequence=sequence, fee_rate=Decimal("0.01"))
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+ node.sendrawtransaction(original["hex"])
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+ if replaceable:
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+ node.sendrawtransaction(replacement["hex"])
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+ mempool = node.getrawmempool()
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+ assert original["txid"] not in mempool
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+ assert replacement["txid"] in mempool
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+ else:
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+ assert_raises_rpc_error(-26, "txn-mempool-conflict", node.sendrawtransaction, replacement["hex"])
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+ assert original["txid"] in node.getrawmempool()
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+
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+
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+ if __name__ == '__main__':
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+ MempoolRBFPolicyTest(__file__).main()