3 files changed, 78 insertions, 0 deletions
diff --git a/packages/migrations/src/utils/artifact_writer.ts b/packages/migrations/src/utils/artifact_writer.ts
new file mode 100644
index 000000000..2da5a09dd
--- /dev/null
+++ b/packages/migrations/src/utils/artifact_writer.ts
@@ -0,0 +1,26 @@
+import { BaseContract } from '@0xproject/base-contract';
+import { ContractArtifact } from '@0xproject/sol-compiler';
+import * as fs from 'fs';
+import * as path from 'path';
+
+export class ArtifactWriter {
+    private _artifactsDir: string;
+    private _networkId: number;
+    constructor(artifactsDir: string, networkId: number) {
+        this._artifactsDir = artifactsDir;
+        this._networkId = networkId;
+    }
+    // This updates the artifact file but does not update the `artifacts` module above. It will not
+    // contain the saved artifact changes.
+    public saveArtifact(contract: BaseContract): void {
+        const contractName = contract.contractName;
+        const artifactFile = path.join(this._artifactsDir, `${contractName}.json`);
+        const artifact: ContractArtifact = JSON.parse(fs.readFileSync(artifactFile).toString());
+        artifact.networks[this._networkId] = {
+            address: contract.address,
+            links: {},
+            constructorArgs: JSON.stringify(contract.constructorArgs),
+        };
+        fs.writeFileSync(artifactFile, JSON.stringify(artifact, null, '\t'));
+    }
+}
diff --git a/packages/migrations/src/utils/constants.ts b/packages/migrations/src/utils/constants.ts
new file mode 100644
index 000000000..21887ab16
--- /dev/null
+++ b/packages/migrations/src/utils/constants.ts
@@ -0,0 +1,15 @@
+import { BigNumber } from '@0xproject/utils';
+
+export const constants = {
+    ASSET_PROXY_OWNER_OWNERS: [
+        '0x9df8137872ac09a8fee71d0da5c7539923fb9bf0',
+        '0xcf34d44db312d188789f43a63d11cf2bebb4da15',
+        '0x73fd50f2a6beac9cdac9fe87ef68a18edc415831',
+    ],
+    ASSET_PROXY_OWNER_TIMELOCK: new BigNumber(0),
+    ASSET_PROXY_OWNER_CONFIRMATIONS: new BigNumber(1),
+    ERC20_PROXY_ID: '0xf47261b0',
+    ERC721_PROXY_ID: '0x08e937fa',
+    NULL_ADDRESS: '0x0000000000000000000000000000000000000000',
+    RPC_URL: 'http://localhost:8545',
+};
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;
+    },
+};