qa: functional test Miniscript signing with key and timelocks

We'll need a better integration of the hash preimages PSBT fields to
satisfy Miniscript with such challenges from the RPC.

Thanks to Greg Sanders for his examples and suggestions to improve this
test.
This commit is contained in:
Antoine Poinsot 2022-01-20 16:36:16 +01:00
parent d57b7f2021
commit 611e12502a
No known key found for this signature in database
GPG Key ID: E13FC145CD3F4304

View File

@ -40,7 +40,90 @@ MINISCRIPTS = [
# A Revault Unvault policy with the older() replaced by an after()
f"andor(multi(2,{TPUBS[0]}/*,{TPUBS[1]}/*),and_v(v:multi(4,{PUBKEYS[0]},{PUBKEYS[1]},{PUBKEYS[2]},{PUBKEYS[3]}),after(424242)),thresh(4,pkh({TPUBS[2]}/*),a:pkh({TPUBS[3]}/*),a:pkh({TPUBS[4]}/*),a:pkh({TPUBS[5]}/*)))",
# Liquid-like federated pegin with emergency recovery keys
"or_i(and_b(pk(029ffbe722b147f3035c87cb1c60b9a5947dd49c774cc31e94773478711a929ac0),a:and_b(pk(025f05815e3a1a8a83bfbb03ce016c9a2ee31066b98f567f6227df1d76ec4bd143),a:and_b(pk(025625f41e4a065efc06d5019cbbd56fe8c07595af1231e7cbc03fafb87ebb71ec),a:and_b(pk(02a27c8b850a00f67da3499b60562673dcf5fdfb82b7e17652a7ac54416812aefd),s:pk(03e618ec5f384d6e19ca9ebdb8e2119e5bef978285076828ce054e55c4daf473e2))))),and_v(v:thresh(2,pkh(tpubD6NzVbkrYhZ4YK67cd5fDe4fBVmGB2waTDrAt1q4ey9HPq9veHjWkw3VpbaCHCcWozjkhgAkWpFrxuPMUrmXVrLHMfEJ9auoZA6AS1g3grC/*),a:pkh(033841045a531e1adf9910a6ec279589a90b3b8a904ee64ffd692bd08a8996c1aa),a:pkh(02aebf2d10b040eb936a6f02f44ee82f8b34f5c1ccb20ff3949c2b28206b7c1068)),older(4209713)))",
f"or_i(and_b(pk({PUBKEYS[0]}),a:and_b(pk({PUBKEYS[1]}),a:and_b(pk({PUBKEYS[2]}),a:and_b(pk({PUBKEYS[3]}),s:pk({PUBKEYS[4]}))))),and_v(v:thresh(2,pkh({TPUBS[0]}/*),a:pkh({PUBKEYS[5]}),a:pkh({PUBKEYS[6]})),older(4209713)))",
]
MINISCRIPTS_PRIV = [
# One of two keys, of which one private key is known
{
"ms": f"or_i(pk({TPRVS[0]}/*),pk({TPUBS[0]}/*))",
"sequence": None,
"locktime": None,
"sigs_count": 1,
"stack_size": 3,
},
# A more complex policy, that can't be satisfied through the first branch (need for a preimage)
{
"ms": f"andor(ndv:older(2),and_v(v:pk({TPRVS[0]}),sha256(2a8ce30189b2ec3200b47aeb4feaac8fcad7c0ba170389729f4898b0b7933bcb)),and_v(v:pkh({TPRVS[1]}),pk({TPRVS[2]}/*)))",
"sequence": 2,
"locktime": None,
"sigs_count": 3,
"stack_size": 5,
},
# Signature with a relative timelock
{
"ms": f"and_v(v:older(2),pk({TPRVS[0]}/*))",
"sequence": 2,
"locktime": None,
"sigs_count": 1,
"stack_size": 2,
},
# Signature with an absolute timelock
{
"ms": f"and_v(v:after(20),pk({TPRVS[0]}/*))",
"sequence": None,
"locktime": 20,
"sigs_count": 1,
"stack_size": 2,
},
# Signature with both
{
"ms": f"and_v(v:older(4),and_v(v:after(30),pk({TPRVS[0]}/*)))",
"sequence": 4,
"locktime": 30,
"sigs_count": 1,
"stack_size": 2,
},
# We have one key on each branch; Core signs both (can't finalize)
{
"ms": f"c:andor(pk({TPRVS[0]}/*),pk_k({TPUBS[0]}),and_v(v:pk({TPRVS[1]}),pk_k({TPUBS[1]})))",
"sequence": None,
"locktime": None,
"sigs_count": 2,
"stack_size": None,
},
# We have all the keys, wallet selects the timeout path to sign since it's smaller and sequence is set
{
"ms": f"andor(pk({TPRVS[0]}/*),pk({TPRVS[2]}),and_v(v:pk({TPRVS[1]}),older(10)))",
"sequence": 10,
"locktime": None,
"sigs_count": 3,
"stack_size": 3,
},
# We have all the keys, wallet selects the primary path to sign unconditionally since nsequence wasn't set to be valid for timeout path
{
"ms": f"andor(pk({TPRVS[0]}/*),pk({TPRVS[2]}),and_v(v:pkh({TPRVS[1]}),older(10)))",
"sequence": None,
"locktime": None,
"sigs_count": 3,
"stack_size": 3,
},
# Finalizes to the smallest valid witness, regardless of sequence
{
"ms": f"or_d(pk({TPRVS[0]}/*),and_v(v:pk({TPRVS[1]}),and_v(v:pk({TPRVS[2]}),older(10))))",
"sequence": 12,
"locktime": None,
"sigs_count": 3,
"stack_size": 2,
},
# Liquid-like federated pegin with emergency recovery privkeys
{
"ms": f"or_i(and_b(pk({TPUBS[0]}/*),a:and_b(pk({TPUBS[1]}),a:and_b(pk({TPUBS[2]}),a:and_b(pk({TPUBS[3]}),s:pk({PUBKEYS[0]}))))),and_v(v:thresh(2,pkh({TPRVS[0]}),a:pkh({TPRVS[1]}),a:pkh({TPUBS[4]})),older(42)))",
"sequence": 42,
"locktime": None,
"sigs_count": 2,
"stack_size": 8,
},
]
@ -84,6 +167,68 @@ class WalletMiniscriptTest(BitcoinTestFramework):
utxo = self.ms_wo_wallet.listunspent(minconf=0, addresses=[addr])[0]
assert utxo["txid"] == txid and utxo["solvable"]
def signing_test(self, ms, sequence, locktime, sigs_count, stack_size):
self.log.info(f"Importing private Miniscript '{ms}'")
desc = descsum_create(f"wsh({ms})")
res = self.ms_sig_wallet.importdescriptors(
[
{
"desc": desc,
"active": True,
"range": 0,
"next_index": 0,
"timestamp": "now",
}
]
)
assert res[0]["success"], res
self.log.info("Generating an address for it and testing it detects funds")
addr = self.ms_sig_wallet.getnewaddress()
txid = self.funder.sendtoaddress(addr, 0.01)
self.wait_until(lambda: txid in self.funder.getrawmempool())
self.funder.generatetoaddress(1, self.funder.getnewaddress())
utxo = self.ms_sig_wallet.listunspent(addresses=[addr])[0]
assert txid == utxo["txid"] and utxo["solvable"]
self.log.info("Creating a transaction spending these funds")
dest_addr = self.funder.getnewaddress()
seq = sequence if sequence is not None else 0xFFFFFFFF - 2
lt = locktime if locktime is not None else 0
psbt = self.ms_sig_wallet.createpsbt(
[
{
"txid": txid,
"vout": utxo["vout"],
"sequence": seq,
}
],
[{dest_addr: 0.009}],
lt,
)
self.log.info("Signing it and checking the satisfaction.")
res = self.ms_sig_wallet.walletprocesspsbt(psbt=psbt, finalize=False)
psbtin = self.nodes[0].rpc.decodepsbt(res["psbt"])["inputs"][0]
assert len(psbtin["partial_signatures"]) == sigs_count
res = self.ms_sig_wallet.finalizepsbt(res["psbt"])
assert res["complete"] == (stack_size is not None)
if stack_size is not None:
txin = self.nodes[0].rpc.decoderawtransaction(res["hex"])["vin"][0]
assert len(txin["txinwitness"]) == stack_size, txin["txinwitness"]
self.log.info("Broadcasting the transaction.")
# If necessary, satisfy a relative timelock
if sequence is not None:
self.funder.generatetoaddress(sequence, self.funder.getnewaddress())
# If necessary, satisfy an absolute timelock
height = self.funder.getblockcount()
if locktime is not None and height < locktime:
self.funder.generatetoaddress(
locktime - height, self.funder.getnewaddress()
)
self.ms_sig_wallet.sendrawtransaction(res["hex"])
def run_test(self):
self.log.info("Making a descriptor wallet")
self.funder = self.nodes[0].get_wallet_rpc(self.default_wallet_name)
@ -91,6 +236,8 @@ class WalletMiniscriptTest(BitcoinTestFramework):
wallet_name="ms_wo", descriptors=True, disable_private_keys=True
)
self.ms_wo_wallet = self.nodes[0].get_wallet_rpc("ms_wo")
self.nodes[0].createwallet(wallet_name="ms_sig", descriptors=True)
self.ms_sig_wallet = self.nodes[0].get_wallet_rpc("ms_sig")
# Sanity check we wouldn't let an insane Miniscript descriptor in
res = self.ms_wo_wallet.importdescriptors(
@ -111,6 +258,16 @@ class WalletMiniscriptTest(BitcoinTestFramework):
for ms in MINISCRIPTS:
self.watchonly_test(ms)
# Test we can sign most Miniscript (all but ones requiring preimages, for now)
for ms in MINISCRIPTS_PRIV:
self.signing_test(
ms["ms"],
ms["sequence"],
ms["locktime"],
ms["sigs_count"],
ms["stack_size"],
)
if __name__ == "__main__":
WalletMiniscriptTest().main()