mirror of
https://github.com/luxfi/utxo.git
synced 2026-10-30 15:13:57 +00:00
zeekay
ae673e7656
Adds four new Fx (feature-extension) packages for X-Chain UTXO signing schemes beyond secp256k1: - ed25519fx — Ed25519 (EdDSA on Curve25519) - schnorrfx — Schnorr (classical) - secp256r1fx — P-256 / NIST - slhdsafx — SLH-DSA (FIPS 205 hash-based PQ) Plus mldsafx updates to match (ML-DSA / FIPS 204 lattice PQ). Each fx package exports Fx, Credential, Keychain, OutputOwners, Input following the existing secp256k1fx pattern. Gitignore .DS_Store.
46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
// Copyright (C) 2019-2025, Lux Industries, Inc. All rights reserved.
|
|
// See the file LICENSE for licensing terms.
|
|
|
|
package slhdsafx
|
|
|
|
import (
|
|
"errors"
|
|
|
|
"github.com/luxfi/math"
|
|
"github.com/luxfi/utils"
|
|
)
|
|
|
|
const (
|
|
// CostPerSignature is the compute cost per SLH-DSA signature verification.
|
|
// Benchmarked at ~862us vs secp256k1 ~40us (21.5x ratio).
|
|
// secp256k1 CostPerSignature = 1000, so SLH-DSA = 22000.
|
|
CostPerSignature uint64 = 22000
|
|
)
|
|
|
|
var (
|
|
ErrNilInput = errors.New("nil input")
|
|
ErrInputIndicesNotSortedUnique = errors.New("address indices not sorted and unique")
|
|
)
|
|
|
|
// Input references signature indices into the credential for spending.
|
|
type Input struct {
|
|
SigIndices []uint32 `serialize:"true" json:"signatureIndices"`
|
|
}
|
|
|
|
func (in *Input) Cost() (uint64, error) {
|
|
numSigs := uint64(len(in.SigIndices))
|
|
return math.Mul64(numSigs, CostPerSignature)
|
|
}
|
|
|
|
// Verify this input is syntactically valid
|
|
func (in *Input) Verify() error {
|
|
switch {
|
|
case in == nil:
|
|
return ErrNilInput
|
|
case !utils.IsSortedAndUniqueOrdered(in.SigIndices):
|
|
return ErrInputIndicesNotSortedUnique
|
|
default:
|
|
return nil
|
|
}
|
|
}
|