lukechilds
/
electrum
mirror of https://github.com/lukechilds/electrum.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

(formatting) lnsweep indentation

patch-4
ThomasV 4 years ago
parent
90b228de83
commit
e186214f6f
1 changed files with 137 additions and 108 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Unified View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 99
      electrum/lnsweep.py

99
electrum/lnsweep.py
View File

@ -70,7 +70,8 @@ def create_sweeptxs_for_watchtower(chan: 'Channel', ctx: Transaction, per_commit
# HTLCs # HTLCs
def create_sweeptx_for_htlc(*, htlc: 'UpdateAddHtlc', htlc_direction: Direction, def create_sweeptx_for_htlc(*, htlc: 'UpdateAddHtlc', htlc_direction: Direction,
ctx_output_idx: int) -> Optional[Transaction]: ctx_output_idx: int) -> Optional[Transaction]:
htlc_tx_witness_script, htlc_tx = make_htlc_tx_with_open_channel(chan=chan, htlc_tx_witness_script, htlc_tx = make_htlc_tx_with_open_channel(
chan=chan,
pcp=pcp, pcp=pcp,
subject=REMOTE, subject=REMOTE,
ctn=ctn, ctn=ctn,
@ -87,13 +88,15 @@ def create_sweeptxs_for_watchtower(chan: 'Channel', ctx: Transaction, per_commit
is_revocation=True, is_revocation=True,
config=chan.lnworker.config) config=chan.lnworker.config)
htlc_to_ctx_output_idx_map = map_htlcs_to_ctx_output_idxs(chan=chan, htlc_to_ctx_output_idx_map = map_htlcs_to_ctx_output_idxs(
chan=chan,
ctx=ctx, ctx=ctx,
pcp=pcp, pcp=pcp,
subject=REMOTE, subject=REMOTE,
ctn=ctn) ctn=ctn)
for (direction, htlc), (ctx_output_idx, htlc_relative_idx) in htlc_to_ctx_output_idx_map.items(): for (direction, htlc), (ctx_output_idx, htlc_relative_idx) in htlc_to_ctx_output_idx_map.items():
secondstage_sweep_tx = create_sweeptx_for_htlc(htlc=htlc, secondstage_sweep_tx = create_sweeptx_for_htlc(
htlc=htlc,
htlc_direction=direction, htlc_direction=direction,
ctx_output_idx=ctx_output_idx) ctx_output_idx=ctx_output_idx)
if secondstage_sweep_tx: if secondstage_sweep_tx:
@ -101,7 +104,10 @@ def create_sweeptxs_for_watchtower(chan: 'Channel', ctx: Transaction, per_commit
return txs return txs
def create_sweeptx_for_their_revoked_ctx(chan: 'Channel', ctx: Transaction, per_commitment_secret: bytes, def create_sweeptx_for_their_revoked_ctx(
chan: 'Channel',
ctx: Transaction,
per_commitment_secret: bytes,
sweep_address: str) -> Optional[Callable[[], Optional[Transaction]]]: sweep_address: str) -> Optional[Callable[[], Optional[Transaction]]]:
# prep # prep
pcp = ecc.ECPrivkey(per_commitment_secret).get_public_key_bytes(compressed=True) pcp = ecc.ECPrivkey(per_commitment_secret).get_public_key_bytes(compressed=True)
@ -130,8 +136,13 @@ def create_sweeptx_for_their_revoked_ctx(chan: 'Channel', ctx: Transaction, per_
return sweep_tx return sweep_tx
return None return None
def create_sweeptx_for_their_revoked_htlc(chan: 'Channel', ctx: Transaction, htlc_tx: Transaction,
def create_sweeptx_for_their_revoked_htlc(
chan: 'Channel',
ctx: Transaction,
htlc_tx: Transaction,
sweep_address: str) -> Optional[SweepInfo]: sweep_address: str) -> Optional[SweepInfo]:
x = analyze_ctx(chan, ctx) x = analyze_ctx(chan, ctx)
if not x: if not x:
return return
@ -141,7 +152,8 @@ def create_sweeptx_for_their_revoked_htlc(chan: 'Channel', ctx: Transaction, htl
# prep # prep
pcp = ecc.ECPrivkey(per_commitment_secret).get_public_key_bytes(compressed=True) pcp = ecc.ECPrivkey(per_commitment_secret).get_public_key_bytes(compressed=True)
this_conf, other_conf = get_ordered_channel_configs(chan=chan, for_us=False) this_conf, other_conf = get_ordered_channel_configs(chan=chan, for_us=False)
other_revocation_privkey = derive_blinded_privkey(other_conf.revocation_basepoint.privkey, other_revocation_privkey = derive_blinded_privkey(
other_conf.revocation_basepoint.privkey,
per_commitment_secret) per_commitment_secret)
to_self_delay = other_conf.to_self_delay to_self_delay = other_conf.to_self_delay
this_delayed_pubkey = derive_pubkey(this_conf.delayed_basepoint.pubkey, pcp) this_delayed_pubkey = derive_pubkey(this_conf.delayed_basepoint.pubkey, pcp)
@ -153,7 +165,6 @@ def create_sweeptx_for_their_revoked_htlc(chan: 'Channel', ctx: Transaction, htl
# check that htlc_tx is a htlc # check that htlc_tx is a htlc
if htlc_tx.outputs()[0].address != htlc_address: if htlc_tx.outputs()[0].address != htlc_address:
return return
gen_tx = lambda: create_sweeptx_ctx_to_local( gen_tx = lambda: create_sweeptx_ctx_to_local(
sweep_address=sweep_address, sweep_address=sweep_address,
ctx=htlc_tx, ctx=htlc_tx,
@ -162,15 +173,16 @@ def create_sweeptx_for_their_revoked_htlc(chan: 'Channel', ctx: Transaction, htl
privkey=other_revocation_privkey, privkey=other_revocation_privkey,
is_revocation=True, is_revocation=True,
config=chan.lnworker.config) config=chan.lnworker.config)
return SweepInfo(
return SweepInfo(name='redeem_htlc2', name='redeem_htlc2',
csv_delay=0, csv_delay=0,
cltv_expiry=0, cltv_expiry=0,
gen_tx=gen_tx) gen_tx=gen_tx)
def create_sweeptxs_for_our_ctx(
def create_sweeptxs_for_our_ctx(*, chan: 'AbstractChannel', ctx: Transaction, *, chan: 'AbstractChannel',
ctx: Transaction,
sweep_address: str) -> Optional[Dict[str, SweepInfo]]: sweep_address: str) -> Optional[Dict[str, SweepInfo]]:
"""Handle the case where we force close unilaterally with our latest ctx. """Handle the case where we force close unilaterally with our latest ctx.
Construct sweep txns for 'to_local', and for all HTLCs (2 txns each). Construct sweep txns for 'to_local', and for all HTLCs (2 txns each).
@ -221,11 +233,11 @@ def create_sweeptxs_for_our_ctx(*, chan: 'AbstractChannel', ctx: Transaction,
to_self_delay=to_self_delay, to_self_delay=to_self_delay,
config=chan.lnworker.config) config=chan.lnworker.config)
prevout = ctx.txid() + ':%d'%output_idx prevout = ctx.txid() + ':%d'%output_idx
txs[prevout] = SweepInfo(name='our_ctx_to_local', txs[prevout] = SweepInfo(
name='our_ctx_to_local',
csv_delay=to_self_delay, csv_delay=to_self_delay,
cltv_expiry=0, cltv_expiry=0,
gen_tx=sweep_tx) gen_tx=sweep_tx)
we_breached = ctn < chan.get_oldest_unrevoked_ctn(LOCAL) we_breached = ctn < chan.get_oldest_unrevoked_ctn(LOCAL)
if we_breached: if we_breached:
_logger.info("we breached.") _logger.info("we breached.")
@ -233,7 +245,8 @@ def create_sweeptxs_for_our_ctx(*, chan: 'AbstractChannel', ctx: Transaction,
return txs return txs
# HTLCs # HTLCs
def create_txns_for_htlc(*, htlc: 'UpdateAddHtlc', htlc_direction: Direction, def create_txns_for_htlc(
*, htlc: 'UpdateAddHtlc', htlc_direction: Direction,
ctx_output_idx: int, htlc_relative_idx: int): ctx_output_idx: int, htlc_relative_idx: int):
if htlc_direction == RECEIVED: if htlc_direction == RECEIVED:
preimage = chan.lnworker.get_preimage(htlc.payment_hash) preimage = chan.lnworker.get_preimage(htlc.payment_hash)
@ -258,29 +271,34 @@ def create_sweeptxs_for_our_ctx(*, chan: 'AbstractChannel', ctx: Transaction,
is_revocation=False, is_revocation=False,
config=chan.lnworker.config) config=chan.lnworker.config)
# side effect # side effect
txs[htlc_tx.inputs()[0].prevout.to_str()] = SweepInfo(name='first-stage-htlc', txs[htlc_tx.inputs()[0].prevout.to_str()] = SweepInfo(
name='first-stage-htlc',
csv_delay=0, csv_delay=0,
cltv_expiry=htlc_tx.locktime, cltv_expiry=htlc_tx.locktime,
gen_tx=lambda: htlc_tx) gen_tx=lambda: htlc_tx)
txs[htlc_tx.txid() + ':0'] = SweepInfo(name='second-stage-htlc', txs[htlc_tx.txid() + ':0'] = SweepInfo(
name='second-stage-htlc',
csv_delay=to_self_delay, csv_delay=to_self_delay,
cltv_expiry=0, cltv_expiry=0,
gen_tx=sweep_tx) gen_tx=sweep_tx)
# offered HTLCs, in our ctx --> "timeout" # offered HTLCs, in our ctx --> "timeout"
# received HTLCs, in our ctx --> "success" # received HTLCs, in our ctx --> "success"
htlc_to_ctx_output_idx_map = map_htlcs_to_ctx_output_idxs(chan=chan, htlc_to_ctx_output_idx_map = map_htlcs_to_ctx_output_idxs(
chan=chan,
ctx=ctx, ctx=ctx,
pcp=our_pcp, pcp=our_pcp,
subject=LOCAL, subject=LOCAL,
ctn=ctn) ctn=ctn)
for (direction, htlc), (ctx_output_idx, htlc_relative_idx) in htlc_to_ctx_output_idx_map.items(): for (direction, htlc), (ctx_output_idx, htlc_relative_idx) in htlc_to_ctx_output_idx_map.items():
create_txns_for_htlc(htlc=htlc, create_txns_for_htlc(
htlc=htlc,
htlc_direction=direction, htlc_direction=direction,
ctx_output_idx=ctx_output_idx, ctx_output_idx=ctx_output_idx,
htlc_relative_idx=htlc_relative_idx) htlc_relative_idx=htlc_relative_idx)
return txs return txs
def analyze_ctx(chan: 'Channel', ctx: Transaction): def analyze_ctx(chan: 'Channel', ctx: Transaction):
# note: the remote sometimes has two valid non-revoked commitment transactions, # note: the remote sometimes has two valid non-revoked commitment transactions,
# either of which could be broadcast # either of which could be broadcast
@ -309,7 +327,10 @@ def analyze_ctx(chan: 'Channel', ctx: Transaction):
return return
return ctn, their_pcp, is_revocation, per_commitment_secret return ctn, their_pcp, is_revocation, per_commitment_secret
def create_sweeptxs_for_their_ctx(*, chan: 'Channel', ctx: Transaction,
def create_sweeptxs_for_their_ctx(
*, chan: 'Channel',
ctx: Transaction,
sweep_address: str) -> Optional[Dict[str,SweepInfo]]: sweep_address: str) -> Optional[Dict[str,SweepInfo]]:
"""Handle the case when the remote force-closes with their ctx. """Handle the case when the remote force-closes with their ctx.
Sweep outputs that do not have a CSV delay ('to_remote' and first-stage HTLCs). Sweep outputs that do not have a CSV delay ('to_remote' and first-stage HTLCs).
@ -336,13 +357,13 @@ def create_sweeptxs_for_their_ctx(*, chan: 'Channel', ctx: Transaction,
if not ctx.get_output_idxs_from_address(to_local_address) \ if not ctx.get_output_idxs_from_address(to_local_address) \
and not ctx.get_output_idxs_from_address(to_remote_address): and not ctx.get_output_idxs_from_address(to_remote_address):
return return
if is_revocation: if is_revocation:
our_revocation_privkey = derive_blinded_privkey(our_conf.revocation_basepoint.privkey, per_commitment_secret) our_revocation_privkey = derive_blinded_privkey(our_conf.revocation_basepoint.privkey, per_commitment_secret)
gen_tx = create_sweeptx_for_their_revoked_ctx(chan, ctx, per_commitment_secret, chan.sweep_address) gen_tx = create_sweeptx_for_their_revoked_ctx(chan, ctx, per_commitment_secret, chan.sweep_address)
if gen_tx: if gen_tx:
tx = gen_tx() tx = gen_tx()
txs[tx.inputs()[0].prevout.to_str()] = SweepInfo(name='to_local_for_revoked_ctx', txs[tx.inputs()[0].prevout.to_str()] = SweepInfo(
name='to_local_for_revoked_ctx',
csv_delay=0, csv_delay=0,
cltv_expiry=0, cltv_expiry=0,
gen_tx=gen_tx) gen_tx=gen_tx)
@ -367,12 +388,14 @@ def create_sweeptxs_for_their_ctx(*, chan: 'Channel', ctx: Transaction,
output_idx=output_idx, output_idx=output_idx,
our_payment_privkey=our_payment_privkey, our_payment_privkey=our_payment_privkey,
config=chan.lnworker.config) config=chan.lnworker.config)
txs[prevout] = SweepInfo(name='their_ctx_to_remote', txs[prevout] = SweepInfo(
name='their_ctx_to_remote',
csv_delay=0, csv_delay=0,
cltv_expiry=0, cltv_expiry=0,
gen_tx=sweep_tx) gen_tx=sweep_tx)
# HTLCs # HTLCs
def create_sweeptx_for_htlc(htlc: 'UpdateAddHtlc', is_received_htlc: bool, def create_sweeptx_for_htlc(
htlc: 'UpdateAddHtlc', is_received_htlc: bool,
ctx_output_idx: int) -> None: ctx_output_idx: int) -> None:
if not is_received_htlc and not is_revocation: if not is_received_htlc and not is_revocation:
preimage = chan.lnworker.get_preimage(htlc.payment_hash) preimage = chan.lnworker.get_preimage(htlc.payment_hash)
@ -398,26 +421,29 @@ def create_sweeptxs_for_their_ctx(*, chan: 'Channel', ctx: Transaction,
is_revocation=is_revocation, is_revocation=is_revocation,
cltv_expiry=cltv_expiry, cltv_expiry=cltv_expiry,
config=chan.lnworker.config) config=chan.lnworker.config)
txs[prevout] = SweepInfo(name=f'their_ctx_htlc_{ctx_output_idx}', txs[prevout] = SweepInfo(
name=f'their_ctx_htlc_{ctx_output_idx}',
csv_delay=0, csv_delay=0,
cltv_expiry=cltv_expiry, cltv_expiry=cltv_expiry,
gen_tx=sweep_tx) gen_tx=sweep_tx)
# received HTLCs, in their ctx --> "timeout" # received HTLCs, in their ctx --> "timeout"
# offered HTLCs, in their ctx --> "success" # offered HTLCs, in their ctx --> "success"
htlc_to_ctx_output_idx_map = map_htlcs_to_ctx_output_idxs(chan=chan, htlc_to_ctx_output_idx_map = map_htlcs_to_ctx_output_idxs(
chan=chan,
ctx=ctx, ctx=ctx,
pcp=their_pcp, pcp=their_pcp,
subject=REMOTE, subject=REMOTE,
ctn=ctn) ctn=ctn)
for (direction, htlc), (ctx_output_idx, htlc_relative_idx) in htlc_to_ctx_output_idx_map.items(): for (direction, htlc), (ctx_output_idx, htlc_relative_idx) in htlc_to_ctx_output_idx_map.items():
create_sweeptx_for_htlc(htlc=htlc, create_sweeptx_for_htlc(
htlc=htlc,
is_received_htlc=direction == RECEIVED, is_received_htlc=direction == RECEIVED,
ctx_output_idx=ctx_output_idx) ctx_output_idx=ctx_output_idx)
return txs return txs
def create_htlctx_that_spends_from_our_ctx(chan: 'Channel', our_pcp: bytes, def create_htlctx_that_spends_from_our_ctx(
chan: 'Channel', our_pcp: bytes,
ctx: Transaction, htlc: 'UpdateAddHtlc', ctx: Transaction, htlc: 'UpdateAddHtlc',
local_htlc_privkey: bytes, preimage: Optional[bytes], local_htlc_privkey: bytes, preimage: Optional[bytes],
htlc_direction: Direction, htlc_relative_idx: int, htlc_direction: Direction, htlc_relative_idx: int,
@ -425,7 +451,8 @@ def create_htlctx_that_spends_from_our_ctx(chan: 'Channel', our_pcp: bytes,
assert (htlc_direction == RECEIVED) == bool(preimage), 'preimage is required iff htlc is received' assert (htlc_direction == RECEIVED) == bool(preimage), 'preimage is required iff htlc is received'
preimage = preimage or b'' preimage = preimage or b''
ctn = extract_ctn_from_tx_and_chan(ctx, chan) ctn = extract_ctn_from_tx_and_chan(ctx, chan)
witness_script, htlc_tx = make_htlc_tx_with_open_channel(chan=chan, witness_script, htlc_tx = make_htlc_tx_with_open_channel(
chan=chan,
pcp=our_pcp, pcp=our_pcp,
subject=LOCAL, subject=LOCAL,
ctn=ctn, ctn=ctn,
@ -442,7 +469,8 @@ def create_htlctx_that_spends_from_our_ctx(chan: 'Channel', our_pcp: bytes,
return witness_script, htlc_tx return witness_script, htlc_tx
def create_sweeptx_their_ctx_htlc(ctx: Transaction, witness_script: bytes, sweep_address: str, def create_sweeptx_their_ctx_htlc(
ctx: Transaction, witness_script: bytes, sweep_address: str,
preimage: Optional[bytes], output_idx: int, preimage: Optional[bytes], output_idx: int,
privkey: bytes, is_revocation: bool, privkey: bytes, is_revocation: bool,
cltv_expiry: int, config: SimpleConfig) -> Optional[PartialTransaction]: cltv_expiry: int, config: SimpleConfig) -> Optional[PartialTransaction]:
@ -472,7 +500,8 @@ def create_sweeptx_their_ctx_htlc(ctx: Transaction, witness_script: bytes, sweep
return tx return tx
def create_sweeptx_their_ctx_to_remote(sweep_address: str, ctx: Transaction, output_idx: int, def create_sweeptx_their_ctx_to_remote(
sweep_address: str, ctx: Transaction, output_idx: int,
our_payment_privkey: ecc.ECPrivkey, our_payment_privkey: ecc.ECPrivkey,
config: SimpleConfig) -> Optional[PartialTransaction]: config: SimpleConfig) -> Optional[PartialTransaction]:
our_payment_pubkey = our_payment_privkey.get_public_key_hex(compressed=True) our_payment_pubkey = our_payment_privkey.get_public_key_hex(compressed=True)
@ -497,7 +526,8 @@ def create_sweeptx_their_ctx_to_remote(sweep_address: str, ctx: Transaction, out
return sweep_tx return sweep_tx
def create_sweeptx_ctx_to_local(*, sweep_address: str, ctx: Transaction, output_idx: int, witness_script: str, def create_sweeptx_ctx_to_local(
*, sweep_address: str, ctx: Transaction, output_idx: int, witness_script: str,
privkey: bytes, is_revocation: bool, config: SimpleConfig, privkey: bytes, is_revocation: bool, config: SimpleConfig,
to_self_delay: int=None) -> Optional[PartialTransaction]: to_self_delay: int=None) -> Optional[PartialTransaction]:
"""Create a txn that sweeps the 'to_local' output of a commitment """Create a txn that sweeps the 'to_local' output of a commitment
@ -529,8 +559,8 @@ def create_sweeptx_ctx_to_local(*, sweep_address: str, ctx: Transaction, output_
return sweep_tx return sweep_tx
def create_sweeptx_that_spends_htlctx_that_spends_htlc_in_ctx(*, def create_sweeptx_that_spends_htlctx_that_spends_htlc_in_ctx(
htlc_tx: Transaction, htlctx_witness_script: bytes, sweep_address: str, *, htlc_tx: Transaction, htlctx_witness_script: bytes, sweep_address: str,
privkey: bytes, is_revocation: bool, to_self_delay: int, privkey: bytes, is_revocation: bool, to_self_delay: int,
config: SimpleConfig) -> Optional[PartialTransaction]: config: SimpleConfig) -> Optional[PartialTransaction]:
val = htlc_tx.outputs()[0].value val = htlc_tx.outputs()[0].value
@ -549,7 +579,6 @@ def create_sweeptx_that_spends_htlctx_that_spends_htlc_in_ctx(*,
if outvalue <= dust_threshold(): return None if outvalue <= dust_threshold(): return None
sweep_outputs = [PartialTxOutput.from_address_and_value(sweep_address, outvalue)] sweep_outputs = [PartialTxOutput.from_address_and_value(sweep_address, outvalue)]
tx = PartialTransaction.from_io(sweep_inputs, sweep_outputs, version=2) tx = PartialTransaction.from_io(sweep_inputs, sweep_outputs, version=2)
sig = bfh(tx.sign_txin(0, privkey)) sig = bfh(tx.sign_txin(0, privkey))
witness = construct_witness([sig, int(is_revocation), htlctx_witness_script]) witness = construct_witness([sig, int(is_revocation), htlctx_witness_script])
tx.inputs()[0].witness = bfh(witness) tx.inputs()[0].witness = bfh(witness)

Write Preview
Loading…
Cancel
Save