v31.1-roots.1 · Commit 2: [PATCH 02/17] feat(policy): preserve Roots parsing and local transaction checks
test/functional/mempool_roots_local_policy.py
Before: /dev/null · After: test/functional/mempool_roots_local_policy.py
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test/functional/mempool_roots_local_policy.py
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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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"""Local Roots controls, exact relay-age boundaries and block validity."""
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from test_framework.messages import CTxOut
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from test_framework.script import CScript, OP_2, OP_13, OP_RETURN
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from test_framework.script_util import key_to_p2pk_script
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal
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from test_framework.wallet import MiniWallet
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from test_framework.wallet_util import generate_keypair
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class LocalPolicyTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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self.wallet_names = []
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def run_test(self):
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node = self.nodes[0]
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wallet = MiniWallet(node)
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def result(tx):
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return node.testmempoolaccept([tx.serialize().hex()])[0]
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def rejected(tx, reason):
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res = result(tx)
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assert_equal(res["allowed"], False)
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assert_equal(res["reject-reason"], reason)
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tx = wallet.create_self_transfer()["tx"]
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tx.nLockTime = 21
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rejected(tx, "parasite-cat21")
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self.restart_node(0, extra_args=["-acceptnonstdtxn=1"])
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assert_equal(result(tx)["allowed"], True)
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self.restart_node(0, extra_args=["-rejectparasites=0"])
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assert_equal(result(tx)["allowed"], True)
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self.restart_node(0)
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# The default local marker restriction must never affect block validity.
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self.generateblock(node, output="raw(42)", transactions=[tx.serialize().hex()])
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tx = wallet.create_self_transfer()["tx"]
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tx.vout[0].scriptPubKey = key_to_p2pk_script(generate_keypair()[1])
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rejected(tx, "bare-pubkey")
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self.restart_node(0, extra_args=["-permitbarepubkey=1"])
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assert_equal(result(tx)["allowed"], True)
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self.restart_node(0)
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rejected(tx, "bare-pubkey")
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self.generateblock(node, output="raw(42)", transactions=[tx.serialize().hex()])
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tx = wallet.create_self_transfer()["tx"]
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tx.vout[0].scriptPubKey = CScript([OP_2, b"w" * 32])
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assert_equal(result(tx)["allowed"], True)
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self.restart_node(0, extra_args=["-acceptunknownwitness=0"])
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rejected(tx, "scriptpubkey-unknown-witnessversion")
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self.generateblock(node, output="raw(42)", transactions=[tx.serialize().hex()])
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self.restart_node(0)
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tx = wallet.create_self_transfer()["tx"]
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tx.vout.append(CTxOut(0, CScript([OP_RETURN, OP_13, b"token"])))
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self.restart_node(0, extra_args=["-rejecttokens=1"])
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rejected(tx, "tokens-runes")
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self.restart_node(0)
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assert_equal(result(tx)["allowed"], True)
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self.restart_node(0, extra_args=["-rejecttokens=1"])
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self.generateblock(node, output="raw(42)", transactions=[tx.serialize().hex()])
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self.restart_node(0)
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tx = wallet.create_self_transfer()["tx"]
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tx.vout.extend([CTxOut(0, CScript([OP_RETURN])), CTxOut(0, CScript([OP_RETURN]))])
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rejected(tx, "multi-op-return")
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self.generateblock(node, output="raw(42)", transactions=[tx.serialize().hex()])
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self.log.info("Ephemeral send/dust flags preserve their local exceptions")
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tx = wallet.create_self_transfer(fee_rate=0)["tx"]
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tx.vout.append(CTxOut(1, tx.vout[0].scriptPubKey))
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tx.vout[0].nValue -= 1
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rejected(tx, "dust-nonanchor")
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# These local exceptions are independent of L8's deferred deficit penalty.
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self.restart_node(0, extra_args=["-permitephemeral=send", "-minrelaytxfee=0"])
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assert_equal(result(tx)["allowed"], True)
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self.restart_node(0, extra_args=["-permitephemeral=send,-dust", "-minrelaytxfee=0"])
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rejected(tx, "dust-nonzero")
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self.generateblock(node, output="raw(42)", transactions=[tx.serialize().hex()])
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self.restart_node(0)
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self.log.info("Relay maturity and coin-block gates are independent of block maturity")
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parent = wallet.send_self_transfer(from_node=node)
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child = wallet.create_self_transfer(utxo_to_spend=parent["new_utxo"])
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self.restart_node(0, extra_args=["-minrelaymaturity=1"])
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rejected(child["tx"], "bad-txns-input-immature-depth")
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self.restart_node(0, extra_args=["-minrelaycoinblocks=1"])
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rejected(child["tx"], "bad-txns-input-immature-coinblocks")
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self.restart_node(0, extra_args=["-minrelaycoinblocks=0", "-minrelaymaturity=0"])
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assert_equal(result(child["tx"])["allowed"], True)
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self.generate(node, 1)
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value = parent["tx"].vout[0].nValue
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self.restart_node(0, extra_args=[f"-minrelaycoinblocks={value}", "-minrelaymaturity=1"])
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assert_equal(result(child["tx"])["allowed"], True)
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self.restart_node(0, extra_args=[f"-minrelaycoinblocks={value + 1}"])
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rejected(child["tx"], "bad-txns-input-immature-coinblocks")
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self.restart_node(0, extra_args=["-minrelaymaturity=2"])
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rejected(child["tx"], "bad-txns-input-immature-depth")
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self.generate(node, 1)
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assert_equal(result(child["tx"])["allowed"], True)
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# Tip changes must affect fresh local admission, without a stale age cache.
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last_block = node.getbestblockhash()
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node.invalidateblock(last_block)
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rejected(child["tx"], "bad-txns-input-immature-depth")
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node.reconsiderblock(last_block)
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assert_equal(result(child["tx"])["allowed"], True)
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self.restart_node(0, extra_args=["-minrelaycoinblocks=9223372036854775807"])
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rejected(child["tx"], "bad-txns-input-immature-coinblocks")
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self.restart_node(0, extra_args=["-minrelaymaturity=2147483647", "-minrelaycoinblocks=9223372036854775807"])
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rejected(child["tx"], "bad-txns-input-immature-depth")
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self.generateblock(node, output="raw(42)", transactions=[child["hex"]])
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if __name__ == '__main__':
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LocalPolicyTest(__file__).main()
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