diff --git a/Cargo.lock b/Cargo.lock
index f603410f0..d0664d801 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1271,7 +1271,7 @@ dependencies = [
 [[package]]
 name = "parity-ui-precompiled"
 version = "1.4.0"
-source = "git+https://github.com/ethcore/js-precompiled.git#a59b62ecec8773715d1db7e070bbbe5443eb7378"
+source = "git+https://github.com/ethcore/js-precompiled.git#8e8e515f958d2d4a5abec07253a51a052f2b744d"
 dependencies = [
  "parity-dapps-glue 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
diff --git a/js/.babelrc b/js/.babelrc
index 2298d98c0..8147da435 100644
--- a/js/.babelrc
+++ b/js/.babelrc
@@ -7,6 +7,7 @@
     "transform-runtime",
     "transform-decorators-legacy",
     "transform-class-properties",
+    "transform-object-rest-spread",
     "lodash"
   ],
   "retainLines": true,
diff --git a/js/package.json b/js/package.json
index 62bf37b49..ab501f6a7 100644
--- a/js/package.json
+++ b/js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "parity.js",
-  "version": "0.2.99",
+  "version": "0.2.103",
   "main": "release/index.js",
   "jsnext:main": "src/index.js",
   "author": "Parity Team <admin@parity.io>",
@@ -48,25 +48,26 @@
   },
   "devDependencies": {
     "babel-cli": "6.18.0",
-    "babel-core": "6.18.2",
+    "babel-core": "6.20.0",
     "babel-eslint": "7.1.1",
     "babel-loader": "6.2.8",
     "babel-plugin-lodash": "3.2.10",
-    "babel-plugin-transform-class-properties": "6.19.0",
+    "babel-plugin-transform-class-properties": "6.18.0",
     "babel-plugin-transform-decorators-legacy": "1.3.4",
+    "babel-plugin-transform-object-rest-spread": "6.20.2",
     "babel-plugin-transform-react-remove-prop-types": "0.2.11",
     "babel-plugin-transform-runtime": "6.15.0",
-    "babel-polyfill": "6.16.0",
+    "babel-polyfill": "6.20.0",
     "babel-preset-es2015": "6.18.0",
-    "babel-preset-es2015-rollup": "1.2.0",
     "babel-preset-es2016": "6.16.0",
     "babel-preset-es2017": "6.16.0",
     "babel-preset-react": "6.16.0",
     "babel-preset-stage-0": "6.16.0",
     "babel-register": "6.18.0",
-    "babel-runtime": "6.18.0",
+    "babel-runtime": "6.20.0",
     "chai": "3.5.0",
     "chai-enzyme": "0.6.1",
+    "circular-dependency-plugin": "2.0.0",
     "copy-webpack-plugin": "4.0.1",
     "core-js": "2.4.1",
     "coveralls": "2.11.15",
diff --git a/js/scripts/test.js b/js/scripts/test.js
index 318fd7c84..78f2f99bd 100644
--- a/js/scripts/test.js
+++ b/js/scripts/test.js
@@ -1 +1 @@
-// test script 4
+// test script 6
diff --git a/js/src/3rdparty/etherscan/links.js b/js/src/3rdparty/etherscan/links.js
index 2745873fc..e85572850 100644
--- a/js/src/3rdparty/etherscan/links.js
+++ b/js/src/3rdparty/etherscan/links.js
@@ -14,10 +14,14 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
+export const url = (isTestnet = false) => {
+  return `https://${isTestnet ? 'testnet.' : ''}etherscan.io`;
+};
+
 export const txLink = (hash, isTestnet = false) => {
-  return `https://${isTestnet ? 'testnet.' : ''}etherscan.io/tx/${hash}`;
+  return `${url(isTestnet)}/tx/${hash}`;
 };
 
 export const addressLink = (address, isTestnet = false) => {
-  return `https://${isTestnet ? 'testnet.' : ''}etherscan.io/address/${address}`;
+  return `${url(isTestnet)}/address/${address}`;
 };
diff --git a/js/src/api/contract/contract.js b/js/src/api/contract/contract.js
index ed922a02c..1185199e1 100644
--- a/js/src/api/contract/contract.js
+++ b/js/src/api/contract/contract.js
@@ -262,12 +262,11 @@ export default class Contract {
     }
 
     const options = this._getFilterOptions(event, _options);
+    options.fromBlock = 0;
+    options.toBlock = 'latest';
+
     return this._api.eth
-      .getLogs({
-        fromBlock: 0,
-        toBlock: 'latest',
-        ...options
-      })
+      .getLogs(options)
       .then((logs) => this.parseEventLogs(logs));
   }
 
diff --git a/js/src/jsonrpc/rollup.config.js b/js/src/jsonrpc/rollup.config.js
deleted file mode 100644
index cc4f8c931..000000000
--- a/js/src/jsonrpc/rollup.config.js
+++ /dev/null
@@ -1,12 +0,0 @@
-import babel from 'rollup-plugin-babel';
-
-export default {
-  entry: 'src/index.js',
-  dest: 'release/index.js',
-  format: 'cjs',
-  plugins: [babel({
-    babelrc: false,
-    presets: ['es2015-rollup', 'stage-0'],
-    runtimeHelpers: true
-  })]
-};
diff --git a/js/src/modals/AddAddress/addAddress.js b/js/src/modals/AddAddress/addAddress.js
index 590287e73..e44cb0b3c 100644
--- a/js/src/modals/AddAddress/addAddress.js
+++ b/js/src/modals/AddAddress/addAddress.js
@@ -19,7 +19,7 @@ import ContentAdd from 'material-ui/svg-icons/content/add';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
 import { Button, Modal, Form, Input, InputAddress } from '~/ui';
-import { ERRORS, validateAddress, validateName } from '../../util/validation';
+import { ERRORS, validateAddress, validateName } from '~/util/validation';
 
 export default class AddAddress extends Component {
   static contextTypes = {
diff --git a/js/src/modals/AddContract/addContract.js b/js/src/modals/AddContract/addContract.js
index 71f8a911d..b19398001 100644
--- a/js/src/modals/AddContract/addContract.js
+++ b/js/src/modals/AddContract/addContract.js
@@ -21,7 +21,7 @@ import NavigationArrowForward from 'material-ui/svg-icons/navigation/arrow-forwa
 import NavigationArrowBack from 'material-ui/svg-icons/navigation/arrow-back';
 
 import { Button, Modal, Form, Input, InputAddress, RadioButtons } from '~/ui';
-import { ERRORS, validateAbi, validateAddress, validateName } from '../../util/validation';
+import { ERRORS, validateAbi, validateAddress, validateName } from '~/util/validation';
 
 import { eip20, wallet } from '~/contracts/abi';
 
diff --git a/js/src/modals/CreateWallet/createWalletStore.js b/js/src/modals/CreateWallet/createWalletStore.js
index d8c308a12..1d3aa6ee2 100644
--- a/js/src/modals/CreateWallet/createWalletStore.js
+++ b/js/src/modals/CreateWallet/createWalletStore.js
@@ -16,13 +16,12 @@
 
 import { observable, computed, action, transaction } from 'mobx';
 
-import { validateUint, validateAddress, validateName } from '~/util/validation';
-import { ERROR_CODES } from '~/api/transport/error';
-
 import Contract from '~/api/contract';
+import { ERROR_CODES } from '~/api/transport/error';
 import { wallet as walletAbi } from '~/contracts/abi';
 import { wallet as walletCode } from '~/contracts/code';
 
+import { validateUint, validateAddress, validateName } from '~/util/validation';
 import WalletsUtils from '~/util/wallets';
 
 const STEPS = {
diff --git a/js/src/modals/DeployContract/DetailsStep/detailsStep.js b/js/src/modals/DeployContract/DetailsStep/detailsStep.js
index 54ef8f850..aa0a30e55 100644
--- a/js/src/modals/DeployContract/DetailsStep/detailsStep.js
+++ b/js/src/modals/DeployContract/DetailsStep/detailsStep.js
@@ -18,8 +18,8 @@ import React, { Component, PropTypes } from 'react';
 import { MenuItem } from 'material-ui';
 
 import { AddressSelect, Form, Input, Select } from '~/ui';
-import { validateAbi } from '../../../util/validation';
-import { parseAbiType } from '../../../util/abi';
+import { validateAbi } from '~/util/validation';
+import { parseAbiType } from '~/util/abi';
 
 export default class DetailsStep extends Component {
   static contextTypes = {
diff --git a/js/src/modals/DeployContract/ParametersStep/parametersStep.js b/js/src/modals/DeployContract/ParametersStep/parametersStep.js
index 4c7228b67..4ab5df693 100644
--- a/js/src/modals/DeployContract/ParametersStep/parametersStep.js
+++ b/js/src/modals/DeployContract/ParametersStep/parametersStep.js
@@ -32,7 +32,7 @@
 import React, { Component, PropTypes } from 'react';
 
 import { Form, TypedInput } from '~/ui';
-import { parseAbiType } from '../../../util/abi';
+import { parseAbiType } from '~/util/abi';
 
 import styles from '../deployContract.css';
 
diff --git a/js/src/modals/DeployContract/deployContract.js b/js/src/modals/DeployContract/deployContract.js
index ae5578e40..5bf4fc389 100644
--- a/js/src/modals/DeployContract/deployContract.js
+++ b/js/src/modals/DeployContract/deployContract.js
@@ -19,7 +19,7 @@ import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
 import { BusyStep, CompletedStep, CopyToClipboard, Button, IdentityIcon, Modal, TxHash } from '~/ui';
-import { ERRORS, validateAbi, validateCode, validateName } from '../../util/validation';
+import { ERRORS, validateAbi, validateCode, validateName } from '~/util/validation';
 
 import DetailsStep from './DetailsStep';
 import ParametersStep from './ParametersStep';
diff --git a/js/src/modals/EditMeta/editMeta.js b/js/src/modals/EditMeta/editMeta.js
index ad26c19fe..8ab9233f1 100644
--- a/js/src/modals/EditMeta/editMeta.js
+++ b/js/src/modals/EditMeta/editMeta.js
@@ -19,7 +19,7 @@ import ContentClear from 'material-ui/svg-icons/content/clear';
 import ContentSave from 'material-ui/svg-icons/content/save';
 
 import { Button, Form, Input, InputChip, Modal } from '~/ui';
-import { validateName } from '../../util/validation';
+import { validateName } from '~/util/validation';
 
 export default class EditMeta extends Component {
   static contextTypes = {
diff --git a/js/src/modals/ExecuteContract/DetailsStep/detailsStep.js b/js/src/modals/ExecuteContract/DetailsStep/detailsStep.js
index 082fac6a7..b4488729a 100644
--- a/js/src/modals/ExecuteContract/DetailsStep/detailsStep.js
+++ b/js/src/modals/ExecuteContract/DetailsStep/detailsStep.js
@@ -17,7 +17,8 @@
 import React, { Component, PropTypes } from 'react';
 import { MenuItem } from 'material-ui';
 
-import { AddressSelect, Form, Input, InputAddressSelect, Select } from '~/ui';
+import { AddressSelect, Form, Input, Select, TypedInput } from '~/ui';
+import { parseAbiType } from '~/util/abi';
 
 import styles from '../executeContract.css';
 
@@ -74,7 +75,7 @@ export default class DetailsStep extends Component {
 
     const functions = contract.functions
       .filter((func) => !func.constant)
-      .sort((a, b) => a.name.localeCompare(b.name))
+      .sort((a, b) => (a.name || '').localeCompare(b.name || ''))
       .map((func) => {
         const params = (func.abi.inputs || [])
           .map((input, index) => {
@@ -125,56 +126,22 @@ export default class DetailsStep extends Component {
     }
 
     return (func.abi.inputs || []).map((input, index) => {
-      const onChange = (event, value) => onValueChange(event, index, value);
-      const onSelect = (event, _index, value) => onValueChange(event, index, value);
-      const onSubmit = (value) => onValueChange(null, index, value);
+      const onChange = (value) => onValueChange(null, index, value);
       const label = `${input.name}: ${input.type}`;
-      let inputbox;
-
-      switch (input.type) {
-        case 'address':
-          inputbox = (
-            <InputAddressSelect
-              accounts={ accounts }
-              editing
-              label={ label }
-              value={ values[index] }
-              error={ valuesError[index] }
-              onChange={ onChange } />
-          );
-          break;
-
-        case 'bool':
-          const boolitems = ['false', 'true'].map((bool) => {
-            return (
-              <MenuItem
-                key={ bool }
-                value={ bool }
-                label={ bool }>{ bool }</MenuItem>
-            );
-          });
-          inputbox = (
-            <Select
-              label={ label }
-              value={ values[index] ? 'true' : 'false' }
-              error={ valuesError[index] }
-              onChange={ onSelect }>{ boolitems }</Select>
-          );
-          break;
-
-        default:
-          inputbox = (
-            <Input
-              label={ label }
-              value={ values[index] }
-              error={ valuesError[index] }
-              onSubmit={ onSubmit } />
-          );
-      }
 
       return (
-        <div className={ styles.funcparams } key={ index }>
-          { inputbox }
+        <div
+          key={ `${index}_${input.name || ''}` }
+          className={ styles.funcparams }
+        >
+          <TypedInput
+            label={ label }
+            value={ values[index] }
+            error={ valuesError[index] }
+            onChange={ onChange }
+            accounts={ accounts }
+            param={ parseAbiType(input.type) }
+          />
         </div>
       );
     });
diff --git a/js/src/modals/ExecuteContract/executeContract.js b/js/src/modals/ExecuteContract/executeContract.js
index c3b64d738..2db5e2b04 100644
--- a/js/src/modals/ExecuteContract/executeContract.js
+++ b/js/src/modals/ExecuteContract/executeContract.js
@@ -21,8 +21,9 @@ import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
 import { BusyStep, CompletedStep, Button, IdentityIcon, Modal, TxHash } from '~/ui';
-import { MAX_GAS_ESTIMATION } from '../../util/constants';
-import { validateAddress, validateUint } from '../../util/validation';
+import { MAX_GAS_ESTIMATION } from '~/util/constants';
+import { validateAddress, validateUint } from '~/util/validation';
+import { parseAbiType } from '~/util/abi';
 
 import DetailsStep from './DetailsStep';
 
@@ -66,7 +67,7 @@ class ExecuteContract extends Component {
     const { contract } = this.props;
     const functions = contract.functions
       .filter((func) => !func.constant)
-      .sort((a, b) => a.name.localeCompare(b.name));
+      .sort((a, b) => (a.name || '').localeCompare(b.name || ''));
 
     this.onFuncChange(null, functions[0]);
   }
@@ -111,7 +112,7 @@ class ExecuteContract extends Component {
         <Button
           key='postTransaction'
           label='post transaction'
-          disabled={ sending || hasError }
+          disabled={ !!(sending || hasError) }
           icon={ <IdentityIcon address={ fromAddress } button /> }
           onClick={ this.postTransaction } />
       ];
@@ -174,23 +175,9 @@ class ExecuteContract extends Component {
   }
 
   onFuncChange = (event, func) => {
-    const values = func.inputs.map((input) => {
-      switch (input.kind.type) {
-        case 'address':
-          return '0x';
-
-        case 'bool':
-          return false;
-
-        case 'bytes':
-          return '0x';
-
-        case 'uint':
-          return '0';
-
-        default:
-          return '';
-      }
+    const values = (func.abi.inputs || []).map((input) => {
+      const parsedType = parseAbiType(input.type);
+      return parsedType.default;
     });
 
     this.setState({
diff --git a/js/src/modals/SaveContract/saveContract.js b/js/src/modals/SaveContract/saveContract.js
index c73fd8a21..5d7863632 100644
--- a/js/src/modals/SaveContract/saveContract.js
+++ b/js/src/modals/SaveContract/saveContract.js
@@ -20,7 +20,7 @@ import SaveIcon from 'material-ui/svg-icons/content/save';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
 import { Button, Modal, Editor, Form, Input } from '~/ui';
-import { ERRORS, validateName } from '../../util/validation';
+import { ERRORS, validateName } from '~/util/validation';
 
 import styles from './saveContract.css';
 
diff --git a/js/src/modals/Shapeshift/shapeshift.js b/js/src/modals/Shapeshift/shapeshift.js
index 562c8cbf3..9c5d696b0 100644
--- a/js/src/modals/Shapeshift/shapeshift.js
+++ b/js/src/modals/Shapeshift/shapeshift.js
@@ -19,7 +19,7 @@ import ActionDoneAll from 'material-ui/svg-icons/action/done-all';
 import ContentClear from 'material-ui/svg-icons/content/clear';
 
 import { Button, IdentityIcon, Modal } from '~/ui';
-import initShapeshift from '../../3rdparty/shapeshift';
+import initShapeshift from '~/3rdparty/shapeshift';
 import shapeshiftLogo from '../../../assets/images/shapeshift-logo.png';
 
 import AwaitingDepositStep from './AwaitingDepositStep';
diff --git a/js/src/modals/Transfer/Extras/extras.js b/js/src/modals/Transfer/Extras/extras.js
index f7ff4612b..6d2bfc821 100644
--- a/js/src/modals/Transfer/Extras/extras.js
+++ b/js/src/modals/Transfer/Extras/extras.js
@@ -16,96 +16,35 @@
 
 import React, { Component, PropTypes } from 'react';
 
-import Form, { Input } from '~/ui/Form';
-import GasPriceSelector from '../GasPriceSelector';
-
-import styles from '../transfer.css';
+import { GasPriceEditor, Form, Input } from '~/ui';
 
 export default class Extras extends Component {
   static propTypes = {
     isEth: PropTypes.bool,
     data: PropTypes.string,
     dataError: PropTypes.string,
-    gas: PropTypes.string,
-    gasEst: PropTypes.string,
-    gasError: PropTypes.string,
-    gasPrice: PropTypes.oneOfType([
-      PropTypes.string,
-      PropTypes.object
-    ]),
-    gasPriceDefault: PropTypes.string,
-    gasPriceError: PropTypes.string,
-    gasPriceHistogram: PropTypes.object,
     total: PropTypes.string,
     totalError: PropTypes.string,
-    onChange: PropTypes.func.isRequired
+    onChange: PropTypes.func.isRequired,
+    gasStore: PropTypes.object.isRequired
   }
 
   render () {
-    const { gas, gasPrice, gasError, gasEst, gasPriceDefault, gasPriceError, gasPriceHistogram, total, totalError } = this.props;
-
-    const gasLabel = `gas amount (estimated: ${gasEst})`;
-    const priceLabel = `gas price (current: ${gasPriceDefault})`;
+    const { gasStore, onChange, total, totalError } = this.props;
 
     return (
       <Form>
-
         { this.renderData() }
-
-        <div className={ styles.columns }>
-          <div style={ { flex: 65 } }>
-            <GasPriceSelector
-              gasPriceHistogram={ gasPriceHistogram }
-              gasPrice={ gasPrice }
-              onChange={ this.onEditGasPrice }
-            />
-          </div>
-
-          <div
-            className={ styles.row }
-            style={ {
-              flex: 35, paddingLeft: '1rem',
-              justifyContent: 'space-around',
-              paddingBottom: 12
-            } }
-          >
-            <div className={ styles.row }>
-              <Input
-                label={ gasLabel }
-                hint='the amount of gas to use for the transaction'
-                error={ gasError }
-                value={ gas }
-                onChange={ this.onEditGas } />
-
-              <Input
-                label={ priceLabel }
-                hint='the price of gas to use for the transaction'
-                error={ gasPriceError }
-                value={ (gasPrice || '').toString() }
-                onChange={ this.onEditGasPrice } />
-            </div>
-
-            <div className={ styles.row }>
-              <Input
-                disabled
-                label='total transaction amount'
-                hint='the total amount of the transaction'
-                error={ totalError }
-                value={ `${total} ETH` } />
-            </div>
-          </div>
-        </div>
-
-        <div>
-          <p className={ styles.gasPriceDesc }>
-            You can choose the gas price based on the
-            distribution of recent included transactions' gas prices.
-            The lower the gas price is, the cheaper the transaction will
-            be. The higher the gas price is, the faster it should
-            get mined by the network.
-          </p>
-        </div>
-
+        <GasPriceEditor
+          store={ gasStore }
+          onChange={ onChange }>
+          <Input
+            disabled
+            label='total transaction amount'
+            hint='the total amount of the transaction'
+            error={ totalError }
+            value={ `${total} ETH` } />
+        </GasPriceEditor>
       </Form>
     );
   }
@@ -129,14 +68,6 @@ export default class Extras extends Component {
     );
   }
 
-  onEditGas = (event) => {
-    this.props.onChange('gas', event.target.value);
-  }
-
-  onEditGasPrice = (event, value) => {
-    this.props.onChange('gasPrice', value);
-  }
-
   onEditData = (event) => {
     this.props.onChange('data', event.target.value);
   }
diff --git a/js/src/modals/Transfer/store.js b/js/src/modals/Transfer/store.js
index 8f8baf55f..a43057c86 100644
--- a/js/src/modals/Transfer/store.js
+++ b/js/src/modals/Transfer/store.js
@@ -23,7 +23,8 @@ import { bytesToHex } from '~/api/util/format';
 import Contract from '~/api/contract';
 import ERRORS from './errors';
 import { ERROR_CODES } from '~/api/transport/error';
-import { DEFAULT_GAS, DEFAULT_GASPRICE, MAX_GAS_ESTIMATION } from '~/util/constants';
+import { DEFAULT_GAS, MAX_GAS_ESTIMATION } from '~/util/constants';
+import GasPriceStore from '~/ui/GasPriceEditor/store';
 
 const TITLES = {
   transfer: 'transfer details',
@@ -48,14 +49,6 @@ export default class TransferStore {
   @observable data = '';
   @observable dataError = null;
 
-  @observable gas = DEFAULT_GAS;
-  @observable gasError = null;
-
-  @observable gasEst = '0';
-  @observable gasLimitError = null;
-  @observable gasPrice = DEFAULT_GASPRICE;
-  @observable gasPriceError = null;
-
   @observable recipient = '';
   @observable recipientError = ERRORS.requireRecipient;
 
@@ -68,11 +61,8 @@ export default class TransferStore {
   @observable value = '0.0';
   @observable valueError = null;
 
-  gasPriceHistogram = {};
-
   account = null;
   balance = null;
-  gasLimit = null;
   onClose = null;
 
   senders = null;
@@ -81,6 +71,8 @@ export default class TransferStore {
   isWallet = false;
   wallet = null;
 
+  gasStore = null;
+
   @computed get steps () {
     const steps = [].concat(this.extras ? STAGES_EXTRA : STAGES_BASIC);
 
@@ -93,7 +85,7 @@ export default class TransferStore {
 
   @computed get isValid () {
     const detailsValid = !this.recipientError && !this.valueError && !this.totalError && !this.senderError;
-    const extrasValid = !this.gasError && !this.gasPriceError && !this.totalError;
+    const extrasValid = !this.gasStore.errorGas && !this.gasStore.errorPrice && !this.totalError;
     const verifyValid = !this.passwordError;
 
     switch (this.stage) {
@@ -118,11 +110,12 @@ export default class TransferStore {
     const { account, balance, gasLimit, senders, onClose, newError, sendersBalances } = props;
     this.account = account;
     this.balance = balance;
-    this.gasLimit = gasLimit;
     this.onClose = onClose;
     this.isWallet = account && account.wallet;
     this.newError = newError;
 
+    this.gasStore = new GasPriceStore(api, gasLimit);
+
     if (this.isWallet) {
       this.wallet = props.wallet;
       this.walletContract = new Contract(this.api, walletAbi);
@@ -179,26 +172,6 @@ export default class TransferStore {
     }
   }
 
-  @action getDefaults = () => {
-    Promise
-      .all([
-        this.api.parity.gasPriceHistogram(),
-        this.api.eth.gasPrice()
-      ])
-      .then(([gasPriceHistogram, gasPrice]) => {
-        transaction(() => {
-          this.gasPrice = gasPrice.toString();
-          this.gasPriceDefault = gasPrice.toFormat();
-          this.gasPriceHistogram = gasPriceHistogram;
-
-          this.recalculate();
-        });
-      })
-      .catch((error) => {
-        console.warn('getDefaults', error);
-      });
-  }
-
   @action onSend = () => {
     this.onNext();
     this.sending = true;
@@ -281,25 +254,11 @@ export default class TransferStore {
   }
 
   @action _onUpdateGas = (gas) => {
-    const gasError = this._validatePositiveNumber(gas);
-
-    transaction(() => {
-      this.gas = gas;
-      this.gasError = gasError;
-
-      this.recalculate();
-    });
+    this.recalculate();
   }
 
   @action _onUpdateGasPrice = (gasPrice) => {
-    const gasPriceError = this._validatePositiveNumber(gasPrice);
-
-    transaction(() => {
-      this.gasPrice = gasPrice;
-      this.gasPriceError = gasPriceError;
-
-      this.recalculate();
-    });
+    this.recalculate();
   }
 
   @action _onUpdateRecipient = (recipient) => {
@@ -362,7 +321,7 @@ export default class TransferStore {
 
   @action recalculateGas = () => {
     if (!this.isValid) {
-      this.gas = 0;
+      this.gasStore.setGas('0');
       return this.recalculate();
     }
 
@@ -370,28 +329,20 @@ export default class TransferStore {
       .estimateGas()
       .then((gasEst) => {
         let gas = gasEst;
-        let gasLimitError = null;
 
         if (gas.gt(DEFAULT_GAS)) {
           gas = gas.mul(1.2);
         }
 
-        if (gas.gte(MAX_GAS_ESTIMATION)) {
-          gasLimitError = ERRORS.gasException;
-        } else if (gas.gt(this.gasLimit)) {
-          gasLimitError = ERRORS.gasBlockLimit;
-        }
-
         transaction(() => {
-          this.gas = gas.toFixed(0);
-          this.gasEst = gasEst.toFormat();
-          this.gasLimitError = gasLimitError;
+          this.gasStore.setEstimated(gasEst.toFixed(0));
+          this.gasStore.setGas(gas.toFixed(0));
 
           this.recalculate();
         });
       })
       .catch((error) => {
-        console.error('etimateGas', error);
+        console.warn('etimateGas', error);
         this.recalculate();
       });
   }
@@ -411,9 +362,9 @@ export default class TransferStore {
       return;
     }
 
-    const { gas, gasPrice, tag, valueAll, isEth, isWallet } = this;
+    const { tag, valueAll, isEth, isWallet } = this;
 
-    const gasTotal = new BigNumber(gasPrice || 0).mul(new BigNumber(gas || 0));
+    const gasTotal = new BigNumber(this.gasStore.price || 0).mul(new BigNumber(this.gasStore.gas || 0));
 
     const availableEth = new BigNumber(balance.tokens[0].value);
 
@@ -453,7 +404,7 @@ export default class TransferStore {
     }
 
     transaction(() => {
-      this.total = this.api.util.fromWei(totalEth).toString();
+      this.total = this.api.util.fromWei(totalEth).toFixed();
       this.totalError = totalError;
       this.value = value;
       this.valueError = valueError;
@@ -522,8 +473,8 @@ export default class TransferStore {
     };
 
     if (!gas) {
-      options.gas = this.gas;
-      options.gasPrice = this.gasPrice;
+      options.gas = this.gasStore.gas;
+      options.gasPrice = this.gasStore.price;
     } else {
       options.gas = MAX_GAS_ESTIMATION;
     }
diff --git a/js/src/modals/Transfer/transfer.css b/js/src/modals/Transfer/transfer.css
index 3bd17ba96..28612f299 100644
--- a/js/src/modals/Transfer/transfer.css
+++ b/js/src/modals/Transfer/transfer.css
@@ -144,15 +144,6 @@
   font-size: 1.2rem;
 }
 
-.chart {
-  position: absolute;
-  width: 100%;
-}
-
-.gasPriceDesc {
-  font-size: 0.9em;
-}
-
 .warning {
   border-radius: 0.5em;
   background: #f80;
diff --git a/js/src/modals/Transfer/transfer.js b/js/src/modals/Transfer/transfer.js
index e1e2a0951..00e84adaf 100644
--- a/js/src/modals/Transfer/transfer.js
+++ b/js/src/modals/Transfer/transfer.js
@@ -56,10 +56,6 @@ class Transfer extends Component {
 
   store = new TransferStore(this.context.api, this.props);
 
-  componentDidMount () {
-    this.store.getDefaults();
-  }
-
   render () {
     const { stage, extras, steps } = this.store;
 
@@ -186,27 +182,20 @@ class Transfer extends Component {
   }
 
   renderExtrasPage () {
-    if (!this.store.gasPriceHistogram) {
+    if (!this.store.gasStore.histogram) {
       return null;
     }
 
-    const { isEth, data, dataError, gas, gasEst, gasError, gasPrice } = this.store;
-    const { gasPriceDefault, gasPriceError, gasPriceHistogram, total, totalError } = this.store;
+    const { isEth, data, dataError, total, totalError } = this.store;
 
     return (
       <Extras
         isEth={ isEth }
         data={ data }
         dataError={ dataError }
-        gas={ gas }
-        gasEst={ gasEst }
-        gasError={ gasError }
-        gasPrice={ gasPrice }
-        gasPriceDefault={ gasPriceDefault }
-        gasPriceError={ gasPriceError }
-        gasPriceHistogram={ gasPriceHistogram }
         total={ total }
         totalError={ totalError }
+        gasStore={ this.store.gasStore }
         onChange={ this.store.onUpdateDetails } />
     );
   }
@@ -263,15 +252,15 @@ class Transfer extends Component {
   }
 
   renderWarning () {
-    const { gasLimitError } = this.store;
+    const { errorEstimated } = this.store.gasStore;
 
-    if (!gasLimitError) {
+    if (!errorEstimated) {
       return null;
     }
 
     return (
       <div className={ styles.warning }>
-        { gasLimitError }
+        { errorEstimated }
       </div>
     );
   }
diff --git a/js/src/modals/Verification/store.js b/js/src/modals/Verification/store.js
index 21213e724..7cd47bd6e 100644
--- a/js/src/modals/Verification/store.js
+++ b/js/src/modals/Verification/store.js
@@ -19,9 +19,8 @@ import { sha3 } from '~/api/util/sha3';
 import Contract from '~/api/contract';
 import Contracts from '~/contracts';
 
-import { checkIfVerified, checkIfRequested, awaitPuzzle } from '~/contracts/verification';
-import checkIfTxFailed from '../../util/check-if-tx-failed';
-import waitForConfirmations from '../../util/wait-for-block-confirmations';
+import { checkIfVerified, checkIfRequested, awaitPuzzle } from '~/contracts/sms-verification';
+import { checkIfTxFailed, waitForConfirmations } from '~/util/tx';
 
 export const LOADING = 'fetching-contract';
 export const QUERY_DATA = 'query-data';
diff --git a/js/src/redux/providers/compilerWorker.js b/js/src/redux/providers/compilerWorker.js
index 247333f5e..f624a4e5f 100644
--- a/js/src/redux/providers/compilerWorker.js
+++ b/js/src/redux/providers/compilerWorker.js
@@ -92,7 +92,7 @@ function findImports (path) {
   return { error: 'File not found' };
 }
 
-function compile (data) {
+function compile (data, optimized = 1) {
   const { sourcecode, build } = data;
   const { longVersion } = build;
 
@@ -109,7 +109,7 @@ function compile (data) {
         '': sourcecode
       };
 
-      const compiled = compiler.compile({ sources: input }, 0, findImports);
+      const compiled = compiler.compile({ sources: input }, optimized, findImports);
 
       self.lastCompile = {
         version: longVersion, result: compiled,
diff --git a/js/src/redux/providers/walletActions.js b/js/src/redux/providers/walletActions.js
index 10f6a278e..4a8a3f82a 100644
--- a/js/src/redux/providers/walletActions.js
+++ b/js/src/redux/providers/walletActions.js
@@ -17,12 +17,10 @@
 import { isEqual, uniq } from 'lodash';
 
 import Contract from '~/api/contract';
-import { wallet as WALLET_ABI } from '~/contracts/abi';
 import { bytesToHex, toHex } from '~/api/util/format';
-
 import { ERROR_CODES } from '~/api/transport/error';
-import { MAX_GAS_ESTIMATION } from '../../util/constants';
-
+import { wallet as WALLET_ABI } from '~/contracts/abi';
+import { MAX_GAS_ESTIMATION } from '~/util/constants';
 import WalletsUtils from '~/util/wallets';
 
 import { newError } from '~/ui/Errors/actions';
@@ -58,7 +56,7 @@ function modifyOperation (method, address, owner, operation) {
     contract.instance[method]
       .estimateGas(options, values)
       .then((gas) => {
-        options.gas = gas;
+        options.gas = gas.mul(1.2);
         return contract.instance[method].postTransaction(options, values);
       })
       .then((requestId) => {
diff --git a/js/src/ui/Form/TypedInput/typedInput.js b/js/src/ui/Form/TypedInput/typedInput.js
index 9162348e0..a81ec7b79 100644
--- a/js/src/ui/Form/TypedInput/typedInput.js
+++ b/js/src/ui/Form/TypedInput/typedInput.js
@@ -22,12 +22,11 @@ import IconButton from 'material-ui/IconButton';
 import AddIcon from 'material-ui/svg-icons/content/add';
 import RemoveIcon from 'material-ui/svg-icons/content/remove';
 
+import { fromWei, toWei } from '~/api/util/wei';
 import Input from '~/ui/Form/Input';
 import InputAddressSelect from '~/ui/Form/InputAddressSelect';
 import Select from '~/ui/Form/Select';
-
 import { ABI_TYPES } from '~/util/abi';
-import { fromWei, toWei } from '~/api/util/wei';
 
 import styles from './typedInput.css';
 
diff --git a/js/src/modals/Transfer/GasPriceSelector/gasPriceSelector.css b/js/src/ui/GasPriceEditor/GasPriceSelector/gasPriceSelector.css
similarity index 85%
rename from js/src/modals/Transfer/GasPriceSelector/gasPriceSelector.css
rename to js/src/ui/GasPriceEditor/GasPriceSelector/gasPriceSelector.css
index 445174c59..247211c50 100644
--- a/js/src/modals/Transfer/GasPriceSelector/gasPriceSelector.css
+++ b/js/src/ui/GasPriceEditor/GasPriceSelector/gasPriceSelector.css
@@ -15,3 +15,13 @@
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+.chart {
+  position: absolute;
+  width: 100%;
+}
+
+.columns {
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
+}
diff --git a/js/src/modals/Transfer/GasPriceSelector/gasPriceSelector.js b/js/src/ui/GasPriceEditor/GasPriceSelector/gasPriceSelector.js
similarity index 77%
rename from js/src/modals/Transfer/GasPriceSelector/gasPriceSelector.js
rename to js/src/ui/GasPriceEditor/GasPriceSelector/gasPriceSelector.js
index adf644c4e..893a50188 100644
--- a/js/src/modals/Transfer/GasPriceSelector/gasPriceSelector.js
+++ b/js/src/ui/GasPriceEditor/GasPriceSelector/gasPriceSelector.js
@@ -29,10 +29,7 @@ import {
 import Slider from 'material-ui/Slider';
 import BigNumber from 'bignumber.js';
 
-import componentStyles from './gasPriceSelector.css';
-import mainStyles from '../transfer.css';
-
-const styles = Object.assign({}, mainStyles, componentStyles);
+import styles from './gasPriceSelector.css';
 
 const COLORS = {
   default: 'rgba(255, 99, 132, 0.2)',
@@ -194,10 +191,7 @@ class CustomizedShape extends Component {
 
 class CustomTooltip extends Component {
   static propTypes = {
-    gasPriceHistogram: PropTypes.shape({
-      bucketBounds: PropTypes.array.isRequired,
-      counts: PropTypes.array.isRequired
-    }).isRequired,
+    gasPriceHistogram: PropTypes.object.isRequired,
     type: PropTypes.string,
     payload: PropTypes.array,
     label: PropTypes.number,
@@ -231,12 +225,16 @@ class CustomTooltip extends Component {
   }
 }
 
+const TOOL_STYLE = {
+  color: 'rgba(255,255,255,0.5)',
+  backgroundColor: 'rgba(0, 0, 0, 0.75)',
+  padding: '0 0.5em',
+  fontSize: '0.75em'
+};
+
 export default class GasPriceSelector extends Component {
   static propTypes = {
-    gasPriceHistogram: PropTypes.shape({
-      bucketBounds: PropTypes.array.isRequired,
-      counts: PropTypes.array.isRequired
-    }).isRequired,
+    gasPriceHistogram: PropTypes.object.isRequired,
     onChange: PropTypes.func.isRequired,
 
     gasPrice: PropTypes.oneOfType([
@@ -287,21 +285,23 @@ export default class GasPriceSelector extends Component {
   renderSlider () {
     const { sliderValue } = this.state;
 
-    return (<div className={ styles.columns }>
-      <Slider
-        min={ 0 }
-        max={ 1 }
-        value={ sliderValue }
-        onChange={ this.onEditGasPriceSlider }
-        style={ {
-          flex: 1,
-          padding: '0 0.3em'
-        } }
-        sliderStyle={ {
-          marginBottom: 12
-        } }
-      />
-    </div>);
+    return (
+      <div className={ styles.columns }>
+        <Slider
+          min={ 0 }
+          max={ 1 }
+          value={ sliderValue }
+          onChange={ this.onEditGasPriceSlider }
+          style={ {
+            flex: 1,
+            padding: '0 0.3em'
+          } }
+          sliderStyle={ {
+            marginBottom: 12
+          } }
+        />
+      </div>
+    );
   }
 
   renderChart () {
@@ -316,85 +316,83 @@ export default class GasPriceSelector extends Component {
     const countIndex = Math.max(0, Math.min(selectedIndex, gasPriceHistogram.counts.length - 1));
     const selectedCount = countModifier(gasPriceHistogram.counts[countIndex]);
 
-    return (<div className={ styles.columns }>
-      <div style={ { flex: 1, height } }>
-        <div className={ styles.chart }>
-          <ResponsiveContainer
-            height={ height }
-          >
-            <ScatterChart
-              margin={ { top: 0, right: 0, left: 0, bottom: 0 } }
+    return (
+      <div className={ styles.columns }>
+        <div style={ { flex: 1, height } }>
+          <div className={ styles.chart }>
+            <ResponsiveContainer
+              height={ height }
             >
-              <Scatter
-                data={ [
-                  { x: sliderValue, y: 0 },
-                  { x: sliderValue, y: selectedCount },
-                  { x: sliderValue, y: chartData.yDomain[1] }
-                ] }
-                shape={ <CustomizedShape showValue={ selectedCount } /> }
-                line
-                isAnimationActive={ false }
-              />
+              <ScatterChart
+                margin={ { top: 0, right: 0, left: 0, bottom: 0 } }
+              >
+                <Scatter
+                  data={ [
+                    { x: sliderValue, y: 0 },
+                    { x: sliderValue, y: selectedCount },
+                    { x: sliderValue, y: chartData.yDomain[1] }
+                  ] }
+                  shape={ <CustomizedShape showValue={ selectedCount } /> }
+                  line
+                  isAnimationActive={ false }
+                />
 
-              <XAxis
-                hide
-                height={ 0 }
-                dataKey='x'
-                domain={ [0, 1] }
-              />
-              <YAxis
-                hide
-                width={ 0 }
-                dataKey='y'
-                domain={ chartData.yDomain }
-              />
-            </ScatterChart>
-          </ResponsiveContainer>
-        </div>
+                <XAxis
+                  hide
+                  height={ 0 }
+                  dataKey='x'
+                  domain={ [0, 1] }
+                />
+                <YAxis
+                  hide
+                  width={ 0 }
+                  dataKey='y'
+                  domain={ chartData.yDomain }
+                />
+              </ScatterChart>
+            </ResponsiveContainer>
+          </div>
 
-        <div className={ styles.chart }>
-          <ResponsiveContainer
-            height={ height }
-          >
-            <BarChart
-              data={ chartData.values }
-              margin={ { top: 0, right: 0, left: 0, bottom: 0 } }
-              barCategoryGap={ 1 }
-              ref='barChart'
+          <div className={ styles.chart }>
+            <ResponsiveContainer
+              height={ height }
             >
-              <Bar
-                dataKey='value'
-                stroke={ COLORS.line }
-                onClick={ this.onClickGasPrice }
-                shape={ <CustomBar selected={ selectedIndex } onClick={ this.onClickGasPrice } /> }
-              />
+              <BarChart
+                data={ chartData.values }
+                margin={ { top: 0, right: 0, left: 0, bottom: 0 } }
+                barCategoryGap={ 1 }
+                ref='barChart'
+              >
+                <Bar
+                  dataKey='value'
+                  stroke={ COLORS.line }
+                  onClick={ this.onClickGasPrice }
+                  shape={ <CustomBar selected={ selectedIndex } onClick={ this.onClickGasPrice } /> }
+                />
 
-              <Tooltip
-                wrapperStyle={ {
-                  backgroundColor: 'rgba(0, 0, 0, 0.75)',
-                  padding: '0 0.5em',
-                  fontSize: '0.9em'
-                } }
-                cursor={ this.renderCustomCursor() }
-                content={ <CustomTooltip gasPriceHistogram={ gasPriceHistogram } /> }
-              />
+                <Tooltip
+                  wrapperStyle={ TOOL_STYLE }
+                  cursor={ this.renderCustomCursor() }
+                  content={ <CustomTooltip gasPriceHistogram={ gasPriceHistogram } /> }
+                />
 
-              <XAxis
-                hide
-                dataKey='index'
-                type='category'
-                domain={ chartData.xDomain }
-              />
-              <YAxis
-                hide
-                type='number'
-                domain={ chartData.yDomain }
-              />
-            </BarChart>
-          </ResponsiveContainer>
+                <XAxis
+                  hide
+                  dataKey='index'
+                  type='category'
+                  domain={ chartData.xDomain }
+                />
+                <YAxis
+                  hide
+                  type='number'
+                  domain={ chartData.yDomain }
+                />
+              </BarChart>
+            </ResponsiveContainer>
+          </div>
         </div>
       </div>
-    </div>);
+    );
   }
 
   renderCustomCursor = () => {
diff --git a/js/src/modals/Transfer/GasPriceSelector/index.js b/js/src/ui/GasPriceEditor/GasPriceSelector/index.js
similarity index 100%
rename from js/src/modals/Transfer/GasPriceSelector/index.js
rename to js/src/ui/GasPriceEditor/GasPriceSelector/index.js
diff --git a/js/src/views/Signer/signer.css b/js/src/ui/GasPriceEditor/gasPriceEditor.css
similarity index 62%
rename from js/src/views/Signer/signer.css
rename to js/src/ui/GasPriceEditor/gasPriceEditor.css
index 83d1b800f..cf1fff81c 100644
--- a/js/src/views/Signer/signer.css
+++ b/js/src/ui/GasPriceEditor/gasPriceEditor.css
@@ -14,11 +14,36 @@
 /* You should have received a copy of the GNU General Public License
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
-.signer {
+
+.columns {
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
 }
 
-.container {
+.graphColumn {
+  flex: 65;
 }
 
-.mainContainer {
+.editColumn {
+  flex: 35;
+  padding-left: 1em;
+  justify-ontent: space-around;
+  padding-bottom: 12;
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
+  flex-direction: column;
+}
+
+.gasPriceDesc {
+  font-size: 0.75em;
+  opacity: 0.5;
+}
+
+.row {
+  display: flex;
+  flex-wrap: wrap;
+  position: relative;
+  flex-direction: column;
 }
diff --git a/js/src/ui/GasPriceEditor/gasPriceEditor.js b/js/src/ui/GasPriceEditor/gasPriceEditor.js
new file mode 100644
index 000000000..c6759ddf1
--- /dev/null
+++ b/js/src/ui/GasPriceEditor/gasPriceEditor.js
@@ -0,0 +1,98 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import BigNumber from 'bignumber.js';
+import React, { Component, PropTypes } from 'react';
+import { observer } from 'mobx-react';
+
+import Input from '../Form/Input';
+import GasPriceSelector from './GasPriceSelector';
+import Store from './store';
+
+import styles from './gasPriceEditor.css';
+
+@observer
+export default class GasPriceEditor extends Component {
+  static propTypes = {
+    children: PropTypes.node,
+    store: PropTypes.object.isRequired,
+    onChange: PropTypes.func
+  }
+
+  static Store = Store;
+
+  render () {
+    const { children, store } = this.props;
+    const { estimated, priceDefault, price, gas, histogram, errorGas, errorPrice } = store;
+
+    const gasLabel = `gas (estimated: ${new BigNumber(estimated).toFormat()})`;
+    const priceLabel = `price (current: ${new BigNumber(priceDefault).toFormat()})`;
+
+    return (
+      <div className={ styles.columns }>
+        <div className={ styles.graphColumn }>
+          <GasPriceSelector
+            gasPriceHistogram={ histogram }
+            gasPrice={ price }
+            onChange={ this.onEditGasPrice } />
+          <div className={ styles.gasPriceDesc }>
+            You can choose the gas price based on the
+            distribution of recent included transaction gas prices.
+            The lower the gas price is, the cheaper the transaction will
+            be. The higher the gas price is, the faster it should
+            get mined by the network.
+          </div>
+        </div>
+
+        <div className={ styles.editColumn }>
+          <div className={ styles.row }>
+            <Input
+              label={ gasLabel }
+              hint='the amount of gas to use for the transaction'
+              error={ errorGas }
+              value={ gas }
+              onChange={ this.onEditGas } />
+
+            <Input
+              label={ priceLabel }
+              hint='the price of gas to use for the transaction'
+              error={ errorPrice }
+              value={ price }
+              onChange={ this.onEditGasPrice } />
+          </div>
+
+          <div className={ styles.row }>
+            { children }
+          </div>
+        </div>
+      </div>
+    );
+  }
+
+  onEditGas = (event, gas) => {
+    const { store, onChange } = this.props;
+
+    store.setGas(gas);
+    onChange && onChange('gas', gas);
+  }
+
+  onEditGasPrice = (event, price) => {
+    const { store, onChange } = this.props;
+
+    store.setPrice(price);
+    onChange && onChange('gasPrice', price);
+  }
+}
diff --git a/js/src/views/Status/components-compositors/Animated/index.js b/js/src/ui/GasPriceEditor/index.js
similarity index 94%
rename from js/src/views/Status/components-compositors/Animated/index.js
rename to js/src/ui/GasPriceEditor/index.js
index ee48d0704..956f6ffd2 100644
--- a/js/src/views/Status/components-compositors/Animated/index.js
+++ b/js/src/ui/GasPriceEditor/index.js
@@ -14,4 +14,4 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-export default from './Animated';
+export default from './gasPriceEditor';
diff --git a/js/src/ui/GasPriceEditor/store.js b/js/src/ui/GasPriceEditor/store.js
new file mode 100644
index 000000000..3f3e50430
--- /dev/null
+++ b/js/src/ui/GasPriceEditor/store.js
@@ -0,0 +1,105 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import BigNumber from 'bignumber.js';
+import { action, observable, transaction } from 'mobx';
+
+import { ERRORS, validatePositiveNumber } from '~/util/validation';
+import { DEFAULT_GAS, DEFAULT_GASPRICE, MAX_GAS_ESTIMATION } from '~/util/constants';
+
+export default class GasPriceEditor {
+  @observable errorEstimated = null;
+  @observable errorGas = null;
+  @observable errorPrice = null;
+  @observable estimated = DEFAULT_GAS;
+  @observable histogram = null;
+  @observable price = DEFAULT_GASPRICE;
+  @observable priceDefault = DEFAULT_GASPRICE;
+  @observable gas = DEFAULT_GAS;
+  @observable gasLimit = 0;
+
+  constructor (api, gasLimit, loadDefaults = true) {
+    this._api = api;
+    this.gasLimit = gasLimit;
+
+    if (loadDefaults) {
+      this.loadDefaults();
+    }
+  }
+
+  @action setEstimated = (estimated) => {
+    transaction(() => {
+      const bn = new BigNumber(estimated);
+
+      this.estimated = estimated;
+
+      if (bn.gte(MAX_GAS_ESTIMATION)) {
+        this.errorEstimated = ERRORS.gasException;
+      } else if (bn.gte(this.gasLimit)) {
+        this.errorEstimated = ERRORS.gasBlockLimit;
+      } else {
+        this.errorEstimated = null;
+      }
+    });
+  }
+
+  @action setHistogram = (gasHistogram) => {
+    this.histogram = gasHistogram;
+  }
+
+  @action setPrice = (price) => {
+    transaction(() => {
+      this.errorPrice = validatePositiveNumber(price).numberError;
+      this.price = price;
+    });
+  }
+
+  @action setGas = (gas) => {
+    transaction(() => {
+      const { numberError } = validatePositiveNumber(gas);
+      const bn = new BigNumber(gas);
+
+      this.gas = gas;
+
+      if (numberError) {
+        this.errorGas = numberError;
+      } else if (bn.gte(this.gasLimit)) {
+        this.errorGas = ERRORS.gasBlockLimit;
+      } else {
+        this.errorGas = null;
+      }
+    });
+  }
+
+  @action loadDefaults () {
+    Promise
+      .all([
+        this._api.parity.gasPriceHistogram(),
+        this._api.eth.gasPrice()
+      ])
+      .then(([gasPriceHistogram, gasPrice]) => {
+        transaction(() => {
+          this.setPrice(gasPrice.toFixed(0));
+          this.setHistogram(gasPriceHistogram);
+
+          this.priceDefault = gasPrice.toFixed();
+        });
+      })
+      .catch((error) => {
+        console.warn('getDefaults', error);
+      });
+  }
+}
diff --git a/js/src/ui/TxHash/txHash.js b/js/src/ui/TxHash/txHash.js
index 81c4e0bf5..715568fd9 100644
--- a/js/src/ui/TxHash/txHash.js
+++ b/js/src/ui/TxHash/txHash.js
@@ -20,7 +20,7 @@ import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 import { LinearProgress } from 'material-ui';
 
-import { txLink } from '../../3rdparty/etherscan/links';
+import { txLink } from '~/3rdparty/etherscan/links';
 import ShortenedHash from '../ShortenedHash';
 
 import styles from './txHash.css';
diff --git a/js/src/ui/TxList/txList.js b/js/src/ui/TxList/txList.js
index b8c53c1d9..3f5dab264 100644
--- a/js/src/ui/TxList/txList.js
+++ b/js/src/ui/TxList/txList.js
@@ -20,7 +20,7 @@ import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 import { observer } from 'mobx-react';
 
-import { txLink, addressLink } from '../../3rdparty/etherscan/links';
+import { txLink, addressLink } from '~/3rdparty/etherscan/links';
 
 import IdentityIcon from '../IdentityIcon';
 import IdentityName from '../IdentityName';
diff --git a/js/src/ui/index.js b/js/src/ui/index.js
index 6c763f0f3..c5a965458 100644
--- a/js/src/ui/index.js
+++ b/js/src/ui/index.js
@@ -31,6 +31,7 @@ import CopyToClipboard from './CopyToClipboard';
 import Editor from './Editor';
 import Errors from './Errors';
 import Form, { AddressSelect, FormWrap, TypedInput, Input, InputAddress, InputAddressSelect, InputChip, InputInline, Select, RadioButtons } from './Form';
+import GasPriceEditor from './GasPriceEditor';
 import IdentityIcon from './IdentityIcon';
 import IdentityName from './IdentityName';
 import Loading from './Loading';
@@ -67,7 +68,7 @@ export {
   Errors,
   Form,
   FormWrap,
-  TypedInput,
+  GasPriceEditor,
   Input,
   InputAddress,
   InputAddressSelect,
@@ -91,5 +92,6 @@ export {
   Tooltip,
   Tooltips,
   TxHash,
-  TxList
+  TxList,
+  TypedInput
 };
diff --git a/js/src/util/check-if-tx-failed.js b/js/src/util/check-if-tx-failed.js
deleted file mode 100644
index 39689bedd..000000000
--- a/js/src/util/check-if-tx-failed.js
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright 2015, 2016 Ethcore (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-
-const checkIfTxFailed = (api, tx, gasSent) => {
-  return api.pollMethod('eth_getTransactionReceipt', tx)
-  .then((receipt) => {
-    // TODO: Right now, there's no way to tell wether the EVM code crashed.
-    // Because you usually send a bit more gas than estimated (to make sure
-    // it gets mined quickly), we transaction probably failed if all the gas
-    // has been used up.
-    return receipt.gasUsed.eq(gasSent);
-  });
-};
-
-export default checkIfTxFailed;
diff --git a/js/src/util/is-testnet.js b/js/src/util/is-testnet.js
deleted file mode 100644
index c2bf2c450..000000000
--- a/js/src/util/is-testnet.js
+++ /dev/null
@@ -1,19 +0,0 @@
-// Copyright 2015, 2016 Ethcore (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-
-export default (chain) => {
-  return chain === 'morden' || chain === 'ropsten' || chain === 'testnet';
-};
diff --git a/js/src/util/wait-for-block-confirmations.js b/js/src/util/tx.js
similarity index 73%
rename from js/src/util/wait-for-block-confirmations.js
rename to js/src/util/tx.js
index 79ba2be25..b688d06fe 100644
--- a/js/src/util/wait-for-block-confirmations.js
+++ b/js/src/util/tx.js
@@ -18,7 +18,18 @@ const isValidReceipt = (receipt) => {
   return receipt && receipt.blockNumber && receipt.blockNumber.gt(0);
 };
 
-const waitForConfirmations = (api, tx, confirmations) => {
+export function checkIfTxFailed (api, tx, gasSent) {
+  return api.pollMethod('eth_getTransactionReceipt', tx)
+  .then((receipt) => {
+    // TODO: Right now, there's no way to tell wether the EVM code crashed.
+    // Because you usually send a bit more gas than estimated (to make sure
+    // it gets mined quickly), we transaction probably failed if all the gas
+    // has been used up.
+    return receipt.gasUsed.eq(gasSent);
+  });
+}
+
+export function waitForConfirmations (api, tx, confirmations) {
   return new Promise((resolve, reject) => {
     api.pollMethod('eth_getTransactionReceipt', tx, isValidReceipt)
     .then((receipt) => {
@@ -39,6 +50,4 @@ const waitForConfirmations = (api, tx, confirmations) => {
       .catch(reject);
     });
   });
-};
-
-export default waitForConfirmations;
+}
diff --git a/js/src/util/validation.js b/js/src/util/validation.js
index 2b64141db..3d312a2f4 100644
--- a/js/src/util/validation.js
+++ b/js/src/util/validation.js
@@ -20,6 +20,7 @@ import util from '~/api/util';
 
 export const ERRORS = {
   invalidAddress: 'address is an invalid network address',
+  invalidAmount: 'the supplied amount should be a valid positive number',
   duplicateAddress: 'the address is already in your address book',
   invalidChecksum: 'address has failed the checksum formatting',
   invalidName: 'name should not be blank and longer than 2',
@@ -27,7 +28,9 @@ export const ERRORS = {
   invalidCode: 'code should be the compiled hex string',
   invalidNumber: 'invalid number format',
   negativeNumber: 'input number should be positive',
-  decimalNumber: 'input number should not contain decimals'
+  decimalNumber: 'input number should not contain decimals',
+  gasException: 'the transaction will throw an exception with the current values',
+  gasBlockLimit: 'the transaction execution will exceed the block gas limit'
 };
 
 export function validateAbi (abi, api) {
@@ -133,6 +136,25 @@ export function validateName (name) {
   };
 }
 
+export function validatePositiveNumber (number) {
+  let numberError = null;
+
+  try {
+    const v = new BigNumber(number);
+
+    if (v.lt(0)) {
+      numberError = ERRORS.invalidAmount;
+    }
+  } catch (e) {
+    numberError = ERRORS.invalidAmount;
+  }
+
+  return {
+    number,
+    numberError
+  };
+}
+
 export function validateUint (value) {
   let valueError = null;
 
diff --git a/js/src/views/Account/Transactions/transactions.css b/js/src/views/Account/Transactions/transactions.css
index 13d727deb..6b44d298f 100644
--- a/js/src/views/Account/Transactions/transactions.css
+++ b/js/src/views/Account/Transactions/transactions.css
@@ -15,9 +15,6 @@
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-.transactions {
-}
-
 .infonone {
   opacity: 0.25;
 }
diff --git a/js/src/views/Account/Transactions/transactions.js b/js/src/views/Account/Transactions/transactions.js
index e71781adf..2e98208b6 100644
--- a/js/src/views/Account/Transactions/transactions.js
+++ b/js/src/views/Account/Transactions/transactions.js
@@ -18,7 +18,7 @@ import React, { Component, PropTypes } from 'react';
 import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 
-import etherscan from '../../../3rdparty/etherscan';
+import etherscan from '~/3rdparty/etherscan';
 import { Container, TxList } from '~/ui';
 
 import styles from './transactions.css';
diff --git a/js/src/views/Account/account.css b/js/src/views/Account/account.css
index b1410f23a..a9a039c83 100644
--- a/js/src/views/Account/account.css
+++ b/js/src/views/Account/account.css
@@ -14,8 +14,6 @@
 /* You should have received a copy of the GNU General Public License
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
-.account {
-}
 
 .btnicon {
   width: 24px;
diff --git a/js/src/views/Account/account.js b/js/src/views/Account/account.js
index 3f262bce4..f7e8a5b9e 100644
--- a/js/src/views/Account/account.js
+++ b/js/src/views/Account/account.js
@@ -97,7 +97,7 @@ class Account extends Component {
     }
 
     return (
-      <div className={ styles.account }>
+      <div>
         { this.renderDeleteDialog(account) }
         { this.renderEditDialog(account) }
         { this.renderFundDialog() }
diff --git a/js/src/views/Accounts/accounts.css b/js/src/views/Accounts/accounts.css
index 469f33ddc..317905fd5 100644
--- a/js/src/views/Accounts/accounts.css
+++ b/js/src/views/Accounts/accounts.css
@@ -14,8 +14,6 @@
 /* You should have received a copy of the GNU General Public License
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
-.accounts {
-}
 
 .accountTooltip {
   top: 13.3em;
diff --git a/js/src/views/Accounts/accounts.js b/js/src/views/Accounts/accounts.js
index a8a29945f..4383b7662 100644
--- a/js/src/views/Accounts/accounts.js
+++ b/js/src/views/Accounts/accounts.js
@@ -82,7 +82,7 @@ class Accounts extends Component {
 
   render () {
     return (
-      <div className={ styles.accounts }>
+      <div>
         { this.renderNewDialog() }
         { this.renderNewWalletDialog() }
         { this.renderActionbar() }
diff --git a/js/src/views/Address/address.css b/js/src/views/Address/address.css
index d93b88b59..cd44688bb 100644
--- a/js/src/views/Address/address.css
+++ b/js/src/views/Address/address.css
@@ -14,37 +14,37 @@
 /* You should have received a copy of the GNU General Public License
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
-.address {
-}
 
-.delete .hero {
-  padding-bottom: 1em;
-}
+.delete {
+  .hero {
+    padding-bottom: 1em;
+  }
 
-.delete .info {
-  display: inline-block;
-}
+  .info {
+    display: inline-block;
+  }
 
-.delete .icon {
-  display: inline-block;
-}
+  .icon {
+    display: inline-block;
+  }
 
-.delete .nameinfo {
-  display: inline-block;
-  text-align: left;
-}
+  .nameinfo {
+    display: inline-block;
+    text-align: left;
+  }
 
-.delete .header {
-  text-transform: uppercase;
-  font-size: 1.25em;
-  padding-bottom: 0.25em;
-}
+  .header {
+    text-transform: uppercase;
+    font-size: 1.25em;
+    padding-bottom: 0.25em;
+  }
 
-.delete .address {
-}
+  .address {
+  }
 
-.delete .description {
-  padding-top: 1em;
-  font-size: 0.75em;
-  color: #aaa;
+  .description {
+    padding-top: 1em;
+    font-size: 0.75em;
+    color: #aaa;
+  }
 }
diff --git a/js/src/views/Address/address.js b/js/src/views/Address/address.js
index 0fae3cb1f..c1427b2be 100644
--- a/js/src/views/Address/address.js
+++ b/js/src/views/Address/address.js
@@ -28,8 +28,6 @@ import Transactions from '../Account/Transactions';
 import Delete from './Delete';
 import { setVisibleAccounts } from '~/redux/providers/personalActions';
 
-import styles from './address.css';
-
 class Address extends Component {
   static contextTypes = {
     api: PropTypes.object.isRequired,
@@ -85,7 +83,7 @@ class Address extends Component {
     }
 
     return (
-      <div className={ styles.address }>
+      <div>
         { this.renderEditDialog(contact) }
         { this.renderActionbar(contact) }
         <Delete
diff --git a/js/src/views/Addresses/addresses.css b/js/src/views/Addresses/addresses.css
index 5dbbe9aec..5bbbf8a7e 100644
--- a/js/src/views/Addresses/addresses.css
+++ b/js/src/views/Addresses/addresses.css
@@ -14,8 +14,6 @@
 /* You should have received a copy of the GNU General Public License
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
-.addresses {
-}
 
 .list {
   display: flex;
@@ -26,21 +24,21 @@
   flex: 0 1 50%;
   width: 50%;
   position: relative;
-}
 
-.address:nth-child(odd)>div {
-  padding-right: 0.5em !important;
-}
+  &:nth-child(odd)>div {
+    padding-right: 0.5em !important;
+  }
 
-.address:nth-child(even)>div {
-  padding-left: 0.5em !important;
+  &:nth-child(even)>div {
+    padding-left: 0.5em !important;
+  }
 }
 
 .empty {
   width: 100%;
   display: block;
-}
 
-.empty div {
-  color: #aaa;
+  div {
+    color: #aaa;
+  }
 }
diff --git a/js/src/views/Addresses/addresses.js b/js/src/views/Addresses/addresses.js
index 4edfb0e6e..5e0ed4e18 100644
--- a/js/src/views/Addresses/addresses.js
+++ b/js/src/views/Addresses/addresses.js
@@ -76,7 +76,7 @@ class Addresses extends Component {
     const { searchValues, sortOrder } = this.state;
 
     return (
-      <div className={ styles.addresses }>
+      <div>
         { this.renderActionbar() }
         { this.renderAddAddress() }
         <Page>
diff --git a/js/src/views/Connection/connection.js b/js/src/views/Connection/connection.js
index 451624a2b..ad0e0c140 100644
--- a/js/src/views/Connection/connection.js
+++ b/js/src/views/Connection/connection.js
@@ -19,7 +19,6 @@ import { connect } from 'react-redux';
 import { bindActionCreators } from 'redux';
 import ActionCompareArrows from 'material-ui/svg-icons/action/compare-arrows';
 import ActionDashboard from 'material-ui/svg-icons/action/dashboard';
-// import CommunicationVpnKey from 'material-ui/svg-icons/communication/vpn-key';
 import HardwareDesktopMac from 'material-ui/svg-icons/hardware/desktop-mac';
 import NotificationVpnLock from 'material-ui/svg-icons/notification/vpn-lock';
 
diff --git a/js/src/views/Contract/Events/Event/event.js b/js/src/views/Contract/Events/Event/event.js
index b42295198..1ed114d07 100644
--- a/js/src/views/Contract/Events/Event/event.js
+++ b/js/src/views/Contract/Events/Event/event.js
@@ -20,7 +20,7 @@ import React, { Component, PropTypes } from 'react';
 
 import { IdentityIcon, IdentityName, Input, InputAddress } from '~/ui';
 import ShortenedHash from '~/ui/ShortenedHash';
-import { txLink } from '../../../../3rdparty/etherscan/links';
+import { txLink } from '~/3rdparty/etherscan/links';
 
 import styles from '../../contract.css';
 
diff --git a/js/src/views/Contract/Events/events.js b/js/src/views/Contract/Events/events.js
index f0bee3e25..69ae8fd6a 100644
--- a/js/src/views/Contract/Events/events.js
+++ b/js/src/views/Contract/Events/events.js
@@ -15,6 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
+import { uniq } from 'lodash';
 
 import { Container } from '~/ui';
 
@@ -38,7 +39,10 @@ export default class Events extends Component {
       return null;
     }
 
-    const list = events.map((event) => {
+    const eventsKey = uniq(events.map((e) => e.key));
+    const list = eventsKey.map((eventKey) => {
+      const event = events.find((e) => e.key === eventKey);
+
       return (
         <Event
           key={ event.key }
diff --git a/js/src/views/Contract/contract.css b/js/src/views/Contract/contract.css
index eb6cabfa2..f49da0831 100644
--- a/js/src/views/Contract/contract.css
+++ b/js/src/views/Contract/contract.css
@@ -15,26 +15,26 @@
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-.contract {
-}
-
 .events {
   width: 100%;
   border: none;
   border-spacing: 0;
-}
 
-.events tr {
-  line-height: 32px;
-  vertical-align: top;
+  tr {
+    line-height: 32px;
+    vertical-align: top;
+  }
 }
 
 .event {
-}
+  td {
+    vertical-align: top;
+    padding: 1em 0.5em;
 
-.event td {
-  vertical-align: top;
-  padding: 1em 0.5em;
+    div {
+      white-space: nowrap;
+    }
+  }
 }
 
 .txhash {
@@ -47,10 +47,6 @@
   color: #aaa;
 }
 
-.event td div {
-  white-space: nowrap;
-}
-
 .mined {
 }
 
diff --git a/js/src/views/Contract/contract.js b/js/src/views/Contract/contract.js
index 2aa37f847..35ad95fe2 100644
--- a/js/src/views/Contract/contract.js
+++ b/js/src/views/Contract/contract.js
@@ -124,7 +124,7 @@ class Contract extends Component {
     }
 
     return (
-      <div className={ styles.contract }>
+      <div>
         { this.renderActionbar(account) }
         { this.renderDeleteDialog(account) }
         { this.renderEditDialog(account) }
diff --git a/js/src/views/Contracts/contracts.css b/js/src/views/Contracts/contracts.css
deleted file mode 100644
index eab0858e7..000000000
--- a/js/src/views/Contracts/contracts.css
+++ /dev/null
@@ -1,18 +0,0 @@
-/* Copyright 2015, 2016 Ethcore (UK) Ltd.
-/* This file is part of Parity.
-/*
-/* Parity is free software: you can redistribute it and/or modify
-/* it under the terms of the GNU General Public License as published by
-/* the Free Software Foundation, either version 3 of the License, or
-/* (at your option) any later version.
-/*
-/* Parity is distributed in the hope that it will be useful,
-/* but WITHOUT ANY WARRANTY; without even the implied warranty of
-/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-/* GNU General Public License for more details.
-/*
-/* You should have received a copy of the GNU General Public License
-/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-*/
-.contracts {
-}
diff --git a/js/src/views/Contracts/contracts.js b/js/src/views/Contracts/contracts.js
index d97d88b09..b84705b32 100644
--- a/js/src/views/Contracts/contracts.js
+++ b/js/src/views/Contracts/contracts.js
@@ -28,8 +28,6 @@ import { setVisibleAccounts } from '~/redux/providers/personalActions';
 
 import List from '../Accounts/List';
 
-import styles from './contracts.css';
-
 class Contracts extends Component {
   static contextTypes = {
     api: PropTypes.object.isRequired
@@ -80,7 +78,7 @@ class Contracts extends Component {
     const { searchValues, sortOrder } = this.state;
 
     return (
-      <div className={ styles.contracts }>
+      <div>
         { this.renderActionbar() }
         { this.renderAddContract() }
         { this.renderAddContract() }
@@ -159,7 +157,6 @@ class Contracts extends Component {
 
     return (
       <Actionbar
-        className={ styles.toolbar }
         title='Contracts'
         buttons={ buttons } />
     );
diff --git a/js/src/views/Settings/settings.css b/js/src/views/Settings/settings.css
index 91138db68..1eab3aac3 100644
--- a/js/src/views/Settings/settings.css
+++ b/js/src/views/Settings/settings.css
@@ -15,9 +15,6 @@
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-.layout {
-}
-
 .menu {
   display: inline-block;
 }
@@ -35,31 +32,24 @@
   padding: 16px 2em !important;
   line-height: 24px !important;
   width: auto !important;
-}
 
-.tabactive {
-}
+  &>div {
+    height: 24px !important;
 
-.tab>div,
-.tabactive>div {
-  height: 24px !important;
-}
+    &>div {
+      display: inline-block !important;
+    }
+  }
 
-.tab>div>div,
-.tabactive>div>div {
-  display: inline-block !important;
-}
+  svg {
+    margin-right: 0.5em;
+    margin-bottom: 0 !important;
+  }
 
-.tab svg,
-.tabactive svg {
-  margin-right: 0.5em;
-  margin-bottom: 0 !important;
-}
-
-.tab .menu,
-.tabactive .menu {
-  vertical-align: top;
-  display: inline-block;
+  .menu {
+    vertical-align: top;
+    display: inline-block;
+  }
 }
 
 .imageIcon {
@@ -68,6 +58,8 @@
   opacity: 0.5;
 }
 
-.tabactive .imageIcon {
-  opacity: 1;
+.tabactive {
+  .imageIcon {
+    opacity: 1;
+  }
 }
diff --git a/js/src/views/Settings/settings.js b/js/src/views/Settings/settings.js
index 54b4fa6dd..a6c455dad 100644
--- a/js/src/views/Settings/settings.js
+++ b/js/src/views/Settings/settings.js
@@ -45,7 +45,7 @@ export default class Settings extends Component {
     }
 
     return (
-      <div className={ styles.layout }>
+      <div>
         <Actionbar title='settings' className={ styles.bar }>
           <Tabs className={ styles.tabs } value={ hash }>
             { this.renderTab(hash, 'views', <ImageRemoveRedEye />) }
diff --git a/js/src/views/Signer/components/Account/AccountLink/AccountLink.js b/js/src/views/Signer/components/Account/AccountLink/AccountLink.js
index 97ff35ce9..f42675474 100644
--- a/js/src/views/Signer/components/Account/AccountLink/AccountLink.js
+++ b/js/src/views/Signer/components/Account/AccountLink/AccountLink.js
@@ -16,7 +16,7 @@
 
 import React, { Component, PropTypes } from 'react';
 
-import { addressLink } from '../../../../../3rdparty/etherscan/links';
+import { addressLink } from '~/3rdparty/etherscan/links';
 import styles from './AccountLink.css';
 
 export default class AccountLink extends Component {
diff --git a/js/src/views/Signer/components/TxHashLink/TxHashLink.js b/js/src/views/Signer/components/TxHashLink/TxHashLink.js
index 5fbd5695e..bce30eded 100644
--- a/js/src/views/Signer/components/TxHashLink/TxHashLink.js
+++ b/js/src/views/Signer/components/TxHashLink/TxHashLink.js
@@ -16,7 +16,7 @@
 
 import React, { Component, PropTypes } from 'react';
 
-import { txLink } from '../../../../3rdparty/etherscan/links';
+import { txLink } from '~/3rdparty/etherscan/links';
 
 export default class TxHashLink extends Component {
 
diff --git a/js/src/views/Signer/containers/Embedded/embedded.css b/js/src/views/Signer/containers/Embedded/embedded.css
index 94e0f3933..ffc6a209f 100644
--- a/js/src/views/Signer/containers/Embedded/embedded.css
+++ b/js/src/views/Signer/containers/Embedded/embedded.css
@@ -23,9 +23,6 @@
   width: $embedWidth;
 }
 
-.pending {
-}
-
 .none {
   color: #aaa;
 }
diff --git a/js/src/views/Signer/containers/Embedded/embedded.js b/js/src/views/Signer/containers/Embedded/embedded.js
index 57639ea11..4629a6522 100644
--- a/js/src/views/Signer/containers/Embedded/embedded.js
+++ b/js/src/views/Signer/containers/Embedded/embedded.js
@@ -71,7 +71,7 @@ class Embedded extends Component {
     const items = pending.sort(this._sortRequests).map(this.renderPending);
 
     return (
-      <div className={ styles.pending }>
+      <div>
         { items }
       </div>
     );
diff --git a/js/src/views/Signer/containers/RequestsPage/RequestsPage.css b/js/src/views/Signer/containers/RequestsPage/RequestsPage.css
index 3701c3097..662c45817 100644
--- a/js/src/views/Signer/containers/RequestsPage/RequestsPage.css
+++ b/js/src/views/Signer/containers/RequestsPage/RequestsPage.css
@@ -15,12 +15,6 @@
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-.request {
-}
-
 .noRequestsMsg {
   color: #aaa;
 }
-
-.items {
-}
diff --git a/js/src/views/Signer/containers/RequestsPage/RequestsPage.js b/js/src/views/Signer/containers/RequestsPage/RequestsPage.js
index ecb2ccd43..f3cd5a267 100644
--- a/js/src/views/Signer/containers/RequestsPage/RequestsPage.js
+++ b/js/src/views/Signer/containers/RequestsPage/RequestsPage.js
@@ -98,9 +98,7 @@ class RequestsPage extends Component {
 
     return (
       <Container title='Pending Requests'>
-        <div className={ styles.items }>
-          { items }
-        </div>
+        { items }
       </Container>
     );
   }
@@ -111,7 +109,6 @@ class RequestsPage extends Component {
 
     return (
       <RequestPending
-        className={ styles.request }
         onConfirm={ actions.startConfirmRequest }
         onReject={ actions.startRejectRequest }
         isSending={ isSending || false }
diff --git a/js/src/views/Signer/signer.js b/js/src/views/Signer/signer.js
index 536cf1d37..6d68c1dc0 100644
--- a/js/src/views/Signer/signer.js
+++ b/js/src/views/Signer/signer.js
@@ -19,12 +19,10 @@ import React, { Component } from 'react';
 import { Actionbar } from '~/ui';
 import RequestsPage from './containers/RequestsPage';
 
-import styles from './signer.css';
-
 export default class Signer extends Component {
   render () {
     return (
-      <div className={ styles.signer }>
+      <div>
         <Actionbar
           title='Trusted Signer' />
         <RequestsPage />
diff --git a/js/src/views/Status/components-compositors/Animated/AnimateChildren.css b/js/src/views/Status/components-compositors/Animated/AnimateChildren.css
deleted file mode 100644
index 5d7b5b39a..000000000
--- a/js/src/views/Status/components-compositors/Animated/AnimateChildren.css
+++ /dev/null
@@ -1,55 +0,0 @@
-/* Copyright 2015, 2016 Ethcore (UK) Ltd.
-/* This file is part of Parity.
-/*
-/* Parity is free software: you can redistribute it and/or modify
-/* it under the terms of the GNU General Public License as published by
-/* the Free Software Foundation, either version 3 of the License, or
-/* (at your option) any later version.
-/*
-/* Parity is distributed in the hope that it will be useful,
-/* but WITHOUT ANY WARRANTY; without even the implied warranty of
-/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-/* GNU General Public License for more details.
-/*
-/* You should have received a copy of the GNU General Public License
-/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-*/
-/* todo [adgo] - make local */
-:global .transition-appear {
-  opacity: 0.01;
-}
-
-:global .transition-appear.transition-appear-active {
-  opacity: 1;
-  transition: opacity .3s ease-in-out;
-}
-
-:global .transition-enter {
-  opacity: 0.01;
-}
-
-:global .transition-enter.transition-enter-active {
-  opacity: 1;
-  transition: opacity .3s ease-in-out;
-}
-
-:global .transition-leave {
-  opacity: 1;
-}
-
-:global .transition-leave.transition-leave-active {
-  opacity: 0.01;
-  transition: opacity .3s ease-in-out;
-}
-
-:global .absoluteAnimationContainer {
-  position: relative;
-}
-
-:global .absoluteAnimationContainer > .transition-leave {
-  position: absolute;
-  top: 0;
-  left: 0;
-  right: 0;
-  width: 100%;
-}
diff --git a/js/src/views/Status/components-compositors/Animated/Animated.js b/js/src/views/Status/components-compositors/Animated/Animated.js
deleted file mode 100644
index c22344c01..000000000
--- a/js/src/views/Status/components-compositors/Animated/Animated.js
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright 2015, 2016 Ethcore (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-
-import React, { Component } from 'react';
-import AnimateChildren from './children';
-
-export default Wrapped => class Animated extends Component {
-  render () {
-    return (
-      <AnimateChildren>
-        <Wrapped { ...this.props } />
-      </AnimateChildren>
-    );
-  }
-};
diff --git a/js/src/views/Status/components-compositors/Animated/children.js b/js/src/views/Status/components-compositors/Animated/children.js
deleted file mode 100644
index be7f910bf..000000000
--- a/js/src/views/Status/components-compositors/Animated/children.js
+++ /dev/null
@@ -1,63 +0,0 @@
-// Copyright 2015, 2016 Ethcore (UK) Ltd.
-// This file is part of Parity.
-
-// Parity is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-
-// Parity is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-
-// You should have received a copy of the GNU General Public License
-// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-
-import React, { Component, PropTypes } from 'react';
-import { isReactComponent } from '../../util/react';
-import ReactCSSTransitionGroup from 'react-addons-css-transition-group';
-import './AnimateChildren.css';
-
-export default class AnimateChildren extends Component {
-  render () {
-    const className = this.props.absolute ? 'absoluteAnimationContainer' : '';
-    return (
-      <ReactCSSTransitionGroup
-        component='div'
-        className={ className }
-        transitionName='transition'
-        transitionAppear
-        transitionAppearTimeout={ 0 }
-        transitionLeaveTimeout={ 0 }
-        transitionEnterTimeout={ 0 }
-        >
-        { this.renderChildren() }
-      </ReactCSSTransitionGroup>
-    );
-  }
-
-  renderChildren () {
-    const { children, isView } = this.props;
-
-    if (isView) {
-      return React.cloneElement(this.props.children, {
-        key: this.props.pathname
-      });
-    }
-
-    if (isReactComponent(children)) {
-      return React.cloneElement(this.props.children, { ...this.props });
-    }
-
-    return children;
-  }
-
-  static propTypes = {
-    children: PropTypes.any.isRequired,
-    pathname: PropTypes.string,
-    isView: PropTypes.bool,
-    absolute: PropTypes.bool
-  }
-
-}
diff --git a/js/src/views/Status/components/Calls/Calls.js b/js/src/views/Status/components/Calls/Calls.js
index 7734104ec..1115ec632 100644
--- a/js/src/views/Status/components/Calls/Calls.js
+++ b/js/src/views/Status/components/Calls/Calls.js
@@ -15,7 +15,6 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 import React, { Component, PropTypes } from 'react';
-import AnimateChildren from '../../components-compositors/Animated/children';
 import Call from '../Call';
 import CallsToolbar from '../CallsToolbar';
 import styles from './Calls.css';
@@ -73,13 +72,11 @@ export default class Calls extends Component {
     }
 
     return (
-      <AnimateChildren>
-        <div { ...this._test('empty-wrapper') }>
-          <h3 className={ styles.historyInfo } { ...this._test('empty') }>
-            Fire up some calls and the results will be here.
-          </h3>
-        </div>
-      </AnimateChildren>
+      <div { ...this._test('empty-wrapper') }>
+        <h3 className={ styles.historyInfo } { ...this._test('empty') }>
+          Fire up some calls and the results will be here.
+        </h3>
+      </div>
     );
   }
 
@@ -90,17 +87,13 @@ export default class Calls extends Component {
       return;
     }
 
-    return (
-      <AnimateChildren>
-        { calls.map((call, idx) => (
-          <Call
-            key={ calls.length - idx }
-            call={ call }
-            setActiveCall={ this.setActiveCall }
-          />
-        )) }
-      </AnimateChildren>
-    );
+    return calls.map((call, idx) => (
+      <Call
+        key={ calls.length - idx }
+        call={ call }
+        setActiveCall={ this.setActiveCall }
+      />
+    ));
   }
 
   clearActiveCall = () => {
diff --git a/js/src/views/Status/containers/StatusPage/StatusPage.js b/js/src/views/Status/containers/StatusPage/StatusPage.js
index 286e2c20e..c7ab56c5e 100644
--- a/js/src/views/Status/containers/StatusPage/StatusPage.js
+++ b/js/src/views/Status/containers/StatusPage/StatusPage.js
@@ -23,8 +23,6 @@ import { clearStatusLogs, toggleStatusLogs, toggleStatusRefresh } from '~/redux/
 import Debug from '../../components/Debug';
 import Status from '../../components/Status';
 
-import styles from './statusPage.css';
-
 class StatusPage extends Component {
   static propTypes = {
     nodeStatus: PropTypes.object.isRequired,
@@ -41,7 +39,7 @@ class StatusPage extends Component {
 
   render () {
     return (
-      <div className={ styles.body }>
+      <div>
         <Status { ...this.props } />
         <Debug { ...this.props } />
       </div>
diff --git a/js/src/views/Status/containers/StatusPage/statusPage.css b/js/src/views/Status/containers/StatusPage/statusPage.css
deleted file mode 100644
index 850ee0856..000000000
--- a/js/src/views/Status/containers/StatusPage/statusPage.css
+++ /dev/null
@@ -1,18 +0,0 @@
-/* Copyright 2015, 2016 Ethcore (UK) Ltd.
-/* This file is part of Parity.
-/*
-/* Parity is free software: you can redistribute it and/or modify
-/* it under the terms of the GNU General Public License as published by
-/* the Free Software Foundation, either version 3 of the License, or
-/* (at your option) any later version.
-/*
-/* Parity is distributed in the hope that it will be useful,
-/* but WITHOUT ANY WARRANTY; without even the implied warranty of
-/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-/* GNU General Public License for more details.
-/*
-/* You should have received a copy of the GNU General Public License
-/* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
-*/
-.body {
-}
diff --git a/js/webpack/shared.js b/js/webpack/shared.js
index 8887c41fb..8b6807b2a 100644
--- a/js/webpack/shared.js
+++ b/js/webpack/shared.js
@@ -23,6 +23,7 @@ const postcssImport = require('postcss-import');
 const postcssNested = require('postcss-nested');
 const postcssVars = require('postcss-simple-vars');
 const rucksack = require('rucksack-css');
+const CircularDependencyPlugin = require('circular-dependency-plugin');
 
 const ENV = process.env.NODE_ENV || 'development';
 const isProd = ENV === 'production';
@@ -102,7 +103,12 @@ function getPlugins (_isProd = isProd) {
       }
     }),
 
-    new webpack.optimize.OccurrenceOrderPlugin(!_isProd)
+    new webpack.optimize.OccurrenceOrderPlugin(!_isProd),
+
+    new CircularDependencyPlugin({
+      exclude: /node_modules/,
+      failOnError: true
+    })
   ];
 
   if (_isProd) {