Golang Hash.SetBytes方法代码示例

// pushDirBlockMsg sends a dir block message for the provided block hash to the
// connected peer.  An error is returned if the block hash is not known.
func (p *peer) pushDirBlockMsg(sha *wire.ShaHash, doneChan, waitChan chan struct{}) error {
	commonhash := new(common.Hash)
	commonhash.SetBytes(sha.Bytes())
	blk, err := db.FetchDBlockByHash(commonhash)

	if err != nil {
		peerLog.Tracef("Unable to fetch requested dir block sha %v: %v",
			sha, err)

		if doneChan != nil {
			doneChan <- struct{}{}
		}
		return err
	}

	// Once we have fetched data wait for any previous operation to finish.
	if waitChan != nil {
		<-waitChan
	}

	// We only send the channel for this message if we aren't sending(sha)
	// an inv straight after.
	var dc chan struct{}
	sendInv := p.continueHash != nil && p.continueHash.IsEqual(sha)
	if !sendInv {
		dc = doneChan
	}
	msg := wire.NewMsgDirBlock()
	msg.DBlk = blk
	p.QueueMessage(msg, dc) //blk.MsgBlock(), dc)

	// When the peer requests the final block that was advertised in
	// response to a getblocks message which requested more blocks than
	// would fit into a single message, send it a new inventory message
	// to trigger it to issue another getblocks message for the next
	// batch of inventory.
	if p.continueHash != nil && p.continueHash.IsEqual(sha) {
		peerLog.Debug("continueHash: " + spew.Sdump(sha))
		// Sleep for 5 seconds for the peer to catch up
		time.Sleep(5 * time.Second)

		//
		// Note: Rather than the latest block height, we should pass
		// the last block height of this batch of wire.MaxBlockLocatorsPerMsg
		// to signal this is the end of the batch and
		// to trigger a client to send a new GetDirBlocks message
		//
		//hash, _, err := db.FetchBlockHeightCache()
		//if err == nil {
		invMsg := wire.NewMsgDirInvSizeHint(1)
		iv := wire.NewInvVect(wire.InvTypeFactomDirBlock, sha) //hash)
		invMsg.AddInvVect(iv)
		p.QueueMessage(invMsg, doneChan)
		p.continueHash = nil
		//} else if doneChan != nil {
		if doneChan != nil {
			doneChan <- struct{}{}
		}
	}
	return nil
}

func toHash(txHash *wire.ShaHash) *common.Hash {
	h := new(common.Hash)
	h.SetBytes(txHash.Bytes())
	return h
}

// Convert wire.ShaHash into factom.common.Hash
func (hash *ShaHash) ToFactomHash() *common.Hash {
	commonhash := new(common.Hash)
	commonhash.SetBytes(hash.Bytes())

	return commonhash
}