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lnonion: use IntEnum and IntFlag for failure codes

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This commit is contained in:
SomberNight
2018-10-09 21:23:22 +02:00
committed by ThomasV
parent 864efa029b
commit a8ace7ef4f
2 changed files with 48 additions and 33 deletions
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70
electrum/lnonion.py
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@@ -27,6 +27,7 @@ import hashlib
import hmac
from collections import namedtuple
from typing import Sequence
from enum import IntEnum, IntFlag
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms
from cryptography.hazmat.backends import default_backend
@@ -299,33 +300,46 @@ def get_failure_msg_from_onion_error(decrypted_error_packet: bytes) -> OnionRout
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',
}
class OnionFailureCodeMetaFlag(IntFlag):
BADONION = 0x8000
PERM = 0x4000
NODE = 0x2000
UPDATE = 0x1000
BADONION = OnionFailureCodeMetaFlag.BADONION
PERM = OnionFailureCodeMetaFlag.PERM
NODE = OnionFailureCodeMetaFlag.NODE
UPDATE = OnionFailureCodeMetaFlag.UPDATE
class OnionFailureCode(IntEnum):
INVALID_REALM = PERM | 1
TEMPORARY_NODE_FAILURE = NODE | 2
PERMANENT_NODE_FAILURE = PERM | NODE | 2
REQUIRED_NODE_FEATURE_MISSING = PERM | NODE | 3
INVALID_ONION_VERSION = BADONION | PERM | 4
INVALID_ONION_HMAC = BADONION | PERM | 5
INVALID_ONION_KEY = BADONION | PERM | 6
TEMPORARY_CHANNEL_FAILURE = UPDATE | 7
PERMANENT_CHANNEL_FAILURE = PERM | 8
REQUIRED_CHANNEL_FEATURE_MISSING = PERM | 9
UNKNOWN_NEXT_PEER = PERM | 10
AMOUNT_BELOW_MINIMUM = UPDATE | 11
FEE_INSUFFICIENT = UPDATE | 12
INCORRECT_CLTV_EXPIRY = UPDATE | 13
EXPIRY_TOO_SOON = UPDATE | 14
UNKNOWN_PAYMENT_HASH = PERM | 15
INCORRECT_PAYMENT_AMOUNT = PERM | 16
FINAL_EXPIRY_TOO_SOON = 17
FINAL_INCORRECT_CLTV_EXPIRY = 18
FINAL_INCORRECT_HTLC_AMOUNT = 19
CHANNEL_DISABLED = UPDATE | 20
EXPIRY_TOO_FAR = 21
@classmethod
def _missing_(cls, value: int) -> int:
# note that for unknown error codes, we return an int,
# not an instance of cls
return value
# don't use these elsewhere, the names are ambiguous without context
del BADONION; del PERM; del NODE; del UPDATE