Polishing & documenting, add compile script

README.md

@@ -35,6 +35,6 @@ Usage of ./kzgceremony:
 
 So for example, run your contribution with:
 ```
-./kzgceremony -r "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod"
+./kzgceremony -r 1111111111111111111111111111111111111111111111111111111111111111
 ```
-(where the "Lorem ipsum..." is your source of randomness)
+(where the 111...111 is your source of randomness)

cmd/cmd.go

@@ -17,8 +17,7 @@ import (
 
 func main() {
 	fmt.Println("eth-kzg-ceremony-alt")
-	fmt.Printf("====================\n")
-	fmt.Printf("            https://github.com/arnaucube/eth-kzg-ceremony-alt\n\n")
+	fmt.Printf("====================\n\n")
 
 	redB := color.New(color.FgRed, color.Bold)
 	cyan := color.New(color.FgCyan)
@@ -30,7 +29,7 @@ func main() {
 	var randomness string
 	var sleepTime uint64
 	flag.StringVarP(&sequencerURL, "url", "u",
-		"https://sequencer.ceremony.ethereum.org", "sequencer url")
+		"https://kzg-ceremony-sequencer-dev.fly.dev", "sequencer url")
 	flag.StringVarP(&randomness, "rand", "r",
 		"", fmt.Sprintf("randomness, needs to be bigger than %d", kzgceremony.MinRandomnessLen))
 	flag.Uint64VarP(&sleepTime, "sleeptime", "s",

go.mod

@@ -7,7 +7,6 @@ require (
 	github.com/frankban/quicktest v1.14.4
 	github.com/kilic/bls12-381 v0.1.0
 	github.com/spf13/pflag v1.0.5
-	golang.org/x/crypto v0.4.0
 )
 
 require (
@@ -17,5 +16,5 @@ require (
 	github.com/mattn/go-colorable v0.1.12 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
 	github.com/rogpeppe/go-internal v1.9.0 // indirect
-	golang.org/x/sys v0.3.0 // indirect
+	golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a // indirect
 )

go.sum

@@ -22,12 +22,10 @@ github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZV
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
-golang.org/x/crypto v0.4.0 h1:UVQgzMY87xqpKNgb+kDsll2Igd33HszWHFLmpaRMq/8=
-golang.org/x/crypto v0.4.0/go.mod h1:3quD/ATkf6oY+rnes5c3ExXTbLc8mueNue5/DoinL80=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201101102859-da207088b7d1/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.3.0 h1:w8ZOecv6NaNa/zC8944JTU3vz4u6Lagfk4RPQxv92NQ=
-golang.org/x/sys v0.3.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a h1:dGzPydgVsqGcTRVwiLJ1jVbufYwmzD3LfVPLKsKg+0k=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

powersoftau.go

@@ -4,8 +4,6 @@ import (
 	"fmt"
 	"math/big"
 
-	"golang.org/x/crypto/blake2b"
-
 	bls12381 "github.com/kilic/bls12-381"
 )
 
@@ -83,7 +81,7 @@ func (cs *State) Contribute(randomness []byte) (*State, error) {
 		ns.Transcripts[i].NumG1Powers = cs.Transcripts[i].NumG1Powers
 		ns.Transcripts[i].NumG2Powers = cs.Transcripts[i].NumG2Powers
 
-		newSRS, proof, err := Contribute(cs.Transcripts[i].PowersOfTau, i, randomness)
+		newSRS, proof, err := Contribute(cs.Transcripts[i].PowersOfTau, randomness)
 		if err != nil {
 			return nil, err
 		}
@@ -111,7 +109,7 @@ func (pb *BatchContribution) Contribute(randomness []byte) (*BatchContribution,
 		nb.Contributions[i].NumG1Powers = pb.Contributions[i].NumG1Powers
 		nb.Contributions[i].NumG2Powers = pb.Contributions[i].NumG2Powers
 
-		newSRS, proof, err := Contribute(pb.Contributions[i].PowersOfTau, i, randomness)
+		newSRS, proof, err := Contribute(pb.Contributions[i].PowersOfTau, randomness)
 		if err != nil {
 			return nil, err
 		}
@@ -137,10 +135,9 @@ func newEmptySRS(nG1, nG2 int) *SRS {
 	return &SRS{g1s, g2s}
 }
 
-func tau(round int, randomness []byte) *toxicWaste {
-	val := blake2b.Sum256(randomness)
+func tau(randomness []byte) *toxicWaste {
 	tau := new(big.Int).Mod(
-		new(big.Int).SetBytes(val[:]),
+		new(big.Int).SetBytes(randomness),
 		g2.Q())
 	tau_Fr := bls12381.NewFr().FromBytes(tau.Bytes())
 	TauG2 := g2.New()
@@ -179,12 +176,12 @@ func genProof(toxicWaste *toxicWaste, prevSRS, newSRS *SRS) *Proof {
 
 // Contribute takes as input the previous SRS and a random
 // byte slice, and returns the new SRS together with the Proof
-func Contribute(prevSRS *SRS, round int, randomness []byte) (*SRS, *Proof, error) {
+func Contribute(prevSRS *SRS, randomness []byte) (*SRS, *Proof, error) {
 	if len(randomness) < MinRandomnessLen {
 		return nil, nil, fmt.Errorf("err randomness") // WIP
 	}
 	// set tau from randomness
-	tw := tau(round, randomness)
+	tw := tau(randomness)
 
 	newSRS := computeContribution(tw, prevSRS)
 

powersoftau_test.go

@@ -13,13 +13,13 @@ func TestContribution(t *testing.T) {
 
 	srs_0 := newEmptySRS(10, 10)
 
-	srs_1, proof_1, err := Contribute(srs_0, 0,
+	srs_1, proof_1, err := Contribute(srs_0,
 		[]byte("1111111111111111111111111111111111111111111111111111111111111111"))
 	c.Assert(err, qt.IsNil)
 
 	c.Assert(Verify(srs_0, srs_1, proof_1), qt.IsTrue)
 
-	srs_2, proof_2, err := Contribute(srs_1, 0,
+	srs_2, proof_2, err := Contribute(srs_1,
 		[]byte("2222222222222222222222222222222222222222222222222222222222222222"))
 	c.Assert(err, qt.IsNil)
 	c.Assert(Verify(srs_1, srs_2, proof_2), qt.IsTrue)