Sats were converted to CCs

[Kruwed]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

I had ~90k reward sats and ~260k CCs. I deposited ~150k CCs, and all of my reward sats got converted. Why?

Screenshots

Steps To Reproduce

See step 1

Expected behavior

Keep my rewards as sats, not ccs

Logs

None

Device information

None

Additional context

Howdy!

[JhoanChala]

I opened PR #3177: #3177

The root cause is that BUY_CREDITS declared REWARD_SATS, and the custodial selector spent users.msats before creating the invoice. The PR makes custodial spending honor the pay-in's declared payment methods, preserves reward sats for credit purchases, adds a regression assertion, and documents the exception. If this direction is accepted, please assign the appropriate difficulty:* label for the contribution award.