Merge pull request #160 from Recmo/feature/token-killable

Add TokenKillable

contracts/lifecycle/TokenKillable.sol

+pragma solidity ^0.4.8;
+
+
+import "../ownership/Ownable.sol";
+import "../token/ERC20Basic.sol";
+
+/// @title TokenKillable:
+/// @author Remco Bloemen <remco@2π.com>
+///.Base contract that can be killed by owner. All funds in contract including
+/// listed tokens will be sent to the owner
+contract TokenKillable is Ownable {
+
+  /// @notice Terminate contract and refund to owner
+  /// @param  tokens List of addresses of ERC20 or ERC20Basic token contracts to
+  //          refund
+  /// @notice The called token contracts could try to re-enter this contract.
+  //          Only supply token contracts you
+  function kill(address[] tokens) onlyOwner {
+
+    // Transfer tokens to owner
+    for(uint i = 0; i < tokens.length; i++) {
+      ERC20Basic token = ERC20Basic(tokens[i]);
+      uint256 balance = token.balanceOf(this);
+      token.transfer(owner, balance);
+    }
+
+    // Transfer Eth to owner and terminate contract
+    selfdestruct(owner);
+  }
+}

test/TokenKillable.js

+'use strict';
+
+var TokenKillable = artifacts.require('../contracts/lifecycle/TokenKillable.sol');
+var StandardTokenMock = artifacts.require("./helpers/StandardTokenMock.sol");
+require('./helpers/transactionMined.js');
+
+contract('TokenKillable', function(accounts) {
+
+  it('should send balance to owner after death', async function() {
+    let killable = await TokenKillable.new({from: accounts[0], value: web3.toWei('10','ether')});
+    let owner = await killable.owner();
+    let initBalance = web3.eth.getBalance(owner);
+    await killable.kill([], {from: owner});
+    let newBalance = web3.eth.getBalance(owner);
+    assert.isTrue(newBalance > initBalance);
+  });
+
+  it('should send tokens to owner after death', async function() {
+    let killable = await TokenKillable.new({from: accounts[0], value: web3.toWei('10','ether')});
+    let owner = await killable.owner();
+    let token = await StandardTokenMock.new(killable.address, 100);
+    let initContractBalance = await token.balanceOf(killable.address);
+    let initOwnerBalance = await token.balanceOf(owner);
+    assert.equal(initContractBalance, 100);
+    assert.equal(initOwnerBalance, 0);
+    await killable.kill([token.address], {from: owner});
+    let newContractBalance = await token.balanceOf(killable.address);
+    let newOwnerBalance = await token.balanceOf(owner);
+    assert.equal(newContractBalance, 0);
+    assert.equal(newOwnerBalance, 100);
+  });
+});