Use import type (#406)

packages/example-vue/src/index.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/example-vue authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Prefix } from '@polkadot/util-crypto/address/types';
+import type { Prefix } from '@polkadot/util-crypto/address/types';
 
 import Vue, { VNode } from 'vue';
 import keyring from '@polkadot/ui-keyring';

packages/ledger-transports/src/browser.ts

@@ -1,9 +1,9 @@
 // Copyright 2017-2020 @polkadot/ledger authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { TransportDef } from './types';
+import type Transport from '@ledgerhq/hw-transport';
+import type { TransportDef } from './types';
 
-import Transport from '@ledgerhq/hw-transport';
 import LedgerWebUSB from '@ledgerhq/hw-transport-webusb';
 
 const transports: TransportDef[] = [

packages/ledger-transports/src/node.ts

@@ -1,9 +1,9 @@
 // Copyright 2017-2020 @polkadot/ledger authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { TransportDef } from './types';
+import type Transport from '@ledgerhq/hw-transport';
+import type { TransportDef } from './types';
 
-import Transport from '@ledgerhq/hw-transport';
 import LedgerHid from '@ledgerhq/hw-transport-node-hid-singleton';
 
 const transports: TransportDef[] = [

packages/ledger-transports/src/react-native.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ledger authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { TransportDef } from './types';
+import type { TransportDef } from './types';
 
 const transports: TransportDef[] = [];
 

packages/ledger/src/index.ts

@@ -1,8 +1,8 @@
 // Copyright 2017-2020 @polkadot/ledger authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import Transport from '@ledgerhq/hw-transport';
+import type Transport from '@ledgerhq/hw-transport';
-import { AccountOptions, LedgerAddress, LedgerSignature, LedgerTypes, LedgerVersion } from './types';
+import type { AccountOptions, LedgerAddress, LedgerSignature, LedgerTypes, LedgerVersion } from './types';
 
 import { ResponseBase, SubstrateApp, newKusamaApp, newPolkadotApp } from '@zondax/ledger-polkadot';
 import transports from '@polkadot/ledger-transports';

packages/react-identicon/src/Identicon.tsx

@@ -1,8 +1,8 @@
 // Copyright 2017-2020 @polkadot/react-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Prefix } from '@polkadot/util-crypto/address/types';
+import type { Prefix } from '@polkadot/util-crypto/address/types';
-import { IdentityProps as Props, Props as ComponentProps } from './types';
+import type { IdentityProps as Props, Props as ComponentProps } from './types';
 
 import React from 'react';
 import CopyToClipboard from 'react-copy-to-clipboard';

packages/react-identicon/src/icons/Beachball.tsx

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/react-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Props } from '../types';
+import type { Props } from '../types';
 
 import React, { useCallback } from 'react';
 import { beachballIcon } from '@polkadot/ui-shared';

packages/react-identicon/src/icons/Empty.tsx

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/react-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Props } from '../types';
+import type { Props } from '../types';
 
 import React from 'react';
 

packages/react-identicon/src/icons/Ethereum.tsx

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/react-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Props } from '../types';
+import type { Props } from '../types';
 
 import makeBlockie from 'ethereum-blockies-base64';
 import React, { useMemo } from 'react';

packages/react-identicon/src/icons/Jdenticon.tsx

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/react-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Props } from '../types';
+import type { Props } from '../types';
 
 import React from 'react';
 import jdenticon from 'jdenticon';

packages/react-identicon/src/icons/Polkadot.tsx

@@ -15,8 +15,8 @@
 //   - Move constants to file-level
 //   - Overall it is now just a static component, expecting an address as an input value
 
-import { Circle } from '@polkadot/ui-shared/icons/types';
+import type { Circle } from '@polkadot/ui-shared/icons/types';
-import { Props } from '../types';
+import type { Props } from '../types';
 
 import React from 'react';
 import { polkadotIcon } from '@polkadot/ui-shared';

packages/react-identicon/src/types.ts

@@ -1,7 +1,8 @@
 // Copyright 2018-2020 @polkadot/react-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Prefix } from '@polkadot/util-crypto/address/types';
+import type { Prefix } from '@polkadot/util-crypto/address/types';
+
 import React from 'react';
 
 export interface BaseProps {

packages/reactnative-identicon/src/Identicon.tsx

@@ -1,8 +1,8 @@
 // Copyright 2017-2020 @polkadot/reactnative-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Prefix } from '@polkadot/util-crypto/address/types';
+import type { Prefix } from '@polkadot/util-crypto/address/types';
-import { Props as ComponentProps } from './types';
+import type { Props as ComponentProps } from './types';
 
 import React from 'react';
 import { isHex, isU8a, u8aToHex } from '@polkadot/util';

packages/reactnative-identicon/src/icons/Empty.tsx

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/reactnative-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Props } from '../types';
+import type { Props } from '../types';
 
 import React from 'react';
 import { View } from 'react-native';

packages/reactnative-identicon/src/icons/Polkadot.tsx

@@ -1,8 +1,8 @@
 // Copyright 2018-2020 @polkadot/reactnative-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Circle as CircleType } from '@polkadot/ui-shared/icons/types';
+import type { Circle as CircleType } from '@polkadot/ui-shared/icons/types';
-import { Props } from '../types';
+import type { Props } from '../types';
 
 import React from 'react';
 import { View } from 'react-native';

packages/ui-keyring/src/Base.ts

@@ -1,10 +1,10 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { KeyringInstance, KeyringPair } from '@polkadot/keyring/types';
+import type { KeyringInstance, KeyringPair } from '@polkadot/keyring/types';
-import { Prefix } from '@polkadot/util-crypto/address/types';
+import type { Prefix } from '@polkadot/util-crypto/address/types';
-import { AddressSubject } from './observable/types';
+import type { AddressSubject } from './observable/types';
-import { KeyringOptions, KeyringStore } from './types';
+import type { KeyringOptions, KeyringStore } from './types';
 
 import { createTestKeyring } from '@polkadot/keyring/testing';
 import { isBoolean, isString } from '@polkadot/util';

packages/ui-keyring/src/Keyring.ts

@@ -1,10 +1,10 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { KeyringPair, KeyringPair$Meta, KeyringPair$Json } from '@polkadot/keyring/types';
+import type { KeyringPair, KeyringPair$Meta, KeyringPair$Json } from '@polkadot/keyring/types';
-import { KeypairType } from '@polkadot/util-crypto/types';
+import type { KeypairType } from '@polkadot/util-crypto/types';
-import { AddressSubject, SingleAddress } from './observable/types';
+import type { AddressSubject, SingleAddress } from './observable/types';
-import { CreateResult, KeyringAddress, KeyringAddressType, KeyringItemType, KeyringJson, KeyringJson$Meta, KeyringOptions, KeyringStruct } from './types';
+import type { CreateResult, KeyringAddress, KeyringAddressType, KeyringItemType, KeyringJson, KeyringJson$Meta, KeyringOptions, KeyringStruct } from './types';
 
 import BN from 'bn.js';
 import { createPair } from '@polkadot/keyring/pair';

packages/ui-keyring/src/observable/genericSubject.ts

@@ -1,8 +1,8 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { SubjectInfo, AddressSubject, SingleAddress } from './types';
+import type { SubjectInfo, AddressSubject, SingleAddress } from './types';
-import { KeyringJson, KeyringStore } from '../types';
+import type { KeyringJson, KeyringStore } from '../types';
 
 import { BehaviorSubject } from 'rxjs';
 

packages/ui-keyring/src/observable/index.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { SubjectInfo } from './types';
+import type { SubjectInfo } from './types';
 
 import { combineLatest } from 'rxjs';
 import { map } from 'rxjs/operators';

packages/ui-keyring/src/observable/types.ts

@@ -1,9 +1,9 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { BehaviorSubject } from 'rxjs';
+import type { BehaviorSubject } from 'rxjs';
-import { KeyringSectionOption } from '../options/types';
+import type { KeyringSectionOption } from '../options/types';
-import { KeyringJson, KeyringStore } from '../types';
+import type { KeyringJson, KeyringStore } from '../types';
 
 export interface SingleAddress {
   json: KeyringJson;

packages/ui-keyring/src/options/index.spec.ts

@@ -1,7 +1,8 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { KeyringStruct } from '../types';
+import type { KeyringStruct } from '../types';
+
 import { KeyringOption } from '.';
 
 const keyringOption = new KeyringOption();

packages/ui-keyring/src/options/index.ts

@@ -1,9 +1,9 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { KeyringStruct } from '../types';
+import type { KeyringStruct } from '../types';
-import { SingleAddress } from '../observable/types';
+import type { SingleAddress } from '../observable/types';
-import { KeyringOptions, KeyringOptionInstance, KeyringSectionOption, KeyringSectionOptions } from './types';
+import type { KeyringOptions, KeyringOptionInstance, KeyringSectionOption, KeyringSectionOptions } from './types';
 
 import { BehaviorSubject } from 'rxjs';
 import { assert } from '@polkadot/util';

packages/ui-keyring/src/options/item.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { KeyringSectionOption } from './types';
+import type { KeyringSectionOption } from './types';
 
 import { isUndefined } from '@polkadot/util';
 

packages/ui-keyring/src/options/types.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { KeyringItemType, KeyringStruct } from '../types';
+import type { KeyringItemType, KeyringStruct } from '../types';
 
 export interface KeyringSectionOption {
   key: string | null;

packages/ui-keyring/src/stores/Browser.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { KeyringStore, KeyringJson } from '../types';
+import type { KeyringStore, KeyringJson } from '../types';
 
 import store from 'store';
 

packages/ui-keyring/src/stores/File.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { KeyringStore, KeyringJson } from '../types';
+import type { KeyringStore, KeyringJson } from '../types';
 
 import fs from 'fs';
 import mkdirp from 'mkdirp';

packages/ui-keyring/src/types.ts

@@ -1,10 +1,10 @@
 // Copyright 2017-2020 @polkadot/ui-keyring authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Hash } from '@polkadot/types/interfaces';
+import type { Hash } from '@polkadot/types/interfaces';
-import { KeyringInstance as BaseKeyringInstance, KeyringPair, KeyringPair$Meta, KeyringPair$Json, KeyringOptions as KeyringOptionsBase } from '@polkadot/keyring/types';
+import type { KeyringInstance as BaseKeyringInstance, KeyringPair, KeyringPair$Meta, KeyringPair$Json, KeyringOptions as KeyringOptionsBase } from '@polkadot/keyring/types';
-import { KeypairType } from '@polkadot/util-crypto/types';
+import type { KeypairType } from '@polkadot/util-crypto/types';
-import { AddressSubject, SingleAddress } from './observable/types';
+import type { AddressSubject, SingleAddress } from './observable/types';
 
 export interface ContractMeta {
   abi: string;

packages/ui-settings/src/Settings.ts

@@ -1,12 +1,13 @@
 // Copyright 2017-2020 @polkadot/ui-settings authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
+import type { Option, SettingsStruct } from './types';
+
 import EventEmitter from 'eventemitter3';
 import store from 'store';
 import { isUndefined } from '@polkadot/util';
 
 import { CAMERA_DEFAULT, CAMERA, CRYPTOS, CRYPTOS_ETH, ENDPOINT_DEFAULT, ENDPOINTS, ICON_DEFAULT, ICONS, LANGUAGE_DEFAULT, LEDGER_CONN, LEDGER_CONN_DEFAULT, LOCKING_DEFAULT, LOCKING, PREFIX_DEFAULT, PREFIXES, UIMODE_DEFAULT, UIMODES, UITHEME_DEFAULT, UITHEMES } from './defaults';
-import { Option, SettingsStruct } from './types';
 
 type ChangeCallback = (settings: SettingsStruct) => void;
 type OnTypes = 'change';

packages/ui-settings/src/defaults/crypto.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-settings authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Option } from '../types';
+import type { Option } from '../types';
 
 export const CRYPTOS: Option[] = [
   {

packages/ui-settings/src/defaults/endpoints.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-settings authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Option } from '../types';
+import type { Option } from '../types';
 
 export const ENDPOINTS: Option[] = [{
   info: 'local',

packages/ui-settings/src/defaults/index.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-settings authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Option } from '../types';
+import type { Option } from '../types';
 
 import { CRYPTOS, CRYPTOS_ETH } from './crypto';
 import { ENDPOINTS, ENDPOINT_DEFAULT } from './endpoints';

packages/ui-settings/src/defaults/ledger.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-settings authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Option } from '../types';
+import type { Option } from '../types';
 
 export const LEDGER_CONN_DEFAULT = 'none';
 

packages/ui-settings/src/defaults/ss58.ts

@@ -1,7 +1,8 @@
 // Copyright 2017-2020 @polkadot/ui-settings authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Option } from '../types';
+import type { Option } from '../types';
+
 import { available } from '@polkadot/networks';
 
 export const PREFIX_DEFAULT = -1;

packages/ui-settings/src/defaults/ui.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-settings authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Option } from '../types';
+import type { Option } from '../types';
 
 import { isPolkadot } from './type';
 

packages/ui-shared/src/icons/beachball/colors.spec.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-shared authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { ColorGen } from './types';
+import type { ColorGen } from './types';
 
 import newSeeder from './seeder';
 import newColors from './colors';

packages/ui-shared/src/icons/beachball/colors.ts

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 // Copyright 2016 Dan Finlay
 
-import { ColorGen, Seeder } from './types';
+import type { ColorGen, Seeder } from './types';
 
 import Color from 'color';
 

packages/ui-shared/src/icons/beachball/index.ts

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 // Copyright 2016 Dan Finlay
 
-import { Options } from '../types';
+import type { Options } from '../types';
 
 import colors from './colors';
 import newContainer from './container';

packages/ui-shared/src/icons/beachball/seeder.spec.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-shared authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Seeder } from './types';
+import type { Seeder } from './types';
 
 import newSeeder from './seeder';
 

packages/ui-shared/src/icons/beachball/seeder.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/ui-shared authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Seeder } from './types';
+import type { Seeder } from './types';
 
 import { isU8a, stringToU8a } from '@polkadot/util';
 

packages/ui-shared/src/icons/beachball/shape/circle.ts

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 // Copyright 2016 Dan Finlay
 
-import { Seeder } from '../types';
+import type { Seeder } from '../types';
 
 import newCircle from '../svg/circle';
 import { SHAPE_COUNT } from '../defaults';

packages/ui-shared/src/icons/beachball/shape/square.ts

@@ -2,7 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 // Copyright 2016 Dan Finlay
 
-import { Seeder } from '../types';
+import type { Seeder } from '../types';
 
 import newRect from '../svg/rect';
 import { SHAPE_COUNT } from '../defaults';

packages/ui-shared/src/icons/polkadot.ts

@@ -6,7 +6,7 @@
 //
 // https://github.com/paritytech/oo7/blob/251ba2b7c45503b68eab4320c270b5afa9bccb60/packages/polkadot-identicon/src/index.jsx
 
-import { Circle, Options } from './types';
+import type { Circle, Options } from './types';
 
 import { blake2AsU8a, decodeAddress } from '@polkadot/util-crypto';
 

packages/vue-identicon/src/Identicon.ts

@@ -1,7 +1,7 @@
 // Copyright 2017-2020 @polkadot/vue-identicon authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { Prefix } from '@polkadot/util-crypto/address/types';
+import type { Prefix } from '@polkadot/util-crypto/address/types';
 
 import Vue from 'vue';
 import { isHex, isU8a, u8aToHex } from '@polkadot/util';