store

package
v0.1.0-alpha Latest Latest
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 Go to latest Published: Sep 19, 2022 License: Apache-2.0 Imports: 12 Imported by: 33

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Index

Constants

This section is empty.

Variables

View Source 
var (
	// ErrKeyNotFound is returned if key is not found in KVStore.
	ErrKeyNotFound = errors.New("key not found")
)

Functions

This section is empty.

Types

type BadgerBatch 

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

BadgerBatch encapsulates badger transaction

func (*BadgerBatch) Commit 

func (bb *BadgerBatch) Commit() error

Commit commits a transaction

func (*BadgerBatch) Delete 

func (bb *BadgerBatch) Delete(key []byte) error

Delete removes the key and associated value from store

func (*BadgerBatch) Discard 

func (bb *BadgerBatch) Discard()

Discard cancels a transaction

func (*BadgerBatch) Set 

func (bb *BadgerBatch) Set(key, value []byte) error

Set accumulates key-value entries in a transaction

type BadgerIterator 

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

BadgerIterator encapsulates prefix iterator for badger kv store.

func (*BadgerIterator) Discard 

func (i *BadgerIterator) Discard()

Discard has to be called to free iterator resources.

func (*BadgerIterator) Error 

func (i *BadgerIterator) Error() error

Error returns last error that occurred during iteration.

func (*BadgerIterator) Key 

func (i *BadgerIterator) Key() []byte

Key returns key pointed by iterator.

func (*BadgerIterator) Next 

func (i *BadgerIterator) Next()

Next progresses iterator to the next key-value pair.

func (*BadgerIterator) Valid 

func (i *BadgerIterator) Valid() bool

Valid returns true if iterator is inside its prefix, false otherwise.

func (*BadgerIterator) Value 

func (i *BadgerIterator) Value() []byte

Value returns value pointer by iterator.

type BadgerKV 

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

BadgerKV is a implementation of KVStore using Badger v3.

func (*BadgerKV) Delete 

func (b *BadgerKV) Delete(key []byte) error

Delete removes key and corresponding value from store.

func (*BadgerKV) Get 

func (b *BadgerKV) Get(key []byte) ([]byte, error)

Get returns value for given key, or error.

func (*BadgerKV) NewBatch 

func (b *BadgerKV) NewBatch() Batch

NewBatch creates new batch. Note: badger batches should be short lived as they use extra resources.

func (*BadgerKV) PrefixIterator 

func (b *BadgerKV) PrefixIterator(prefix []byte) Iterator

PrefixIterator returns instance of prefix Iterator for BadgerKV.

func (*BadgerKV) Set 

func (b *BadgerKV) Set(key []byte, value []byte) error

Set saves key-value mapping in store.

type Batch 

type Batch interface {
	Set(key, value []byte) error // Accumulates KV entries in a transaction.
	Delete(key []byte) error     // Deletes the given key.
	Commit() error               // Commits the transaction.
	Discard()                    // Discards the transaction.
}

Batch enables batching of transactions.

type DefaultStore 

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

DefaultStore is a default store implmementation.

func (*DefaultStore) Height 

func (s *DefaultStore) Height() uint64

Height returns height of the highest block saved in the Store.

func (*DefaultStore) LoadBlock 

func (s *DefaultStore) LoadBlock(height uint64) (*types.Block, error)

LoadBlock returns block at given height, or error if it's not found in Store. TODO(tzdybal): what is more common access pattern? by height or by hash? currently, we're indexing height->hash, and store blocks by hash, but we might as well store by height and index hash->height

func (*DefaultStore) LoadBlockByHash 

func (s *DefaultStore) LoadBlockByHash(hash [32]byte) (*types.Block, error)

LoadBlockByHash returns block with given block header hash, or error if it's not found in Store.

func (*DefaultStore) LoadBlockResponses 

func (s *DefaultStore) LoadBlockResponses(height uint64) (*tmstate.ABCIResponses, error)

LoadBlockResponses returns block results at given height, or error if it's not found in Store.

func (*DefaultStore) LoadCommit 

func (s *DefaultStore) LoadCommit(height uint64) (*types.Commit, error)

LoadCommit returns commit for a block at given height, or error if it's not found in Store.

func (*DefaultStore) LoadCommitByHash 

func (s *DefaultStore) LoadCommitByHash(hash [32]byte) (*types.Commit, error)

LoadCommitByHash returns commit for a block with given block header hash, or error if it's not found in Store.

func (*DefaultStore) LoadState 

func (s *DefaultStore) LoadState() (types.State, error)

LoadState returns last state saved with UpdateState.

func (*DefaultStore) LoadValidators 

func (s *DefaultStore) LoadValidators(height uint64) (*tmtypes.ValidatorSet, error)

LoadValidators loads validator set at given block height from store.

func (*DefaultStore) SaveBlock 

func (s *DefaultStore) SaveBlock(block *types.Block, commit *types.Commit) error

SaveBlock adds block to the store along with corresponding commit. Stored height is updated if block height is greater than stored value.

func (*DefaultStore) SaveBlockResponses 

func (s *DefaultStore) SaveBlockResponses(height uint64, responses *tmstate.ABCIResponses) error

SaveBlockResponses saves block responses (events, tx responses, validator set updates, etc) in Store.

func (*DefaultStore) SaveValidators 

func (s *DefaultStore) SaveValidators(height uint64, validatorSet *tmtypes.ValidatorSet) error

SaveValidators stores validator set for given block height in store.

func (*DefaultStore) SetHeight 

func (s *DefaultStore) SetHeight(height uint64)

SetHeight sets the height saved in the Store if it is higher than the existing height

func (*DefaultStore) UpdateState 

func (s *DefaultStore) UpdateState(state types.State) error

UpdateState updates state saved in Store. Only one State is stored. If there is no State in Store, state will be saved.

type Iterator 

type Iterator interface {
	Valid() bool
	Next()
	Key() []byte
	Value() []byte
	Error() error
	Discard()
}

Iterator enables traversal over a given prefix.

type KVStore 

type KVStore interface {
	Get(key []byte) ([]byte, error)        // Get gets the value for a key.
	Set(key []byte, value []byte) error    // Set updates the value for a key.
	Delete(key []byte) error               // Delete deletes a key.
	NewBatch() Batch                       // NewBatch creates a new batch.
	PrefixIterator(prefix []byte) Iterator // PrefixIterator creates iterator to traverse given prefix.
}

KVStore encapsulates key-value store abstraction, in minimalistic interface.

KVStore MUST be thread safe.

func NewDefaultInMemoryKVStore 

func NewDefaultInMemoryKVStore() KVStore

NewDefaultInMemoryKVStore builds KVStore that works in-memory (without accessing disk).

func NewDefaultKVStore 

func NewDefaultKVStore(rootDir, dbPath, dbName string) KVStore

NewDefaultKVStore creates instance of default key-value store.

type PrefixKV 

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

PrefixKV is a key-value store that prepends all keys with given prefix.

func NewPrefixKV 

func NewPrefixKV(kv KVStore, prefix []byte) *PrefixKV

NewPrefixKV creates new PrefixKV on top of other KVStore.

func (*PrefixKV) Delete 

func (p *PrefixKV) Delete(key []byte) error

Delete deletes key-value pair for given key.

func (*PrefixKV) Get 

func (p *PrefixKV) Get(key []byte) ([]byte, error)

Get returns value for given key.

func (*PrefixKV) NewBatch 

func (p *PrefixKV) NewBatch() Batch

NewBatch creates a new batch.

func (*PrefixKV) PrefixIterator 

func (p *PrefixKV) PrefixIterator(prefix []byte) Iterator

PrefixIterator creates iterator to traverse given prefix.

func (*PrefixKV) Set 

func (p *PrefixKV) Set(key []byte, value []byte) error

Set updates the value for given key.

type PrefixKVBatch 

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

PrefixKVBatch enables batching of operations on PrefixKV.

func (*PrefixKVBatch) Commit 

func (pb *PrefixKVBatch) Commit() error

Commit applies all operations in the batch atomically.

func (*PrefixKVBatch) Delete 

func (pb *PrefixKVBatch) Delete(key []byte) error

Delete adds delete operation to batch.

func (*PrefixKVBatch) Discard 

func (pb *PrefixKVBatch) Discard()

Discard discards all operations in the batch.

func (*PrefixKVBatch) Set 

func (pb *PrefixKVBatch) Set(key, value []byte) error

Set adds key-value pair to batch.

type Store 

type Store interface {
	// Height returns height of the highest block in store.
	Height() uint64

	// SetHeight sets the height saved in the Store if it is higher than the existing height.
	SetHeight(height uint64)

	// SaveBlock saves block along with its seen commit (which will be included in the next block).
	SaveBlock(block *types.Block, commit *types.Commit) error

	// LoadBlock returns block at given height, or error if it's not found in Store.
	LoadBlock(height uint64) (*types.Block, error)
	// LoadBlockByHash returns block with given block header hash, or error if it's not found in Store.
	LoadBlockByHash(hash [32]byte) (*types.Block, error)

	// SaveBlockResponses saves block responses (events, tx responses, validator set updates, etc) in Store.
	SaveBlockResponses(height uint64, responses *tmstate.ABCIResponses) error

	// LoadBlockResponses returns block results at given height, or error if it's not found in Store.
	LoadBlockResponses(height uint64) (*tmstate.ABCIResponses, error)

	// LoadCommit returns commit for a block at given height, or error if it's not found in Store.
	LoadCommit(height uint64) (*types.Commit, error)
	// LoadCommitByHash returns commit for a block with given block header hash, or error if it's not found in Store.
	LoadCommitByHash(hash [32]byte) (*types.Commit, error)

	// UpdateState updates state saved in Store. Only one State is stored.
	// If there is no State in Store, state will be saved.
	UpdateState(state types.State) error
	// LoadState returns last state saved with UpdateState.
	LoadState() (types.State, error)

	SaveValidators(height uint64, validatorSet *tmtypes.ValidatorSet) error

	LoadValidators(height uint64) (*tmtypes.ValidatorSet, error)
}

Store is minimal interface for storing and retrieving blocks, commits and state.

func New 

func New(kv KVStore) Store

New returns new, default store.

Source Files

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