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Add derive functions (#540)

Browse Source 
* Make types work

* Add test for derive

* Skip e2e

* Change description

* Add some comments

* Add caching

* Integrate cache

* Add tests

* Add test

* Fix types in tests

* Add e2e tests

* Add comments

* Fix lint

* Bump versions

* Remove useless stuff

* Address grumbles
This commit is contained in:
Amaury Martiny
2019-01-09 10:59:56 +01:00
committed by Jaco Greeff
parent 22123f9491
commit f6c93e48b7
17 changed files with 589 additions and 4 deletions
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4
jest.config.js
View File

@@ -2,7 +2,8 @@ const config = require('@polkadot/dev/config/jest');
module.exports = Object.assign({}, config, {
moduleNameMapper: {
'@polkadot/api$': '<rootDir>/packages/api/src/$1',
'@polkadot/api-derive(.*)$': '<rootDir>/packages/api-derive/src/$1',
'@polkadot/api(.*)$': '<rootDir>/packages/api/src/$1',
'@polkadot/rpc-(core|provider|rx)(.*)$': '<rootDir>/packages/rpc-$1/src/$2',
'@polkadot/extrinsics(.*)$': '<rootDir>/packages/type-extrinsics/src/$1',
'@polkadot/jsonrpc(.*)$': '<rootDir>/packages/type-jsonrpc/src/$1',
@@ -11,6 +12,7 @@ module.exports = Object.assign({}, config, {
},
modulePathIgnorePatterns: [
'<rootDir>/packages/api/build',
'<rootDir>/packages/api-derive/build',
'<rootDir>/packages/rpc-core/build',
'<rootDir>/packages/rpc-provider/build',
'<rootDir>/packages/rpc-rx/build',

201
packages/api-derive/LICENSE Normal file
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@@ -0,0 +1,201 @@
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3
packages/api-derive/README.md Normal file
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@@ -0,0 +1,3 @@
# @polkadot/api-derive
Common functions used across Polkadot, derived from RPC calls and storage queries.

41
packages/api-derive/package.json Normal file
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@@ -0,0 +1,41 @@
{
"name": "@polkadot/api-derive",
"version": "0.38.1",
"description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
"main": "index.js",
"keywords": [
"Polkadot",
"Promise",
"RxJs"
],
"author": "Jaco Greeff <jacogr@gmail.com>",
"maintainers": [
"Jaco Greeff <jacogr@gmail.com>"
],
"contributors": [],
"license": "Apache-2.0",
"engines": {
"node": ">=8.0"
},
"publishConfig": {
"access": "public",
"registry": "https://registry.npmjs.org"
},
"repository": {
"type": "git",
"url": "git+https://github.com/polkadot-js/api.git"
},
"bugs": {
"url": "https://github.com/polkadot-js/api/issues"
},
"homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
"dependencies": {
"@babel/runtime": "^7.2.0",
"@polkadot/api": "^0.38.1",
"@polkadot/types": "^0.38.1",
"@types/memoizee": "^0.4.2",
"@types/rx": "^4.1.1",
"memoizee": "^0.4.14",
"rxjs": "^6.3.3"
}
}

30
packages/api-derive/src/cache.spec.ts Normal file
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@@ -0,0 +1,30 @@
// Copyright 2017-2019 @polkadot/ui-react-rx authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
import ApiRx from '@polkadot/api/rx';
import { cache } from './cache';
describe('cache', () => {
const f = cache((api: ApiRx) => (a: number, b: number) => [api, a, b]);
const api = {} as ApiRx;
it('should hit cache when all arguments are the same', () => {
const first = f(api)(2, 3);
const second = f(api)(2, 3);
expect(first).toBe(second);
});
it('should not hit cache when some arguments are not the same', () => {
const first = f(api)(2, 3);
const second1 = f(api)(5, 3);
const second2 = f(api)(2, 5);
const second3 = f({} as ApiRx)(2, 3);
expect(first).not.toBe(second1);
expect(first).not.toBe(second2);
expect(first).not.toBe(second3);
});
});

30
packages/api-derive/src/cache.ts Normal file
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@@ -0,0 +1,30 @@
// Copyright 2017-2019 @polkadot/ui-react-rx authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
import memoizee from 'memoizee';
import ApiRx from '@polkadot/api/rx';
/**
* Create memoization for a 2-currified function.
*
* @param fn - The function to memoize.
* @param map - The Map used to cache function returns.
* @example
* ```javascript
* const f = (api: ApiRx) => (b: number) => a * b;
* const cached = cache(f);
* f(api)(1, 2);
* f(api)(1); // Cache not hit
* f({})(1, 2); // Cache not hit
* f(api)(1, 2); // Cache hit
* ```
*/
export const cache = (fn: Function, map = new WeakMap()) => (api: ApiRx) => {
if (!map.has(api)) {
const innerFn = fn(api);
map.set(api, memoizee(innerFn));
}
return map.get(api);
};

20
packages/api-derive/src/chain/bestNumber.ts Normal file
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@@ -0,0 +1,20 @@
// Copyright 2017-2019 @polkadot/ui-react-rx authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
import { Observable } from 'rxjs';
import { filter, map } from 'rxjs/operators';
import ApiRx from '@polkadot/api/rx';
import { BlockNumber, Header } from '@polkadot/types/index';
/**
* Get the latest block number.
*/
export function bestNumber (api: ApiRx) {
return (): Observable<BlockNumber> =>
api.rpc.chain.subscribeNewHead()
.pipe(
filter((header: Header) => header && !!header.blockNumber),
map(({ blockNumber }: Header) => blockNumber)
);
}

5
packages/api-derive/src/chain/index.ts Normal file
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@@ -0,0 +1,5 @@
// Copyright 2017-2019 @polkadot/ui-react-rx authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
export * from './bestNumber';

38
packages/api-derive/src/index.spec.ts Normal file
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@@ -0,0 +1,38 @@
// Copyright 2017-2019 @polkadot/ui-react-rx authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
import { Observable } from 'rxjs';
import ApiRx from '@polkadot/api/rx';
import MockProvider from '@polkadot/rpc-provider/mock';
import { Derive } from './index';
const testFunction = (api: ApiRx) => {
return <
Section extends keyof Derive,
Method extends keyof (typeof api.derive[Section])
>(section: Section, method: Method, inputs: any[]) => {
describe(`derive.${section}.${method}`, () => {
it('should return an Observable', () => {
expect((api.derive[section][method] as any)(...inputs) instanceof Observable);
});
it('should be memoized', () => {
const first = (api.derive[section][method] as any)(...inputs);
const second = (api.derive[section][method] as any)(...inputs);
expect(first).toBe(second);
});
});
};
};
describe('derive', () => {
const api = new ApiRx(new MockProvider());
beforeAll((done) => api.isReady.subscribe(() => done()));
testFunction(api)('chain', 'bestNumber', []);
testFunction(api)('session', 'sessionProgress', []);
});

45
packages/api-derive/src/index.ts Normal file
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@@ -0,0 +1,45 @@
// Copyright 2017-2019 @polkadot/ui-react-rx authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
import ApiRx from '@polkadot/api/rx';
import { cache } from './cache';
import * as chain from './chain';
import * as session from './session';
// Put all derived functions in an object, for easier Object.keys()-ing.
const functions = { chain, session };
/**
* T represents the section here (chain, balances...), and P represents
* the function name (bestNumber, sessionProgress...).
*/
type ReturnTypes<T extends Record<keyof T, (...args: any[]) => any>> = {
[P in keyof T]: ReturnType<T[P]>
};
export interface Derive {
chain: ReturnTypes<typeof chain>;
session: ReturnTypes<typeof session>;
}
export default function decorateDerive (api: ApiRx): Derive {
const derive = {} as Derive;
Object.keys(functions).forEach((sectionName: string) => {
const section = functions[sectionName as keyof Derive];
derive[sectionName as keyof Derive] = Object.keys(section).reduce((result, methodName) => {
// Create cache for the section_method function
// @ts-ignore No idea how to make this work...
const cached = cache(section[methodName as keyof section]);
// Add this cached function into the result
// @ts-ignore No idea how to make this work...
result[methodName as keyof section] = cached(api);
return result;
}, {} as ReturnTypes<typeof section>);
});
return derive;
}

5
packages/api-derive/src/session/index.ts Normal file
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@@ -0,0 +1,5 @@
// Copyright 2017-2019 @polkadot/ui-react-rx authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
export * from './sessionProgress';

26
packages/api-derive/src/session/sessionProgress.ts Normal file
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@@ -0,0 +1,26 @@
// Copyright 2017-2019 @polkadot/ui-react-rx authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
import BN from 'bn.js';
import { combineLatest, Observable } from 'rxjs';
import { map } from 'rxjs/operators';
import ApiRx from '@polkadot/api/rx';
import { BlockNumber } from '@polkadot/types/index';
import { bestNumber } from '../chain';
export function sessionProgress (api: ApiRx) {
return (): Observable<BN> =>
combineLatest([
bestNumber(api)(),
api.query.session.sessionLength(),
api.query.session.lastLengthChange()
]).pipe(map(
([bestNumber, sessionLength, lastLengthChange]) =>
(bestNumber as BlockNumber || new BN(0))
.sub(lastLengthChange as BlockNumber || new BN(0))
.add(sessionLength as BlockNumber || new BN(1))
.mod(sessionLength as BlockNumber || new BN(1))
));
}

38
packages/api-derive/test/e2e/derive.spec.ts Normal file
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@@ -0,0 +1,38 @@
// Copyright 2017-2018 @polkadot/api-derive authors & contributors
// This software may be modified and distributed under the terms
// of the Apache-2.0 license. See the LICENSE file for details.
import BN from 'bn.js';
import ApiRx from '@polkadot/api/rx';
import { BlockNumber } from '@polkadot/types/index';
describe.skip('derive e2e', () => {
let api: ApiRx;
beforeAll(() => {
jest.setTimeout(30000);
});
beforeEach(async () => {
api = await ApiRx.create().toPromise();
});
it('derive.chain.bestNumber', async (done) => {
api.derive.chain.bestNumber().subscribe((blockNumber: BlockNumber) => {
expect(blockNumber instanceof BlockNumber).toBe(true);
expect(blockNumber.gten(0)).toBe(true);
done();
});
});
it('derive.session.sessionProgress', async (done) => {
api.derive.session.sessionProgress().subscribe((progress: BN) => {
expect(progress instanceof BN).toBe(true);
done();
});
});
afterAll(() => {
jest.setTimeout(5000);
});
});

7
packages/api/src/rx/index.ts
View File

@@ -8,6 +8,7 @@ import { ApiRxInterface, QueryableStorageFunction, QueryableModuleStorage, Query
import { Observable, from, of } from 'rxjs';
import { catchError, map } from 'rxjs/operators';
import decorateDerive, { Derive } from '@polkadot/api-derive/index';
import Rpc from '@polkadot/rpc-core/index';
import RpcRx from '@polkadot/rpc-rx/index';
import { Storage } from '@polkadot/storage/types';
@@ -118,6 +119,7 @@ import SubmittableExtrinsic from './SubmittableExtrinsic';
* ```
*/
export default class ApiRx extends ApiBase<RpcRx, QueryableStorage, SubmittableExtrinsics> implements ApiRxInterface {
protected _derive: Derive;
private _isReady: Observable<ApiRx>;
/**
@@ -165,6 +167,7 @@ export default class ApiRx extends ApiBase<RpcRx, QueryableStorage, SubmittableE
assert(this.hasSubscriptions, 'ApiRx can only be used with a provider supporting subscriptions');
this._derive = decorateDerive(this);
this._isReady = from(
// convinced you can observable from an event, however my mind groks this form better
new Promise((resolveReady) =>
@@ -175,6 +178,10 @@ export default class ApiRx extends ApiBase<RpcRx, QueryableStorage, SubmittableE
);
}
get derive (): Derive {
return this._derive;
}
/**
* @description Observable that carries the connected state for the provider. Results in a boolean flag that is true/false based on the connectivity.
*/

6
packages/rpc-provider/src/mock/index.ts
View File

@@ -11,6 +11,7 @@ import interfaces from '@polkadot/jsonrpc/index';
import testKeyring from '@polkadot/keyring/testing';
import storage from '@polkadot/storage/static';
import { Codec } from '@polkadot/types/types';
import metadata from '@polkadot/types/Metadata/static';
import { Header } from '@polkadot/types/index';
import { bnToU8a, logger, u8aToHex } from '@polkadot/util';
import { randomAsU8a } from '@polkadot/util-crypto';
@@ -41,12 +42,15 @@ export default class Mock implements ProviderInterface {
private emitter = new EventEmitter();
public isUpdating: boolean = true;
private requests: { [index: string]: (...params: any[]) => string } = {
'chain_getBlockHash': (blockNumber: number): string => '0x1234',
'chain_getRuntimeVersion': (): string => '0x1234',
'state_getStorage': (storage: MockState$Db, params: Array<any>): string => {
return u8aToHex(
storage[(params[0] as string)]
);
},
'system_chain': (): string => 'mockChain',
'state_getMetadata': (): string => metadata,
'system_name': (): string => 'mockClient',
'system_version': (): string => '9.8.7'
};
@@ -68,7 +72,7 @@ export default class Mock implements ProviderInterface {
}
get hasSubscriptions (): boolean {
return false;
return true;
}
isConnected (): boolean {

2
tsconfig.json
View File

@@ -6,7 +6,7 @@
"paths":
{
"@polkadot/api/*": ["packages/api/src/*"],
"@polkadot/api-rx/*": ["packages/api-rx/src/*"],
"@polkadot/api-derive/*": ["packages/api-derive/src/*"],
"@polkadot/rpc-core/*": ["packages/rpc-core/src/*"],
"@polkadot/rpc-provider/*": ["packages/rpc-provider/src/*"],
"@polkadot/rpc-rx/*": ["packages/rpc-rx/src/*"],

92
yarn.lock
View File

@@ -1455,6 +1455,11 @@
resolved "https://registry.yarnpkg.com/@types/marked/-/marked-0.4.2.tgz#64a89e53ea37f61cc0f3ee1732c555c2dbf6452f"
integrity sha512-cDB930/7MbzaGF6U3IwSQp6XBru8xWajF5PV2YZZeV8DyiliTuld11afVztGI9+yJZ29il5E+NpGA6ooV/Cjkg==
"@types/memoizee@^0.4.2":
version "0.4.2"
resolved "https://registry.yarnpkg.com/@types/memoizee/-/memoizee-0.4.2.tgz#a500158999a8144a9b46cf9a9fb49b15f1853573"
integrity sha512-bhdZXZWKfpkQuuiQjVjnPiNeBHpIAC6rfOFqlJXKD3VC35mCcolfVfXYTnk9Ppee5Mkmmz3Llgec7xCdJAbzWw==
"@types/minimatch@*", "@types/minimatch@3.0.3":
version "3.0.3"
resolved "https://registry.yarnpkg.com/@types/minimatch/-/minimatch-3.0.3.tgz#3dca0e3f33b200fc7d1139c0cd96c1268cadfd9d"
@@ -3100,6 +3105,13 @@ d3@3.5.17:
resolved "https://registry.yarnpkg.com/d3/-/d3-3.5.17.tgz#bc46748004378b21a360c9fc7cf5231790762fb8"
integrity sha1-vEZ0gAQ3iyGjYMn8fPUjF5B2L7g=
d@1:
version "1.0.0"
resolved "https://registry.yarnpkg.com/d/-/d-1.0.0.tgz#754bb5bfe55451da69a58b94d45f4c5b0462d58f"
integrity sha1-dUu1v+VUUdpppYuU1F9MWwRi1Y8=
dependencies:
es5-ext "^0.10.9"
dagre-d3-renderer@^0.4.25:
version "0.4.26"
resolved "https://registry.yarnpkg.com/dagre-d3-renderer/-/dagre-d3-renderer-0.4.26.tgz#648a491209b853ae96ddf3fea41a1f104479a5a1"
@@ -3454,6 +3466,24 @@ es-to-primitive@^1.2.0:
is-date-object "^1.0.1"
is-symbol "^1.0.2"
es5-ext@^0.10.14, es5-ext@^0.10.35, es5-ext@^0.10.45, es5-ext@^0.10.9, es5-ext@~0.10.14, es5-ext@~0.10.2, es5-ext@~0.10.46:
version "0.10.46"
resolved "https://registry.yarnpkg.com/es5-ext/-/es5-ext-0.10.46.tgz#efd99f67c5a7ec789baa3daa7f79870388f7f572"
integrity sha512-24XxRvJXNFwEMpJb3nOkiRJKRoupmjYmOPVlI65Qy2SrtxwOTB+g6ODjBKOtwEHbYrhWRty9xxOWLNdClT2djw==
dependencies:
es6-iterator "~2.0.3"
es6-symbol "~3.1.1"
next-tick "1"
es6-iterator@^2.0.1, es6-iterator@~2.0.3:
version "2.0.3"
resolved "https://registry.yarnpkg.com/es6-iterator/-/es6-iterator-2.0.3.tgz#a7de889141a05a94b0854403b2d0a0fbfa98f3b7"
integrity sha1-p96IkUGgWpSwhUQDstCg+/qY87c=
dependencies:
d "1"
es5-ext "^0.10.35"
es6-symbol "^3.1.1"
es6-promise@^4.0.3:
version "4.2.5"
resolved "https://registry.yarnpkg.com/es6-promise/-/es6-promise-4.2.5.tgz#da6d0d5692efb461e082c14817fe2427d8f5d054"
@@ -3466,6 +3496,24 @@ es6-promisify@^5.0.0:
dependencies:
es6-promise "^4.0.3"
es6-symbol@^3.1.1, es6-symbol@~3.1.1:
version "3.1.1"
resolved "https://registry.yarnpkg.com/es6-symbol/-/es6-symbol-3.1.1.tgz#bf00ef4fdab6ba1b46ecb7b629b4c7ed5715cc77"
integrity sha1-vwDvT9q2uhtG7Le2KbTH7VcVzHc=
dependencies:
d "1"
es5-ext "~0.10.14"
es6-weak-map@^2.0.2:
version "2.0.2"
resolved "https://registry.yarnpkg.com/es6-weak-map/-/es6-weak-map-2.0.2.tgz#5e3ab32251ffd1538a1f8e5ffa1357772f92d96f"
integrity sha1-XjqzIlH/0VOKH45f+hNXdy+S2W8=
dependencies:
d "1"
es5-ext "^0.10.14"
es6-iterator "^2.0.1"
es6-symbol "^3.1.1"
escape-string-regexp@^1.0.2, escape-string-regexp@^1.0.5:
version "1.0.5"
resolved "https://registry.yarnpkg.com/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz#1b61c0562190a8dff6ae3bb2cf0200ca130b86d4"
@@ -3508,6 +3556,14 @@ esutils@^2.0.2:
resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.2.tgz#0abf4f1caa5bcb1f7a9d8acc6dea4faaa04bac9b"
integrity sha1-Cr9PHKpbyx96nYrMbepPqqBLrJs=
event-emitter@^0.3.5:
version "0.3.5"
resolved "https://registry.yarnpkg.com/event-emitter/-/event-emitter-0.3.5.tgz#df8c69eef1647923c7157b9ce83840610b02cc39"
integrity sha1-34xp7vFkeSPHFXuc6DhAYQsCzDk=
dependencies:
d "1"
es5-ext "~0.10.14"
eventemitter3@^3.1.0:
version "3.1.0"
resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-3.1.0.tgz#090b4d6cdbd645ed10bf750d4b5407942d7ba163"
@@ -4943,7 +4999,7 @@ is-primitive@^2.0.0:
resolved "https://registry.yarnpkg.com/is-primitive/-/is-primitive-2.0.0.tgz#207bab91638499c07b2adf240a41a87210034575"
integrity sha1-IHurkWOEmcB7Kt8kCkGochADRXU=
is-promise@^2.1.0:
is-promise@^2.1, is-promise@^2.1.0:
version "2.1.0"
resolved "https://registry.yarnpkg.com/is-promise/-/is-promise-2.1.0.tgz#79a2a9ece7f096e80f36d2b2f3bc16c1ff4bf3fa"
integrity sha1-eaKp7OfwlugPNtKy87wWwf9L8/o=
@@ -6017,6 +6073,13 @@ lru-cache@~4.0.1:
pseudomap "^1.0.1"
yallist "^2.0.0"
lru-queue@0.1:
version "0.1.0"
resolved "https://registry.yarnpkg.com/lru-queue/-/lru-queue-0.1.0.tgz#2738bd9f0d3cf4f84490c5736c48699ac632cda3"
integrity sha1-Jzi9nw089PhEkMVzbEhpmsYyzaM=
dependencies:
es5-ext "~0.10.2"
make-dir@^1.0.0:
version "1.3.0"
resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-1.3.0.tgz#79c1033b80515bd6d24ec9933e860ca75ee27f0c"
@@ -6140,6 +6203,20 @@ mem@^4.0.0:
mimic-fn "^1.0.0"
p-is-promise "^1.1.0"
memoizee@^0.4.14:
version "0.4.14"
resolved "https://registry.yarnpkg.com/memoizee/-/memoizee-0.4.14.tgz#07a00f204699f9a95c2d9e77218271c7cd610d57"
integrity sha512-/SWFvWegAIYAO4NQMpcX+gcra0yEZu4OntmUdrBaWrJncxOqAziGFlHxc7yjKVK2uu3lpPW27P27wkR82wA8mg==
dependencies:
d "1"
es5-ext "^0.10.45"
es6-weak-map "^2.0.2"
event-emitter "^0.3.5"
is-promise "^2.1"
lru-queue "0.1"
next-tick "1"
timers-ext "^0.1.5"
meow@^3.3.0:
version "3.7.0"
resolved "https://registry.yarnpkg.com/meow/-/meow-3.7.0.tgz#72cb668b425228290abbfa856892587308a801fb"
@@ -6458,6 +6535,11 @@ needle@^2.2.1:
iconv-lite "^0.4.4"
sax "^1.2.4"
next-tick@1:
version "1.0.0"
resolved "https://registry.yarnpkg.com/next-tick/-/next-tick-1.0.0.tgz#ca86d1fe8828169b0120208e3dc8424b9db8342c"
integrity sha1-yobR/ogoFpsBICCOPchCS524NCw=
nice-try@^1.0.4:
version "1.0.5"
resolved "https://registry.yarnpkg.com/nice-try/-/nice-try-1.0.5.tgz#a3378a7696ce7d223e88fc9b764bd7ef1089e366"
@@ -8956,6 +9038,14 @@ timed-out@^4.0.0:
resolved "https://registry.yarnpkg.com/timed-out/-/timed-out-4.0.1.tgz#f32eacac5a175bea25d7fab565ab3ed8741ef56f"
integrity sha1-8y6srFoXW+ol1/q1Zas+2HQe9W8=
timers-ext@^0.1.5:
version "0.1.7"
resolved "https://registry.yarnpkg.com/timers-ext/-/timers-ext-0.1.7.tgz#6f57ad8578e07a3fb9f91d9387d65647555e25c6"
integrity sha512-b85NUNzTSdodShTIbky6ZF02e8STtVVfD+fu4aXXShEELpozH+bCpJLYMPZbsABN2wDH7fJpqIoXxJpzbf0NqQ==
dependencies:
es5-ext "~0.10.46"
next-tick "1"
tmp@0.0.31:
version "0.0.31"
resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.31.tgz#8f38ab9438e17315e5dbd8b3657e8bfb277ae4a7"