From 166a1070e57d9aeab59c042d77ebd070f31a0851 Mon Sep 17 00:00:00 2001
From: Remco Bloemen <remco-git@xn--2-umb.com>
Date: Thu, 23 Mar 2017 15:43:52 +0000
Subject: [PATCH] Add HasNoContracts

---
 contracts/ownership/HasNoContracts.sol | 18 +++++++++++++
 test/HasNoContracts.js                 | 35 ++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 contracts/ownership/HasNoContracts.sol
 create mode 100644 test/HasNoContracts.js

diff --git a/contracts/ownership/HasNoContracts.sol b/contracts/ownership/HasNoContracts.sol
new file mode 100644
index 000000000..842638dc2
--- /dev/null
+++ b/contracts/ownership/HasNoContracts.sol
@@ -0,0 +1,18 @@
+pragma solidity ^0.4.8;
+
+import "./Ownable.sol";
+
+/// @title Contracts that should not own Contracts
+/// @author Remco Bloemen <remco@2π.com>
+///
+/// Should contracts (anything Ownable) end up being owned by
+/// this contract, it allows the owner of this contract to
+/// reclaim ownership of the contracts.
+contract HasNoContracts is Ownable {
+
+  /// Reclaim ownership of Ownable contracts
+  function reclaimContract(address contractAddr) external onlyOwner {
+    Ownable contractInst = Ownable(contractAddr);
+    contractInst.transferOwnership(owner);
+  }
+}
diff --git a/test/HasNoContracts.js b/test/HasNoContracts.js
new file mode 100644
index 000000000..cfe879ad4
--- /dev/null
+++ b/test/HasNoContracts.js
@@ -0,0 +1,35 @@
+'use strict';
+import expectThrow from './helpers/expectThrow';
+import toPromise from './helpers/toPromise';
+const Ownable = artifacts.require('../contracts/ownership/Ownable.sol');
+const HasNoContracts = artifacts.require(
+  '../contracts/ownership/HasNoContracts.sol',
+);
+
+contract('HasNoContracts', function(accounts) {
+  let hasNoContracts = null;
+  let ownable = null;
+
+  beforeEach(async () => {
+    // Create contract and token
+    hasNoContracts = await HasNoContracts.new();
+    ownable = await Ownable.new();
+
+    // Force ownership into contract
+    await ownable.transferOwnership(hasNoContracts.address);
+    const owner = await ownable.owner();
+    assert.equal(owner, hasNoContracts.address);
+  });
+
+  it('should allow owner to reclaim contracts', async function() {
+    await hasNoContracts.reclaimContract(ownable.address);
+    const owner = await ownable.owner();
+    assert.equal(owner, accounts[0]);
+  });
+
+  it('should allow only owner to reclaim contracts', async function() {
+    await expectThrow(
+      hasNoContracts.reclaimContract(ownable.address, {from: accounts[1]}),
+    );
+  });
+});