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BOLT 2: option_shutdown_anysegwit (Feature 26/27) #672

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May 24, 2021
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BOLT 2: option_shutdown_anysegwit (Feature 26/27) #672

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1 change: 1 addition & 0 deletions .aspell.en.pws
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Expand Up @@ -386,3 +386,4 @@ csv
CHECKSIGVERIFY
IFDUP
sats
anysegwit
5 changes: 4 additions & 1 deletion 02-peer-protocol.md
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Expand Up @@ -492,7 +492,10 @@ A sending node:
(pay to pubkey hash), OR
2. `OP_HASH160` `20` 20-bytes `OP_EQUAL` (pay to script hash), OR
3. `OP_0` `20` 20-bytes (version 0 pay to witness pubkey hash), OR
4. `OP_0` `32` 32-bytes (version 0 pay to witness script hash)
4. `OP_0` `32` 32-bytes (version 0 pay to witness script hash), OR
5. if (and only if) `option_shutdown_anysegwit` is negotiated:
* `OP_1` through `OP_16` inclusive, followed by a single push of 2 to 40 bytes
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Beware that your is_witness_program() is bip 141 compliant, otherwise if the witness program size is unbounded the non-funder counterparty might inflate its scriptpubkey to burn in fees the funder balance.

(witness program versions 1 through 16)

A receiving node:
- if it hasn't received a `funding_signed` (if it is a funder) or a `funding_created` (if it is a fundee):
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2 changes: 2 additions & 0 deletions 09-features.md
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Expand Up @@ -40,6 +40,7 @@ The Context column decodes as follows:
| 18/19 | `option_support_large_channel` | Can create large channels | IN | | [BOLT #2](02-peer-protocol.md#the-open_channel-message) |
| 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] |

## Requirements

Expand Down Expand Up @@ -82,6 +83,7 @@ This work is licensed under a [Creative Commons Attribution 4.0 International Li
[bolt02-retransmit]: 02-peer-protocol.md#message-retransmission
[bolt02-open]: 02-peer-protocol.md#the-open_channel-message
[bolt03-htlc-tx]: 03-transactions.md#htlc-timeout-and-htlc-success-transactions
[bolt02-shutdown]: 02-peer-protocol.md#closing-initiation-shutdown
[bolt04]: 04-onion-routing.md
[bolt07-sync]: 07-routing-gossip.md#initial-sync
[bolt07-query]: 07-routing-gossip.md#query-messages
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