KarpelesLab / tss-lib / 23687250081

76%

Build Type

push

github

Committed by MagicalTux

Commit Message

add resharing protocol to ecdsatss and eddsatss

Both packages now support key resharing from an old committee to a
new committee while preserving the same public key.

ecdsatss resharing:
- 5-round protocol with Paillier key generation, DLN/Mod/Fac proofs
- Old committee VSS-shares weighted key shares to new committee
- New committee verifies proofs, computes new key shares
- Integration test: keygen(3,1) → reshare(4,2) → sign → verify

eddsatss resharing:
- 5-round protocol (simpler: no Paillier, Schnorr-based)
- EightInvEight cofactor clearing on polynomial points
- Integration test: keygen(3,1) → reshare(5,2) → sign → verify

Both use the broker/callback architecture with cross-committee
message routing via PartyID key matching.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Run Details

772 of 964 new or added lines in 2 files covered. (80.08%)

6 existing lines in 3 files now uncovered.

9627 of 12664 relevant lines covered (76.02%)

635.97 hits per line