digest

.gitignore

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+/target
+tarpaulin-report.html
+.env
+cobertura.xml
+prod/
+node_modules/
+coverage
+dist/
+docs

jest.config.ts

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+/*
+ * For a detailed explanation regarding each configuration property and type check, visit:
+ * https://jestjs.io/docs/en/configuration.html
+ */
+
+export default {
+  // All imported modules in your tests should be mocked automatically
+  // automock: false,
+
+  // Stop running tests after `n` failures
+  // bail: 0,
+
+  // The directory where Jest should store its cached dependency information
+  // cacheDirectory: "/tmp/jest_rs",
+
+  // Automatically clear mock calls and instances between every test
+  clearMocks: true,
+
+  // Indicates whether the coverage information should be collected while executing the test
+  collectCoverage: true,
+
+  // An array of glob patterns indicating a set of files for which coverage information should be collected
+  // collectCoverageFrom: undefined,
+
+  // The directory where Jest should output its coverage files
+  coverageDirectory: 'coverage',
+
+  // An array of regexp pattern strings used to skip coverage collection
+  coveragePathIgnorePatterns: ['/node_modules/', 'setupTests.ts', 'setUpTests.ts'],
+
+  // Indicates which provider should be used to instrument code for coverage
+  coverageProvider: 'v8',
+
+  // A list of reporter names that Jest uses when writing coverage reports
+  // coverageReporters: [
+  //   "json",
+  //   "text",
+  //   "lcov",
+  //   "clover"
+  // ],
+
+  // An object that configures minimum threshold enforcement for coverage results
+  // coverageThreshold: undefined,
+
+  // A path to a custom dependency extractor
+  // dependencyExtractor: undefined,
+
+  // Make calling deprecated APIs throw helpful error messages
+  // errorOnDeprecated: false,
+
+  // Force coverage collection from ignored files using an array of glob patterns
+  // forceCoverageMatch: [],
+
+  // A path to a module which exports an async function that is triggered once before all test suites
+  // globalSetup: undefined,
+
+  // A path to a module which exports an async function that is triggered once after all test suites
+  // globalTeardown: undefined,
+
+  // A set of global variables that need to be available in all test environments
+  // globals: {},
+
+  // The maximum amount of workers used to run your tests. Can be specified as % or a number. E.g. maxWorkers: 10% will use 10% of your CPU amount + 1 as the maximum worker number. maxWorkers: 2 will use a maximum of 2 workers.
+  // maxWorkers: "50%",
+
+  // An array of directory names to be searched recursively up from the requiring module's location
+  // moduleDirectories: [
+  //   "node_modules"
+  // ],
+
+  // An array of file extensions your modules use
+  // moduleFileExtensions: [
+  //   "js",
+  //   "json",
+  //   "jsx",
+  //   "ts",
+  //   "tsx",
+  //   "node"
+  // ],
+
+  // A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
+  // moduleNameMapper: {},
+
+  // An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
+  // modulePathIgnorePatterns: [],
+
+  // Activates notifications for test results
+  // notify: false,
+
+  // An enum that specifies notification mode. Requires { notify: true }
+  // notifyMode: "failure-change",
+
+  // A preset that is used as a base for Jest's configuration
+  // preset: undefined,
+
+  // Run tests from one or more projects
+  // projects: undefined,
+
+  // Use this configuration option to add custom reporters to Jest
+  // reporters: undefined,
+
+  // Automatically reset mock state between every test
+  // resetMocks: false,
+
+  // Reset the module registry before running each individual test
+  // resetModules: false,
+
+  // A path to a custom resolver
+  // resolver: undefined,
+
+  // Automatically restore mock state between every test
+  // restoreMocks: false,
+
+  // The root directory that Jest should scan for tests and modules within
+  // rootDir: undefined,
+
+  // A list of paths to directories that Jest should use to search for files in
+  roots: ['js/'],
+
+  // Allows you to use a custom runner instead of Jest's default test runner
+  // runner: "jest-runner",
+
+  // The paths to modules that run some code to configure or set up the testing environment before each test
+  // setupFiles: [],
+
+  // A list of paths to modules that run some code to configure or set up the testing framework before each test
+  // setupFilesAfterEnv: [],
+
+  // The number of seconds after which a test is considered as slow and reported as such in the results.
+  // slowTestThreshold: 5,
+
+  // A list of paths to snapshot serializer modules Jest should use for snapshot testing
+  // snapshotSerializers: [],
+
+  // The test environment that will be used for testing
+  // testEnvironment: "jest-environment-jsdom",
+
+  // Options that will be passed to the testEnvironment
+  // testEnvironmentOptions: {},
+
+  // Adds a location field to test results
+  // testLocationInResults: false,
+
+  // The glob patterns Jest uses to detect test files
+  testMatch: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)+(spec|test).[tj]s?(x)'],
+
+  // An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
+  // testPathIgnorePatterns: [
+  //   "/node_modules/"
+  // ],
+
+  // The regexp pattern or array of patterns that Jest uses to detect test files
+  // testRegex: [],
+
+  // This option allows the use of a custom results processor
+  // testResultsProcessor: undefined,
+
+  // This option allows use of a custom test runner
+  // testRunner: "jasmine2",
+
+  // This option sets the URL for the jsdom environment. It is reflected in properties such as location.href
+  testURL: 'http://example.com/widget/?sitekey=imbatman',
+
+  // Setting this value to "fake" allows the use of fake timers for functions such as "setTimeout"
+  // timers: "real",
+
+  // A map from regular expressions to paths to transformers
+  // transform: undefined,
+  transform: {
+    '^.+\\.(ts|tsx)$': 'ts-jest',
+  },
+
+  // An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
+  // transformIgnorePatterns: [
+  //   "/node_modules/",
+  //   "\\.pnp\\.[^\\/]+$"
+  // ],
+
+  // An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
+  // unmockedModulePathPatterns: undefined,
+
+  // Indicates whether each individual test should be reported during the run
+  // verbose: undefined,
+
+  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
+  // watchPathIgnorePatterns: [],
+
+  // Whether to use watchman for file crawling
+  // watchman: true,
+};

package.json

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+{
+  "author": "Aravinth Manivannan <realaravinth@batsense.net>",
+  "name": "pow_sha256-polyfill",
+  "license": "(MIT OR Apache-2.0)",
+  "keywords": [
+    "mCaptcha",
+    "CAPTCHA",
+    "proof of work"
+  ],
+  "homepage": "https://mcaptcha.org",
+  "bugs": {
+    "url": "https://github.com/mCaptcha/pow_sha256-polyfill/issues",
+    "email": "realaravinth@batsense.net"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mCaptcha/pow_sha256-polyfill.git"
+  },
+  "version": "0.1.0",
+  "scripts": {
+    "build": "webpack --mode production",
+    "start": "rimraf dist pkg && webpack-dev-server --open -d",
+    "test": "yarn build && yarn jest",
+    "doc": "yarn build && yarn typedoc js/index.ts"
+  },
+  "devDependencies": {
+    "@types/jest": "^26.0.23",
+    "@types/jsdom": "^16.2.10",
+    "@types/node": "^15.0.2",
+    "@types/sinon": "^10.0.0",
+    "copy-webpack-plugin": "^5.0.3",
+    "dart-sass": "^1.25.0",
+    "jest": "^26.6.3",
+    "jsdom": "^16.5.3",
+    "rimraf": "^3.0.0",
+    "sinon": "^10.0.0",
+    "ts-jest": "^26.5.6",
+    "ts-loader": "^8.0.0",
+    "ts-node": "^9.1.1",
+    "typedoc": "^0.20.36",
+    "typescript": "^4.1.0",
+    "webpack": "^5.0.0",
+    "webpack-cli": "^4.6.0",
+    "webpack-dev-server": "^3.1.14"
+  }
+}

src/index.ts

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+const digest = async (message: string) => {
+  const msgUint8 = new TextEncoder().encode(message); // encode as (utf-8) Uint8Array
+  const hashBuffer = await crypto.subtle.digest('SHA-256', msgUint8); // hash the message
+  const hashArray = Array.from(new Uint8Array(hashBuffer)); // convert buffer to byte array
+//  const hashHex = hashArray.map(b => b.toString(16).padStart(2, '0')).join(''); // convert bytes to hex string
+//  return hashHex;
+  return hashArray;
+}
+
+//const digestHex = await digestMessage(text);
+
+//digest("salt" + "msg" + 1).then(d => console.log(d));

tsconfig.json

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+{
+  "compilerOptions": {
+    "incremental": true,
+    "target": "es5",
+    "module": "es2020",
+    "allowJs": false,
+    "sourceMap": true,
+    "outDir": "./dist/bundle",
+    "rootDir": "./src/",
+    "removeComments": true,
+    "moduleResolution": "node",
+
+    //"strict": true,
+    "noImplicitAny": true,
+    //"strictNullChecks": true,
+    //"strictFunctionTypes": true,
+    //"strictBindCallApply": true,
+    //"strictPropertyInitialization": true,
+    //"noImplicitThis": true,
+    //"alwaysStrict": true,
+
+    //"noUnusedLocals": true,
+    //"noUnusedParameters": true,
+    //"noImplicitReturns": true,
+    //"noFallthroughCasesInSwitch": true,
+    //"noUncheckedIndexedAccess": true,
+    //"noPropertyAccessFromIndexSignature": true,
+
+    "esModuleInterop": true,
+
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true
+  },
+  "exclude": [
+    "node_modules",
+    "static",
+    "docs",
+    "jest.config.ts",
+    "**/*.test.ts",
+    "tmp",
+    "**/*setupTests"
+  ],
+
+  "typedocOptions": {
+    "entryPoints": ["src/index.ts"],
+    "out": "docs"
+  }
+}

webpack.config.js

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+('use strict');
+const path = require('path');
+
+const dist = path.resolve(__dirname, 'dist');
+
+module.exports = {
+  //devtool: 'inline-source-map',
+  //mode: 'development',
+  mode: 'production',
+  entry: './src/index.ts',
+  output: {
+    path: dist,
+    filename: 'bundle.js',
+  },
+  module: {
+    rules: [
+      {
+        test: /\.tsx?$/,
+        loader: 'ts-loader',
+      },
+    ],
+  },
+  resolve: {
+    extensions: ['.ts', '.tsx', '.js'],
+  },
+
+  plugins: [],
+  optimization: {
+    minimizer: [
+      // For webpack@5 you can use the `...` syntax to extend existing minimizers (i.e. `terser-webpack-plugin`), uncomment the next line
+      `...`,
+    ],
+  },
+  experiments: {
+    //  executeModule: true,
+    //  outputModule: true,
+    //syncWebAssembly: true,
+    //  topLevelAwait: true,
+    //asyncWebAssembly: true,
+    //  layers: true,
+    //  lazyCompilation: true,
+  },
+};