github.com/oskarth/go-ethereum@v1.6.8-0.20191013093314-dac24a9d3494/miner/stress_ethash.go (about) 1 // Copyright 2018 The go-ethereum Authors 2 // This file is part of the go-ethereum library. 3 // 4 // The go-ethereum library is free software: you can redistribute it and/or modify 5 // it under the terms of the GNU Lesser General Public License as published by 6 // the Free Software Foundation, either version 3 of the License, or 7 // (at your option) any later version. 8 // 9 // The go-ethereum library is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU Lesser General Public License for more details. 13 // 14 // You should have received a copy of the GNU Lesser General Public License 15 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. 16 17 // +build none 18 19 // This file contains a miner stress test based on the Ethash consensus engine. 20 package main 21 22 import ( 23 "crypto/ecdsa" 24 "fmt" 25 "io/ioutil" 26 "math/big" 27 "math/rand" 28 "os" 29 "path/filepath" 30 "time" 31 32 "github.com/ethereum/go-ethereum/accounts/keystore" 33 "github.com/ethereum/go-ethereum/common" 34 "github.com/ethereum/go-ethereum/common/fdlimit" 35 "github.com/ethereum/go-ethereum/consensus/ethash" 36 "github.com/ethereum/go-ethereum/core" 37 "github.com/ethereum/go-ethereum/core/types" 38 "github.com/ethereum/go-ethereum/crypto" 39 "github.com/ethereum/go-ethereum/eth" 40 "github.com/ethereum/go-ethereum/eth/downloader" 41 "github.com/ethereum/go-ethereum/log" 42 "github.com/ethereum/go-ethereum/node" 43 "github.com/ethereum/go-ethereum/p2p" 44 "github.com/ethereum/go-ethereum/p2p/discover" 45 "github.com/ethereum/go-ethereum/params" 46 ) 47 48 func main() { 49 log.Root().SetHandler(log.LvlFilterHandler(log.LvlInfo, log.StreamHandler(os.Stderr, log.TerminalFormat(true)))) 50 fdlimit.Raise(2048) 51 52 // Generate a batch of accounts to seal and fund with 53 faucets := make([]*ecdsa.PrivateKey, 128) 54 for i := 0; i < len(faucets); i++ { 55 faucets[i], _ = crypto.GenerateKey() 56 } 57 // Pre-generate the ethash mining DAG so we don't race 58 ethash.MakeDataset(1, filepath.Join(os.Getenv("HOME"), ".ethash")) 59 60 // Create an Ethash network based off of the Ropsten config 61 genesis := makeGenesis(faucets) 62 63 var ( 64 nodes []*node.Node 65 enodes []string 66 ) 67 for i := 0; i < 4; i++ { 68 // Start the node and wait until it's up 69 node, err := makeMiner(genesis, enodes) 70 if err != nil { 71 panic(err) 72 } 73 defer node.Stop() 74 75 for node.Server().NodeInfo().Ports.Listener == 0 { 76 time.Sleep(250 * time.Millisecond) 77 } 78 // Connect the node to al the previous ones 79 for _, enode := range enodes { 80 enode, err := discover.ParseNode(enode) 81 if err != nil { 82 panic(err) 83 } 84 node.Server().AddPeer(enode) 85 } 86 // Start tracking the node and it's enode url 87 nodes = append(nodes, node) 88 89 enode := fmt.Sprintf("enode://%s@127.0.0.1:%d", node.Server().NodeInfo().ID, node.Server().NodeInfo().Ports.Listener) 90 enodes = append(enodes, enode) 91 92 // Inject the signer key and start sealing with it 93 store := node.AccountManager().Backends(keystore.KeyStoreType)[0].(*keystore.KeyStore) 94 if _, err := store.NewAccount(""); err != nil { 95 panic(err) 96 } 97 } 98 // Iterate over all the nodes and start signing with them 99 time.Sleep(3 * time.Second) 100 101 for _, node := range nodes { 102 var ethereum *eth.Ethereum 103 if err := node.Service(ðereum); err != nil { 104 panic(err) 105 } 106 if err := ethereum.StartMining(1); err != nil { 107 panic(err) 108 } 109 } 110 time.Sleep(3 * time.Second) 111 112 // Start injecting transactions from the faucets like crazy 113 nonces := make([]uint64, len(faucets)) 114 for { 115 index := rand.Intn(len(faucets)) 116 117 // Fetch the accessor for the relevant signer 118 var ethereum *eth.Ethereum 119 if err := nodes[index%len(nodes)].Service(ðereum); err != nil { 120 panic(err) 121 } 122 // Create a self transaction and inject into the pool 123 tx, err := types.SignTx(types.NewTransaction(nonces[index], crypto.PubkeyToAddress(faucets[index].PublicKey), new(big.Int), 21000, big.NewInt(100000000000+rand.Int63n(65536)), nil), types.HomesteadSigner{}, faucets[index]) 124 if err != nil { 125 panic(err) 126 } 127 if err := ethereum.TxPool().AddLocal(tx); err != nil { 128 panic(err) 129 } 130 nonces[index]++ 131 132 // Wait if we're too saturated 133 if pend, _ := ethereum.TxPool().Stats(); pend > 2048 { 134 time.Sleep(100 * time.Millisecond) 135 } 136 } 137 } 138 139 // makeGenesis creates a custom Ethash genesis block based on some pre-defined 140 // faucet accounts. 141 func makeGenesis(faucets []*ecdsa.PrivateKey) *core.Genesis { 142 genesis := core.DefaultTestnetGenesisBlock() 143 genesis.Difficulty = params.MinimumDifficulty 144 genesis.GasLimit = 25000000 145 146 genesis.Config.ChainID = big.NewInt(18) 147 genesis.Config.EIP150Hash = common.Hash{} 148 149 genesis.Alloc = core.GenesisAlloc{} 150 for _, faucet := range faucets { 151 genesis.Alloc[crypto.PubkeyToAddress(faucet.PublicKey)] = core.GenesisAccount{ 152 Balance: new(big.Int).Exp(big.NewInt(2), big.NewInt(128), nil), 153 } 154 } 155 return genesis 156 } 157 158 func makeMiner(genesis *core.Genesis, nodes []string) (*node.Node, error) { 159 // Define the basic configurations for the Ethereum node 160 datadir, _ := ioutil.TempDir("", "") 161 162 config := &node.Config{ 163 Name: "geth", 164 Version: params.Version, 165 DataDir: datadir, 166 P2P: p2p.Config{ 167 ListenAddr: "0.0.0.0:0", 168 NoDiscovery: true, 169 MaxPeers: 25, 170 }, 171 NoUSB: true, 172 UseLightweightKDF: true, 173 } 174 // Start the node and configure a full Ethereum node on it 175 stack, err := node.New(config) 176 if err != nil { 177 return nil, err 178 } 179 if err := stack.Register(func(ctx *node.ServiceContext) (node.Service, error) { 180 return eth.New(ctx, ð.Config{ 181 Genesis: genesis, 182 NetworkId: genesis.Config.ChainID.Uint64(), 183 SyncMode: downloader.FullSync, 184 DatabaseCache: 256, 185 DatabaseHandles: 256, 186 TxPool: core.DefaultTxPoolConfig, 187 GPO: eth.DefaultConfig.GPO, 188 Ethash: eth.DefaultConfig.Ethash, 189 MinerGasFloor: genesis.GasLimit * 9 / 10, 190 MinerGasCeil: genesis.GasLimit * 11 / 10, 191 MinerGasPrice: big.NewInt(1), 192 MinerRecommit: time.Second, 193 }) 194 }); err != nil { 195 return nil, err 196 } 197 // Start the node and return if successful 198 return stack, stack.Start() 199 }