Golang ReadBucket.NestedReadBucket方法代码示例

// loadManager returns a new stake manager that results from loading it from
// the passed opened database.  The public passphrase is required to decrypt the
// public keys.
func (s *StakeStore) loadOwnedSStxs(ns walletdb.ReadBucket) error {
	// Regenerate the list of tickets.
	// Perform all database lookups in a read-only view.
	ticketList := make(map[chainhash.Hash]struct{})

	// Open the sstx records database.
	bucket := ns.NestedReadBucket(sstxRecordsBucketName)

	// Store each key sequentially.
	err := bucket.ForEach(func(k []byte, v []byte) error {
		var errNewHash error
		var hash *chainhash.Hash

		hash, errNewHash = chainhash.NewHash(k)
		if errNewHash != nil {
			return errNewHash
		}
		ticketList[*hash] = struct{}{}
		return nil
	})
	if err != nil {
		return err
	}

	s.ownedSStxs = ticketList
	return nil
}

// rangeUnminedTransactions executes the function f with TxDetails for every
// unmined transaction.  f is not executed if no unmined transactions exist.
// Error returns from f (if any) are propigated to the caller.  Returns true
// (signaling breaking out of a RangeTransactions) iff f executes and returns
// true.
func (s *Store) rangeUnminedTransactions(ns walletdb.ReadBucket, f func([]TxDetails) (bool, error)) (bool, error) {
	var details []TxDetails
	err := ns.NestedReadBucket(bucketUnmined).ForEach(func(k, v []byte) error {
		if len(k) < 32 {
			str := fmt.Sprintf("%s: short key (expected %d "+
				"bytes, read %d)", bucketUnmined, 32, len(k))
			return storeError(ErrData, str, nil)
		}

		var txHash chainhash.Hash
		copy(txHash[:], k)
		detail, err := s.unminedTxDetails(ns, &txHash, v)
		if err != nil {
			return err
		}

		// Because the key was created while foreach-ing over the
		// bucket, it should be impossible for unminedTxDetails to ever
		// successfully return a nil details struct.
		details = append(details, *detail)
		return nil
	})
	if err == nil && len(details) > 0 {
		return f(details)
	}
	return false, err
}

func (s *Store) unminedTxHashes(ns walletdb.ReadBucket) ([]*chainhash.Hash, error) {
	var hashes []*chainhash.Hash
	err := ns.NestedReadBucket(bucketUnmined).ForEach(func(k, v []byte) error {
		hash := new(chainhash.Hash)
		err := readRawUnminedHash(k, hash)
		if err == nil {
			hashes = append(hashes, hash)
		}
		return err
	})
	return hashes, err
}

// fetchSStxRecord retrieves a tx record from the sstx records bucket
// with the given hash.
func fetchSStxRecord(ns walletdb.ReadBucket, hash *chainhash.Hash) (*sstxRecord, error) {
	bucket := ns.NestedReadBucket(sstxRecordsBucketName)

	key := hash.Bytes()
	val := bucket.Get(key)
	if val == nil {
		str := fmt.Sprintf("missing sstx record for hash '%s'", hash.String())
		return nil, stakeStoreError(ErrSStxNotFound, str, nil)
	}

	return deserializeSStxRecord(val)
}

// fetchMeta fetches a v from a k in the meta bucket.
func fetchMeta(ns walletdb.ReadBucket, key []byte) (int32, error) {
	bucket := ns.NestedReadBucket(metaBucketName)

	val := bucket.Get(key)
	// Return 0 if the metadata is uninitialized
	if val == nil {
		return 0, nil
	}
	if val == nil {
		str := fmt.Sprintf("meta key not found %s", key)
		return 0, stakeStoreError(ErrDatabase, str, nil)
	}

	return int32(byteOrder.Uint32(val)), nil
}

// dumpSSRtxTickets fetches the entire list of tickets spent as revocations
// byt this wallet.
func (s *StakeStore) dumpSSRtxTickets(ns walletdb.ReadBucket) ([]chainhash.Hash, error) {
	var ticketList []chainhash.Hash

	// Open the revocation records database.
	bucket := ns.NestedReadBucket(ssrtxRecordsBucketName)

	// Store each hash sequentially.
	err := bucket.ForEach(func(k []byte, v []byte) error {
		ticket, errDeser := chainhash.NewHash(k)
		if errDeser != nil {
			return errDeser
		}

		ticketList = append(ticketList, *ticket)
		return nil
	})
	return ticketList, err
}

// dumpSSRtxHashes fetches the entire list of revocations generated by this
// wallet.
func (s *StakeStore) dumpSSRtxHashes(ns walletdb.ReadBucket) ([]chainhash.Hash, error) {
	var revocationList []chainhash.Hash

	// Open the revocation records database.
	bucket := ns.NestedReadBucket(ssrtxRecordsBucketName)

	// Store each hash sequentially.
	err := bucket.ForEach(func(k []byte, v []byte) error {
		rec, errDeser := deserializeSSRtxRecord(v)
		if errDeser != nil {
			return errDeser
		}

		revocationList = append(revocationList, rec.txHash)
		return nil
	})
	return revocationList, err
}

// fetchStakePoolUserTickets retrieves pool user tickets from the meta bucket with
// the given hash.
func fetchStakePoolUserTickets(ns walletdb.ReadBucket,
	scriptHash [20]byte) ([]*PoolTicket, error) {

	bucket := ns.NestedReadBucket(metaBucketName)

	key := make([]byte, stakePoolTicketsPrefixSize+scriptHashSize)
	copy(key[0:stakePoolTicketsPrefixSize], stakePoolTicketsPrefix)
	copy(key[stakePoolTicketsPrefixSize:stakePoolTicketsPrefixSize+scriptHashSize],
		scriptHash[:])
	val := bucket.Get(key)
	if val == nil {
		str := fmt.Sprintf("missing pool user ticket records for hash '%x'",
			scriptHash)
		return nil, stakeStoreError(ErrPoolUserTicketsNotFound, str, nil)
	}

	return deserializeUserTickets(val)
}

// fetchSStxRecordVoteBits fetches an individual ticket's intended voteBits
// which are used to override the default voteBits when voting.
func fetchSStxRecordVoteBits(ns walletdb.ReadBucket, hash *chainhash.Hash) (bool,
	stake.VoteBits, error) {

	bucket := ns.NestedReadBucket(sstxRecordsBucketName)

	key := hash.Bytes()
	val := bucket.Get(key)
	if val == nil {
		str := fmt.Sprintf("missing sstx record for hash '%s'", hash.String())
		return false, stake.VoteBits{}, stakeStoreError(ErrSStxNotFound, str, nil)
	}
	valLen := len(val)
	valCopy := make([]byte, valLen, valLen)
	copy(valCopy, val)

	// Move the cursor to the voteBits position and rewrite it.
	curPos := 0
	curPos += int64Size
	curPos += int32Size

	// Read the intended votebits length (uint8). If it is unset, return now.
	// Check it for sanity.
	voteBitsLen := uint8(val[curPos])
	if voteBitsLen == 0 {
		return false, stake.VoteBits{}, nil
	}
	if voteBitsLen < 2 || voteBitsLen > stake.MaxSingleBytePushLength {
		str := fmt.Sprintf("corrupt votebits length '%v'", voteBitsLen)
		return false, stake.VoteBits{}, stakeStoreError(ErrData, str, nil)
	}
	curPos += int8Size

	// Read the first two bytes for the intended votebits.
	voteBits := byteOrder.Uint16(valCopy[curPos : curPos+int16Size])
	curPos += int16Size

	// Retrieve the extended vote bits.
	voteBitsExt := make([]byte, voteBitsLen-int16Size)
	copy(voteBitsExt[:], valCopy[curPos:(curPos+int(voteBitsLen)-int16Size)])

	return true, stake.VoteBits{Bits: voteBits, ExtendedBits: voteBitsExt}, nil
}

func (s *Store) unminedTxRecords(ns walletdb.ReadBucket) (map[chainhash.Hash]*TxRecord, error) {
	unmined := make(map[chainhash.Hash]*TxRecord)
	err := ns.NestedReadBucket(bucketUnmined).ForEach(func(k, v []byte) error {
		var txHash chainhash.Hash
		err := readRawUnminedHash(k, &txHash)
		if err != nil {
			return err
		}

		rec := new(TxRecord)
		err = readRawTxRecord(&txHash, v, rec)
		if err != nil {
			return err
		}

		unmined[rec.Hash] = rec
		return nil
	})
	return unmined, err
}

// dumpSSGenHashes fetches and returns the entire list of votes generated by
// this wallet, including votes that were produced but were never included in
// the blockchain.
func (s *StakeStore) dumpSSGenHashes(ns walletdb.ReadBucket) ([]chainhash.Hash, error) {
	var voteList []chainhash.Hash

	// Open the vite records database.
	bucket := ns.NestedReadBucket(ssgenRecordsBucketName)

	// Store each hash sequentially.
	err := bucket.ForEach(func(k []byte, v []byte) error {
		recs, errDeser := deserializeSSGenRecords(v)
		if errDeser != nil {
			return errDeser
		}

		for _, rec := range recs {
			voteList = append(voteList, rec.txHash)
		}
		return nil
	})
	return voteList, err
}

// stakeStoreExists returns whether or not the stake store has already
// been created in the given database namespace.
func stakeStoreExists(ns walletdb.ReadBucket) bool {
	mainBucket := ns.NestedReadBucket(mainBucketName)
	return mainBucket != nil
}

func (s *Store) debugBucketUnspentString(ns walletdb.ReadBucket,
	inclUnmined bool) (string, error) {
	var unspent []*unspentDebugData

	var op wire.OutPoint
	var block Block
	err := ns.NestedReadBucket(bucketUnspent).ForEach(func(k, v []byte) error {
		err := readCanonicalOutPoint(k, &op)
		if err != nil {
			return err
		}
		existsUnmined := false
		if existsRawUnminedInput(ns, k) != nil {
			// Skip including unmined if specified.
			if !inclUnmined {
				return nil
			}
			existsUnmined = true
		}
		err = readUnspentBlock(v, &block)
		if err != nil {
			return err
		}

		thisUnspentOutput := &unspentDebugData{
			op,
			existsUnmined,
			block.Hash,
			block.Height,
		}

		unspent = append(unspent, thisUnspentOutput)
		return nil
	})
	if err != nil {
		if _, ok := err.(Error); ok {
			return "", err
		}
		str := "failed iterating unspent bucket"
		return "", storeError(ErrDatabase, str, err)
	}

	sort.Sort(ByOutpoint(unspent))

	var buffer bytes.Buffer
	str := fmt.Sprintf("Unspent outputs\n\n")
	buffer.WriteString(str)

	// Create a buffer, dump all the data into it, and hash.
	var thumbprintBuf bytes.Buffer
	for _, udd := range unspent {
		str = fmt.Sprintf("Hash: %v, Index: %v, Tree: %v, Unmined: %v, "+
			"Block: %v, Block height: %v\n",
			udd.outPoint.Hash,
			udd.outPoint.Index,
			udd.outPoint.Tree,
			udd.unmined,
			udd.block,
			udd.blockHeight)
		buffer.WriteString(str)
		writeUnspentDebugDataToBuf(&thumbprintBuf, udd)
	}

	unspentHash := chainhash.HashFunc(thumbprintBuf.Bytes())
	unspentThumbprint, err := chainhash.NewHash(unspentHash[:])
	if err != nil {
		return "", err
	}

	str = fmt.Sprintf("\nUnspent outputs thumbprint: %v",
		unspentThumbprint)
	buffer.WriteString(str)

	return buffer.String(), nil
}