Lightning Network `channel_update` message Flag clarification
This is a lnd.log line:
2019-01-11 12:20:13.904 [DBG] PEER: Sending ChannelUpdate(chain_hash=000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f, short_chan_id=601495532567724033, flag=256, update_time=2019-01-11 12:19:08 +0100 CET) to 46.229.165.136:9735
Since I cannot find a direct correlation with the spec at https://github.com/lightningnetwork/lightning-rfc/blob/master/07-routing-gossip.md
can someone clarify the "flag" value?
Where can I find the information below?
[1:message_flags]
[1:channel_flags]
[2:cltv_expiry_delta]
[8:htlc_minimum_msat]
[4:fee_base_msat]
[4:fee_proportional_millionths]
[8:htlc_maximum_msat] (option_channel_htlc_max)
Are they encoded in some way in this "flag"? How?
lightning-network lightning-network-daemon lightning-rfc channels
edited Jan 11 at 19:01
cdecker
7,02312954
asked Jan 11 at 16:16
Stefano AngieriStefano Angieri
161
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Stefano Angieri is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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This is a lnd.log line:
2019-01-11 12:20:13.904 [DBG] PEER: Sending ChannelUpdate(chain_hash=000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f, short_chan_id=601495532567724033, flag=256, update_time=2019-01-11 12:19:08 +0100 CET) to 46.229.165.136:9735
Since I cannot find a direct correlation with the spec at https://github.com/lightningnetwork/lightning-rfc/blob/master/07-routing-gossip.md
can someone clarify the "flag" value?
Where can I find the information below?
[1:message_flags]
[1:channel_flags]
[2:cltv_expiry_delta]
[8:htlc_minimum_msat]
[4:fee_base_msat]
[4:fee_proportional_millionths]
[8:htlc_maximum_msat] (option_channel_htlc_max)
Are they encoded in some way in this "flag"? How?
lightning-network lightning-network-daemon lightning-rfc channels
edited Jan 11 at 19:01
cdecker
7,02312954
asked Jan 11 at 16:16
Stefano AngieriStefano Angieri
161
New contributor
Stefano Angieri is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
This is a lnd.log line:
2019-01-11 12:20:13.904 [DBG] PEER: Sending ChannelUpdate(chain_hash=000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f, short_chan_id=601495532567724033, flag=256, update_time=2019-01-11 12:19:08 +0100 CET) to 46.229.165.136:9735
Since I cannot find a direct correlation with the spec at https://github.com/lightningnetwork/lightning-rfc/blob/master/07-routing-gossip.md
can someone clarify the "flag" value?
Where can I find the information below?
[1:message_flags]
[1:channel_flags]
[2:cltv_expiry_delta]
[8:htlc_minimum_msat]
[4:fee_base_msat]
[4:fee_proportional_millionths]
[8:htlc_maximum_msat] (option_channel_htlc_max)
Are they encoded in some way in this "flag"? How?
lightning-network lightning-network-daemon lightning-rfc channels
edited Jan 11 at 19:01
cdecker
7,02312954
asked Jan 11 at 16:16
Stefano AngieriStefano Angieri
161
New contributor
Stefano Angieri is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
This is a lnd.log line:
2019-01-11 12:20:13.904 [DBG] PEER: Sending ChannelUpdate(chain_hash=000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f, short_chan_id=601495532567724033, flag=256, update_time=2019-01-11 12:19:08 +0100 CET) to 46.229.165.136:9735
Since I cannot find a direct correlation with the spec at https://github.com/lightningnetwork/lightning-rfc/blob/master/07-routing-gossip.md
can someone clarify the "flag" value?
Where can I find the information below?
[1:message_flags]
[1:channel_flags]
[2:cltv_expiry_delta]
[8:htlc_minimum_msat]
[4:fee_base_msat]
[4:fee_proportional_millionths]
[8:htlc_maximum_msat] (option_channel_htlc_max)
Are they encoded in some way in this "flag"? How?
lightning-network lightning-network-daemon lightning-rfc channels
lightning-network lightning-network-daemon lightning-rfc channels
edited Jan 11 at 19:01
cdecker
7,02312954
asked Jan 11 at 16:16
Stefano AngieriStefano Angieri
161
New contributor
Stefano Angieri is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited Jan 11 at 19:01
cdecker
7,02312954
asked Jan 11 at 16:16
Stefano AngieriStefano Angieri
161
New contributor
Stefano Angieri is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited Jan 11 at 19:01
cdecker
7,02312954
edited Jan 11 at 19:01
cdecker
7,02312954
edited Jan 11 at 19:01
cdecker
7,02312954
7,02312954
asked Jan 11 at 16:16
Stefano AngieriStefano Angieri
161
New contributor
Stefano Angieri is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked Jan 11 at 16:16
Stefano AngieriStefano Angieri
161
asked Jan 11 at 16:16
Stefano AngieriStefano Angieri
161
161
New contributor
Stefano Angieri is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Stefano Angieri is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Stefano Angieri is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
1 Answer
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The flags field (2 bytes) has been split into two different (1 byte) fields, the message_flags (most significant bits) and the channel_flags field (least significant bits). Hence the flags value displayed in lnd has the message_flags byte set to 0x00 and the message_flags set to 0x01.
message_flags indicates that this channel_update has some optional fields appended to the end. In this case it has the 0th bit set, which corresponds to the option_channel_htlc_max option, hence the channel_update has an additional field htlc_maximum_msat appended.
answered Jan 11 at 19:08
cdeckercdecker
7,02312954
add a comment |
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The flags field (2 bytes) has been split into two different (1 byte) fields, the message_flags (most significant bits) and the channel_flags field (least significant bits). Hence the flags value displayed in lnd has the message_flags byte set to 0x00 and the message_flags set to 0x01.
message_flags indicates that this channel_update has some optional fields appended to the end. In this case it has the 0th bit set, which corresponds to the option_channel_htlc_max option, hence the channel_update has an additional field htlc_maximum_msat appended.
answered Jan 11 at 19:08
cdeckercdecker
7,02312954
add a comment |
The flags field (2 bytes) has been split into two different (1 byte) fields, the message_flags (most significant bits) and the channel_flags field (least significant bits). Hence the flags value displayed in lnd has the message_flags byte set to 0x00 and the message_flags set to 0x01.
message_flags indicates that this channel_update has some optional fields appended to the end. In this case it has the 0th bit set, which corresponds to the option_channel_htlc_max option, hence the channel_update has an additional field htlc_maximum_msat appended.
answered Jan 11 at 19:08
cdeckercdecker
7,02312954
add a comment |
The flags field (2 bytes) has been split into two different (1 byte) fields, the message_flags (most significant bits) and the channel_flags field (least significant bits). Hence the flags value displayed in lnd has the message_flags byte set to 0x00 and the message_flags set to 0x01.
message_flags indicates that this channel_update has some optional fields appended to the end. In this case it has the 0th bit set, which corresponds to the option_channel_htlc_max option, hence the channel_update has an additional field htlc_maximum_msat appended.
answered Jan 11 at 19:08
cdeckercdecker
7,02312954
The flags field (2 bytes) has been split into two different (1 byte) fields, the message_flags (most significant bits) and the channel_flags field (least significant bits). Hence the flags value displayed in lnd has the message_flags byte set to 0x00 and the message_flags set to 0x01.
message_flags indicates that this channel_update has some optional fields appended to the end. In this case it has the 0th bit set, which corresponds to the option_channel_htlc_max option, hence the channel_update has an additional field htlc_maximum_msat appended.
answered Jan 11 at 19:08
cdeckercdecker
7,02312954
answered Jan 11 at 19:08
cdeckercdecker
7,02312954
answered Jan 11 at 19:08
cdeckercdecker
7,02312954
answered Jan 11 at 19:08
cdeckercdecker
7,02312954
7,02312954
add a comment |
add a comment |
Stefano Angieri is a new contributor. Be nice, and check out our Code of Conduct.
Stefano Angieri is a new contributor. Be nice, and check out our Code of Conduct.
Stefano Angieri is a new contributor. Be nice, and check out our Code of Conduct.
Stefano Angieri is a new contributor. Be nice, and check out our Code of Conduct.
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