8 files changed, 160 insertions, 0 deletions
diff --git a/packages/dev-utils/README.md b/packages/dev-utils/README.md
new file mode 100644
index 000000000..5a8e71f2f
--- /dev/null
+++ b/packages/dev-utils/README.md
@@ -0,0 +1,9 @@
+## Dev utils
+
+Dev utils to be shared across 0x projects and packages
+
+## Install
+
+```bash
+yarn add @0xproject/dev-utils
+```
diff --git a/packages/dev-utils/package.json b/packages/dev-utils/package.json
new file mode 100644
index 000000000..1cd54f15f
--- /dev/null
+++ b/packages/dev-utils/package.json
@@ -0,0 +1,37 @@
+{
+    "name": "@0xproject/dev-utils",
+    "version": "0.0.6",
+    "description": "0x dev TS utils",
+    "main": "lib/index.js",
+    "types": "lib/index.d.ts",
+    "scripts": {
+        "build": "tsc",
+        "clean": "shx rm -rf lib",
+        "lint": "tslint --project . 'src/**/*.ts'"
+    },
+    "license": "Apache-2.0",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/0xProject/0x.js.git"
+    },
+    "bugs": {
+        "url": "https://github.com/0xProject/0x.js/issues"
+    },
+    "homepage": "https://github.com/0xProject/0x.js/packages/dev-utils/README.md",
+    "devDependencies": {
+        "@0xproject/tslint-config": "^0.4.3",
+        "@types/lodash": "^4.14.86",
+        "npm-run-all": "^4.1.2",
+        "shx": "^0.2.2",
+        "tslint": "5.8.0",
+        "types-bn": "^0.0.1",
+        "types-ethereumjs-util": "0xProject/types-ethereumjs-util",
+        "typescript": "~2.6.1"
+    },
+    "dependencies": {
+        "@0xproject/utils": "^0.2.1",
+        "ethereumjs-util": "^5.1.2",
+        "lodash": "^4.17.4",
+        "request-promise-native": "^1.0.5"
+    }
+}
diff --git a/packages/dev-utils/scripts/postpublish.js b/packages/dev-utils/scripts/postpublish.js
new file mode 100644
index 000000000..16d67e03f
--- /dev/null
+++ b/packages/dev-utils/scripts/postpublish.js
@@ -0,0 +1,15 @@
+const postpublish_utils = require('../../../scripts/postpublish_utils');
+const packageJSON = require('../package.json');
+
+const subPackageName = packageJSON.name;
+
+postpublish_utils
+    .getLatestTagAndVersionAsync(subPackageName)
+    .then(function(result) {
+        const releaseName = postpublish_utils.getReleaseName(subPackageName, result.version);
+        const assets = [];
+        return postpublish_utils.publishReleaseNotes(result.tag, releaseName, assets);
+    })
+    .catch(function(err) {
+        throw err;
+    });
diff --git a/packages/dev-utils/src/blockchain_lifecycle.ts b/packages/dev-utils/src/blockchain_lifecycle.ts
new file mode 100644
index 000000000..18f5d5c61
--- /dev/null
+++ b/packages/dev-utils/src/blockchain_lifecycle.ts
@@ -0,0 +1,23 @@
+import { RPC } from './rpc';
+
+export class BlockchainLifecycle {
+    private _rpc: RPC;
+    private _snapshotIdsStack: number[];
+    constructor(url: string) {
+        this._rpc = new RPC(url);
+        this._snapshotIdsStack = [];
+    }
+    // TODO: In order to run these tests on an actual node, we should check if we are running against
+    // TestRPC, if so, use snapshots, otherwise re-deploy contracts before every test
+    public async startAsync(): Promise<void> {
+        const snapshotId = await this._rpc.takeSnapshotAsync();
+        this._snapshotIdsStack.push(snapshotId);
+    }
+    public async revertAsync(): Promise<void> {
+        const snapshotId = this._snapshotIdsStack.pop() as number;
+        const didRevert = await this._rpc.revertSnapshotAsync(snapshotId);
+        if (!didRevert) {
+            throw new Error(`Snapshot with id #${snapshotId} failed to revert`);
+        }
+    }
+}
diff --git a/packages/dev-utils/src/index.ts b/packages/dev-utils/src/index.ts
new file mode 100644
index 000000000..9ba0cb5cf
--- /dev/null
+++ b/packages/dev-utils/src/index.ts
@@ -0,0 +1,2 @@
+export { RPC } from './rpc';
+export { BlockchainLifecycle } from './blockchain_lifecycle';
diff --git a/packages/dev-utils/src/rpc.ts b/packages/dev-utils/src/rpc.ts
new file mode 100644
index 000000000..36f8b1ef9
--- /dev/null
+++ b/packages/dev-utils/src/rpc.ts
@@ -0,0 +1,60 @@
+import * as ethUtil from 'ethereumjs-util';
+import * as request from 'request-promise-native';
+
+export class RPC {
+    private _url: string;
+    private _id: number;
+    constructor(url: string) {
+        this._url = url;
+        this._id = 0;
+    }
+    public async takeSnapshotAsync(): Promise<number> {
+        const method = 'evm_snapshot';
+        const params: any[] = [];
+        const payload = this._toPayload(method, params);
+        const snapshotIdHex = await this._sendAsync(payload);
+        const snapshotId = ethUtil.bufferToInt(ethUtil.toBuffer(snapshotIdHex));
+        return snapshotId;
+    }
+    public async revertSnapshotAsync(snapshotId: number): Promise<boolean> {
+        const method = 'evm_revert';
+        const params = [snapshotId];
+        const payload = this._toPayload(method, params);
+        const didRevert = await this._sendAsync(payload);
+        return didRevert;
+    }
+    public async increaseTimeAsync(time: number) {
+        const method = 'evm_increaseTime';
+        const params = [time];
+        const payload = this._toPayload(method, params);
+        return this._sendAsync(payload);
+    }
+    public async mineBlockAsync(): Promise<void> {
+        const method = 'evm_mine';
+        const params: any[] = [];
+        const payload = this._toPayload(method, params);
+        await this._sendAsync(payload);
+    }
+    private _toPayload(method: string, params: any[] = []): string {
+        const payload = JSON.stringify({
+            id: this._id,
+            method,
+            params,
+        });
+        this._id += 1;
+        return payload;
+    }
+    private async _sendAsync(payload: string): Promise<any> {
+        const opts = {
+            method: 'POST',
+            uri: this._url,
+            body: payload,
+            headers: {
+                'content-type': 'application/json',
+            },
+        };
+        const bodyString = await request(opts);
+        const body = JSON.parse(bodyString);
+        return body.result;
+    }
+}
diff --git a/packages/dev-utils/tsconfig.json b/packages/dev-utils/tsconfig.json
new file mode 100644
index 000000000..b28e45170
--- /dev/null
+++ b/packages/dev-utils/tsconfig.json
@@ -0,0 +1,11 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": {
+        "outDir": "lib"
+    },
+    "include": [
+        "./src/**/*",
+        "../../node_modules/types-bn/index.d.ts",
+        "../../node_modules/types-ethereumjs-util/index.d.ts"
+    ]
+}
diff --git a/packages/dev-utils/tslint.json b/packages/dev-utils/tslint.json
new file mode 100644
index 000000000..ffaefe83a
--- /dev/null
+++ b/packages/dev-utils/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": ["@0xproject/tslint-config"]
+}