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// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package test
import (
"fmt"
"math"
"net"
"time"
"github.com/dexon-foundation/dexon-consensus/common"
"github.com/dexon-foundation/dexon-consensus/core/crypto"
"github.com/dexon-foundation/dexon-consensus/core/crypto/ecdsa"
"github.com/dexon-foundation/dexon-consensus/core/types"
typesDKG "github.com/dexon-foundation/dexon-consensus/core/types/dkg"
"github.com/dexon-foundation/dexon/rlp"
)
func stableRandomHash(block *types.Block) (common.Hash, error) {
if (block.Hash != common.Hash{}) {
return block.Hash, nil
}
return common.NewRandomHash(), nil
}
// GenerateRandomNodeIDs generates randomly a slices of types.NodeID.
func GenerateRandomNodeIDs(nodeCount int) (nIDs types.NodeIDs) {
nIDs = types.NodeIDs{}
for i := 0; i < nodeCount; i++ {
nIDs = append(nIDs, types.NodeID{Hash: common.NewRandomHash()})
}
return
}
// GenerateRandomPrivateKeys generate a set of private keys.
func GenerateRandomPrivateKeys(nodeCount int) (prvKeys []crypto.PrivateKey) {
for i := 0; i < nodeCount; i++ {
prvKey, err := ecdsa.NewPrivateKey()
if err != nil {
panic(err)
}
prvKeys = append(prvKeys, prvKey)
}
return
}
// CalcLatencyStatistics calculates average and deviation from a slice
// of latencies.
func CalcLatencyStatistics(latencies []time.Duration) (avg, dev time.Duration) {
var (
sum float64
sumOfSquareDiff float64
)
// Calculate average.
for _, v := range latencies {
sum += float64(v)
}
avgAsFloat := sum / float64(len(latencies))
avg = time.Duration(avgAsFloat)
// Calculate deviation
for _, v := range latencies {
diff := math.Abs(float64(v) - avgAsFloat)
sumOfSquareDiff += diff * diff
}
dev = time.Duration(math.Sqrt(sumOfSquareDiff / float64(len(latencies)-1)))
return
}
// FindMyIP returns local IP address.
func FindMyIP() (ip string, err error) {
addrs, err := net.InterfaceAddrs()
if err != nil {
return
}
for _, a := range addrs {
ipnet, ok := a.(*net.IPNet)
if !ok {
continue
}
if ipnet.IP.IsLoopback() {
continue
}
if ipnet.IP.To4() != nil {
ip = ipnet.IP.String()
return
}
}
err = fmt.Errorf("unable to find IP")
return
}
// NewKeys creates private keys and corresponding public keys as slice.
func NewKeys(count int) (
prvKeys []crypto.PrivateKey, pubKeys []crypto.PublicKey, err error) {
for i := 0; i < count; i++ {
var prvKey crypto.PrivateKey
if prvKey, err = ecdsa.NewPrivateKey(); err != nil {
return
}
prvKeys = append(prvKeys, prvKey)
pubKeys = append(pubKeys, prvKey.PublicKey())
}
return
}
func cloneDKGComplaint(
comp *typesDKG.Complaint) (copied *typesDKG.Complaint) {
b, err := rlp.EncodeToBytes(comp)
if err != nil {
panic(err)
}
copied = &typesDKG.Complaint{}
if err = rlp.DecodeBytes(b, copied); err != nil {
panic(err)
}
return
}
func cloneDKGMasterPublicKey(mpk *typesDKG.MasterPublicKey) (
copied *typesDKG.MasterPublicKey) {
b, err := rlp.EncodeToBytes(mpk)
if err != nil {
panic(err)
}
copied = typesDKG.NewMasterPublicKey()
if err = rlp.DecodeBytes(b, copied); err != nil {
panic(err)
}
return
}
func cloneDKGFinalize(final *typesDKG.Finalize) (
copied *typesDKG.Finalize) {
b, err := rlp.EncodeToBytes(final)
if err != nil {
panic(err)
}
copied = &typesDKG.Finalize{}
if err = rlp.DecodeBytes(b, copied); err != nil {
panic(err)
}
return
}
func cloneBlockRandomnessResult(rand *types.BlockRandomnessResult) (
copied *types.BlockRandomnessResult) {
b, err := rlp.EncodeToBytes(rand)
if err != nil {
panic(err)
}
copied = &types.BlockRandomnessResult{}
if err = rlp.DecodeBytes(b, copied); err != nil {
panic(err)
}
return
}
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