{ "contractName": "RewardClaimHandler", "abi": [ { "constant": true, "inputs": [ { "name": "", "type": "address" } ], "name": "rewardAmounts", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "operator", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "guaranteedClaimEndTime", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "uint256" } ], "name": "winners", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "rewardToken", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "inputs": [ { "name": "_rewardToken", "type": "address" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "constant": false, "inputs": [ { "name": "_winners", "type": "address[]" }, { "name": "_rewardAmounts", "type": "uint256[]" }, { "name": "duration", "type": "uint256" } ], "name": "registerRewards", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [], "name": "claimReward", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [], "name": "retractRewards", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "bytecode": 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"source": "pragma solidity ^0.4.21;\n\nimport \"@gnosis.pm/util-contracts/contracts/Token.sol\";\n\ncontract RewardClaimHandler {\n Token public rewardToken;\n address public operator;\n address[] public winners;\n mapping (address => uint) public rewardAmounts;\n uint public guaranteedClaimEndTime;\n\n function RewardClaimHandler(Token _rewardToken) public {\n rewardToken = _rewardToken;\n operator = msg.sender;\n }\n\n function registerRewards(address[] _winners, uint[] _rewardAmounts, uint duration) public {\n require(\n winners.length == 0 &&\n _winners.length > 0 &&\n _winners.length == _rewardAmounts.length &&\n msg.sender == operator\n );\n\n uint totalAmount = 0;\n for(uint i = 0; i < _winners.length; i++) {\n totalAmount += _rewardAmounts[i];\n rewardAmounts[_winners[i]] = _rewardAmounts[i];\n }\n\n require(rewardToken.transferFrom(msg.sender, this, totalAmount));\n\n winners = _winners;\n guaranteedClaimEndTime = now + duration;\n }\n\n function claimReward() public {\n require(winners.length > 0 && rewardToken.transfer(msg.sender, rewardAmounts[msg.sender]));\n rewardAmounts[msg.sender] = 0;\n }\n\n function retractRewards() public {\n require(winners.length > 0 && msg.sender == operator && now >= guaranteedClaimEndTime);\n\n uint totalAmount = 0;\n for(uint i = 0; i < winners.length; i++) {\n totalAmount += rewardAmounts[winners[i]];\n rewardAmounts[winners[i]] = 0;\n // We don't use:\n // winners[i] = 0;\n // because of this:\n // https://ethereum.stackexchange.com/questions/3373/how-to-clear-large-arrays-without-blowing-the-gas-limit\n // This is a more gas efficient overall if more than one run happens\n }\n\n require(rewardToken.transfer(msg.sender, totalAmount));\n\n winners.length = 0;\n }\n}\n", "sourcePath": "/home/alan/src/github.com/gnosis/pm-apollo-contracts/contracts/RewardClaimHandler.sol", "ast": { "absolutePath": "/home/alan/src/github.com/gnosis/pm-apollo-contracts/contracts/RewardClaimHandler.sol", "exportedSymbols": { 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