iavl

Documentation

Index

• func LoadStore(db dbm.DB, id types.CommitID, cacheSize int, lazyLoading bool, ...) (types.CommitKVStore, error)
• func LoadStoreWithInitialVersion(db dbm.DB, id types.CommitID, cacheSize int, lazyLoading bool, ...) (types.CommitKVStore, error)
• type Store
  • func UnsafeNewStore(tree *iavl.MutableTree) *Store
  • func (st *Store) CacheWrap() types.CacheWrap
  • func (st *Store) CacheWrapWithTrace(w io.Writer, tc types.TraceContext) types.CacheWrap
  • func (st *Store) Commit() types.CommitID
  • func (st *Store) Delete(key []byte)
  • func (st *Store) DeleteVersions(versions ...int64) error
  • func (st *Store) Get(key []byte) []byte
  • func (st *Store) GetImmutable(version int64) (*Store, error)
  • func (st *Store) GetStoreType() types.StoreType
  • func (st *Store) Has(key []byte) (exists bool)
  • func (st *Store) Iterator(start, end []byte) types.Iterator
  • func (st *Store) LastCommitID() types.CommitID
  • func (st *Store) Query(req abci.RequestQuery) (res abci.ResponseQuery)
  • func (st *Store) ReverseIterator(start, end []byte) types.Iterator
  • func (st *Store) Set(key, value []byte)
  • func (st *Store) SetPruning(_ types.PruningOptions)
  • func (st *Store) VersionExists(version int64) bool
• type Tree

Functions

func LoadStore

func LoadStore(db dbm.DB, id types.CommitID, cacheSize int, lazyLoading bool, metric *iavl.Metrics) (types.CommitKVStore, error)

LoadStore returns an IAVL Store as a CommitKVStore. Internally, it will load the store's version (id) from the provided DB. An error is returned if the version fails to load.

func LoadStoreWithInitialVersion

func LoadStoreWithInitialVersion(db dbm.DB, id types.CommitID, cacheSize int, lazyLoading bool, initialVersion uint64,
	metric *iavl.Metrics) (types.CommitKVStore, error)

LoadStore returns an IAVL Store as a CommitKVStore setting its initialVersion to the one given. Internally, it will load the store's version (id) from the provided DB. An error is returned if the version fails to load.

Types

type Store

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

Store Implements types.KVStore and CommitKVStore.

func UnsafeNewStore

func UnsafeNewStore(tree *iavl.MutableTree) *Store

UnsafeNewStore returns a reference to a new IAVL Store with a given mutable IAVL tree reference. It should only be used for testing purposes.

CONTRACT: The IAVL tree should be fully loaded. CONTRACT: PruningOptions passed in as argument must be the same as pruning options passed into iavl.MutableTree

func (*Store) CacheWrap

func (st *Store) CacheWrap() types.CacheWrap

Implements Store.

func (*Store) CacheWrapWithTrace

func (st *Store) CacheWrapWithTrace(w io.Writer, tc types.TraceContext) types.CacheWrap

CacheWrapWithTrace implements the Store interface.

func (*Store) Commit

func (st *Store) Commit() types.CommitID

Commit commits the current store state and returns a CommitID with the new version and hash.

func (*Store) Delete

func (st *Store) Delete(key []byte)

Implements types.KVStore.

func (*Store) DeleteVersions

func (st *Store) DeleteVersions(versions ...int64) error

DeleteVersions deletes a series of versions from the MutableTree. An error is returned if any single version is invalid or the delete fails. All writes happen in a single batch with a single commit.

func (*Store) Get

func (st *Store) Get(key []byte) []byte

Implements types.KVStore.

func (*Store) GetImmutable

func (st *Store) GetImmutable(version int64) (*Store, error)

GetImmutable returns a reference to a new store backed by an immutable IAVL tree at a specific version (height) without any pruning options. This should be used for querying and iteration only. If the version does not exist or has been pruned, an empty immutable IAVL tree will be used. Any mutable operations executed will result in a panic.

func (*Store) GetStoreType

func (st *Store) GetStoreType() types.StoreType

Implements Store.

func (*Store) Has

func (st *Store) Has(key []byte) (exists bool)

Implements types.KVStore.

func (*Store) Iterator

func (st *Store) Iterator(start, end []byte) types.Iterator

Implements types.KVStore.

func (*Store) LastCommitID

func (st *Store) LastCommitID() types.CommitID

Implements Committer.

func (*Store) Query

func (st *Store) Query(req abci.RequestQuery) (res abci.ResponseQuery)

Query implements ABCI interface, allows queries

by default we will return from (latest height -1), as we will have merkle proofs immediately (header height = data height + 1) If latest-1 is not present, use latest (which must be present) if you care to have the latest data to see a tx results, you must explicitly set the height you want to see

func (*Store) ReverseIterator

func (st *Store) ReverseIterator(start, end []byte) types.Iterator

Implements types.KVStore.

func (*Store) Set

func (st *Store) Set(key, value []byte)

Implements types.KVStore.

func (*Store) SetPruning

func (st *Store) SetPruning(_ types.PruningOptions)

SetPruning panics as pruning options should be provided at initialization since IAVl accepts pruning options directly.

func (*Store) VersionExists

func (st *Store) VersionExists(version int64) bool

VersionExists returns whether or not a given version is stored.

type Tree

type Tree interface {
	Has(key []byte) bool
	Get(key []byte) (index int64, value []byte)
	Set(key, value []byte) bool
	Remove(key []byte) ([]byte, bool)
	SaveVersion() ([]byte, int64, error)
	DeleteVersion(version int64) error
	DeleteVersions(versions ...int64) error
	Version() int64
	Hash() []byte
	VersionExists(version int64) bool
	GetVersioned(key []byte, version int64) (int64, []byte)
	GetVersionedWithProof(key []byte, version int64) ([]byte, *iavl.RangeProof, error)
	GetImmutable(version int64) (*iavl.ImmutableTree, error)
}

Tree defines an interface that both mutable and immutable IAVL trees must implement. For mutable IAVL trees, the interface is directly implemented by an iavl.MutableTree. For an immutable IAVL tree, a wrapper must be made.