package morph import ( "bytes" "crypto/elliptic" "errors" "fmt" "os" "sort" "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/fee" "github.com/nspcc-dev/neo-go/pkg/core/native/noderoles" "github.com/nspcc-dev/neo-go/pkg/core/state" "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/crypto/keys" "github.com/nspcc-dev/neo-go/pkg/encoding/fixedn" "github.com/nspcc-dev/neo-go/pkg/io" "github.com/nspcc-dev/neo-go/pkg/neorpc/result" "github.com/nspcc-dev/neo-go/pkg/network/payload" "github.com/nspcc-dev/neo-go/pkg/rpcclient" "github.com/nspcc-dev/neo-go/pkg/smartcontract" "github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag" "github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest" "github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger" "github.com/nspcc-dev/neo-go/pkg/util" "github.com/nspcc-dev/neo-go/pkg/vm" "github.com/nspcc-dev/neo-go/pkg/vm/emit" "github.com/nspcc-dev/neo-go/pkg/vm/opcode" "github.com/nspcc-dev/neo-go/pkg/vm/stackitem" "github.com/nspcc-dev/neo-go/pkg/vm/vmstate" "github.com/nspcc-dev/neo-go/pkg/wallet" "github.com/spf13/viper" "go.uber.org/zap" ) type localClient struct { bc *core.Blockchain transactions []*transaction.Transaction dumpPath string accounts []*wallet.Account maxGasInvoke int64 } func newLocalClient(v *viper.Viper, wallets []*wallet.Wallet) (*localClient, error) { cfg, err := config.LoadFile(v.GetString(protoConfigPath)) if err != nil { return nil, err } bc, err := core.NewBlockchain(storage.NewMemoryStore(), cfg.ProtocolConfiguration, zap.NewNop()) if err != nil { return nil, err } m := smartcontract.GetDefaultHonestNodeCount(cfg.ProtocolConfiguration.ValidatorsCount) accounts := make([]*wallet.Account, len(wallets)) for i := range accounts { accounts[i], err = getWalletAccount(wallets[i], consensusAccountName) if err != nil { return nil, err } } indexMap := make(map[string]int) for i, pub := range cfg.ProtocolConfiguration.StandbyCommittee { indexMap[pub] = i } sort.Slice(accounts, func(i, j int) bool { pi := accounts[i].PrivateKey().PublicKey().Bytes() pj := accounts[j].PrivateKey().PublicKey().Bytes() return indexMap[string(pi)] < indexMap[string(pj)] }) sort.Slice(accounts[:cfg.ProtocolConfiguration.ValidatorsCount], func(i, j int) bool { pi := accounts[i].PrivateKey().PublicKey().Bytes() pj := accounts[j].PrivateKey().PublicKey().Bytes() return bytes.Compare(pi, pj) == -1 }) go bc.Run() return &localClient{ bc: bc, dumpPath: v.GetString(localDumpFlag), accounts: accounts[:m], maxGasInvoke: 15_0000_0000, }, nil } func (l *localClient) GetBlockCount() (uint32, error) { return l.bc.BlockHeight(), nil } func (l *localClient) GetContractStateByID(id int32) (*state.Contract, error) { h, err := l.bc.GetContractScriptHash(id) if err != nil { return nil, err } return l.GetContractStateByHash(h) } func (l *localClient) GetContractStateByHash(h util.Uint160) (*state.Contract, error) { if cs := l.bc.GetContractState(h); cs != nil { return cs, nil } return nil, storage.ErrKeyNotFound } func (l *localClient) GetNativeContracts() ([]state.NativeContract, error) { return l.bc.GetNatives(), nil } func (l *localClient) GetNetwork() (netmode.Magic, error) { return l.bc.GetConfig().Magic, nil } func (l *localClient) GetApplicationLog(h util.Uint256, t *trigger.Type) (*result.ApplicationLog, error) { aer, err := l.bc.GetAppExecResults(h, *t) if err != nil { return nil, err } a := result.NewApplicationLog(h, aer, *t) return &a, nil } func (l *localClient) CreateTxFromScript(script []byte, acc *wallet.Account, sysFee int64, netFee int64, cosigners []rpcclient.SignerAccount) (*transaction.Transaction, error) { signers, accounts, err := getSigners(acc, cosigners) if err != nil { return nil, fmt.Errorf("failed to construct tx signers: %w", err) } if sysFee < 0 { res, err := l.InvokeScript(script, signers) if err != nil { return nil, fmt.Errorf("can't add system fee to transaction: %w", err) } if res.State != "HALT" { return nil, fmt.Errorf("can't add system fee to transaction: bad vm state: %s due to an error: %s", res.State, res.FaultException) } sysFee = res.GasConsumed } tx := transaction.New(script, sysFee) tx.Signers = signers tx.ValidUntilBlock = l.bc.BlockHeight() + 2 err = l.AddNetworkFee(tx, netFee, accounts...) if err != nil { return nil, fmt.Errorf("failed to add network fee: %w", err) } return tx, nil } func (l *localClient) GetCommittee() (keys.PublicKeys, error) { // not used by `morph init` command panic("unexpected call") } // InvokeFunction is implemented via `InvokeScript`. func (l *localClient) InvokeFunction(h util.Uint160, method string, sPrm []smartcontract.Parameter, ss []transaction.Signer) (*result.Invoke, error) { var err error pp := make([]interface{}, len(sPrm)) for i, p := range sPrm { pp[i], err = smartcontract.ExpandParameterToEmitable(p) if err != nil { return nil, fmt.Errorf("incorrect parameter type %s: %w", p.Type, err) } } return invokeFunction(l, h, method, pp, ss) } func (l *localClient) CalculateNotaryFee(_ uint8) (int64, error) { // not used by `morph init` command panic("unexpected call") } func (l *localClient) SignAndPushP2PNotaryRequest(_ *transaction.Transaction, _ []byte, _ int64, _ int64, _ uint32, _ *wallet.Account) (*payload.P2PNotaryRequest, error) { // not used by `morph init` command panic("unexpected call") } func (l *localClient) SignAndPushInvocationTx(_ []byte, _ *wallet.Account, _ int64, _ fixedn.Fixed8, _ []rpcclient.SignerAccount) (util.Uint256, error) { // not used by `morph init` command panic("unexpected call") } // GetVersion return default version. func (l *localClient) GetVersion() (*result.Version, error) { return &result.Version{}, nil } func (l *localClient) InvokeContractVerify(contract util.Uint160, params []smartcontract.Parameter, signers []transaction.Signer, witnesses ...transaction.Witness) (*result.Invoke, error) { // not used by `morph init` command panic("unexpected call") } // CalculateNetworkFee calculates network fee for the given transaction. // Copied from neo-go with minor corrections (no need to support non-notary mode): // https://github.com/nspcc-dev/neo-go/blob/v0.99.2/pkg/services/rpcsrv/server.go#L744 func (l *localClient) CalculateNetworkFee(tx *transaction.Transaction) (int64, error) { hashablePart, err := tx.EncodeHashableFields() if err != nil { return 0, fmt.Errorf("failed to compute tx size: %w", err) } size := len(hashablePart) + io.GetVarSize(len(tx.Signers)) var netFee int64 for i, signer := range tx.Signers { w := tx.Scripts[i] if len(w.InvocationScript) == 0 { // No invocation provided, try to infer one. var paramz []manifest.Parameter if vm.IsSignatureContract(w.VerificationScript) { paramz = []manifest.Parameter{{Type: smartcontract.SignatureType}} } else if nSigs, _, ok := vm.ParseMultiSigContract(w.VerificationScript); ok { paramz = make([]manifest.Parameter, nSigs) for j := 0; j < nSigs; j++ { paramz[j] = manifest.Parameter{Type: smartcontract.SignatureType} } } inv := io.NewBufBinWriter() for _, p := range paramz { p.Type.EncodeBinary(inv.BinWriter) } if inv.Err != nil { return 0, fmt.Errorf("failed to create dummy invocation script (signer %d): %w", i, inv.Err) } w.InvocationScript = inv.Bytes() } gasConsumed, _ := l.bc.VerifyWitness(signer.Account, tx, &w, l.maxGasInvoke) netFee += gasConsumed size += io.GetVarSize(w.VerificationScript) + io.GetVarSize(w.InvocationScript) } // notary service is expected to be enabled attrs := tx.GetAttributes(transaction.NotaryAssistedT) if len(attrs) != 0 { na := attrs[0].Value.(*transaction.NotaryAssisted) netFee += (int64(na.NKeys) + 1) * l.bc.GetNotaryServiceFeePerKey() } fee := l.bc.FeePerByte() netFee += int64(size) * fee return netFee, nil } // AddNetworkFee adds network fee for each witness script and optional extra // network fee to transaction. `accs` is an array signer's accounts. // Copied from neo-go with minor corrections (no need to support contract signers): // https://github.com/nspcc-dev/neo-go/blob/6ff11baa1b9e4c71ef0d1de43b92a8c541ca732c/pkg/rpc/client/rpc.go#L960 func (l *localClient) AddNetworkFee(tx *transaction.Transaction, extraFee int64, accs ...*wallet.Account) error { if len(tx.Signers) != len(accs) { return errors.New("number of signers must match number of scripts") } size := io.GetVarSize(tx) ef := l.bc.GetBaseExecFee() for i := range tx.Signers { netFee, sizeDelta := fee.Calculate(ef, accs[i].Contract.Script) tx.NetworkFee += netFee size += sizeDelta } tx.NetworkFee += int64(size)*l.bc.FeePerByte() + extraFee return nil } // getSigners returns an array of transaction signers and corresponding accounts from // given sender and cosigners. If cosigners list already contains sender, the sender // will be placed at the start of the list. // Copied from neo-go with minor corrections: // https://github.com/nspcc-dev/neo-go/blob/6ff11baa1b9e4c71ef0d1de43b92a8c541ca732c/pkg/rpc/client/rpc.go#L735 func getSigners(sender *wallet.Account, cosigners []rpcclient.SignerAccount) ([]transaction.Signer, []*wallet.Account, error) { var ( signers []transaction.Signer accounts []*wallet.Account ) from := sender.Contract.ScriptHash() s := transaction.Signer{ Account: from, Scopes: transaction.None, } for _, c := range cosigners { if c.Signer.Account == from { s = c.Signer continue } signers = append(signers, c.Signer) accounts = append(accounts, c.Account) } signers = append([]transaction.Signer{s}, signers...) accounts = append([]*wallet.Account{sender}, accounts...) return signers, accounts, nil } func (l *localClient) NEP17BalanceOf(h util.Uint160, acc util.Uint160) (int64, error) { res, err := invokeFunction(l, h, "balanceOf", []interface{}{acc}, nil) if err != nil { return 0, err } if res.State != vmstate.Halt.String() || len(res.Stack) == 0 { return 0, fmt.Errorf("`balance`: invalid response (empty: %t): %s", len(res.Stack) == 0, res.FaultException) } bi, err := res.Stack[0].TryInteger() if err != nil || !bi.IsInt64() { return 0, fmt.Errorf("`balance`: invalid response") } return bi.Int64(), nil } func (l *localClient) InvokeScript(script []byte, signers []transaction.Signer) (*result.Invoke, error) { lastBlock, err := l.bc.GetBlock(l.bc.CurrentBlockHash()) if err != nil { return nil, err } tx := transaction.New(script, 0) tx.Signers = signers tx.ValidUntilBlock = l.bc.BlockHeight() + 2 ic := l.bc.GetTestVM(trigger.Application, tx, &block.Block{ Header: block.Header{ Index: lastBlock.Index + 1, Timestamp: lastBlock.Timestamp + 1, }, }) ic.VM.GasLimit = 100_0000_0000 ic.VM.LoadScriptWithFlags(script, callflag.All) var errStr string if err := ic.VM.Run(); err != nil { errStr = err.Error() } return &result.Invoke{ State: ic.VM.State().String(), GasConsumed: ic.VM.GasConsumed(), Script: script, Stack: ic.VM.Estack().ToArray(), FaultException: errStr, }, nil } func (l *localClient) SendRawTransaction(tx *transaction.Transaction) (util.Uint256, error) { l.transactions = append(l.transactions, tx) return tx.Hash(), nil } func (l *localClient) putTransactions() error { // 1. Prepare new block. lastBlock, err := l.bc.GetBlock(l.bc.CurrentBlockHash()) if err != nil { panic(err) } defer func() { l.transactions = l.transactions[:0] }() b := &block.Block{ Header: block.Header{ NextConsensus: l.accounts[0].Contract.ScriptHash(), Script: transaction.Witness{ VerificationScript: l.accounts[0].Contract.Script, }, Timestamp: lastBlock.Timestamp + 1, }, Transactions: l.transactions, } if l.bc.GetConfig().StateRootInHeader { b.StateRootEnabled = true b.PrevStateRoot = l.bc.GetStateModule().CurrentLocalStateRoot() } b.PrevHash = lastBlock.Hash() b.Index = lastBlock.Index + 1 b.RebuildMerkleRoot() // 2. Sign prepared block. var invocationScript []byte magic := l.bc.GetConfig().Magic for _, acc := range l.accounts { sign := acc.PrivateKey().SignHashable(uint32(magic), b) invocationScript = append(invocationScript, byte(opcode.PUSHDATA1), 64) invocationScript = append(invocationScript, sign...) } b.Script.InvocationScript = invocationScript // 3. Persist block. return l.bc.AddBlock(b) } func invokeFunction(c Client, h util.Uint160, method string, parameters []interface{}, signers []transaction.Signer) (*result.Invoke, error) { w := io.NewBufBinWriter() emit.Array(w.BinWriter, parameters...) emit.AppCallNoArgs(w.BinWriter, h, method, callflag.All) if w.Err != nil { panic(fmt.Sprintf("BUG: invalid parameters for '%s': %v", method, w.Err)) } return c.InvokeScript(w.Bytes(), signers) } var errGetDesignatedByRoleResponse = errors.New("`getDesignatedByRole`: invalid response") func getDesignatedByRole(c Client, h util.Uint160, role noderoles.Role, u uint32) (keys.PublicKeys, error) { res, err := invokeFunction(c, h, "getDesignatedByRole", []interface{}{int64(role), int64(u)}, nil) if err != nil { return nil, err } if res.State != vmstate.Halt.String() || len(res.Stack) == 0 { return nil, errGetDesignatedByRoleResponse } arr, ok := res.Stack[0].Value().([]stackitem.Item) if !ok { return nil, errGetDesignatedByRoleResponse } pubs := make(keys.PublicKeys, len(arr)) for i := range arr { bs, err := arr[i].TryBytes() if err != nil { return nil, errGetDesignatedByRoleResponse } pubs[i], err = keys.NewPublicKeyFromBytes(bs, elliptic.P256()) if err != nil { return nil, errGetDesignatedByRoleResponse } } return pubs, nil } func (l *localClient) dump() (err error) { defer l.bc.Close() f, err := os.Create(l.dumpPath) if err != nil { return err } defer func() { closeErr := f.Close() if err == nil && closeErr != nil { err = closeErr } }() w := io.NewBinWriterFromIO(f) w.WriteU32LE(l.bc.BlockHeight() + 1) err = chaindump.Dump(l.bc, w, 0, l.bc.BlockHeight()) return }