Golang Cmd.MarshalJSON方法代码示例

// marshalAndSend marshals the passed command to JSON-RPC and sends it to the
// server.  It returns a response channel on which the reply will be delivered.
func (c *Client) marshalAndSend(cmd btcjson.Cmd, responseChan chan *response) {
	marshalledJSON, err := cmd.MarshalJSON()
	if err != nil {
		responseChan <- &response{result: nil, err: err}
		return
	}

	log.Tracef("Sending command [%s] with id %d", cmd.Method(), cmd.Id())
	c.sendMessage(marshalledJSON)
}

// NtfnBlockDisconnected handles btcd notifications resulting from
// blocks disconnected from the main chain in the event of a chain
// switch and notifies frontends of the new blockchain height.
func NtfnBlockDisconnected(n btcjson.Cmd) error {
	bdn, ok := n.(*btcws.BlockDisconnectedNtfn)
	if !ok {
		return fmt.Errorf("%v handler: unexpected type", n.Method())
	}
	hash, err := btcwire.NewShaHashFromStr(bdn.Hash)
	if err != nil {
		return fmt.Errorf("%v handler: invalid hash string", n.Method())
	}

	// Rollback Utxo and Tx data stores.
	AcctMgr.Rollback(bdn.Height, hash)

	// Pass notification to frontends too.
	marshaled, _ := n.MarshalJSON()
	allClients <- marshaled

	return nil
}

// NtfnBlockConnected handles btcd notifications resulting from newly
// connected blocks to the main blockchain.
//
// TODO(jrick): Send block time with notification.  This will be used
// to mark wallet files with a possibly-better earliest block height,
// and will greatly reduce rescan times for wallets created with an
// out of sync btcd.
func NtfnBlockConnected(n btcjson.Cmd) error {
	bcn, ok := n.(*btcws.BlockConnectedNtfn)
	if !ok {
		return fmt.Errorf("%v handler: unexpected type", n.Method())
	}
	hash, err := btcwire.NewShaHashFromStr(bcn.Hash)
	if err != nil {
		return fmt.Errorf("%v handler: invalid hash string", n.Method())
	}

	// Update the blockstamp for the newly-connected block.
	bs := &wallet.BlockStamp{
		Height: bcn.Height,
		Hash:   *hash,
	}
	curBlock.Lock()
	curBlock.BlockStamp = *bs
	curBlock.Unlock()

	// btcd notifies btcwallet about transactions first, and then sends
	// the new block notification.  New balance notifications for txs
	// in blocks are therefore sent here after all tx notifications
	// have arrived and finished being processed by the handlers.
	workers := NotifyBalanceRequest{
		block: *hash,
		wg:    make(chan *sync.WaitGroup),
	}
	NotifyBalanceSyncerChans.access <- workers
	if wg := <-workers.wg; wg != nil {
		wg.Wait()
		NotifyBalanceSyncerChans.remove <- *hash
	}
	AcctMgr.BlockNotify(bs)

	// Pass notification to frontends too.
	marshaled, _ := n.MarshalJSON()
	allClients <- marshaled

	return nil
}