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instantout: enforce the accepted swap fee

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Carry the accepted quote into each request, persist it, and reject
invoices above that limit. Preserve compatibility for requests that
omit the cap while distinguishing an explicit zero.
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Slyghtning 2026-08-11 11:43:16 +02:00
parent b596eabab3
commit e772f8ccfa
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14 changed files with 260 additions and 12 deletions
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9
loopd/swapclient_server.go
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@ -1763,8 +1763,15 @@ func (s *swapClientServer) InstantOut(ctx context.Context,
reservationIds[i] = resId
}
var options []instantout.NewInstantOutOption
if req.GetMaxSwapFee() != nil {
options = append(options, instantout.WithMaxSwapFee(
btcutil.Amount(req.GetMaxSwapFeeSat()),
))
}
instantOutFsm, err := s.instantOutManager.NewInstantOut(
ctx, reservationIds, req.DestAddr,
ctx, reservationIds, req.DestAddr, options...,
)
if err != nil {
return nil, err