forked from Consensys/gnark-crypto
/
curve.go
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/
curve.go
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// Copyright 2020 ConsenSys Software Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Code generated by consensys/gnark-crypto DO NOT EDIT
package twistededwards
import (
"math/big"
"sync"
"github.com/consensys/gnark-crypto/ecc/bls12-378/fr"
)
// CurveParams curve parameters: ax^2 + y^2 = 1 + d*x^2*y^2
type CurveParams struct {
A, D fr.Element
Cofactor fr.Element
Order big.Int
Base PointAffine
}
// GetEdwardsCurve returns the twisted Edwards curve on bls12-378/Fr
func GetEdwardsCurve() CurveParams {
initOnce.Do(initCurveParams)
// copy to keep Order private
var res CurveParams
res.A.Set(&curveParams.A)
res.D.Set(&curveParams.D)
res.Cofactor.Set(&curveParams.Cofactor)
res.Order.Set(&curveParams.Order)
res.Base.Set(&curveParams.Base)
return res
}
var (
initOnce sync.Once
curveParams CurveParams
)
func initCurveParams() {
curveParams.A.SetString("16249")
curveParams.D.SetString("826857503717340716663906603396009292766308904506333520048618402505612607353")
curveParams.Cofactor.SetString("8")
curveParams.Order.SetString("1860429383364016612493789857641020908721690454530426945748883177201355593303", 10)
curveParams.Base.X.SetString("6772953896463446981848394912418300623023000177913479948380771331313783560843")
curveParams.Base.Y.SetString("9922290044608088599966879240752111513195706854076002240583420830067351093249")
}
// mulByA multiplies fr.Element by curveParams.A
func mulByA(x *fr.Element) {
x.Mul(x, &curveParams.A)
}