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package utils
import (
"errors"
"math/big"
snark "github.com/arnaucube/go-snark"
"github.com/arnaucube/go-snark/circuitcompiler"
"github.com/arnaucube/go-snark/groth16"
)
// []*big.Int
func ArrayBigIntToString(b []*big.Int) []string {
var o []string
for i := 0; i < len(b); i++ {
o = append(o, b[i].String())
}
return o
}
func ArrayStringToBigInt(s []string) ([]*big.Int, error) {
var px []*big.Int
for i := 0; i < len(s); i++ {
param, ok := new(big.Int).SetString(s[i], 10)
if !ok {
return nil, errors.New("error parsing px from pxString")
}
px = append(px, param)
}
return px, nil
}
// [3]*big.Int
func String3ToBigInt(s [3]string) ([3]*big.Int, error) {
var o [3]*big.Int
for i := 0; i < len(s); i++ {
param, ok := new(big.Int).SetString(s[i], 10)
if !ok {
return o, errors.New("error parsing [3]*big.Int from [3]string")
}
o[i] = param
}
return o, nil
}
func BigInt3ToString(b [3]*big.Int) [3]string {
var o [3]string
o[0] = b[0].String()
o[1] = b[1].String()
o[2] = b[2].String()
return o
}
// [][3]*big.Int
func Array3StringToBigInt(s [][3]string) ([][3]*big.Int, error) {
var o [][3]*big.Int
for i := 0; i < len(s); i++ {
parsed, err := String3ToBigInt(s[i])
if err != nil {
return o, err
}
o = append(o, parsed)
}
return o, nil
}
func Array3BigIntToString(b [][3]*big.Int) [][3]string {
var o [][3]string
for i := 0; i < len(b); i++ {
o = append(o, BigInt3ToString(b[i]))
}
return o
}
func String2ToBigInt(s [2]string) ([2]*big.Int, error) {
var o [2]*big.Int
for i := 0; i < len(s); i++ {
param, ok := new(big.Int).SetString(s[i], 10)
if !ok {
return o, errors.New("error parsing [2]*big.Int from [2]string")
}
o[i] = param
}
return o, nil
}
// [3][2]*big.Int
func String32ToBigInt(s [3][2]string) ([3][2]*big.Int, error) {
var o [3][2]*big.Int
var err error
o[0], err = String2ToBigInt(s[0])
if err != nil {
return o, err
}
o[1], err = String2ToBigInt(s[1])
if err != nil {
return o, err
}
o[2], err = String2ToBigInt(s[2])
if err != nil {
return o, err
}
return o, nil
}
func BigInt32ToString(b [3][2]*big.Int) [3][2]string {
var o [3][2]string
o[0][0] = b[0][0].String()
o[0][1] = b[0][1].String()
o[1][0] = b[1][0].String()
o[1][1] = b[1][1].String()
o[2][0] = b[2][0].String()
o[2][1] = b[2][1].String()
return o
}
// [][3][2]*big.Int
func Array32StringToBigInt(s [][3][2]string) ([][3][2]*big.Int, error) {
var o [][3][2]*big.Int
for i := 0; i < len(s); i++ {
parsed, err := String32ToBigInt(s[i])
if err != nil {
return o, err
}
o = append(o, parsed)
}
return o, nil
}
func Array32BigIntToString(b [][3][2]*big.Int) [][3][2]string {
var o [][3][2]string
for i := 0; i < len(b); i++ {
o = append(o, BigInt32ToString(b[i]))
}
return o
}
// Setup
type SetupString struct {
// public
G1T [][3]string
G2T [][3][2]string
Pk struct {
A [][3]string
B [][3][2]string
C [][3]string
Kp [][3]string
Ap [][3]string
Bp [][3]string
Cp [][3]string
Z []string
}
Vk struct {
Vka [3][2]string
Vkb [3]string
Vkc [3][2]string
IC [][3]string
G1Kbg [3]string
G2Kbg [3][2]string
G2Kg [3][2]string
Vkz [3][2]string
}
}
func SetupToString(setup snark.Setup) SetupString {
var s SetupString
s.G1T = Array3BigIntToString(setup.G1T)
s.G2T = Array32BigIntToString(setup.G2T)
s.Pk.A = Array3BigIntToString(setup.Pk.A)
s.Pk.B = Array32BigIntToString(setup.Pk.B)
s.Pk.C = Array3BigIntToString(setup.Pk.C)
s.Pk.Kp = Array3BigIntToString(setup.Pk.Kp)
s.Pk.Ap = Array3BigIntToString(setup.Pk.Ap)
s.Pk.Bp = Array3BigIntToString(setup.Pk.Bp)
s.Pk.Cp = Array3BigIntToString(setup.Pk.Cp)
s.Pk.Z = ArrayBigIntToString(setup.Pk.Z)
s.Vk.Vka = BigInt32ToString(setup.Vk.Vka)
s.Vk.Vkb = BigInt3ToString(setup.Vk.Vkb)
s.Vk.Vkc = BigInt32ToString(setup.Vk.Vkc)
s.Vk.IC = Array3BigIntToString(setup.Vk.IC)
s.Vk.G1Kbg = BigInt3ToString(setup.Vk.G1Kbg)
s.Vk.G2Kbg = BigInt32ToString(setup.Vk.G2Kbg)
s.Vk.G2Kg = BigInt32ToString(setup.Vk.G2Kg)
s.Vk.Vkz = BigInt32ToString(setup.Vk.Vkz)
return s
}
func SetupFromString(s SetupString) (snark.Setup, error) {
var o snark.Setup
var err error
o.G1T, err = Array3StringToBigInt(s.G1T)
if err != nil {
return o, err
}
o.G2T, err = Array32StringToBigInt(s.G2T)
if err != nil {
return o, err
}
o.Pk.A, err = Array3StringToBigInt(s.Pk.A)
if err != nil {
return o, err
}
o.Pk.B, err = Array32StringToBigInt(s.Pk.B)
if err != nil {
return o, err
}
o.Pk.C, err = Array3StringToBigInt(s.Pk.C)
if err != nil {
return o, err
}
o.Pk.Kp, err = Array3StringToBigInt(s.Pk.Kp)
if err != nil {
return o, err
}
o.Pk.Ap, err = Array3StringToBigInt(s.Pk.Ap)
if err != nil {
return o, err
}
o.Pk.Bp, err = Array3StringToBigInt(s.Pk.Bp)
if err != nil {
return o, err
}
o.Pk.Cp, err = Array3StringToBigInt(s.Pk.Cp)
if err != nil {
return o, err
}
o.Pk.Z, err = ArrayStringToBigInt(s.Pk.Z)
if err != nil {
return o, err
}
o.Vk.Vka, err = String32ToBigInt(s.Vk.Vka)
if err != nil {
return o, err
}
o.Vk.Vkb, err = String3ToBigInt(s.Vk.Vkb)
if err != nil {
return o, err
}
o.Vk.Vkc, err = String32ToBigInt(s.Vk.Vkc)
if err != nil {
return o, err
}
o.Vk.IC, err = Array3StringToBigInt(s.Vk.IC)
if err != nil {
return o, err
}
o.Vk.G1Kbg, err = String3ToBigInt(s.Vk.G1Kbg)
if err != nil {
return o, err
}
o.Vk.G2Kbg, err = String32ToBigInt(s.Vk.G2Kbg)
if err != nil {
return o, err
}
o.Vk.G2Kg, err = String32ToBigInt(s.Vk.G2Kg)
if err != nil {
return o, err
}
o.Vk.Vkz, err = String32ToBigInt(s.Vk.Vkz)
if err != nil {
return o, err
}
return o, nil
}
// circuit
type CircuitString struct {
NVars int
NPublic int
NSignals int
PrivateInputs []string
PublicInputs []string
Signals []string
Witness []string
Constraints []circuitcompiler.Constraint
R1CS struct {
A [][]string
B [][]string
C [][]string
}
}
func ArrayArrayBigIntToString(b [][]*big.Int) [][]string {
var o [][]string
for i := 0; i < len(b); i++ {
o = append(o, ArrayBigIntToString(b[i]))
}
return o
}
func ArrayArrayStringToBigInt(s [][]string) ([][]*big.Int, error) {
var o [][]*big.Int
for i := 0; i < len(s); i++ {
parsed, err := ArrayStringToBigInt(s[i])
if err != nil {
return o, err
}
o = append(o, parsed)
}
return o, nil
}
func CircuitToString(c circuitcompiler.Circuit) CircuitString {
var cs CircuitString
cs.NVars = c.NVars
cs.NPublic = c.NPublic
cs.NSignals = c.NSignals
cs.PrivateInputs = c.PrivateInputs
cs.PublicInputs = c.PublicInputs
cs.Signals = c.Signals
cs.Witness = ArrayBigIntToString(c.Witness)
cs.Constraints = c.Constraints
cs.R1CS.A = ArrayArrayBigIntToString(c.R1CS.A)
cs.R1CS.B = ArrayArrayBigIntToString(c.R1CS.B)
cs.R1CS.C = ArrayArrayBigIntToString(c.R1CS.C)
return cs
}
func CircuitFromString(cs CircuitString) (circuitcompiler.Circuit, error) {
var c circuitcompiler.Circuit
var err error
c.NVars = cs.NVars
c.NPublic = cs.NPublic
c.NSignals = cs.NSignals
c.PrivateInputs = cs.PrivateInputs
c.PublicInputs = cs.PublicInputs
c.Signals = cs.Signals
c.Witness, err = ArrayStringToBigInt(cs.Witness)
if err != nil {
return c, err
}
c.Constraints = cs.Constraints
c.R1CS.A, err = ArrayArrayStringToBigInt(cs.R1CS.A)
if err != nil {
return c, err
}
c.R1CS.B, err = ArrayArrayStringToBigInt(cs.R1CS.B)
if err != nil {
return c, err
}
c.R1CS.C, err = ArrayArrayStringToBigInt(cs.R1CS.C)
if err != nil {
return c, err
}
return c, nil
}
// Proof
type ProofString struct {
PiA [3]string
PiAp [3]string
PiB [3][2]string
PiBp [3]string
PiC [3]string
PiCp [3]string
PiH [3]string
PiKp [3]string
}
func ProofToString(p snark.Proof) ProofString {
var s ProofString
s.PiA = BigInt3ToString(p.PiA)
s.PiAp = BigInt3ToString(p.PiAp)
s.PiB = BigInt32ToString(p.PiB)
s.PiBp = BigInt3ToString(p.PiBp)
s.PiC = BigInt3ToString(p.PiC)
s.PiCp = BigInt3ToString(p.PiCp)
s.PiH = BigInt3ToString(p.PiH)
s.PiKp = BigInt3ToString(p.PiKp)
return s
}
func ProofFromString(s ProofString) (snark.Proof, error) {
var p snark.Proof
var err error
p.PiA, err = String3ToBigInt(s.PiA)
if err != nil {
return p, err
}
p.PiAp, err = String3ToBigInt(s.PiAp)
if err != nil {
return p, err
}
p.PiB, err = String32ToBigInt(s.PiB)
if err != nil {
return p, err
}
p.PiBp, err = String3ToBigInt(s.PiBp)
if err != nil {
return p, err
}
p.PiC, err = String3ToBigInt(s.PiC)
if err != nil {
return p, err
}
p.PiCp, err = String3ToBigInt(s.PiCp)
if err != nil {
return p, err
}
p.PiH, err = String3ToBigInt(s.PiH)
if err != nil {
return p, err
}
p.PiKp, err = String3ToBigInt(s.PiKp)
if err != nil {
return p, err
}
return p, nil
}
// groth
type GrothSetupString struct {
Pk struct { // Proving Key
BACDelta [][3]string
Z []string
G1 struct {
Alpha [3]string
Beta [3]string
Delta [3]string
At [][3]string
BACGamma [][3]string
}
G2 struct {
Beta [3][2]string
Gamma [3][2]string
Delta [3][2]string
BACGamma [][3][2]string
}
PowersTauDelta [][3]string
}
Vk struct {
IC [][3]string
G1 struct {
Alpha [3]string
}
G2 struct {
Beta [3][2]string
Gamma [3][2]string
Delta [3][2]string
}
}
}
func GrothSetupToString(setup groth16.Setup) GrothSetupString {
var s GrothSetupString
s.Pk.BACDelta = Array3BigIntToString(setup.Pk.BACDelta)
s.Pk.Z = ArrayBigIntToString(setup.Pk.Z)
s.Pk.G1.Alpha = BigInt3ToString(setup.Pk.G1.Alpha)
s.Pk.G1.Beta = BigInt3ToString(setup.Pk.G1.Beta)
s.Pk.G1.Delta = BigInt3ToString(setup.Pk.G1.Delta)
s.Pk.G1.At = Array3BigIntToString(setup.Pk.G1.At)
s.Pk.G1.BACGamma = Array3BigIntToString(setup.Pk.G1.BACGamma)
s.Pk.G2.Beta = BigInt32ToString(setup.Pk.G2.Beta)
s.Pk.G2.Gamma = BigInt32ToString(setup.Pk.G2.Gamma)
s.Pk.G2.Delta = BigInt32ToString(setup.Pk.G2.Delta)
s.Pk.G2.BACGamma = Array32BigIntToString(setup.Pk.G2.BACGamma)
s.Pk.PowersTauDelta = Array3BigIntToString(setup.Pk.PowersTauDelta)
s.Vk.IC = Array3BigIntToString(setup.Vk.IC)
s.Vk.G1.Alpha = BigInt3ToString(setup.Vk.G1.Alpha)
s.Vk.G2.Beta = BigInt32ToString(setup.Vk.G2.Beta)
s.Vk.G2.Gamma = BigInt32ToString(setup.Vk.G2.Gamma)
s.Vk.G2.Delta = BigInt32ToString(setup.Vk.G2.Delta)
return s
}
func GrothSetupFromString(s GrothSetupString) (groth16.Setup, error) {
var o groth16.Setup
var err error
o.Pk.BACDelta, err = Array3StringToBigInt(s.Pk.BACDelta)
if err != nil {
return o, err
}
o.Pk.Z, err = ArrayStringToBigInt(s.Pk.Z)
if err != nil {
return o, err
}
o.Pk.G1.Alpha, err = String3ToBigInt(s.Pk.G1.Alpha)
if err != nil {
return o, err
}
o.Pk.G1.Beta, err = String3ToBigInt(s.Pk.G1.Beta)
if err != nil {
return o, err
}
o.Pk.G1.Delta, err = String3ToBigInt(s.Pk.G1.Delta)
if err != nil {
return o, err
}
o.Pk.G1.At, err = Array3StringToBigInt(s.Pk.G1.At)
if err != nil {
return o, err
}
o.Pk.G1.BACGamma, err = Array3StringToBigInt(s.Pk.G1.BACGamma)
if err != nil {
return o, err
}
o.Pk.G2.Beta, err = String32ToBigInt(s.Pk.G2.Beta)
if err != nil {
return o, err
}
o.Pk.G2.Gamma, err = String32ToBigInt(s.Pk.G2.Gamma)
if err != nil {
return o, err
}
o.Pk.G2.Delta, err = String32ToBigInt(s.Pk.G2.Delta)
if err != nil {
return o, err
}
o.Pk.G2.BACGamma, err = Array32StringToBigInt(s.Pk.G2.BACGamma)
if err != nil {
return o, err
}
o.Pk.PowersTauDelta, err = Array3StringToBigInt(s.Pk.PowersTauDelta)
if err != nil {
return o, err
}
o.Vk.IC, err = Array3StringToBigInt(s.Vk.IC)
if err != nil {
return o, err
}
o.Vk.G1.Alpha, err = String3ToBigInt(s.Vk.G1.Alpha)
if err != nil {
return o, err
}
o.Vk.G2.Beta, err = String32ToBigInt(s.Vk.G2.Beta)
if err != nil {
return o, err
}
o.Vk.G2.Gamma, err = String32ToBigInt(s.Vk.G2.Gamma)
if err != nil {
return o, err
}
o.Vk.G2.Delta, err = String32ToBigInt(s.Vk.G2.Delta)
if err != nil {
return o, err
}
return o, nil
}
type GrothProofString struct {
PiA [3]string
PiB [3][2]string
PiC [3]string
}
func GrothProofToString(p groth16.Proof) GrothProofString {
var s GrothProofString
s.PiA = BigInt3ToString(p.PiA)
s.PiB = BigInt32ToString(p.PiB)
s.PiC = BigInt3ToString(p.PiC)
return s
}
func GrothProofFromString(s GrothProofString) (groth16.Proof, error) {
var p groth16.Proof
var err error
p.PiA, err = String3ToBigInt(s.PiA)
if err != nil {
return p, err
}
p.PiB, err = String32ToBigInt(s.PiB)
if err != nil {
return p, err
}
p.PiC, err = String3ToBigInt(s.PiC)
if err != nil {
return p, err
}
return p, nil
}