// Tests that receipts can be stored and retrieved.
func TestReceiptStorage(t *testing.T) {
	db, _ := ethdb.NewMemDatabase()

	receipt1 := &types.Receipt{
		PostState:         []byte{0x01},
		CumulativeGasUsed: big.NewInt(1),
		Logs: vm.Logs{
			&vm.Log{Address: common.BytesToAddress([]byte{0x11})},
			&vm.Log{Address: common.BytesToAddress([]byte{0x01, 0x11})},
		},
		TxHash:          common.BytesToHash([]byte{0x11, 0x11}),
		ContractAddress: common.BytesToAddress([]byte{0x01, 0x11, 0x11}),
		GasUsed:         big.NewInt(111111),
	}
	receipt2 := &types.Receipt{
		PostState:         []byte{0x02},
		CumulativeGasUsed: big.NewInt(2),
		Logs: vm.Logs{
			&vm.Log{Address: common.BytesToAddress([]byte{0x22})},
			&vm.Log{Address: common.BytesToAddress([]byte{0x02, 0x22})},
		},
		TxHash:          common.BytesToHash([]byte{0x22, 0x22}),
		ContractAddress: common.BytesToAddress([]byte{0x02, 0x22, 0x22}),
		GasUsed:         big.NewInt(222222),
	}
	receipts := []*types.Receipt{receipt1, receipt2}

	// Check that no receipt entries are in a pristine database
	for i, receipt := range receipts {
		if r := GetReceipt(db, receipt.TxHash); r != nil {
			t.Fatalf("receipt #%d [%x]: non existent receipt returned: %v", i, receipt.TxHash, r)
		}
	}
	// Insert all the receipts into the database, and verify contents
	if err := WriteReceipts(db, receipts); err != nil {
		t.Fatalf("failed to write receipts: %v", err)
	}
	for i, receipt := range receipts {
		if r := GetReceipt(db, receipt.TxHash); r == nil {
			t.Fatalf("receipt #%d [%x]: receipt not found", i, receipt.TxHash)
		} else {
			rlpHave, _ := rlp.EncodeToBytes(r)
			rlpWant, _ := rlp.EncodeToBytes(receipt)

			if bytes.Compare(rlpHave, rlpWant) != 0 {
				t.Fatalf("receipt #%d [%x]: receipt mismatch: have %v, want %v", i, receipt.TxHash, r, receipt)
			}
		}
	}
	// Delete the receipts and check purge
	for i, receipt := range receipts {
		DeleteReceipt(db, receipt.TxHash)
		if r := GetReceipt(db, receipt.TxHash); r != nil {
			t.Fatalf("receipt #%d [%x]: deleted receipt returned: %v", i, receipt.TxHash, r)
		}
	}
}
// Tests that receipts associated with a single block can be stored and retrieved.
func TestBlockReceiptStorage(t *testing.T) {
	db, _ := ethdb.NewMemDatabase()

	receipt1 := &types.Receipt{
		PostState:         []byte{0x01},
		CumulativeGasUsed: big.NewInt(1),
		Logs: vm.Logs{
			&vm.Log{Address: common.BytesToAddress([]byte{0x11})},
			&vm.Log{Address: common.BytesToAddress([]byte{0x01, 0x11})},
		},
		TxHash:          common.BytesToHash([]byte{0x11, 0x11}),
		ContractAddress: common.BytesToAddress([]byte{0x01, 0x11, 0x11}),
		GasUsed:         big.NewInt(111111),
	}
	receipt2 := &types.Receipt{
		PostState:         []byte{0x02},
		CumulativeGasUsed: big.NewInt(2),
		Logs: vm.Logs{
			&vm.Log{Address: common.BytesToAddress([]byte{0x22})},
			&vm.Log{Address: common.BytesToAddress([]byte{0x02, 0x22})},
		},
		TxHash:          common.BytesToHash([]byte{0x22, 0x22}),
		ContractAddress: common.BytesToAddress([]byte{0x02, 0x22, 0x22}),
		GasUsed:         big.NewInt(222222),
	}
	receipts := []*types.Receipt{receipt1, receipt2}

	// Check that no receipt entries are in a pristine database
	hash := common.BytesToHash([]byte{0x03, 0x14})
	if rs := GetBlockReceipts(db, hash); len(rs) != 0 {
		t.Fatalf("non existent receipts returned: %v", rs)
	}
	// Insert the receipt slice into the database and check presence
	if err := WriteBlockReceipts(db, hash, receipts); err != nil {
		t.Fatalf("failed to write block receipts: %v", err)
	}
	if rs := GetBlockReceipts(db, hash); len(rs) == 0 {
		t.Fatalf("no receipts returned")
	} else {
		for i := 0; i < len(receipts); i++ {
			rlpHave, _ := rlp.EncodeToBytes(rs[i])
			rlpWant, _ := rlp.EncodeToBytes(receipts[i])

			if bytes.Compare(rlpHave, rlpWant) != 0 {
				t.Fatalf("receipt #%d: receipt mismatch: have %v, want %v", i, rs[i], receipts[i])
			}
		}
	}
	// Delete the receipt slice and check purge
	DeleteBlockReceipts(db, hash)
	if rs := GetBlockReceipts(db, hash); len(rs) != 0 {
		t.Fatalf("deleted receipts returned: %v", rs)
	}
}
Exemple #3
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// ExpectMsg reads a message from r and verifies that its
// code and encoded RLP content match the provided values.
// If content is nil, the payload is discarded and not verified.
func ExpectMsg(r MsgReader, code uint64, content interface{}) error {
	msg, err := r.ReadMsg()
	if err != nil {
		return err
	}
	if msg.Code != code {
		return fmt.Errorf("message code mismatch: got %d, expected %d", msg.Code, code)
	}
	if content == nil {
		return msg.Discard()
	} else {
		contentEnc, err := rlp.EncodeToBytes(content)
		if err != nil {
			panic("content encode error: " + err.Error())
		}
		if int(msg.Size) != len(contentEnc) {
			return fmt.Errorf("message size mismatch: got %d, want %d", msg.Size, len(contentEnc))
		}
		actualContent, err := ioutil.ReadAll(msg.Payload)
		if err != nil {
			return err
		}
		if !bytes.Equal(actualContent, contentEnc) {
			return fmt.Errorf("message payload mismatch:\ngot:  %x\nwant: %x", actualContent, contentEnc)
		}
	}
	return nil
}
Exemple #4
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func TestEncodeZero(t *testing.T) {
	b, _ := rlp.EncodeToBytes(NewValue(0))
	exp := []byte{0xc0}
	if bytes.Compare(b, exp) == 0 {
		t.Error("Expected", exp, "got", b)
	}
}
Exemple #5
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// updateNode inserts - potentially overwriting - a node into the peer database.
func (db *nodeDB) updateNode(node *Node) error {
	blob, err := rlp.EncodeToBytes(node)
	if err != nil {
		return err
	}
	return db.lvl.Put(makeKey(node.ID, nodeDBDiscoverRoot), blob, nil)
}
Exemple #6
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func (self *Receipt) RlpEncode() []byte {
	bytes, err := rlp.EncodeToBytes(self)
	if err != nil {
		fmt.Println("TMP -- RECEIPT ENCODE ERROR", err)
	}
	return bytes
}
// PutReceipts stores the receipts in the current database
func PutReceipts(db common.Database, receipts types.Receipts) error {
	batch := new(leveldb.Batch)
	_, batchWrite := db.(*ethdb.LDBDatabase)

	for _, receipt := range receipts {
		storageReceipt := (*types.ReceiptForStorage)(receipt)
		bytes, err := rlp.EncodeToBytes(storageReceipt)
		if err != nil {
			return err
		}

		if batchWrite {
			batch.Put(append(receiptsPre, receipt.TxHash[:]...), bytes)
		} else {
			err = db.Put(append(receiptsPre, receipt.TxHash[:]...), bytes)
			if err != nil {
				return err
			}
		}
	}
	if db, ok := db.(*ethdb.LDBDatabase); ok {
		if err := db.LDB().Write(batch, nil); err != nil {
			return err
		}
	}

	return nil
}
Exemple #8
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// Hash returns the SHA3 hash of the envelope, calculating it if not yet done.
func (self *Envelope) Hash() common.Hash {
	if (self.hash == common.Hash{}) {
		enc, _ := rlp.EncodeToBytes(self)
		self.hash = crypto.Sha3Hash(enc)
	}
	return self.hash
}
Exemple #9
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func (self *ethApi) SignTransaction(req *shared.Request) (interface{}, error) {
	args := new(NewTxArgs)
	if err := self.codec.Decode(req.Params, &args); err != nil {
		return nil, shared.NewDecodeParamError(err.Error())
	}

	// nonce may be nil ("guess" mode)
	var nonce string
	if args.Nonce != nil {
		nonce = args.Nonce.String()
	}

	var gas, price string
	if args.Gas != nil {
		gas = args.Gas.String()
	}
	if args.GasPrice != nil {
		price = args.GasPrice.String()
	}
	tx, err := self.xeth.SignTransaction(args.From, args.To, nonce, args.Value.String(), gas, price, args.Data)
	if err != nil {
		return nil, err
	}

	data, err := rlp.EncodeToBytes(tx)
	if err != nil {
		return nil, err
	}

	return JsonTransaction{"0x" + common.Bytes2Hex(data), newTx(tx)}, nil
}
Exemple #10
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// RlpEncode implements common.RlpEncode required for SHA3 derivation.
func (r *Receipt) RlpEncode() []byte {
	bytes, err := rlp.EncodeToBytes(r)
	if err != nil {
		panic(err)
	}
	return bytes
}
func sendBadBlockReport(block *types.Block, err error) {
	if !EnableBadBlockReporting {
		return
	}

	var (
		blockRLP, _ = rlp.EncodeToBytes(block)
		params      = map[string]interface{}{
			"block":     common.Bytes2Hex(blockRLP),
			"blockHash": block.Hash().Hex(),
			"errortype": err.Error(),
			"client":    "go",
		}
	)
	if !block.ReceivedAt.IsZero() {
		params["receivedAt"] = block.ReceivedAt.UTC().String()
	}
	if p, ok := block.ReceivedFrom.(*peer); ok {
		params["receivedFrom"] = map[string]interface{}{
			"enode":           fmt.Sprintf("enode://%x@%v", p.ID(), p.RemoteAddr()),
			"name":            p.Name(),
			"protocolVersion": p.version,
		}
	}
	jsonStr, _ := json.Marshal(map[string]interface{}{"method": "eth_badBlock", "id": "1", "jsonrpc": "2.0", "params": []interface{}{params}})
	client := http.Client{Timeout: 8 * time.Second}
	resp, err := client.Post(badBlocksURL, "application/json", bytes.NewReader(jsonStr))
	if err != nil {
		glog.V(logger.Debug).Infoln(err)
		return
	}
	glog.V(logger.Debug).Infof("Bad Block Report posted (%d)", resp.StatusCode)
	resp.Body.Close()
}
Exemple #12
0
func TestEncodeDecodeBytes(t *testing.T) {
	bv := NewValue([]interface{}{[]byte{1, 2, 3, 4, 5}, []byte{6}})
	b, _ := rlp.EncodeToBytes(bv)
	val := NewValueFromBytes(b)
	if !bv.Cmp(val) {
		t.Errorf("Expected %#v, got %#v", bv, val)
	}
}
Exemple #13
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// updateStateObject writes the given object to the trie.
func (self *StateDB) updateStateObject(stateObject *StateObject) {
	addr := stateObject.Address()
	data, err := rlp.EncodeToBytes(stateObject)
	if err != nil {
		panic(fmt.Errorf("can't encode object at %x: %v", addr[:], err))
	}
	self.trie.Update(addr[:], data)
}
Exemple #14
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func (c *StateObject) setAddr(addr []byte, value common.Hash) {
	v, err := rlp.EncodeToBytes(bytes.TrimLeft(value[:], "\x00"))
	if err != nil {
		// if RLPing failed we better panic and not fail silently. This would be considered a consensus issue
		panic(err)
	}
	c.trie.Update(addr, v)
}
// PutTransactions stores the transactions in the given database
func PutTransactions(db common.Database, block *types.Block, txs types.Transactions) {
	batch := new(leveldb.Batch)
	_, batchWrite := db.(*ethdb.LDBDatabase)

	for i, tx := range block.Transactions() {
		rlpEnc, err := rlp.EncodeToBytes(tx)
		if err != nil {
			glog.V(logger.Debug).Infoln("Failed encoding tx", err)
			return
		}

		if batchWrite {
			batch.Put(tx.Hash().Bytes(), rlpEnc)
		} else {
			db.Put(tx.Hash().Bytes(), rlpEnc)
		}

		var txExtra struct {
			BlockHash  common.Hash
			BlockIndex uint64
			Index      uint64
		}
		txExtra.BlockHash = block.Hash()
		txExtra.BlockIndex = block.NumberU64()
		txExtra.Index = uint64(i)
		rlpMeta, err := rlp.EncodeToBytes(txExtra)
		if err != nil {
			glog.V(logger.Debug).Infoln("Failed encoding tx meta data", err)
			return
		}

		if batchWrite {
			batch.Put(append(tx.Hash().Bytes(), 0x0001), rlpMeta)
		} else {
			db.Put(append(tx.Hash().Bytes(), 0x0001), rlpMeta)
		}
	}

	if db, ok := db.(*ethdb.LDBDatabase); ok {
		if err := db.LDB().Write(batch, nil); err != nil {
			glog.V(logger.Error).Infoln("db write err:", err)
		}
	}
}
Exemple #16
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func TestRLPXFrameRW(t *testing.T) {
	var (
		aesSecret      = make([]byte, 16)
		macSecret      = make([]byte, 16)
		egressMACinit  = make([]byte, 32)
		ingressMACinit = make([]byte, 32)
	)
	for _, s := range [][]byte{aesSecret, macSecret, egressMACinit, ingressMACinit} {
		rand.Read(s)
	}
	conn := new(bytes.Buffer)

	s1 := secrets{
		AES:        aesSecret,
		MAC:        macSecret,
		EgressMAC:  sha3.NewKeccak256(),
		IngressMAC: sha3.NewKeccak256(),
	}
	s1.EgressMAC.Write(egressMACinit)
	s1.IngressMAC.Write(ingressMACinit)
	rw1 := newRLPXFrameRW(conn, s1)

	s2 := secrets{
		AES:        aesSecret,
		MAC:        macSecret,
		EgressMAC:  sha3.NewKeccak256(),
		IngressMAC: sha3.NewKeccak256(),
	}
	s2.EgressMAC.Write(ingressMACinit)
	s2.IngressMAC.Write(egressMACinit)
	rw2 := newRLPXFrameRW(conn, s2)

	// send some messages
	for i := 0; i < 10; i++ {
		// write message into conn buffer
		wmsg := []interface{}{"foo", "bar", strings.Repeat("test", i)}
		err := Send(rw1, uint64(i), wmsg)
		if err != nil {
			t.Fatalf("WriteMsg error (i=%d): %v", i, err)
		}

		// read message that rw1 just wrote
		msg, err := rw2.ReadMsg()
		if err != nil {
			t.Fatalf("ReadMsg error (i=%d): %v", i, err)
		}
		if msg.Code != uint64(i) {
			t.Fatalf("msg code mismatch: got %d, want %d", msg.Code, i)
		}
		payload, _ := ioutil.ReadAll(msg.Payload)
		wantPayload, _ := rlp.EncodeToBytes(wmsg)
		if !bytes.Equal(payload, wantPayload) {
			t.Fatalf("msg payload mismatch:\ngot  %x\nwant %x", payload, wantPayload)
		}
	}
}
Exemple #17
0
func DeriveSha(list DerivableList) common.Hash {
	db, _ := ethdb.NewMemDatabase()
	trie := trie.New(nil, db)
	for i := 0; i < list.Len(); i++ {
		key, _ := rlp.EncodeToBytes(uint(i))
		trie.Update(key, list.GetRlp(i))
	}

	return common.BytesToHash(trie.Root())
}
func TestTransactionEncode(t *testing.T) {
	txb, err := rlp.EncodeToBytes(rightvrsTx)
	if err != nil {
		t.Fatalf("encode error: %v", err)
	}
	should := common.FromHex("f86103018207d094b94f5374fce5edbc8e2a8697c15331677e6ebf0b0a8255441ca098ff921201554726367d2be8c804a7ff89ccf285ebc57dff8ae4c44b9c19ac4aa08887321be575c8095f789dd4c743dfe42c1820f9231f98a962b210e3ac2452a3")
	if !bytes.Equal(txb, should) {
		t.Errorf("encoded RLP mismatch, got %x", txb)
	}
}
// updateTrie writes cached storage modifications into the object's storage trie.
func (self *StateObject) updateTrie(db trie.Database) {
	tr := self.getTrie(db)
	for key, value := range self.dirtyStorage {
		delete(self.dirtyStorage, key)
		if (value == common.Hash{}) {
			tr.Delete(key[:])
			continue
		}
		// Encoding []byte cannot fail, ok to ignore the error.
		v, _ := rlp.EncodeToBytes(bytes.TrimLeft(value[:], "\x00"))
		tr.Update(key[:], v)
	}
}
// WriteHeader serializes a block header into the database.
func WriteHeader(db ethdb.Database, header *types.Header) error {
	data, err := rlp.EncodeToBytes(header)
	if err != nil {
		return err
	}
	key := append(append(blockPrefix, header.Hash().Bytes()...), headerSuffix...)
	if err := db.Put(key, data); err != nil {
		glog.Fatalf("failed to store header into database: %v", err)
		return err
	}
	glog.V(logger.Debug).Infof("stored header #%v [%x…]", header.Number, header.Hash().Bytes()[:4])
	return nil
}
// WriteBody serializes the body of a block into the database.
func WriteBody(db ethdb.Database, hash common.Hash, body *types.Body) error {
	data, err := rlp.EncodeToBytes(body)
	if err != nil {
		return err
	}
	key := append(append(blockPrefix, hash.Bytes()...), bodySuffix...)
	if err := db.Put(key, data); err != nil {
		glog.Fatalf("failed to store block body into database: %v", err)
		return err
	}
	glog.V(logger.Debug).Infof("stored block body [%x…]", hash.Bytes()[:4])
	return nil
}
// WriteTd serializes the total difficulty of a block into the database.
func WriteTd(db ethdb.Database, hash common.Hash, td *big.Int) error {
	data, err := rlp.EncodeToBytes(td)
	if err != nil {
		return err
	}
	key := append(append(blockPrefix, hash.Bytes()...), tdSuffix...)
	if err := db.Put(key, data); err != nil {
		glog.Fatalf("failed to store block total difficulty into database: %v", err)
		return err
	}
	glog.V(logger.Debug).Infof("stored block total difficulty [%x…]: %v", hash.Bytes()[:4], td)
	return nil
}
Exemple #23
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func (self *debugApi) GetBlockRlp(req *shared.Request) (interface{}, error) {
	args := new(BlockNumArg)
	if err := self.codec.Decode(req.Params, &args); err != nil {
		return nil, shared.NewDecodeParamError(err.Error())
	}

	block := self.xeth.EthBlockByNumber(args.BlockNumber)
	if block == nil {
		return nil, fmt.Errorf("block #%d not found", args.BlockNumber)
	}
	encoded, err := rlp.EncodeToBytes(block)
	return fmt.Sprintf("%x", encoded), err
}
// WriteTransactions stores the transactions associated with a specific block
// into the given database. Beside writing the transaction, the function also
// stores a metadata entry along with the transaction, detailing the position
// of this within the blockchain.
func WriteTransactions(db ethdb.Database, block *types.Block) error {
	batch := db.NewBatch()

	// Iterate over each transaction and encode it with its metadata
	for i, tx := range block.Transactions() {
		// Encode and queue up the transaction for storage
		data, err := rlp.EncodeToBytes(tx)
		if err != nil {
			return err
		}
		if err := batch.Put(tx.Hash().Bytes(), data); err != nil {
			return err
		}
		// Encode and queue up the transaction metadata for storage
		meta := struct {
			BlockHash  common.Hash
			BlockIndex uint64
			Index      uint64
		}{
			BlockHash:  block.Hash(),
			BlockIndex: block.NumberU64(),
			Index:      uint64(i),
		}
		data, err = rlp.EncodeToBytes(meta)
		if err != nil {
			return err
		}
		if err := batch.Put(append(tx.Hash().Bytes(), txMetaSuffix...), data); err != nil {
			return err
		}
	}
	// Write the scheduled data into the database
	if err := batch.Write(); err != nil {
		glog.Fatalf("failed to store transactions into database: %v", err)
		return err
	}
	return nil
}
Exemple #25
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func TestRlpValueEncoding(t *testing.T) {
	val := EmptyValue()
	val.AppendList().Append(byte(1)).Append(byte(2)).Append(byte(3))
	val.Append("4").AppendList().Append(byte(5))

	res, err := rlp.EncodeToBytes(val)
	if err != nil {
		t.Fatalf("encode error: %v", err)
	}
	exp := Encode([]interface{}{[]interface{}{1, 2, 3}, "4", []interface{}{5}})
	if bytes.Compare(res, exp) != 0 {
		t.Errorf("expected %x, got %x", exp, res)
	}
}
Exemple #26
0
// Prove constructs a merkle proof for key. The result contains all
// encoded nodes on the path to the value at key. The value itself is
// also included in the last node and can be retrieved by verifying
// the proof.
//
// If the trie does not contain a value for key, the returned proof
// contains all nodes of the longest existing prefix of the key
// (at least the root node), ending with the node that proves the
// absence of the key.
func (t *Trie) Prove(key []byte) []rlp.RawValue {
	// Collect all nodes on the path to key.
	key = compactHexDecode(key)
	nodes := []node{}
	tn := t.root
	for len(key) > 0 && tn != nil {
		switch n := tn.(type) {
		case shortNode:
			if len(key) < len(n.Key) || !bytes.Equal(n.Key, key[:len(n.Key)]) {
				// The trie doesn't contain the key.
				tn = nil
			} else {
				tn = n.Val
				key = key[len(n.Key):]
			}
			nodes = append(nodes, n)
		case fullNode:
			tn = n.Children[key[0]]
			key = key[1:]
			nodes = append(nodes, n)
		case hashNode:
			var err error
			tn, err = t.resolveHash(n, nil, nil)
			if err != nil {
				if glog.V(logger.Error) {
					glog.Errorf("Unhandled trie error: %v", err)
				}
				return nil
			}
		default:
			panic(fmt.Sprintf("%T: invalid node: %v", tn, tn))
		}
	}
	hasher := newHasher()
	proof := make([]rlp.RawValue, 0, len(nodes))
	for i, n := range nodes {
		// Don't bother checking for errors here since hasher panics
		// if encoding doesn't work and we're not writing to any database.
		n, _, _ = hasher.hashChildren(n, nil)
		hn, _ := hasher.store(n, nil, false)
		if _, ok := hn.(hashNode); ok || i == 0 {
			// If the node's database encoding is a hash (or is the
			// root node), it becomes a proof element.
			enc, _ := rlp.EncodeToBytes(n)
			proof = append(proof, enc)
		}
	}
	return proof
}
Exemple #27
0
// SendTransaction implements ContractTransactor.SendTransaction, delegating the
// raw transaction injection to the remote node.
func (b *rpcBackend) SendTransaction(tx *types.Transaction) error {
	data, err := rlp.EncodeToBytes(tx)
	if err != nil {
		return err
	}
	res, err := b.request("exp_sendRawTransaction", []interface{}{common.ToHex(data)})
	if err != nil {
		return err
	}
	var hex string
	if err := json.Unmarshal(res, &hex); err != nil {
		return err
	}
	return nil
}
Exemple #28
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// WriteBlock writes a block to the database
func WriteBlock(db common.Database, block *types.Block) error {
	tstart := time.Now()

	enc, _ := rlp.EncodeToBytes((*types.StorageBlock)(block))
	key := append(blockHashPre, block.Hash().Bytes()...)
	err := db.Put(key, enc)
	if err != nil {
		glog.Fatal("db write fail:", err)
		return err
	}

	if glog.V(logger.Debug) {
		glog.Infof("wrote block #%v %s. Took %v\n", block.Number(), common.PP(block.Hash().Bytes()), time.Since(tstart))
	}

	return nil
}
// PutBlockReceipts stores the block's transactions associated receipts
// and stores them by block hash in a single slice. This is required for
// forks and chain reorgs
func PutBlockReceipts(db common.Database, block *types.Block, receipts types.Receipts) error {
	rs := make([]*types.ReceiptForStorage, len(receipts))
	for i, receipt := range receipts {
		rs[i] = (*types.ReceiptForStorage)(receipt)
	}
	bytes, err := rlp.EncodeToBytes(rs)
	if err != nil {
		return err
	}

	hash := block.Hash()
	err = db.Put(append(blockReceiptsPre, hash[:]...), bytes)
	if err != nil {
		return err
	}

	return nil
}
// WriteBlockReceipts stores all the transaction receipts belonging to a block
// as a single receipt slice. This is used during chain reorganisations for
// rescheduling dropped transactions.
func WriteBlockReceipts(db ethdb.Database, hash common.Hash, receipts types.Receipts) error {
	// Convert the receipts into their storage form and serialize them
	storageReceipts := make([]*types.ReceiptForStorage, len(receipts))
	for i, receipt := range receipts {
		storageReceipts[i] = (*types.ReceiptForStorage)(receipt)
	}
	bytes, err := rlp.EncodeToBytes(storageReceipts)
	if err != nil {
		return err
	}
	// Store the flattened receipt slice
	if err := db.Put(append(blockReceiptsPrefix, hash.Bytes()...), bytes); err != nil {
		glog.Fatalf("failed to store block receipts into database: %v", err)
		return err
	}
	glog.V(logger.Debug).Infof("stored block receipts [%x…]", hash.Bytes()[:4])
	return nil
}