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303 lines
9.7 KiB
303 lines
9.7 KiB
package main
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import (
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"encoding/hex"
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"flag"
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"fmt"
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"harmony-benchmark/blockchain"
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"harmony-benchmark/client"
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"harmony-benchmark/configr"
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"harmony-benchmark/consensus"
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"harmony-benchmark/log"
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"harmony-benchmark/node"
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"harmony-benchmark/p2p"
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"math/rand"
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"strconv"
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"sync"
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"time"
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)
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type txGenSettings struct {
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numOfAddress int
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crossShard bool
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maxNumTxsPerBatch int
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}
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var (
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utxoPoolMutex sync.Mutex
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setting txGenSettings
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)
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// Generates at most "maxNumTxs" number of simulated transactions based on the current UtxoPools of all shards.
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// The transactions are generated by going through the existing utxos and
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// randomly select a subset of them as the input for each new transaction. The output
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// address of the new transaction are randomly selected from [0 - N), where N is the total number of fake addresses.
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//
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// When crossShard=true, besides the selected utxo input, select another valid utxo as input from the same address in a second shard.
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// Similarly, generate another utxo output in that second shard.
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//
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// NOTE: the genesis block should contain N coinbase transactions which add
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// token (1000) to each address in [0 - N). See node.AddTestingAddresses()
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//
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// Params:
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// shardId - the shardId for current shard
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// dataNodes - nodes containing utxopools of all shards
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// Returns:
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// all single-shard txs
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// all cross-shard txs
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func generateSimulatedTransactions(shardId int, dataNodes []*node.Node) ([]*blockchain.Transaction, []*blockchain.Transaction) {
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/*
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UTXO map structure:
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address - [
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txId1 - [
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outputIndex1 - value1
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outputIndex2 - value2
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]
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txId2 - [
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outputIndex1 - value1
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outputIndex2 - value2
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]
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]
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*/
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var txs []*blockchain.Transaction
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var crossTxs []*blockchain.Transaction
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txsCount := 0
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utxoPoolMutex.Lock()
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UTXOLOOP:
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// Loop over all addresses
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for address, txMap := range dataNodes[shardId].UtxoPool.UtxoMap {
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// Loop over all txIds for the address
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for txIdStr, utxoMap := range txMap {
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// Parse TxId
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id, err := hex.DecodeString(txIdStr)
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if err != nil {
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continue
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}
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txId := [32]byte{}
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copy(txId[:], id[:])
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// Loop over all utxos for the txId
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for index, value := range utxoMap {
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if txsCount >= setting.maxNumTxsPerBatch {
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break UTXOLOOP
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}
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randNum := rand.Intn(100)
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// 30% sample rate to select UTXO to use for new transactions
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if randNum >= 30 {
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continue
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}
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if setting.crossShard && randNum < 10 { // 1/3 cross shard transactions: add another txinput from another shard
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// shard with neighboring Id
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crossShardId := (int(dataNodes[shardId].Consensus.ShardID) + 1) % len(dataNodes)
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crossShardNode := dataNodes[crossShardId]
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crossShardUtxosMap := crossShardNode.UtxoPool.UtxoMap[address]
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// Get the cross shard utxo from another shard
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var crossTxin *blockchain.TXInput
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crossUtxoValue := 0
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// Loop over utxos for the same address from the other shard and use the first utxo as the second cross tx input
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for crossTxIdStr, crossShardUtxos := range crossShardUtxosMap {
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// Parse TxId
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id, err := hex.DecodeString(crossTxIdStr)
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if err != nil {
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continue
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}
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crossTxId := [32]byte{}
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copy(crossTxId[:], id[:])
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for crossShardIndex, crossShardValue := range crossShardUtxos {
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crossUtxoValue = crossShardValue
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crossTxin = &blockchain.TXInput{crossTxId, crossShardIndex, address, uint32(crossShardId)}
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break
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}
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if crossTxin != nil {
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break
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}
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}
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// Add the utxo from current shard
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txin := blockchain.TXInput{txId, index, address, dataNodes[shardId].Consensus.ShardID}
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txInputs := []blockchain.TXInput{txin}
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// Add the utxo from the other shard, if any
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if crossTxin != nil {
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txInputs = append(txInputs, *crossTxin)
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}
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// Spend the utxo from the current shard to a random address in [0 - N)
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txout := blockchain.TXOutput{value, strconv.Itoa(rand.Intn(setting.numOfAddress)), dataNodes[shardId].Consensus.ShardID}
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txOutputs := []blockchain.TXOutput{txout}
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// Spend the utxo from the other shard, if any, to a random address in [0 - N)
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if crossTxin != nil {
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crossTxout := blockchain.TXOutput{crossUtxoValue, strconv.Itoa(rand.Intn(setting.numOfAddress)), uint32(crossShardId)}
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txOutputs = append(txOutputs, crossTxout)
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}
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// Construct the new transaction
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tx := blockchain.Transaction{[32]byte{}, txInputs, txOutputs, nil}
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tx.SetID()
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crossTxs = append(crossTxs, &tx)
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txsCount++
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} else {
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// Add the utxo as new tx input
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txin := blockchain.TXInput{txId, index, address, dataNodes[shardId].Consensus.ShardID}
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// Spend the utxo to a random address in [0 - N)
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txout := blockchain.TXOutput{value, strconv.Itoa(rand.Intn(setting.numOfAddress)), dataNodes[shardId].Consensus.ShardID}
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tx := blockchain.Transaction{[32]byte{}, []blockchain.TXInput{txin}, []blockchain.TXOutput{txout}, nil}
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tx.SetID()
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txs = append(txs, &tx)
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txsCount++
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}
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}
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}
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}
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utxoPoolMutex.Unlock()
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return txs, crossTxs
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}
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// A utility func that counts the total number of utxos in a pool.
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func countNumOfUtxos(utxoPool *blockchain.UTXOPool) int {
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countAll := 0
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for _, utxoMap := range utxoPool.UtxoMap {
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for txIdStr, val := range utxoMap {
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_ = val
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id, err := hex.DecodeString(txIdStr)
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if err != nil {
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continue
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}
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txId := [32]byte{}
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copy(txId[:], id[:])
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for _, utxo := range val {
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_ = utxo
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countAll++
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}
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}
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}
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return countAll
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}
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func main() {
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configFile := flag.String("config_file", "local_config.txt", "file containing all ip addresses and config")
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maxNumTxsPerBatch := flag.Int("max_num_txs_per_batch", 100000, "number of transactions to send per message")
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logFolder := flag.String("log_folder", "latest", "the folder collecting the logs of this execution")
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flag.Parse()
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// Read the configs
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config, _ := configr.ReadConfigFile(*configFile)
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leaders, shardIds := configr.GetLeadersAndShardIds(&config)
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setting.numOfAddress = 10000
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// Do cross shard tx if there are more than one shard
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setting.crossShard = len(shardIds) > 1
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setting.maxNumTxsPerBatch = *maxNumTxsPerBatch
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// TODO(Richard): refactor this chuck to a single method
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// Setup a logger to stdout and log file.
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logFileName := fmt.Sprintf("./%v/txgen.log", *logFolder)
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h := log.MultiHandler(
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log.StdoutHandler,
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log.Must.FileHandler(logFileName, log.LogfmtFormat()), // Log to file
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// log.Must.NetHandler("tcp", ":3000", log.JSONFormat()) // Log to remote
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)
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log.Root().SetHandler(h)
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// Nodes containing utxopools to mirror the shards' data in the network
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nodes := []*node.Node{}
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for _, shardId := range shardIds {
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node := node.New(&consensus.Consensus{ShardID: shardId})
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// Assign many fake addresses so we have enough address to play with at first
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node.AddTestingAddresses(setting.numOfAddress)
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nodes = append(nodes, node)
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}
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// Client/txgenerator server node setup
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clientPort := configr.GetClientPort(&config)
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consensusObj := consensus.NewConsensus("0", clientPort, "0", nil, p2p.Peer{})
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clientNode := node.New(consensusObj)
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if clientPort != "" {
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clientNode.Client = client.NewClient(&leaders)
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// This func is used to update the client's utxopool when new blocks are received from the leaders
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updateBlocksFunc := func(blocks []*blockchain.Block) {
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log.Debug("Received new block from leader", "len", len(blocks))
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for _, block := range blocks {
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for _, node := range nodes {
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if node.Consensus.ShardID == block.ShardId {
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log.Debug("Adding block from leader", "shardId", block.ShardId)
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// Add it to blockchain
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utxoPoolMutex.Lock()
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node.AddNewBlock(block)
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utxoPoolMutex.Unlock()
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} else {
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continue
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}
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}
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}
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}
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clientNode.Client.UpdateBlocks = updateBlocksFunc
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// Start the client server to listen to leader's message
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go func() {
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clientNode.StartServer(clientPort)
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}()
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}
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// Transaction generation process
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time.Sleep(10 * time.Second) // wait for nodes to be ready
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start := time.Now()
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totalTime := 300.0 //run for 5 minutes
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for true {
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t := time.Now()
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if t.Sub(start).Seconds() >= totalTime {
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log.Debug("Generator timer ended.", "duration", (int(t.Sub(start))), "startTime", start, "totalTime", totalTime)
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break
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}
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allCrossTxs := []*blockchain.Transaction{}
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// Generate simulated transactions
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for i, leader := range leaders {
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txs, crossTxs := generateSimulatedTransactions(i, nodes)
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allCrossTxs = append(allCrossTxs, crossTxs...)
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log.Debug("[Generator] Sending single-shard txs ...", "leader", leader, "numTxs", len(txs), "numCrossTxs", len(crossTxs))
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msg := node.ConstructTransactionListMessage(txs)
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p2p.SendMessage(leader, msg)
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// Note cross shard txs are later sent in batch
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}
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if len(allCrossTxs) > 0 {
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log.Debug("[Generator] Broadcasting cross-shard txs ...", "allCrossTxs", len(allCrossTxs))
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msg := node.ConstructTransactionListMessage(allCrossTxs)
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p2p.BroadcastMessage(leaders, msg)
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// Put cross shard tx into a pending list waiting for proofs from leaders
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if clientPort != "" {
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clientNode.Client.PendingCrossTxsMutex.Lock()
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for _, tx := range allCrossTxs {
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clientNode.Client.PendingCrossTxs[tx.ID] = tx
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}
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clientNode.Client.PendingCrossTxsMutex.Unlock()
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}
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}
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time.Sleep(500 * time.Millisecond) // Send a batch of transactions periodically
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}
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// Send a stop message to stop the nodes at the end
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msg := node.ConstructStopMessage()
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peers := append(configr.GetValidators(*configFile), leaders...)
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p2p.BroadcastMessage(peers, msg)
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}
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