{ "contractName": "Conference", "abi": [ { "constant": true, "inputs": [], "name": "numOfAdmins", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function", "signature": "0x0191dc92" }, { "constant": false, "inputs": [ { "name": "oldAdmins", "type": "address[]" } ], "name": "revoke", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function", "signature": "0x05f203d9" }, { "constant": true, "inputs": [], "name": "name", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function", "signature": "0x06fdde03" }, { "constant": true, "inputs": [ { "name": "", "type": "address" } ], "name": "participants", "outputs": [ { "name": "index", "type": "uint256" }, { "name": "addr", "type": "address" }, { "name": "paid", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function", "signature": "0x09e69ede" }, { "constant": true, "inputs": [], 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"payable": false, "stateMutability": "view", "type": "function", "signature": "0xd0e30db0" }, { "constant": true, "inputs": [ { "name": "", "type": "uint256" } ], "name": "attendanceMaps", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function", "signature": "0xdf48f1e1" }, { "constant": false, "inputs": [ { "name": "newOwner", "type": "address" } ], "name": "transferOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function", "signature": "0xf2fde38b" }, { "inputs": [ { "name": "_name", "type": "string" }, { "name": "_deposit", "type": "uint256" }, { "name": "_limitOfParticipants", "type": "uint256" }, { "name": "_coolingPeriod", "type": "uint256" }, { "name": "_owner", "type": "address" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor", "signature": "constructor" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "addr", "type": "address" }, { "indexed": false, "name": "index", "type": "uint256" } ], "name": "RegisterEvent", "type": "event", "signature": "0x4d509eaf411f241400f13f5abf136c29e58fc43af0f27f87a1c1c9767795d03f" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "maps", "type": "uint256[]" }, { "indexed": false, "name": "payout", "type": "uint256" } ], "name": "FinalizeEvent", "type": "event", "signature": "0x627559a829b93b0f8387062aa6db5faa35dcd5916848bf5ab74ca657bc475003" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "addr", "type": "address" }, { "indexed": false, "name": "payout", "type": "uint256" } ], "name": "WithdrawEvent", "type": "event", "signature": "0x5dba113b49cfa7c90315e8e604e6b506f7abcb909b01dcb19ec39005086e68fc" }, { "anonymous": false, "inputs": [], "name": "CancelEvent", "type": "event", "signature": "0xaac5ae2dfd439bb6c2f88b2d8af5b285cfee7584ad0d13ae7c00c1226c7c4c7b" }, { "anonymous": false, "inputs": [ { "indexed": false, "name": "addr", "type": "address" }, { "indexed": false, "name": "leftOver", "type": "uint256" } ], "name": "ClearEvent", "type": "event", "signature": "0x61355a34c3bc2e502a24eba7ad2fb0fd0d05c4f71de8cb041fbe39cd3649665e" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "grantee", "type": "address" } ], "name": "AdminGranted", "type": "event", "signature": "0x1c4e23de8d72c94b22992bd4d7b6786b215ba876af214ff63e6a0ca38fc97af4" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "grantee", "type": "address" } ], "name": "AdminRevoked", "type": "event", "signature": "0x631ff1c4e1a02c54b480a34b810e03bcee61fe38efcb243930a7f820914923e2" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "previousOwner", "type": "address" }, { "indexed": true, "name": "newOwner", "type": "address" } ], "name": "OwnershipTransferred", "type": "event", "signature": "0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0" }, { "constant": false, "inputs": [], "name": "register", "outputs": [], 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"source": "pragma solidity 0.4.24;\n\nimport './GroupAdmin.sol';\n\ncontract Conference is GroupAdmin {\n string public name;\n uint256 public deposit;\n uint256 public limitOfParticipants;\n uint256 public registered;\n bool public ended;\n bool public cancelled;\n uint256 public endedAt;\n uint256 public totalAttended;\n uint256 public coolingPeriod;\n uint256 public payoutAmount;\n uint256[] public attendanceMaps;\n\n mapping (address => Participant) public participants;\n mapping (uint256 => address) public participantsIndex;\n\n struct Participant {\n uint256 index;\n address addr;\n bool paid;\n }\n\n event RegisterEvent(address addr, uint256 index);\n event FinalizeEvent(uint256[] maps, 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, 'already ended');\n _;\n }\n\n modifier noOneRegistered {\n require(registered == 0, 'people have already registered');\n _;\n }\n\n modifier onlyEnded {\n require(ended, 'not yet 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 _owner Who the owner of this contract should be\n */\n constructor (\n string _name,\n uint256 _deposit,\n uint256 _limitOfParticipants,\n uint256 _coolingPeriod,\n address _owner\n ) public {\n if (_owner != address(0)) {\n owner = _owner;\n }\n\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\n /**\n * @dev Register for the event\n */\n function register() external payable onlyActive{\n require(msg.value == deposit, 'must send exact deposit amount');\n require(registered < limitOfParticipants, 'participant limit reached');\n require(!isRegistered(msg.sender), 'already registered');\n\n registered++;\n participantsIndex[registered] = msg.sender;\n participants[msg.sender] = Participant(registered, msg.sender, false);\n\n emit RegisterEvent(msg.sender, registered);\n }\n\n\n /**\n * @dev Withdraws deposit after the event is over.\n */\n function withdraw() external onlyEnded{\n require(payoutAmount > 0, 'payout is 0');\n Participant storage participant = participants[msg.sender];\n require(participant.addr == msg.sender, 'forbidden access');\n require(cancelled || isAttended(msg.sender), 'event still active or you did not attend');\n require(participant.paid == false, 'already withdrawn');\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() public view 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) public view 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) public view returns (bool){\n if (!isRegistered(_addr) || !ended) {\n return false;\n }\n // check the attendance maps\n else {\n Participant storage p = participants[_addr];\n uint256 pIndex = p.index - 1;\n uint256 map = attendanceMaps[uint256(pIndex / 256)];\n return (0 < (map & (2 ** (pIndex % 256))));\n }\n }\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) public view returns (bool){\n return isRegistered(_addr) && participants[_addr].paid;\n }\n\n /* Admin only functions */\n\n /**\n * @dev Cancels the event by owner. When the event is canceled each participant can withdraw their deposit back.\n */\n function cancel() external onlyOwner onlyActive{\n payoutAmount = deposit;\n cancelled = true;\n ended = true;\n endedAt = now;\n emit CancelEvent();\n }\n\n /**\n * @dev The event owner transfer the outstanding deposits if there are any unclaimed deposits after cooling period\n */\n function clear() external onlyOwner onlyEnded{\n require(now > endedAt + coolingPeriod, 'still in cooling period');\n uint256 leftOver = totalBalance();\n owner.transfer(leftOver);\n emit ClearEvent(owner, leftOver);\n }\n\n /**\n * @dev Change the capacity of the event. The owner can change it until event is over.\n * @param _limitOfParticipants the number of the capacity of the event.\n */\n function setLimitOfParticipants(uint256 _limitOfParticipants) external onlyOwner onlyActive{\n limitOfParticipants = _limitOfParticipants;\n }\n\n /**\n * @dev Change the name of the event. The owner can change it as long as no one has registered yet.\n * @param _name the name of the event.\n */\n function changeName(string _name) external onlyOwner noOneRegistered{\n name = _name;\n }\n\n /**\n * @dev Mark participants as attended and enable payouts. The attendance cannot be undone.\n * @param _maps The attendance status of participants represented by uint256 values.\n */\n function finalize(uint256[] _maps) external onlyAdmin onlyActive {\n uint256 totalBits = _maps.length * 256;\n require(totalBits >= registered && totalBits - registered < 256, 'incorrect no. of bitmaps provided');\n attendanceMaps = _maps;\n ended = true;\n endedAt = now;\n uint256 _totalAttended = 0;\n // calculate total attended\n for (uint256 i = 0; i < attendanceMaps.length; i++) {\n uint256 map = attendanceMaps[i];\n // brian kerninghan bit-counting method - O(log(n))\n while (map != 0) {\n map &= (map - 1);\n _totalAttended++;\n }\n }\n // since maps can contain more bits than there are registrants, we cap the value!\n totalAttended = _totalAttended < registered ? _totalAttended : registered;\n\n if (totalAttended > 0) {\n payoutAmount = uint256(totalBalance()) / totalAttended;\n }\n\n emit FinalizeEvent(attendanceMaps, payoutAmount);\n }\n}\n", 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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 _owner Who the owner of this contract should be", "id": 183, "implemented": true, "isConstructor": true, "isDeclaredConst": false, "modifiers": [], "name": "", "nodeType": "FunctionDefinition", "parameters": { "id": 110, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 101, "name": "_name", "nodeType": "VariableDeclaration", "scope": 183, "src": "1854:12:0", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_string_memory_ptr", "typeString": "string" }, "typeName": { "id": 100, "name": "string", "nodeType": "ElementaryTypeName", "src": "1854:6:0", "typeDescriptions": { "typeIdentifier": "t_string_storage_ptr", "typeString": "string" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 103, "name": "_deposit", "nodeType": "VariableDeclaration", "scope": 183, "src": "1876:16:0", "stateVariable": false, 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This function can be deprecated when refactroing front end code.\n@return The total balance of the contract.", "id": 319, "implemented": true, "isConstructor": false, "isDeclaredConst": true, "modifiers": [], "name": "totalBalance", "nodeType": "FunctionDefinition", "parameters": { "id": 309, "nodeType": "ParameterList", "parameters": [], "src": "4000:2:0" }, "payable": false, "returnParameters": { "id": 312, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 311, "name": "", "nodeType": "VariableDeclaration", "scope": 319, "src": "4024:7:0", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 310, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "4024:7:0", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "4023:9:0" }, "scope": 608, "src": "3979:98:0", 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