{ "contractName": "Conference", "abi": [ { "constant": true, "inputs": [], "name": "numOfAdmins", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "oldAdmins", "type": "address[]" } ], "name": "revoke", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "name", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "address" } ], "name": "participants", "outputs": [ { "name": "participantName", "type": "string" }, { "name": "addr", "type": "address" }, { "name": "attended", "type": "bool" }, { "name": "paid", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "ended", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "uint256" } ], "name": "admins", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "newAdmins", "type": "address[]" } ], "name": "grant", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "admin", "type": "address" } ], "name": "isAdmin", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "registered", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "getAdmins", "outputs": [ { "name": "", "type": "address[]" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "endedAt", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "payoutAmount", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "limitOfParticipants", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [], "name": "destroy", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "owner", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "coolingPeriod", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "cancelled", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "uint256" } ], "name": "participantsIndex", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "encryption", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "attended", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "deposit", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "newOwner", "type": "address" } ], "name": "transferOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "_recipient", "type": "address" } ], "name": "destroyAndSend", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "name": "_name", "type": "string" }, { "name": "_deposit", "type": "uint256" }, { "name": "_limitOfParticipants", "type": "uint256" }, { "name": "_coolingPeriod", "type": "uint256" }, { "name": "_encryption", "type": "string" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "addr", "type": "address" }, { "indexed": false, "name": "participantName", "type": "string" }, { "indexed": false, "name": "_encryption", "type": "string" } ], "name": "RegisterEvent", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "addr", "type": "address" } ], "name": "AttendEvent", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "_payout", "type": "uint256" } ], "name": "PaybackEvent", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "addr", "type": "address" }, { "indexed": false, "name": "_payout", "type": "uint256" } ], "name": "WithdrawEvent", "type": "event" }, { "anonymous": false, "inputs": [], "name": "CancelEvent", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "addr", "type": "address" }, { "indexed": false, "name": "leftOver", "type": "uint256" } ], "name": "ClearEvent", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "grantee", "type": "address" } ], "name": "AdminGranted", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "grantee", "type": "address" } ], "name": "AdminRevoked", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "previousOwner", "type": "address" }, { "indexed": true, "name": "newOwner", "type": "address" } ], "name": "OwnershipTransferred", "type": "event" }, { "constant": false, "inputs": [ { "name": "_participant", "type": "string" }, { "name": "_encrypted", "type": "string" } ], "name": "registerWithEncryption", "outputs": [], "payable": true, "stateMutability": "payable", "type": "function" }, { "constant": false, "inputs": [ { "name": "_participant", "type": "string" } ], "name": "register", "outputs": [], "payable": true, "stateMutability": "payable", "type": "function" }, { "constant": false, "inputs": [], "name": "withdraw", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "totalBalance", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_addr", "type": "address" } ], "name": "isRegistered", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_addr", "type": "address" } ], "name": "isAttended", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "_addr", "type": "address" } ], "name": "isPaid", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "payout", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [], "name": "payback", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [], "name": "cancel", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [], "name": "clear", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "_limitOfParticipants", "type": "uint256" } ], "name": "setLimitOfParticipants", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "_name", "type": "string" } ], "name": "changeName", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "_addresses", "type": "address[]" } ], "name": "attend", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "bytecode": 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"source": "pragma solidity 0.4.24;\n\nimport './GroupAdmin.sol';\nimport './zeppelin/lifecycle/Destructible.sol';\n\ncontract Conference is Destructible, GroupAdmin { \n string public name;\n uint256 public deposit;\n uint public limitOfParticipants;\n uint public registered;\n uint public attended;\n bool public ended;\n bool public cancelled;\n uint public endedAt;\n uint public coolingPeriod;\n uint256 public payoutAmount;\n string public encryption;\n\n mapping (address => Participant) public participants;\n mapping (uint => address) public participantsIndex;\n\n struct Participant {\n string participantName;\n address addr;\n bool attended;\n bool paid;\n }\n\n event RegisterEvent(address addr, string participantName, string _encryption);\n event AttendEvent(address addr);\n event PaybackEvent(uint256 _payout);\n event WithdrawEvent(address addr, uint256 _payout);\n event CancelEvent();\n event ClearEvent(address addr, uint256 leftOver);\n\n /* Modifiers */\n modifier onlyActive {\n require(!ended);\n _;\n }\n\n modifier noOneRegistered {\n require(registered == 0);\n _;\n }\n\n modifier onlyEnded {\n require(ended);\n _;\n }\n\n /* Public functions */\n /**\n * @dev Construcotr.\n * @param _name The name of the event\n * @param _deposit The amount each participant deposits. The default is set to 0.02 Ether. The amount cannot be changed once deployed.\n * @param _limitOfParticipants The number of participant. The default is set to 20. The number can be changed by the owner of the event.\n * @param _coolingPeriod The period participants should withdraw their deposit after the event ends. After the cooling period, the event owner can claim the remining deposits.\n * @param _encryption A pubic key. The admin can use this public key to encrypt pariticipant username which is stored in event. The admin can later decrypt the name using his/her private key.\n */\n constructor (\n string _name,\n uint256 _deposit,\n uint _limitOfParticipants,\n uint _coolingPeriod,\n string _encryption\n ) public {\n if (bytes(_name).length != 0){\n name = _name;\n } else {\n name = 'Test';\n }\n\n if(_deposit != 0){\n deposit = _deposit;\n }else{\n deposit = 0.02 ether;\n }\n\n if (_limitOfParticipants != 0){\n limitOfParticipants = _limitOfParticipants;\n }else{\n limitOfParticipants = 20;\n }\n\n if (_coolingPeriod != 0) {\n coolingPeriod = _coolingPeriod;\n } else {\n coolingPeriod = 1 weeks;\n }\n\n if (bytes(_encryption).length != 0) {\n encryption = _encryption;\n }\n }\n\n /**\n * @dev Registers with twitter name and full user name (the user name is encrypted).\n * @param _participant The twitter address of the participant\n * @param _encrypted The encrypted participant name\n */\n function registerWithEncryption(string _participant, string _encrypted) external payable onlyActive{\n registerInternal(_participant);\n emit RegisterEvent(msg.sender, _participant, _encrypted);\n }\n\n /**\n * @dev Registers with twitter name.\n * @param _participant The twitter address of the participant\n */\n function register(string _participant) external payable onlyActive{\n registerInternal(_participant);\n emit RegisterEvent(msg.sender, _participant, '');\n }\n\n /**\n * @dev The internal function to register participant\n * @param _participant The twitter address of the participant\n */\n function registerInternal(string _participant) internal {\n require(msg.value == deposit);\n require(registered < limitOfParticipants);\n require(!isRegistered(msg.sender));\n\n registered++;\n participantsIndex[registered] = msg.sender;\n participants[msg.sender] = Participant(_participant, msg.sender, false, false);\n }\n\n /**\n * @dev Withdraws deposit after the event is over.\n */\n function withdraw() external onlyEnded{\n require(payoutAmount > 0);\n Participant participant = participants[msg.sender];\n require(participant.addr == msg.sender);\n require(cancelled || participant.attended);\n require(participant.paid == false);\n\n participant.paid = true;\n participant.addr.transfer(payoutAmount);\n emit WithdrawEvent(msg.sender, payoutAmount);\n }\n\n /* Constants */\n /**\n * @dev Returns total balance of the contract. This function can be deprecated when refactroing front end code.\n * @return The total balance of the contract.\n */\n function totalBalance() view public returns (uint256){\n return address(this).balance;\n }\n\n /**\n * @dev Returns true if the given user is registered.\n * @param _addr The address of a participant.\n * @return True if the address exists in the pariticipant list.\n */\n function isRegistered(address _addr) view public returns (bool){\n return participants[_addr].addr != address(0);\n }\n\n /**\n * @dev Returns true if the given user is attended.\n * @param _addr The address of a participant.\n * @return True if the user is marked as attended by admin.\n */\n function isAttended(address _addr) view public returns (bool){\n return isRegistered(_addr) && participants[_addr].attended;\n }\n\n /**\n * @dev Returns true if the given user has withdrawn his/her deposit.\n * @param _addr The address of a participant.\n * @return True if the attendee has withdrawn his/her deposit.\n */\n function isPaid(address _addr) view public returns (bool){\n return isRegistered(_addr) && participants[_addr].paid;\n }\n\n /**\n * @dev Show the payout amount each participant can withdraw.\n * @return The amount each participant can withdraw.\n */\n function payout() view public returns(uint256){\n if (attended == 0) return 0;\n return uint(totalBalance()) / uint(attended);\n }\n\n /* Admin only functions */\n\n /**\n * @dev Ends the event by owner\n */\n function payback() external onlyOwner onlyActive{\n payoutAmount = payout();\n ended = true;\n endedAt = now;\n emit PaybackEvent(payoutAmount);\n }\n\n /**\n * @dev Cancels the event by owner. 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This function can be deprecated when refactroing front end code.\n@return The total balance of the contract.", "id": 350, "implemented": true, "isConstructor": false, "isDeclaredConst": true, "modifiers": [], "name": "totalBalance", "nodeType": "FunctionDefinition", "parameters": { "id": 340, "nodeType": "ParameterList", "parameters": [], "src": "4806:2:0" }, "payable": false, "returnParameters": { "id": 343, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 342, "name": "", "nodeType": "VariableDeclaration", "scope": 350, "src": "4830:7:0", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 341, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4830:7:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4829:9:0" }, "scope": 592, "src": "4785:98:0", 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