rawdb

package
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 Go to latest Published: Jan 29, 2024 License: GPL-3.0 Imports: 35 Imported by: 0

Documentation

Overview

Package rawdb contains a collection of low level database accessors.

Index

Constants

View Source 
const (
	StateSyncUnknown  = uint8(0) // flags the state snap sync is unknown
	StateSyncRunning  = uint8(1) // flags the state snap sync is not completed yet
	StateSyncFinished = uint8(2) // flags the state snap sync is completed
)
View Source 
const (
	// ChainFreezerHeaderTable indicates the name of the freezer header table.
	ChainFreezerHeaderTable = "headers"

	// ChainFreezerHashTable indicates the name of the freezer canonical hash table.
	ChainFreezerHashTable = "hashes"

	// ChainFreezerBodiesTable indicates the name of the freezer block body table.
	ChainFreezerBodiesTable = "bodies"

	// ChainFreezerReceiptTable indicates the name of the freezer receipts table.
	ChainFreezerReceiptTable = "receipts"

	// ChainFreezerDifficultyTable indicates the name of the freezer total difficulty table.
	ChainFreezerDifficultyTable = "diffs"
)

The list of table names of chain freezer.

View Source 
const HashScheme = "hash"

HashScheme is the legacy hash-based state scheme with which trie nodes are stored in the disk with node hash as the database key. The advantage of this scheme is that different versions of trie nodes can be stored in disk, which is very beneficial for constructing archive nodes. The drawback is it will store different trie nodes on the same path to different locations on the disk with no data locality, and it's unfriendly for designing state pruning.

Now this scheme is still kept for backward compatibility, and it will be used for archive node and some other tries(e.g. light trie).

View Source 
const PathScheme = "path"

PathScheme is the new path-based state scheme with which trie nodes are stored in the disk with node path as the database key. This scheme will only store one version of state data in the disk, which means that the state pruning operation is native. At the same time, this scheme will put adjacent trie nodes in the same area of the disk with good data locality property. But this scheme needs to rely on extra state diffs to survive deep reorg.

Variables

View Source 
var (

	// SnapshotRootKey tracks the hash of the last snapshot.
	SnapshotRootKey = []byte("SnapshotRoot")

	SnapshotAccountPrefix = []byte("a") // SnapshotAccountPrefix + account hash -> account trie value
	SnapshotStoragePrefix = []byte("o") // SnapshotStoragePrefix + account hash + storage hash -> storage trie value
	CodePrefix            = []byte("c") // CodePrefix + code hash -> account code

	PreimagePrefix = []byte("secure-key-") // PreimagePrefix + hash -> preimage

	// BloomBitsIndexPrefix is the data table of a chain indexer to track its progress
	BloomBitsIndexPrefix = []byte("iB")

	ChtPrefix           = []byte("chtRootV2-") // ChtPrefix + chtNum (uint64 big endian) -> trie root hash
	ChtTablePrefix      = []byte("cht-")
	ChtIndexTablePrefix = []byte("chtIndexV2-")

	BloomTriePrefix      = []byte("bltRoot-") // BloomTriePrefix + bloomTrieNum (uint64 big endian) -> trie root hash
	BloomTrieTablePrefix = []byte("blt-")
	BloomTrieIndexPrefix = []byte("bltIndex-")

	CliqueSnapshotPrefix = []byte("clique-")
)

The fields below define the low level database schema prefixing.

Functions

func DeleteAccountSnapshot 

func DeleteAccountSnapshot(db ethdb.KeyValueWriter, hash common.Hash)

DeleteAccountSnapshot removes the snapshot entry of an account trie leaf.

func DeleteAccountTrieNode 

func DeleteAccountTrieNode(db ethdb.KeyValueWriter, path []byte)

DeleteAccountTrieNode deletes the specified account trie node from the database.

func DeleteBadBlocks 

func DeleteBadBlocks(db ethdb.KeyValueWriter)

DeleteBadBlocks deletes all the bad blocks from the database

func DeleteBlock 

func DeleteBlock(db ethdb.KeyValueWriter, hash common.Hash, number uint64)

DeleteBlock removes all block data associated with a hash.

func DeleteBlockWithoutNumber 

func DeleteBlockWithoutNumber(db ethdb.KeyValueWriter, hash common.Hash, number uint64)

DeleteBlockWithoutNumber removes all block data associated with a hash, except the hash to number mapping.

func DeleteBloombits 

func DeleteBloombits(db ethdb.Database, bit uint, from uint64, to uint64)

DeleteBloombits removes all compressed bloom bits vector belonging to the given section range and bit index.

func DeleteBody 

func DeleteBody(db ethdb.KeyValueWriter, hash common.Hash, number uint64)

DeleteBody removes all block body data associated with a hash.

func DeleteCanonicalHash 

func DeleteCanonicalHash(db ethdb.KeyValueWriter, number uint64)

DeleteCanonicalHash removes the number to hash canonical mapping.

func DeleteCode 

func DeleteCode(db ethdb.KeyValueWriter, hash common.Hash)

DeleteCode deletes the specified contract code from the database.

func DeleteHeader 

func DeleteHeader(db ethdb.KeyValueWriter, hash common.Hash, number uint64)

DeleteHeader removes all block header data associated with a hash.

func DeleteHeaderNumber 

func DeleteHeaderNumber(db ethdb.KeyValueWriter, hash common.Hash)

DeleteHeaderNumber removes hash->number mapping.

func DeleteLegacyTrieNode 

func DeleteLegacyTrieNode(db ethdb.KeyValueWriter, hash common.Hash)

DeleteLegacyTrieNode deletes the specified legacy trie node from database.

func DeleteReceipts 

func DeleteReceipts(db ethdb.KeyValueWriter, hash common.Hash, number uint64)

DeleteReceipts removes all receipt data associated with a block hash.

func DeleteSkeletonHeader 

func DeleteSkeletonHeader(db ethdb.KeyValueWriter, number uint64)

DeleteSkeletonHeader removes all block header data associated with a hash.

func DeleteSkeletonSyncStatus 

func DeleteSkeletonSyncStatus(db ethdb.KeyValueWriter)

DeleteSkeletonSyncStatus deletes the serialized sync status saved at the last shutdown

func DeleteSnapshotDisabled 

func DeleteSnapshotDisabled(db ethdb.KeyValueWriter)

DeleteSnapshotDisabled deletes the flag keeping the snapshot maintenance disabled.

func DeleteSnapshotGenerator 

func DeleteSnapshotGenerator(db ethdb.KeyValueWriter)

DeleteSnapshotGenerator deletes the serialized snapshot generator saved at the last shutdown

func DeleteSnapshotJournal 

func DeleteSnapshotJournal(db ethdb.KeyValueWriter)

DeleteSnapshotJournal deletes the serialized in-memory diff layers saved at the last shutdown

func DeleteSnapshotRecoveryNumber 

func DeleteSnapshotRecoveryNumber(db ethdb.KeyValueWriter)

DeleteSnapshotRecoveryNumber deletes the block number of the last persisted snapshot layer.

func DeleteSnapshotRoot 

func DeleteSnapshotRoot(db ethdb.KeyValueWriter)

DeleteSnapshotRoot deletes the hash of the block whose state is contained in the persisted snapshot. Since snapshots are not immutable, this method can be used during updates, so a crash or failure will mark the entire snapshot invalid.

func DeleteStateID 

func DeleteStateID(db ethdb.KeyValueWriter, root common.Hash)

DeleteStateID deletes the specified state lookup from the database.

func DeleteStorageSnapshot 

func DeleteStorageSnapshot(db ethdb.KeyValueWriter, accountHash, storageHash common.Hash)

DeleteStorageSnapshot removes the snapshot entry of an storage trie leaf.

func DeleteStorageTrieNode 

func DeleteStorageTrieNode(db ethdb.KeyValueWriter, accountHash common.Hash, path []byte)

DeleteStorageTrieNode deletes the specified storage trie node from the database.

func DeleteTd 

func DeleteTd(db ethdb.KeyValueWriter, hash common.Hash, number uint64)

DeleteTd removes all block total difficulty data associated with a hash.

func DeleteTrieJournal 

func DeleteTrieJournal(db ethdb.KeyValueWriter)

DeleteTrieJournal deletes the serialized in-memory trie nodes of layers saved at the last shutdown.

func DeleteTrieNode 

func DeleteTrieNode(db ethdb.KeyValueWriter, owner common.Hash, path []byte, hash common.Hash, scheme string)

DeleteTrieNode deletes the trie node from database with the provided node info and associated node hash. hashScheme-based lookup requires the following:

  • hash

pathScheme-based lookup requires the following:

  • owner
  • path

func DeleteTxLookupEntries 

func DeleteTxLookupEntries(db ethdb.KeyValueWriter, hashes []common.Hash)

DeleteTxLookupEntries removes all transaction lookups for a given block.

func DeleteTxLookupEntry 

func DeleteTxLookupEntry(db ethdb.KeyValueWriter, hash common.Hash)

DeleteTxLookupEntry removes all transaction data associated with a hash.

func ExistsAccountTrieNode 

func ExistsAccountTrieNode(db ethdb.KeyValueReader, path []byte) bool

ExistsAccountTrieNode checks the presence of the account trie node with the specified node path, regardless of the node hash.

func ExistsStorageTrieNode 

func ExistsStorageTrieNode(db ethdb.KeyValueReader, accountHash common.Hash, path []byte) bool

ExistsStorageTrieNode checks the presence of the storage trie node with the specified account hash and node path, regardless of the node hash.

func FindCommonAncestor 

func FindCommonAncestor(db ethdb.Reader, a, b *types.Header) *types.Header

FindCommonAncestor returns the last common ancestor of two block headers

func HasAccountTrieNode 

func HasAccountTrieNode(db ethdb.KeyValueReader, path []byte, hash common.Hash) bool

HasAccountTrieNode checks the account trie node presence with the specified node path and the associated node hash.

func HasBody 

func HasBody(db ethdb.Reader, hash common.Hash, number uint64) bool

HasBody verifies the existence of a block body corresponding to the hash.

func HasCode 

func HasCode(db ethdb.KeyValueReader, hash common.Hash) bool

HasCode checks if the contract code corresponding to the provided code hash is present in the db.

func HasCodeWithPrefix 

func HasCodeWithPrefix(db ethdb.KeyValueReader, hash common.Hash) bool

HasCodeWithPrefix checks if the contract code corresponding to the provided code hash is present in the db. This function will only check presence using the prefix-scheme.

func HasHeader 

func HasHeader(db ethdb.Reader, hash common.Hash, number uint64) bool

HasHeader verifies the existence of a block header corresponding to the hash.

func HasLegacyTrieNode 

func HasLegacyTrieNode(db ethdb.KeyValueReader, hash common.Hash) bool

HasLegacyTrieNode checks if the trie node with the provided hash is present in db.

func HasReceipts 

func HasReceipts(db ethdb.Reader, hash common.Hash, number uint64) bool

HasReceipts verifies the existence of all the transaction receipts belonging to a block.

func HasStorageTrieNode 

func HasStorageTrieNode(db ethdb.KeyValueReader, accountHash common.Hash, path []byte, hash common.Hash) bool

HasStorageTrieNode checks the storage trie node presence with the provided node path and the associated node hash.

func HasTrieNode 

func HasTrieNode(db ethdb.KeyValueReader, owner common.Hash, path []byte, hash common.Hash, scheme string) bool

HasTrieNode checks the trie node presence with the provided node info and the associated node hash.

func IndexTransactions 

func IndexTransactions(db ethdb.Database, from uint64, to uint64, interrupt chan struct{})

IndexTransactions creates txlookup indices of the specified block range. The from is included while to is excluded.

This function iterates canonical chain in reverse order, it has one main advantage: We can write tx index tail flag periodically even without the whole indexing procedure is finished. So that we can resume indexing procedure next time quickly.

There is a passed channel, the whole procedure will be interrupted if any signal received.

func InitDatabaseFromFreezer 

func InitDatabaseFromFreezer(db ethdb.Database)

InitDatabaseFromFreezer reinitializes an empty database from a previous batch of frozen ancient blocks. The method iterates over all the frozen blocks and injects into the database the block hash->number mappings.

func InspectDatabase 

func InspectDatabase(db ethdb.Database, keyPrefix, keyStart []byte) error

InspectDatabase traverses the entire database and checks the size of all different categories of data.

func InspectFreezerTable 

func InspectFreezerTable(ancient string, freezerName string, tableName string, start, end int64) error

InspectFreezerTable dumps out the index of a specific freezer table. The passed ancient indicates the path of root ancient directory where the chain freezer can be opened. Start and end specify the range for dumping out indexes. Note this function can only be used for debugging purposes.

func IsAccountTrieNode 

func IsAccountTrieNode(key []byte) bool

IsAccountTrieNode reports whether a provided database entry is an account trie node in path-based state scheme.

func IsCodeKey 

func IsCodeKey(key []byte) (bool, []byte)

IsCodeKey reports whether the given byte slice is the key of contract code, if so return the raw code hash as well.

func IsLegacyTrieNode 

func IsLegacyTrieNode(key []byte, val []byte) bool

IsLegacyTrieNode reports whether a provided database entry is a legacy trie node. The characteristics of legacy trie node are: - the key length is 32 bytes - the key is the hash of val

func IsStorageTrieNode 

func IsStorageTrieNode(key []byte) bool

IsStorageTrieNode reports whether a provided database entry is a storage trie node in path-based state scheme.

func IterateStorageSnapshots 

func IterateStorageSnapshots(db ethdb.Iteratee, accountHash common.Hash) ethdb.Iterator

IterateStorageSnapshots returns an iterator for walking the entire storage space of a specific account.

func NewDatabase 

func NewDatabase(db ethdb.KeyValueStore) ethdb.Database

NewDatabase creates a high level database on top of a given key-value data store without a freezer moving immutable chain segments into cold storage.

func NewDatabaseWithFreezer 

func NewDatabaseWithFreezer(db ethdb.KeyValueStore, ancient string, namespace string, readonly bool) (ethdb.Database, error)

NewDatabaseWithFreezer creates a high level database on top of a given key- value data store with a freezer moving immutable chain segments into cold storage. The passed ancient indicates the path of root ancient directory where the chain freezer can be opened.

func NewKeyLengthIterator 

func NewKeyLengthIterator(it ethdb.Iterator, keyLen int) ethdb.Iterator

NewKeyLengthIterator returns a wrapped version of the iterator that will only return key-value pairs where keys with a specific key length will be returned.

func NewLevelDBDatabase 

func NewLevelDBDatabase(file string, cache int, handles int, namespace string, readonly bool) (ethdb.Database, error)

NewLevelDBDatabase creates a persistent key-value database without a freezer moving immutable chain segments into cold storage.

func NewMemoryDatabase 

func NewMemoryDatabase() ethdb.Database

NewMemoryDatabase creates an ephemeral in-memory key-value database without a freezer moving immutable chain segments into cold storage.

func NewMemoryDatabaseWithCap 

func NewMemoryDatabaseWithCap(size int) ethdb.Database

NewMemoryDatabaseWithCap creates an ephemeral in-memory key-value database with an initial starting capacity, but without a freezer moving immutable chain segments into cold storage.

func NewPebbleDBDatabase 

func NewPebbleDBDatabase(file string, cache int, handles int, namespace string, readonly, ephemeral bool) (ethdb.Database, error)

NewPebbleDBDatabase creates a persistent key-value database without a freezer moving immutable chain segments into cold storage.

func NewTable 

func NewTable(db ethdb.Database, prefix string) ethdb.Database

NewTable returns a database object that prefixes all keys with a given string.

func Open 

func Open(o OpenOptions) (ethdb.Database, error)

Open opens both a disk-based key-value database such as leveldb or pebble, but also integrates it with a freezer database -- if the AncientDir option has been set on the provided OpenOptions. The passed o.AncientDir indicates the path of root ancient directory where the chain freezer can be opened.

func ParseStateScheme 

func ParseStateScheme(provided string, disk ethdb.Database) (string, error)

ParseStateScheme checks if the specified state scheme is compatible with the stored state.

  • If the provided scheme is none, use the scheme consistent with persistent state, or fallback to hash-based scheme if state is empty.

  • If the provided scheme is hash, use hash-based scheme or error out if not compatible with persistent state scheme.

  • If the provided scheme is path: use path-based scheme or error out if not compatible with persistent state scheme.

func PopUncleanShutdownMarker 

func PopUncleanShutdownMarker(db ethdb.KeyValueStore)

PopUncleanShutdownMarker removes the last unclean shutdown marker

func PreexistingDatabase 

func PreexistingDatabase(path string) string

PreexistingDatabase checks the given data directory whether a database is already instantiated at that location, and if so, returns the type of database (or the empty string).

func PushUncleanShutdownMarker 

func PushUncleanShutdownMarker(db ethdb.KeyValueStore) ([]uint64, uint64, error)

PushUncleanShutdownMarker appends a new unclean shutdown marker and returns the previous data - a list of timestamps - a count of how many old unclean-shutdowns have been discarded

func ReadAccountSnapshot 

func ReadAccountSnapshot(db ethdb.KeyValueReader, hash common.Hash) []byte

ReadAccountSnapshot retrieves the snapshot entry of an account trie leaf.

func ReadAccountTrieNode 

func ReadAccountTrieNode(db ethdb.KeyValueReader, path []byte) ([]byte, common.Hash)

ReadAccountTrieNode retrieves the account trie node and the associated node hash with the specified node path.

func ReadAllBadBlocks 

func ReadAllBadBlocks(db ethdb.Reader) []*types.Block

ReadAllBadBlocks retrieves all the bad blocks in the database. All returned blocks are sorted in reverse order by number.

func ReadAllCanonicalHashes 

func ReadAllCanonicalHashes(db ethdb.Iteratee, from uint64, to uint64, limit int) ([]uint64, []common.Hash)

ReadAllCanonicalHashes retrieves all canonical number and hash mappings at the certain chain range. If the accumulated entries reaches the given threshold, abort the iteration and return the semi-finish result.

func ReadAllHashes 

func ReadAllHashes(db ethdb.Iteratee, number uint64) []common.Hash

ReadAllHashes retrieves all the hashes assigned to blocks at a certain heights, both canonical and reorged forks included.

func ReadBadBlock 

func ReadBadBlock(db ethdb.Reader, hash common.Hash) *types.Block

ReadBadBlock retrieves the bad block with the corresponding block hash.

func ReadBlock 

func ReadBlock(db ethdb.Reader, hash common.Hash, number uint64) *types.Block

ReadBlock retrieves an entire block corresponding to the hash, assembling it back from the stored header and body. If either the header or body could not be retrieved nil is returned.

Note, due to concurrent download of header and block body the header and thus canonical hash can be stored in the database but the body data not (yet).

func ReadBloomBits 

func ReadBloomBits(db ethdb.KeyValueReader, bit uint, section uint64, head common.Hash) ([]byte, error)

ReadBloomBits retrieves the compressed bloom bit vector belonging to the given section and bit index from the.

func ReadBody 

func ReadBody(db ethdb.Reader, hash common.Hash, number uint64) *types.Body

ReadBody retrieves the block body corresponding to the hash.

func ReadBodyRLP 

func ReadBodyRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue

ReadBodyRLP retrieves the block body (transactions and uncles) in RLP encoding.

func ReadCanonicalBodyRLP 

func ReadCanonicalBodyRLP(db ethdb.Reader, number uint64) rlp.RawValue

ReadCanonicalBodyRLP retrieves the block body (transactions and uncles) for the canonical block at number, in RLP encoding.

func ReadCanonicalHash 

func ReadCanonicalHash(db ethdb.Reader, number uint64) common.Hash

ReadCanonicalHash retrieves the hash assigned to a canonical block number.

func ReadChainConfig 

func ReadChainConfig(db ethdb.KeyValueReader, hash common.Hash) *params.ChainConfig

ReadChainConfig retrieves the consensus settings based on the given genesis hash.

func ReadChainMetadata 

func ReadChainMetadata(db ethdb.KeyValueStore) [][]string

ReadChainMetadata returns a set of key/value pairs that contains information about the database chain status. This can be used for diagnostic purposes when investigating the state of the node.

func ReadCode 

func ReadCode(db ethdb.KeyValueReader, hash common.Hash) []byte

ReadCode retrieves the contract code of the provided code hash.

func ReadCodeWithPrefix 

func ReadCodeWithPrefix(db ethdb.KeyValueReader, hash common.Hash) []byte

ReadCodeWithPrefix retrieves the contract code of the provided code hash. The main difference between this function and ReadCode is this function will only check the existence with latest scheme(with prefix).

func ReadDatabaseVersion 

func ReadDatabaseVersion(db ethdb.KeyValueReader) *uint64

ReadDatabaseVersion retrieves the version number of the database.

func ReadFastTxLookupLimit 

func ReadFastTxLookupLimit(db ethdb.KeyValueReader) *uint64

ReadFastTxLookupLimit retrieves the tx lookup limit used in fast sync.

func ReadFinalizedBlockHash 

func ReadFinalizedBlockHash(db ethdb.KeyValueReader) common.Hash

ReadFinalizedBlockHash retrieves the hash of the finalized block.

func ReadGenesisStateSpec 

func ReadGenesisStateSpec(db ethdb.KeyValueReader, blockhash common.Hash) []byte

ReadGenesisStateSpec retrieves the genesis state specification based on the given genesis (block-)hash.

func ReadHeadBlock 

func ReadHeadBlock(db ethdb.Reader) *types.Block

ReadHeadBlock returns the current canonical head block.

func ReadHeadBlockHash 

func ReadHeadBlockHash(db ethdb.KeyValueReader) common.Hash

ReadHeadBlockHash retrieves the hash of the current canonical head block.

func ReadHeadFastBlockHash 

func ReadHeadFastBlockHash(db ethdb.KeyValueReader) common.Hash

ReadHeadFastBlockHash retrieves the hash of the current fast-sync head block.

func ReadHeadHeader 

func ReadHeadHeader(db ethdb.Reader) *types.Header

ReadHeadHeader returns the current canonical head header.

func ReadHeadHeaderHash 

func ReadHeadHeaderHash(db ethdb.KeyValueReader) common.Hash

ReadHeadHeaderHash retrieves the hash of the current canonical head header.

func ReadHeader 

func ReadHeader(db ethdb.Reader, hash common.Hash, number uint64) *types.Header

ReadHeader retrieves the block header corresponding to the hash.

func ReadHeaderNumber 

func ReadHeaderNumber(db ethdb.KeyValueReader, hash common.Hash) *uint64

ReadHeaderNumber returns the header number assigned to a hash.

func ReadHeaderRLP 

func ReadHeaderRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue

ReadHeaderRLP retrieves a block header in its raw RLP database encoding.

func ReadHeaderRange 

func ReadHeaderRange(db ethdb.Reader, number uint64, count uint64) []rlp.RawValue

ReadHeaderRange returns the rlp-encoded headers, starting at 'number', and going backwards towards genesis. This method assumes that the caller already has placed a cap on count, to prevent DoS issues. Since this method operates in head-towards-genesis mode, it will return an empty slice in case the head ('number') is missing. Hence, the caller must ensure that the head ('number') argument is actually an existing header.

N.B: Since the input is a number, as opposed to a hash, it's implicit that this method only operates on canon headers.

func ReadLastPivotNumber 

func ReadLastPivotNumber(db ethdb.KeyValueReader) *uint64

ReadLastPivotNumber retrieves the number of the last pivot block. If the node full synced, the last pivot will always be nil.

func ReadLegacyTrieNode 

func ReadLegacyTrieNode(db ethdb.KeyValueReader, hash common.Hash) []byte

ReadLegacyTrieNode retrieves the legacy trie node with the given associated node hash.

func ReadLogs 

func ReadLogs(db ethdb.Reader, hash common.Hash, number uint64) [][]*types.Log

ReadLogs retrieves the logs for all transactions in a block. In case receipts is not found, a nil is returned. Note: ReadLogs does not derive unstored log fields.

func ReadPersistentStateID 

func ReadPersistentStateID(db ethdb.KeyValueReader) uint64

ReadPersistentStateID retrieves the id of the persistent state from the database.

func ReadPreimage 

func ReadPreimage(db ethdb.KeyValueReader, hash common.Hash) []byte

ReadPreimage retrieves a single preimage of the provided hash.

func ReadRawReceipts 

func ReadRawReceipts(db ethdb.Reader, hash common.Hash, number uint64) types.Receipts

ReadRawReceipts retrieves all the transaction receipts belonging to a block. The receipt metadata fields are not guaranteed to be populated, so they should not be used. Use ReadReceipts instead if the metadata is needed.

func ReadReceipt 

func ReadReceipt(db ethdb.Reader, hash common.Hash, config *params.ChainConfig) (*types.Receipt, common.Hash, uint64, uint64)

ReadReceipt retrieves a specific transaction receipt from the database, along with its added positional metadata.

func ReadReceipts 

func ReadReceipts(db ethdb.Reader, hash common.Hash, number uint64, time uint64, config *params.ChainConfig) types.Receipts

ReadReceipts retrieves all the transaction receipts belonging to a block, including its corresponding metadata fields. If it is unable to populate these metadata fields then nil is returned.

The current implementation populates these metadata fields by reading the receipts' corresponding block body, so if the block body is not found it will return nil even if the receipt itself is stored.

func ReadReceiptsRLP 

func ReadReceiptsRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue

ReadReceiptsRLP retrieves all the transaction receipts belonging to a block in RLP encoding.

func ReadSkeletonHeader 

func ReadSkeletonHeader(db ethdb.KeyValueReader, number uint64) *types.Header

ReadSkeletonHeader retrieves a block header from the skeleton sync store,

func ReadSkeletonSyncStatus 

func ReadSkeletonSyncStatus(db ethdb.KeyValueReader) []byte

ReadSkeletonSyncStatus retrieves the serialized sync status saved at shutdown.

func ReadSnapSyncStatusFlag 

func ReadSnapSyncStatusFlag(db ethdb.KeyValueReader) uint8

ReadSnapSyncStatusFlag retrieves the state snap sync status flag.

func ReadSnapshotDisabled 

func ReadSnapshotDisabled(db ethdb.KeyValueReader) bool

ReadSnapshotDisabled retrieves if the snapshot maintenance is disabled.

func ReadSnapshotGenerator 

func ReadSnapshotGenerator(db ethdb.KeyValueReader) []byte

ReadSnapshotGenerator retrieves the serialized snapshot generator saved at the last shutdown.

func ReadSnapshotJournal 

func ReadSnapshotJournal(db ethdb.KeyValueReader) []byte

ReadSnapshotJournal retrieves the serialized in-memory diff layers saved at the last shutdown. The blob is expected to be max a few 10s of megabytes.

func ReadSnapshotRecoveryNumber 

func ReadSnapshotRecoveryNumber(db ethdb.KeyValueReader) *uint64

ReadSnapshotRecoveryNumber retrieves the block number of the last persisted snapshot layer.

func ReadSnapshotRoot 

func ReadSnapshotRoot(db ethdb.KeyValueReader) common.Hash

ReadSnapshotRoot retrieves the root of the block whose state is contained in the persisted snapshot.

func ReadSnapshotSyncStatus 

func ReadSnapshotSyncStatus(db ethdb.KeyValueReader) []byte

ReadSnapshotSyncStatus retrieves the serialized sync status saved at shutdown.

func ReadStateAccountHistory 

func ReadStateAccountHistory(db ethdb.AncientReaderOp, id uint64) []byte

ReadStateAccountHistory retrieves the state root corresponding to the specified state history. Compute the position of state history in freezer by minus one since the id of first state history starts from one(zero for initial state).

func ReadStateAccountIndex 

func ReadStateAccountIndex(db ethdb.AncientReaderOp, id uint64) []byte

ReadStateAccountIndex retrieves the state root corresponding to the specified state history. Compute the position of state history in freezer by minus one since the id of first state history starts from one(zero for initial state).

func ReadStateHistory 

func ReadStateHistory(db ethdb.AncientReaderOp, id uint64) ([]byte, []byte, []byte, []byte, []byte, error)

ReadStateHistory retrieves the state history from database with provided id. Compute the position of state history in freezer by minus one since the id of first state history starts from one(zero for initial state).

func ReadStateHistoryMeta 

func ReadStateHistoryMeta(db ethdb.AncientReaderOp, id uint64) []byte

ReadStateHistoryMeta retrieves the metadata corresponding to the specified state history. Compute the position of state history in freezer by minus one since the id of first state history starts from one(zero for initial state).

func ReadStateHistoryMetaList 

func ReadStateHistoryMetaList(db ethdb.AncientReaderOp, start uint64, count uint64) ([][]byte, error)

ReadStateHistoryMetaList retrieves a batch of meta objects with the specified start position and count. Compute the position of state history in freezer by minus one since the id of first state history starts from one(zero for initial state).

func ReadStateID 

func ReadStateID(db ethdb.KeyValueReader, root common.Hash) *uint64

ReadStateID retrieves the state id with the provided state root.

func ReadStateScheme 

func ReadStateScheme(db ethdb.Reader) string

ReadStateScheme reads the state scheme of persistent state, or none if the state is not present in database.

func ReadStateStorageHistory 

func ReadStateStorageHistory(db ethdb.AncientReaderOp, id uint64) []byte

ReadStateStorageHistory retrieves the state root corresponding to the specified state history. Compute the position of state history in freezer by minus one since the id of first state history starts from one(zero for initial state).

func ReadStateStorageIndex 

func ReadStateStorageIndex(db ethdb.AncientReaderOp, id uint64) []byte

ReadStateStorageIndex retrieves the state root corresponding to the specified state history. Compute the position of state history in freezer by minus one since the id of first state history starts from one(zero for initial state).

func ReadStorageSnapshot 

func ReadStorageSnapshot(db ethdb.KeyValueReader, accountHash, storageHash common.Hash) []byte

ReadStorageSnapshot retrieves the snapshot entry of an storage trie leaf.

func ReadStorageTrieNode 

func ReadStorageTrieNode(db ethdb.KeyValueReader, accountHash common.Hash, path []byte) ([]byte, common.Hash)

ReadStorageTrieNode retrieves the storage trie node and the associated node hash with the specified node path.

func ReadTd 

func ReadTd(db ethdb.Reader, hash common.Hash, number uint64) *big.Int

ReadTd retrieves a block's total difficulty corresponding to the hash.

func ReadTdRLP 

func ReadTdRLP(db ethdb.Reader, hash common.Hash, number uint64) rlp.RawValue

ReadTdRLP retrieves a block's total difficulty corresponding to the hash in RLP encoding.

func ReadTransaction 

func ReadTransaction(db ethdb.Reader, hash common.Hash) (*types.Transaction, common.Hash, uint64, uint64)

ReadTransaction retrieves a specific transaction from the database, along with its added positional metadata.

func ReadTransitionStatus 

func ReadTransitionStatus(db ethdb.KeyValueReader) []byte

ReadTransitionStatus retrieves the eth2 transition status from the database

func ReadTrieJournal 

func ReadTrieJournal(db ethdb.KeyValueReader) []byte

ReadTrieJournal retrieves the serialized in-memory trie nodes of layers saved at the last shutdown.

func ReadTrieNode 

func ReadTrieNode(db ethdb.KeyValueReader, owner common.Hash, path []byte, hash common.Hash, scheme string) []byte

ReadTrieNode retrieves the trie node from database with the provided node info and associated node hash. hashScheme-based lookup requires the following:

  • hash

pathScheme-based lookup requires the following:

  • owner
  • path

func ReadTxIndexTail 

func ReadTxIndexTail(db ethdb.KeyValueReader) *uint64

ReadTxIndexTail retrieves the number of oldest indexed block whose transaction indices has been indexed.

func ReadTxLookupEntry 

func ReadTxLookupEntry(db ethdb.Reader, hash common.Hash) *uint64

ReadTxLookupEntry retrieves the positional metadata associated with a transaction hash to allow retrieving the transaction or receipt by hash.

func ResolveAccountTrieNodeKey 

func ResolveAccountTrieNodeKey(key []byte) (bool, []byte)

ResolveAccountTrieNodeKey reports whether a provided database entry is an account trie node in path-based state scheme, and returns the resolved node path if so.

func ResolveStorageTrieNode 

func ResolveStorageTrieNode(key []byte) (bool, common.Hash, []byte)

ResolveStorageTrieNode reports whether a provided database entry is a storage trie node in path-based state scheme, and returns the resolved account hash and node path if so.

func UnindexTransactions 

func UnindexTransactions(db ethdb.Database, from uint64, to uint64, interrupt chan struct{})

UnindexTransactions removes txlookup indices of the specified block range. The from is included while to is excluded.

There is a passed channel, the whole procedure will be interrupted if any signal received.

func UpdateUncleanShutdownMarker 

func UpdateUncleanShutdownMarker(db ethdb.KeyValueStore)

UpdateUncleanShutdownMarker updates the last marker's timestamp to now.

func WriteAccountSnapshot 

func WriteAccountSnapshot(db ethdb.KeyValueWriter, hash common.Hash, entry []byte)

WriteAccountSnapshot stores the snapshot entry of an account trie leaf.

func WriteAccountTrieNode 

func WriteAccountTrieNode(db ethdb.KeyValueWriter, path []byte, node []byte)

WriteAccountTrieNode writes the provided account trie node into database.

func WriteAncientBlocks 

func WriteAncientBlocks(db ethdb.AncientWriter, blocks []*types.Block, receipts []types.Receipts, td *big.Int) (int64, error)

WriteAncientBlocks writes entire block data into ancient store and returns the total written size.

func WriteBadBlock 

func WriteBadBlock(db ethdb.KeyValueStore, block *types.Block)

WriteBadBlock serializes the bad block into the database. If the cumulated bad blocks exceeds the limitation, the oldest will be dropped.

func WriteBlock 

func WriteBlock(db ethdb.KeyValueWriter, block *types.Block)

WriteBlock serializes a block into the database, header and body separately.

func WriteBloomBits 

func WriteBloomBits(db ethdb.KeyValueWriter, bit uint, section uint64, head common.Hash, bits []byte)

WriteBloomBits stores the compressed bloom bits vector belonging to the given section and bit index.

func WriteBody 

func WriteBody(db ethdb.KeyValueWriter, hash common.Hash, number uint64, body *types.Body)

WriteBody stores a block body into the database.

func WriteBodyRLP 

func WriteBodyRLP(db ethdb.KeyValueWriter, hash common.Hash, number uint64, rlp rlp.RawValue)

WriteBodyRLP stores an RLP encoded block body into the database.

func WriteCanonicalHash 

func WriteCanonicalHash(db ethdb.KeyValueWriter, hash common.Hash, number uint64)

WriteCanonicalHash stores the hash assigned to a canonical block number.

func WriteChainConfig 

func WriteChainConfig(db ethdb.KeyValueWriter, hash common.Hash, cfg *params.ChainConfig)

WriteChainConfig writes the chain config settings to the database.

func WriteCode 

func WriteCode(db ethdb.KeyValueWriter, hash common.Hash, code []byte)

WriteCode writes the provided contract code database.

func WriteDatabaseVersion 

func WriteDatabaseVersion(db ethdb.KeyValueWriter, version uint64)

WriteDatabaseVersion stores the version number of the database

func WriteFastTxLookupLimit 

func WriteFastTxLookupLimit(db ethdb.KeyValueWriter, number uint64)

WriteFastTxLookupLimit stores the txlookup limit used in fast sync into database.

func WriteFinalizedBlockHash 

func WriteFinalizedBlockHash(db ethdb.KeyValueWriter, hash common.Hash)

WriteFinalizedBlockHash stores the hash of the finalized block.

func WriteGenesisStateSpec 

func WriteGenesisStateSpec(db ethdb.KeyValueWriter, blockhash common.Hash, data []byte)

WriteGenesisStateSpec writes the genesis state specification into the disk.

func WriteHeadBlockHash 

func WriteHeadBlockHash(db ethdb.KeyValueWriter, hash common.Hash)

WriteHeadBlockHash stores the head block's hash.

func WriteHeadFastBlockHash 

func WriteHeadFastBlockHash(db ethdb.KeyValueWriter, hash common.Hash)

WriteHeadFastBlockHash stores the hash of the current fast-sync head block.

func WriteHeadHeaderHash 

func WriteHeadHeaderHash(db ethdb.KeyValueWriter, hash common.Hash)

WriteHeadHeaderHash stores the hash of the current canonical head header.

func WriteHeader 

func WriteHeader(db ethdb.KeyValueWriter, header *types.Header)

WriteHeader stores a block header into the database and also stores the hash- to-number mapping.

func WriteHeaderNumber 

func WriteHeaderNumber(db ethdb.KeyValueWriter, hash common.Hash, number uint64)

WriteHeaderNumber stores the hash->number mapping.

func WriteLastPivotNumber 

func WriteLastPivotNumber(db ethdb.KeyValueWriter, pivot uint64)

WriteLastPivotNumber stores the number of the last pivot block.

func WriteLegacyTrieNode 

func WriteLegacyTrieNode(db ethdb.KeyValueWriter, hash common.Hash, node []byte)

WriteLegacyTrieNode writes the provided legacy trie node to database.

func WritePersistentStateID 

func WritePersistentStateID(db ethdb.KeyValueWriter, number uint64)

WritePersistentStateID stores the id of the persistent state into database.

func WritePreimages 

func WritePreimages(db ethdb.KeyValueWriter, preimages map[common.Hash][]byte)

WritePreimages writes the provided set of preimages to the database.

func WriteReceipts 

func WriteReceipts(db ethdb.KeyValueWriter, hash common.Hash, number uint64, receipts types.Receipts)

WriteReceipts stores all the transaction receipts belonging to a block.

func WriteSkeletonHeader 

func WriteSkeletonHeader(db ethdb.KeyValueWriter, header *types.Header)

WriteSkeletonHeader stores a block header into the skeleton sync store.

func WriteSkeletonSyncStatus 

func WriteSkeletonSyncStatus(db ethdb.KeyValueWriter, status []byte)

WriteSkeletonSyncStatus stores the serialized sync status to save at shutdown.

func WriteSnapSyncStatusFlag 

func WriteSnapSyncStatusFlag(db ethdb.KeyValueWriter, flag uint8)

WriteSnapSyncStatusFlag stores the state snap sync status flag into database.

func WriteSnapshotDisabled 

func WriteSnapshotDisabled(db ethdb.KeyValueWriter)

WriteSnapshotDisabled stores the snapshot pause flag.

func WriteSnapshotGenerator 

func WriteSnapshotGenerator(db ethdb.KeyValueWriter, generator []byte)

WriteSnapshotGenerator stores the serialized snapshot generator to save at shutdown.

func WriteSnapshotJournal 

func WriteSnapshotJournal(db ethdb.KeyValueWriter, journal []byte)

WriteSnapshotJournal stores the serialized in-memory diff layers to save at shutdown. The blob is expected to be max a few 10s of megabytes.

func WriteSnapshotRecoveryNumber 

func WriteSnapshotRecoveryNumber(db ethdb.KeyValueWriter, number uint64)

WriteSnapshotRecoveryNumber stores the block number of the last persisted snapshot layer.

func WriteSnapshotRoot 

func WriteSnapshotRoot(db ethdb.KeyValueWriter, root common.Hash)

WriteSnapshotRoot stores the root of the block whose state is contained in the persisted snapshot.

func WriteSnapshotSyncStatus 

func WriteSnapshotSyncStatus(db ethdb.KeyValueWriter, status []byte)

WriteSnapshotSyncStatus stores the serialized sync status to save at shutdown.

func WriteStateHistory 

func WriteStateHistory(db ethdb.AncientWriter, id uint64, meta []byte, accountIndex []byte, storageIndex []byte, accounts []byte, storages []byte)

WriteStateHistory writes the provided state history to database. Compute the position of state history in freezer by minus one since the id of first state history starts from one(zero for initial state).

func WriteStateID 

func WriteStateID(db ethdb.KeyValueWriter, root common.Hash, id uint64)

WriteStateID writes the provided state lookup to database.

func WriteStorageSnapshot 

func WriteStorageSnapshot(db ethdb.KeyValueWriter, accountHash, storageHash common.Hash, entry []byte)

WriteStorageSnapshot stores the snapshot entry of an storage trie leaf.

func WriteStorageTrieNode 

func WriteStorageTrieNode(db ethdb.KeyValueWriter, accountHash common.Hash, path []byte, node []byte)

WriteStorageTrieNode writes the provided storage trie node into database.

func WriteTd 

func WriteTd(db ethdb.KeyValueWriter, hash common.Hash, number uint64, td *big.Int)

WriteTd stores the total difficulty of a block into the database.

func WriteTransitionStatus 

func WriteTransitionStatus(db ethdb.KeyValueWriter, data []byte)

WriteTransitionStatus stores the eth2 transition status to the database

func WriteTrieJournal 

func WriteTrieJournal(db ethdb.KeyValueWriter, journal []byte)

WriteTrieJournal stores the serialized in-memory trie nodes of layers to save at shutdown.

func WriteTrieNode 

func WriteTrieNode(db ethdb.KeyValueWriter, owner common.Hash, path []byte, hash common.Hash, node []byte, scheme string)

WriteTrieNode writes the trie node into database with the provided node info and associated node hash. hashScheme-based lookup requires the following:

  • hash

pathScheme-based lookup requires the following:

  • owner
  • path

func WriteTxIndexTail 

func WriteTxIndexTail(db ethdb.KeyValueWriter, number uint64)

WriteTxIndexTail stores the number of oldest indexed block into database.

func WriteTxLookupEntries 

func WriteTxLookupEntries(db ethdb.KeyValueWriter, number uint64, hashes []common.Hash)

WriteTxLookupEntries is identical to WriteTxLookupEntry, but it works on a list of hashes

func WriteTxLookupEntriesByBlock 

func WriteTxLookupEntriesByBlock(db ethdb.KeyValueWriter, block *types.Block)

WriteTxLookupEntriesByBlock stores a positional metadata for every transaction from a block, enabling hash based transaction and receipt lookups.

Types

type Freezer 

type Freezer struct {
	// contains filtered or unexported fields
}

Freezer is a memory mapped append-only database to store immutable ordered data into flat files:

  • The append-only nature ensures that disk writes are minimized.
  • The memory mapping ensures we can max out system memory for caching without reserving it for go-ethereum. This would also reduce the memory requirements of Geth, and thus also GC overhead.

func NewChainFreezer 

func NewChainFreezer(datadir string, namespace string, readonly bool) (*Freezer, error)

NewChainFreezer is a small utility method around NewFreezer that sets the default parameters for the chain storage.

func NewFreezer 

func NewFreezer(datadir string, namespace string, readonly bool, maxTableSize uint32, tables map[string]bool) (*Freezer, error)

NewFreezer creates a freezer instance for maintaining immutable ordered data according to the given parameters.

The 'tables' argument defines the data tables. If the value of a map entry is true, snappy compression is disabled for the table.

func (*Freezer) Ancient 

func (f *Freezer) Ancient(kind string, number uint64) ([]byte, error)

Ancient retrieves an ancient binary blob from the append-only immutable files.

func (*Freezer) AncientRange 

func (f *Freezer) AncientRange(kind string, start, count, maxBytes uint64) ([][]byte, error)

AncientRange retrieves multiple items in sequence, starting from the index 'start'. It will return

  • at most 'count' items,
  • if maxBytes is specified: at least 1 item (even if exceeding the maxByteSize), but will otherwise return as many items as fit into maxByteSize.
  • if maxBytes is not specified, 'count' items will be returned if they are present.

func (*Freezer) AncientSize 

func (f *Freezer) AncientSize(kind string) (uint64, error)

AncientSize returns the ancient size of the specified category.

func (*Freezer) Ancients 

func (f *Freezer) Ancients() (uint64, error)

Ancients returns the length of the frozen items.

func (*Freezer) Close 

func (f *Freezer) Close() error

Close terminates the chain freezer, unmapping all the data files.

func (*Freezer) HasAncient 

func (f *Freezer) HasAncient(kind string, number uint64) (bool, error)

HasAncient returns an indicator whether the specified ancient data exists in the freezer.

func (*Freezer) MigrateTable 

func (f *Freezer) MigrateTable(kind string, convert convertLegacyFn) error

MigrateTable processes the entries in a given table in sequence converting them to a new format if they're of an old format.

func (*Freezer) ModifyAncients 

func (f *Freezer) ModifyAncients(fn func(ethdb.AncientWriteOp) error) (writeSize int64, err error)

ModifyAncients runs the given write operation.

func (*Freezer) ReadAncients 

func (f *Freezer) ReadAncients(fn func(ethdb.AncientReaderOp) error) (err error)

ReadAncients runs the given read operation while ensuring that no writes take place on the underlying freezer.

func (*Freezer) Sync 

func (f *Freezer) Sync() error

Sync flushes all data tables to disk.

func (*Freezer) Tail 

func (f *Freezer) Tail() (uint64, error)

Tail returns the number of first stored item in the freezer.

func (*Freezer) TruncateHead 

func (f *Freezer) TruncateHead(items uint64) (uint64, error)

TruncateHead discards any recent data above the provided threshold number. It returns the previous head number.

func (*Freezer) TruncateTail 

func (f *Freezer) TruncateTail(tail uint64) (uint64, error)

TruncateTail discards any recent data below the provided threshold number.

type KeyLengthIterator 

type KeyLengthIterator struct {
	ethdb.Iterator
	// contains filtered or unexported fields
}

KeyLengthIterator is a wrapper for a database iterator that ensures only key-value pairs with a specific key length will be returned.

func (*KeyLengthIterator) Next 

func (it *KeyLengthIterator) Next() bool

type LegacyTxLookupEntry 

type LegacyTxLookupEntry struct {
	BlockHash  common.Hash
	BlockIndex uint64
	Index      uint64
}

LegacyTxLookupEntry is the legacy TxLookupEntry definition with some unnecessary fields.

type NumberHash 

type NumberHash struct {
	Number uint64
	Hash   common.Hash
}

func ReadAllHashesInRange 

func ReadAllHashesInRange(db ethdb.Iteratee, first, last uint64) []*NumberHash

ReadAllHashesInRange retrieves all the hashes assigned to blocks at certain heights, both canonical and reorged forks included. This method considers both limits to be _inclusive_.

type OpenOptions 

type OpenOptions struct {
	Type              string // "leveldb" | "pebble"
	Directory         string // the datadir
	AncientsDirectory string // the ancients-dir
	Namespace         string // the namespace for database relevant metrics
	Cache             int    // the capacity(in megabytes) of the data caching
	Handles           int    // number of files to be open simultaneously
	ReadOnly          bool
	// Ephemeral means that filesystem sync operations should be avoided: data integrity in the face of
	// a crash is not important. This option should typically be used in tests.
	Ephemeral bool
}

OpenOptions contains the options to apply when opening a database. OBS: If AncientsDirectory is empty, it indicates that no freezer is to be used.

type ResettableFreezer 

type ResettableFreezer struct {
	// contains filtered or unexported fields
}

ResettableFreezer is a wrapper of the freezer which makes the freezer resettable.

func NewResettableFreezer 

func NewResettableFreezer(datadir string, namespace string, readonly bool, maxTableSize uint32, tables map[string]bool) (*ResettableFreezer, error)

NewResettableFreezer creates a resettable freezer, note freezer is only resettable if the passed file directory is exclusively occupied by the freezer. And also the user-configurable ancient root directory is **not** supported for reset since it might be a mount and rename will cause a copy of hundreds of gigabyte into local directory. It needs some other file based solutions.

The reset function will delete directory atomically and re-create the freezer from scratch.

func NewStateFreezer 

func NewStateFreezer(ancientDir string, readOnly bool) (*ResettableFreezer, error)

NewStateFreezer initializes the freezer for state history.

func (*ResettableFreezer) Ancient 

func (f *ResettableFreezer) Ancient(kind string, number uint64) ([]byte, error)

Ancient retrieves an ancient binary blob from the append-only immutable files.

func (*ResettableFreezer) AncientRange 

func (f *ResettableFreezer) AncientRange(kind string, start, count, maxBytes uint64) ([][]byte, error)

AncientRange retrieves multiple items in sequence, starting from the index 'start'. It will return

  • at most 'count' items,
  • if maxBytes is specified: at least 1 item (even if exceeding the maxByteSize), but will otherwise return as many items as fit into maxByteSize.
  • if maxBytes is not specified, 'count' items will be returned if they are present.

func (*ResettableFreezer) AncientSize 

func (f *ResettableFreezer) AncientSize(kind string) (uint64, error)

AncientSize returns the ancient size of the specified category.

func (*ResettableFreezer) Ancients 

func (f *ResettableFreezer) Ancients() (uint64, error)

Ancients returns the length of the frozen items.

func (*ResettableFreezer) Close 

func (f *ResettableFreezer) Close() error

Close terminates the chain freezer, unmapping all the data files.

func (*ResettableFreezer) HasAncient 

func (f *ResettableFreezer) HasAncient(kind string, number uint64) (bool, error)

HasAncient returns an indicator whether the specified ancient data exists in the freezer

func (*ResettableFreezer) MigrateTable 

func (f *ResettableFreezer) MigrateTable(kind string, convert convertLegacyFn) error

MigrateTable processes the entries in a given table in sequence converting them to a new format if they're of an old format.

func (*ResettableFreezer) ModifyAncients 

func (f *ResettableFreezer) ModifyAncients(fn func(ethdb.AncientWriteOp) error) (writeSize int64, err error)

ModifyAncients runs the given write operation.

func (*ResettableFreezer) ReadAncients 

func (f *ResettableFreezer) ReadAncients(fn func(ethdb.AncientReaderOp) error) (err error)

ReadAncients runs the given read operation while ensuring that no writes take place on the underlying freezer.

func (*ResettableFreezer) Reset 

func (f *ResettableFreezer) Reset() error

Reset deletes the file directory exclusively occupied by the freezer and recreate the freezer from scratch. The atomicity of directory deletion is guaranteed by the rename operation, the leftover directory will be cleaned up in next startup in case crash happens after rename.

func (*ResettableFreezer) Sync 

func (f *ResettableFreezer) Sync() error

Sync flushes all data tables to disk.

func (*ResettableFreezer) Tail 

func (f *ResettableFreezer) Tail() (uint64, error)

Tail returns the number of first stored item in the freezer.

func (*ResettableFreezer) TruncateHead 

func (f *ResettableFreezer) TruncateHead(items uint64) (uint64, error)

TruncateHead discards any recent data above the provided threshold number. It returns the previous head number.

func (*ResettableFreezer) TruncateTail 

func (f *ResettableFreezer) TruncateTail(tail uint64) (uint64, error)

TruncateTail discards any recent data below the provided threshold number. It returns the previous value

Source Files

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