530 lines
15 KiB
Go
530 lines
15 KiB
Go
package client
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import (
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"encoding/hex"
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"strconv"
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"github.com/nspcc-dev/neo-go/pkg/core"
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"github.com/nspcc-dev/neo-go/pkg/core/block"
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"github.com/nspcc-dev/neo-go/pkg/core/state"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/encoding/address"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/rpc/request"
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"github.com/nspcc-dev/neo-go/pkg/rpc/response/result"
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"github.com/nspcc-dev/neo-go/pkg/smartcontract"
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"github.com/nspcc-dev/neo-go/pkg/util"
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"github.com/nspcc-dev/neo-go/pkg/wallet"
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"github.com/pkg/errors"
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)
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// GetApplicationLog returns the contract log based on the specified txid.
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func (c *Client) GetApplicationLog(hash util.Uint256) (*result.ApplicationLog, error) {
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var (
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params = request.NewRawParams(hash.StringLE())
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resp = &result.ApplicationLog{}
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)
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if err := c.performRequest("getapplicationlog", params, resp); err != nil {
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return nil, err
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}
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return resp, nil
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}
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// GetBestBlockHash returns the hash of the tallest block in the main chain.
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func (c *Client) GetBestBlockHash() (util.Uint256, error) {
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var resp = util.Uint256{}
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if err := c.performRequest("getbestblockhash", request.NewRawParams(), &resp); err != nil {
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return resp, err
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}
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return resp, nil
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}
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// GetBlockCount returns the number of blocks in the main chain.
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func (c *Client) GetBlockCount() (uint32, error) {
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var resp uint32
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if err := c.performRequest("getblockcount", request.NewRawParams(), &resp); err != nil {
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return resp, err
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}
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return resp, nil
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}
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// GetBlockByIndex returns a block by its height.
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func (c *Client) GetBlockByIndex(index uint32) (*block.Block, error) {
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return c.getBlock(request.NewRawParams(index))
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}
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// GetBlockByHash returns a block by its hash.
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func (c *Client) GetBlockByHash(hash util.Uint256) (*block.Block, error) {
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return c.getBlock(request.NewRawParams(hash.StringLE()))
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}
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func (c *Client) getBlock(params request.RawParams) (*block.Block, error) {
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var (
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resp string
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err error
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b *block.Block
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)
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if err = c.performRequest("getblock", params, &resp); err != nil {
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return nil, err
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}
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blockBytes, err := hex.DecodeString(resp)
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if err != nil {
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return nil, err
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}
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r := io.NewBinReaderFromBuf(blockBytes)
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b = new(block.Block)
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b.DecodeBinary(r)
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if r.Err != nil {
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return nil, r.Err
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}
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return b, nil
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}
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// GetBlockByIndexVerbose returns a block wrapper with additional metadata by
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// its height.
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// NOTE: to get transaction.ID and transaction.Size, use t.Hash() and io.GetVarSize(t) respectively.
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func (c *Client) GetBlockByIndexVerbose(index uint32) (*result.Block, error) {
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return c.getBlockVerbose(request.NewRawParams(index, 1))
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}
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// GetBlockByHashVerbose returns a block wrapper with additional metadata by
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// its hash.
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func (c *Client) GetBlockByHashVerbose(hash util.Uint256) (*result.Block, error) {
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return c.getBlockVerbose(request.NewRawParams(hash.StringLE(), 1))
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}
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func (c *Client) getBlockVerbose(params request.RawParams) (*result.Block, error) {
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var (
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resp = &result.Block{}
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err error
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)
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if err = c.performRequest("getblock", params, resp); err != nil {
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return nil, err
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}
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return resp, nil
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}
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// GetBlockHash returns the hash value of the corresponding block, based on the specified index.
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func (c *Client) GetBlockHash(index uint32) (util.Uint256, error) {
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var (
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params = request.NewRawParams(index)
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resp = util.Uint256{}
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)
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if err := c.performRequest("getblockhash", params, &resp); err != nil {
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return resp, err
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}
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return resp, nil
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}
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// GetBlockHeader returns the corresponding block header information from serialized hex string
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// according to the specified script hash.
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func (c *Client) GetBlockHeader(hash util.Uint256) (*block.Header, error) {
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var (
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params = request.NewRawParams(hash.StringLE())
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resp string
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h *block.Header
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)
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if err := c.performRequest("getblockheader", params, &resp); err != nil {
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return nil, err
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}
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headerBytes, err := hex.DecodeString(resp)
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if err != nil {
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return nil, err
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}
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r := io.NewBinReaderFromBuf(headerBytes)
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h = new(block.Header)
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h.DecodeBinary(r)
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if r.Err != nil {
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return nil, r.Err
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}
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return h, nil
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}
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// GetBlockHeaderVerbose returns the corresponding block header information from Json format string
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// according to the specified script hash.
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func (c *Client) GetBlockHeaderVerbose(hash util.Uint256) (*result.Header, error) {
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var (
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params = request.NewRawParams(hash.StringLE(), 1)
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resp = &result.Header{}
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)
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if err := c.performRequest("getblockheader", params, resp); err != nil {
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return nil, err
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}
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return resp, nil
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}
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// GetBlockSysFee returns the system fees of the block, based on the specified index.
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func (c *Client) GetBlockSysFee(index uint32) (util.Fixed8, error) {
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var (
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params = request.NewRawParams(index)
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resp util.Fixed8
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)
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if err := c.performRequest("getblocksysfee", params, &resp); err != nil {
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return resp, err
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}
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return resp, nil
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}
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// GetConnectionCount returns the current number of connections for the node.
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func (c *Client) GetConnectionCount() (int, error) {
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var (
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params = request.NewRawParams()
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resp int
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)
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if err := c.performRequest("getconnectioncount", params, &resp); err != nil {
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return resp, err
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}
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return resp, nil
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}
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// GetContractState queries contract information, according to the contract script hash.
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func (c *Client) GetContractState(hash util.Uint160) (*state.Contract, error) {
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var (
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params = request.NewRawParams(hash.StringLE())
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resp = &state.Contract{}
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)
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if err := c.performRequest("getcontractstate", params, resp); err != nil {
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return resp, err
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}
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return resp, nil
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}
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// GetNEP5Balances is a wrapper for getnep5balances RPC.
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func (c *Client) GetNEP5Balances(address util.Uint160) (*result.NEP5Balances, error) {
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params := request.NewRawParams(address.StringLE())
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resp := new(result.NEP5Balances)
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if err := c.performRequest("getnep5balances", params, resp); err != nil {
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return nil, err
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}
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return resp, nil
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}
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// GetNEP5Transfers is a wrapper for getnep5transfers RPC.
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func (c *Client) GetNEP5Transfers(address string) (*result.NEP5Transfers, error) {
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params := request.NewRawParams(address)
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resp := new(result.NEP5Transfers)
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if err := c.performRequest("getnep5transfers", params, resp); err != nil {
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return nil, err
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}
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return resp, nil
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}
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// GetPeers returns the list of nodes that the node is currently connected/disconnected from.
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func (c *Client) GetPeers() (*result.GetPeers, error) {
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var (
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params = request.NewRawParams()
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resp = &result.GetPeers{}
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)
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if err := c.performRequest("getpeers", params, resp); err != nil {
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return resp, err
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}
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return resp, nil
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}
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// GetRawMemPool returns the list of unconfirmed transactions in memory.
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func (c *Client) GetRawMemPool() ([]util.Uint256, error) {
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var (
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params = request.NewRawParams()
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resp = new([]util.Uint256)
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)
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if err := c.performRequest("getrawmempool", params, resp); err != nil {
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return *resp, err
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}
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return *resp, nil
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}
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// GetRawTransaction returns a transaction by hash.
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func (c *Client) GetRawTransaction(hash util.Uint256) (*transaction.Transaction, error) {
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var (
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params = request.NewRawParams(hash.StringLE())
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resp string
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err error
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)
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if err = c.performRequest("getrawtransaction", params, &resp); err != nil {
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return nil, err
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}
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txBytes, err := hex.DecodeString(resp)
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if err != nil {
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return nil, err
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}
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tx, err := transaction.NewTransactionFromBytes(txBytes)
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if err != nil {
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return nil, err
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}
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return tx, nil
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}
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// GetRawTransactionVerbose returns a transaction wrapper with additional
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// metadata by transaction's hash.
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// NOTE: to get transaction.ID and transaction.Size, use t.Hash() and io.GetVarSize(t) respectively.
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func (c *Client) GetRawTransactionVerbose(hash util.Uint256) (*result.TransactionOutputRaw, error) {
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var (
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params = request.NewRawParams(hash.StringLE(), 1)
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resp = &result.TransactionOutputRaw{}
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err error
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)
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if err = c.performRequest("getrawtransaction", params, resp); err != nil {
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return nil, err
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}
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return resp, nil
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}
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// GetStorage returns the stored value, according to the contract script hash and the stored key.
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func (c *Client) GetStorage(hash util.Uint160, key []byte) ([]byte, error) {
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var (
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params = request.NewRawParams(hash.StringLE(), hex.EncodeToString(key))
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resp string
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)
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if err := c.performRequest("getstorage", params, &resp); err != nil {
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return nil, err
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}
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res, err := hex.DecodeString(resp)
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if err != nil {
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return nil, err
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}
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return res, nil
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}
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// GetTransactionHeight returns the block index in which the transaction is found.
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func (c *Client) GetTransactionHeight(hash util.Uint256) (uint32, error) {
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var (
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params = request.NewRawParams(hash.StringLE())
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resp uint32
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)
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if err := c.performRequest("gettransactionheight", params, &resp); err != nil {
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return resp, err
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}
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return resp, nil
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}
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// GetUnclaimedGas returns unclaimed GAS amount for the specified address.
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func (c *Client) GetUnclaimedGas(address string) (util.Fixed8, error) {
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var (
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params = request.NewRawParams(address)
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resp string
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)
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if err := c.performRequest("getunclaimedgas", params, &resp); err != nil {
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return 0, err
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}
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i, err := strconv.ParseInt(resp, 10, 64)
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if err != nil {
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return 0, err
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}
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return util.Fixed8(i), nil
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}
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// GetValidators returns the current NEO consensus nodes information and voting status.
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func (c *Client) GetValidators() ([]result.Validator, error) {
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var (
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params = request.NewRawParams()
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resp = new([]result.Validator)
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)
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if err := c.performRequest("getvalidators", params, resp); err != nil {
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return nil, err
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}
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return *resp, nil
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}
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// GetVersion returns the version information about the queried node.
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func (c *Client) GetVersion() (*result.Version, error) {
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var (
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params = request.NewRawParams()
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resp = &result.Version{}
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)
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if err := c.performRequest("getversion", params, resp); err != nil {
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return nil, err
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}
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return resp, nil
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}
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// InvokeScript returns the result of the given script after running it true the VM.
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// NOTE: This is a test invoke and will not affect the blockchain.
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func (c *Client) InvokeScript(script string, cosigners []transaction.Cosigner) (*result.Invoke, error) {
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var (
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params request.RawParams
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resp = &result.Invoke{}
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)
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if cosigners != nil {
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params = request.NewRawParams(script, cosigners)
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} else {
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params = request.NewRawParams(script)
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}
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if err := c.performRequest("invokescript", params, resp); err != nil {
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return nil, err
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}
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return resp, nil
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}
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// InvokeFunction returns the results after calling the smart contract scripthash
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// with the given operation and parameters.
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// NOTE: this is test invoke and will not affect the blockchain.
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func (c *Client) InvokeFunction(script, operation string, params []smartcontract.Parameter, cosigners []transaction.Cosigner) (*result.Invoke, error) {
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var (
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p request.RawParams
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resp = &result.Invoke{}
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)
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if cosigners != nil {
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p = request.NewRawParams(script, operation, params, cosigners)
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} else {
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p = request.NewRawParams(script, operation, params)
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}
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if err := c.performRequest("invokefunction", p, resp); err != nil {
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return nil, err
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}
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return resp, nil
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}
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// SendRawTransaction broadcasts a transaction over the NEO network.
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// The given hex string needs to be signed with a keypair.
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// When the result of the response object is true, the TX has successfully
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// been broadcasted to the network.
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func (c *Client) SendRawTransaction(rawTX *transaction.Transaction) error {
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var (
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params = request.NewRawParams(hex.EncodeToString(rawTX.Bytes()))
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resp bool
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)
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if err := c.performRequest("sendrawtransaction", params, &resp); err != nil {
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return err
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}
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if !resp {
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return errors.New("sendrawtransaction returned false")
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}
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return nil
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}
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// SubmitBlock broadcasts a raw block over the NEO network.
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func (c *Client) SubmitBlock(b block.Block) error {
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var (
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params request.RawParams
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resp bool
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)
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buf := io.NewBufBinWriter()
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b.EncodeBinary(buf.BinWriter)
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if err := buf.Err; err != nil {
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return err
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}
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params = request.NewRawParams(hex.EncodeToString(buf.Bytes()))
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if err := c.performRequest("submitblock", params, &resp); err != nil {
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return err
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}
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if !resp {
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return errors.New("submitblock returned false")
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}
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return nil
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}
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// SignAndPushInvocationTx signs and pushes given script as an invocation
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// transaction using given wif to sign it and spending the amount of gas
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// specified. It returns a hash of the invocation transaction and an error.
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func (c *Client) SignAndPushInvocationTx(script []byte, acc *wallet.Account, sysfee util.Fixed8, netfee util.Fixed8) (util.Uint256, error) {
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var txHash util.Uint256
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var err error
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tx := transaction.New(script, sysfee)
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tx.SystemFee = sysfee
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validUntilBlock, err := c.CalculateValidUntilBlock()
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if err != nil {
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return txHash, errors.Wrap(err, "failed to add validUntilBlock to transaction")
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}
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tx.ValidUntilBlock = validUntilBlock
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addr, err := address.StringToUint160(acc.Address)
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if err != nil {
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return txHash, errors.Wrap(err, "failed to get address")
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}
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tx.Sender = addr
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err = c.AddNetworkFee(tx, acc)
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if err != nil {
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return txHash, errors.Wrapf(err, "failed to add network fee")
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}
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if err = acc.SignTx(tx); err != nil {
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return txHash, errors.Wrap(err, "failed to sign tx")
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}
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txHash = tx.Hash()
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err = c.SendRawTransaction(tx)
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if err != nil {
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return txHash, errors.Wrap(err, "failed sendning tx")
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}
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return txHash, nil
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}
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// ValidateAddress verifies that the address is a correct NEO address.
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func (c *Client) ValidateAddress(address string) error {
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var (
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params = request.NewRawParams(address)
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resp = &result.ValidateAddress{}
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)
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if err := c.performRequest("validateaddress", params, resp); err != nil {
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return err
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}
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if !resp.IsValid {
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return errors.New("validateaddress returned false")
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}
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return nil
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}
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// CalculateValidUntilBlock calculates ValidUntilBlock field for tx as
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// current blockchain height + number of validators. Number of validators
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// is the length of blockchain validators list got from GetValidators()
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// method. Validators count is being cached and updated every 100 blocks.
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func (c *Client) CalculateValidUntilBlock() (uint32, error) {
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var (
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result uint32
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validatorsCount uint32
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)
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blockCount, err := c.GetBlockCount()
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if err != nil {
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return result, errors.Wrapf(err, "cannot get block count")
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}
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if c.cache.calculateValidUntilBlock.expiresAt > blockCount {
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validatorsCount = c.cache.calculateValidUntilBlock.validatorsCount
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} else {
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validators, err := c.GetValidators()
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if err != nil {
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return result, errors.Wrapf(err, "cannot get validators")
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}
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validatorsCount = uint32(len(validators))
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c.cache.calculateValidUntilBlock = calculateValidUntilBlockCache{
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validatorsCount: validatorsCount,
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expiresAt: blockCount + cacheTimeout,
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}
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}
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return blockCount + validatorsCount, nil
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}
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// AddNetworkFee adds network fee for each witness script to transaction.
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func (c *Client) AddNetworkFee(tx *transaction.Transaction, acc *wallet.Account) error {
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size := io.GetVarSize(tx)
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if acc.Contract != nil {
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netFee, sizeDelta := core.CalculateNetworkFee(acc.Contract.Script)
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tx.NetworkFee += netFee
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size += sizeDelta
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}
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for _, cosigner := range tx.Cosigners {
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contract, err := c.GetContractState(cosigner.Account)
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if err != nil {
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return err
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}
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if contract == nil {
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continue
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}
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netFee, sizeDelta := core.CalculateNetworkFee(contract.Script)
|
|
tx.NetworkFee += netFee
|
|
size += sizeDelta
|
|
}
|
|
tx.NetworkFee += util.Fixed8(int64(size) * int64(c.GetFeePerByte()))
|
|
return nil
|
|
}
|
|
|
|
// GetFeePerByte returns transaction network fee per byte
|
|
func (c *Client) GetFeePerByte() util.Fixed8 {
|
|
// TODO: make it a part of policy contract
|
|
return util.Fixed8(1000)
|
|
}
|