1 files changed, 37 insertions, 0 deletions
diff --git a/packages/migrations/src/utils/provider_factory.ts b/packages/migrations/src/utils/provider_factory.ts
new file mode 100644
index 000000000..14b1be982
--- /dev/null
+++ b/packages/migrations/src/utils/provider_factory.ts
@@ -0,0 +1,37 @@
+import { LedgerSubprovider } from '@0xproject/subproviders';
+import { Web3Wrapper } from '@0xproject/web3-wrapper';
+import Eth from '@ledgerhq/hw-app-eth';
+import TransportNodeHid from '@ledgerhq/hw-transport-node-hid';
+import { Provider } from 'ethereum-types';
+import ProviderEngine = require('web3-provider-engine');
+import RpcSubprovider = require('web3-provider-engine/subproviders/rpc');
+
+import { LedgerEthereumClient } from '../types';
+
+import { constants } from './constants';
+
+async function ledgerEthereumNodeJsClientFactoryAsync(): Promise<LedgerEthereumClient> {
+    const ledgerConnection = await TransportNodeHid.create();
+    const ledgerEthClient = new Eth(ledgerConnection);
+    return ledgerEthClient;
+}
+export const providerFactory = {
+    async getLedgerProviderAsync(): Promise<Provider> {
+        const provider = new ProviderEngine();
+        provider.addProvider(
+            new RpcSubprovider({
+                rpcUrl: constants.RPC_URL,
+            }),
+        );
+        const web3Wrapper = new Web3Wrapper(provider);
+        const networkId = await web3Wrapper.getNetworkIdAsync();
+        const ledgerWalletConfigs = {
+            networkId,
+            ledgerEthereumClientFactoryAsync: ledgerEthereumNodeJsClientFactoryAsync,
+        };
+        const ledgerSubprovider = new LedgerSubprovider(ledgerWalletConfigs);
+        provider.addProvider(ledgerSubprovider);
+        provider.start();
+        return provider;
+    },
+};