mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-11-23 23:30:36 +00:00
5ef08f60ae
It's not needed any more with Go 1.13 as we have wrapping/unwrapping in base packages. All errors.Wrap calls are replaced with fmt.Errorf, some strings are improved along the way.
558 lines
17 KiB
Go
558 lines
17 KiB
Go
package client
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import (
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"encoding/hex"
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"errors"
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"fmt"
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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/crypto/hash"
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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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)
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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 = block.New(c.opts.Network)
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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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resp.Network = c.opts.Network
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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.Network = c.opts.Network
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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(c.opts.Network, 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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resp.Network = c.opts.Network
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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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// GetStorageByID returns the stored value, according to the contract ID and the stored key.
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func (c *Client) GetStorageByID(id int32, key []byte) ([]byte, error) {
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return c.getStorage(request.NewRawParams(id, hex.EncodeToString(key)))
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}
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// GetStorageByHash returns the stored value, according to the contract script hash and the stored key.
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func (c *Client) GetStorageByHash(hash util.Uint160, key []byte) ([]byte, error) {
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return c.getStorage(request.NewRawParams(hash.StringLE(), hex.EncodeToString(key)))
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}
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func (c *Client) getStorage(params request.RawParams) ([]byte, error) {
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var resp string
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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) (result.UnclaimedGas, error) {
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var (
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params = request.NewRawParams(address)
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resp result.UnclaimedGas
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)
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if err := c.performRequest("getunclaimedgas", 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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// 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 []byte, signers []transaction.Signer) (*result.Invoke, error) {
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var p = request.NewRawParams(hex.EncodeToString(script))
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return c.invokeSomething("invokescript", p, signers)
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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(contract util.Uint160, operation string, params []smartcontract.Parameter, signers []transaction.Signer) (*result.Invoke, error) {
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var p = request.NewRawParams(contract.StringLE(), operation, params)
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return c.invokeSomething("invokefunction", p, signers)
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}
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// invokeSomething is an inner wrapper for Invoke* functions
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func (c *Client) invokeSomething(method string, p request.RawParams, signers []transaction.Signer) (*result.Invoke, error) {
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var resp = new(result.Invoke)
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if signers != nil {
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p.Values = append(p.Values, signers)
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}
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if err := c.performRequest(method, p, resp); err != nil {
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// Retry with old-fashioned hashes (see neo/neo-modules#260).
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if signers != nil {
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var hashes = make([]util.Uint160, len(signers))
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for i := range signers {
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hashes[i] = signers[i].Account
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}
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p.Values[len(p.Values)-1] = hashes
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err = c.performRequest(method, p, resp)
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if err == nil {
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return resp, nil
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}
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}
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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) (util.Uint256, error) {
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var (
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params = request.NewRawParams(hex.EncodeToString(rawTX.Bytes()))
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resp = new(result.RelayResult)
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)
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if err := c.performRequest("sendrawtransaction", params, resp); err != nil {
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return util.Uint256{}, err
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}
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return resp.Hash, 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) (util.Uint256, error) {
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var (
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params request.RawParams
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resp = new(result.RelayResult)
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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 util.Uint256{}, 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 util.Uint256{}, err
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}
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return resp.Hash, 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 int64, netfee util.Fixed8, cosigners []transaction.Signer) (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(c.opts.Network, script, sysfee)
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tx.SystemFee = sysfee
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addr, err := address.StringToUint160(acc.Address)
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if err != nil {
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return txHash, fmt.Errorf("failed to get address: %w", err)
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}
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tx.Signers = getSigners(addr, cosigners)
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validUntilBlock, err := c.CalculateValidUntilBlock()
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if err != nil {
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return txHash, fmt.Errorf("failed to add validUntilBlock to transaction: %w", err)
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}
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tx.ValidUntilBlock = validUntilBlock
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err = c.AddNetworkFee(tx, int64(netfee), acc)
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if err != nil {
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return txHash, fmt.Errorf("failed to add network fee: %w", err)
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}
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if err = acc.SignTx(tx); err != nil {
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return txHash, fmt.Errorf("failed to sign tx: %w", err)
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}
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txHash = tx.Hash()
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actualHash, err := c.SendRawTransaction(tx)
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if err != nil {
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return txHash, fmt.Errorf("failed to send tx: %w", err)
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}
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if !actualHash.Equals(txHash) {
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return actualHash, fmt.Errorf("sent and actual tx hashes mismatch:\n\tsent: %v\n\tactual: %v", txHash.StringLE(), actualHash.StringLE())
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}
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return txHash, nil
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}
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// getSigners returns an array of transaction signers from given sender and cosigners.
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// If cosigners list already contains sender, the sender will be placed at the start of
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// the list.
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func getSigners(sender util.Uint160, cosigners []transaction.Signer) []transaction.Signer {
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s := transaction.Signer{
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Account: sender,
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Scopes: transaction.FeeOnly,
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}
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for i, c := range cosigners {
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if c.Account == sender {
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if i == 0 {
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return cosigners
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}
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s.Scopes = c.Scopes
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cosigners = append(cosigners[:i], cosigners[i+1:]...)
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break
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}
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}
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return append([]transaction.Signer{s}, cosigners...)
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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")
|
|
}
|
|
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
|
|
}
|