After stopping the maker service, and initiating a collaborative transaction, it seems it took it's own offer and tried to create a transaction. This happened on regtest after stopping the maker (via rpc) and trying to initiate a collaborative transaction (with 1 counterparty) shortly after.
While this is an edge case and extremely unlikely to happen on mainnet, I think it provides valuable information about the seemingly unclean shutdown of the maker deamon. Maybe this happens only via RPC (as this occurred while using the Jam development environment), but it is nontheless a problem in production, as there were also reports about "old" offers being taking when a new one with other fee settings was actually active. So, my humble guess is, there is something wrong with the shutdown procedure of the subservices.
Below are the logs. Notice the input 3089559b2605cb8d57d553a53c1e963f9c8f9415c3afd22f8de95563e41256e4:0 is included twice. Which hints at that somehow the service was selecting itself as the counterparty.
2024-06-21 01:12:36,277 [INFO] obtained tx
{
"hex": "0200000002e45612e46355e98d2fd2afc315948f9c3f961e3ca553d5578dcb05269b5589300000000000feffffffe45612e46355e98d2fd2afc315948f9c3f961e3ca553d5578dcb05269b5589300000000000feffffff045714a78d000000001600141bffae399b921a34edab9f91dcdaef92d5a5759ce52ca78d00000000160014b01681b2424a6262e30f14375759d125a9902b0f15cd5b070000000016001496f4e323b91782e3af0ae9e6412eea344ba3fc0715cd5b070000000016001440df71c21182ef7d34f4da300ac7e6cfe2d182ab36010000",
"inputs": [
{
"outpoint": "3089559b2605cb8d57d553a53c1e963f9c8f9415c3afd22f8de95563e41256e4:0",
"scriptSig": "",
"nSequence": 4294967294,
"witness": "00"
},
{
"outpoint": "3089559b2605cb8d57d553a53c1e963f9c8f9415c3afd22f8de95563e41256e4:0",
"scriptSig": "",
"nSequence": 4294967294,
"witness": "00"
}
],
"outputs": [
{
"value_sats": 2376537175,
"scriptPubKey": "00141bffae399b921a34edab9f91dcdaef92d5a5759c",
"address": "bcrt1qr0l6uwvmjgdrfmdtn7gaekh0jt262avu4d4wl3"
},
{
"value_sats": 2376543461,
"scriptPubKey": "0014b01681b2424a6262e30f14375759d125a9902b0f",
"address": "bcrt1qkqtgrvjzff3x9cc0zsm4wkw3yk5eq2c04gf7r6"
},
{
"value_sats": 123456789,
"scriptPubKey": "001496f4e323b91782e3af0ae9e6412eea344ba3fc07",
"address": "bcrt1qjm6wxgaez7pw8tc2a8nyzth2x3968lq82rkagy"
},
{
"value_sats": 123456789,
"scriptPubKey": "001440df71c21182ef7d34f4da300ac7e6cfe2d182ab",
"address": "bcrt1qgr0hrss3sthh6d85mgcq43lxel3drq4tztjfwm"
}
],
"txid": "d710a90f4b416b05d9d62680558b156aab28d4353c0620da2f47d2c090e2b000",
"nLockTime": 310,
"nVersion": 2
}
2024-06-21 01:12:36,280 [INFO] potentially earned = 0.00000250 BTC (250 sat)
2024-06-21 01:12:36,280 [INFO] mycjaddr, mychange = bcrt1qjm6wxgaez7pw8tc2a8nyzth2x3968lq82rkagy, bcrt1qkqtgrvjzff3x9cc0zsm4wkw3yk5eq2c04gf7r6
2024-06-21 01:12:36,281 [INFO] goodtx
2024-06-21 01:12:36,300 [DEBUG] >>privmsg on onion-network: nick=J56hWPQbRMoucz2V cmd=sig msg=55mwm/Uz4mLcogG4xEhLK8tkJZqbf7DSb9G0RmuYx0TThS6SrB4Ltc4wlOhMnfCdjOcdu9jdd9McTGURXCQuCPfeM5U7dKy2obAkoH9Fvb/k2ul9UkpUQD5HvBfmgdnesYiAy3RJHpdrd1/vfs+j6AgbnIwBw8g1agBPteE4yM0JEqTuaZRrgkhS7VZapV0SG+NJ2sAJzjCOcR2IA7g7bLXfJmbDisjJX0zO09HUeitvyoVrxlwOMQ== 0347b7e9a4ae8ae2ed57c0ab6b4d3e4c6e74e9622d56295eee61765bfd81bc80de MEQCIDIdXrxngxhApd8y4Bgcbt1Oc1rK3EKP5s+/+gtGYAW/AiBcir3hQpeyNmgJCfrbCoiKrdhIDOhWC0FbHLQ9BB6dmQ==
2024-06-21 01:12:36,300 [DEBUG] >>privmsg on onion-network: nick=J56hWPQbRMoucz2V cmd=sig msg=ZdESXJbbQUgjsXPpK5IlPBXQrgLfuqwUM14BRkYIB249TIszcQRZ5fedpKbeZRnx9BLsCL1Rb12lv8l1Qr4VKm0/pwA2wU3wJyc+P62tY5zaLu/jIaektFcAlewzr3M78+TSRDfjOxY69RBUpGjySaCGbJYHWsNwDKkt9hH6fiLsE6ww5Lh7h7t1mapr6n7K13KJ+0NTAbJ5re4gdRW6xX0+FLh9geUvGe2aCpVohiMEtW7XCxeSrQ== 0347b7e9a4ae8ae2ed57c0ab6b4d3e4c6e74e9622d56295eee61765bfd81bc80de MEUCIQCVlAgzSC+xx1OS5hW6RC9EDLOZu6LvBo6o12sNbXa5jAIgEwNbPkZ8oPlVLwZt6ILnt0Fdvfi87YJwuww6c8mQdss=
2024-06-21 01:12:36,645 [DEBUG] signature did not match anything in the tx
Unhandled Error
Traceback (most recent call last):
File "/usr/local/lib/python3.9/dist-packages/twisted/protocols/amp.py", line 1010, in _commandReceived
deferred = self.dispatchCommand(box)
File "/usr/local/lib/python3.9/dist-packages/twisted/protocols/amp.py", line 1067, in dispatchCommand
return maybeDeferred(responder, box)
File "/usr/local/lib/python3.9/dist-packages/twisted/internet/defer.py", line 209, in maybeDeferred
result = f(*args, **kwargs)
File "/usr/local/lib/python3.9/dist-packages/twisted/protocols/amp.py", line 1161, in doit
maybeDeferred(aCallable, **kw)
--- <exception caught here> ---
File "/usr/local/lib/python3.9/dist-packages/twisted/internet/defer.py", line 1075, in _runCallbacks
current.result = callback( # type: ignore[misc]
File "/usr/local/lib/python3.9/dist-packages/twisted/protocols/amp.py", line 1141, in checkKnownErrors
key = error.trap(*command.allErrors)
File "/usr/local/lib/python3.9/dist-packages/twisted/python/failure.py", line 481, in trap
self.raiseException()
File "/usr/local/lib/python3.9/dist-packages/twisted/python/failure.py", line 505, in raiseException
raise self.value.with_traceback(self.tb)
File "/usr/local/lib/python3.9/dist-packages/twisted/internet/defer.py", line 209, in maybeDeferred
result = f(*args, **kwargs)
File "/src/src/jmclient/client_protocol.py", line 739, in on_JM_SIG_RECEIVED
retval = self.client.on_sig(nick, sig)
File "/src/src/jmclient/taker.py", line 755, in on_sig
assert not len(self.nonrespondants)
builtins.AssertionError:
2024-06-21 01:12:36,653 [DEBUG] signature did not match anything in the tx
Unhandled Error
Traceback (most recent call last):
File "/usr/local/lib/python3.9/dist-packages/twisted/protocols/amp.py", line 1010, in _commandReceived
deferred = self.dispatchCommand(box)
File "/usr/local/lib/python3.9/dist-packages/twisted/protocols/amp.py", line 1067, in dispatchCommand
return maybeDeferred(responder, box)
File "/usr/local/lib/python3.9/dist-packages/twisted/internet/defer.py", line 209, in maybeDeferred
result = f(*args, **kwargs)
File "/usr/local/lib/python3.9/dist-packages/twisted/protocols/amp.py", line 1161, in doit
maybeDeferred(aCallable, **kw)
--- <exception caught here> ---
File "/usr/local/lib/python3.9/dist-packages/twisted/internet/defer.py", line 1075, in _runCallbacks
current.result = callback( # type: ignore[misc]
File "/usr/local/lib/python3.9/dist-packages/twisted/protocols/amp.py", line 1141, in checkKnownErrors
key = error.trap(*command.allErrors)
File "/usr/local/lib/python3.9/dist-packages/twisted/python/failure.py", line 481, in trap
self.raiseException()
File "/usr/local/lib/python3.9/dist-packages/twisted/python/failure.py", line 505, in raiseException
raise self.value.with_traceback(self.tb)
File "/usr/local/lib/python3.9/dist-packages/twisted/internet/defer.py", line 209, in maybeDeferred
result = f(*args, **kwargs)
File "/src/src/jmclient/client_protocol.py", line 739, in on_JM_SIG_RECEIVED
retval = self.client.on_sig(nick, sig)
File "/src/src/jmclient/taker.py", line 755, in on_sig
assert not len(self.nonrespondants)
builtins.AssertionError:
Amp server or network failure unhandled by client application. Dropping connection! To avoid, add errbacks to ALL remote commands!
Traceback (most recent call last):
--- <exception caught here> ---
File "/usr/local/lib/python3.9/dist-packages/twisted/internet/defer.py", line 1075, in _runCallbacks
current.result = callback( # type: ignore[misc]
File "/src/src/jmdaemon/daemon_protocol.py", line 499, in defaultErrback
failure.trap(ConnectionAborted, ConnectionClosed,
File "/usr/local/lib/python3.9/dist-packages/twisted/python/failure.py", line 481, in trap
self.raiseException()
File "/usr/local/lib/python3.9/dist-packages/twisted/python/failure.py", line 505, in raiseException
raise self.value.with_traceback(self.tb)
twisted.protocols.amp.UnknownRemoteError: Code<UNKNOWN>: Unknown Error
Amp server or network failure unhandled by client application. Dropping connection! To avoid, add errbacks to ALL remote commands!
Traceback (most recent call last):
--- <exception caught here> ---
File "/usr/local/lib/python3.9/dist-packages/twisted/internet/defer.py", line 1075, in _runCallbacks
current.result = callback( # type: ignore[misc]
File "/src/src/jmdaemon/daemon_protocol.py", line 499, in defaultErrback
failure.trap(ConnectionAborted, ConnectionClosed,
File "/usr/local/lib/python3.9/dist-packages/twisted/python/failure.py", line 481, in trap
self.raiseException()
File "/usr/local/lib/python3.9/dist-packages/twisted/python/failure.py", line 505, in raiseException
raise self.value.with_traceback(self.tb)
twisted.protocols.amp.UnknownRemoteError: Code<UNKNOWN>: Unknown Error
After stopping the maker service, and initiating a collaborative transaction, it seems it took it's own offer and tried to create a transaction. This happened on
regtestafter stopping the maker (via rpc) and trying to initiate a collaborative transaction (with 1 counterparty) shortly after.While this is an edge case and extremely unlikely to happen on
mainnet, I think it provides valuable information about the seemingly unclean shutdown of the maker deamon. Maybe this happens only via RPC (as this occurred while using the Jam development environment), but it is nontheless a problem in production, as there were also reports about "old" offers being taking when a new one with other fee settings was actually active. So, my humble guess is, there is something wrong with the shutdown procedure of the subservices.Below are the logs. Notice the input
3089559b2605cb8d57d553a53c1e963f9c8f9415c3afd22f8de95563e41256e4:0is included twice. Which hints at that somehow the service was selecting itself as the counterparty.