Ejemplo n.º 1
0
// 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.Bucket, f func([]TxDetails) (bool, error)) (bool, error) {
	var details []TxDetails
	err := ns.Bucket(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 wire.ShaHash
		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
}
Ejemplo n.º 2
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func putRawUnspent(ns walletdb.Bucket, k, v []byte) error {
	err := ns.Bucket(bucketUnspent).Put(k, v)
	if err != nil {
		str := "cannot put unspent"
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 3
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func deleteRawDebit(ns walletdb.Bucket, k []byte) error {
	err := ns.Bucket(bucketDebits).Delete(k)
	if err != nil {
		str := "failed to delete debit"
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 4
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func putRawTxRecord(ns walletdb.Bucket, k, v []byte) error {
	err := ns.Bucket(bucketTxRecords).Put(k, v)
	if err != nil {
		str := fmt.Sprintf("%s: put failed", bucketTxRecords)
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 5
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func deleteRawUnmined(ns walletdb.Bucket, k []byte) error {
	err := ns.Bucket(bucketUnmined).Delete(k)
	if err != nil {
		str := "failed to delete unmined record"
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 6
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func putRawUnmined(ns walletdb.Bucket, k, v []byte) error {
	err := ns.Bucket(bucketUnmined).Put(k, v)
	if err != nil {
		str := "failed to put unmined record"
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 7
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func putRawCredit(ns walletdb.Bucket, k, v []byte) error {
	err := ns.Bucket(bucketCredits).Put(k, v)
	if err != nil {
		str := "failed to put credit"
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 8
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func fetchTxRecord(ns walletdb.Bucket, txHash *wire.ShaHash, block *Block) (*TxRecord, error) {
	k := keyTxRecord(txHash, block)
	v := ns.Bucket(bucketTxRecords).Get(k)

	rec := new(TxRecord)
	err := readRawTxRecord(txHash, v, rec)
	return rec, err
}
Ejemplo n.º 9
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func putRawBlockRecord(ns walletdb.Bucket, k, v []byte) error {
	err := ns.Bucket(bucketBlocks).Put(k, v)
	if err != nil {
		str := "failed to store block"
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 10
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func fetchBlockTime(ns walletdb.Bucket, height int32) (time.Time, error) {
	k := keyBlockRecord(height)
	v := ns.Bucket(bucketBlocks).Get(k)
	if len(v) < 44 {
		str := fmt.Sprintf("%s: short read (expected %d bytes, read %d)",
			bucketBlocks, 44, len(v))
		return time.Time{}, storeError(ErrData, str, nil)
	}
	return time.Unix(int64(byteOrder.Uint64(v[32:40])), 0), nil
}
Ejemplo n.º 11
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func putUnspent(ns walletdb.Bucket, outPoint *wire.OutPoint, block *Block) error {
	k := canonicalOutPoint(&outPoint.Hash, outPoint.Index)
	v := valueUnspent(block)
	err := ns.Bucket(bucketUnspent).Put(k, v)
	if err != nil {
		str := "cannot put unspent"
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 12
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// latestTxRecord searches for the newest recorded mined transaction record with
// a matching hash.  In case of a hash collision, the record from the newest
// block is returned.  Returns (nil, nil) if no matching transactions are found.
func latestTxRecord(ns walletdb.Bucket, txHash *wire.ShaHash) (k, v []byte) {
	prefix := txHash[:]
	c := ns.Bucket(bucketTxRecords).Cursor()
	ck, cv := c.Seek(prefix)
	var lastKey, lastVal []byte
	for bytes.HasPrefix(ck, prefix) {
		lastKey, lastVal = ck, cv
		ck, cv = c.Next()
	}
	return lastKey, lastVal
}
Ejemplo n.º 13
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func (s *Store) unminedTxHashes(ns walletdb.Bucket) ([]*wire.ShaHash, error) {
	var hashes []*wire.ShaHash
	err := ns.Bucket(bucketUnmined).ForEach(func(k, v []byte) error {
		hash := new(wire.ShaHash)
		err := readRawUnminedHash(k, hash)
		if err == nil {
			hashes = append(hashes, hash)
		}
		return err
	})
	return hashes, err
}
Ejemplo n.º 14
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// spendRawCredit marks the credit with a given key as mined at some particular
// block as spent by the input at some transaction incidence.  The debited
// amount is returned.
func spendCredit(ns walletdb.Bucket, k []byte, spender *indexedIncidence) (btcutil.Amount, error) {
	v := ns.Bucket(bucketCredits).Get(k)
	newv := make([]byte, 81)
	copy(newv, v)
	v = newv
	v[8] |= 1 << 0
	copy(v[9:41], spender.txHash[:])
	byteOrder.PutUint32(v[41:45], uint32(spender.block.Height))
	copy(v[45:77], spender.block.Hash[:])
	byteOrder.PutUint32(v[77:81], spender.index)

	return btcutil.Amount(byteOrder.Uint64(v[0:8])), putRawCredit(ns, k, v)
}
Ejemplo n.º 15
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func putTxRecord(ns walletdb.Bucket, rec *TxRecord, block *Block) error {
	k := keyTxRecord(&rec.Hash, block)
	v, err := valueTxRecord(rec)
	if err != nil {
		return err
	}
	err = ns.Bucket(bucketTxRecords).Put(k, v)
	if err != nil {
		str := fmt.Sprintf("%s: put failed for %v", bucketTxRecords, rec.Hash)
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 16
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// existsDebit checks for the existance of a debit.  If found, the debit and
// previous credit keys are returned.  If the debit does not exist, both keys
// are nil.
func existsDebit(ns walletdb.Bucket, txHash *wire.ShaHash, index uint32, block *Block) (k, credKey []byte, err error) {
	k = keyDebit(txHash, index, block)
	v := ns.Bucket(bucketDebits).Get(k)
	if v == nil {
		return nil, nil, nil
	}
	if len(v) < 80 {
		str := fmt.Sprintf("%s: short read (expected 80 bytes, read %v)",
			bucketDebits, len(v))
		return nil, nil, storeError(ErrData, str, nil)
	}
	return k, v[8:80], nil
}
Ejemplo n.º 17
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// existsRawUnspent returns the credit key if there exists an output recorded
// for the raw unspent key.  It returns nil if the k/v pair does not exist.
func existsRawUnspent(ns walletdb.Bucket, k []byte) (credKey []byte) {
	if len(k) < 36 {
		return nil
	}
	v := ns.Bucket(bucketUnspent).Get(k)
	if len(v) < 36 {
		return nil
	}
	credKey = make([]byte, 72)
	copy(credKey, k[:32])
	copy(credKey[32:68], v)
	copy(credKey[68:72], k[32:36])
	return credKey
}
Ejemplo n.º 18
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func putDebit(ns walletdb.Bucket, txHash *wire.ShaHash, index uint32, amount btcutil.Amount, block *Block, credKey []byte) error {
	k := keyDebit(txHash, index, block)

	v := make([]byte, 80)
	byteOrder.PutUint64(v, uint64(amount))
	copy(v[8:80], credKey)

	err := ns.Bucket(bucketDebits).Put(k, v)
	if err != nil {
		str := fmt.Sprintf("failed to update debit %s input %d",
			txHash, index)
		return storeError(ErrDatabase, str, err)
	}
	return nil
}
Ejemplo n.º 19
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// unspendRawCredit rewrites the credit for the given key as unspent.  The
// output amount of the credit is returned.  It returns without error if no
// credit exists for the key.
func unspendRawCredit(ns walletdb.Bucket, k []byte) (btcutil.Amount, error) {
	b := ns.Bucket(bucketCredits)
	v := b.Get(k)
	if v == nil {
		return 0, nil
	}
	newv := make([]byte, 9)
	copy(newv, v)
	newv[8] &^= 1 << 0

	err := b.Put(k, newv)
	if err != nil {
		str := "failed to put credit"
		return 0, storeError(ErrDatabase, str, err)
	}
	return btcutil.Amount(byteOrder.Uint64(v[0:8])), nil
}
Ejemplo n.º 20
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func (s *Store) unminedTxRecords(ns walletdb.Bucket) (map[wire.ShaHash]*TxRecord, error) {
	unmined := make(map[wire.ShaHash]*TxRecord)
	err := ns.Bucket(bucketUnmined).ForEach(func(k, v []byte) error {
		var txHash wire.ShaHash
		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
}
Ejemplo n.º 21
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func existsRawTxRecord(ns walletdb.Bucket, k []byte) (v []byte) {
	return ns.Bucket(bucketTxRecords).Get(k)
}
Ejemplo n.º 22
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// testBucketInterface ensures the bucket interface is working properly by
// exercising all of its functions.
func testBucketInterface(tc *testContext, bucket walletdb.Bucket) bool {
	if bucket.Writable() != tc.isWritable {
		tc.t.Errorf("Bucket writable state does not match.")
		return false
	}

	if tc.isWritable {
		// keyValues holds the keys and values to use when putting
		// values into the bucket.
		var keyValues = map[string]string{
			"bucketkey1": "foo1",
			"bucketkey2": "foo2",
			"bucketkey3": "foo3",
		}
		if !testPutValues(tc, bucket, keyValues) {
			return false
		}

		if !testGetValues(tc, bucket, keyValues) {
			return false
		}

		// Iterate all of the keys using ForEach while making sure the
		// stored values are the expected values.
		keysFound := make(map[string]struct{}, len(keyValues))
		err := bucket.ForEach(func(k, v []byte) error {
			kString := string(k)
			wantV, ok := keyValues[kString]
			if !ok {
				return fmt.Errorf("ForEach: key '%s' should "+
					"exist", kString)
			}

			if !reflect.DeepEqual(v, []byte(wantV)) {
				return fmt.Errorf("ForEach: value for key '%s' "+
					"does not match - got %s, want %s",
					kString, v, wantV)
			}

			keysFound[kString] = struct{}{}
			return nil
		})
		if err != nil {
			tc.t.Errorf("%v", err)
			return false
		}

		// Ensure all keys were iterated.
		for k := range keyValues {
			if _, ok := keysFound[k]; !ok {
				tc.t.Errorf("ForEach: key '%s' was not iterated "+
					"when it should have been", k)
				return false
			}
		}

		// Delete the keys and ensure they were deleted.
		if !testDeleteValues(tc, bucket, keyValues) {
			return false
		}
		if !testGetValues(tc, bucket, rollbackValues(keyValues)) {
			return false
		}

		// Ensure creating a new bucket works as expected.
		testBucketName := []byte("testbucket")
		testBucket, err := bucket.CreateBucket(testBucketName)
		if err != nil {
			tc.t.Errorf("CreateBucket: unexpected error: %v", err)
			return false
		}
		if !testNestedBucket(tc, testBucket) {
			return false
		}

		// Ensure creating a bucket that already exists fails with the
		// expected error.
		wantErr := walletdb.ErrBucketExists
		if _, err := bucket.CreateBucket(testBucketName); err != wantErr {
			tc.t.Errorf("CreateBucket: unexpected error - got %v, "+
				"want %v", err, wantErr)
			return false
		}

		// Ensure CreateBucketIfNotExists returns an existing bucket.
		testBucket, err = bucket.CreateBucketIfNotExists(testBucketName)
		if err != nil {
			tc.t.Errorf("CreateBucketIfNotExists: unexpected "+
				"error: %v", err)
			return false
		}
		if !testNestedBucket(tc, testBucket) {
			return false
		}

		// Ensure retrieving and existing bucket works as expected.
		testBucket = bucket.Bucket(testBucketName)
		if !testNestedBucket(tc, testBucket) {
			return false
		}

		// Ensure deleting a bucket works as intended.
		if err := bucket.DeleteBucket(testBucketName); err != nil {
			tc.t.Errorf("DeleteBucket: unexpected error: %v", err)
			return false
		}
		if b := bucket.Bucket(testBucketName); b != nil {
			tc.t.Errorf("DeleteBucket: bucket '%s' still exists",
				testBucketName)
			return false
		}

		// Ensure deleting a bucket that doesn't exist returns the
		// expected error.
		wantErr = walletdb.ErrBucketNotFound
		if err := bucket.DeleteBucket(testBucketName); err != wantErr {
			tc.t.Errorf("DeleteBucket: unexpected error - got %v, "+
				"want %v", err, wantErr)
			return false
		}

		// Ensure CreateBucketIfNotExists creates a new bucket when
		// it doesn't already exist.
		testBucket, err = bucket.CreateBucketIfNotExists(testBucketName)
		if err != nil {
			tc.t.Errorf("CreateBucketIfNotExists: unexpected "+
				"error: %v", err)
			return false
		}
		if !testNestedBucket(tc, testBucket) {
			return false
		}

		// Delete the test bucket to avoid leaving it around for future
		// calls.
		if err := bucket.DeleteBucket(testBucketName); err != nil {
			tc.t.Errorf("DeleteBucket: unexpected error: %v", err)
			return false
		}
		if b := bucket.Bucket(testBucketName); b != nil {
			tc.t.Errorf("DeleteBucket: bucket '%s' still exists",
				testBucketName)
			return false
		}
	} else {
		// Put should fail with bucket that is not writable.
		wantErr := walletdb.ErrTxNotWritable
		failBytes := []byte("fail")
		if err := bucket.Put(failBytes, failBytes); err != wantErr {
			tc.t.Errorf("Put did not fail with unwritable bucket")
			return false
		}

		// Delete should fail with bucket that is not writable.
		if err := bucket.Delete(failBytes); err != wantErr {
			tc.t.Errorf("Put did not fail with unwritable bucket")
			return false
		}

		// CreateBucket should fail with bucket that is not writable.
		if _, err := bucket.CreateBucket(failBytes); err != wantErr {
			tc.t.Errorf("CreateBucket did not fail with unwritable " +
				"bucket")
			return false
		}

		// CreateBucketIfNotExists should fail with bucket that is not
		// writable.
		if _, err := bucket.CreateBucketIfNotExists(failBytes); err != wantErr {
			tc.t.Errorf("CreateBucketIfNotExists did not fail with " +
				"unwritable bucket")
			return false
		}

		// DeleteBucket should fail with bucket that is not writable.
		if err := bucket.DeleteBucket(failBytes); err != wantErr {
			tc.t.Errorf("DeleteBucket did not fail with unwritable " +
				"bucket")
			return false
		}
	}

	return true
}
Ejemplo n.º 23
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func (s *Store) balance(ns walletdb.Bucket, minConf int32, syncHeight int32) (btcutil.Amount, error) {
	bal, err := fetchMinedBalance(ns)
	if err != nil {
		return 0, err
	}

	// Subtract the balance for each credit that is spent by an unmined
	// transaction.
	var op wire.OutPoint
	var block Block
	err = ns.Bucket(bucketUnspent).ForEach(func(k, v []byte) error {
		err := readCanonicalOutPoint(k, &op)
		if err != nil {
			return err
		}
		err = readUnspentBlock(v, &block)
		if err != nil {
			return err
		}
		if existsRawUnminedInput(ns, k) != nil {
			_, v := existsCredit(ns, &op.Hash, op.Index, &block)
			amt, err := fetchRawCreditAmount(v)
			if err != nil {
				return err
			}
			bal -= amt
		}
		return nil
	})
	if err != nil {
		if _, ok := err.(Error); ok {
			return 0, err
		}
		str := "failed iterating unspent outputs"
		return 0, storeError(ErrDatabase, str, err)
	}

	// Decrement the balance for any unspent credit with less than
	// minConf confirmations and any (unspent) immature coinbase credit.
	stopConf := minConf
	if blockchain.CoinbaseMaturity > stopConf {
		stopConf = blockchain.CoinbaseMaturity
	}
	lastHeight := syncHeight - stopConf
	blockIt := makeReverseBlockIterator(ns)
	for blockIt.prev() {
		block := &blockIt.elem

		if block.Height < lastHeight {
			break
		}

		for i := range block.transactions {
			txHash := &block.transactions[i]
			rec, err := fetchTxRecord(ns, txHash, &block.Block)
			if err != nil {
				return 0, err
			}
			numOuts := uint32(len(rec.MsgTx.TxOut))
			for i := uint32(0); i < numOuts; i++ {
				// Avoid double decrementing the credit amount
				// if it was already removed for being spent by
				// an unmined tx.
				opKey := canonicalOutPoint(txHash, i)
				if existsRawUnminedInput(ns, opKey) != nil {
					continue
				}

				_, v := existsCredit(ns, txHash, i, &block.Block)
				if v == nil {
					continue
				}
				amt, spent, err := fetchRawCreditAmountSpent(v)
				if err != nil {
					return 0, err
				}
				if spent {
					continue
				}
				confs := syncHeight - block.Height + 1
				if confs < minConf || (blockchain.IsCoinBaseTx(&rec.MsgTx) &&
					confs < blockchain.CoinbaseMaturity) {
					bal -= amt
				}
			}
		}
	}
	if blockIt.err != nil {
		return 0, blockIt.err
	}

	// If unmined outputs are included, increment the balance for each
	// output that is unspent.
	if minConf == 0 {
		err = ns.Bucket(bucketUnminedCredits).ForEach(func(k, v []byte) error {
			if existsRawUnminedInput(ns, k) != nil {
				// Output is spent by an unmined transaction.
				// Skip to next unmined credit.
				return nil
			}

			amount, err := fetchRawUnminedCreditAmount(v)
			if err != nil {
				return err
			}
			bal += amount
			return nil
		})
		if err != nil {
			if _, ok := err.(Error); ok {
				return 0, err
			}
			str := "failed to iterate over unmined credits bucket"
			return 0, storeError(ErrDatabase, str, err)
		}
	}

	return bal, nil
}
Ejemplo n.º 24
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func (s *Store) unspentOutputs(ns walletdb.Bucket) ([]Credit, error) {
	var unspent []Credit

	var op wire.OutPoint
	var block Block
	err := ns.Bucket(bucketUnspent).ForEach(func(k, v []byte) error {
		err := readCanonicalOutPoint(k, &op)
		if err != nil {
			return err
		}
		if existsRawUnminedInput(ns, k) != nil {
			// Output is spent by an unmined transaction.
			// Skip this k/v pair.
			return nil
		}
		err = readUnspentBlock(v, &block)
		if err != nil {
			return err
		}

		blockTime, err := fetchBlockTime(ns, block.Height)
		if err != nil {
			return err
		}
		// TODO(jrick): reading the entire transaction should
		// be avoidable.  Creating the credit only requires the
		// output amount and pkScript.
		rec, err := fetchTxRecord(ns, &op.Hash, &block)
		if err != nil {
			return err
		}
		txOut := rec.MsgTx.TxOut[op.Index]
		cred := Credit{
			OutPoint: op,
			BlockMeta: BlockMeta{
				Block: block,
				Time:  blockTime,
			},
			Amount:       btcutil.Amount(txOut.Value),
			PkScript:     txOut.PkScript,
			Received:     rec.Received,
			FromCoinBase: blockchain.IsCoinBaseTx(&rec.MsgTx),
		}
		unspent = append(unspent, cred)
		return nil
	})
	if err != nil {
		if _, ok := err.(Error); ok {
			return nil, err
		}
		str := "failed iterating unspent bucket"
		return nil, storeError(ErrDatabase, str, err)
	}

	err = ns.Bucket(bucketUnminedCredits).ForEach(func(k, v []byte) error {
		if existsRawUnminedInput(ns, k) != nil {
			// Output is spent by an unmined transaction.
			// Skip to next unmined credit.
			return nil
		}

		err := readCanonicalOutPoint(k, &op)
		if err != nil {
			return err
		}

		// TODO(jrick): Reading/parsing the entire transaction record
		// just for the output amount and script can be avoided.
		recVal := existsRawUnmined(ns, op.Hash[:])
		var rec TxRecord
		err = readRawTxRecord(&op.Hash, recVal, &rec)
		if err != nil {
			return err
		}

		txOut := rec.MsgTx.TxOut[op.Index]
		cred := Credit{
			OutPoint: op,
			BlockMeta: BlockMeta{
				Block: Block{Height: -1},
			},
			Amount:       btcutil.Amount(txOut.Value),
			PkScript:     txOut.PkScript,
			Received:     rec.Received,
			FromCoinBase: blockchain.IsCoinBaseTx(&rec.MsgTx),
		}
		unspent = append(unspent, cred)
		return nil
	})
	if err != nil {
		if _, ok := err.(Error); ok {
			return nil, err
		}
		str := "failed iterating unmined credits bucket"
		return nil, storeError(ErrDatabase, str, err)
	}

	return unspent, nil
}
Ejemplo n.º 25
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func deleteTxRecord(ns walletdb.Bucket, txHash *wire.ShaHash, block *Block) error {
	k := keyTxRecord(txHash, block)
	return ns.Bucket(bucketTxRecords).Delete(k)
}
Ejemplo n.º 26
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func existsRawUnmined(ns walletdb.Bucket, k []byte) (v []byte) {
	return ns.Bucket(bucketUnmined).Get(k)
}
Ejemplo n.º 27
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func makeDebitIterator(ns walletdb.Bucket, prefix []byte) debitIterator {
	c := ns.Bucket(bucketDebits).Cursor()
	return debitIterator{c: c, prefix: prefix}
}
Ejemplo n.º 28
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func existsCredit(ns walletdb.Bucket, txHash *wire.ShaHash, index uint32, block *Block) (k, v []byte) {
	k = keyCredit(txHash, index, block)
	v = ns.Bucket(bucketCredits).Get(k)
	return
}
Ejemplo n.º 29
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func existsRawCredit(ns walletdb.Bucket, k []byte) []byte {
	return ns.Bucket(bucketCredits).Get(k)
}
Ejemplo n.º 30
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func makeCreditIterator(ns walletdb.Bucket, prefix []byte) creditIterator {
	c := ns.Bucket(bucketCredits).Cursor()
	return creditIterator{c: c, prefix: prefix}
}