Dual-funded channels and Splicing Project Tracking

[dunxen]

Overview

Project tracking and implementation status of interactive transaction construction, dual-funding (V2 channel establishment), channel quiescence, and splicing.

Specifications:

• BOLT 2: Interactive transaction construction
• BOLT 2: Dual-funding (a.k.a V2 channel establishment)
• BOLT 2: Channel quiescence
• BOLT 2: Splicing (PR).

Wire messages

• #1794
• #2253
• #2542

Interactive Transaction Construction

• #2419
• #2989
• #3281 (depends on #3137)

Dual-funding (V2 channel establishment)

0. Refactoring

• #2077
• #2382

1. Accept dual-funded channels

• #3137
• [ ] Interop tests and fixes
• [ ] Release as alpha

2. Accept dual-funded channels with RBF

• #3281
• [ ] Interop tests and fixes
• [ ] Release as alpha

3. Create & accept dual-funded channels

• #1571
• #2302 (depends on #3137)
• [ ] Interop tests and fixes
• [ ] Release as alpha

Dual-funding implementation phase feature table

:green_circle: = supported :red_circle: = unsupported

Impl. phase	Accept V2	Create V2	RBF	Contribute funds
1. Accept V2 channels	:green_circle:	:red_circle:	:red_circle:	:red_circle:
2. Accept V2 channels w/RBF	:green_circle:	:red_circle:	:green_circle:	:red_circle:
3. Create V2 channels	:green_circle:	:green_circle:	:green_circle:	:green_circle:

Channel quiescence

• #2933
• WIP based on #2933 (should be only one PR; cc: @wpaulino)

Splicing

Prototype

• #3274 (depends on #2302)

0. Preparations

• (#3294 )
• #3295
• (#3293)
• #3317 (#3300 )
• #3316 (#3312 )
• #3332
• (more may come)

1. Basic implementation

• #3298

2. Additional features

• Integrate quiescence
• Splice on V1 channel
• RBF support
• Allow payment during pending splice
• Support splice-out
• Contributions from the acceptor
• Handle interruptions and restarts
• Work with other implementations