package main import ( "crypto/rand" "errors" "flag" "fmt" "os" "strings" "time" "github.com/nspcc-dev/neo-go/internal/testchain" "github.com/nspcc-dev/neo-go/pkg/config" "github.com/nspcc-dev/neo-go/pkg/config/netmode" "github.com/nspcc-dev/neo-go/pkg/core" "github.com/nspcc-dev/neo-go/pkg/core/block" "github.com/nspcc-dev/neo-go/pkg/core/chaindump" "github.com/nspcc-dev/neo-go/pkg/core/native" "github.com/nspcc-dev/neo-go/pkg/core/storage" "github.com/nspcc-dev/neo-go/pkg/core/transaction" "github.com/nspcc-dev/neo-go/pkg/io" "github.com/nspcc-dev/neo-go/pkg/smartcontract" "github.com/nspcc-dev/neo-go/pkg/wallet" "go.uber.org/zap" "go.uber.org/zap/zapcore" ) // Takes 1 minute for 100 tx per block and 5000 blocks. const ( defaultBlockCount = 5000 defaultTxPerBlock = 100 ) var ( outFile = flag.String("out", "", "filename to write dump to") blockCount = flag.Uint("blocks", defaultBlockCount, "number of blocks to generate") txPerBlock = flag.Uint("txs", defaultTxPerBlock, "number of blocks to generate") ) func main() { flag.Parse() if *outFile == "" { handleError("", errors.New("output file is not provided")) } outStream, err := os.Create(*outFile) // fail early handleError("can't open output file", err) defer outStream.Close() const contract = ` package contract import "github.com/nspcc-dev/neo-go/pkg/interop/storage" var ctx = storage.GetContext() func Put(key, value []byte) { storage.Put(ctx, key, value) }` acc, err := wallet.NewAccount() handleError("can't create new account", err) h := acc.Contract.ScriptHash() bc, err := newChain() handleError("can't initialize blockchain", err) nbVals, err := bc.GetNextBlockValidators() handleError("can't get next block validators", err) valScript, err := smartcontract.CreateDefaultMultiSigRedeemScript(nbVals) handleError("can't create verification script", err) lastBlock, err := bc.GetBlock(bc.GetHeaderHash(bc.BlockHeight())) handleError("can't fetch last block", err) txMoveNeo, err := testchain.NewTransferFromOwner(bc, bc.GoverningTokenHash(), h, native.NEOTotalSupply, 0, 2) handleError("can't transfer NEO", err) txMoveGas, err := testchain.NewTransferFromOwner(bc, bc.UtilityTokenHash(), h, 2_000_000_000_000_000, 0, 2) handleError("can't tranfser GAS", err) lastBlock = addBlock(bc, lastBlock, valScript, txMoveNeo, txMoveGas) tx, contractHash, _, err := testchain.NewDeployTx(bc, "DumpContract.go", h, strings.NewReader(contract), nil) handleError("can't create deploy tx", err) tx.NetworkFee = 10_000_000 tx.ValidUntilBlock = bc.BlockHeight() + 1 handleError("can't sign deploy tx", acc.SignTx(netmode.UnitTestNet, tx)) lastBlock = addBlock(bc, lastBlock, valScript, tx) key := make([]byte, 10) value := make([]byte, 10) nonce := uint32(0) blocksNum := uint32(*blockCount) txNum := int(*txPerBlock) for i := bc.BlockHeight(); i < blocksNum; i++ { txs := make([]*transaction.Transaction, txNum) for j := 0; j < txNum; j++ { nonce++ _, err = rand.Read(key) handleError("can't get random data for key", err) _, err = rand.Read(value) handleError("can't get random data for value", err) script, err := smartcontract.CreateCallScript(contractHash, "put", key, value) handleError("can't create transaction", err) tx := transaction.New(script, 4_040_000) tx.ValidUntilBlock = i + 1 tx.NetworkFee = 4_000_000 tx.Nonce = nonce tx.Signers = []transaction.Signer{{ Account: h, Scopes: transaction.CalledByEntry, }} handleError("can't sign tx", acc.SignTx(netmode.UnitTestNet, tx)) txs[j] = tx } lastBlock = addBlock(bc, lastBlock, valScript, txs...) } w := io.NewBinWriterFromIO(outStream) w.WriteU32LE(bc.BlockHeight() + 1) handleError("error during dump", chaindump.Dump(bc, w, 0, bc.BlockHeight()+1)) } func handleError(msg string, err error) { if err != nil { fmt.Printf("%s: %v\n", msg, err) os.Exit(1) } } func newChain() (*core.Blockchain, error) { unitTestNetCfg, err := config.Load("./config", netmode.UnitTestNet) if err != nil { return nil, err } unitTestNetCfg.ApplicationConfiguration.SkipBlockVerification = true zapCfg := zap.NewDevelopmentConfig() zapCfg.Level = zap.NewAtomicLevelAt(zapcore.InfoLevel) log, err := zapCfg.Build() if err != nil { return nil, err } chain, err := core.NewBlockchain(storage.NewMemoryStore(), unitTestNetCfg.Blockchain(), log) if err != nil { return nil, err } go chain.Run() return chain, nil } func addBlock(bc *core.Blockchain, lastBlock *block.Block, script []byte, txs ...*transaction.Transaction) *block.Block { b, err := newBlock(bc, lastBlock, script, txs...) if err != nil { handleError("can't create block", err) } if err := bc.AddBlock(b); err != nil { handleError("can't add block", err) } return b } func newBlock(bc *core.Blockchain, lastBlock *block.Block, script []byte, txs ...*transaction.Transaction) (*block.Block, error) { witness := transaction.Witness{VerificationScript: script} b := &block.Block{ Header: block.Header{ PrevHash: lastBlock.Hash(), Timestamp: uint64(time.Now().UTC().Unix())*1000 + uint64(lastBlock.Index), Index: lastBlock.Index + 1, NextConsensus: witness.ScriptHash(), Script: witness, }, Transactions: txs, } if bc.GetConfig().StateRootInHeader { sr, err := bc.GetStateModule().GetStateRoot(bc.BlockHeight()) if err != nil { return nil, err } b.StateRootEnabled = true b.PrevStateRoot = sr.Root } b.RebuildMerkleRoot() b.Script.InvocationScript = testchain.Sign(b) return b, nil }