diff --git a/src/actions/BlockchainActions.js b/src/actions/BlockchainActions.js
new file mode 100644
index 00000000..72f9c111
--- /dev/null
+++ b/src/actions/BlockchainActions.js
@@ -0,0 +1,181 @@
+/* @flow */
+
+import Web3 from 'web3';
+import HDKey from 'hdkey';
+
+import EthereumjsUtil from 'ethereumjs-util';
+import EthereumjsUnits from 'ethereumjs-units';
+import EthereumjsTx from 'ethereumjs-tx';
+import TrezorConnect from 'trezor-connect';
+import BigNumber from 'bignumber.js';
+
+import type { EstimateGasOptions } from 'web3';
+import type { TransactionStatus, TransactionReceipt } from 'web3';
+import { strip } from 'utils/ethUtils';
+import * as BLOCKCHAIN from 'actions/constants/blockchain';
+import * as WEB3 from 'actions/constants/web3';
+import * as PENDING from 'actions/constants/pendingTx';
+
+import * as Web3Actions from './Web3Actions';
+
+import type {
+    TrezorDevice,
+    Dispatch,
+    GetState,
+    Action,
+    AsyncAction,
+    PromiseAction,
+    ThunkAction,
+    AccountDiscovery,
+    EthereumTxRequest
+} from 'flowtype';
+
+import type { Token } from 'reducers/TokensReducer';
+import type { NetworkToken } from 'reducers/LocalStorageReducer';
+
+export type BlockchainAction = {
+    type: typeof BLOCKCHAIN.START | typeof BLOCKCHAIN.CONNECTING,
+    network: string,
+} | {
+    type: typeof BLOCKCHAIN.STOP,
+    network: string,
+};
+
+export const discoverAccount = (device: TrezorDevice, xpub: string, network: string): PromiseAction<AccountDiscovery> => async (dispatch: Dispatch, getState: GetState): Promise<AccountDiscovery> => {
+    // get data from connect
+    // Temporary disabled, enable after trezor-connect@5.0.32 release
+    const txs = await TrezorConnect.ethereumGetAccountInfo({
+        account: {
+            address: xpub,
+            // block: 3984156,
+            block: 0,
+            transactions: 0
+        },
+        coin: network,
+    });
+
+    if (!txs.success) {
+        throw new Error(txs.payload.error);
+    }
+
+    // blockbook web3 fallback
+    const web3account = await dispatch( Web3Actions.discoverAccount(xpub, network) );
+    // return { transactions: txs.payload, ...web3account };
+    return { 
+        transactions: txs.payload.transactions,
+        block: txs.payload.block,
+        balance: web3account.balance,
+        nonce: web3account.nonce,
+    };
+};
+
+export const getTokenInfo = (input: string, network: string): PromiseAction<NetworkToken> => async (dispatch: Dispatch, getState: GetState): Promise<NetworkToken> => {
+    return await dispatch( Web3Actions.getTokenInfo(input, network) );
+}
+
+export const getTokenBalance = (token: Token): PromiseAction<string> => async (dispatch: Dispatch, getState: GetState): Promise<string> => {
+    return await dispatch( Web3Actions.getTokenBalance(token) );
+}
+
+export const getGasPrice = (network: string, defaultGasPrice: number): PromiseAction<BigNumber> => async (dispatch: Dispatch, getState: GetState): Promise<BigNumber> => {
+    try {
+        const gasPrice = await dispatch( Web3Actions.getCurrentGasPrice(network) );
+        return new BigNumber(gasPrice);
+    } catch (error) {
+        return new BigNumber(defaultGasPrice);
+    }
+}
+
+export const estimateGasLimit = (network: string, data: string, value: string, gasPrice: string): PromiseAction<number> => async (dispatch: Dispatch, getState: GetState): Promise<number> => {
+    return await dispatch( Web3Actions.estimateGasLimit(network, { to: '', data, value, gasPrice }) );
+}
+
+export const onBlockMined = (network: string): PromiseAction<void> => async (dispatch: Dispatch, getState: GetState): Promise<void> => {
+
+    // try to resolve pending transactions
+    // await dispatch( Web3Actions.resolvePendingTransactions(network) );
+
+    // get network accounts
+    // const accounts: Array<any> = getState().accounts.filter(a => a.network === network).map(a => {
+    //     return {
+    //         address: a.address,
+    //         block: a.block,
+    //         transactions: a.transactions
+    //     }
+    // });
+    const accounts: Array<any> = getState().accounts.filter(a => a.network === network);
+    
+    // find out which account changed
+    const response = await TrezorConnect.ethereumGetAccountInfo({
+        accounts,
+        coin: network,
+    });
+
+    if (!response.success) {
+
+    } else {
+        response.payload.forEach((a, i) => {
+            if (a.transactions > 0) {
+                dispatch( Web3Actions.updateAccount(accounts[i], a, network) )
+            }
+        });
+    }
+
+    //return await dispatch( Web3Actions.estimateGasLimit(network, { to: '', data, value, gasPrice }) );
+    console.warn("onBlockMined", response)
+}
+
+export const onNotification = (payload: any): PromiseAction<void> => async (dispatch: Dispatch, getState: GetState): Promise<void> => {
+
+    // this event can be triggered multiple times
+    // 1. check if pair [txid + address] is already in reducer
+    const address: string = EthereumjsUtil.toChecksumAddress(payload.tx.address);
+    const txInfo = await dispatch( Web3Actions.getPendingInfo(payload.coin, payload.tx.txid) );
+
+    // const exists = getState().pending.filter(p => p.id === payload.tx.txid && p.address === address);
+    const exists = getState().pending.filter(p => {
+        console.warn("CHECK", p.address === address, p.id === payload.tx.txid, p)
+        return p.address === address;
+    });
+    if (exists.length < 1) {
+        
+        console.warn("TXINFO!", txInfo);
+        if (txInfo) {
+            dispatch({
+                type: PENDING.ADD,
+                payload: {
+                    id: payload.tx.txid,
+                    network: payload.coin,
+                    currency: "tETH",
+                    amount: txInfo.value,
+                    total: "0",
+                    tx: {},
+                    nonce: txInfo.nonce,
+                    address,
+                }
+            });
+        } else {
+            // tx info not found (yet?)
+            // dispatch({
+            //     type: PENDING.ADD_UNKNOWN,
+            //     payload: {
+            //         network: payload.coin,
+            //         ...payload.tx,
+            //     }
+            // });
+        }
+    }
+
+    console.warn("WEB3", payload, exists, getState().pending, address)
+}
+
+
+export const subscribe = (network: string): PromiseAction<void> => async (dispatch: Dispatch, getState: GetState): Promise<void> => {
+    const addresses: Array<string> = getState().accounts.filter(a => a.network === network).map(a => a.address);
+    // $FlowIssue: trezor-connect@5.0.32
+    return await TrezorConnect.blockchainSubscribe({
+        // accounts: addresses,
+        accounts: [],
+        coin: network
+    });
+}
\ No newline at end of file
diff --git a/src/actions/constants/blockchain.js b/src/actions/constants/blockchain.js
new file mode 100644
index 00000000..f0addc68
--- /dev/null
+++ b/src/actions/constants/blockchain.js
@@ -0,0 +1,7 @@
+/* @flow */
+
+export const START: 'backend__start' = 'backend__start';
+export const STOP: 'backend__stop' = 'backend__stop';
+export const CONNECTING: 'backend__connecting' = 'backend__connecting';
+export const CONNECTED: 'backend__connected' = 'backend__connected';
+export const DISCONNECTED: 'backend__disconnected' = 'backend__disconnected';
\ No newline at end of file
diff --git a/src/reducers/BlockchainReducer.js b/src/reducers/BlockchainReducer.js
new file mode 100644
index 00000000..92de9c27
--- /dev/null
+++ b/src/reducers/BlockchainReducer.js
@@ -0,0 +1,62 @@
+/* @flow */
+
+import { BLOCKCHAIN } from 'trezor-connect';
+
+import type { Action } from 'flowtype';
+
+export type BlockchainNetwork = {
+    +name: string;
+    connected: boolean;
+}
+
+export type State = Array<BlockchainNetwork>;
+
+export const initialState: State  = [];
+
+const find = (state: State, name: string): number => {
+    return state.findIndex(b => b.name === name);
+}
+
+const connect = (state: State, action: any): State => {
+    const network: BlockchainNetwork = {
+        name: action.payload.coin,
+        connected: true,
+    }
+    const newState: State = [...state];
+    const index: number = find(newState, action.payload.coin);
+    if (index >= 0) {
+        newState[index] = network;
+    } else {
+        newState.push(network);
+    }
+    return newState;
+};
+
+const disconnect = (state: State, action: any): State => {
+    const network: BlockchainNetwork = {
+        name: action.payload.coin,
+        connected: false,
+    }
+    const newState: State = [...state];
+    const index: number = find(newState, action.payload.coin);
+    if (index >= 0) {
+        newState[index] = network;
+    } else {
+        newState.push(network);
+    }
+    return newState;
+};
+
+
+export default (state: State = initialState, action: Action): State => {
+    switch (action.type) {
+
+        case BLOCKCHAIN.CONNECT:
+            return connect(state, action);
+        case BLOCKCHAIN.ERROR:
+            return disconnect(state, action);
+
+        default:
+            return state;
+    }
+};
\ No newline at end of file
diff --git a/src/reducers/index.js b/src/reducers/index.js
index 1d0be6a7..ed6f1aa6 100644
--- a/src/reducers/index.js
+++ b/src/reducers/index.js
@@ -19,6 +19,7 @@ import pending from 'reducers/PendingTxReducer';
 import fiat from 'reducers/FiatRateReducer';
 import wallet from 'reducers/WalletReducer';
 import devices from 'reducers/DevicesReducer';
+import blockchain from 'reducers/BlockchainReducer';
 
 const reducers = {
     router: routerReducer,
@@ -39,6 +40,7 @@ const reducers = {
     fiat,
     wallet,
     devices,
+    blockchain
 };
 
 export type Reducers = typeof reducers;