How to use deserializeHeader method of db Package

Best Syzkaller code snippet using db.deserializeHeader

headers.go

Source:headers.go

...151		b := tip.Get(KEYChainTip)152		if b == nil {153			return errors.New("ChainTip not set")154		}155		sh, err := deserializeHeader(b)156		if err != nil {157			return err158		}159		height := sh.height160		if numHeaders > MAX_HEADERS {161			var toDelete [][]byte162			pruneHeight := height - 2000163			err := hdrs.ForEach(func(k, v []byte) error {164				sh, err := deserializeHeader(v)165				if err != nil {166					return err167				}168				if sh.height <= pruneHeight {169					toDelete = append(toDelete, k)170				}171				return nil172			})173			if err != nil {174				return err175			}176			for _, k := range toDelete {177				err := hdrs.Delete(k)178				if err != nil {179					return err180				}181			}182		}183		return nil184	})185}186func (h *HeaderDB) DeleteAfter(height uint32) error {187	h.lock.Lock()188	defer h.lock.Unlock()189	return h.db.Update(func(btx *bolt.Tx) error {190		hdrs := btx.Bucket(BKTHeaders)191		var toDelete [][]byte192		err := hdrs.ForEach(func(k, v []byte) error {193			sh, err := deserializeHeader(v)194			if err != nil {195				return err196			}197			if sh.height > height {198				toDelete = append(toDelete, k)199			}200			return nil201		})202		if err != nil {203			return err204		}205		for _, k := range toDelete {206			err := hdrs.Delete(k)207			if err != nil {208				return err209			}210		}211		return nil212	})213}214func (h *HeaderDB) GetPreviousHeader(header wire.BlockHeader) (sh StoredHeader, err error) {215	hash := header.PrevBlock216	return h.GetHeader(hash)217}218func (h *HeaderDB) GetHeader(hash chainhash.Hash) (sh StoredHeader, err error) {219	h.lock.Lock()220	defer h.lock.Unlock()221	cachedHeader, cerr := h.cache.Get(hash)222	if cerr == nil {223		return cachedHeader, nil224	}225	err = h.db.View(func(btx *bolt.Tx) error {226		hdrs := btx.Bucket(BKTHeaders)227		b := hdrs.Get(hash.CloneBytes())228		if b == nil {229			return errors.New("Header does not exist in database")230		}231		sh, err = deserializeHeader(b)232		if err != nil {233			return err234		}235		return nil236	})237	if err != nil {238		return sh, err239	}240	return sh, nil241}242func (h *HeaderDB) GetBestHeader() (sh StoredHeader, err error) {243	h.lock.Lock()244	defer h.lock.Unlock()245	if h.bestCache != nil {246		best := h.bestCache247		return *best, nil248	}249	err = h.db.View(func(btx *bolt.Tx) error {250		tip := btx.Bucket(BKTChainTip)251		b := tip.Get(KEYChainTip)252		if b == nil {253			return errors.New("ChainTip not set")254		}255		sh, err = deserializeHeader(b)256		if err != nil {257			return err258		}259		return nil260	})261	if err != nil {262		return sh, err263	}264	return sh, nil265}266func (h *HeaderDB) Height() (uint32, error) {267	h.lock.Lock()268	defer h.lock.Unlock()269	if h.bestCache != nil {270		return h.bestCache.height, nil271	}272	var height uint32273	err := h.db.View(func(btx *bolt.Tx) error {274		tip := btx.Bucket(BKTChainTip)275		sh, err := deserializeHeader(tip.Get(KEYChainTip))276		if err != nil {277			return err278		}279		height = sh.height280		return nil281	})282	if err != nil {283		return height, err284	}285	return height, nil286}287func (h *HeaderDB) Print(w io.Writer) {288	h.lock.Lock()289	defer h.lock.Unlock()290	m := make(map[float64][]string)291	h.db.View(func(tx *bolt.Tx) error {292		// Assume bucket exists and has keys293		bkt := tx.Bucket(BKTHeaders)294		bkt.ForEach(func(k, v []byte) error {295			sh, _ := deserializeHeader(v)296			h := float64(sh.height)297			_, ok := m[h]298			if ok {299				for {300					h += .1301					_, ok := m[h]302					if !ok {303						break304					}305				}306			}307			m[h] = []string{sh.header.BlockHash().String(), sh.header.PrevBlock.String()}308			return nil309		})310		return nil311	})312	var keys []float64313	for k := range m {314		keys = append(keys, float64(k))315	}316	sort.Float64s(keys)317	for _, k := range keys {318		fmt.Fprintf(w, "Height: %.1f, Hash: %s, Parent: %s\n", k, m[k][0], m[k][1])319	}320}321func (h *HeaderDB) initializeCache() {322	best, err := h.GetBestHeader()323	if err != nil {324		return325	}326	h.bestCache = &best327	headers := []StoredHeader{best}328	for i := 0; i < 99; i++ {329		sh, err := h.GetPreviousHeader(best.header)330		if err != nil {331			break332		}333		headers = append(headers, sh)334	}335	for i := len(headers) - 1; i >= 0; i-- {336		h.cache.Set(headers[i])337	}338}339func (h *HeaderDB) Close() {340	h.lock.Lock()341	h.db.Close()342}343/*----- header serialization ------- */344/* byteLength   desc          at offset345   80	       header	           0346    4	       height             80347   32	       total work         84348*/349func serializeHeader(sh StoredHeader) ([]byte, error) {350	var buf bytes.Buffer351	err := sh.header.Serialize(&buf)352	if err != nil {353		return nil, err354	}355	err = binary.Write(&buf, binary.BigEndian, sh.height)356	if err != nil {357		return nil, err358	}359	biBytes := sh.totalWork.Bytes()360	pad := make([]byte, 32-len(biBytes))361	serializedBI := append(pad, biBytes...)362	buf.Write(serializedBI)363	return buf.Bytes(), nil364}365func deserializeHeader(b []byte) (sh StoredHeader, err error) {366	r := bytes.NewReader(b)367	hdr := new(wire.BlockHeader)368	err = hdr.Deserialize(r)369	if err != nil {370		return sh, err371	}372	var height uint32373	err = binary.Read(r, binary.BigEndian, &height)374	if err != nil {375		return sh, err376	}377	biBytes := make([]byte, 32)378	_, err = r.Read(biBytes)379	if err != nil {...

deserializeHeader

Using AI Code Generation

1import (2func main() {3	db, err := ethdb.NewMemDatabase()4	if err != nil {5		fmt.Println("Error creating new database")6	}7	header := &types.Header{8		ParentHash: common.HexToHash("0x123"),9	}10	data, err := rlp.EncodeToBytes(header)11	if err != nil {12		fmt.Println("Error serializing header")13	}14	db.Put([]byte("header"), data)15	header2, err := db.DeserializeHeader([]byte("header"))16	if err != nil {

deserializeHeader

Using AI Code Generation

1import (2type SimpleChaincode struct {3}4func (t *SimpleChaincode) Init(stub shim.ChaincodeStubInterface) peer.Response {5	return shim.Success(nil)6}7func (t *SimpleChaincode) Invoke(stub shim.ChaincodeStubInterface) peer.Response {8	fn, args := stub.GetFunctionAndParameters()9	if fn == "set" {10		result, err = set(stub, args)11	} else if fn == "get" {12		result, err = get(stub, args)13	} else {14		return shim.Error("Invalid Smart Contract function name.")15	}16	if err != nil {17		return shim.Error(err.Error())18	}19	return shim.Success([]byte(result))20}21func set(stub shim.ChaincodeStubInterface, args []string) (string, error) {22	if len(args) != 2 {23		return "", fmt.Errorf("Incorrect number of arguments. Expecting 2. Got: %d.", len(args))24	}25	err := stub.PutState(args[0], []byte(args[1]))26	if err != nil {27		return "", fmt.Errorf("Failed to set asset: %s", args[0])28	}29}30func get(stub shim.ChaincodeStubInterface, args []string) (string, error) {31	if len(args) != 1 {32		return "", fmt.Errorf("Incorrect number of arguments. Expecting 1. Got: %d.", len(args))33	}34	value, err := stub.GetState(args[0])35	if err != nil {36		return "", fmt.Errorf("Failed to get asset: %s with error: %s", args[0], err)37	}38	if value == nil {39		return "", fmt.Errorf("Asset not found: %s", args[0])40	}41	return string(value), nil42}43func main() {44	err := shim.Start(new(SimpleChaincode))45	if err != nil {46		fmt.Printf("Error starting Simple chaincode: %s", err)47	}48}

deserializeHeader

Using AI Code Generation

1import (2func main() {3	db, err := leveldb.OpenFile("C:\\Users\\user\\Desktop\\leveldb", nil)4	if err != nil {5		fmt.Println("Error in opening file")6	}

deserializeHeader

Using AI Code Generation

1import (2func main() {3    db, _ := ethdb.NewMemDatabase()4    header := &types.Header{Number: big.NewInt(1)}5    hash := header.Hash()6    db.Put(hash[:], serializeHeader(header))7    header2 := deserializeHeader(db.Get(hash[:]))8    fmt.Println(header2.Number)9}10import (11func main() {12    db, _ := ethdb.NewMemDatabase()13    header := &types.Header{Number: big.NewInt(1)}14    hash := header.Hash()15    db.Put(hash[:], serializeHeader(header))16    header2 := deserializeHeader(db.Get(hash[:]))17    fmt.Println(header2.Number)18}19import (20func main() {21    db, _ := ethdb.NewMemDatabase()22    header := &types.Header{Number: big.NewInt(1)}23    hash := header.Hash()24    db.Put(hash[:], serializeHeader(header))25    header2 := deserializeHeader(db.Get(hash[:]))26    fmt.Println(header2.Number)27}28import (29func main() {30    db, _ := ethdb.NewMemDatabase()31    header := &types.Header{Number: big.NewInt(1)}32    hash := header.Hash()33    db.Put(hash[:], serializeHeader(header))34    header2 := deserializeHeader(db.Get(hash[:]))35    fmt.Println(header2.Number)36}37import (38func main() {39    db, _ := ethdb.NewMemDatabase()40    header := &types.Header{Number: big.NewInt(1)}41    hash := header.Hash()42    db.Put(hash[:], serializeHeader(header))43    header2 := deserializeHeader(db.Get(hash[:]))44    fmt.Println(header2.Number)45}

deserializeHeader

Using AI Code Generation

1import (2type db struct {3}4func (db *db) deserializeHeader(data string) error {5    err := json.Unmarshal([]byte(data), db)6    if err != nil {7    }8}9func main() {10    data := `{"Name":"test","Version":"1.0"}`11    err := d.deserializeHeader(data)12    if err != nil {13        fmt.Println("Error")14    } else {15        fmt.Println(d.Name)16        fmt.Println(d.Version)17    }18}19import (20type db struct {21}22type deserializer interface {23    deserializeHeader(data string) error24}25func (db *db) deserializeHeader(data string) error {26    err := json.Unmarshal([]byte(data), db)27    if err != nil {28    }29}30func main() {31    data := `{"Name":"test","Version":"1.0"}`32    err := d1.deserializeHeader(data)33    if err != nil {34        fmt.Println("Error")35    } else {36        fmt.Println(d.Name)37        fmt.Println(d.Version)38    }39}40Your name to display (optional):

deserializeHeader

Using AI Code Generation

1db.deserializeHeader("C:/Users/abc/Desktop/1.txt");2db.deserializeHeader("C:/Users/abc/Desktop/1.txt");3db.deserializeHeader("C:/Users/abc/Desktop/1.txt");4db.deserializeHeader("C:/Users/abc/Desktop/1.txt");5db.deserializeHeader("C:/Users/abc/Desktop/1.txt");6db.deserializeHeader("C:/Users/abc/Desktop/1.txt");7db.deserializeHeader("C:/Users/abc/Desktop/1.txt");8db.deserializeHeader("C:/Users/abc/Desktop/1.txt");9db.deserializeHeader("C:/Users/abc/Desktop/1.txt");10db.deserializeHeader("C:/Users/abc/Desktop/1.txt");11db.deserializeHeader("C:/Users/abc/Desktop/1.txt");12db.deserializeHeader("C:/Users/abc/Desktop/1.txt");13db.deserializeHeader("C:/Users/abc/Desktop/1.txt");14db.deserializeHeader("C:/Users/abc/Desktop/1.txt");15db.deserializeHeader("C:/Users/abc/Desktop/1.txt");16db.deserializeHeader("C:/Users/abc/Desktop/1.txt");

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