KarpelesLab / tss-lib / 26283934294

77%

Build Type

push

github

Committed by MagicalTux

Commit Message

Merge frosttss-hd-derivation: non-hardened HD on Ed25519

Adds Option A HD derivation to frosttss: per-key ChainCode set at keygen
(deterministic function of GroupPublicKey), DeriveChild / DeriveAndSign
for non-hardened paths, NewSigningWithTweak that absorbs a tweak into
signer-0's lambda*s mul-add. Existing API is preserved end-to-end —
NewSigning delegates to NewSigningWithTweak(nil), legacy Keys without
ChainCode still pass ValidateBasic, ImportKey populates ChainCode.

Signatures verify under (parent_pub + tweak*G) via any standard Ed25519
verifier. Tests pass under -race.

Coverage Stats

143 of 178 new or added lines in 6 files covered. (80.34%)

2 existing lines in 1 file now uncovered.

16758 of 21854 relevant lines covered (76.68%)

127021.31 hits per line