// 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/>.
// A simple monkey that sends random transactions into the network.
package main
import (
"context"
"crypto/ecdsa"
"flag"
"fmt"
"math"
"math/big"
"math/rand"
"time"
dexon "github.com/dexon-foundation/dexon"
"github.com/dexon-foundation/dexon/common"
"github.com/dexon-foundation/dexon/core/types"
"github.com/dexon-foundation/dexon/crypto"
"github.com/dexon-foundation/dexon/ethclient"
)
var key = flag.String("key", "", "private key path")
var endpoint = flag.String("endpoint", "http://127.0.0.1:8545", "JSON RPC endpoint")
var n = flag.Int("n", 100, "number of random accounts")
var gambler = flag.Bool("gambler", false, "make this monkey a gambler")
var parallel = flag.Bool("parallel", false, "monkeys will send transaction in parallel")
var sleep = flag.Int("sleep", 500, "time in millisecond that monkeys sleep between each transaction")
type Monkey struct {
client *ethclient.Client
source *ecdsa.PrivateKey
keys []*ecdsa.PrivateKey
networkID *big.Int
}
func New(ep string, source *ecdsa.PrivateKey, num int) *Monkey {
client, err := ethclient.Dial(ep)
if err != nil {
panic(err)
}
var keys []*ecdsa.PrivateKey
for i := 0; i < num; i++ {
key, err := crypto.GenerateKey()
if err != nil {
panic(err)
}
keys = append(keys, key)
}
networkID, err := client.NetworkID(context.Background())
if err != nil {
panic(err)
}
return &Monkey{
client: client,
source: source,
keys: keys,
networkID: networkID,
}
}
func (m *Monkey) transfer(
key *ecdsa.PrivateKey, toAddress common.Address, amount *big.Int, nonce uint64) {
if nonce == math.MaxUint64 {
var err error
address := crypto.PubkeyToAddress(key.PublicKey)
nonce, err = m.client.PendingNonceAt(context.Background(), address)
if err != nil {
panic(err)
}
}
tx := types.NewTransaction(
uint64(nonce),
toAddress,
amount,
uint64(21000),
big.NewInt(1e9),
nil)
signer := types.NewEIP155Signer(m.networkID)
tx, err := types.SignTx(tx, signer, key)
if err != nil {
panic(err)
}
fmt.Println("Sending TX", "fullhash", tx.Hash().String())
err = m.client.SendTransaction(context.Background(), tx)
if err != nil {
panic(err)
}
}
func (m *Monkey) deploy(
key *ecdsa.PrivateKey, code string, ctors []string, amount *big.Int, nonce uint64) common.Address {
if nonce == math.MaxUint64 {
var err error
address := crypto.PubkeyToAddress(key.PublicKey)
nonce, err = m.client.PendingNonceAt(context.Background(), address)
if err != nil {
panic(err)
}
}
var input string
for _, ctor := range ctors {
input += fmt.Sprintf("%064s", ctor)
}
data := common.Hex2Bytes(code + input)
gas, err := m.client.EstimateGas(context.Background(), dexon.CallMsg{
Data: data,
})
if err != nil {
panic(err)
}
tx := types.NewContractCreation(
uint64(nonce),
amount,
gas,
big.NewInt(1e9),
data)
signer := types.NewEIP155Signer(m.networkID)
tx, err = types.SignTx(tx, signer, key)
if err != nil {
panic(err)
}
fmt.Println("Sending TX", "fullhash", tx.Hash().String())
err = m.client.SendTransaction(context.Background(), tx)
if err != nil {
panic(err)
}
for {
time.Sleep(500 * time.Millisecond)
recp, err := m.client.TransactionReceipt(context.Background(), tx.Hash())
if err != nil {
if err == dexon.NotFound {
continue
}
panic(err)
}
return recp.ContractAddress
}
}
func (m *Monkey) call(
key *ecdsa.PrivateKey, contract common.Address, input []byte, amount *big.Int, gas uint64, nonce uint64) {
address := crypto.PubkeyToAddress(key.PublicKey)
if nonce == math.MaxUint64 {
var err error
nonce, err = m.client.PendingNonceAt(context.Background(), address)
if err != nil {
panic(err)
}
}
if gas == uint64(0) {
var err error
gas, err = m.client.EstimateGas(context.Background(), dexon.CallMsg{
From: address,
To: &contract,
Value: amount,
Data: input,
})
if err != nil {
panic(err)
}
}
tx := types.NewTransaction(
uint64(nonce),
contract,
amount,
gas,
big.NewInt(1e9),
input)
signer := types.NewEIP155Signer(m.networkID)
tx, err := types.SignTx(tx, signer, key)
if err != nil {
panic(err)
}
fmt.Println("Sending TX", "fullhash", tx.Hash().String())
err = m.client.SendTransaction(context.Background(), tx)
if err != nil {
panic(err)
}
}
func (m *Monkey) Distribute() {
fmt.Println("Distributing DEX to random accounts ...")
address := crypto.PubkeyToAddress(m.source.PublicKey)
nonce, err := m.client.PendingNonceAt(context.Background(), address)
if err != nil {
panic(err)
}
for _, key := range m.keys {
address := crypto.PubkeyToAddress(key.PublicKey)
amount := new(big.Int)
amount.SetString("1000000000000000000", 10)
m.transfer(m.source, address, amount, nonce)
nonce += 1
}
time.Sleep(20 * time.Second)
}
func (m *Monkey) Crazy() {
fmt.Println("Performing random transfers ...")
nonce := uint64(0)
transfer := func(key *ecdsa.PrivateKey, to common.Address, nonce uint64) {
m.transfer(key, to, big.NewInt(1), nonce)
}
for {
fmt.Println("nonce", nonce)
for _, key := range m.keys {
to := crypto.PubkeyToAddress(m.keys[rand.Int()%len(m.keys)].PublicKey)
if *parallel {
go transfer(key, to, nonce)
} else {
transfer(key, to, nonce)
}
}
nonce += 1
time.Sleep(time.Duration(*sleep) * time.Millisecond)
}
}
func main() {
flag.Parse()
privKey, err := crypto.LoadECDSA(*key)
if err != nil {
panic(err)
}
m := New(*endpoint, privKey, *n)
m.Distribute()
if *gambler {
m.Gamble()
} else {
m.Crazy()
}
}
