{ "contractName": "DSThing", "abi": [ { "constant": false, "inputs": [ { "name": "owner_", "type": "address" } ], "name": "setOwner", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "authority_", "type": "address" } ], "name": "setAuthority", "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": "authority", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "anonymous": true, "inputs": [ { "indexed": true, "name": "sig", "type": "bytes4" }, { "indexed": true, "name": "guy", "type": "address" }, { "indexed": true, "name": "foo", "type": "bytes32" }, { "indexed": true, "name": "bar", "type": 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"source": "/// return median value of feeds\n\n// Copyright (C) 2017 DappHub, LLC\n\n// Licensed under the Apache License, Version 2.0 (the \"License\").\n// You may not use this file except in compliance with the License.\n\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND (express or implied).\n\npragma solidity ^0.4.8;\n\ncontract DSAuthority {\n function canCall(\n address src, address dst, bytes4 sig\n ) constant returns (bool);\n}\n\ncontract DSAuthEvents {\n event LogSetAuthority (address indexed authority);\n event LogSetOwner (address indexed owner);\n}\n\ncontract DSAuth is DSAuthEvents {\n DSAuthority public authority;\n address public owner;\n\n function DSAuth() {\n owner = msg.sender;\n LogSetOwner(msg.sender);\n }\n\n function setOwner(address owner_)\n auth\n {\n owner = owner_;\n LogSetOwner(owner);\n }\n\n function setAuthority(DSAuthority authority_)\n auth\n {\n authority = authority_;\n LogSetAuthority(authority);\n }\n\n modifier auth {\n assert(isAuthorized(msg.sender, msg.sig));\n _;\n }\n\n modifier authorized(bytes4 sig) {\n assert(isAuthorized(msg.sender, sig));\n _;\n }\n\n function isAuthorized(address src, bytes4 sig) internal returns (bool) {\n if (src == address(this)) {\n return true;\n } else if (src == owner) {\n return true;\n } else if (authority == DSAuthority(0)) {\n return false;\n } else {\n return authority.canCall(src, this, sig);\n }\n }\n\n function assert(bool x) internal {\n if (!x) throw;\n }\n}\n\ncontract DSNote {\n event LogNote(\n bytes4 indexed sig,\n address indexed guy,\n bytes32 indexed foo,\n bytes32 indexed bar,\n\tuint\t \t wad,\n bytes fax\n ) anonymous;\n\n modifier note {\n bytes32 foo;\n bytes32 bar;\n\n assembly {\n foo := calldataload(4)\n bar := calldataload(36)\n }\n\n LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data);\n\n _;\n }\n}\n\ncontract DSMath {\n\n /*\n standard uint256 functions\n */\n\n function add(uint256 x, uint256 y) constant internal returns (uint256 z) {\n assert((z = x + y) >= x);\n }\n\n function sub(uint256 x, uint256 y) constant internal returns (uint256 z) {\n assert((z = x - y) <= x);\n }\n\n function mul(uint256 x, uint256 y) constant internal returns (uint256 z) {\n assert((z = x * y) >= x);\n }\n\n function div(uint256 x, uint256 y) constant internal returns (uint256 z) {\n z = x / y;\n }\n\n function min(uint256 x, uint256 y) constant internal returns (uint256 z) {\n return x <= y ? x : y;\n }\n function max(uint256 x, uint256 y) constant internal returns (uint256 z) {\n return x >= y ? x : y;\n }\n\n /*\n uint128 functions (h is for half)\n */\n\n\n function hadd(uint128 x, uint128 y) constant internal returns (uint128 z) {\n assert((z = x + y) >= x);\n }\n\n function hsub(uint128 x, uint128 y) constant internal returns (uint128 z) {\n assert((z = x - y) <= x);\n }\n\n function hmul(uint128 x, uint128 y) constant internal returns (uint128 z) {\n assert((z = x * y) >= x);\n }\n\n function hdiv(uint128 x, uint128 y) constant internal returns (uint128 z) {\n z = x / y;\n }\n\n function hmin(uint128 x, uint128 y) constant internal returns (uint128 z) {\n return x <= y ? x : y;\n }\n function hmax(uint128 x, uint128 y) constant internal returns (uint128 z) {\n return x >= y ? x : y;\n }\n\n\n /*\n int256 functions\n */\n\n function imin(int256 x, int256 y) constant internal returns (int256 z) {\n return x <= y ? x : y;\n }\n function imax(int256 x, int256 y) constant internal returns (int256 z) {\n return x >= y ? x : y;\n }\n\n /*\n WAD math\n */\n\n uint128 constant WAD = 10 ** 18;\n\n function wadd(uint128 x, uint128 y) constant internal returns (uint128) {\n return hadd(x, y);\n }\n\n function wsub(uint128 x, uint128 y) constant internal returns (uint128) {\n return hsub(x, y);\n }\n\n function wmul(uint128 x, uint128 y) constant internal returns (uint128 z) {\n z = cast((uint256(x) * y + WAD / 2) / WAD);\n }\n\n function wdiv(uint128 x, uint128 y) constant internal returns (uint128 z) {\n z = cast((uint256(x) * WAD + y / 2) / y);\n }\n\n function wmin(uint128 x, uint128 y) constant internal returns (uint128) {\n return hmin(x, y);\n }\n function wmax(uint128 x, uint128 y) constant internal returns (uint128) {\n return hmax(x, y);\n }\n\n /*\n RAY math\n */\n\n uint128 constant RAY = 10 ** 27;\n\n function radd(uint128 x, uint128 y) constant internal returns (uint128) {\n return hadd(x, y);\n }\n\n function rsub(uint128 x, uint128 y) constant internal returns (uint128) {\n return hsub(x, y);\n }\n\n function rmul(uint128 x, uint128 y) constant internal returns (uint128 z) {\n z = cast((uint256(x) * y + RAY / 2) / RAY);\n }\n\n function rdiv(uint128 x, uint128 y) constant internal returns (uint128 z) {\n z = cast((uint256(x) * RAY + y / 2) / y);\n }\n\n function rpow(uint128 x, uint64 n) constant internal returns (uint128 z) {\n // This famous algorithm is called \"exponentiation by squaring\"\n // and calculates x^n with x as fixed-point and n as regular unsigned.\n //\n // It's O(log n), instead of O(n) for naive repeated multiplication.\n //\n // These facts are why it works:\n //\n // If n is even, then x^n = (x^2)^(n/2).\n // If n is odd, then x^n = x * x^(n-1),\n // and applying the equation for even x gives\n // x^n = x * (x^2)^((n-1) / 2).\n //\n // Also, EVM division is flooring and\n // floor[(n-1) / 2] = floor[n / 2].\n\n z = n % 2 != 0 ? x : RAY;\n\n for (n /= 2; n != 0; n /= 2) {\n x = rmul(x, x);\n\n if (n % 2 != 0) {\n z = rmul(z, x);\n }\n }\n }\n\n function rmin(uint128 x, uint128 y) constant internal returns (uint128) {\n return hmin(x, y);\n }\n function rmax(uint128 x, uint128 y) constant internal returns (uint128) {\n return hmax(x, y);\n }\n\n function cast(uint256 x) constant internal returns (uint128 z) {\n assert((z = uint128(x)) == x);\n }\n\n}\n\ncontract DSThing is DSAuth, DSNote, DSMath {\n}\n\ncontract DSValue is DSThing {\n bool has;\n bytes32 val;\n function peek() constant returns (bytes32, bool) {\n return (val,has);\n }\n function read() constant returns (bytes32) {\n var (wut, has) = peek();\n assert(has);\n return wut;\n }\n function poke(bytes32 wut) note auth {\n val = wut;\n has = true;\n }\n function void() note auth { // unset the value\n has = false;\n }\n}\n\ncontract Medianizer is DSValue {\n mapping (bytes12 => address) public values;\n mapping (address => bytes12) public indexes;\n bytes12 public next = 0x1;\n\n uint96 public min = 0x1;\n\n function set(address wat) auth {\n bytes12 nextId = bytes12(uint96(next) + 1);\n assert(nextId != 0x0);\n set(next, wat);\n next = nextId;\n }\n\n function set(bytes12 pos, address wat) note auth {\n if (pos == 0x0) throw;\n\n if (wat != 0 && indexes[wat] != 0) throw;\n\n indexes[values[pos]] = 0; // Making sure to remove a possible existing address in that position\n\n if (wat != 0) {\n indexes[wat] = pos;\n }\n\n values[pos] = wat;\n }\n\n function setMin(uint96 min_) note auth {\n if (min_ == 0x0) throw;\n min = min_;\n }\n\n function setNext(bytes12 next_) note auth {\n if (next_ == 0x0) throw;\n next = next_;\n }\n\n function unset(bytes12 pos) {\n set(pos, 0);\n }\n\n function unset(address wat) {\n set(indexes[wat], 0);\n }\n\n function poke() {\n poke(0);\n }\n\n function poke(bytes32) note {\n (val, has) = compute();\n }\n\n function compute() constant returns (bytes32, bool) {\n bytes32[] memory wuts = new bytes32[](uint96(next) - 1);\n uint96 ctr = 0;\n for (uint96 i = 1; i < uint96(next); i++) {\n if (values[bytes12(i)] != 0) {\n var (wut, wuz) = DSValue(values[bytes12(i)]).peek();\n if (wuz) {\n if (ctr == 0 || wut >= wuts[ctr - 1]) {\n wuts[ctr] = wut;\n } else {\n uint96 j = 0;\n while (wut >= wuts[j]) {\n j++;\n }\n for (uint96 k = ctr; k > j; k--) {\n wuts[k] = wuts[k - 1];\n }\n wuts[j] = wut;\n }\n ctr++;\n }\n }\n }\n\n if (ctr < min) return (val, false);\n\n bytes32 value;\n if (ctr % 2 == 0) {\n uint128 val1 = uint128(wuts[(ctr / 2) - 1]);\n uint128 val2 = uint128(wuts[ctr / 2]);\n value = bytes32(wdiv(hadd(val1, val2), 2 ether));\n } else {\n value = wuts[(ctr - 1) / 2];\n }\n\n return (value, true);\n }\n\n}\n", "sourcePath": "/Users/satyamagrawal/Repositories/testing-package/polymath-core/contracts/external/Medianizer.sol", "ast": { "absolutePath": "/Users/satyamagrawal/Repositories/testing-package/polymath-core/contracts/external/Medianizer.sol", "exportedSymbols": { "DSAuth": [ 1840 ], "DSAuthEvents": [ 1707 ], "DSAuthority": [ 1698 ], "DSMath": [ 2452 ], "DSNote": [ 1879 ], "DSThing": [ 2459 ], "DSValue": [ 2525 ], "Medianizer": [ 2911 ] }, "id": 2912, "nodeType": "SourceUnit", "nodes": [ { "id": 1686, "literals": [ "solidity", "^", "0.4", ".8" ], "nodeType": "PragmaDirective", "src": "418:23:8" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "contract", "documentation": null, "fullyImplemented": false, "id": 1698, 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"storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 1689, "name": "address", "nodeType": "ElementaryTypeName", "src": "509:7:8", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 1692, "name": "sig", "nodeType": "VariableDeclaration", "scope": 1697, "src": "522:10:8", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 1691, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "522:6:8", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": null, "visibility": "internal" } ], "src": "486:52:8" }, "payable": false, "returnParameters": { "id": 1696, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 1695, "name": "", "nodeType": "VariableDeclaration", 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