WIP - sender fallback method

[arminsabouri]

POC an alternative to manually pushing fallback related events to the persistence layer. spawned from a dicsussion on #1542 (comment).

I hate the giant match statement. For the recv it will be even more boilerplate. And if we go this route we will probably need an async version fallback()

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[coveralls]

Coverage Report for CI Build 25558215424

Coverage decreased (-0.07%) to 85.097%

Details

• Coverage decreased (-0.07%) from the base build.
• Patch coverage: 14 uncovered changes across 3 files (15 of 29 lines covered, 51.72%).
• No coverage regressions found.

Uncovered Changes

File	Changed	Covered	%
payjoin/src/core/receive/v2/mod.rs	9	0	0.0%
payjoin-cli/src/app/v2/mod.rs	9	5	55.56%
payjoin/src/core/send/v2/session.rs	1	0	0.0%

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	13548
Covered Lines:	11529
Line Coverage:	85.1%
Coverage Strength:	399.16 hits per line

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💛 - Coveralls