diff --git a/.eslintrc.json b/.eslintrc.json
index d6212d8e..9c7fc59f 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -31,6 +31,7 @@
   },
   "globals": {
     "SyntheticInputEvent": false,
-    "SyntheticKeyboardEvent": false
+    "SyntheticKeyboardEvent": false,
+    "Generator": false
   }
 }
diff --git a/common/actions/wallet.js b/common/actions/wallet.js
index 656c0ba1..89770418 100644
--- a/common/actions/wallet.js
+++ b/common/actions/wallet.js
@@ -12,7 +12,11 @@ export type SaveWalletAction = {
     payload: BaseWallet
 };
 
-export type WalletAction = UnlockPrivateKeyAction | SaveWalletAction;
+export type InitWalletAction = {
+    type: 'WALLET_INIT'
+};
+
+export type WalletAction = UnlockPrivateKeyAction | SaveWalletAction | InitWalletAction;
 
 export function unlockPrivateKey(value: PrivateKeyUnlockParams): UnlockPrivateKeyAction {
     return {
@@ -27,3 +31,9 @@ export function saveWallet(value: BaseWallet): SaveWalletAction {
         payload: value
     };
 }
+
+export function initWallet(): InitWalletAction {
+    return {
+        type: 'WALLET_INIT'
+    };
+}
diff --git a/common/containers/Tabs/SendTransaction/index.jsx b/common/containers/Tabs/SendTransaction/index.jsx
index 894b8a2a..f3ecb116 100644
--- a/common/containers/Tabs/SendTransaction/index.jsx
+++ b/common/containers/Tabs/SendTransaction/index.jsx
@@ -270,7 +270,7 @@ export class SendTransaction extends React.Component {
 
 function mapStateToProps(state: AppState) {
     return {
-        wallet: state.wallet
+        wallet: state.wallet.inst
     };
 }
 
diff --git a/common/reducers/wallet.js b/common/reducers/wallet.js
index 44bc87ab..d60849d1 100644
--- a/common/reducers/wallet.js
+++ b/common/reducers/wallet.js
@@ -1,19 +1,35 @@
 // @flow
-import type { WalletAction, SaveWalletAction } from 'actions/wallet';
+import type { WalletAction, SaveWalletAction, InitWalletAction } from 'actions/wallet';
 import BaseWallet from 'libs/wallet/base';
 
-export type State = ?BaseWallet;
+export type State = {
+    inst: ?BaseWallet,
+    balance: number,
+    tokens: {
+        [string]: number
+    }
+};
 
-const initialState: State = null;
+const initialState: State = {
+    inst: null,
+    balance: 0,
+    tokens: {}
+};
 
 function saveWallet(state: State, action: SaveWalletAction): State {
-    return action.payload;
+    return { ...state, inst: action.payload };
+}
+
+function initWallet(state: State): State {
+    return { ...state, balance: 0, tokens: {} };
 }
 
 export function wallet(state: State = initialState, action: WalletAction): State {
     switch (action.type) {
         case 'WALLET_SAVE':
             return saveWallet(state, action);
+        case 'WALLET_INIT':
+            return initWallet(state);
         default:
             return state;
     }
diff --git a/common/sagas/ens.js b/common/sagas/ens.js
index 6c9fd571..347f3c9f 100644
--- a/common/sagas/ens.js
+++ b/common/sagas/ens.js
@@ -1,11 +1,13 @@
 // @flow
 import { takeEvery, call, put, select } from 'redux-saga/effects';
 import { delay } from 'redux-saga';
+import type { Effect } from 'redux-saga/effects';
 import { cacheEnsAddress } from 'actions/ens';
 import type { ResolveEnsNameAction } from 'actions/ens';
 import { getEnsAddress } from 'selectors/ens';
 
-function* resolveEns(action: ResolveEnsNameAction) {
+function* resolveEns(action?: ResolveEnsNameAction) {
+    if (!action) return;
     const ensName = action.payload;
     // FIXME Add resolve logic
     ////                     _ens.getAddress(scope.addressDrtv.ensAddressField, function(data) {
@@ -28,6 +30,6 @@ function* resolveEns(action: ResolveEnsNameAction) {
     yield put(cacheEnsAddress(ensName, '0x7cB57B5A97eAbe94205C07890BE4c1aD31E486A8'));
 }
 
-export default function* notificationsSaga() {
+export default function* notificationsSaga(): Generator<Effect, void, any> {
     yield takeEvery('ENS_RESOLVE', resolveEns);
 }
diff --git a/common/sagas/notifications.js b/common/sagas/notifications.js
index b83a82d7..02e89e4f 100644
--- a/common/sagas/notifications.js
+++ b/common/sagas/notifications.js
@@ -1,10 +1,12 @@
 // @flow
 import { takeEvery, put, call } from 'redux-saga/effects';
 import { delay } from 'redux-saga';
+import type { Effect } from 'redux-saga/effects';
 import { closeNotification } from 'actions/notifications';
 import type { ShowNotificationAction } from 'actions/notifications';
 
-function* handleNotification(action: ShowNotificationAction) {
+function* handleNotification(action?: ShowNotificationAction) {
+    if (!action) return;
     const { duration } = action.payload;
     // show forever
     if (duration === 0) {
@@ -16,6 +18,6 @@ function* handleNotification(action: ShowNotificationAction) {
     yield put(closeNotification(action.payload));
 }
 
-export default function* notificationsSaga() {
+export default function* notificationsSaga(): Generator<Effect, void, any> {
     yield takeEvery('SHOW_NOTIFICATION', handleNotification);
 }
diff --git a/common/sagas/wallet.js b/common/sagas/wallet.js
index cda36ef7..0a356630 100644
--- a/common/sagas/wallet.js
+++ b/common/sagas/wallet.js
@@ -1,14 +1,26 @@
 // @flow
 import { takeEvery, call, put, select } from 'redux-saga/effects';
+import type { Effect } from 'redux-saga/effects';
 import { delay } from 'redux-saga';
-import { saveWallet } from 'actions/wallet';
+import { saveWallet, initWallet } from 'actions/wallet';
 import type { UnlockPrivateKeyAction } from 'actions/wallet';
 import PrivKeyWallet from 'libs/wallet/privkey';
 
-function* unlockPrivateKey(action: UnlockPrivateKeyAction) {
-    yield put(saveWallet(new PrivKeyWallet(action.payload)));
+function* init() {
+    yield put(initWallet());
+    // const node = select(node);
+    // yield call();
+    // fetch balance,
+    // fetch tokens
+    yield delay(100);
 }
 
-export default function* notificationsSaga() {
+function* unlockPrivateKey(action?: UnlockPrivateKeyAction) {
+    if (!action) return;
+    yield put(saveWallet(new PrivKeyWallet(action.payload)));
+    yield call(init);
+}
+
+export default function* notificationsSaga(): Generator<Effect, void, any> {
     yield takeEvery('WALLET_UNLOCK_PRIVATE_KEY', unlockPrivateKey);
 }
diff --git a/flow-typed/redux-saga_v0.14.x.js b/flow-typed/redux-saga_v0.14.x.js
new file mode 100644
index 00000000..3ace3fcb
--- /dev/null
+++ b/flow-typed/redux-saga_v0.14.x.js
@@ -0,0 +1,508 @@
+declare type ReduxSaga$Predicate<T> = (arg: T) => boolean;
+
+declare interface ReduxSaga$Task {
+    isRunning(): boolean,
+    isCancelled(): boolean,
+    result(): any,
+    result<T>(): T,
+    error(): any,
+    done: Promise<any>,
+    cancel(): void
+}
+
+declare interface ReduxSaga$Buffer<T> {
+    isEmpty(): boolean,
+    put(message: T): void,
+    take(): T
+}
+
+declare interface ReduxSaga$Channel<T> {
+    take(cb: (message: T) => void, matcher?: ReduxSaga$Predicate<T>): void,
+    put(message: T): void,
+    close(): void
+}
+
+declare module 'redux-saga/effects' {
+    declare type Predicate<T> = ReduxSaga$Predicate<T>;
+    declare type Task = ReduxSaga$Task;
+    declare type Buffer<T> = ReduxSaga$Buffer<T>;
+    declare type Channel<T> = ReduxSaga$Channel<T>;
+    declare type Action = { type: $Subtype<string> };
+    declare type Pattern<T> = string | Predicate<T> | (string | Predicate<T>)[];
+
+    declare type Effect =
+        | TakeEffect<any>
+        | PutEffect<any>
+        | RaceEffect
+        | CallEffect
+        | CpsEffect
+        | ForkEffect
+        | JoinEffect
+        | CancelEffect
+        | SelectEffect
+        | ActionChannelEffect<any>
+        | CancelledEffect
+        | FlushEffect<any>;
+
+    // take
+    declare interface TakeEffectDescriptor<T> {
+        pattern: Pattern<T>,
+        channel: Channel<T>,
+        maybe?: boolean
+    }
+
+    declare interface TakeEffect<T> {
+        TAKE: TakeEffectDescriptor<T>
+    }
+
+    declare var take: {
+        <T>(pattern: Pattern<T>): TakeEffect<T>,
+        <T>(channel: Channel<T>): TakeEffect<T>,
+        maybe: {
+            <T>(pattern: Pattern<T>): TakeEffect<T>,
+            <T>(channel: Channel<T>): TakeEffect<T>
+        }
+    };
+
+    declare var takem: void;
+
+    // put
+    declare interface PutEffectDescriptor<T> {
+        action: T,
+        channel: Channel<T>
+    }
+
+    declare interface PutEffect<T> {
+        PUT: PutEffectDescriptor<T>
+    }
+
+    declare var put: {
+        <T: Action>(action: T): PutEffect<T>,
+        <T: Action>(channel: Channel<T>, action: T): PutEffect<T>,
+        resolve: {
+            <T: Action>(action: T): PutEffect<T>,
+            <T: Action>(channel: Channel<T>, action: T): PutEffect<T>
+        },
+        sync: void
+    };
+
+    // race
+    declare type RaceEffectDescriptor = { [key: string]: Effect };
+
+    declare interface RaceEffect {
+        RACE: RaceEffectDescriptor
+    }
+
+    declare function race(effects: { [key: string]: Effect }): RaceEffect;
+
+    // call & apply
+    declare interface CallEffectDescriptor {
+        context: any,
+        fn: Function,
+        args: any[]
+    }
+
+    declare type Collable0 = () => any;
+    declare type Collable1<A> = (a: A) => any;
+    declare type Collable2<A, B> = (a: A, b: B) => any;
+    declare type Collable3<A, B, C> = (a: A, b: B, c: C) => any;
+    declare type Collable4<A, B, C, D> = (a: A, b: B, c: C, d: D) => any;
+    declare type Collable5<A, B, C, D, E> = (a: A, b: B, c: C, d: D, e: E) => any;
+    declare type CollableR = (...args: mixed[]) => any;
+
+    declare type CallEffectArg<F> = F | [any, F] | { context: any, fn: F };
+
+    declare interface CallEffect {
+        CALL: CallEffectDescriptor
+    }
+
+    declare type CallEffectFactory<R> = {
+        (fn: CallEffectArg<Collable0>): R,
+        <A>(fn: CallEffectArg<Collable1<A>>, a: A): R,
+        <A, B>(fn: CallEffectArg<Collable2<A, B>>, a: A, b: B): R,
+        <A, B, C>(fn: CallEffectArg<Collable3<A, B, C>>, a: A, b: B, c: C): R,
+        <A, B, C, D>(fn: CallEffectArg<Collable4<A, B, C, D>>, a: A, b: B, c: C, d: D): R,
+        <A, B, C, D, E>(
+            fn: CallEffectArg<Collable5<A, B, C, D, E>>,
+            a: A,
+            b: B,
+            c: C,
+            d: D,
+            e: E
+        ): R,
+        (fn: CallEffectArg<CollableR>, ...args: any[]): R
+    };
+
+    declare var call: CallEffectFactory<CallEffect>;
+
+    declare var apply: {
+        (context: any, fn: Collable0): CallEffect,
+        <A>(context: any, fn: Collable1<A>, args: [A]): CallEffect,
+        <A, B>(context: any, fn: Collable2<A, B>, args: [A, B]): CallEffect,
+        <A, B, C>(context: any, fn: Collable3<A, B, C>, args: [A, B, C]): CallEffect,
+        <A, B, C, D>(context: any, fn: Collable4<A, B, C, D>, args: [A, B, C, D]): CallEffect,
+        <A, B, C, D, E>(
+            context: any,
+            fn: Collable5<A, B, C, D, E>,
+            args: [A, B, C, D, E]
+        ): CallEffect,
+        (context: any, fn: CollableR, args: any[]): CallEffect
+    };
+
+    // cps
+    declare interface CpsEffect {
+        CPS: CallEffectDescriptor
+    }
+
+    declare type CpsCallback = (error: any, result: any) => void;
+
+    declare var cps: {
+        (fn: CallEffectArg<Collable1<CpsCallback>>): CpsEffect,
+        <A>(fn: CallEffectArg<Collable2<A, CpsCallback>>, a: A): CpsEffect,
+        <A, B>(fn: CallEffectArg<Collable3<A, B, CpsCallback>>, a: A, b: B): CpsEffect,
+        <A, B, C>(fn: CallEffectArg<Collable4<A, B, C, CpsCallback>>, a: A, b: B, c: C): CpsEffect,
+        <A, B, C, D>(
+            fn: CallEffectArg<Collable5<A, B, C, D, CpsCallback>>,
+            a: A,
+            b: B,
+            c: C,
+            d: D
+        ): CpsEffect
+    };
+
+    // fork & spawn
+    declare interface ForkEffectDescriptor extends CallEffectDescriptor {
+        detached?: boolean
+    }
+
+    declare interface ForkEffect {
+        FORK: ForkEffectDescriptor
+    }
+
+    declare var fork: CallEffectFactory<ForkEffect>;
+    declare var spawn: CallEffectFactory<ForkEffect>;
+
+    // join
+    declare interface JoinEffect {
+        JOIN: Task
+    }
+
+    declare function join(task: Task): JoinEffect;
+
+    // cancel
+    declare interface CancelEffect {
+        CANCEL: Task
+    }
+
+    declare function cancel(task: Task): CancelEffect;
+
+    // select
+    declare interface SelectEffectDescriptor {
+        selector(state: any, ...args: any[]): any,
+        args: any[]
+    }
+
+    declare interface SelectEffect {
+        SELECT: SelectEffectDescriptor
+    }
+
+    declare var select: {
+        (): SelectEffect,
+        <S>(selector: Collable1<S>): SelectEffect,
+        <S, A>(selector: Collable2<S, A>, a: A): SelectEffect,
+        <S, A, B>(selector: Collable3<S, A, B>, a: A, b: B): SelectEffect,
+        <S, A, B, C>(selector: Collable4<S, A, B, C>, a: A, b: B, c: C): SelectEffect,
+        <S, A, B, C, D>(selector: Collable5<S, A, B, C, D>, a: A, b: B, c: C, d: D): SelectEffect,
+        (selector: CollableR, ...rest: any[]): SelectEffect
+    };
+
+    // actionChannel
+    declare interface ActionChannelEffectDescriptor<T> {
+        pattern: Pattern<T>,
+        buffer: Buffer<T>
+    }
+
+    declare interface ActionChannelEffect<T> {
+        ACTION_CHANNEL: ActionChannelEffectDescriptor<T>
+    }
+
+    declare function actionChannel<T>(
+        pattern: Pattern<T>,
+        buffer?: Buffer<T>
+    ): ActionChannelEffect<T>;
+
+    // actionChannel
+    declare interface CancelledEffect {
+        CANCELLED: {}
+    }
+
+    declare function cancelled(): CancelledEffect;
+
+    // flush
+    declare interface FlushEffect<T> {
+        FLUSH: Channel<T>
+    }
+
+    declare function flush<T>(channel: Channel<T>): FlushEffect<T>;
+
+    // takeEvery & takeLatest
+    declare type Workable0<A> = (action?: A) => any;
+    declare type Workable1<A, B> = (b: B, action?: A) => any;
+    declare type Workable2<A, B, C> = (b: B, c: C, action?: A) => any;
+    declare type Workable3<A, B, C, D> = (b: B, c: C, d: D, action?: A) => any;
+    declare type Workable4<A, B, C, D, E> = (b: B, c: C, d: D, e: E, action?: A) => any;
+    declare type WorkableR<A, B, C, D, E, F> = (
+        b: B,
+        c: C,
+        d: D,
+        e: E,
+        f: F,
+        ...args: mixed[]
+    ) => any;
+
+    declare interface TakeHelper {
+        <A>(pattern: Pattern<A>, worker: Workable0<A>): ForkEffect,
+        <A, B>(pattern: Pattern<A>, worker: Workable1<A, B>, b: B): ForkEffect,
+        <A, B, C>(pattern: Pattern<A>, worker: Workable2<A, B, C>, b: B, c: C): ForkEffect,
+        <A, B, C, D>(
+            pattern: Pattern<A>,
+            worker: Workable3<A, B, C, D>,
+            b: B,
+            c: C,
+            d: D
+        ): ForkEffect,
+        <A, B, C, D, E>(
+            pattern: Pattern<A>,
+            worker: Workable4<A, B, C, D, E>,
+            b: B,
+            c: C,
+            d: D,
+            e: E
+        ): ForkEffect,
+        <A, B, C, D, E, F>(
+            pattern: Pattern<A>,
+            worker: WorkableR<A, B, C, D, E, F>,
+            b: B,
+            c: C,
+            d: D,
+            e: E,
+            f: F,
+            ...rest: any[]
+        ): ForkEffect
+    }
+
+    declare var takeEvery: TakeHelper;
+    declare var takeLatest: TakeHelper;
+
+    // throttle
+    declare var throttle: {
+        <A>(ms: number, pattern: Pattern<A>, worker: Workable0<A>): ForkEffect,
+        <A, B>(ms: number, pattern: Pattern<A>, worker: Workable1<A, B>, b: B): ForkEffect,
+        <A, B, C>(
+            ms: number,
+            pattern: Pattern<A>,
+            worker: Workable2<A, B, C>,
+            b: B,
+            c: C
+        ): ForkEffect,
+        <A, B, C, D>(
+            ms: number,
+            pattern: Pattern<A>,
+            worker: Workable3<A, B, C, D>,
+            b: B,
+            c: C,
+            d: D
+        ): ForkEffect,
+        <A, B, C, D, E>(
+            ms: number,
+            pattern: Pattern<A>,
+            worker: Workable4<A, B, C, D, E>,
+            b: B,
+            c: C,
+            d: D,
+            e: E
+        ): ForkEffect,
+        <A, B, C, D, E, F>(
+            ms: number,
+            pattern: Pattern<A>,
+            worker: WorkableR<A, B, C, D, E, F>,
+            b: B,
+            c: C,
+            d: D,
+            e: E,
+            f: F,
+            ...rest: any[]
+        ): ForkEffect
+    };
+}
+
+declare module 'redux-saga/utils' {
+    import type {
+        Effect,
+        TakeEffectDescriptor,
+        PutEffectDescriptor,
+        RaceEffectDescriptor,
+        CallEffectDescriptor,
+        ForkEffectDescriptor,
+        SelectEffectDescriptor,
+        ActionChannelEffectDescriptor
+    } from 'redux-saga/effects';
+
+    declare type Task = ReduxSaga$Task;
+    declare type Channel<T> = ReduxSaga$Channel<T>;
+    declare type Is = ReduxSaga$Predicate<*>;
+    declare interface Deferred<R> {
+        resolve(result: R): void,
+        reject(error: any): void,
+        promise: Promise<R>
+    }
+    declare interface MockTask extends Task {
+        setRunning(running: boolean): void,
+        setResult(result: any): void,
+        setError(error: any): void
+    }
+
+    declare var TASK: '@@redux-saga/TASK';
+
+    declare var SAGA_ACTION: '@@redux-saga/SAGA_ACTION';
+
+    declare function noop(): void;
+
+    declare var is: {
+        undef: Is,
+        notUndef: Is,
+        func: Is,
+        number: Is,
+        array: Is,
+        promise: Is,
+        iterator: Is,
+        task: Is,
+        observable: Is,
+        buffer: Is,
+        pattern: Is,
+        channel: Is,
+        helper: Is,
+        stringableFunc: Is
+    };
+
+    declare function deferred<T, R>(props?: T): T & Deferred<R>;
+
+    declare function arrayOfDeffered<T>(length: number): Deferred<T>[];
+
+    declare function createMockTask(): MockTask;
+
+    declare var asEffect: {
+        take<T>(effect: Effect): ?TakeEffectDescriptor<T>,
+        put<T>(effect: Effect): ?PutEffectDescriptor<T>,
+        race(effect: Effect): ?RaceEffectDescriptor,
+        call(effect: Effect): ?CallEffectDescriptor,
+        cps(effect: Effect): ?CallEffectDescriptor,
+        fork(effect: Effect): ?ForkEffectDescriptor,
+        join(effect: Effect): ?Task,
+        cancel(effect: Effect): ?Task,
+        select(effect: Effect): ?SelectEffectDescriptor,
+        actionChannel<T>(effect: Effect): ?ActionChannelEffectDescriptor<T>,
+        cancelled(effect: Effect): ?{},
+        flush<T>(effect: Effect): ?Channel<T>
+    };
+
+    declare var CHANNEL_END: {
+        toString(): '@@redux-saga/CHANNEL_END'
+    };
+}
+
+declare module 'redux-saga' {
+    import type { Middleware } from 'redux';
+    import type { Effect } from 'redux-saga/effects';
+    import typeof * as Effects from 'redux-saga/effects';
+    import typeof * as Utils from 'redux-saga/utils';
+
+    declare export type Predicate<T> = ReduxSaga$Predicate<T>;
+    declare export type Task = ReduxSaga$Task;
+    declare export type Buffer<T> = ReduxSaga$Buffer<T>;
+    declare export type Channel<T> = ReduxSaga$Channel<T>;
+
+    declare export interface SagaMonitor {
+        effectTriggered(options: {
+            effectId: number,
+            parentEffectId: number,
+            label: string,
+            root?: boolean,
+            effect: Effect
+        }): void,
+        effectResolved(effectId: number, result: any): void,
+        effectRejected(effectId: number, err: any): void,
+        effectCancelled(effectId: number): void,
+        actionDispatched<A>(action: A): void
+    }
+
+    declare type Saga0 = () => Generator<*, *, *>;
+    declare type Saga1<A> = (a: A) => Generator<*, *, *>;
+    declare type Saga2<A, B> = (a: A, b: B) => Generator<*, *, *>;
+    declare type Saga3<A, B, C> = (a: A, b: B, c: C) => Generator<*, *, *>;
+    declare type Saga4<A, B, C, D> = (a: A, b: B, c: C, d: D) => Generator<*, *, *>;
+    declare type SagaR = (...args: mixed[]) => Generator<*, *, *>;
+
+    declare export type SagaMiddleware<S, A> = Middleware<S, A> & {
+        run(saga: Saga0): Task,
+        run<A>(saga: Saga1<A>, a: A): Task,
+        run<A, B>(saga: Saga2<A, B>, a: A, B: B): Task,
+        run<A, B, C>(saga: Saga3<A, B, C>, a: A, B: B, c: C): Task,
+        run<A, B, C, T4>(saga: Saga4<A, B, C, T4>, a: A, B: B, c: C, d: T4): Task,
+        run(saga: SagaR, ...args: any[]): Task
+    };
+
+    declare export type Emit<T> = (input: T) => void;
+
+    declare export default function createSagaMiddleware<T>(options?: {
+        sagaMonitor?: SagaMonitor,
+        emitter: (emit: Emit<T>) => Emit<T>
+    }): SagaMiddleware<*, *>;
+
+    declare export type Unsubscribe = () => void;
+    declare export type Subscribe<T> = (cb: (input: T) => void) => Unsubscribe;
+    declare export type Logger = (level: 'info' | 'warning' | 'error', ...args: Array<any>) => void;
+
+    declare export function runSaga<S, SA, DA>(
+        saga: Generator<*, *, *>,
+        io: {
+            subscribe?: Subscribe<SA>,
+            dispatch?: (input: DA) => any,
+            getState?: () => S,
+            sagaMonitor?: SagaMonitor,
+            logger?: Logger,
+            onError?: void
+        }
+    ): Task;
+
+    declare export var END: { type: '@@redux-saga/CHANNEL_END' };
+
+    declare export function eventChannel<T>(
+        subscribe: Subscribe<T>,
+        buffer?: Buffer<T>,
+        matcher?: Predicate<T>
+    ): Channel<T>;
+
+    declare export function channel<T>(buffer?: Buffer<T>): Channel<T>;
+
+    declare export var buffers: {
+        none<T>(): Buffer<T>,
+        fixed<T>(limit?: number): Buffer<T>,
+        dropping<T>(limit?: number): Buffer<T>,
+        sliding<T>(limit?: number): Buffer<T>,
+        expanding<T>(limit?: number): Buffer<T>
+    };
+
+    // deprecate
+    declare export var takeEvery: void;
+    declare export var takeLatest: void;
+    declare export var throttle: void;
+
+    declare export function delay(ms: number, rest: void): Promise<boolean>;
+    declare export function delay<T>(ms: number, val: T): Promise<T>;
+
+    declare export var CANCEL: '@@redux-saga/cancelPromise';
+
+    declare export var effects: Effects;
+    declare export var utils: Utils;
+}