Merge branch 'master' of https://github.com/status-im/hackathon-registration-dapp

README.md

@@ -1,5 +1,8 @@
 # hackathon-registration-dapp
 
+### Prerequisites:
+- Geth, IPFS and Embark installed
+
 ### Installation:
 
 ```
@@ -17,7 +20,7 @@ A nodejs service was created to receive funding requests. It requires a geth lig
 1. Edit `server/config.js` and set the contract address and the private key of the controller address.
 2. `node server/main.js`
 
-### Running the dapp.
+### Running the dapp in a development environment
 0. `embark run`
 1. Browse  http://localhost:8000/index.htm?CODE_TO_REDEEM
 

contracts/SNTGiveaway.sol

@@ -83,6 +83,13 @@ contract SNTGiveaway is Controlled {
         require(SNT.transfer(msg.sender, sntBalance), "Transfer did not work");
         selfdestruct(msg.sender);
     }
+    
+    /// @notice Extract balance in ETH + SNT from the contract
+    function retrieveFunds() public onlyController {
+        uint sntBalance = SNT.balanceOf(address(this));
+        require(SNT.transfer(msg.sender, sntBalance), "Transfer did not work");
+        selfdestruct(msg.sender);
+    }
 
 
     function() public payable {

server/codegen.js

@@ -13,7 +13,7 @@ for(i = 0; i < numCodes; i++){
     const code = crypto.randomBytes(codeLength).toString('hex');
 
     codes.push(code);
-    elements.push(sha3(new Buffer(code, 'hex')));
+    elements.push(sha3(Buffer.from(code, 'hex')));
 }
 
 const merkleTree = new MerkleTree.default(elements);