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lightningd: mutual close no longer falls back to broadcasting the commitment - #9516

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ksedgwic:fix-close-fee-reject-fallthrough

Commits on Sep 16, 2026
- tests: reproduce a mutual close at the fee ceiling falling back to the commitment
  
  ksedgwic
  authored and
  daywalker90
  committed
  a8b9f8a
- lightningd: bound the negotiated closing fee, not the transaction's fee
  
  ksedgwic
  authored and
  daywalker90
  committed
  b88a0c5
- tests: reproduce a close with a feerange below the estimate floor falling back to the commitment
  
  ksedgwic
  authored and
  daywalker90
  committed
  3da571e
- lightningd: honour the close feerange minimum when accepting a closing fee
  
  ksedgwic
  authored and
  daywalker90
  committed
  27e0858
- tests: reproduce closingd completing a close on a fee lightningd rejected
  
  ksedgwic
  authored and
  daywalker90
  committed
  c2d6f07
- closingd: fail the negotiation when lightningd rejects the peer's closing fee
  
  ksedgwic
  authored and
  daywalker90
  committed
  c7a325e
Commits on Sep 17, 2026