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channel_establishment_flow: use get_per_commitment_secret_from_seed

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SomberNight 2018-04-20 13:22:56 +02:00 • committed by ThomasV
parent edf6fe7a94
commit e9bad2e862
1 changed files with 16 additions and 8 deletions
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24
lib/lnbase.py
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@ -684,7 +684,8 @@ class Peer(PrintError):
htlc_basepoint, htlc_privkey = next(keys)
delayed_payment_basepoint, delayed_privkey = next(keys)
base_secret = 0x000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f
per_commitment_secret = 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100
per_commitment_secret_seed = 0x1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100.to_bytes(length=32, byteorder="big")
per_commitment_secret_index = 2**48 - 1
# amounts
funding_satoshis = 200000
push_msat = 0
@ -694,7 +695,9 @@ class Peer(PrintError):
ctn = 0
#
base_point = secret_to_pubkey(base_secret)
per_commitment_point = secret_to_pubkey(per_commitment_secret)
per_commitment_point_first = secret_to_pubkey(int.from_bytes(
get_per_commitment_secret_from_seed(per_commitment_secret_seed, per_commitment_secret_index),
byteorder="big"))
msg = gen_msg(
"open_channel",
temporary_channel_id=temp_channel_id,
@ -709,7 +712,7 @@ class Peer(PrintError):
htlc_basepoint=htlc_basepoint,
payment_basepoint=base_point,
delayed_payment_basepoint=delayed_payment_basepoint,
first_per_commitment_point=per_commitment_point,
first_per_commitment_point=per_commitment_point_first,
to_self_delay=to_self_delay
)
self.channel_accepted[temp_channel_id] = asyncio.Future()
@ -728,6 +731,7 @@ class Peer(PrintError):
funding_txn_minimum_depth = int.from_bytes(payload['minimum_depth'], byteorder="big")
self.print_error('remote dust limit', remote_dust_limit_satoshis)
self.print_error('remote delay', remote_delay)
self.print_error('funding_txn_minimum_depth', funding_txn_minimum_depth)
# create funding tx
pubkeys = sorted([bh2u(funding_pubkey), bh2u(remote_funding_pubkey)])
redeem_script = transaction.multisig_script(pubkeys, 2)
@ -739,11 +743,11 @@ class Peer(PrintError):
# derive keys
localpubkey = derive_pubkey(base_point, remote_per_commitment_point)
localprivkey = derive_privkey(base_secret, remote_per_commitment_point)
remotepubkey = derive_pubkey(remote_payment_basepoint, per_commitment_point)
remotepubkey = derive_pubkey(remote_payment_basepoint, per_commitment_point_first)
revocation_pubkey = derive_blinded_pubkey(revocation_basepoint, remote_per_commitment_point)
remote_revocation_pubkey = derive_blinded_pubkey(remote_revocation_basepoint, per_commitment_point)
remote_revocation_pubkey = derive_blinded_pubkey(remote_revocation_basepoint, per_commitment_point_first)
local_delayedpubkey = derive_pubkey(delayed_payment_basepoint, remote_per_commitment_point)
remote_delayedpubkey = derive_pubkey(remote_delayed_payment_basepoint, per_commitment_point)
remote_delayedpubkey = derive_pubkey(remote_delayed_payment_basepoint, per_commitment_point_first)
# compute amounts
htlcs = []
fee = local_feerate * overall_weight(len(htlcs)) // 1000
@ -814,13 +818,17 @@ class Peer(PrintError):
await self.local_funding_locked[channel_id]
finally:
del self.local_funding_locked[channel_id]
self.send_message(gen_msg("funding_locked", channel_id=channel_id, next_per_commitment_point=next_per_commitment_point))
per_commitment_secret_index -= 1
per_commitment_point_second = secret_to_pubkey(int.from_bytes(
get_per_commitment_secret_from_seed(per_commitment_secret_seed, per_commitment_secret_index),
byteorder="big"))
self.send_message(gen_msg("funding_locked", channel_id=channel_id, next_per_commitment_point=per_commitment_point_second))
# wait until we receive funding_locked
try:
payload = await self.remote_funding_locked[channel_id]
finally:
del self.remote_funding_locked[channel_id]
self.print_error('Done waiting for remote_funding_locked')
self.print_error('Done waiting for remote_funding_locked', payload)
def on_update_add_htlc(self, payload):
# no onion routing for the moment: we assume we are the end node