71f0a5c1d5
Replace all fmt.Errorf and errors.New in production code with
coreerr.E("Caller.Method", "message", err) from go-log. Replace
os.MkdirAll with coreio.Local.EnsureDir from go-io. Sentinel errors
(consensus/errors.go, wire/varint.go) intentionally kept as errors.New
for errors.Is compatibility.
270 error call sites converted across 38 files. Test files untouched.
crypto/ directory (CGO) untouched.
Co-Authored-By: Virgil <virgil@lethean.io>
60 lines
1.8 KiB
Go
60 lines
1.8 KiB
Go
// Copyright (c) 2017-2026 Lethean (https://lt.hn)
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//
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// Licensed under the European Union Public Licence (EUPL) version 1.2.
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// You may obtain a copy of the licence at:
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//
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// https://joinup.ec.europa.eu/software/page/eupl/licence-eupl
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//
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// SPDX-License-Identifier: EUPL-1.2
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package wallet
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import (
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"forge.lthn.ai/core/go-blockchain/crypto"
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"forge.lthn.ai/core/go-blockchain/types"
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coreerr "forge.lthn.ai/core/go-log"
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)
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// Signer produces signatures for transaction inputs.
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type Signer interface {
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SignInput(prefixHash types.Hash, ephemeral KeyPair,
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ring []types.PublicKey, realIndex int) ([]types.Signature, error)
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Version() uint64
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}
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// NLSAGSigner signs using NLSAG ring signatures (v0/v1 transactions).
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type NLSAGSigner struct{}
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// SignInput generates a ring signature for a single transaction input. It
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// derives the key image from the ephemeral key pair, then produces one
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// signature element per ring member.
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func (s *NLSAGSigner) SignInput(prefixHash types.Hash, ephemeral KeyPair,
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ring []types.PublicKey, realIndex int) ([]types.Signature, error) {
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ki, err := crypto.GenerateKeyImage(
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[32]byte(ephemeral.Public), [32]byte(ephemeral.Secret))
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if err != nil {
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return nil, coreerr.E("NLSAGSigner.SignInput", "wallet: key image", err)
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}
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pubs := make([][32]byte, len(ring))
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for i, k := range ring {
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pubs[i] = [32]byte(k)
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}
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rawSigs, err := crypto.GenerateRingSignature(
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[32]byte(prefixHash), ki, pubs,
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[32]byte(ephemeral.Secret), realIndex)
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if err != nil {
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return nil, coreerr.E("NLSAGSigner.SignInput", "wallet: ring signature", err)
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}
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sigs := make([]types.Signature, len(rawSigs))
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for i, rs := range rawSigs {
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sigs[i] = types.Signature(rs)
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}
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return sigs, nil
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}
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// Version returns the transaction version this signer targets.
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func (s *NLSAGSigner) Version() uint64 { return 1 }
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