BIP-174: add SLIP-0019 fields #1434

1. 
   louneskmt commented at 7:19 pm on March 16, 2023: none

   The PSBT extension section of the SLIP-0019 has just been clarified and updated in https://github.com/satoshilabs/slips/commit/019bcd62178a086de36523689c2118819053158b.
2. BIP-174: add SLIP-0019 fields b54a711221
3. fiudzy approved
4. fiudzy approved
5. fiudzy approved
6. 
   murchandamus commented at 6:14 pm on May 1, 2024: contributor

   @achow101: could you review this when you have a chance?
7. 
   achow101 commented at 6:26 pm on May 1, 2024: member

   Tend to NACK. IMO every non-proprietary PSBT field should be defined in a BIP. If you don’t want to do that, use a proprietary field. I prefer to be very strict with that as otherwise we open up people to start defining their own fields and someone having to go and hunt down every unBIP’d usage of a field number, which is just an insane maintenance burden. We also want to avoid conflicting field numbers, so requiring everything to be a BIP will actually standardize what each field number means.

   Note that field number 0x19 collides with proposed field numbers in #1540

8. 
   jonatack commented at 6:36 pm on May 1, 2024: contributor

   Closing per BIP author feedback (thanks @achow101).
9. jonatack closed this on May 1, 2024

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Contributors
louneskmt fiudzy murchandamus achow101 jonatack