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s4.sol

// s4 : Swarm

contract swarm {
    
    struct Member { bool exists; }
    struct Claim {
        uint unproven;
        address[] refutors;
    }
    
    uint public totalMembers;
    mapping( address => Member ) public members;
    mapping( bytes32  => Claim ) public claims;
    
    modifier onlyMember { if (members[msg.sender].exists) _ }
    
    function join() public {
        members[msg.sender].exists = true;
    }
    function claim(bytes32 mapDataIPFSHash, uint unproven) public onlyMember {
        claims[mapDataIPFSHash].unproven = unproven;
    }
    function refute(bytes32 mapDataIPFSHash) public onlyMember {
        claims[mapDataIPFSHash].refutors.push(msg.sender);
    }
    function void(bytes32 mapDataIPFSHash, address refutor, uint v, uint r, uint s) {
        
    }
}