func (c *Client) GetBlockHash(blockHeight int64) (*chainhash.Hash, error) {
	return c.GetBlockHashAsync(blockHeight).Receive()
}
GetBlockHash returns the hash of the block in the best block chain at the
given height.
package rpcclient
import (
	"bytes"
	"encoding/hex"
	"encoding/json"
	"github.com/btcsuite/btcd/chaincfg/chainhash"
	"github.com/btcsuite/btcd/wire"
	"github.com/stevenroose/go-bitcoin-core-rpc/btcjson"
)
type FutureGetBestBlockHashResult chan *response
func (r FutureGetBestBlockHashResult) Receive() (*chainhash.Hash, error) {
	res, err := receiveFuture(r)
	if err != nil {
		return nil, err
	}
	var txHashStr string
	err = json.Unmarshal(res, &txHashStr)
	if err != nil {
		return nil, err
	}
	return chainhash.NewHashFromStr(txHashStr)
}
func (c *Client) GetBestBlockHashAsync() FutureGetBestBlockHashResult {
	cmd := btcjson.NewGetBestBlockHashCmd()
	return c.sendCmd(cmd)
}
func (c *Client) GetBestBlockHash() (*chainhash.Hash, error) {
	return c.GetBestBlockHashAsync().Receive()
}
type FutureEstimateSmartFeeResult chan *response
func (r FutureEstimateSmartFeeResult) Receive() (*btcjson.EstimateSmartFeeResult, error) {
	res, err := receiveFuture(r)
	if err != nil {
		return nil, err
	}
	var estimateSmartFee btcjson.EstimateSmartFeeResult
	if err := json.Unmarshal(res, &estimateSmartFee); err != nil {
		return nil, err
	}
	return &estimateSmartFee, nil
}
func (c *Client) EstimateSmartFeeAsync(confTarget uint32, estimateMode btcjson.EstimateMode) FutureEstimateSmartFeeResult {
	cmd := btcjson.NewEstimateSmartFeeCmd(confTarget, estimateMode)
	return c.sendCmd(cmd)
}
func (c *Client) EstimateSmartFee(confTarget uint32) (*btcjson.EstimateSmartFeeResult, error) {
	return c.EstimateSmartFeeWithMode(confTarget, btcjson.UnsetEstimeMode)
}
func (c *Client) EstimateSmartFeeWithMode(confTarget uint32, estimateMode btcjson.EstimateMode) (*btcjson.EstimateSmartFeeResult, error) {
	return c.EstimateSmartFeeAsync(confTarget, estimateMode).Receive()
}
type FutureGetBlockResult chan *response
func (r FutureGetBlockResult) Receive() (*wire.MsgBlock, error) {
	res, err := receiveFuture(r)
	if err != nil {
		return nil, err
	}
	var blockHex string
	err = json.Unmarshal(res, &blockHex)
	if err != nil {
		return nil, err
	}
	serializedBlock, err := hex.DecodeString(blockHex)
	if err != nil {
		return nil, err
	}
	var msgBlock wire.MsgBlock
	err = msgBlock.Deserialize(bytes.NewReader(serializedBlock))
	if err != nil {
		return nil, err
	}
	return &msgBlock, nil
}
func (c *Client) GetBlockAsync(blockHash *chainhash.Hash) FutureGetBlockResult {
	hash := ""
	if blockHash != nil {
		hash = blockHash.String()
	}
	cmd := btcjson.NewGetBlockCmd(hash, btcjson.Bool(false), nil)
	return c.sendCmd(cmd)
}
func (c *Client) GetBlock(blockHash *chainhash.Hash) (*wire.MsgBlock, error) {
	return c.GetBlockAsync(blockHash).Receive()
}
type FutureGetBlockVerboseResult chan *response
func (r FutureGetBlockVerboseResult) Receive() (*btcjson.GetBlockVerboseResult, error) {
	res, err := receiveFuture(r)
	if err != nil {
		return nil, err
	}
	var blockResult btcjson.GetBlockVerboseResult
	err = json.Unmarshal(res, &blockResult)
	if err != nil {
		return nil, err
	}
	return &blockResult, nil
}
func (c *Client) GetBlockVerboseAsync(blockHash *chainhash.Hash) FutureGetBlockVerboseResult {
	hash := ""
	if blockHash != nil {
		hash = blockHash.String()
	}
	cmd := btcjson.NewGetBlockCmd(hash, btcjson.Bool(true), nil)
	return c.sendCmd(cmd)
}
func (c *Client) GetBlockVerbose(blockHash *chainhash.Hash) (*btcjson.GetBlockVerboseResult, error) {
	return c.GetBlockVerboseAsync(blockHash).Receive()
}
func (c *Client) GetBlockVerboseTxAsync(blockHash *chainhash.Hash) FutureGetBlockVerboseResult {
	hash := ""
	if blockHash != nil {
		hash = blockHash.String()
	}
	cmd := btcjson.NewGetBlockCmd(hash, btcjson.Bool(true), btcjson.Bool(true))
	return c.sendCmd(cmd)
}
func (c *Client) GetBlockVerboseTx(blockHash *chainhash.Hash) (*btcjson.GetBlockVerboseResult, error) {
	return c.GetBlockVerboseTxAsync(blockHash).Receive()
}
type FutureGetBlockCountResult chan *response
func (r FutureGetBlockCountResult) Receive() (int64, error) {
	res, err := receiveFuture(r)
	if err != nil {
		return 0, err
	}
	var count int64
	err = json.Unmarshal(res, &count)
	if err != nil {
		return 0, err
	}
	return count, nil
}
func (c *Client) GetBlockCountAsync() FutureGetBlockCountResult {
	cmd := btcjson.NewGetBlockCountCmd()
	return c.sendCmd(cmd)
}
func (c *Client) GetBlockCount() (int64, error) {
	return c.GetBlockCountAsync().Receive()
}
type FutureGetDifficultyResult chan *response
func (r FutureGetDifficultyResult) Receive() (float64, error) {
	res, err := receiveFuture(r)
	if err != nil {
		return 0, err
	}
	var difficulty float64
	err = json.Unmarshal(res, &difficulty)
	if err != nil {
		return 0, err
	}
	return difficulty, nil
}
func (c *Client) GetDifficultyAsync() FutureGetDifficultyResult {
	cmd := btcjson.NewGetDifficultyCmd()
	return c.sendCmd(cmd)
}
func (c *Client) GetDifficulty() (float64, error) {
	return c.GetDifficultyAsync().Receive()
}
type FutureGetBlockChainInfoResult chan *response
func (r FutureGetBlockChainInfoResult) Receive() (*btcjson.GetBlockChainInfoResult, error) {
	res, err := receiveFuture(r)
	if err != nil {
		return nil, err
	}
	var chainInfo btcjson.GetBlockChainInfoResult
	if err := json.Unmarshal(res, &chainInfo); err != nil {
		return nil, err
	}
	return &chainInfo, nil
}
func (c *Client) GetBlockChainInfoAsync() FutureGetBlockChainInfoResult {
	cmd := btcjson.NewGetBlockChainInfoCmd()
	return c.sendCmd(cmd)
}
func (c *Client) GetBlockChainInfo() (*btcjson.GetBlockChainInfoResult, error) {
	return c.GetBlockChainInfoAsync().Receive()
}
type FutureGetBlockHashResult chan *response
func (r FutureGetBlockHashResult) Receive() (*chainhash.Hash, error) {
	res, err := receiveFuture(r)
	if err != nil {
		return nil, err
	}
	var txHashStr string
	err = json.Unmarshal(res, &txHashStr)
	if err != nil {
		return nil, err
	}
	return chainhash.NewHashFromStr(txHashStr)
}
func (c *Client) GetBlockHashAsync(blockHeight int64) FutureGetBlockHashResult {
	cmd := btcjson.NewGetBlockHashCmd(blockHeight)
	return c.sendCmd(cmd)
}