diff --git a/types/ledgerhq__hw-transport-node-hid/index.d.ts b/types/ledgerhq__hw-transport-node-hid/index.d.ts
new file mode 100644
index 0000000000..91fa7263dc
--- /dev/null
+++ b/types/ledgerhq__hw-transport-node-hid/index.d.ts
@@ -0,0 +1,26 @@
+// Type definitions for @ledgerhq/hw-transport-node-hid 4.22
+// Project: https://github.com/LedgerHQ/ledgerjs/tree/master/packages/hw-transport-node-hid
+// Definitions by: Daniel Byrne <https://github.com/danwbyrne>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+/// <reference types = "node"/>
+import HID = require("node-hid");
+import Transport from "@ledgerhq/hw-transport";
+
+declare class TransportNodeHid extends Transport {
+    constructor(
+        device: HID.HID,
+        ledgerTransport?: boolean,
+        timeout?: number
+    );
+    static open(path: string): Promise<TransportNodeHid>;
+    setScrambleKey(): void;
+
+    device: HID.HID;
+    ledgerTransport: boolean;
+    timeout: number;
+    exchangeStack: any[];
+}
+
+export default TransportNodeHid;
diff --git a/types/ledgerhq__hw-transport-node-hid/ledgerhq__hw-transport-node-hid-tests.ts b/types/ledgerhq__hw-transport-node-hid/ledgerhq__hw-transport-node-hid-tests.ts
new file mode 100644
index 0000000000..90da827dfa
--- /dev/null
+++ b/types/ledgerhq__hw-transport-node-hid/ledgerhq__hw-transport-node-hid-tests.ts
@@ -0,0 +1,19 @@
+import Transport from "@ledgerhq/hw-transport-node-hid";
+
+// $ExpectType Promise<boolean>
+Transport.isSupported();
+// $ExpectType Promise<ReadonlyArray<string>>
+Transport.list();
+// $ExpectType Promise<TransportNodeHid>
+Transport.open("test");
+
+const test = Transport.open("test").then(transport => {
+    // $ExpectType void
+    transport.setScrambleKey();
+
+    // $ExpectType Promise<Buffer>
+    transport.exchange(Buffer.from("test", "hex"));
+
+    // $ExpectType Promise<void>
+    transport.close();
+});
diff --git a/types/ledgerhq__hw-transport-node-hid/tsconfig.json b/types/ledgerhq__hw-transport-node-hid/tsconfig.json
new file mode 100644
index 0000000000..73fde70c50
--- /dev/null
+++ b/types/ledgerhq__hw-transport-node-hid/tsconfig.json
@@ -0,0 +1,22 @@
+{
+    "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-node-hid": [
+                "ledgerhq__hw-transport-node-hid"
+            ]
+        }
+    },
+    "files": ["index.d.ts", "ledgerhq__hw-transport-node-hid-tests.ts"]
+}
diff --git a/types/ledgerhq__hw-transport-node-hid/tslint.json b/types/ledgerhq__hw-transport-node-hid/tslint.json
new file mode 100644
index 0000000000..f93cf8562a
--- /dev/null
+++ b/types/ledgerhq__hw-transport-node-hid/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}
diff --git a/types/ledgerhq__hw-transport-u2f/index.d.ts b/types/ledgerhq__hw-transport-u2f/index.d.ts
new file mode 100644
index 0000000000..b08b6c27ff
--- /dev/null
+++ b/types/ledgerhq__hw-transport-u2f/index.d.ts
@@ -0,0 +1,15 @@
+// Type definitions for @ledgerhq/hw-transport-u2f 4.21
+// Project: https://github.com/LedgerHQ/ledgerjs/tree/master/packages/hw-transport-u2f
+// Definitions by: Daniel Byrne <https://github.com/danwbyrne>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+/// <reference types="node" />
+import Transport from "@ledgerhq/hw-transport";
+
+declare class TransportU2F extends Transport {
+    constructor();
+    static open(_: any, _openTimeout?: number): Promise<TransportU2F>;
+}
+
+export default TransportU2F;
diff --git a/types/ledgerhq__hw-transport-u2f/ledgerhq__hw-transport-u2f-tests.ts b/types/ledgerhq__hw-transport-u2f/ledgerhq__hw-transport-u2f-tests.ts
new file mode 100644
index 0000000000..2261f49fa4
--- /dev/null
+++ b/types/ledgerhq__hw-transport-u2f/ledgerhq__hw-transport-u2f-tests.ts
@@ -0,0 +1,19 @@
+import Transport from "@ledgerhq/hw-transport-u2f";
+
+// $ExpectType Promise<boolean>
+Transport.isSupported();
+// $ExpectType Promise<ReadonlyArray<string>>
+Transport.list();
+// $ExpectType Promise<TransportU2F>
+Transport.open("test");
+
+const test = Transport.open('test').then(transport => {
+    // $ExpectType void
+    transport.setScrambleKey('BTC');
+
+    // $ExpectType Promise<Buffer>
+    transport.exchange(Buffer.from("test", "hex"));
+
+    // $ExpectType Promise<void>
+    transport.close();
+});
diff --git a/types/ledgerhq__hw-transport-u2f/tsconfig.json b/types/ledgerhq__hw-transport-u2f/tsconfig.json
new file mode 100644
index 0000000000..213de26f56
--- /dev/null
+++ b/types/ledgerhq__hw-transport-u2f/tsconfig.json
@@ -0,0 +1,20 @@
+{
+    "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-u2f": ["ledgerhq__hw-transport-u2f"]
+        }
+    },
+    "files": ["index.d.ts", "ledgerhq__hw-transport-u2f-tests.ts"]
+}
diff --git a/types/ledgerhq__hw-transport-u2f/tslint.json b/types/ledgerhq__hw-transport-u2f/tslint.json
new file mode 100644
index 0000000000..f93cf8562a
--- /dev/null
+++ b/types/ledgerhq__hw-transport-u2f/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}
diff --git a/types/ledgerhq__hw-transport/index.d.ts b/types/ledgerhq__hw-transport/index.d.ts
new file mode 100644
index 0000000000..6b3854a343
--- /dev/null
+++ b/types/ledgerhq__hw-transport/index.d.ts
@@ -0,0 +1,52 @@
+// Type definitions for @ledgerhq/hw-transport 4.21
+// Project: https://github.com/LedgerHQ/ledgerjs/tree/master/packages/hw-transport
+// Definitions by: Daniel Byrne <https://github.com/danwbyrne>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+/// <reference types="node" />
+
+declare class Transport<TDescriptor extends Descriptor = string> {
+    constructor();
+    static isSupported(): Promise<boolean>;
+    static list(): Promise<ReadonlyArray<Descriptor>>;
+    static listen(
+        observer: Observer<DescriptorEvent<Descriptor>>
+    ): Subscription;
+    static open(
+        descriptor: Descriptor,
+        timeout?: number
+    ): Promise<Transport<typeof descriptor>>;
+    static create(
+        openTimeout?: number,
+        listenTimeout?: number
+    ): Promise<Transport<Descriptor>>;
+    exchange(apdu: Buffer): Promise<Buffer>;
+    setScrambleKey(key: string): void;
+    close(): Promise<void>;
+    on(eventName: string, cb: any): void;
+    off(eventName: string, cb: any): void;
+    setDebugMode(debug: boolean | ((log: string) => void)): void;
+    setExchangeTimeout(exchangeTimeout: number): void;
+    send(cla: number, ins: number, p1: number, p2: number, data: Buffer, statusList: ReadonlyArray<number>): Promise<Buffer>;
+}
+
+export type Device = any;
+export type Descriptor = string; // ?
+export interface DescriptorEvent<Descriptor> {
+    type: "add" | "remove";
+    descriptor: Descriptor;
+    device?: Device;
+}
+export interface Observer<Ev> {
+    readonly next: (event: Ev) => any;
+    readonly error: (e: any) => any;
+    readonly complete: () => any;
+}
+export interface Subscription {
+    readonly unsubscribe: () => void;
+}
+export function getAltStatusMessage(code: number): string;
+export const StatusCodes: {[k in string]: number};
+
+export default Transport;
diff --git a/types/ledgerhq__hw-transport/ledgerhq__hw-transport-tests.ts b/types/ledgerhq__hw-transport/ledgerhq__hw-transport-tests.ts
new file mode 100644
index 0000000000..0f1b289976
--- /dev/null
+++ b/types/ledgerhq__hw-transport/ledgerhq__hw-transport-tests.ts
@@ -0,0 +1,19 @@
+import Transport from "@ledgerhq/hw-transport";
+
+// $ExpectType Promise<boolean>
+Transport.isSupported();
+// $ExpectType Promise<ReadonlyArray<string>>
+Transport.list();
+// $ExpectType Promise<Transport<string>>
+Transport.open("test");
+
+const test = Transport.open("test").then(transport => {
+    // $ExpectType void
+    transport.setScrambleKey('test');
+
+    // $ExpectType Promise<Buffer>
+    transport.exchange(Buffer.from("test", "hex"));
+
+    // $ExpectType Promise<void>
+    transport.close();
+});
diff --git a/types/ledgerhq__hw-transport/tsconfig.json b/types/ledgerhq__hw-transport/tsconfig.json
new file mode 100644
index 0000000000..47ca4863cf
--- /dev/null
+++ b/types/ledgerhq__hw-transport/tsconfig.json
@@ -0,0 +1,19 @@
+{
+    "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"]
+        }
+    },
+    "files": ["index.d.ts", "ledgerhq__hw-transport-tests.ts"]
+}
diff --git a/types/ledgerhq__hw-transport/tslint.json b/types/ledgerhq__hw-transport/tslint.json
new file mode 100644
index 0000000000..f93cf8562a
--- /dev/null
+++ b/types/ledgerhq__hw-transport/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}