enum IDBTransactionMode {
    "readonly",
    "readwrite",
    "versionchange"
};

enum IDBRequestReadyState {
    "pending",
    "done"
};

interface IDBKeyRange {
    readonly    attribute any     lower;
    readonly    attribute any     upper;
    readonly    attribute boolean lowerOpen;
    readonly    attribute boolean upperOpen;
    static IDBKeyRange only (any value);
    static IDBKeyRange lowerBound (any lower, optional boolean open = false);
    static IDBKeyRange upperBound (any upper, optional boolean open = false);
    static IDBKeyRange bound (any lower, any upper, optional boolean lowerOpen = false, optional boolean upperOpen = false);
};

enum IDBCursorDirection {
    "next",
    "nextunique",
    "prev",
    "prevunique"
};

dictionary IDBObjectStoreParameters {
    (DOMString or sequence<DOMString>)? keyPath = null;
    boolean                             autoIncrement = false;
};

dictionary IDBIndexParameters {
    boolean unique = false;
    boolean multiEntry = false;
};

dictionary IDBVersionChangeEventInit : EventInit {
    unsigned long long  oldVersion = 0;
    unsigned long long? newVersion = null;
};

interface IDBRequest : EventTarget {
    readonly    attribute any                                        result;
    readonly    attribute DOMError                                   error;
    readonly    attribute (IDBObjectStore or IDBIndex or IDBCursor)? source;
    readonly    attribute IDBTransaction                             transaction;
    readonly    attribute IDBRequestReadyState                       readyState;
                attribute EventHandler                               onsuccess;
                attribute EventHandler                               onerror;
};

interface IDBOpenDBRequest : IDBRequest {
                attribute EventHandler onblocked;
                attribute EventHandler onupgradeneeded;
};

[Constructor(DOMString type, optional IDBVersionChangeEventInit eventInitDict)]
interface IDBVersionChangeEvent : Event {
    readonly    attribute unsigned long long  oldVersion;
    readonly    attribute unsigned long long? newVersion;
};

[NoInterfaceObject]
interface IDBEnvironment {
    readonly    attribute IDBFactory indexedDB;
};

interface IDBFactory {
    IDBOpenDBRequest open (DOMString name, [EnforceRange] optional unsigned long long version);
    IDBOpenDBRequest deleteDatabase (DOMString name);
    short            cmp (any first, any second);
};

interface IDBDatabase : EventTarget {
    readonly    attribute DOMString          name;
    readonly    attribute unsigned long long version;
    readonly    attribute DOMStringList      objectStoreNames;
    IDBObjectStore createObjectStore (DOMString name, optional IDBObjectStoreParameters optionalParameters);
    void           deleteObjectStore (DOMString name);
    IDBTransaction transaction ((DOMString or sequence<DOMString>) storeNames, optional IDBTransactionMode mode = "readonly");
    void           close ();
                attribute EventHandler       onabort;
                attribute EventHandler       onerror;
                attribute EventHandler       onversionchange;
};

interface IDBObjectStore {
    readonly    attribute DOMString      name;
    readonly    attribute any            keyPath;
    readonly    attribute DOMStringList  indexNames;
    readonly    attribute IDBTransaction transaction;
    readonly    attribute boolean        autoIncrement;
    IDBRequest put (any value, optional any key);
    IDBRequest add (any value, optional any key);
    IDBRequest delete (any key);
    IDBRequest get (any key);
    IDBRequest clear ();
    IDBRequest openCursor (optional any range, optional IDBCursorDirection direction = "next");
    IDBIndex   createIndex (DOMString name, (DOMString or sequence<DOMString>) keyPath, optional IDBIndexParameters optionalParameters);
    IDBIndex   index (DOMString name);
    void       deleteIndex (DOMString indexName);
    IDBRequest count (optional any key);
};

interface IDBIndex {
    readonly    attribute DOMString      name;
    readonly    attribute IDBObjectStore objectStore;
    readonly    attribute any            keyPath;
    readonly    attribute boolean        multiEntry;
    readonly    attribute boolean        unique;
    IDBRequest openCursor (optional any range, optional IDBCursorDirection direction = "next");
    IDBRequest openKeyCursor (optional any range, optional IDBCursorDirection direction = "next");
    IDBRequest get (any key);
    IDBRequest getKey (any key);
    IDBRequest count (optional any key);
};

interface IDBCursor {
    readonly    attribute (IDBObjectStore or IDBIndex) source;
    readonly    attribute IDBCursorDirection           direction;
    readonly    attribute any                          key;
    readonly    attribute any                          primaryKey;
    IDBRequest update (any value);
    void       advance ([EnforceRange] unsigned long count);
    void       continue (optional any key);
    IDBRequest delete ();
};

interface IDBCursorWithValue : IDBCursor {
    readonly    attribute any value;
};

interface IDBTransaction : EventTarget {
    readonly    attribute IDBTransactionMode mode;
    readonly    attribute IDBDatabase        db;
    readonly    attribute DOMError           error;
    IDBObjectStore objectStore (DOMString name);
    void           abort ();
                attribute EventHandler       onabort;
                attribute EventHandler       oncomplete;
                attribute EventHandler       onerror;
};