ceremonyclient/nekryptology/pkg/signatures/schnorr/mina/signature.go

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2023-07-05 05:32:28 +00:00
//
// Copyright Coinbase, Inc. All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//
package mina
import (
"fmt"
"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves/native/pasta/fp"
"source.quilibrium.com/quilibrium/monorepo/nekryptology/pkg/core/curves/native/pasta/fq"
)
// Signature is a Mina compatible signature either for payment or delegation
type Signature struct {
R *fp.Fp
S *fq.Fq
}
func (sig Signature) MarshalBinary() ([]byte, error) {
var buf [64]byte
rx := sig.R.Bytes()
s := sig.S.Bytes()
copy(buf[:32], rx[:])
copy(buf[32:], s[:])
return buf[:], nil
}
func (sig *Signature) UnmarshalBinary(input []byte) error {
if len(input) != 64 {
return fmt.Errorf("invalid byte sequence")
}
var buf [32]byte
copy(buf[:], input[:32])
rx, err := new(fp.Fp).SetBytes(&buf)
if err != nil {
return err
}
copy(buf[:], input[32:])
s, err := new(fq.Fq).SetBytes(&buf)
if err != nil {
return err
}
sig.R = rx
sig.S = s
return nil
}