本文整理匯總了Golang中github.com/ethereum/go-ethereum/ethdb.Database.Get方法的典型用法代碼示例。如果您正苦於以下問題:Golang Database.Get方法的具體用法?Golang Database.Get怎麽用?Golang Database.Get使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/ethereum/go-ethereum/ethdb.Database
的用法示例。
在下文中一共展示了Database.Get方法的15個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1: NewStateObjectFromBytes
func NewStateObjectFromBytes(address common.Address, data []byte, db ethdb.Database) *StateObject {
// TODO clean me up
var extobject struct {
Nonce uint64
Balance *big.Int
Root common.Hash
CodeHash []byte
}
err := rlp.Decode(bytes.NewReader(data), &extobject)
if err != nil {
fmt.Println(err)
return nil
}
object := &StateObject{address: address, db: db}
object.nonce = extobject.Nonce
object.balance = extobject.Balance
object.codeHash = extobject.CodeHash
object.trie = trie.NewSecure(extobject.Root[:], db)
object.storage = make(map[string]common.Hash)
object.gasPool = new(big.Int)
object.code, _ = db.Get(extobject.CodeHash)
return object
}
示例2: GetTransaction
// GetTransaction retrieves a specific transaction from the database, along with
// its added positional metadata.
func GetTransaction(db ethdb.Database, hash common.Hash) (*types.Transaction, common.Hash, uint64, uint64) {
// Retrieve the transaction itself from the database
data, _ := db.Get(hash.Bytes())
if len(data) == 0 {
return nil, common.Hash{}, 0, 0
}
var tx types.Transaction
if err := rlp.DecodeBytes(data, &tx); err != nil {
return nil, common.Hash{}, 0, 0
}
// Retrieve the blockchain positional metadata
data, _ = db.Get(append(hash.Bytes(), txMetaSuffix...))
if len(data) == 0 {
return nil, common.Hash{}, 0, 0
}
var meta struct {
BlockHash common.Hash
BlockIndex uint64
Index uint64
}
if err := rlp.DecodeBytes(data, &meta); err != nil {
return nil, common.Hash{}, 0, 0
}
return &tx, meta.BlockHash, meta.BlockIndex, meta.Index
}
示例3: GetCanonicalHash
// GetCanonicalHash retrieves a hash assigned to a canonical block number.
func GetCanonicalHash(db ethdb.Database, number uint64) common.Hash {
data, _ := db.Get(append(blockNumPrefix, big.NewInt(int64(number)).Bytes()...))
if len(data) == 0 {
return common.Hash{}
}
return common.BytesToHash(data)
}
示例4: NewStateObjectFromBytes
func NewStateObjectFromBytes(address common.Address, data []byte, db ethdb.Database) *StateObject {
var extobject struct {
Nonce uint64
Balance *big.Int
Root common.Hash
CodeHash []byte
}
err := rlp.Decode(bytes.NewReader(data), &extobject)
if err != nil {
glog.Errorf("can't decode state object %x: %v", address, err)
return nil
}
trie, err := trie.NewSecure(extobject.Root, db)
if err != nil {
// TODO: bubble this up or panic
glog.Errorf("can't create account trie with root %x: %v", extobject.Root[:], err)
return nil
}
object := &StateObject{address: address, db: db}
object.nonce = extobject.Nonce
object.balance = extobject.Balance
object.codeHash = extobject.CodeHash
object.trie = trie
object.storage = make(map[string]common.Hash)
object.code, _ = db.Get(extobject.CodeHash)
return object
}
示例5: GetHeadFastBlockHash
// GetHeadFastBlockHash retrieves the hash of the current canonical head block during
// fast synchronization. The difference between this and GetHeadBlockHash is that
// whereas the last block hash is only updated upon a full block import, the last
// fast hash is updated when importing pre-processed blocks.
func GetHeadFastBlockHash(db ethdb.Database) common.Hash {
data, _ := db.Get(headFastKey)
if len(data) == 0 {
return common.Hash{}
}
return common.BytesToHash(data)
}
示例6: saveBlockchainVersion
func saveBlockchainVersion(db ethdb.Database, bcVersion int) {
d, _ := db.Get([]byte("BlockchainVersion"))
blockchainVersion := common.NewValue(d).Uint()
if blockchainVersion == 0 {
db.Put([]byte("BlockchainVersion"), common.NewValue(bcVersion).Bytes())
}
}
示例7: storeProof
// storeProof stores the new trie nodes obtained from a merkle proof in the database
func storeProof(db ethdb.Database, proof []rlp.RawValue) {
for _, buf := range proof {
hash := crypto.Keccak256(buf)
val, _ := db.Get(hash)
if val == nil {
db.Put(hash, buf)
}
}
}
示例8: upgradeChainDatabase
// upgradeChainDatabase ensures that the chain database stores block split into
// separate header and body entries.
func upgradeChainDatabase(db ethdb.Database) error {
// Short circuit if the head block is stored already as separate header and body
data, err := db.Get([]byte("LastBlock"))
if err != nil {
return nil
}
head := common.BytesToHash(data)
if block := core.GetBlockByHashOld(db, head); block == nil {
return nil
}
// At least some of the database is still the old format, upgrade (skip the head block!)
glog.V(logger.Info).Info("Old database detected, upgrading...")
if db, ok := db.(*ethdb.LDBDatabase); ok {
blockPrefix := []byte("block-hash-")
for it := db.NewIterator(); it.Next(); {
// Skip anything other than a combined block
if !bytes.HasPrefix(it.Key(), blockPrefix) {
continue
}
// Skip the head block (merge last to signal upgrade completion)
if bytes.HasSuffix(it.Key(), head.Bytes()) {
continue
}
// Load the block, split and serialize (order!)
block := core.GetBlockByHashOld(db, common.BytesToHash(bytes.TrimPrefix(it.Key(), blockPrefix)))
if err := core.WriteTd(db, block.Hash(), block.DeprecatedTd()); err != nil {
return err
}
if err := core.WriteBody(db, block.Hash(), block.Body()); err != nil {
return err
}
if err := core.WriteHeader(db, block.Header()); err != nil {
return err
}
if err := db.Delete(it.Key()); err != nil {
return err
}
}
// Lastly, upgrade the head block, disabling the upgrade mechanism
current := core.GetBlockByHashOld(db, head)
if err := core.WriteTd(db, current.Hash(), current.DeprecatedTd()); err != nil {
return err
}
if err := core.WriteBody(db, current.Hash(), current.Body()); err != nil {
return err
}
if err := core.WriteHeader(db, current.Header()); err != nil {
return err
}
}
return nil
}
示例9: GetTransaction
func GetTransaction(db ethdb.Database, txhash common.Hash) *types.Transaction {
data, _ := db.Get(txhash[:])
if len(data) != 0 {
var tx types.Transaction
if err := rlp.DecodeBytes(data, &tx); err != nil {
return nil
}
return &tx
}
return nil
}
示例10: GetTd
// GetTd retrieves a block's total difficulty corresponding to the hash, nil if
// none found.
func GetTd(db ethdb.Database, hash common.Hash) *big.Int {
data, _ := db.Get(append(append(blockPrefix, hash.Bytes()...), tdSuffix...))
if len(data) == 0 {
return nil
}
td := new(big.Int)
if err := rlp.Decode(bytes.NewReader(data), td); err != nil {
glog.V(logger.Error).Infof("invalid block total difficulty RLP for hash %x: %v", hash, err)
return nil
}
return td
}
示例11: GetBlockByHashOld
// [deprecated by the header/block split, remove eventually]
// GetBlockByHashOld returns the old combined block corresponding to the hash
// or nil if not found. This method is only used by the upgrade mechanism to
// access the old combined block representation. It will be dropped after the
// network transitions to eth/63.
func GetBlockByHashOld(db ethdb.Database, hash common.Hash) *types.Block {
data, _ := db.Get(append(blockHashPrefix, hash[:]...))
if len(data) == 0 {
return nil
}
var block types.StorageBlock
if err := rlp.Decode(bytes.NewReader(data), &block); err != nil {
glog.V(logger.Error).Infof("invalid block RLP for hash %x: %v", hash, err)
return nil
}
return (*types.Block)(&block)
}
示例12: GetReceipt
// GetReceipt returns a receipt by hash
func GetReceipt(db ethdb.Database, txHash common.Hash) *types.Receipt {
data, _ := db.Get(append(receiptsPrefix, txHash[:]...))
if len(data) == 0 {
return nil
}
var receipt types.ReceiptForStorage
err := rlp.DecodeBytes(data, &receipt)
if err != nil {
glog.V(logger.Core).Infoln("GetReceipt err:", err)
}
return (*types.Receipt)(&receipt)
}
示例13: GetBlockReceipts
// GetBlockReceipts returns the receipts generated by the transactions
// included in block's given hash.
func GetBlockReceipts(db ethdb.Database, hash common.Hash) types.Receipts {
data, _ := db.Get(append(blockReceiptsPre, hash[:]...))
if len(data) == 0 {
return nil
}
var receipts types.Receipts
err := rlp.DecodeBytes(data, &receipts)
if err != nil {
glog.V(logger.Core).Infoln("GetReceiptse err", err)
}
return receipts
}
示例14: GetChainConfig
// GetChainConfig will fetch the network settings based on the given hash.
func GetChainConfig(db ethdb.Database, hash common.Hash) (*ChainConfig, error) {
jsonChainConfig, _ := db.Get(append(configPrefix, hash[:]...))
if len(jsonChainConfig) == 0 {
return nil, ChainConfigNotFoundErr
}
var config ChainConfig
if err := json.Unmarshal(jsonChainConfig, &config); err != nil {
return nil, err
}
return &config, nil
}
示例15: GetBlockReceipts
// GetBlockReceipts retrieves the receipts generated by the transactions included
// in a block given by its hash.
func GetBlockReceipts(db ethdb.Database, hash common.Hash) types.Receipts {
data, _ := db.Get(append(blockReceiptsPrefix, hash[:]...))
if len(data) == 0 {
return nil
}
storageReceipts := []*types.ReceiptForStorage{}
if err := rlp.DecodeBytes(data, &storageReceipts); err != nil {
glog.V(logger.Error).Infof("invalid receipt array RLP for hash %x: %v", hash, err)
return nil
}
receipts := make(types.Receipts, len(storageReceipts))
for i, receipt := range storageReceipts {
receipts[i] = (*types.Receipt)(receipt)
}
return receipts
}