how to derive eddsa method

[malingzhao]

nc DeriveChildKeyFromHierarchy(indicesHierarchy []uint32, pk *ExtendedKey, mod *big.Int, curve elliptic.Curve) (*big.Int, *ExtendedKey, error) {
var k = pk
var err error
var childKey *ExtendedKey
mod_ := common.ModInt(mod)
ilNum := big.NewInt(0)
for index := range indicesHierarchy {
ilNumOld := ilNum
ilNum, childKey, err = DeriveChildKey(indicesHierarchy[index], k, curve)
if err != nil {
return nil, nil, err
}
k = childKey
ilNum = mod_.Add(ilNum, ilNumOld)
}
return ilNum, k, nil
}

how the eddsa derive

[malingzhao]

and hot adjust the eddsa signing code

[felicityin]

I just submitted a PR, hoping it will be helpful: #299

[malingzhao]

thank you very much

[felicityin]

You need to adjust the public keys like ecdsa does: https://github.com/bnb-chain/tss-lib/blob/master/ecdsa/signing/local_party_test.go#L249

You also need to adjust the private key like ecdsa does: https://github.com/bnb-chain/tss-lib/blob/master/ecdsa/signing/round_1.go#L129