neo-go/scripts/gendump/main.go

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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{
2021-03-01 13:44:47 +00:00
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
}