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zeekayandHanzo Dev
67da44a1f3
github.com/luxfi/utils is now github.com/luxfi/util. Import paths and the module requirement follow the rename; the old module stays as an indirect requirement that published dependencies still pull in. Co-authored-by: Hanzo Dev <[email protected]>
46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
// Copyright (C) 2019-2025, Lux Industries, Inc. All rights reserved.
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// See the file LICENSE for licensing terms.
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package ed25519fx
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import (
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"errors"
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"github.com/luxfi/math"
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"github.com/luxfi/util"
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)
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const (
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// CostPerSignature is the compute cost per Ed25519 signature verification.
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// Benchmarked at ~50us vs secp256k1 ~40us (1.3x ratio).
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// secp256k1 CostPerSignature = 1000, so Ed25519 = 1000.
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CostPerSignature uint64 = 1000
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)
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var (
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ErrNilInput = errors.New("nil input")
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ErrInputIndicesNotSortedUnique = errors.New("address indices not sorted and unique")
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)
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// Input references signature indices into the credential for spending.
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type Input struct {
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SigIndices []uint32 `serialize:"true" json:"signatureIndices"`
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}
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func (in *Input) Cost() (uint64, error) {
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numSigs := uint64(len(in.SigIndices))
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return math.Mul(numSigs, CostPerSignature)
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}
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// Verify this input is syntactically valid
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func (in *Input) Verify() error {
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switch {
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case in == nil:
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return ErrNilInput
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case !utils.IsSortedAndUniqueOrdered(in.SigIndices):
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return ErrInputIndicesNotSortedUnique
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default:
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return nil
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}
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}
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