3 files changed, 127 insertions, 0 deletions
diff --git a/packages/subproviders/src/globals.d.ts b/packages/subproviders/src/globals.d.ts
index c00dc4099..287d5e0fe 100644
--- a/packages/subproviders/src/globals.d.ts
+++ b/packages/subproviders/src/globals.d.ts
@@ -3,6 +3,59 @@
 // tslint:disable:async-suffix
 // tslint:disable:completed-docs
 
+// Ethereumjs-tx declarations
+
+// Ledgerco declarations
+interface ECSignatureString {
+    v: string;
+    r: string;
+    s: string;
+}
+interface ECSignature {
+    v: number;
+    r: string;
+    s: string;
+}
+interface ECSignatureBuffer {
+    v: number;
+    r: Buffer;
+    s: Buffer;
+}
+
+interface LedgerTransport {
+    close(): Promise<void>;
+}
+
+declare module '@ledgerhq/hw-app-eth' {
+    class Eth {
+        public transport: LedgerTransport;
+        constructor(transport: LedgerTransport);
+        public getAddress(
+            path: string,
+            boolDisplay?: boolean,
+            boolChaincode?: boolean,
+        ): Promise<{ publicKey: string; address: string; chainCode: string }>;
+        public signTransaction(path: string, rawTxHex: string): Promise<ECSignatureString>;
+        public getAppConfiguration(): Promise<{ arbitraryDataEnabled: number; version: string }>;
+        public signPersonalMessage(path: string, messageHex: string): Promise<ECSignature>;
+    }
+    export default Eth;
+}
+
+declare module '@ledgerhq/hw-transport-u2f' {
+    export default class TransportU2F implements LedgerTransport {
+        public static create(): Promise<LedgerTransport>;
+        public close(): Promise<void>;
+    }
+}
+
+declare module '@ledgerhq/hw-transport-node-hid' {
+    export default class TransportNodeHid implements LedgerTransport {
+        public static create(): Promise<LedgerTransport>;
+        public close(): Promise<void>;
+    }
+}
+
 declare module '*.json' {
     const json: any;
     /* tslint:disable */
diff --git a/packages/subproviders/src/index.ts b/packages/subproviders/src/index.ts
index 9194c1341..802a27cb1 100644
--- a/packages/subproviders/src/index.ts
+++ b/packages/subproviders/src/index.ts
@@ -15,6 +15,7 @@ export { Subprovider } from './subproviders/subprovider';
 export { NonceTrackerSubprovider } from './subproviders/nonce_tracker';
 export { PrivateKeyWalletSubprovider } from './subproviders/private_key_wallet';
 export { MnemonicWalletSubprovider } from './subproviders/mnemonic_wallet';
+export { EthLightwalletSubprovider } from './subproviders/eth_lightwallet_subprovider';
 export {
     Callback,
     ErrorCallback,
diff --git a/packages/subproviders/src/subproviders/eth_lightwallet_subprovider.ts b/packages/subproviders/src/subproviders/eth_lightwallet_subprovider.ts
new file mode 100644
index 000000000..b594ffb24
--- /dev/null
+++ b/packages/subproviders/src/subproviders/eth_lightwallet_subprovider.ts
@@ -0,0 +1,73 @@
+import { assert } from '@0xproject/assert';
+import { addressUtils } from '@0xproject/utils';
+import * as lightwallet from 'eth-lightwallet';
+import EthereumTx = require('ethereumjs-tx');
+import * as ethUtil from 'ethereumjs-util';
+import * as _ from 'lodash';
+
+import { PartialTxParams, WalletSubproviderErrors } from '../types';
+
+import { BaseWalletSubprovider } from './base_wallet_subprovider';
+import { PrivateKeyWalletSubprovider } from './private_key_wallet';
+
+/*
+ * This class implements the web3-provider-engine subprovider interface and forwards
+ * requests involving user accounts and signing operations to eth-lightwallet
+ *
+ * Source: https://github.com/MetaMask/provider-engine/blob/master/subproviders/subprovider.js
+ */
+export class EthLightwalletSubprovider extends BaseWalletSubprovider {
+    private _keystore: lightwallet.keystore;
+    private _pwDerivedKey: Uint8Array;
+    constructor(keystore: lightwallet.keystore, pwDerivedKey: Uint8Array) {
+        super();
+        this._keystore = keystore;
+        this._pwDerivedKey = pwDerivedKey;
+    }
+    /**
+     * Retrieve the accounts associated with the eth-lightwallet instance.
+     * This method is implicitly called when issuing a `eth_accounts` JSON RPC request
+     * via your providerEngine instance.
+     *
+     * @return An array of accounts
+     */
+    public async getAccountsAsync(): Promise<string[]> {
+        const accounts = this._keystore.getAddresses();
+        return accounts;
+    }
+    /**
+     * Signs a transaction with the account specificed by the `from` field in txParams.
+     * If you've added this Subprovider to your app's provider, you can simply send
+     * an `eth_sendTransaction` JSON RPC request, and this method will be called auto-magically.
+     * If you are not using this via a ProviderEngine instance, you can call it directly.
+     * @param txParams Parameters of the transaction to sign
+     * @return Signed transaction hex string
+     */
+    public async signTransactionAsync(txParams: PartialTxParams): Promise<string> {
+        // Lightwallet loses the chain id information when hex encoding the transaction
+        // this results in a different signature on certain networks. PrivateKeyWallet
+        // respects this as it uses the parameters passed in
+        let privKey = this._keystore.exportPrivateKey(txParams.from, this._pwDerivedKey);
+        const privKeyWallet = new PrivateKeyWalletSubprovider(privKey);
+        const privKeySignature = await privKeyWallet.signTransactionAsync(txParams);
+        privKey = '';
+        return privKeySignature;
+    }
+    /**
+     * Sign a personal Ethereum signed message. The signing account will be the account
+     * associated with the provided address.
+     * If you've added the MnemonicWalletSubprovider to your app's provider, you can simply send an `eth_sign`
+     * or `personal_sign` JSON RPC request, and this method will be called auto-magically.
+     * If you are not using this via a ProviderEngine instance, you can call it directly.
+     * @param data Hex string message to sign
+     * @param address Address of the account to sign with
+     * @return Signature hex string (order: rsv)
+     */
+    public async signPersonalMessageAsync(data: string, address: string): Promise<string> {
+        let privKey = this._keystore.exportPrivateKey(address, this._pwDerivedKey);
+        const privKeyWallet = new PrivateKeyWalletSubprovider(privKey);
+        privKey = '';
+        const result = privKeyWallet.signPersonalMessageAsync(data, address);
+        return result;
+    }
+}