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rwadurian/backend/mpc-system/pkg
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hailin 51c0f59924 fix(tss): remove threshold-1 in signing to match keygen exactly 
The signing code was using thresholdT-1 while keygen was using thresholdT,
causing Lagrange coefficient mismatch and "U doesn't equal T" error in round 9.

Root cause: commit d0c504dc added -1 to signing threshold to "match user expectation",
but this broke the keygen/sign consistency that TSS-lib requires.

Changes:
- tss-party/main.go: Sign now uses thresholdT (same as keygen)
- pkg/tss/signing.go: Add logging, emphasize threshold must match keygen
- tss-wasm/main.go: Add comment about threshold consistency

NOTE: This fix maintains backward compatibility with existing wallets.
No wallet regeneration is needed.

ROLLBACK: If this causes issues, revert to commit before this one.
Previous signing threshold was thresholdT-1 (commit d0c504dc).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
 		2025-12-31 12:08:40 -08:00
..
config refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing 2025-12-05 08:11:28 -08:00
crypto refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing 2025-12-05 08:11:28 -08:00
errors refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing 2025-12-05 08:11:28 -08:00
grpcutil feat(mpc-system): integrate reliability mechanisms and enable party-driven architecture 2025-12-05 20:30:03 -08:00
jwt refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing 2025-12-05 08:11:28 -08:00
logger test(logger): set Development=true to test if it affects debug logging 2025-12-06 03:41:50 -08:00
middleware feat(mpc-system): integrate reliability mechanisms and enable party-driven architecture 2025-12-05 20:30:03 -08:00
retry feat(mpc-system): integrate reliability mechanisms and enable party-driven architecture 2025-12-05 20:30:03 -08:00
tss fix(tss): remove threshold-1 in signing to match keygen exactly 2025-12-31 12:08:40 -08:00
utils refactor(mpc-system): migrate to party-driven architecture with PartyID-based routing 2025-12-05 08:11:28 -08:00