BIP-375: correct labeled test vectors to include labeled-spend key in PSBT_OUT_SP_V0_INFO #2207

pull macgyver13 wants to merge 2 commits into bitcoin:master from macgyver13:bip375-labeled-spend changing 3 files +38 −25

macgyver13 commented at 3:46 PM on July 7, 2026: contributor
Includes two changes to align the labeled test vectors and validation reference with BIP-375:
- Sort silent payment codes lexicographically then by output index before assigning k values.
- PSBT_OUT_SP_V0_INFO should carry the labeled-spend public key, not the base-spend public key.
Changed vectors:
- can finalize: one P2WPKH input / two mixed outputs - labeled sp output and BIP 32 change
- can finalize: one input / two sp outputs - output 0 has no label / output 1 uses label=0 convention for sp change
- can finalize: three sp outputs (same scan key) - output 0 uses label=1, outputs 1 and 2 uses label=2 (same spend key)
Test Runner Output
```
Summary: 41 passed, 0 failed
```

BIP-375: update labeled test vectors

Now PSBT_OUT_SP_V0_INFO provides labeled-spend public key not the base-spend
public key.

Modify test vector with labeled-spend key to the same recipient from:
two sp outputs - output 0 uses label=3 / output 1 uses label=1
to:
three sp outputs (same scan key) - output 0 uses label=1, outputs 1 and 2 uses label=2 (same spend key)
This vector excercises the BIP375 sorting outputs with same scan key properly.

The next commit will fix the validation logic and address this failing test.

bump ChangeLog to 0.1.2

5225829fe3

BIP-375: update validation to match sorting outputs with same scan key

Fix output script validation for silent payment output ordering when multiple 
outputs share the same scan key (labeled addresses of one recipient).

8f7b632f67

macgyver13 marked this as ready for review on Jul 7, 2026
murchandamus commented at 11:00 PM on July 7, 2026: member

cc BIP Owners for review: @andrewtoth, @achow101, @josibake
murchandamus added the label Proposed BIP modification on Jul 7, 2026
murchandamus added the label Pending acceptance on Jul 7, 2026

Contributors

macgyver13

murchandamus

Labels

Proposed BIP modification Pending acceptance