def replace_derivations(self, wallet, psbts):
# cc wants everyone to use the same derivation
fgp = None
derivation = None
for k in wallet.keys:
if k in self.keys and k.fingerprint and k.derivation:
fgp = k.fingerprint
derivation = k.derivation
break
if not fgp:
return
path = bip32.parse_path(derivation)
for kk in list(psbts.keys()):
psbt = PSBT.parse(a2b_base64(psbts[kk]))
for xpub in psbt.xpubs:
psbt.xpubs[xpub].derivation = list(path)
# remove partial signatures from device psbt
for scope in psbt.inputs:
scope.partial_sigs = OrderedDict()
for scope in psbt.inputs + psbt.outputs:
for k in list(scope.bip32_derivations.keys()):
original = scope.bip32_derivations[k].derivation
scope.bip32_derivations[
k].derivation = path + original[-2:]
psbts[kk] = b2a_base64(psbt.serialize()).decode().strip()
def create_psbts(self, base64_psbt, wallet):
psbts = super().create_psbts(base64_psbt, wallet)
# remove non-witness utxo if they are there to reduce QR code size
updated_psbt = wallet.fill_psbt(base64_psbt,
non_witness=False,
xpubs=False)
qr_psbt = PSBT.parse(a2b_base64(updated_psbt))
# find my key
fgp = None
derivation = None
for k in wallet.keys:
if k in self.keys and k.fingerprint and k.derivation:
fgp = bytes.fromhex(k.fingerprint)
derivation = bip32.parse_path(k.derivation)
break
# remove unnecessary derivations from inputs and outputs
for inp in qr_psbt.inputs + qr_psbt.outputs:
# keep only my derivation
for k in list(inp.bip32_derivations.keys()):
if inp.bip32_derivations[k].fingerprint != fgp:
inp.bip32_derivations.pop(k, None)
# remove scripts from outputs (DIY should know about the wallet)
for out in qr_psbt.outputs:
out.witness_script = None
out.redeem_script = None
# remove partial sigs from inputs
for inp in qr_psbt.inputs:
inp.partial_sigs = {}
psbts["qrcode"] = b2a_base64(qr_psbt.serialize()).strip().decode()
# we can add xpubs to SD card, but non_witness can be too large for MCU
psbts["sdcard"] = wallet.fill_psbt(psbts["qrcode"],
non_witness=False,
xpubs=True)
return psbts
def create_psbts(self, base64_psbt, wallet):
try:
# remove rangeproofs and add sighash alls
psbt = PSET.from_string(base64_psbt)
for out in psbt.outputs:
out.range_proof = None
out.surjection_proof = None
for inp in psbt.inputs:
if not inp.sighash_type:
inp.sighash_type = LSIGHASH.ALL
base64_psbt = psbt.to_string()
except:
pass
psbts = super().create_psbts(base64_psbt, wallet)
# remove non-witness utxo if they are there to reduce QR code size
updated_psbt = wallet.fill_psbt(base64_psbt, non_witness=False, xpubs=False)
try:
qr_psbt = PSBT.from_string(updated_psbt)
except:
qr_psbt = PSET.from_string(updated_psbt)
# find my key
fgp = None
derivation = None
for k in wallet.keys:
if k in self.keys and k.fingerprint and k.derivation:
fgp = bytes.fromhex(k.fingerprint)
derivation = bip32.parse_path(k.derivation)
break
# remove unnecessary derivations from inputs and outputs
for inp in qr_psbt.inputs + qr_psbt.outputs:
# keep only my derivation
for k in list(inp.bip32_derivations.keys()):
if fgp and inp.bip32_derivations[k].fingerprint != fgp:
inp.bip32_derivations.pop(k, None)
# remove scripts from outputs (DIY should know about the wallet)
for out in qr_psbt.outputs:
out.witness_script = None
out.redeem_script = None
# remove partial sigs from inputs
for inp in qr_psbt.inputs:
inp.partial_sigs = {}
psbts["qrcode"] = qr_psbt.to_string()
# we can add xpubs to SD card, but non_witness can be too large for MCU
psbts["sdcard"] = wallet.fill_psbt(base64_psbt, non_witness=False, xpubs=True)
return psbts
def fill_external_wallet_derivations(psbt, wallet):
# fill derivations for receiving wallets if they own address
net = get_network(wallet.manager.chain)
wallets = wallet.manager.wallets.values()
for out in psbt.outputs:
try: # if we fail - not a big deal
# check if output derivation is empty
if out.bip32_derivations:
continue
try:
# if there is no address representation - continue
addr = out.script_pubkey.address(net)
except:
continue
for w in wallets:
# skip sending wallet
if w == wallet:
continue
if not w.is_address_mine(addr):
continue
# we get here if wallet owns address
info = w.get_address_info(addr)
derivation = [int(info.change), int(info.index)]
# we first one key and build derivation for it
# it's enough for DIY to do the res
k = w.keys[0]
key = bip32.HDKey.from_string(k.xpub)
if k.fingerprint != "":
fingerprint = bytes.fromhex(k.fingerprint)
else:
fingerprint = key.my_fingerprint
if k.derivation != "":
der = bip32.parse_path(k.derivation)
else:
der = []
pub = key.derive(derivation).key
out.bip32_derivations[pub] = DerivationPath(
fingerprint, der + derivation)
break
except Exception as e:
logger.exception(e)
def extract_xpub(
self,
derivation=None,
device_type=None,
path=None,
fingerprint=None,
passphrase="",
chain="",
):
with self._get_client(
device_type=device_type,
fingerprint=fingerprint,
path=path,
passphrase=passphrase,
chain=chain,
) as client:
# Client will be configured for testnet if our Specter instance is
# currently connected to testnet. This will prevent us from
# getting mainnet xpubs unless we set is_testnet here:
der = bip32.parse_path(derivation)
client.chain = (Chain.TEST if len(der) > 2 and der[1] == 0x80000001
else Chain.MAIN)
network = networks.get_network("main" if client.chain ==
Chain.MAIN else "test")
master_fpr = client.get_master_fingerprint().hex()
try:
xpub = client.get_pubkey_at_path(derivation).to_string()
slip132_prefix = bip32.detect_version(derivation,
default="xpub",
network=network)
xpub = convert_xpub_prefix(xpub, slip132_prefix)
return "[{}/{}]{}\n".format(master_fpr,
derivation.split("m/")[1], xpub)
except Exception as e:
logger.warning(
f"Failed to import Nested Segwit singlesig mainnet key. Error: {e}"
)
def test_miniscript(self):
# and(pk(A),after(100)) -> and_v(v:pk(A),after(100))
path = "49h/1h/0h/2h"
fgp = sim.query("fingerprint").decode()
xpub = sim.query(f"xpub m/{path}").decode()
desc = f"wsh(and_v(v:pk([{fgp}/{path}]{xpub}"+"/{0,1}/*),after(10)))"
res = sim.query("addwallet mini&"+desc, [True])
wname = wallet_prefix+"_mini"
d = Descriptor.from_string(desc)
addr = d.derive(5).address(NETWORKS['regtest'])
# check it finds the wallet correctly
sc = d.derive(5).witness_script().data.hex()
res = sim.query(f"showaddr wsh m/{path}/0/5 {sc}", [True])
self.assertEqual(res.decode(), addr)
d1 = d.derive(2, branch_index=0)
d2 = d.derive(3, branch_index=1)
# recv addr 2
addr1 = d1.address(NETWORKS['regtest'])
# change addr 3
addr2 = d2.address(NETWORKS['regtest'])
res = sim.query(f"bitcoin:{addr1}?index=2", [True])
# check it's found
self.assertFalse(b"Can't find wallet" in res)
rpc.createwallet(wname, True, True)
w = rpc.wallet(wname)
res = w.importmulti([{
"scriptPubKey": {"address": addr1},#d1.script_pubkey().data.hex(),
# "witnessscript": d1.witness_script().data.hex(),
# "pubkeys": [k.sec().hex() for k in d1.keys],
"internal": False,
"timestamp": "now",
"watchonly": True,
},{
"scriptPubKey": {"address": addr2},#d2.script_pubkey().data.hex(),
# "witnessscript": d2.witness_script().data.hex(),
# "pubkeys": [k.sec().hex() for k in d2.keys],
"internal": True,
"timestamp": "now",
"watchonly": True,
}],{"rescan": False})
self.assertTrue(all([k["success"] for k in res]))
wdefault.sendtoaddress(addr1, 0.1)
rpc.mine()
unspent = w.listunspent()
self.assertTrue(len(unspent) > 0)
unspent = [{"txid": u["txid"], "vout": u["vout"]} for u in unspent[:1]]
tx = w.createrawtransaction(unspent, [{wdefault.getnewaddress(): 0.002},{addr2: 0.09799}])
psbt = PSBT.from_base64(w.converttopsbt(tx))
# locktime magic :)
psbt.tx.locktime = 11
psbt.tx.vin[0].sequence = 10
# fillinig psbt with data
psbt.inputs[0].witness_script = d1.witness_script()
pub = ec.PublicKey.parse(d1.keys[0].sec())
psbt.inputs[0].bip32_derivations[pub] = DerivationPath(bytes.fromhex(fgp), bip32.parse_path(f"m/{path}")+[0,2])
tx = w.gettransaction(unspent[0]["txid"])
t = Transaction.from_string(tx["hex"])
psbt.inputs[0].witness_utxo = t.vout[unspent[0]["vout"]]
psbt.outputs[1].witness_script = d2.witness_script()
pub2 = ec.PublicKey.parse(d2.keys[0].sec())
psbt.outputs[1].bip32_derivations[pub2] = DerivationPath(bytes.fromhex(fgp), bip32.parse_path(f"m/{path}")+[1,3])
unsigned = psbt.to_base64()
# confirm signing
signed = sim.query("sign "+unsigned, [True])
stx = PSBT.from_base64(signed.decode())
# signed tx
t = psbt.tx
# print(stx)
t.vin[0].witness = Witness([stx.inputs[0].partial_sigs[pub], psbt.inputs[0].witness_script.data])
# broadcast
with self.assertRaises(Exception):
res = rpc.sendrawtransaction(t.serialize().hex())
rpc.mine(11)
res = rpc.sendrawtransaction(t.serialize().hex())
rpc.mine()
self.assertEqual(len(bytes.fromhex(res)), 32)
def create_psbts(self, base64_psbt, wallet):
# liquid transaction
if base64_psbt.startswith("cHNl"):
# remove rangeproofs and add sighash alls
psbt = PSET.from_string(base64_psbt)
# make sure we have tx blinding seed in the transaction
if psbt.unknown.get(b"\xfc\x07specter\x00"):
for out in psbt.outputs:
out.range_proof = None
# out.surjection_proof = None
# we know assets - we can blind it
if out.asset:
out.asset_commitment = None
out.asset_blinding_factor = None
# we know value - we can blind it
if out.value:
out.value_commitment = None
out.value_blinding_factor = None
for inp in psbt.inputs:
if inp.value and inp.asset:
inp.range_proof = None
else:
psbt = PSBT.from_string(base64_psbt)
fill_external_wallet_derivations(psbt, wallet)
base64_psbt = psbt.to_string()
psbts = super().create_psbts(base64_psbt, wallet)
# remove non-witness utxo if they are there to reduce QR code size
updated_psbt = wallet.fill_psbt(base64_psbt,
non_witness=False,
xpubs=False,
taproot_derivations=True)
try:
qr_psbt = PSBT.from_string(updated_psbt)
except:
qr_psbt = PSET.from_string(updated_psbt)
# find my key
fgp = None
derivation = None
for k in wallet.keys:
if k in self.keys and k.fingerprint and k.derivation:
fgp = bytes.fromhex(k.fingerprint)
derivation = bip32.parse_path(k.derivation)
break
# remove unnecessary derivations from inputs and outputs
for inp in qr_psbt.inputs + qr_psbt.outputs:
# keep only one derivation path (idealy ours)
found = False
pubkeys = list(inp.bip32_derivations.keys())
for i, pub in enumerate(pubkeys):
if fgp and inp.bip32_derivations[pub].fingerprint != fgp:
# only pop if we already saw our derivation
# or if it's not the last one
if found or i < len(pubkeys) - 1:
inp.bip32_derivations.pop(k, None)
else:
found = True
# remove scripts from outputs (DIY should know about the wallet)
for out in qr_psbt.outputs:
out.witness_script = None
out.redeem_script = None
# remove partial sigs from inputs
for inp in qr_psbt.inputs:
inp.partial_sigs = {}
psbts["qrcode"] = qr_psbt.to_string()
# we can add xpubs to SD card, but non_witness can be too large for MCU
psbts["sdcard"] = wallet.fill_psbt(base64_psbt,
non_witness=False,
xpubs=True,
taproot_derivations=True)
psbts["hwi"] = wallet.fill_psbt(base64_psbt,
non_witness=False,
xpubs=True,
taproot_derivations=True)
return psbts