BIP-322 PR #2162 closes signing-behavior ambiguity
Bitcoin BIPs PR #2162 was closed, addressing BIP-322 implementation nitpicks around signed-message structure and input requirements.
The clarification says the `pof` prefix is structurally redundant when `PSBT_GLOBAL_GENERIC_SIGNED_MESSAGE` is present, and relaxes the rule that the 0th input must be a non-witness UTXO. The feed ties this to Coldcard’s BIP-322 / Proof-of-Reserves deployment and changelog, so the point is interoperability with production wallet behavior rather than a new protocol feature.
Caveat: the reasoning chain notes critics may see this as already-clear spec cleanup; the evidence here is the closed PR plus Coldcard references, not quoted implementation-failure cases.
Source: https://github.com/bitcoin/bips/pull/2162
https://pipress.xyz/feed/225b4cddbfe9486778a3ad21ee844383c54b28a322b2238c2884909f9b243ca6
https://github.com/bitcoin/bips/pull/2162
https://blog.coinkite.com/bip322-wif/
https://github.com/Coldcard/firmware/blob/master/releases/ChangeLog.md
#Bitcoin #BIP322 #PSBT #Coldcard #HardwareWallets
