Golang Db.FetchBlockShaByHeight方法代码示例

func verifyChain(db btcdb.Db, level, depth int32) error {
	_, curheight64, err := db.NewestSha()
	if err != nil {
		rpcsLog.Errorf("Verify is unable to fetch current block "+
			"height: %v", err)
	}

	curheight := int32(curheight64)

	if depth > curheight {
		depth = curheight
	}

	for height := curheight; height > (curheight - depth); height-- {
		// Level 0 just looks up the block.
		sha, err := db.FetchBlockShaByHeight(int64(height))
		if err != nil {
			rpcsLog.Errorf("Verify is unable to fetch block at "+
				"height %d: %v", height, err)
			return err
		}

		block, err := db.FetchBlockBySha(sha)
		if err != nil {
			rpcsLog.Errorf("Verify is unable to fetch block at "+
				"sha %v height %d: %v", sha, height, err)
			return err
		}

		// Level 1 does basic chain sanity checks.
		if level > 0 {
			err := btcchain.CheckBlockSanity(block,
				activeNetParams.powLimit)
			if err != nil {
				rpcsLog.Errorf("Verify is unable to "+
					"validate block at sha %v height "+
					"%d: %v", sha, height, err)
				return err
			}
		}
	}
	rpcsLog.Infof("Chain verify completed successfully")

	return nil
}

func DumpBlock(db btcdb.Db, height int64, fo io.Writer, rflag bool, fflag bool, tflag bool) error {
	sha, err := db.FetchBlockShaByHeight(height)

	if err != nil {
		return err
	}
	blk, err := db.FetchBlockBySha(sha)
	if err != nil {
		log.Warnf("Failed to fetch block %v, err %v", sha, err)
		return err
	}
	rblk, err := blk.Bytes()
	blkid := blk.Height()

	if rflag {
		log.Infof("Block %v depth %v %v", sha, blkid, spew.Sdump(rblk))
	}

	mblk := blk.MsgBlock()
	if fflag {
		log.Infof("Block %v depth %v %v", sha, blkid, spew.Sdump(mblk))
	}
	if tflag {
		log.Infof("Num transactions %v", len(mblk.Transactions))
		for i, tx := range mblk.Transactions {
			txsha, err := tx.TxSha()
			if err != nil {
				continue
			}
			log.Infof("tx %v: %v", i, &txsha)

		}
	}
	if fo != nil {
		// generate and write header values
		binary.Write(fo, binary.LittleEndian, uint32(btcwire.MainNet))
		binary.Write(fo, binary.LittleEndian, uint32(len(rblk)))

		// write block
		fo.Write(rblk)
	}
	return nil
}

func fetch(db btcdb.Db, rd *rData) error {
	sha, err := db.FetchBlockShaByHeight(rd.in.H)
	if err != nil {
		return fmt.Errorf("failed FetchBlockShaByHeight(%v): %v\n", rd.in.H, err)
	}
	blk, err := db.FetchBlockBySha(sha)
	if err != nil {
		return fmt.Errorf("failed FetchBlockBySha(%v) - h %v: %v\n", sha, rd.in.H, err)
	}

	tx := blk.Transactions()[rd.in.Tx]

	rd.blkSha = sha
	rd.blk = blk
	rd.tx = tx
	rd.txInIndex = rd.in.TxIn
	rd.txIn = tx.MsgTx().TxIn[rd.in.TxIn]

	txPrevList, err := db.FetchTxBySha(&rd.txIn.PreviousOutPoint.Hash)
	if err != nil {
		return fmt.Errorf("failed FetchTxBySha(%v) - h %v: %v\n",
			rd.txIn.PreviousOutPoint.Hash, rd.in.H, err)
	}

	if len(txPrevList) != 1 {
		return fmt.Errorf("not single FetchTxBySha(%v) - h %v: %v\n",
			rd.txIn.PreviousOutPoint.Hash, rd.in.H, len(txPrevList))
	}

	blkPrev, err := db.FetchBlockBySha(txPrevList[0].BlkSha)
	if err != nil {
		return fmt.Errorf("failed prev FetchBlockBySha(%v) - h %v: %v\n",
			txPrevList[0].BlkSha, rd.in.H, err)
	}

	rd.txPrev = txPrevList[0]
	rd.txPrevOutIndex = rd.txIn.PreviousOutPoint.Index
	rd.txPrevOut = rd.txPrev.Tx.TxOut[rd.txPrevOutIndex]
	rd.blkPrev = blkPrev

	return nil
}

func getSha(db btcdb.Db, str string) (btcwire.ShaHash, error) {
	argtype, idx, sha, err := parsesha(str)
	if err != nil {
		log.Warnf("unable to decode [%v] %v", str, err)
		return btcwire.ShaHash{}, err
	}

	switch argtype {
	case ArgSha:
		// nothing to do
	case ArgHeight:
		sha, err = db.FetchBlockShaByHeight(idx)
		if err != nil {
			return btcwire.ShaHash{}, err
		}
	}
	if sha == nil {
		fmt.Printf("wtf sha is nil but err is %v", err)
	}
	return *sha, nil
}

func getSignatures(maxHeigth int64, log btclog.Logger, db btcdb.Db) chan *rData {
	heigthChan := make(chan int64)
	blockChan := make(chan *btcutil.Block)
	sigChan := make(chan *rData)

	go func() {
		for h := int64(0); h < maxHeigth; h++ {
			heigthChan <- h
		}

		close(heigthChan)
	}()

	var blockWg sync.WaitGroup
	for i := 0; i <= 10; i++ {
		blockWg.Add(1)
		go func() {
			for h := range heigthChan {
				sha, err := db.FetchBlockShaByHeight(h)
				if err != nil {
					log.Warnf("failed FetchBlockShaByHeight(%v): %v", h, err)
					return
				}
				blk, err := db.FetchBlockBySha(sha)
				if err != nil {
					log.Warnf("failed FetchBlockBySha(%v) - h %v: %v", sha, h, err)
					return
				}

				blockChan <- blk
			}
			blockWg.Done()
		}()
	}
	go func() {
		blockWg.Wait()
		close(blockChan)
	}()

	var sigWg sync.WaitGroup
	for i := 0; i <= 10; i++ {
		sigWg.Add(1)
		go func() {
			for blk := range blockChan {
				mblk := blk.MsgBlock()
				for i, tx := range mblk.Transactions {
					if btcchain.IsCoinBase(btcutil.NewTx(tx)) {
						continue
					}

					for t, txin := range tx.TxIn {
						dataSlice, err := btcscript.PushedData(txin.SignatureScript)
						if err != nil {
							continue
						}

						for d, data := range dataSlice {
							signature, err := btcec.ParseSignature(data, btcec.S256())
							if err != nil {
								continue
							}

							sigChan <- &rData{
								sig:  signature,
								H:    blk.Height(),
								Tx:   i,
								TxIn: t,
								Data: d,
							}
						}
					}
				}
			}
			sigWg.Done()
		}()
	}
	go func() {
		sigWg.Wait()
		close(sigChan)
	}()

	return sigChan
}

func testFetch(t *testing.T, db btcdb.Db, shas []btcwire.ShaHash,
	sync string) {

	// Test the newest sha is what we expect and call it twice to ensure
	// caching is working working properly.
	numShas := int64(len(shas))
	newestSha := shas[numShas-1]
	newestBlockID := int64(numShas)
	testNewestSha(t, db, newestSha, newestBlockID, sync)
	testNewestSha(t, db, newestSha, newestBlockID, sync+" cached")

	for i, sha := range shas {
		// Add one for genesis block skew.
		i = i + 1

		// Ensure the sha exists in the db as expected.
		if !db.ExistsSha(&sha) {
			t.Errorf("testSha %d doesn't exists (%s)", i, sync)
			break
		}

		// Fetch the sha from the db and ensure all fields are expected
		// values.
		buf, pver, idx, err := sqlite3.FetchSha(db, &sha)
		if err != nil {
			t.Errorf("Failed to fetch testSha %d (%s)", i, sync)
		}
		if !bytes.Equal(zeroBlock, buf) {
			t.Errorf("testSha %d incorrect block return (%s)", i,
				sync)
		}
		if pver != 1 {
			t.Errorf("pver is %d and not 1 for testSha %d (%s)",
				pver, i, sync)
		}
		if idx != int64(i) {
			t.Errorf("index isn't as expected %d vs %d (%s)",
				idx, i, sync)
		}

		// Fetch the sha by index and ensure it matches.
		tsha, err := db.FetchBlockShaByHeight(int64(i))
		if err != nil {
			t.Errorf("can't fetch sha at index %d: %v", i, err)
			continue
		}
		if !tsha.IsEqual(&sha) {
			t.Errorf("sha for index %d isn't shas[%d]", i, i)
		}
	}

	endBlockID := numShas + 1
	midBlockID := endBlockID / 2
	fetchIdxTests := []fetchIdxTest{
		// All shas.
		{1, btcdb.AllShas, shas, "fetch all shas"},

		//// All shas using known bounds.
		{1, endBlockID, shas, "fetch all shas2"},

		// Partial list starting at beginning.
		{1, midBlockID, shas[:midBlockID-1], "fetch first half"},

		// Partial list ending at end.
		{midBlockID, endBlockID, shas[midBlockID-1 : endBlockID-1],
			"fetch second half"},

		// Nonexistent off the end.
		{endBlockID, endBlockID * 2, []btcwire.ShaHash{},
			"fetch nonexistent"},
	}

	for _, test := range fetchIdxTests {
		t.Logf("numSha: %d - Fetch from %d to %d\n", numShas, test.start, test.end)
		if shalist, err := db.FetchHeightRange(test.start, test.end); err == nil {
			compareArray(t, shalist, test.exp, test.test, sync)
		} else {
			t.Errorf("failed to fetch index range for %s (%s)",
				test.test, sync)
		}
	}

	// Try and fetch nonexistent sha.
	if db.ExistsSha(&badSha) {
		t.Errorf("nonexistent sha exists (%s)!", sync)
	}
	_, _, _, err := sqlite3.FetchSha(db, &badSha)
	if err == nil {
		t.Errorf("Success when fetching a bad sha! (%s)", sync)
	}
	// XXX if not check to see it is the right value?

	testIterator(t, db, shas, sync)
}