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BOLT-02+09: introduce feature bit to gate new channel_type feature - 44/45 #906

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Merged
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Dec 6, 2021
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BOLT-02+09: introduce feature bit to gate new channel_type feature - 44/45 #906

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3 changes: 3 additions & 0 deletions 02-peer-protocol.md
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Original file line number Diff line number Diff line change
Expand Up @@ -233,6 +233,8 @@ The sending node:
- MAY include `upfront_shutdown_script`.
- if it includes `open_channel_tlvs`:
- MUST include `upfront_shutdown_script`.
- if `option_channel_type` is negotiated:
- MUST set `channel_type`
- if it includes `channel_type`:
- MUST set it to a defined type representing the type it wants.
- MUST use the smallest bitmap possible to represent the channel type.
Expand All @@ -252,6 +254,7 @@ The receiving node MUST:
- discard the previous `open_channel` message.

The receiving node MAY fail the channel if:
- `option_channel_type` was negotiated but the message doesn't include a `channel_type`
- `announce_channel` is `false` (`0`), yet it wishes to publicly announce the channel.
- `funding_satoshis` is too small.
- it considers `htlc_minimum_msat` too large.
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1 change: 1 addition & 0 deletions 09-features.md
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Expand Up @@ -41,6 +41,7 @@ The Context column decodes as follows:
| 20/21 | `option_anchor_outputs` | Anchor outputs | IN | `option_static_remotekey` | [BOLT #3](03-transactions.md) |
| 22/23 | `option_anchors_zero_fee_htlc_tx` | Anchor commitment type with zero fee HTLC transactions | IN | | [BOLT #3][bolt03-htlc-tx], [lightning-dev][ml-sighash-single-harmful]|
| 26/27 | `option_shutdown_anysegwit` | Future segwit versions allowed in `shutdown` | IN | | [BOLT #2][bolt02-shutdown] |
| 44/45 | `option_channel_type` | Node supports the `channel_type` field in open/accept | IN | | [BOLT #2](02-peer-protocol.md#the-open_channel-message) |

## Definitions

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