From 7c067a348262fb7a96004f97e977ae18f230c202 Mon Sep 17 00:00:00 2001
From: "Daniel A. Nagy" <nagy.da@gmail.com>
Date: Thu, 7 May 2015 18:32:04 +0200
Subject: [PATCH] Reporting mechanism implemented in part.

---
 bzz/bzzcontract/swarm.sol | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/bzz/bzzcontract/swarm.sol b/bzz/bzzcontract/swarm.sol
index 2dd3345e56..e95655647e 100644
--- a/bzz/bzzcontract/swarm.sol
+++ b/bzz/bzzcontract/swarm.sol
@@ -12,6 +12,7 @@ contract Swarm
     uint expiry;     // expiration time of the deposit
     bytes32 missing; // member accused of losing this swarm chunk
     uint deadline;   // block number before which chunk must be presented
+    address reporter; // receipt reported by this address
   }
 
   mapping (address => Bee) swarm;
@@ -106,8 +107,31 @@ contract Swarm
       Bee b = swarm[signer];
       b.missing = swarmHash;
       b.deadline = block.number + GRACE;
+      b.reporter = msg.sender;
       Report(signer);
   }
+  
+  /// @notice Present a chunk in order to avoid losing deposit.
+  ///
+  /// @param chunk chunk data
+  function presentMissingChunk(bytes chunk) external {
+      bytes32 swarmHash = sha3(chunk);
+      presentedChunks[swarmHash] = block.number;
+  }
+
+  /// @notice Determine guilty status of address `addr`.
+  /// No change in state.
+  ///
+  /// @dev Definition of guilty is failing to present missing chunk within grace period.
+  ///
+  /// @param addr queried address.
+  ///
+  /// @return true, if status is "Guilty".
+  function isGuilty(address addr) returns (bool g){
+      if(isClean(addr)) return false;
+      Bee b = swarm[addr];
+      return b.deadline < block.number;
+  }
 
   /// @notice Determine if the deposit for `addr` is unaccessible until `time`.
   /// No change in state.