{ "contractName": "UtilizationTracker", "abi": [ { "constant": false, "inputs": [ { "name": "addr", "type": "address" } ], "name": "removeAdmin", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "addr", "type": "address" } ], "name": "isAdmin", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "gran", "type": "uint256" } ], "name": "setGranularity", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [], "name": "removeSelf", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "uint256" } ], "name": "windows", "outputs": [ { "name": "windowStart", "type": "uint256" }, { "name": "utilization", "type": "uint256" } ], "payable": false, 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"source": "// ------------------------------------------------------------------------------\n// This file is part of netvote.\n//\n// netvote is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// netvote is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with solidity. If not, see \n//\n// (c) 2017 netvote contributors.\n//------------------------------------------------------------------------------\n\npragma solidity ^0.4.18;\n\nimport \"../auth/Adminable.sol\";\nimport \"zeppelin-solidity/contracts/math/SafeMath.sol\";\n\n\ncontract UtilizationTracker is Adminable {\n using SafeMath for uint256;\n\n UsageWindow[] public windows;\n uint granularity = 1 hours;\n\n struct UsageWindow {\n uint windowStart;\n uint256 utilization;\n }\n\n function UtilizationTracker() public {\n windows.push(UsageWindow({windowStart: now, utilization: 0 }));\n }\n\n function setGranularity(uint gran) public admin {\n granularity = gran;\n }\n\n function getWindowCountSince(uint256 horizon) public constant returns (uint256) {\n uint256 count = 0;\n for (uint i = windows.length; i > 0; i--) {\n uint idx = i-1;\n if (windows[idx].windowStart < horizon) {\n break;\n }\n count = count.add(1);\n }\n return count;\n }\n\n function getUtilizationSince(uint256 horizon) public constant returns (uint256) {\n uint256 util = 0;\n for (uint i = windows.length; i > 0; i--) {\n uint idx = i-1;\n if (windows[idx].windowStart < horizon) {\n break;\n }\n util = util.add(windows[idx].utilization);\n }\n return util;\n }\n\n function incrementUtilization() internal {\n uint idx = windows.length-1;\n if (windows[idx].windowStart < (now - (granularity))) {\n windows.push(UsageWindow({windowStart: now, utilization: 1}));\n } else {\n windows[idx].utilization = windows[idx].utilization.add(1);\n }\n }\n}\n", "sourcePath": "/Users/slanders/netvote/elections-solidity/contracts/stats/UtilizationTracker.sol", "ast": { "attributes": { "absolutePath": "/Users/slanders/netvote/elections-solidity/contracts/stats/UtilizationTracker.sol", "exportedSymbols": { "UtilizationTracker": [ 2390 ] } }, "children": [ { "attributes": { "literals": [ "solidity", "^", "0.4", ".18" ] }, "id": 2199, "name": "PragmaDirective", "src": "868:24:17" }, { "attributes": { "SourceUnit": 85, "absolutePath": "/Users/slanders/netvote/elections-solidity/contracts/auth/Adminable.sol", "file": "../auth/Adminable.sol", "scope": 2391, "symbolAliases": [ null ], "unitAlias": "" }, "id": 2200, "name": "ImportDirective", "src": "894:31:17" }, { "attributes": { "SourceUnit": 2648, "absolutePath": "zeppelin-solidity/contracts/math/SafeMath.sol", "file": "zeppelin-solidity/contracts/math/SafeMath.sol", "scope": 2391, "symbolAliases": [ null ], "unitAlias": "" }, "id": 2201, "name": "ImportDirective", "src": "926:55:17" }, { "attributes": { "contractDependencies": [ 84, 2703 ], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "linearizedBaseContracts": [ 2390, 84, 2703 ], "name": "UtilizationTracker", "scope": 2391 }, "children": [ { "attributes": { "arguments": [ null ] }, "children": [ { "attributes": { "contractScope": null, "name": "Adminable", "referencedDeclaration": 84, "type": "contract Adminable" }, "id": 2202, "name": "UserDefinedTypeName", "src": "1015:9:17" } ], "id": 2203, "name": "InheritanceSpecifier", "src": "1015:9:17" }, { "children": [ { "attributes": { "contractScope": null, "name": "SafeMath", "referencedDeclaration": 2647, "type": "library SafeMath" }, "id": 2204, "name": "UserDefinedTypeName", "src": "1037:8:17" }, { "attributes": { "name": "uint256", "type": "uint256" }, "id": 2205, "name": "ElementaryTypeName", "src": "1050:7:17" } ], "id": 2206, "name": "UsingForDirective", "src": "1031:27:17" }, { "attributes": { "constant": false, "name": "windows", "scope": 2390, "stateVariable": true, "storageLocation": "default", "type": "struct UtilizationTracker.UsageWindow storage ref[] storage ref", "value": null, "visibility": "public" }, "children": [ { "attributes": { "length": null, "type": "struct UtilizationTracker.UsageWindow storage ref[] storage pointer" }, "children": [ { "attributes": { "contractScope": null, "name": "UsageWindow", "referencedDeclaration": 2217, "type": "struct UtilizationTracker.UsageWindow 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