neo-go/pkg/rpc/client/rpc.go

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package client
import (
"encoding/hex"
"fmt"
"github.com/nspcc-dev/neo-go/pkg/core"
"github.com/nspcc-dev/neo-go/pkg/core/block"
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"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"
"github.com/pkg/errors"
)
// 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.
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func (c *Client) GetContractState(hash util.Uint160) (*state.Contract, error) {
var (
params = request.NewRawParams(hash.StringLE())
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resp = &state.Contract{}
)
if err := c.performRequest("getcontractstate", params, resp); err != nil {
return resp, err
}
return resp, nil
}
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// 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
}
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// 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, cosigners []transaction.Cosigner) (*result.Invoke, error) {
var p = request.NewRawParams(hex.EncodeToString(script))
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return c.invokeSomething("invokescript", p, cosigners)
}
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// 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, cosigners []transaction.Cosigner) (*result.Invoke, error) {
var p = request.NewRawParams(contract.StringLE(), operation, params)
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return c.invokeSomething("invokefunction", p, cosigners)
}
// invokeSomething is an inner wrapper for Invoke* functions
func (c *Client) invokeSomething(method string, p request.RawParams, cosigners []transaction.Cosigner) (*result.Invoke, error) {
var resp = new(result.Invoke)
if cosigners != nil {
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p.Values = append(p.Values, cosigners)
}
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if err := c.performRequest(method, p, resp); err != nil {
// Retry with old-fashioned hashes (see neo/neo-modules#260).
if cosigners != nil {
var hashes = make([]util.Uint160, len(cosigners))
for i := range cosigners {
hashes[i] = cosigners[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.Cosigner) (util.Uint256, error) {
var txHash util.Uint256
var err error
tx := transaction.New(c.opts.Network, script, sysfee)
tx.SystemFee = sysfee
tx.Cosigners = cosigners
validUntilBlock, err := c.CalculateValidUntilBlock()
if err != nil {
return txHash, errors.Wrap(err, "failed to add validUntilBlock to transaction")
}
tx.ValidUntilBlock = validUntilBlock
addr, err := address.StringToUint160(acc.Address)
if err != nil {
return txHash, errors.Wrap(err, "failed to get address")
}
tx.Sender = addr
err = c.AddNetworkFee(tx, int64(netfee), acc)
if err != nil {
return txHash, errors.Wrapf(err, "failed to add network fee")
}
if err = acc.SignTx(tx); err != nil {
return txHash, errors.Wrap(err, "failed to sign tx")
}
txHash = tx.Hash()
actualHash, err := c.SendRawTransaction(tx)
if err != nil {
return txHash, errors.Wrap(err, "failed sendning tx")
}
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
}
// 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, errors.Wrapf(err, "cannot get block count")
}
if c.cache.calculateValidUntilBlock.expiresAt > blockCount {
validatorsCount = c.cache.calculateValidUntilBlock.validatorsCount
} else {
validators, err := c.GetValidators()
if err != nil {
return result, errors.Wrapf(err, "cannot get validators")
}
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.Cosigners {
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
}