Golang Hash.String方法代碼示例

// Uses the txid of the target funding transaction and asks blockchain.info's
// api for information (in json) related to that transaction.
func lookupTxid(hash *chainhash.Hash) (*blockChainInfoTx, error) {
	url := "https://blockchain.info/rawtx/" + hash.String()
	resp, err := http.Get(url)
	if err != nil {
		return nil, fmt.Errorf("Tx Lookup failed: %v", err)
	}

	defer resp.Body.Close()

	b, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("TxInfo read failed: %s", err)
	}

	txinfo := &blockChainInfoTx{}
	err = json.Unmarshal(b, txinfo)
	if err != nil {
		return nil, err
	}

	if txinfo.Ver != 1 {
		return nil, fmt.Errorf("Blockchain.info's response seems bad: %v", txinfo)
	}

	return txinfo, nil
}

// GetBlockAsync returns an instance of a type that can be used to get the
// result of the RPC at some future time by invoking the Receive function on the
// returned instance.
//
// See GetBlock for the blocking version and more details.
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)
}

// GetTxOutAsync returns an instance of a type that can be used to get
// the result of the RPC at some future time by invoking the Receive function on
// the returned instance.
//
// See GetTxOut for the blocking version and more details.
func (c *Client) GetTxOutAsync(txHash *chainhash.Hash, index uint32, mempool bool) FutureGetTxOutResult {
	hash := ""
	if txHash != nil {
		hash = txHash.String()
	}

	cmd := btcjson.NewGetTxOutCmd(hash, index, &mempool)
	return c.sendCmd(cmd)
}

// GetBlockHeaderVerboseAsync returns an instance of a type that can be used to get the
// result of the RPC at some future time by invoking the Receive function on the
// returned instance.
//
// See GetBlockHeader for the blocking version and more details.
func (c *Client) GetBlockHeaderVerboseAsync(blockHash *chainhash.Hash) FutureGetBlockHeaderVerboseResult {
	hash := ""
	if blockHash != nil {
		hash = blockHash.String()
	}

	cmd := btcjson.NewGetBlockHeaderCmd(hash, btcjson.Bool(true))
	return c.sendCmd(cmd)
}

// GetRawTransactionAsync returns an instance of a type that can be used to get
// the result of the RPC at some future time by invoking the Receive function on
// the returned instance.
//
// See GetRawTransaction for the blocking version and more details.
func (c *Client) GetRawTransactionAsync(txHash *chainhash.Hash) FutureGetRawTransactionResult {
	hash := ""
	if txHash != nil {
		hash = txHash.String()
	}

	cmd := btcjson.NewGetRawTransactionCmd(hash, btcjson.Int(0))
	return c.sendCmd(cmd)
}

// RescanEndBlockAsync returns an instance of a type that can be used to get
// the result of the RPC at some future time by invoking the Receive function on
// the returned instance.
//
// See RescanEndBlock for the blocking version and more details.
//
// NOTE: This is a btcd extension and requires a websocket connection.
func (c *Client) RescanEndBlockAsync(startBlock *chainhash.Hash,
	addresses []btcutil.Address, outpoints []*wire.OutPoint,
	endBlock *chainhash.Hash) FutureRescanResult {

	// Not supported in HTTP POST mode.
	if c.config.HTTPPostMode {
		return newFutureError(ErrWebsocketsRequired)
	}

	// Ignore the notification if the client is not interested in
	// notifications.
	if c.ntfnHandlers == nil {
		return newNilFutureResult()
	}

	// Convert block hashes to strings.
	var startBlockHashStr, endBlockHashStr string
	if startBlock != nil {
		startBlockHashStr = startBlock.String()
	}
	if endBlock != nil {
		endBlockHashStr = endBlock.String()
	}

	// Convert addresses to strings.
	addrs := make([]string, 0, len(addresses))
	for _, addr := range addresses {
		addrs = append(addrs, addr.String())
	}

	// Convert outpoints.
	ops := make([]btcjson.OutPoint, 0, len(outpoints))
	for _, op := range outpoints {
		ops = append(ops, newOutPointFromWire(op))
	}

	cmd := btcjson.NewRescanCmd(startBlockHashStr, addrs, ops,
		&endBlockHashStr)
	return c.sendCmd(cmd)
}