@aragon/apps-payroll

{ "contractName": "PPF", "abi": [ { "constant": true, "inputs": [], "name": "operatorOwner", "outputs": [ { "name": "", "type": "address" } ], "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": "PPF_v1_ID", "outputs": [ { "name": "", "type": "bytes32" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "inputs": [ { "name": "_operator", "type": "address" }, { "name": "_operatorOwner", "type": "address" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "base", "type": "address" }, { "indexed": true, "name": "quote", "type": "address" }, { "indexed": false, "name": "xrt", "type": "uint256" }, { "indexed": false, "name": "when", "type": "uint64" } ], "name": "SetRate", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "operator", "type": "address" } ], "name": "SetOperator", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "operatorOwner", "type": "address" } ], "name": "SetOperatorOwner", "type": "event" }, { "constant": false, "inputs": [ { "name": "_operator", "type": "address" } ], "name": "setOperator", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "_operatorOwner", "type": "address" } ], "name": "setOperatorOwner", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "name": "base", "type": "address" }, { "name": "quote", "type": "address" } ], "name": "get", "outputs": [ { "name": "", "type": "uint128" }, { "name": "", "type": "uint64" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "ratePrecision", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "pure", "type": "function" }, { "constant": false, "inputs": [ { "name": "base", "type": "address" }, { "name": "quote", "type": "address" }, { "name": "xrt", "type": "uint128" }, { "name": "when", "type": "uint64" }, { "name": "sig", "type": "bytes" } ], "name": "update", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "bases", "type": "address[]" }, { "name": "quotes", "type": "address[]" }, { "name": "xrts", "type": "uint128[]" }, { "name": "whens", "type": "uint64[]" }, { "name": "sigs", "type": "bytes" } ], "name": "updateMany", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "bytecode": 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"source": "pragma solidity 0.4.24;\n\nimport \"./IFeed.sol\";\nimport \"./open-zeppelin/ECRecovery.sol\";\nimport \"@aragon/os/contracts/common/TimeHelpers.sol\";\n\n\ncontract PPF is IFeed, TimeHelpers {\n using ECRecovery for bytes32;\n\n bytes32 constant public PPF_v1_ID = 0x33a8ba7202230fa1cee2aac7bac322939edc7ba0a48b0989335a5f87a5770369; // keccak256(\"PPF-v1\");\n uint256 constant internal ONE = 10 ** 18; // 10^18 is considered 1 in the price feed to allow for decimal calculations\n\n string private constant ERROR_BAD_SIGNATURE = \"PPF_BAD_SIGNATURE\";\n string private constant ERROR_BAD_RATE_TIMESTAMP = \"PPF_BAD_RATE_TIMESTAMP\";\n string private constant ERROR_INVALID_RATE_VALUE = \"PPF_INVALID_RATE_VALUE\";\n string private constant ERROR_EQUAL_BASE_QUOTE_ADDRESSES = \"PPF_EQUAL_BASE_QUOTE_ADDRESSES\";\n string private constant ERROR_BASE_ADDRESSES_LENGTH_ZERO = \"PPF_BASE_ADDRESSES_LEN_ZERO\";\n string private constant ERROR_QUOTE_ADDRESSES_LENGTH_MISMATCH = \"PPF_QUOTE_ADDRESSES_LEN_MISMATCH\";\n string private constant ERROR_RATE_VALUES_LENGTH_MISMATCH = \"PPF_RATE_VALUES_LEN_MISMATCH\";\n string private constant ERROR_RATE_TIMESTAMPS_LENGTH_MISMATCH = \"PPF_RATE_TIMESTAMPS_LEN_MISMATCH\";\n string private constant ERROR_SIGNATURES_LENGTH_MISMATCH = \"PPF_SIGNATURES_LEN_MISMATCH\";\n string private constant ERROR_CAN_NOT_SET_OPERATOR = \"PPF_CAN_NOT_SET_OPERATOR\";\n string private constant ERROR_CAN_NOT_SET_OPERATOR_OWNER = \"PPF_CAN_NOT_SET_OPERATOR_OWNER\";\n string private constant ERROR_OPERATOR_ADDRESS_ZERO = \"PPF_OPERATOR_ADDRESS_ZERO\";\n string private constant ERROR_OPERATOR_OWNER_ADDRESS_ZERO = \"PPF_OPERATOR_OWNER_ADDRESS_ZERO\";\n\n struct Price {\n uint128 xrt;\n uint64 when;\n }\n\n address public operator;\n address public operatorOwner;\n mapping (bytes32 => Price) internal feed;\n\n event SetRate(address indexed base, address indexed quote, uint256 xrt, uint64 when);\n event SetOperator(address indexed operator);\n event SetOperatorOwner(address indexed operatorOwner);\n\n /**\n * @param _operator Public key allowed to sign messages to update the pricefeed\n * @param _operatorOwner Address of an account that can change the operator\n */\n constructor (address _operator, address _operatorOwner) public {\n _setOperator(_operator);\n _setOperatorOwner(_operatorOwner);\n }\n\n /**\n * @notice Set operator public key to `_operator`\n * @param _operator Public key allowed to sign messages to update the pricefeed\n */\n function setOperator(address _operator) external {\n // Allow the current operator to change the operator to avoid having to hassle the\n // operatorOwner in cases where a node just wants to rotate its public key\n require(msg.sender == operator || msg.sender == operatorOwner, ERROR_CAN_NOT_SET_OPERATOR);\n _setOperator(_operator);\n }\n\n /**\n * @notice Set operator owner to `_operatorOwner`\n * @param _operatorOwner Address of an account that can change the operator\n */\n function setOperatorOwner(address _operatorOwner) external {\n require(msg.sender == operatorOwner, ERROR_CAN_NOT_SET_OPERATOR_OWNER);\n _setOperatorOwner(_operatorOwner);\n }\n\n /**\n * @param base Address for the base token in the feed\n * @param quote Address for the quote token the base is denominated in\n * @return XRT for base:quote and the timestamp when it was updated\n */\n function get(address base, address quote) external view returns (uint128, uint64) {\n if (base == quote) {\n return (uint128(ONE), getTimestamp64());\n }\n\n Price storage price = feed[_pairId(base, quote)];\n\n // if never set, return 0.\n if (price.when == 0) {\n return (0, 0);\n }\n\n return (_pairXRT(base, quote, price.xrt), price.when);\n }\n\n /**\n\n * @return The minimum rate precision used for the exchange rates\n */\n function ratePrecision() external pure returns (uint256) {\n return ONE;\n }\n\n /**\n * @notice Update the price for the `base + ':' + quote` feed with an exchange rate of `xrt / ONE` for time `when`\n * @dev If the number representation of base is lower than the one for quote, and update is cheaper, as less manipulation is required.\n * @param base Address for the base token in the feed\n * @param quote Address for the quote token the base is denominated in\n * @param xrt Exchange rate for base denominated in quote. 10^18 is considered 1 to allow for decimal calculations\n * @param when Timestamp for the exchange rate value\n * @param sig Signature payload (EIP191) from operator, concatenated [ r ][ s ][v]. See _setHash function for the hash calculation.\n */\n function update(address base, address quote, uint128 xrt, uint64 when, bytes sig) public {\n bytes32 pair = _pairId(base, quote);\n\n // Ensure it is more recent than the current value (implicit check for > 0) and not a future date\n require(when > feed[pair].when && when <= getTimestamp(), ERROR_BAD_RATE_TIMESTAMP);\n require(xrt > 0, ERROR_INVALID_RATE_VALUE); // Make sure xrt is not 0, as the math would break (Dividing by 0 sucks big time)\n require(base != quote, ERROR_EQUAL_BASE_QUOTE_ADDRESSES); // Assumption that currency units are fungible and xrt should always be 1\n\n bytes32 h = _setHash(base, quote, xrt, when);\n require(h.personalRecover(sig) == operator, ERROR_BAD_SIGNATURE); // Make sure the update was signed by the operator\n\n feed[pair] = Price(_pairXRT(base, quote, xrt), when);\n\n emit SetRate(base, quote, xrt, when);\n }\n\n /**\n * @notice Update the price for many pairs\n * @dev If the number representation of bases is lower than the one for quotes, and update is cheaper, as less manipulation is required.\n * @param bases Array of addresses for the base tokens in the feed\n * @param quotes Array of addresses for the quote tokens bases are denominated in\n * @param xrts Array of the exchange rates for bases denominated in quotes. 10^18 is considered 1 to allow for decimal calculations\n * @param whens Array of timestamps for the exchange rate value\n * @param sigs Bytes array with the ordered concatenated signatures for the updates\n */\n function updateMany(address[] bases, address[] quotes, uint128[] xrts, uint64[] whens, bytes sigs) public {\n require(bases.length != 0, ERROR_BASE_ADDRESSES_LENGTH_ZERO);\n require(bases.length == quotes.length, ERROR_QUOTE_ADDRESSES_LENGTH_MISMATCH);\n require(bases.length == xrts.length, ERROR_RATE_VALUES_LENGTH_MISMATCH);\n require(bases.length == whens.length, ERROR_RATE_TIMESTAMPS_LENGTH_MISMATCH);\n require(bases.length == sigs.length / 65, ERROR_SIGNATURES_LENGTH_MISMATCH);\n require(sigs.length % 65 == 0, ERROR_SIGNATURES_LENGTH_MISMATCH);\n\n for (uint256 i = 0; i < bases.length; i++) {\n // Extract the signature for the update from the concatenated sigs\n bytes memory sig = new bytes(65);\n uint256 needle = 32 + 65 * i; // where to start copying from sigs\n assembly {\n // copy 32 bytes at a time and just the last byte at the end\n mstore(add(sig, 0x20), mload(add(sigs, needle)))\n mstore(add(sig, 0x40), mload(add(sigs, add(needle, 0x20))))\n // we have to mload the last 32 bytes of the sig, and mstore8 just gets the LSB for the word\n mstore8(add(sig, 0x60), mload(add(sigs, add(needle, 0x21))))\n }\n\n update(bases[i], quotes[i], xrts[i], whens[i], sig);\n }\n }\n\n function _setOperator(address _operator) internal {\n require(_operator != address(0), ERROR_OPERATOR_ADDRESS_ZERO);\n operator = _operator;\n emit SetOperator(_operator);\n }\n\n function _setOperatorOwner(address _operatorOwner) internal {\n require(_operatorOwner != address(0), ERROR_OPERATOR_OWNER_ADDRESS_ZERO);\n operatorOwner = _operatorOwner;\n emit SetOperatorOwner(_operatorOwner);\n }\n\n /**\n * @dev Returns a unique id for each pair, regardless of the order of base and quote\n */\n function _pairId(address base, address quote) internal pure returns (bytes32) {\n bool pairOrdered = _isPairOrdered(base, quote);\n address orderedBase = pairOrdered ? base : quote;\n address orderedQuote = pairOrdered ? quote : base;\n\n return keccak256(abi.encodePacked(orderedBase, orderedQuote));\n }\n\n /**\n * @dev Compute xrt depending on base and quote order.\n */\n function _pairXRT(address base, address quote, uint128 xrt) internal pure returns (uint128) {\n bool pairOrdered = _isPairOrdered(b