package kzgceremony
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import (
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"encoding/hex"
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"strings"
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bls12381 "github.com/kilic/bls12-381"
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)
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// WIP
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// ParseEthJSON parses the eth-kzg-ceremony SRS json format
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func ParseEthJSON(g1sStr, g2sStr []string) (*SRS, error) {
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g1 := bls12381.NewG1()
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g2 := bls12381.NewG2()
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nG1s := len(g1sStr)
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nG2s := len(g2sStr)
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g1s := make([]*bls12381.PointG1, nG1s)
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g2s := make([]*bls12381.PointG2, nG2s)
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for i := 0; i < nG1s; i++ {
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g1sBytes, err := hex.DecodeString(strings.TrimPrefix(g1sStr[i], "0x"))
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if err != nil {
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return nil, err
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}
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g1s_i, err := g1.FromCompressed(g1sBytes)
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if err != nil {
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return nil, err
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}
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g1s[i] = g1s_i
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}
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for i := 0; i < nG2s; i++ {
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g2sBytes, err := hex.DecodeString(strings.TrimPrefix(g2sStr[i], "0x"))
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if err != nil {
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return nil, err
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}
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g2s_i, err := g2.FromCompressed(g2sBytes)
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if err != nil {
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return nil, err
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}
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g2s[i] = g2s_i
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}
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return &SRS{G1s: g1s, G2s: g2s}, nil
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}
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// ToEthJSON outputs the SRS into the eth-kzg-ceremony SRS json format
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func (srs *SRS) ToEthJSON() ([]string, []string, error) {
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g1 := bls12381.NewG1()
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g2 := bls12381.NewG2()
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nG1s := len(srs.G1s)
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nG2s := len(srs.G2s)
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g1s := make([]string, nG1s)
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g2s := make([]string, nG2s)
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for i := 0; i < nG1s; i++ {
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g1s[i] = "0x" + hex.EncodeToString(g1.ToCompressed(srs.G1s[i]))
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}
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for i := 0; i < nG2s; i++ {
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g2s[i] = "0x" + hex.EncodeToString(g2.ToCompressed(srs.G2s[i]))
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}
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return g1s, g2s, nil
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}
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