package client import ( "encoding/hex" "errors" "fmt" "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/state" "github.com/nspcc-dev/neo-go/pkg/core/transaction" "github.com/nspcc-dev/neo-go/pkg/crypto/hash" "github.com/nspcc-dev/neo-go/pkg/encoding/address" "github.com/nspcc-dev/neo-go/pkg/io" "github.com/nspcc-dev/neo-go/pkg/rpc/request" "github.com/nspcc-dev/neo-go/pkg/rpc/response/result" "github.com/nspcc-dev/neo-go/pkg/smartcontract" "github.com/nspcc-dev/neo-go/pkg/util" "github.com/nspcc-dev/neo-go/pkg/wallet" ) // GetApplicationLog returns the contract log based on the specified txid. func (c *Client) GetApplicationLog(hash util.Uint256) (*result.ApplicationLog, error) { var ( params = request.NewRawParams(hash.StringLE()) resp = &result.ApplicationLog{} ) if err := c.performRequest("getapplicationlog", params, resp); err != nil { return nil, err } return resp, nil } // GetBestBlockHash returns the hash of the tallest block in the main chain. func (c *Client) GetBestBlockHash() (util.Uint256, error) { var resp = util.Uint256{} if err := c.performRequest("getbestblockhash", request.NewRawParams(), &resp); err != nil { return resp, err } return resp, nil } // GetBlockCount returns the number of blocks in the main chain. func (c *Client) GetBlockCount() (uint32, error) { var resp uint32 if err := c.performRequest("getblockcount", request.NewRawParams(), &resp); err != nil { return resp, err } return resp, nil } // GetBlockByIndex returns a block by its height. func (c *Client) GetBlockByIndex(index uint32) (*block.Block, error) { return c.getBlock(request.NewRawParams(index)) } // GetBlockByHash returns a block by its hash. func (c *Client) GetBlockByHash(hash util.Uint256) (*block.Block, error) { return c.getBlock(request.NewRawParams(hash.StringLE())) } func (c *Client) getBlock(params request.RawParams) (*block.Block, error) { var ( resp string err error b *block.Block ) if err = c.performRequest("getblock", params, &resp); err != nil { return nil, err } blockBytes, err := hex.DecodeString(resp) if err != nil { return nil, err } r := io.NewBinReaderFromBuf(blockBytes) b = block.New(c.opts.Network) b.DecodeBinary(r) if r.Err != nil { return nil, r.Err } return b, nil } // GetBlockByIndexVerbose returns a block wrapper with additional metadata by // its height. // NOTE: to get transaction.ID and transaction.Size, use t.Hash() and io.GetVarSize(t) respectively. func (c *Client) GetBlockByIndexVerbose(index uint32) (*result.Block, error) { return c.getBlockVerbose(request.NewRawParams(index, 1)) } // GetBlockByHashVerbose returns a block wrapper with additional metadata by // its hash. func (c *Client) GetBlockByHashVerbose(hash util.Uint256) (*result.Block, error) { return c.getBlockVerbose(request.NewRawParams(hash.StringLE(), 1)) } func (c *Client) getBlockVerbose(params request.RawParams) (*result.Block, error) { var ( resp = &result.Block{} err error ) resp.Network = c.opts.Network if err = c.performRequest("getblock", params, resp); err != nil { return nil, err } return resp, nil } // GetBlockHash returns the hash value of the corresponding block, based on the specified index. func (c *Client) GetBlockHash(index uint32) (util.Uint256, error) { var ( params = request.NewRawParams(index) resp = util.Uint256{} ) if err := c.performRequest("getblockhash", params, &resp); err != nil { return resp, err } return resp, nil } // GetBlockHeader returns the corresponding block header information from serialized hex string // according to the specified script hash. func (c *Client) GetBlockHeader(hash util.Uint256) (*block.Header, error) { var ( params = request.NewRawParams(hash.StringLE()) resp string h *block.Header ) if err := c.performRequest("getblockheader", params, &resp); err != nil { return nil, err } headerBytes, err := hex.DecodeString(resp) if err != nil { return nil, err } r := io.NewBinReaderFromBuf(headerBytes) h = new(block.Header) h.Network = c.opts.Network h.DecodeBinary(r) if r.Err != nil { return nil, r.Err } return h, nil } // GetBlockHeaderVerbose returns the corresponding block header information from Json format string // according to the specified script hash. func (c *Client) GetBlockHeaderVerbose(hash util.Uint256) (*result.Header, error) { var ( params = request.NewRawParams(hash.StringLE(), 1) resp = &result.Header{} ) if err := c.performRequest("getblockheader", params, resp); err != nil { return nil, err } return resp, nil } // GetBlockSysFee returns the system fees of the block, based on the specified index. func (c *Client) GetBlockSysFee(index uint32) (util.Fixed8, error) { var ( params = request.NewRawParams(index) resp util.Fixed8 ) if err := c.performRequest("getblocksysfee", params, &resp); err != nil { return resp, err } return resp, nil } // GetConnectionCount returns the current number of connections for the node. func (c *Client) GetConnectionCount() (int, error) { var ( params = request.NewRawParams() resp int ) if err := c.performRequest("getconnectioncount", params, &resp); err != nil { return resp, err } return resp, nil } // GetContractState queries contract information, according to the contract script hash. func (c *Client) GetContractState(hash util.Uint160) (*state.Contract, error) { var ( params = request.NewRawParams(hash.StringLE()) resp = &state.Contract{} ) if err := c.performRequest("getcontractstate", params, resp); err != nil { return resp, err } return resp, nil } // GetNEP5Balances is a wrapper for getnep5balances RPC. func (c *Client) GetNEP5Balances(address util.Uint160) (*result.NEP5Balances, error) { params := request.NewRawParams(address.StringLE()) resp := new(result.NEP5Balances) if err := c.performRequest("getnep5balances", params, resp); err != nil { return nil, err } return resp, nil } // GetNEP5Transfers is a wrapper for getnep5transfers RPC. func (c *Client) GetNEP5Transfers(address string) (*result.NEP5Transfers, error) { params := request.NewRawParams(address) resp := new(result.NEP5Transfers) if err := c.performRequest("getnep5transfers", params, resp); err != nil { return nil, err } return resp, nil } // GetPeers returns the list of nodes that the node is currently connected/disconnected from. func (c *Client) GetPeers() (*result.GetPeers, error) { var ( params = request.NewRawParams() resp = &result.GetPeers{} ) if err := c.performRequest("getpeers", params, resp); err != nil { return resp, err } return resp, nil } // GetRawMemPool returns the list of unconfirmed transactions in memory. func (c *Client) GetRawMemPool() ([]util.Uint256, error) { var ( params = request.NewRawParams() resp = new([]util.Uint256) ) if err := c.performRequest("getrawmempool", params, resp); err != nil { return *resp, err } return *resp, nil } // GetRawTransaction returns a transaction by hash. func (c *Client) GetRawTransaction(hash util.Uint256) (*transaction.Transaction, error) { var ( params = request.NewRawParams(hash.StringLE()) resp string err error ) if err = c.performRequest("getrawtransaction", params, &resp); err != nil { return nil, err } txBytes, err := hex.DecodeString(resp) if err != nil { return nil, err } tx, err := transaction.NewTransactionFromBytes(c.opts.Network, txBytes) if err != nil { return nil, err } return tx, nil } // GetRawTransactionVerbose returns a transaction wrapper with additional // metadata by transaction's hash. // NOTE: to get transaction.ID and transaction.Size, use t.Hash() and io.GetVarSize(t) respectively. func (c *Client) GetRawTransactionVerbose(hash util.Uint256) (*result.TransactionOutputRaw, error) { var ( params = request.NewRawParams(hash.StringLE(), 1) resp = &result.TransactionOutputRaw{} err error ) resp.Network = c.opts.Network if err = c.performRequest("getrawtransaction", params, resp); err != nil { return nil, err } return resp, nil } // GetStorageByID returns the stored value, according to the contract ID and the stored key. func (c *Client) GetStorageByID(id int32, key []byte) ([]byte, error) { return c.getStorage(request.NewRawParams(id, hex.EncodeToString(key))) } // GetStorageByHash returns the stored value, according to the contract script hash and the stored key. func (c *Client) GetStorageByHash(hash util.Uint160, key []byte) ([]byte, error) { return c.getStorage(request.NewRawParams(hash.StringLE(), hex.EncodeToString(key))) } func (c *Client) getStorage(params request.RawParams) ([]byte, error) { var resp string if err := c.performRequest("getstorage", params, &resp); err != nil { return nil, err } res, err := hex.DecodeString(resp) if err != nil { return nil, err } return res, nil } // GetTransactionHeight returns the block index in which the transaction is found. func (c *Client) GetTransactionHeight(hash util.Uint256) (uint32, error) { var ( params = request.NewRawParams(hash.StringLE()) resp uint32 ) if err := c.performRequest("gettransactionheight", params, &resp); err != nil { return resp, err } return resp, nil } // GetUnclaimedGas returns unclaimed GAS amount for the specified address. func (c *Client) GetUnclaimedGas(address string) (result.UnclaimedGas, error) { var ( params = request.NewRawParams(address) resp result.UnclaimedGas ) if err := c.performRequest("getunclaimedgas", params, &resp); err != nil { return resp, err } return resp, nil } // GetValidators returns the current NEO consensus nodes information and voting status. func (c *Client) GetValidators() ([]result.Validator, error) { var ( params = request.NewRawParams() resp = new([]result.Validator) ) if err := c.performRequest("getvalidators", params, resp); err != nil { return nil, err } return *resp, nil } // GetVersion returns the version information about the queried node. func (c *Client) GetVersion() (*result.Version, error) { var ( params = request.NewRawParams() resp = &result.Version{} ) if err := c.performRequest("getversion", params, resp); err != nil { return nil, err } return resp, nil } // InvokeScript returns the result of the given script after running it true the VM. // NOTE: This is a test invoke and will not affect the blockchain. func (c *Client) InvokeScript(script []byte, signers []transaction.Signer) (*result.Invoke, error) { var p = request.NewRawParams(hex.EncodeToString(script)) return c.invokeSomething("invokescript", p, signers) } // InvokeFunction returns the results after calling the smart contract scripthash // with the given operation and parameters. // NOTE: this is test invoke and will not affect the blockchain. func (c *Client) InvokeFunction(contract util.Uint160, operation string, params []smartcontract.Parameter, signers []transaction.Signer) (*result.Invoke, error) { var p = request.NewRawParams(contract.StringLE(), operation, params) return c.invokeSomething("invokefunction", p, signers) } // invokeSomething is an inner wrapper for Invoke* functions func (c *Client) invokeSomething(method string, p request.RawParams, signers []transaction.Signer) (*result.Invoke, error) { var resp = new(result.Invoke) if signers != nil { p.Values = append(p.Values, signers) } if err := c.performRequest(method, p, resp); err != nil { // Retry with old-fashioned hashes (see neo/neo-modules#260). if signers != nil { var hashes = make([]util.Uint160, len(signers)) for i := range signers { hashes[i] = signers[i].Account } p.Values[len(p.Values)-1] = hashes err = c.performRequest(method, p, resp) if err == nil { return resp, nil } } return nil, err } return resp, nil } // SendRawTransaction broadcasts a transaction over the NEO network. // The given hex string needs to be signed with a keypair. // When the result of the response object is true, the TX has successfully // been broadcasted to the network. func (c *Client) SendRawTransaction(rawTX *transaction.Transaction) (util.Uint256, error) { var ( params = request.NewRawParams(hex.EncodeToString(rawTX.Bytes())) resp = new(result.RelayResult) ) if err := c.performRequest("sendrawtransaction", params, resp); err != nil { return util.Uint256{}, err } return resp.Hash, nil } // SubmitBlock broadcasts a raw block over the NEO network. func (c *Client) SubmitBlock(b block.Block) (util.Uint256, error) { var ( params request.RawParams resp = new(result.RelayResult) ) buf := io.NewBufBinWriter() b.EncodeBinary(buf.BinWriter) if err := buf.Err; err != nil { return util.Uint256{}, err } params = request.NewRawParams(hex.EncodeToString(buf.Bytes())) if err := c.performRequest("submitblock", params, resp); err != nil { return util.Uint256{}, err } return resp.Hash, nil } // SignAndPushInvocationTx signs and pushes given script as an invocation // transaction using given wif to sign it and spending the amount of gas // specified. It returns a hash of the invocation transaction and an error. func (c *Client) SignAndPushInvocationTx(script []byte, acc *wallet.Account, sysfee int64, netfee util.Fixed8, cosigners []transaction.Signer) (util.Uint256, error) { var txHash util.Uint256 var err error tx := transaction.New(c.opts.Network, script, sysfee) tx.SystemFee = sysfee addr, err := address.StringToUint160(acc.Address) if err != nil { return txHash, fmt.Errorf("failed to get address: %w", err) } tx.Signers = getSigners(addr, cosigners) validUntilBlock, err := c.CalculateValidUntilBlock() if err != nil { return txHash, fmt.Errorf("failed to add validUntilBlock to transaction: %w", err) } tx.ValidUntilBlock = validUntilBlock err = c.AddNetworkFee(tx, int64(netfee), acc) if err != nil { return txHash, fmt.Errorf("failed to add network fee: %w", err) } if err = acc.SignTx(tx); err != nil { return txHash, fmt.Errorf("failed to sign tx: %w", err) } txHash = tx.Hash() actualHash, err := c.SendRawTransaction(tx) if err != nil { return txHash, fmt.Errorf("failed to send tx: %w", err) } if !actualHash.Equals(txHash) { return actualHash, fmt.Errorf("sent and actual tx hashes mismatch:\n\tsent: %v\n\tactual: %v", txHash.StringLE(), actualHash.StringLE()) } return txHash, nil } // getSigners returns an array of transaction signers from given sender and cosigners. // If cosigners list already contains sender, the sender will be placed at the start of // the list. func getSigners(sender util.Uint160, cosigners []transaction.Signer) []transaction.Signer { s := transaction.Signer{ Account: sender, Scopes: transaction.FeeOnly, } for i, c := range cosigners { if c.Account == sender { if i == 0 { return cosigners } s.Scopes = c.Scopes cosigners = append(cosigners[:i], cosigners[i+1:]...) break } } return append([]transaction.Signer{s}, cosigners...) } // ValidateAddress verifies that the address is a correct NEO address. func (c *Client) ValidateAddress(address string) error { var ( params = request.NewRawParams(address) resp = &result.ValidateAddress{} ) if err := c.performRequest("validateaddress", params, resp); err != nil { return err } if !resp.IsValid { return errors.New("validateaddress returned false") } return nil } // CalculateValidUntilBlock calculates ValidUntilBlock field for tx as // current blockchain height + number of validators. Number of validators // is the length of blockchain validators list got from GetValidators() // method. Validators count is being cached and updated every 100 blocks. func (c *Client) CalculateValidUntilBlock() (uint32, error) { var ( result uint32 validatorsCount uint32 ) blockCount, err := c.GetBlockCount() if err != nil { return result, fmt.Errorf("can't get block count: %w", err) } if c.cache.calculateValidUntilBlock.expiresAt > blockCount { validatorsCount = c.cache.calculateValidUntilBlock.validatorsCount } else { validators, err := c.GetValidators() if err != nil { return result, fmt.Errorf("can't get validators: %w", err) } validatorsCount = uint32(len(validators)) c.cache.calculateValidUntilBlock = calculateValidUntilBlockCache{ validatorsCount: validatorsCount, expiresAt: blockCount + cacheTimeout, } } return blockCount + validatorsCount, nil } // AddNetworkFee adds network fee for each witness script and optional extra // network fee to transaction. func (c *Client) AddNetworkFee(tx *transaction.Transaction, extraFee int64, acc *wallet.Account) error { size := io.GetVarSize(tx) if acc.Contract != nil { netFee, sizeDelta := core.CalculateNetworkFee(acc.Contract.Script) tx.NetworkFee += netFee size += sizeDelta } for _, cosigner := range tx.Signers { script := acc.Contract.Script if !cosigner.Account.Equals(hash.Hash160(acc.Contract.Script)) { contract, err := c.GetContractState(cosigner.Account) if err != nil { return err } if contract == nil { continue } script = contract.Script } netFee, sizeDelta := core.CalculateNetworkFee(script) tx.NetworkFee += netFee size += sizeDelta } fee, err := c.GetFeePerByte() if err != nil { return err } tx.NetworkFee += int64(size)*fee + extraFee return nil }