iavl

Documentation

Index

• Constants
• func LoadStore(db dbm.DB, logger log.Logger, key types.StoreKey, id types.CommitID, ...) (types.CommitKVStore, error)
• func LoadStoreWithInitialVersion(db dbm.DB, logger log.Logger, key types.StoreKey, id types.CommitID, ...) (types.CommitKVStore, error)
• type Store
  • func UnsafeNewStore(tree *iavl.MutableTree) *Store
  • func (st *Store) CacheWrap() types.CacheWrap
  • func (st *Store) CacheWrapWithListeners(storeKey types.StoreKey, listeners []types.WriteListener) 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) Export(version int64) (*iavl.Exporter, error)
  • func (st *Store) Get(key []byte) []byte
  • func (st *Store) GetAllVersions() []int
  • func (st *Store) GetImmutable(version int64) (*Store, error)
  • func (st *Store) GetPruning() types.PruningOptions
  • func (st *Store) GetStoreType() types.StoreType
  • func (st *Store) Has(key []byte) (exists bool)
  • func (st *Store) Import(version int64) (*iavl.Importer, error)
  • func (st *Store) Iterator(start, end []byte) types.Iterator
  • func (st *Store) LastCommitID() types.CommitID
  • func (st *Store) LoadVersionForOverwriting(targetVersion int64) (int64, error)
  • 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) SetInitialVersion(version int64)
  • func (st *Store) SetPruning(_ types.PruningOptions)
  • func (st *Store) VersionExists(version int64) bool
• type Tree

Constants

const (
	// DefaultIAVLCacheSize is default Iavl cache units size. 1 unit is 128 byte
	// default 64MB
	DefaultIAVLCacheSize = 1024 * 512
)

Functions

func LoadStore

func LoadStore(db dbm.DB, logger log.Logger, key types.StoreKey, id types.CommitID, lazyLoading bool, cacheSize int, disableFastNode bool) (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, or if called with a positive version on an empty tree.

func LoadStoreWithInitialVersion

func LoadStoreWithInitialVersion(db dbm.DB, logger log.Logger, key types.StoreKey, id types.CommitID, lazyLoading bool, initialVersion uint64, cacheSize int, disableFastNode bool) (types.CommitKVStore, error)

LoadStoreWithInitialVersion 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, or if called with a positive version on an empty tree.

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) CacheWrapWithListeners

func (st *Store) CacheWrapWithListeners(storeKey types.StoreKey, listeners []types.WriteListener) types.CacheWrap

CacheWrapWithListeners implements the CacheWrapper interface.

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) Export

func (st *Store) Export(version int64) (*iavl.Exporter, error)

Exports the IAVL store at the given version, returning an iavl.Exporter for the tree.

func (*Store) Get

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

Implements types.KVStore.

func (*Store) GetAllVersions

func (st *Store) GetAllVersions() []int

GetAllVersions returns all versions in the iavl tree

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) GetPruning

func (st *Store) GetPruning() types.PruningOptions

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

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) Import

func (st *Store) Import(version int64) (*iavl.Importer, error)

Import imports an IAVL tree at the given version, returning an iavl.Importer for importing.

func (*Store) Iterator

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

Implements types.KVStore.

func (*Store) LastCommitID

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

LastCommitID implements Committer.

func (*Store) LoadVersionForOverwriting

func (st *Store) LoadVersionForOverwriting(targetVersion int64) (int64, error)

LoadVersionForOverwriting attempts to load a tree at a previously committed version, or the latest version below it. Any versions greater than targetVersion will be deleted.

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) SetInitialVersion

func (st *Store) SetInitialVersion(version int64)

SetInitialVersion sets the initial version of the IAVL tree. It is used when starting a new chain at an arbitrary height.

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, error)
	Get(key []byte) ([]byte, error)
	Set(key, value []byte) (bool, error)
	Remove(key []byte) ([]byte, bool, error)
	SaveVersion() ([]byte, int64, error)
	DeleteVersion(version int64) error
	DeleteVersions(versions ...int64) error
	Version() int64
	Hash() ([]byte, error)
	VersionExists(version int64) bool
	GetVersioned(key []byte, version int64) ([]byte, error)
	GetVersionedWithProof(key []byte, version int64) ([]byte, *iavl.RangeProof, error)
	GetImmutable(version int64) (*iavl.ImmutableTree, error)
	SetInitialVersion(version uint64)
	Iterator(start, end []byte, ascending bool) (types.Iterator, error)
	LoadVersionForOverwriting(targetVersion int64) (int64, 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.