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main.go
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main.go
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//
// Copyright Coinbase, Inc. All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//
//
// Demonstrates 2-party (client-server) DKG and message serialization
//
package main
import (
"encoding/json"
"fmt"
"log"
"os"
"github.com/btcsuite/btcd/btcec"
"github.com/pkg/errors"
crypto "github.com/berry-block/kryptology/pkg/core/curves"
"github.com/berry-block/kryptology/pkg/dkg/gennaro2p"
)
const (
clientSsid = 1
serverSageSsid = 2
useJson = true
)
// Scalar for the curve we're using
var (
curveScalar = crypto.NewK256Scalar()
curve = btcec.S256()
)
// Initiate and run a DKG with JSON-serialized messages
func runClientJson(s *server) {
// Setup
lg := log.New(os.Stdout, "[client] ", log.Lshortfile|log.Lmsgprefix)
lg.Println("Creating client")
client, err := gennaro2p.NewParticipant(clientSsid, serverSageSsid, nil, curveScalar, curve)
dieOnError(err)
// DKG Round 1
lg.Println("Running DKG round 1")
clientR1, err := client.Round1(nil)
dieOnError(err)
lg.Printf("clientR1=%#v", clientR1)
// Marshal
clientR1Json, err := json.Marshal(clientR1)
dieOnError(errors.Wrap(err, "marhsaling clientR1Json"))
// Contact server
lg.Println("Calling server.Phase1")
phase1Json := s.phase1Json(clientR1Json)
// unmarshal
var p1 phase1Response
err = json.Unmarshal(phase1Json, &p1)
dieOnError(errors.Wrap(err, "unmarshaling phase 1 response"))
lg.Printf("phase 1 response=%v", p1)
// DKG Round 2
lg.Println("Running DKG round 2")
clientR2, err := client.Round2(&p1.R1)
dieOnError(err)
lg.Printf("clientR2=%#v", clientR2)
// DKG finalize
lg.Println("Finalize DKG")
result, err := client.Finalize(&p1.R2)
dieOnError(err)
lg.Printf("result=%#v", result)
// Marshal R2 output
clientR2Json, err := json.Marshal(clientR2)
dieOnError(err)
// Contact server
lg.Println("Calling server.Phase2")
s.phase2Json(clientR2Json)
}
// Initiate and run a DKG
func runClient(s *server) {
// Setup
lg := log.New(os.Stdout, "[client] ", log.Lshortfile|log.Lmsgprefix)
lg.Println("Creating client")
client, err := gennaro2p.NewParticipant(clientSsid, serverSageSsid, nil, curveScalar, curve)
dieOnError(err)
// DKG Round 1
lg.Println("Running DKG round 1")
clientR1, err := client.Round1(nil)
dieOnError(err)
lg.Printf("clientR1=%#v", clientR1)
// Contact server
lg.Println("Calling server.Phase1")
serverR1, serverR2 := s.phase1(clientR1)
// DKG Round 2
lg.Println("Running DKG round 2")
clientR2, err := client.Round2(serverR1)
dieOnError(err)
lg.Printf("clientR2=%#v", clientR2)
// DKG finalize
lg.Println("Finalize DKG")
result, err := client.Finalize(serverR2)
dieOnError(err)
lg.Printf("result=%#v", result)
// Contact server
lg.Println("Calling server.Finalize")
s.phase2(clientR2)
}
// Run!
func main() {
if useJson {
runClientJson(&server{})
} else {
runClient(&server{})
}
}
// If there's an error, print and exit(1)
func dieOnError(err error) {
if err != nil {
fmt.Printf("Fatal: %v\n", err)
os.Exit(1)
}
}