Jeroen UbbinkandClaude Fable 5 7870db9af1 fix: retry foreign mint swaps with observed fees instead of trusting fee_reserve ...

A foreign mint's melt fee_reserve is a non-binding estimate (NUT-05): the
mint may demand more on the real quote or reject the melt outright (e.g.
mint.cubabitcoin.org charging input fees beyond its quote). Instead of
padding the estimate with a safety buffer that strands funds at the
foreign mint on every swap, retry the mint-quote/melt-quote/melt cycle
(max 3 attempts) with the amount recomputed from the fees the mint
actually demands.

Melt failures are classified by the NUT-00 error code (11005 registered
TransactionUnbalanced as sent by cdk, 11000 nutshell's generic
TransactionError): fee-related rejections retry, others (e.g. 20004
Lightning payment failed) surface immediately. Nutshell's Provided/needed
amounts refine the retry step when present; otherwise shrink by 1.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-06-11 15:08:38 +02:00

..

integration

fix: retry foreign mint swaps with observed fees instead of trusting fee_reserve

2026-06-11 15:08:38 +02:00

unit

fix: retry foreign mint swaps with observed fees instead of trusting fee_reserve

2026-06-11 15:08:38 +02:00

run_integration.py

dump wip stash

2025-08-06 20:31:55 -03:00