From 97e62c862df480678a414cf1d81ff60f67556c9f Mon Sep 17 00:00:00 2001
From: Barry Gitarts <bgitarts@gmail.com>
Date: Thu, 17 Oct 2019 14:13:42 -0400
Subject: [PATCH] make swap proxy pausable

---
 contracts/SwapProxy.sol       |  8 +++---
 contracts/common/Pausable.sol | 47 +++++++++++++++++++++++++++++++++++
 embarkConfig/contracts.js     |  3 ++-
 ropsten.chains.json           |  4 +++
 4 files changed, 57 insertions(+), 5 deletions(-)
 create mode 100644 contracts/common/Pausable.sol

diff --git a/contracts/SwapProxy.sol b/contracts/SwapProxy.sol
index ae7ca0e..5de9a3b 100644
--- a/contracts/SwapProxy.sol
+++ b/contracts/SwapProxy.sol
@@ -2,10 +2,10 @@ pragma solidity ^0.4.18;
 
 import "./LiquidPledging.sol";
 import "./common/SafeToken.sol";
-import "./common/Ownable.sol";
+import "./common/Pausable.sol";
 import "./IKyberSwap.sol";
 
-contract SwapProxy is Ownable, SafeToken {
+contract SwapProxy is Pausable, SafeToken {
     address public ETH;
     address public vault;
     uint public maxSlippage;
@@ -56,7 +56,7 @@ contract SwapProxy is Ownable, SafeToken {
      * @param idReceiver receiver of donation
      * @param token token to convert from ETH
      */
-    function fundWithETH(uint64 idReceiver, address token) public payable {
+    function fundWithETH(uint64 idReceiver, address token) public payable whenNotPaused {
       require(msg.value > 0);
 
       uint expectedRate;
@@ -80,7 +80,7 @@ contract SwapProxy is Ownable, SafeToken {
      * @param amount being sent
      * @param receiverToken token being converted to
      */
-    function fundWithToken(uint64 idReceiver, address token, uint amount, address receiverToken) public {
+    function fundWithToken(uint64 idReceiver, address token, uint amount, address receiverToken) public whenNotPaused {
       Error err = doTransferIn(token, msg.sender, amount);
       require(err == Error.NO_ERROR);
 
diff --git a/contracts/common/Pausable.sol b/contracts/common/Pausable.sol
new file mode 100644
index 0000000..36e4fba
--- /dev/null
+++ b/contracts/common/Pausable.sol
@@ -0,0 +1,47 @@
+pragma solidity ^0.4.18;
+
+import "./Ownable.sol";
+
+/**
+ * @title Pausable
+ * @dev Makes contract functions pausable by the owner
+ */
+contract Pausable is Ownable {
+
+    event Paused();
+    event Unpaused();
+
+    bool public paused;
+
+    function Pausable() internal {
+        paused = false;
+    }
+
+    modifier whenNotPaused() {
+        require(!paused);
+        _;
+    }
+
+    modifier whenPaused() {
+        require(paused);
+        _;
+    }
+
+    /**
+     * @dev Disables contract functions marked with "whenNotPaused" and enables the use of functions marked with "whenPaused"
+     *      Only the owner of the contract can invoke this function
+     */
+    function pause() external onlyOwner whenNotPaused {
+        paused = true;
+        Paused();
+    }
+
+    /**
+     * @dev Enables contract functions marked with "whenNotPaused" and disables the use of functions marked with "whenPaused"
+     *      Only the owner of the contract can invoke this function
+     */
+    function unpause() external onlyOwner whenPaused {
+        paused = false;
+        Unpaused();
+    }
+}
diff --git a/embarkConfig/contracts.js b/embarkConfig/contracts.js
index f625c57..d73ef6e 100644
--- a/embarkConfig/contracts.js
+++ b/embarkConfig/contracts.js
@@ -180,11 +180,12 @@ module.exports = {
         address: "0x8aA3672a99C489E5Dc5dfDb40e607bE49970cbF7"
       },
       SwapProxy: {
+        address: "0x46A30Bf6D0E438E7EeaabD6c4B5fEBf481267722",
         args: [
           '$LiquidPledging',
           "0x818E6FECD516Ecc3849DAf6845e3EC868087B755",
           "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
-          "0",
+          "0x0000000000000000000000000000000000000000",
           20
         ]
       }
diff --git a/ropsten.chains.json b/ropsten.chains.json
index 00c6353..de0b853 100644
--- a/ropsten.chains.json
+++ b/ropsten.chains.json
@@ -16,6 +16,10 @@
       "0xa9bac214a330fe3f2048f91b805d227afa147021ef497936a65911400cc3bdd5": {
         "name": "SNT",
         "address": "0x8aA3672a99C489E5Dc5dfDb40e607bE49970cbF7"
+      },
+      "0xb573e81b6da869674bb2d8448581ed758b9dbf7e72b0879087d49620167778d4": {
+        "name": "SwapProxy",
+        "address": "0x46A30Bf6D0E438E7EeaabD6c4B5fEBf481267722"
       }
     }
   }