From 185c358e4e0e430df9cd68f85888e8b142786609 Mon Sep 17 00:00:00 2001
From: Wei-Ning Huang <w@dexon.org>
Date: Wed, 24 Oct 2018 16:18:19 +0800
Subject: cmd: add a simple monkey tool for stress test

---
 cmd/monkey/monkey.go | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 test/genesis.json    |  2 +-
 2 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100644 cmd/monkey/monkey.go

diff --git a/cmd/monkey/monkey.go b/cmd/monkey/monkey.go
new file mode 100644
index 000000000..c155e5cf0
--- /dev/null
+++ b/cmd/monkey/monkey.go
@@ -0,0 +1,93 @@
+// Copyright 2018 The dexon-consensus-core Authors
+// This file is part of the dexon-consensus-core library.
+//
+// The dexon-consensus-core 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-core 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-core library. If not, see
+// <http://www.gnu.org/licenses/>.
+
+// A simple monkey that sends random transactions into the network.
+
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"math/big"
+	"math/rand"
+	"time"
+
+	"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://localhost:8545", "JSON RPC endpoint")
+var tps = flag.Int("tps", 10, "transactions per second")
+
+func randomAddress() common.Address {
+	x := common.Address{}
+	for i := 0; i < 20; i++ {
+		x[i] = byte(rand.Int31() % 16)
+	}
+	return x
+}
+
+func main() {
+	flag.Parse()
+
+	privKey, err := crypto.LoadECDSA(*key)
+	if err != nil {
+		panic(err)
+	}
+
+	client, err := ethclient.Dial(*endpoint)
+	if err != nil {
+		panic(err)
+	}
+
+	address := crypto.PubkeyToAddress(privKey.PublicKey)
+
+	nonce, err := client.PendingNonceAt(context.Background(), address)
+	if err != nil {
+		panic(err)
+	}
+
+	for {
+		tx := types.NewTransaction(
+			nonce,
+			randomAddress(),
+			big.NewInt(10),
+			uint64(21000),
+			big.NewInt(1e9),
+			nil)
+
+		signer := types.NewEIP155Signer(big.NewInt(237))
+		tx, err = types.SignTx(tx, signer, privKey)
+		if err != nil {
+			panic(err)
+		}
+
+		err := client.SendTransaction(context.Background(), tx)
+		if err != nil {
+			panic(err)
+		}
+
+		fmt.Println("Sending TX", "fullhash", tx.Hash().String())
+
+		nonce++
+		time.Sleep(time.Duration(float32(time.Second) / float32(*tps)))
+	}
+}
diff --git a/test/genesis.json b/test/genesis.json
index ed5e9b7ce..eefd2d59a 100644
--- a/test/genesis.json
+++ b/test/genesis.json
@@ -1,6 +1,6 @@
 {
   "config": {
-    "chainId": 1,
+    "chainId": 237,
     "homesteadBlock": 0,
     "eip150Block": 0,
     "eip150Hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
-- 
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