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decode onion errors to failure message type

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SomberNight 2018-08-01 19:06:43 +02:00
parent dea0c7ebbf
commit eef8cd0d20
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2 changed files with 38 additions and 12 deletions
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18
electrum/lnbase.py
View file

@ -31,7 +31,7 @@ from . import constants
from . import transaction
from .util import PrintError, bh2u, print_error, bfh
from .transaction import opcodes, Transaction
from .lnonion import new_onion_packet, OnionHopsDataSingle, OnionPerHop, decode_onion_error
from .lnonion import new_onion_packet, OnionHopsDataSingle, OnionPerHop, decode_onion_error, ONION_FAILURE_CODE_MAP
from .lnaddr import lndecode
from .lnhtlc import UpdateAddHtlc, HTLCStateMachine, RevokeAndAck, SettleHtlc
@ -817,25 +817,19 @@ class Peer(PrintError):
route = self.attempted_route[key]
failure_msg, sender_idx = decode_onion_error(payload["reason"], [x.node_id for x in route], self.secret_key)
code = failure_msg.code
code_name = ONION_FAILURE_CODE_MAP.get(code, 'unknown_error!!')
data = failure_msg.data
codes = []
if code & 0x8000:
codes += ["BADONION"]
if code & 0x4000:
codes += ["PERM"]
if code & 0x2000:
codes += ["NODE"]
if code & 0x1000:
codes += ["UPDATE"]
print("UPDATE_FAIL_HTLC", codes, code, data)
print("UPDATE_FAIL_HTLC", code_name, code, data)
try:
short_chan_id = route[sender_idx + 1].short_channel_id
except IndexError:
print("payment destination reported error")
else:
# TODO this should depend on the error
# also, we need finer blacklisting (directed edges; nodes)
self.network.path_finder.blacklist.add(short_chan_id)
self.update_fail_htlc[payload["channel_id"]].put_nowait("HTLC failure with code {} (categories {})".format(code, codes))
self.update_fail_htlc[payload["channel_id"]].put_nowait("HTLC failure with code {} ({})".format(code, code_name))
@aiosafe
async def pay(self, path, chan, amount_msat, payment_hash, pubkey_in_invoice, min_final_cltv_expiry):

32
electrum/lnonion.py
View file

@ -297,3 +297,35 @@ def get_failure_msg_from_onion_error(decrypted_error_packet: bytes) -> OnionRout
failure_code = int.from_bytes(failure_msg[:2], byteorder='big')
failure_data = failure_msg[2:]
return OnionRoutingFailureMessage(failure_code, failure_data)
ONION_FC_BADONION = BADONION = 0x8000
ONION_FC_PERM = PERM = 0x4000
ONION_FC_NODE = NODE = 0x2000
ONION_FC_UPDATE = UPDATE = 0x1000
ONION_FAILURE_CODE_MAP = {
PERM | 1 : 'invalid_realm',
NODE | 2 : 'temporary_node_failure',
PERM | NODE | 2 : 'permanent_node_failure',
PERM | NODE | 3 : 'required_node_feature_missing',
BADONION | PERM | 4 : 'invalid_onion_version',
BADONION | PERM | 5 : 'invalid_onion_hmac',
BADONION | PERM | 6 : 'invalid_onion_key',
UPDATE | 7 : 'temporary_channel_failure',
PERM | 8 : 'permanent_channel_failure',
PERM | 9 : 'required_channel_feature_missing',
PERM | 10 : 'unknown_next_peer',
UPDATE | 11 : 'amount_below_minimum',
UPDATE | 12 : 'fee_insufficient',
UPDATE | 13 : 'incorrect_cltv_expiry',
UPDATE | 14 : 'expiry_too_soon',
PERM | 15 : 'unknown_payment_hash',
PERM | 16 : 'incorrect_payment_amount',
17 : 'final_expiry_too_soon',
18 : 'final_incorrect_cltv_expiry',
19 : 'final_incorrect_htlc_amount',
UPDATE | 20 : 'channel_disabled',
21 : 'expiry_too_far',
}
# don't use these elsewhere, the names are ambiguous without context
del BADONION; del PERM; del NODE; del UPDATE