1 files changed, 29 insertions, 3 deletions

diff --git a/contracts/Recovery.sol b/contracts/Recovery.sol
index d053594..cf708eb 100644
--- a/contracts/Recovery.sol
+++ b/contracts/Recovery.sol
@@ -3,20 +3,46 @@ pragma solidity ^0.5.0;
 import "openzeppelin-solidity/contracts/ownership/Ownable.sol";
 
 contract Recovery is Ownable {
-    uint256 depositValue;
+    uint256 public depositValue;
+
+    mapping(uint256 => address[]) public votes;
+    mapping(uint256 => mapping(address => bool)) public voted;
+    mapping(address => uint256) public withdrawable;
 
     event VotedForRecovery(uint256 indexed height, address voter);
+    event Withdrawn(address indexed owner, uint256 amount);
 
     function setDeposit(uint256 DepositValue) public onlyOwner {
         depositValue = DepositValue;
     }
 
-    function withdraw(address payable destination) public onlyOwner {
-        destination.send(address(this).balance);
+    function refund(uint256 height, uint256 value) public onlyOwner {
+        for (uint i = 0; i < votes[height].length; i++) {
+            withdrawable[votes[height][i]] += value;
+        }
+    }
+
+    function withdraw() public {
+        require(withdrawable[msg.sender] > 0);
+
+        uint256 amount = withdrawable[msg.sender];
+        withdrawable[msg.sender] = 0;
+        msg.sender.transfer(amount);
+
+        emit Withdrawn(msg.sender, amount);
     }
 
     function voteForSkipBlock(uint256 height) public payable {
         require(msg.value >= depositValue);
+        require(!voted[height][msg.sender]);
+
+        votes[height].push(msg.sender);
+        voted[height][msg.sender] = true;
+
         emit VotedForRecovery(height, msg.sender);
     }
+
+    function numVotes(uint256 height) public returns (uint256) {
+        return votes[height].length;
+    }
 }