add type definitions for @ledgerhq/hw-transport-webusb (#38795)

types/ledgerhq__hw-transport-webusb/index.d.ts

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+// Type definitions for @ledgerhq/hw-transport-webusb 4.70
+// Project: https://github.com/LedgerHQ/ledgerjs/tree/master/packages/hw-transport-webusb, https://github.com/ledgerhq/ledgerjs
+// Definitions by: Joshua <https://github.com/questofiranon>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+/// <reference types="node" />
+import Transport, { DescriptorEvent, Observer, Subscription } from '@ledgerhq/hw-transport';
+
+declare class TransportWebUSB extends Transport {
+    constructor(device: string);
+
+    static listen(observer: Observer<DescriptorEvent<string>>): Subscription;
+
+    static request(): Promise<TransportWebUSB>;
+    static openConnection(): Promise<TransportWebUSB>;
+
+    static open(device: string): Promise<TransportWebUSB>;
+}
+
+export default TransportWebUSB;

types/ledgerhq__hw-transport-webusb/ledgerhq__hw-transport-webusb-tests.ts

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+import TransportWebUSB from '@ledgerhq/hw-transport-webusb';
+
+// $ExpectType Promise<boolean>
+TransportWebUSB.isSupported();
+// $ExpectType Promise<ReadonlyArray<string>>
+TransportWebUSB.list();
+// $ExpectType Promise<TransportWebUSB>
+TransportWebUSB.request();
+// $ExpectType Promise<TransportWebUSB>
+TransportWebUSB.open('test');
+// $ExpectType Promise<TransportWebUSB>
+TransportWebUSB.openConnection();
+
+const test = TransportWebUSB.open('test').then(transport => {
+    // $ExpectType void
+    transport.setScrambleKey('BTC');
+
+    // $ExpectType Promise<Buffer>
+    transport.exchange(Buffer.from('test', 'hex'));
+
+    // $ExpectType Promise<void>
+    transport.close();
+});

types/ledgerhq__hw-transport-webusb/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": ["es6"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": ["../"],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true,
+        "paths": {
+            "@ledgerhq/hw-transport": ["ledgerhq__hw-transport"],
+            "@ledgerhq/hw-transport-webusb": ["ledgerhq__hw-transport-webusb"]
+        }
+    },
+    "files": ["index.d.ts", "ledgerhq__hw-transport-webusb-tests.ts"]
+}

types/ledgerhq__hw-transport-webusb/tslint.json

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+{
+    "extends": "dtslint/dt.json"
+}