{ "language": "Solidity", "sources": { "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol": { "content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\ninterface AggregatorV3Interface {\n function decimals() external view returns (uint8);\n\n function description() external view returns (string memory);\n\n function version() external view returns (uint256);\n\n function getRoundData(uint80 _roundId)\n external\n view\n returns (\n uint80 roundId,\n int256 answer,\n uint256 startedAt,\n uint256 updatedAt,\n uint80 answeredInRound\n );\n\n function latestRoundData()\n external\n view\n returns (\n uint80 roundId,\n int256 answer,\n uint256 startedAt,\n uint256 updatedAt,\n uint80 answeredInRound\n );\n}\n" }, "@openzeppelin/contracts-upgradeable/access/IAccessControlUpgradeable.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev External interface of AccessControl declared to support ERC165 detection.\n */\ninterface IAccessControlUpgradeable {\n /**\n * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`\n *\n * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite\n * {RoleAdminChanged} not being emitted signaling this.\n *\n * _Available since v3.1._\n */\n event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);\n\n /**\n * @dev Emitted when `account` is granted `role`.\n *\n * `sender` is the account that originated the contract call, an admin role\n * bearer except when using {AccessControl-_setupRole}.\n */\n event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);\n\n /**\n * @dev Emitted when `account` is revoked `role`.\n *\n * `sender` is the account that originated the contract call:\n * - if using `revokeRole`, it is the admin role bearer\n * - if using `renounceRole`, it is the role bearer (i.e. `account`)\n */\n event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);\n\n /**\n * @dev Returns `true` if `account` has been granted `role`.\n */\n function hasRole(bytes32 role, address account) external view returns (bool);\n\n /**\n * @dev Returns the admin role that controls `role`. See {grantRole} and\n * {revokeRole}.\n *\n * To change a role's admin, use {AccessControl-_setRoleAdmin}.\n */\n function getRoleAdmin(bytes32 role) external view returns (bytes32);\n\n /**\n * @dev Grants `role` to `account`.\n *\n * If `account` had not been already granted `role`, emits a {RoleGranted}\n * event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n */\n function grantRole(bytes32 role, address account) external;\n\n /**\n * @dev Revokes `role` from `account`.\n *\n * If `account` had been granted `role`, emits a {RoleRevoked} event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n */\n function revokeRole(bytes32 role, address account) external;\n\n /**\n * @dev Revokes `role` from the calling account.\n *\n * Roles are often managed via {grantRole} and {revokeRole}: this function's\n * purpose is to provide a mechanism for accounts to lose their privileges\n * if they are compromised (such as when a trusted device is misplaced).\n *\n * If the calling account had been granted `role`, emits a {RoleRevoked}\n * event.\n *\n * Requirements:\n *\n * - the caller must be `account`.\n */\n function renounceRole(bytes32 role, address account) external;\n}\n" }, "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/draft-IERC20PermitUpgradeable.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n */\ninterface IERC20PermitUpgradeable {\n /**\n * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n * given ``owner``'s signed approval.\n *\n * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n * ordering also apply here.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `deadline` must be a timestamp in the future.\n * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n * over the EIP712-formatted function arguments.\n * - the signature must use ``owner``'s current nonce (see {nonces}).\n *\n * For more information on the signature format, see the\n * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n * section].\n */\n function permit(\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external;\n\n /**\n * @dev Returns the current nonce for `owner`. This value must be\n * included whenever a signature is generated for {permit}.\n *\n * Every successful call to {permit} increases ``owner``'s nonce by one. This\n * prevents a signature from being used multiple times.\n */\n function nonces(address owner) external view returns (uint256);\n\n /**\n * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n */\n // solhint-disable-next-line func-name-mixedcase\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n" }, "@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20Upgradeable.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n *\n * _Available since v4.1._\n */\ninterface IERC20MetadataUpgradeable is IERC20Upgradeable {\n /**\n * @dev Returns the name of the token.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the symbol of the token.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the decimals places of the token.\n */\n function decimals() external view returns (uint8);\n}\n" }, "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20Upgradeable {\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `from` to `to` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) external returns (bool);\n}\n" }, "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n *\n * _Available since v4.1._\n */\ninterface IERC20Metadata is IERC20 {\n /**\n * @dev Returns the name of the token.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the symbol of the token.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the decimals places of the token.\n */\n function decimals() external view returns (uint8);\n}\n" }, "@openzeppelin/contracts/token/ERC20/IERC20.sol": { "content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `from` to `to` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) external returns (bool);\n}\n" }, "contracts/interfaces/IAsset.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\";\nimport \"../libraries/Fixed.sol\";\nimport \"./IMain.sol\";\nimport \"./IRewardable.sol\";\n\n/**\n * @title IAsset\n * @notice Supertype. Any token that interacts with our system must be wrapped in an asset,\n * whether it is used as RToken backing or not. Any token that can report a price in the UoA\n * is eligible to be an asset.\n */\ninterface IAsset is IRewardable {\n /// Refresh saved price\n /// The Reserve protocol calls this at least once per transaction, before relying on\n /// the Asset's other functions.\n /// @dev Called immediately after deployment, before use\n function refresh() external;\n\n /// Should not revert\n /// @return low {UoA/tok} The lower end of the price estimate\n /// @return high {UoA/tok} The upper end of the price estimate\n function price() external view returns (uint192 low, uint192 high);\n\n /// Should not revert\n /// lotLow should be nonzero when the asset might be worth selling\n /// @return lotLow {UoA/tok} The lower end of the lot price estimate\n /// @return lotHigh {UoA/tok} The upper end of the lot price estimate\n function lotPrice() external view returns (uint192 lotLow, uint192 lotHigh);\n\n /// @return {tok} The balance of the ERC20 in whole tokens\n function bal(address account) external view returns (uint192);\n\n /// @return The ERC20 contract of the token with decimals() available\n function erc20() external view returns (IERC20Metadata);\n\n /// @return The number of decimals in the ERC20; just for gas optimization\n function erc20Decimals() external view returns (uint8);\n\n /// @return If the asset is an instance of ICollateral or not\n function isCollateral() external view returns (bool);\n\n /// @param {UoA} The max trade volume, in UoA\n function maxTradeVolume() external view returns (uint192);\n}\n\ninterface TestIAsset is IAsset {\n function chainlinkFeed() external view returns (AggregatorV3Interface);\n}\n\n/// CollateralStatus must obey a linear ordering. That is:\n/// - being DISABLED is worse than being IFFY, or SOUND\n/// - being IFFY is worse than being SOUND.\nenum CollateralStatus {\n SOUND,\n IFFY, // When a peg is not holding or a chainlink feed is stale\n DISABLED // When the collateral has completely defaulted\n}\n\n/// Upgrade-safe maximum operator for CollateralStatus\nlibrary CollateralStatusComparator {\n /// @return Whether a is worse than b\n function worseThan(CollateralStatus a, CollateralStatus b) internal pure returns (bool) {\n return uint256(a) > uint256(b);\n }\n}\n\n/**\n * @title ICollateral\n * @notice A subtype of Asset that consists of the tokens eligible to back the RToken.\n */\ninterface ICollateral is IAsset {\n /// Emitted whenever the collateral status is changed\n /// @param newStatus The old CollateralStatus\n /// @param newStatus The updated CollateralStatus\n event CollateralStatusChanged(\n CollateralStatus indexed oldStatus,\n CollateralStatus indexed newStatus\n );\n\n /// @dev refresh()\n /// Refresh exchange rates and update default status.\n /// VERY IMPORTANT: In any valid implemntation, status() MUST become DISABLED in refresh() if\n /// refPerTok() has ever decreased since last call.\n\n /// @return The canonical name of this collateral's target unit.\n function targetName() external view returns (bytes32);\n\n /// @return The status of this collateral asset. (Is it defaulting? Might it soon?)\n function status() external view returns (CollateralStatus);\n\n // ==== Exchange Rates ====\n\n /// @return {ref/tok} Quantity of whole reference units per whole collateral tokens\n function refPerTok() external view returns (uint192);\n\n /// @return {target/ref} Quantity of whole target units per whole reference unit in the peg\n function targetPerRef() external view returns (uint192);\n}\n" }, "contracts/interfaces/IAssetRegistry.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./IAsset.sol\";\nimport \"./IComponent.sol\";\n\n/// A serialization of the AssetRegistry to be passed around in the P1 impl for gas optimization\nstruct Registry {\n IERC20[] erc20s;\n IAsset[] assets;\n}\n\n/**\n * @title IAssetRegistry\n * @notice The AssetRegistry is in charge of maintaining the ERC20 tokens eligible\n * to be handled by the rest of the system. If an asset is in the registry, this means:\n * 1. Its ERC20 contract has been vetted\n * 2. The asset is the only asset for that ERC20\n * 3. The asset can be priced in the UoA, usually via an oracle\n */\ninterface IAssetRegistry is IComponent {\n /// Emitted when an asset is added to the registry\n /// @param erc20 The ERC20 contract for the asset\n /// @param asset The asset contract added to the registry\n event AssetRegistered(IERC20 indexed erc20, IAsset indexed asset);\n\n /// Emitted when an asset is removed from the registry\n /// @param erc20 The ERC20 contract for the asset\n /// @param asset The asset contract removed from the registry\n event AssetUnregistered(IERC20 indexed erc20, IAsset indexed asset);\n\n // Initialization\n function init(IMain main_, IAsset[] memory assets_) external;\n\n /// Fully refresh all asset state\n /// @custom:interaction\n function refresh() external;\n\n /// @return The corresponding asset for ERC20, or reverts if not registered\n function toAsset(IERC20 erc20) external view returns (IAsset);\n\n /// @return The corresponding collateral, or reverts if unregistered or not collateral\n function toColl(IERC20 erc20) external view returns (ICollateral);\n\n /// @return If the ERC20 is registered\n function isRegistered(IERC20 erc20) external view returns (bool);\n\n /// @return A list of all registered ERC20s\n function erc20s() external view returns (IERC20[] memory);\n\n /// @return reg The list of registered ERC20s and Assets, in the same order\n function getRegistry() external view returns (Registry memory reg);\n\n function register(IAsset asset) external returns (bool);\n\n function swapRegistered(IAsset asset) external returns (bool swapped);\n\n function unregister(IAsset asset) external;\n}\n" }, "contracts/interfaces/IBackingManager.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./IComponent.sol\";\nimport \"./ITrading.sol\";\n\n/**\n * @title IBackingManager\n * @notice The BackingManager handles changes in the ERC20 balances that back an RToken.\n * - It computes which trades to perform, if any, and initiates these trades with the Broker.\n * - If already collateralized, excess assets are transferred to RevenueTraders.\n *\n * `manageTokens(erc20s)` and `manageTokensSortedOrder(erc20s)` are handles for getting at the\n * same underlying functionality. The former allows an ERC20 list in any order, while the\n * latter requires a sorted array, and executes in O(n) rather than O(n^2) time. In the\n * vast majority of cases we expect the the O(n^2) function to be acceptable.\n */\ninterface IBackingManager is IComponent, ITrading {\n event TradingDelaySet(uint48 indexed oldVal, uint48 indexed newVal);\n event BackingBufferSet(uint192 indexed oldVal, uint192 indexed newVal);\n\n // Initialization\n function init(\n IMain main_,\n uint48 tradingDelay_,\n uint192 backingBuffer_,\n uint192 maxTradeSlippage_,\n uint192 minTradeVolume_\n ) external;\n\n // Give RToken max allowance over a registered token\n /// @custom:refresher\n /// @custom:interaction\n function grantRTokenAllowance(IERC20) external;\n\n /// Maintain the overall backing policy; handout assets otherwise\n /// @dev Performs a uniqueness check on the erc20s list in O(n^2)\n /// @custom:interaction\n function manageTokens(IERC20[] memory erc20s) external;\n\n /// Maintain the overall backing policy; handout assets otherwise\n /// @dev Tokens must be in sorted order!\n /// @dev Performs a uniqueness check on the erc20s list in O(n)\n /// @custom:interaction\n function manageTokensSortedOrder(IERC20[] memory erc20s) external;\n}\n\ninterface TestIBackingManager is IBackingManager, TestITrading {\n function tradingDelay() external view returns (uint48);\n\n function backingBuffer() external view returns (uint192);\n\n function setTradingDelay(uint48 val) external;\n\n function setBackingBuffer(uint192 val) external;\n}\n" }, "contracts/interfaces/IBasketHandler.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"../libraries/Fixed.sol\";\nimport \"./IAsset.sol\";\nimport \"./IComponent.sol\";\n\n/**\n * @title IBasketHandler\n * @notice The BasketHandler aims to maintain a reference basket of constant target unit amounts.\n * When a collateral token defaults, a new reference basket of equal target units is set.\n * When _all_ collateral tokens default for a target unit, only then is the basket allowed to fall\n * in terms of target unit amounts. The basket is considered defaulted in this case.\n */\ninterface IBasketHandler is IComponent {\n /// Emitted when the prime basket is set\n /// @param erc20s The collateral tokens for the prime basket\n /// @param targetAmts {target/BU} A list of quantities of target unit per basket unit\n /// @param targetNames Each collateral token's targetName\n event PrimeBasketSet(IERC20[] erc20s, uint192[] targetAmts, bytes32[] targetNames);\n\n /// Emitted when the reference basket is set\n /// @param nonce The basket nonce\n /// @param erc20s The list of collateral tokens in the reference basket\n /// @param refAmts {ref/BU} The reference amounts of the basket collateral tokens\n /// @param disabled True when the list of erc20s + refAmts may not be correct\n event BasketSet(uint256 indexed nonce, IERC20[] erc20s, uint192[] refAmts, bool disabled);\n\n /// Emitted when a backup config is set for a target unit\n /// @param targetName The name of the target unit as a bytes32\n /// @param max The max number to use from `erc20s`\n /// @param erc20s The set of backup collateral tokens\n event BackupConfigSet(bytes32 indexed targetName, uint256 indexed max, IERC20[] erc20s);\n\n // Initialization\n function init(IMain main_) external;\n\n /// Set the prime basket\n /// @param erc20s The collateral tokens for the new prime basket\n /// @param targetAmts The target amounts (in) {target/BU} for the new prime basket\n /// required range: 1e9 values; absolute range irrelevant.\n /// @custom:governance\n function setPrimeBasket(IERC20[] memory erc20s, uint192[] memory targetAmts) external;\n\n /// Set the backup configuration for a given target\n /// @param targetName The name of the target as a bytes32\n /// @param max The maximum number of collateral tokens to use from this target\n /// Required range: 1-255\n /// @param erc20s A list of ordered backup collateral tokens\n /// @custom:governance\n function setBackupConfig(\n bytes32 targetName,\n uint256 max,\n IERC20[] calldata erc20s\n ) external;\n\n /// Default the basket in order to schedule a basket refresh\n /// @custom:protected\n function disableBasket() external;\n\n /// Governance-controlled setter to cause a basket switch explicitly\n /// @custom:governance\n /// @custom:interaction\n function refreshBasket() external;\n\n /// @return If the BackingManager has sufficient collateral to redeem the entire RToken supply\n function fullyCollateralized() external view returns (bool);\n\n /// @return status The worst CollateralStatus of all collateral in the basket\n function status() external view returns (CollateralStatus status);\n\n /// @param erc20 The ERC20 token contract for the asset\n /// @return {tok/BU} The whole token quantity of token in the reference basket\n /// Returns 0 if erc20 is not registered or not in the basket\n /// Returns FIX_MAX (in lieu of +infinity) if Collateral.refPerTok() is 0.\n /// Otherwise, returns (token's basket.refAmts / token's Collateral.refPerTok())\n function quantity(IERC20 erc20) external view returns (uint192);\n\n /// Like quantity(), but unsafe because it DOES NOT CONFIRM THAT THE ASSET IS CORRECT\n /// @param erc20 The ERC20 token contract for the asset\n /// @param asset The registered asset plugin contract for the erc20\n /// @return {tok/BU} The whole token quantity of token in the reference basket\n /// Returns 0 if erc20 is not registered or not in the basket\n /// Returns FIX_MAX (in lieu of +infinity) if Collateral.refPerTok() is 0.\n /// Otherwise, returns (token's basket.refAmts / token's Collateral.refPerTok())\n function quantityUnsafe(IERC20 erc20, IAsset asset) external view returns (uint192);\n\n /// @param amount {BU}\n /// @return erc20s The addresses of the ERC20 tokens in the reference basket\n /// @return quantities {qTok} The quantity of each ERC20 token to issue `amount` baskets\n function quote(uint192 amount, RoundingMode rounding)\n external\n view\n returns (address[] memory erc20s, uint256[] memory quantities);\n\n /// @return baskets {BU} The quantity of complete baskets at an address. A balance for BUs\n function basketsHeldBy(address account) external view returns (uint192 baskets);\n\n /// Should not revert\n /// @return low {UoA/BU} The lower end of the price estimate\n /// @return high {UoA/BU} The upper end of the price estimate\n function price() external view returns (uint192 low, uint192 high);\n\n /// Should not revert\n /// lotLow should be nonzero if a BU could be worth selling\n /// @return lotLow {UoA/tok} The lower end of the lot price estimate\n /// @return lotHigh {UoA/tok} The upper end of the lot price estimate\n function lotPrice() external view returns (uint192 lotLow, uint192 lotHigh);\n\n /// @return timestamp The timestamp at which the basket was last set\n function timestamp() external view returns (uint48);\n}\n" }, "contracts/interfaces/IBroker.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"./IAsset.sol\";\nimport \"./IComponent.sol\";\nimport \"./IGnosis.sol\";\nimport \"./ITrade.sol\";\n\n/// The data format that describes a request for trade with the Broker\nstruct TradeRequest {\n IAsset sell;\n IAsset buy;\n uint256 sellAmount; // {qSellTok}\n uint256 minBuyAmount; // {qBuyTok}\n}\n\n/**\n * @title IBroker\n * @notice The Broker deploys oneshot Trade contracts for Traders and monitors\n * the continued proper functioning of trading platforms.\n */\ninterface IBroker is IComponent {\n event AuctionLengthSet(uint48 indexed oldVal, uint48 indexed newVal);\n event DisabledSet(bool indexed prevVal, bool indexed newVal);\n\n // Initialization\n function init(\n IMain main_,\n IGnosis gnosis_,\n ITrade tradeImplementation_,\n uint48 auctionLength_\n ) external;\n\n /// Request a trade from the broker\n /// @dev Requires setting an allowance in advance\n /// @custom:interaction\n function openTrade(TradeRequest memory req) external returns (ITrade);\n\n /// Only callable by one of the trading contracts the broker deploys\n function reportViolation() external;\n\n function disabled() external view returns (bool);\n}\n\ninterface TestIBroker is IBroker {\n function gnosis() external view returns (IGnosis);\n\n function auctionLength() external view returns (uint48);\n\n function setAuctionLength(uint48 newAuctionLength) external;\n\n function setDisabled(bool disabled_) external;\n}\n" }, "contracts/interfaces/IComponent.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"./IMain.sol\";\nimport \"./IVersioned.sol\";\n\n/**\n * @title IComponent\n * @notice A Component is the central building block of all our system contracts. Components\n * contain important state that must be migrated during upgrades, and they delegate\n * their ownership to Main's owner.\n */\ninterface IComponent is IVersioned {\n function main() external view returns (IMain);\n}\n" }, "contracts/interfaces/IDistributor.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./IComponent.sol\";\n\nstruct RevenueShare {\n uint16 rTokenDist; // {revShare} A value between [0, 10,000]\n uint16 rsrDist; // {revShare} A value between [0, 10,000]\n}\n\n/// Assumes no more than 1024 independent distributions.\nstruct RevenueTotals {\n uint24 rTokenTotal; // {revShare}\n uint24 rsrTotal; // {revShare}\n}\n\n/**\n * @title IDistributor\n * @notice The Distributor Component maintains a revenue distribution table that dictates\n * how to divide revenue across the Furnace, StRSR, and any other destinations.\n */\ninterface IDistributor is IComponent {\n /// Emitted when a distribution is set\n /// @param dest The address set to receive the distribution\n /// @param rTokenDist The distribution of RToken that should go to `dest`\n /// @param rsrDist The distribution of RSR that should go to `dest`\n event DistributionSet(address dest, uint16 rTokenDist, uint16 rsrDist);\n\n /// Emitted when revenue is distributed\n /// @param erc20 The token being distributed, either RSR or the RToken itself\n /// @param source The address providing the revenue\n /// @param amount The amount of the revenue\n event RevenueDistributed(IERC20 indexed erc20, address indexed source, uint256 indexed amount);\n\n // Initialization\n function init(IMain main_, RevenueShare memory dist) external;\n\n /// @custom:governance\n function setDistribution(address dest, RevenueShare memory share) external;\n\n /// Distribute the `erc20` token across all revenue destinations\n /// @custom:interaction\n function distribute(IERC20 erc20, uint256 amount) external;\n\n /// @return revTotals The total of all destinations\n function totals() external view returns (RevenueTotals memory revTotals);\n}\n\ninterface TestIDistributor is IDistributor {\n // solhint-disable-next-line func-name-mixedcase\n function FURNACE() external view returns (address);\n\n // solhint-disable-next-line func-name-mixedcase\n function ST_RSR() external view returns (address);\n\n /// @return rTokenDist The RToken distribution for the address\n /// @return rsrDist The RSR distribution for the address\n function distribution(address) external view returns (uint16 rTokenDist, uint16 rsrDist);\n}\n" }, "contracts/interfaces/IFurnace.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"../libraries/Fixed.sol\";\nimport \"./IComponent.sol\";\n\n/**\n * @title IFurnace\n * @notice A helper contract to burn RTokens slowly and permisionlessly.\n */\ninterface IFurnace is IComponent {\n // Initialization\n function init(IMain main_, uint192 ratio_) external;\n\n /// Emitted when the melting ratio is changed\n /// @param oldRatio The old ratio\n /// @param newRatio The new ratio\n event RatioSet(uint192 indexed oldRatio, uint192 indexed newRatio);\n\n function ratio() external view returns (uint192);\n\n /// Needed value range: [0, 1], granularity 1e-9\n /// @custom:governance\n function setRatio(uint192) external;\n\n /// Performs any RToken melting that has vested since the last payout.\n /// @custom:refresher\n function melt() external;\n}\n\ninterface TestIFurnace is IFurnace {\n function lastPayout() external view returns (uint256);\n\n function lastPayoutBal() external view returns (uint256);\n}\n" }, "contracts/interfaces/IGnosis.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\n\nstruct GnosisAuctionData {\n IERC20 auctioningToken;\n IERC20 biddingToken;\n uint256 orderCancellationEndDate;\n uint256 auctionEndDate;\n bytes32 initialAuctionOrder;\n uint256 minimumBiddingAmountPerOrder;\n uint256 interimSumBidAmount;\n bytes32 interimOrder;\n bytes32 clearingPriceOrder;\n uint96 volumeClearingPriceOrder;\n bool minFundingThresholdNotReached;\n bool isAtomicClosureAllowed;\n uint256 feeNumerator;\n uint256 minFundingThreshold;\n}\n\n/// The relevant portion of the interface of the live Gnosis EasyAuction contract\n/// https://github.com/gnosis/ido-contracts/blob/main/contracts/EasyAuction.sol\ninterface IGnosis {\n function initiateAuction(\n IERC20 auctioningToken,\n IERC20 biddingToken,\n uint256 orderCancellationEndDate,\n uint256 auctionEndDate,\n uint96 auctionedSellAmount,\n uint96 minBuyAmount,\n uint256 minimumBiddingAmountPerOrder,\n uint256 minFundingThreshold,\n bool isAtomicClosureAllowed,\n address accessManagerContract,\n bytes memory accessManagerContractData\n ) external returns (uint256 auctionId);\n\n function auctionData(uint256 auctionId) external view returns (GnosisAuctionData memory);\n\n /// @param auctionId The external auction id\n /// @dev See here for decoding: https://git.io/JMang\n /// @return encodedOrder The order, encoded in a bytes 32\n function settleAuction(uint256 auctionId) external returns (bytes32 encodedOrder);\n\n /// @return The numerator over a 1000-valued denominator\n function feeNumerator() external returns (uint256);\n}\n" }, "contracts/interfaces/IMain.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts-upgradeable/access/IAccessControlUpgradeable.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./IAssetRegistry.sol\";\nimport \"./IBasketHandler.sol\";\nimport \"./IBackingManager.sol\";\nimport \"./IBroker.sol\";\nimport \"./IGnosis.sol\";\nimport \"./IFurnace.sol\";\nimport \"./IDistributor.sol\";\nimport \"./IRToken.sol\";\nimport \"./IRevenueTrader.sol\";\nimport \"./IStRSR.sol\";\nimport \"./ITrading.sol\";\nimport \"./IVersioned.sol\";\n\n// === Auth roles ===\n\nbytes32 constant OWNER = bytes32(bytes(\"OWNER\"));\nbytes32 constant SHORT_FREEZER = bytes32(bytes(\"SHORT_FREEZER\"));\nbytes32 constant LONG_FREEZER = bytes32(bytes(\"LONG_FREEZER\"));\nbytes32 constant PAUSER = bytes32(bytes(\"PAUSER\"));\n\n/**\n * Main is a central hub that maintains a list of Component contracts.\n *\n * Components:\n * - perform a specific function\n * - defer auth to Main\n * - usually (but not always) contain sizeable state that require a proxy\n */\nstruct Components {\n // Definitely need proxy\n IRToken rToken;\n IStRSR stRSR;\n IAssetRegistry assetRegistry;\n IBasketHandler basketHandler;\n IBackingManager backingManager;\n IDistributor distributor;\n IFurnace furnace;\n IBroker broker;\n IRevenueTrader rsrTrader;\n IRevenueTrader rTokenTrader;\n}\n\ninterface IAuth is IAccessControlUpgradeable {\n /// Emitted when `unfreezeAt` is changed\n /// @param oldVal The old value of `unfreezeAt`\n /// @param newVal The new value of `unfreezeAt`\n event UnfreezeAtSet(uint48 indexed oldVal, uint48 indexed newVal);\n\n /// Emitted when the short freeze duration governance param is changed\n /// @param oldDuration The old short freeze duration\n /// @param newDuration The new short freeze duration\n event ShortFreezeDurationSet(uint48 indexed oldDuration, uint48 indexed newDuration);\n\n /// Emitted when the long freeze duration governance param is changed\n /// @param oldDuration The old long freeze duration\n /// @param newDuration The new long freeze duration\n event LongFreezeDurationSet(uint48 indexed oldDuration, uint48 indexed newDuration);\n\n /// Emitted when the system is paused or unpaused\n /// @param oldVal The old value of `paused`\n /// @param newVal The new value of `paused`\n event PausedSet(bool indexed oldVal, bool indexed newVal);\n\n /**\n * Paused: Disable everything except for OWNER actions and RToken.redeem/cancel\n * Frozen: Disable everything except for OWNER actions\n */\n\n function pausedOrFrozen() external view returns (bool);\n\n function frozen() external view returns (bool);\n\n function shortFreeze() external view returns (uint48);\n\n function longFreeze() external view returns (uint48);\n\n // ====\n\n // onlyRole(OWNER)\n function freezeForever() external;\n\n // onlyRole(SHORT_FREEZER)\n function freezeShort() external;\n\n // onlyRole(LONG_FREEZER)\n function freezeLong() external;\n\n // onlyRole(OWNER)\n function unfreeze() external;\n\n function pause() external;\n\n function unpause() external;\n}\n\ninterface IComponentRegistry {\n // === Component setters/getters ===\n\n event RTokenSet(IRToken indexed oldVal, IRToken indexed newVal);\n\n function rToken() external view returns (IRToken);\n\n event StRSRSet(IStRSR indexed oldVal, IStRSR indexed newVal);\n\n function stRSR() external view returns (IStRSR);\n\n event AssetRegistrySet(IAssetRegistry indexed oldVal, IAssetRegistry indexed newVal);\n\n function assetRegistry() external view returns (IAssetRegistry);\n\n event BasketHandlerSet(IBasketHandler indexed oldVal, IBasketHandler indexed newVal);\n\n function basketHandler() external view returns (IBasketHandler);\n\n event BackingManagerSet(IBackingManager indexed oldVal, IBackingManager indexed newVal);\n\n function backingManager() external view returns (IBackingManager);\n\n event DistributorSet(IDistributor indexed oldVal, IDistributor indexed newVal);\n\n function distributor() external view returns (IDistributor);\n\n event RSRTraderSet(IRevenueTrader indexed oldVal, IRevenueTrader indexed newVal);\n\n function rsrTrader() external view returns (IRevenueTrader);\n\n event RTokenTraderSet(IRevenueTrader indexed oldVal, IRevenueTrader indexed newVal);\n\n function rTokenTrader() external view returns (IRevenueTrader);\n\n event FurnaceSet(IFurnace indexed oldVal, IFurnace indexed newVal);\n\n function furnace() external view returns (IFurnace);\n\n event BrokerSet(IBroker indexed oldVal, IBroker indexed newVal);\n\n function broker() external view returns (IBroker);\n}\n\n/**\n * @title IMain\n * @notice The central hub for the entire system. Maintains components and an owner singleton role\n */\ninterface IMain is IVersioned, IAuth, IComponentRegistry {\n function poke() external; // not used in p1\n\n // === Initialization ===\n\n event MainInitialized();\n\n function init(\n Components memory components,\n IERC20 rsr_,\n uint48 shortFreeze_,\n uint48 longFreeze_\n ) external;\n\n function rsr() external view returns (IERC20);\n}\n\ninterface TestIMain is IMain {\n /// @custom:governance\n function setShortFreeze(uint48) external;\n\n /// @custom:governance\n function setLongFreeze(uint48) external;\n\n function shortFreeze() external view returns (uint48);\n\n function longFreeze() external view returns (uint48);\n\n function longFreezes(address account) external view returns (uint256);\n\n function paused() external view returns (bool);\n}\n" }, "contracts/interfaces/IRevenueTrader.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"./IComponent.sol\";\nimport \"./ITrading.sol\";\n\n/**\n * @title IRevenueTrader\n * @notice The RevenueTrader is an extension of the trading mixin that trades all\n * assets at its address for a single target asset. There are two runtime instances\n * of the RevenueTrader, 1 for RToken and 1 for RSR.\n */\ninterface IRevenueTrader is IComponent, ITrading {\n // Initialization\n function init(\n IMain main_,\n IERC20 tokenToBuy_,\n uint192 maxTradeSlippage_,\n uint192 minTradeVolume_\n ) external;\n\n /// Processes a single token; unpermissioned\n /// @dev Intended to be used with multicall\n /// @custom:interaction\n function manageToken(IERC20 sell) external;\n}\n\n// solhint-disable-next-line no-empty-blocks\ninterface TestIRevenueTrader is IRevenueTrader, TestITrading {\n function tokenToBuy() external view returns (IERC20);\n}\n" }, "contracts/interfaces/IRewardable.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./IComponent.sol\";\nimport \"./IMain.sol\";\n\n/**\n * @title IRewardable\n * @notice A simple interface mixin to support claiming of rewards.\n */\ninterface IRewardable {\n /// Emitted whenever a reward token balance is claimed\n event RewardsClaimed(IERC20 indexed erc20, uint256 indexed amount);\n\n /// Claim rewards earned by holding a balance of the ERC20 token\n /// Must emit `RewardsClaimed` for each token rewards are claimed for\n /// @dev delegatecall: there be dragons here!\n /// @custom:interaction\n function claimRewards() external;\n}\n\n/**\n * @title IRewardableComponent\n * @notice A simple interface mixin to support claiming of rewards.\n */\ninterface IRewardableComponent is IRewardable {\n /// Claim rewards for a single ERC20\n /// Must emit `RewardsClaimed` for each token rewards are claimed for\n /// @dev delegatecall: there be dragons here!\n /// @custom:interaction\n function claimRewardsSingle(IERC20 erc20) external;\n}\n" }, "contracts/interfaces/IRToken.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol\";\n// solhint-disable-next-line max-line-length\nimport \"@openzeppelin/contracts-upgradeable/token/ERC20/extensions/draft-IERC20PermitUpgradeable.sol\";\nimport \"../libraries/Fixed.sol\";\nimport \"../libraries/Throttle.sol\";\nimport \"./IAsset.sol\";\nimport \"./IComponent.sol\";\nimport \"./IMain.sol\";\nimport \"./IRewardable.sol\";\n\n/**\n * @title IRToken\n * @notice An RToken is an ERC20 that is permissionlessly issuable/redeemable and tracks an\n * exchange rate against a single unit: baskets, or {BU} in our type notation.\n */\ninterface IRToken is IComponent, IERC20MetadataUpgradeable, IERC20PermitUpgradeable {\n /// Emitted when an issuance of RToken occurs, whether it occurs via slow minting or not\n /// @param issuer The address holding collateral tokens\n /// @param recipient The address of the recipient of the RTokens\n /// @param amount The quantity of RToken being issued\n /// @param baskets The corresponding number of baskets\n event Issuance(\n address indexed issuer,\n address indexed recipient,\n uint256 indexed amount,\n uint192 baskets\n );\n\n /// Emitted when a redemption of RToken occurs\n /// @param redeemer The address holding RToken\n /// @param recipient The address of the account receiving the backing collateral tokens\n /// @param amount The quantity of RToken being redeemed\n /// @param baskets The corresponding number of baskets\n /// @param amount {qRTok} The amount of RTokens canceled\n event Redemption(\n address indexed redeemer,\n address indexed recipient,\n uint256 indexed amount,\n uint192 baskets\n );\n\n /// Emitted when the number of baskets needed changes\n /// @param oldBasketsNeeded Previous number of baskets units needed\n /// @param newBasketsNeeded New number of basket units needed\n event BasketsNeededChanged(uint192 oldBasketsNeeded, uint192 newBasketsNeeded);\n\n /// Emitted when RToken is melted, i.e the RToken supply is decreased but basketsNeeded is not\n /// @param amount {qRTok}\n event Melted(uint256 amount);\n\n /// Emitted when issuance SupplyThrottle params are set\n event IssuanceThrottleSet(ThrottleLib.Params oldVal, ThrottleLib.Params newVal);\n\n /// Emitted when redemption SupplyThrottle params are set\n event RedemptionThrottleSet(ThrottleLib.Params oldVal, ThrottleLib.Params newVal);\n\n // Initialization\n function init(\n IMain main_,\n string memory name_,\n string memory symbol_,\n string memory mandate_,\n ThrottleLib.Params calldata issuanceThrottleParams,\n ThrottleLib.Params calldata redemptionThrottleParams\n ) external;\n\n /// Issue an RToken with basket collateral\n /// @param amount {qRTok} The quantity of RToken to issue\n /// @custom:interaction\n function issue(uint256 amount) external;\n\n /// Issue an RToken with basket collateral, to a particular recipient\n /// @param recipient The address to receive the issued RTokens\n /// @param amount {qRTok} The quantity of RToken to issue\n /// @custom:interaction\n function issueTo(address recipient, uint256 amount) external;\n\n /// Redeem RToken for basket collateral\n /// @param amount {qRTok} The quantity {qRToken} of RToken to redeem\n /// @param revertOnPartialRedemption If true, will revert on partial redemption\n /// @custom:interaction\n function redeem(uint256 amount, bool revertOnPartialRedemption) external;\n\n /// Redeem RToken for basket collateral to a particular recipient\n /// @param recipient The address to receive the backing collateral tokens\n /// @param amount {qRTok} The quantity {qRToken} of RToken to redeem\n /// @param revertOnPartialRedemption If true, will revert on partial redemption\n /// @custom:interaction\n function redeemTo(\n address recipient,\n uint256 amount,\n bool revertOnPartialRedemption\n ) external;\n\n /// Mints a quantity of RToken to the `recipient`, callable only by the BackingManager\n /// @param recipient The recipient of the newly minted RToken\n /// @param amount {qRTok} The amount to be minted\n /// @custom:protected\n function mint(address recipient, uint256 amount) external;\n\n /// Melt a quantity of RToken from the caller's account\n /// @param amount {qRTok} The amount to be melted\n function melt(uint256 amount) external;\n\n /// Set the number of baskets needed directly, callable only by the BackingManager\n /// @param basketsNeeded {BU} The number of baskets to target\n /// needed range: pretty interesting\n /// @custom:protected\n function setBasketsNeeded(uint192 basketsNeeded) external;\n\n /// @return {BU} How many baskets are being targeted\n function basketsNeeded() external view returns (uint192);\n\n /// @return {qRTok} The maximum issuance that can be performed in the current block\n function issuanceAvailable() external view returns (uint256);\n\n /// @return {qRTok} The maximum redemption that can be performed in the current block\n function redemptionAvailable() external view returns (uint256);\n}\n\ninterface TestIRToken is IRToken {\n function setIssuanceThrottleParams(ThrottleLib.Params calldata) external;\n\n function setRedemptionThrottleParams(ThrottleLib.Params calldata) external;\n\n function issuanceThrottleParams() external view returns (ThrottleLib.Params memory);\n\n function redemptionThrottleParams() external view returns (ThrottleLib.Params memory);\n\n function increaseAllowance(address, uint256) external returns (bool);\n\n function decreaseAllowance(address, uint256) external returns (bool);\n\n function monetizeDonations(IERC20) external;\n}\n" }, "contracts/interfaces/IStRSR.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol\";\n// solhint-disable-next-line max-line-length\nimport \"@openzeppelin/contracts-upgradeable/token/ERC20/extensions/draft-IERC20PermitUpgradeable.sol\";\nimport \"../libraries/Fixed.sol\";\nimport \"./IComponent.sol\";\nimport \"./IMain.sol\";\n\n/**\n * @title IStRSR\n * @notice An ERC20 token representing shares of the RSR over-collateralization pool.\n *\n * StRSR permits the BackingManager to take RSR in times of need. In return, the BackingManager\n * benefits the StRSR pool with RSR rewards purchased with a portion of its revenue.\n *\n * In the absence of collateral default or losses due to slippage, StRSR should have a\n * monotonically increasing exchange rate with respect to RSR, meaning that over time\n * StRSR is redeemable for more RSR. It is non-rebasing.\n */\ninterface IStRSR is IERC20MetadataUpgradeable, IERC20PermitUpgradeable, IComponent {\n /// Emitted when RSR is staked\n /// @param era The era at time of staking\n /// @param staker The address of the staker\n /// @param rsrAmount {qRSR} How much RSR was staked\n /// @param stRSRAmount {qStRSR} How much stRSR was minted by this staking\n event Staked(\n uint256 indexed era,\n address indexed staker,\n uint256 rsrAmount,\n uint256 indexed stRSRAmount\n );\n\n /// Emitted when an unstaking is started\n /// @param draftId The id of the draft.\n /// @param draftEra The era of the draft.\n /// @param staker The address of the unstaker\n /// The triple (staker, draftEra, draftId) is a unique ID\n /// @param rsrAmount {qRSR} How much RSR this unstaking will be worth, absent seizures\n /// @param stRSRAmount {qStRSR} How much stRSR was burned by this unstaking\n event UnstakingStarted(\n uint256 indexed draftId,\n uint256 indexed draftEra,\n address indexed staker,\n uint256 rsrAmount,\n uint256 stRSRAmount,\n uint256 availableAt\n );\n\n /// Emitted when RSR is unstaked\n /// @param firstId The beginning of the range of draft IDs withdrawn in this transaction\n /// @param endId The end of range of draft IDs withdrawn in this transaction\n /// (ID i was withdrawn if firstId <= i < endId)\n /// @param draftEra The era of the draft.\n /// The triple (staker, draftEra, id) is a unique ID among drafts\n /// @param staker The address of the unstaker\n\n /// @param rsrAmount {qRSR} How much RSR this unstaking was worth\n event UnstakingCompleted(\n uint256 indexed firstId,\n uint256 indexed endId,\n uint256 draftEra,\n address indexed staker,\n uint256 rsrAmount\n );\n\n /// Emitted whenever the exchange rate changes\n event ExchangeRateSet(uint192 indexed oldVal, uint192 indexed newVal);\n\n /// Emitted whenever RSR are paids out\n event RewardsPaid(uint256 indexed rsrAmt);\n\n /// Emitted if all the RSR in the staking pool is seized and all balances are reset to zero.\n event AllBalancesReset(uint256 indexed newEra);\n /// Emitted if all the RSR in the unstakin pool is seized, and all ongoing unstaking is voided.\n event AllUnstakingReset(uint256 indexed newEra);\n\n event UnstakingDelaySet(uint48 indexed oldVal, uint48 indexed newVal);\n event RewardPeriodSet(uint48 indexed oldVal, uint48 indexed newVal);\n event RewardRatioSet(uint192 indexed oldVal, uint192 indexed newVal);\n\n // Initialization\n function init(\n IMain main_,\n string memory name_,\n string memory symbol_,\n uint48 unstakingDelay_,\n uint192 rewardRatio_\n ) external;\n\n /// Gather and payout rewards from rsrTrader\n /// @custom:interaction\n function payoutRewards() external;\n\n /// Stakes an RSR `amount` on the corresponding RToken to earn yield and over-collateralized\n /// the system\n /// @param amount {qRSR}\n /// @custom:interaction\n function stake(uint256 amount) external;\n\n /// Begins a delayed unstaking for `amount` stRSR\n /// @param amount {qStRSR}\n /// @custom:interaction\n function unstake(uint256 amount) external;\n\n /// Complete delayed unstaking for the account, up to (but not including!) `endId`\n /// @custom:interaction\n function withdraw(address account, uint256 endId) external;\n\n /// Seize RSR, only callable by main.backingManager()\n /// @custom:protected\n function seizeRSR(uint256 amount) external;\n\n /// Return the maximum valid value of endId such that withdraw(endId) should immediately work\n function endIdForWithdraw(address account) external view returns (uint256 endId);\n\n /// @return {qRSR/qStRSR} The exchange rate between RSR and StRSR\n function exchangeRate() external view returns (uint192);\n}\n\ninterface TestIStRSR is IStRSR {\n function rewardRatio() external view returns (uint192);\n\n function setRewardRatio(uint192) external;\n\n function unstakingDelay() external view returns (uint48);\n\n function setUnstakingDelay(uint48) external;\n\n function increaseAllowance(address, uint256) external returns (bool);\n\n function decreaseAllowance(address, uint256) external returns (bool);\n\n /// @return {qStRSR/qRSR} The exchange rate between StRSR and RSR\n function exchangeRate() external view returns (uint192);\n}\n" }, "contracts/interfaces/ITrade.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\";\n\n/**\n * Simple generalized trading interface for all Trade contracts to obey\n *\n * Usage: if (canSettle()) settle()\n */\ninterface ITrade {\n function sell() external view returns (IERC20Metadata);\n\n function buy() external view returns (IERC20Metadata);\n\n /// @return The timestamp at which the trade is projected to become settle-able\n function endTime() external view returns (uint48);\n\n /// @return True if the trade can be settled\n /// @dev Should be guaranteed to be true eventually as an invariant\n function canSettle() external view returns (bool);\n\n /// Complete the trade and transfer tokens back to the origin trader\n /// @return soldAmt {qSellTok} The quantity of tokens sold\n /// @return boughtAmt {qBuyTok} The quantity of tokens bought\n function settle() external returns (uint256 soldAmt, uint256 boughtAmt);\n}\n" }, "contracts/interfaces/ITrading.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"../libraries/Fixed.sol\";\nimport \"./IAsset.sol\";\nimport \"./IComponent.sol\";\nimport \"./ITrade.sol\";\nimport \"./IRewardable.sol\";\n\n/**\n * @title ITrading\n * @notice Common events and refresher function for all Trading contracts\n */\ninterface ITrading is IComponent, IRewardableComponent {\n event MaxTradeSlippageSet(uint192 indexed oldVal, uint192 indexed newVal);\n event MinTradeVolumeSet(uint192 indexed oldVal, uint192 indexed newVal);\n\n /// Emitted when a trade is started\n /// @param trade The one-time-use trade contract that was just deployed\n /// @param sell The token to sell\n /// @param buy The token to buy\n /// @param sellAmount {qSellTok} The quantity of the selling token\n /// @param minBuyAmount {qBuyTok} The minimum quantity of the buying token to accept\n event TradeStarted(\n ITrade indexed trade,\n IERC20 indexed sell,\n IERC20 indexed buy,\n uint256 sellAmount,\n uint256 minBuyAmount\n );\n\n /// Emitted after a trade ends\n /// @param trade The one-time-use trade contract\n /// @param sell The token to sell\n /// @param buy The token to buy\n /// @param sellAmount {qSellTok} The quantity of the token sold\n /// @param buyAmount {qBuyTok} The quantity of the token bought\n event TradeSettled(\n ITrade indexed trade,\n IERC20 indexed sell,\n IERC20 indexed buy,\n uint256 sellAmount,\n uint256 buyAmount\n );\n\n /// Settle a single trade, expected to be used with multicall for efficient mass settlement\n /// @custom:refresher\n function settleTrade(IERC20 sell) external;\n\n /// @return {%} The maximum trade slippage acceptable\n function maxTradeSlippage() external view returns (uint192);\n\n /// @return {UoA} The minimum trade volume in UoA, applies to all assets\n function minTradeVolume() external view returns (uint192);\n\n /// @return The ongoing trade for a sell token, or the zero address\n function trades(IERC20 sell) external view returns (ITrade);\n\n /// Light wrapper around FixLib.mulDiv to support try-catch\n function mulDivCeil(\n uint192 x,\n uint192 y,\n uint192 z\n ) external pure returns (uint192);\n}\n\ninterface TestITrading is ITrading {\n /// @custom:governance\n function setMaxTradeSlippage(uint192 val) external;\n\n /// @custom:governance\n function setMinTradeVolume(uint192 val) external;\n\n /// @return The number of ongoing trades open\n function tradesOpen() external view returns (uint48);\n}\n" }, "contracts/interfaces/IVersioned.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\ninterface IVersioned {\n function version() external view returns (string memory);\n}\n" }, "contracts/libraries/Fixed.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\n// solhint-disable func-name-mixedcase func-visibility\npragma solidity ^0.8.17;\n\n/// @title FixedPoint, a fixed-point arithmetic library defining the custom type uint192\n/// @author Matt Elder and the Reserve Team \n\n/** The logical type `uint192 ` is a 192 bit value, representing an 18-decimal Fixed-point\n fractional value. This is what's described in the Solidity documentation as\n \"fixed192x18\" -- a value represented by 192 bits, that makes 18 digits available to\n the right of the decimal point.\n\n The range of values that uint192 can represent is about [-1.7e20, 1.7e20].\n Unless a function explicitly says otherwise, it will fail on overflow.\n To be clear, the following should hold:\n toFix(0) == 0\n toFix(1) == 1e18\n*/\n\n// Analysis notes:\n// Every function should revert iff its result is out of bounds.\n// Unless otherwise noted, when a rounding mode is given, that mode is applied to\n// a single division that may happen as the last step in the computation.\n// Unless otherwise noted, when a rounding mode is *not* given but is needed, it's FLOOR.\n// For each, we comment:\n// - @return is the value expressed in \"value space\", where uint192(1e18) \"is\" 1.0\n// - as-ints: is the value expressed in \"implementation space\", where uint192(1e18) \"is\" 1e18\n// The \"@return\" expression is suitable for actually using the library\n// The \"as-ints\" expression is suitable for testing\n\n// A uint value passed to this library was out of bounds for uint192 operations\nerror UIntOutOfBounds();\nbytes32 constant UIntOutofBoundsHash = keccak256(abi.encodeWithSignature(\"UIntOutOfBounds()\"));\n\n// Used by P1 implementation for easier casting\nuint256 constant FIX_ONE_256 = 1e18;\nuint8 constant FIX_DECIMALS = 18;\n\n// If a particular uint192 is represented by the uint192 n, then the uint192 represents the\n// value n/FIX_SCALE.\nuint64 constant FIX_SCALE = 1e18;\n\n// FIX_SCALE Squared:\nuint128 constant FIX_SCALE_SQ = 1e36;\n\n// The largest integer that can be converted to uint192 .\n// This is a bit bigger than 3.1e39\nuint192 constant FIX_MAX_INT = type(uint192).max / FIX_SCALE;\n\nuint192 constant FIX_ZERO = 0; // The uint192 representation of zero.\nuint192 constant FIX_ONE = FIX_SCALE; // The uint192 representation of one.\nuint192 constant FIX_MAX = type(uint192).max; // The largest uint192. (Not an integer!)\nuint192 constant FIX_MIN = 0; // The smallest uint192.\n\n/// An enum that describes a rounding approach for converting to ints\nenum RoundingMode {\n FLOOR, // Round towards zero\n ROUND, // Round to the nearest int\n CEIL // Round away from zero\n}\n\nRoundingMode constant FLOOR = RoundingMode.FLOOR;\nRoundingMode constant ROUND = RoundingMode.ROUND;\nRoundingMode constant CEIL = RoundingMode.CEIL;\n\n/* @dev Solidity 0.8.x only allows you to change one of type or size per type conversion.\n Thus, all the tedious-looking double conversions like uint256(uint256 (foo))\n See: https://docs.soliditylang.org/en/v0.8.17/080-breaking-changes.html#new-restrictions\n */\n\n/// Explicitly convert a uint256 to a uint192. Revert if the input is out of bounds.\nfunction _safeWrap(uint256 x) pure returns (uint192) {\n if (FIX_MAX < x) revert UIntOutOfBounds();\n return uint192(x);\n}\n\n/// Convert a uint to its Fix representation.\n/// @return x\n// as-ints: x * 1e18\nfunction toFix(uint256 x) pure returns (uint192) {\n return _safeWrap(x * FIX_SCALE);\n}\n\n/// Convert a uint to its fixed-point representation, and left-shift its value `shiftLeft`\n/// decimal digits.\n/// @return x * 10**shiftLeft\n// as-ints: x * 10**(shiftLeft + 18)\nfunction shiftl_toFix(uint256 x, int8 shiftLeft) pure returns (uint192) {\n return shiftl_toFix(x, shiftLeft, FLOOR);\n}\n\n/// @return x * 10**shiftLeft\n// as-ints: x * 10**(shiftLeft + 18)\nfunction shiftl_toFix(\n uint256 x,\n int8 shiftLeft,\n RoundingMode rounding\n) pure returns (uint192) {\n // conditions for avoiding overflow\n if (x == 0) return 0;\n if (shiftLeft <= -96) return (rounding == CEIL ? 1 : 0); // 0 < uint.max / 10**77 < 0.5\n if (40 <= shiftLeft) revert UIntOutOfBounds(); // 10**56 < FIX_MAX < 10**57\n\n shiftLeft += 18;\n\n uint256 coeff = 10**abs(shiftLeft);\n uint256 shifted = (shiftLeft >= 0) ? x * coeff : _divrnd(x, coeff, rounding);\n\n return _safeWrap(shifted);\n}\n\n/// Divide a uint by a uint192, yielding a uint192\n/// This may also fail if the result is MIN_uint192! not fixing this for optimization's sake.\n/// @return x / y\n// as-ints: x * 1e36 / y\nfunction divFix(uint256 x, uint192 y) pure returns (uint192) {\n // If we didn't have to worry about overflow, we'd just do `return x * 1e36 / _y`\n // If it's safe to do this operation the easy way, do it:\n if (x < uint256(type(uint256).max / FIX_SCALE_SQ)) {\n return _safeWrap(uint256(x * FIX_SCALE_SQ) / y);\n } else {\n return _safeWrap(mulDiv256(x, FIX_SCALE_SQ, y));\n }\n}\n\n/// Divide a uint by a uint, yielding a uint192\n/// @return x / y\n// as-ints: x * 1e18 / y\nfunction divuu(uint256 x, uint256 y) pure returns (uint192) {\n return _safeWrap(mulDiv256(FIX_SCALE, x, y));\n}\n\n/// @return min(x,y)\n// as-ints: min(x,y)\nfunction fixMin(uint192 x, uint192 y) pure returns (uint192) {\n return x < y ? x : y;\n}\n\n/// @return max(x,y)\n// as-ints: max(x,y)\nfunction fixMax(uint192 x, uint192 y) pure returns (uint192) {\n return x > y ? x : y;\n}\n\n/// @return absoluteValue(x,y)\n// as-ints: absoluteValue(x,y)\nfunction abs(int256 x) pure returns (uint256) {\n return x < 0 ? uint256(-x) : uint256(x);\n}\n\n/// Divide two uints, returning a uint, using rounding mode `rounding`.\n/// @return numerator / divisor\n// as-ints: numerator / divisor\nfunction _divrnd(\n uint256 numerator,\n uint256 divisor,\n RoundingMode rounding\n) pure returns (uint256) {\n uint256 result = numerator / divisor;\n\n if (rounding == FLOOR) return result;\n\n if (rounding == ROUND) {\n if (numerator % divisor > (divisor - 1) / 2) {\n result++;\n }\n } else {\n if (numerator % divisor > 0) {\n result++;\n }\n }\n\n return result;\n}\n\nlibrary FixLib {\n /// Again, all arithmetic functions fail if and only if the result is out of bounds.\n\n /// Convert this fixed-point value to a uint. Round towards zero if needed.\n /// @return x\n // as-ints: x / 1e18\n function toUint(uint192 x) internal pure returns (uint136) {\n return toUint(x, FLOOR);\n }\n\n /// Convert this uint192 to a uint\n /// @return x\n // as-ints: x / 1e18 with rounding\n function toUint(uint192 x, RoundingMode rounding) internal pure returns (uint136) {\n return uint136(_divrnd(uint256(x), FIX_SCALE, rounding));\n }\n\n /// Return the uint192 shifted to the left by `decimal` digits\n /// (Similar to a bitshift but in base 10)\n /// @return x * 10**decimals\n // as-ints: x * 10**decimals\n function shiftl(uint192 x, int8 decimals) internal pure returns (uint192) {\n return shiftl(x, decimals, FLOOR);\n }\n\n /// Return the uint192 shifted to the left by `decimal` digits\n /// (Similar to a bitshift but in base 10)\n /// @return x * 10**decimals\n // as-ints: x * 10**decimals\n function shiftl(\n uint192 x,\n int8 decimals,\n RoundingMode rounding\n ) internal pure returns (uint192) {\n // Handle overflow cases\n if (x == 0) return 0;\n if (decimals <= -59) return (rounding == CEIL ? 1 : 0); // 59, because 1e58 > 2**192\n if (58 <= decimals) revert UIntOutOfBounds(); // 58, because x * 1e58 > 2 ** 192 if x != 0\n\n uint256 coeff = uint256(10**abs(decimals));\n return _safeWrap(decimals >= 0 ? x * coeff : _divrnd(x, coeff, rounding));\n }\n\n /// Add a uint192 to this uint192\n /// @return x + y\n // as-ints: x + y\n function plus(uint192 x, uint192 y) internal pure returns (uint192) {\n return x + y;\n }\n\n /// Add a uint to this uint192\n /// @return x + y\n // as-ints: x + y*1e18\n function plusu(uint192 x, uint256 y) internal pure returns (uint192) {\n return _safeWrap(x + y * FIX_SCALE);\n }\n\n /// Subtract a uint192 from this uint192\n /// @return x - y\n // as-ints: x - y\n function minus(uint192 x, uint192 y) internal pure returns (uint192) {\n return x - y;\n }\n\n /// Subtract a uint from this uint192\n /// @return x - y\n // as-ints: x - y*1e18\n function minusu(uint192 x, uint256 y) internal pure returns (uint192) {\n return _safeWrap(uint256(x) - uint256(y * FIX_SCALE));\n }\n\n /// Multiply this uint192 by a uint192\n /// Round truncated values to the nearest available value. 5e-19 rounds away from zero.\n /// @return x * y\n // as-ints: x * y/1e18 [division using ROUND, not FLOOR]\n function mul(uint192 x, uint192 y) internal pure returns (uint192) {\n return mul(x, y, ROUND);\n }\n\n /// Multiply this uint192 by a uint192\n /// @return x * y\n // as-ints: x * y/1e18\n function mul(\n uint192 x,\n uint192 y,\n RoundingMode rounding\n ) internal pure returns (uint192) {\n return _safeWrap(_divrnd(uint256(x) * uint256(y), FIX_SCALE, rounding));\n }\n\n /// Multiply this uint192 by a uint\n /// @return x * y\n // as-ints: x * y\n function mulu(uint192 x, uint256 y) internal pure returns (uint192) {\n return _safeWrap(x * y);\n }\n\n /// Divide this uint192 by a uint192\n /// @return x / y\n // as-ints: x * 1e18 / y\n function div(uint192 x, uint192 y) internal pure returns (uint192) {\n return div(x, y, FLOOR);\n }\n\n /// Divide this uint192 by a uint192\n /// @return x / y\n // as-ints: x * 1e18 / y\n function div(\n uint192 x,\n uint192 y,\n RoundingMode rounding\n ) internal pure returns (uint192) {\n // Multiply-in FIX_SCALE before dividing by y to preserve precision.\n return _safeWrap(_divrnd(uint256(x) * FIX_SCALE, y, rounding));\n }\n\n /// Divide this uint192 by a uint\n /// @return x / y\n // as-ints: x / y\n function divu(uint192 x, uint256 y) internal pure returns (uint192) {\n return divu(x, y, FLOOR);\n }\n\n /// Divide this uint192 by a uint\n /// @return x / y\n // as-ints: x / y\n function divu(\n uint192 x,\n uint256 y,\n RoundingMode rounding\n ) internal pure returns (uint192) {\n return _safeWrap(_divrnd(x, y, rounding));\n }\n\n uint64 constant FIX_HALF = uint64(FIX_SCALE) / 2;\n\n /// Raise this uint192 to a nonnegative integer power. Requires that x_ <= FIX_ONE\n /// Gas cost is O(lg(y)), precision is +- 1e-18.\n /// @return x_ ** y\n // as-ints: x_ ** y / 1e18**(y-1) <- technically correct for y = 0. :D\n function powu(uint192 x_, uint48 y) internal pure returns (uint192) {\n require(x_ <= FIX_ONE);\n if (y == 1) return x_;\n if (x_ == FIX_ONE || y == 0) return FIX_ONE;\n uint256 x = uint256(x_) * FIX_SCALE; // x is D36\n uint256 result = FIX_SCALE_SQ; // result is D36\n while (true) {\n if (y & 1 == 1) result = (result * x + FIX_SCALE_SQ / 2) / FIX_SCALE_SQ;\n if (y <= 1) break;\n y = (y >> 1);\n x = (x * x + FIX_SCALE_SQ / 2) / FIX_SCALE_SQ;\n }\n return _safeWrap(result / FIX_SCALE);\n }\n\n /// Comparison operators...\n function lt(uint192 x, uint192 y) internal pure returns (bool) {\n return x < y;\n }\n\n function lte(uint192 x, uint192 y) internal pure returns (bool) {\n return x <= y;\n }\n\n function gt(uint192 x, uint192 y) internal pure returns (bool) {\n return x > y;\n }\n\n function gte(uint192 x, uint192 y) internal pure returns (bool) {\n return x >= y;\n }\n\n function eq(uint192 x, uint192 y) internal pure returns (bool) {\n return x == y;\n }\n\n function neq(uint192 x, uint192 y) internal pure returns (bool) {\n return x != y;\n }\n\n /// Return whether or not this uint192 is less than epsilon away from y.\n /// @return |x - y| < epsilon\n // as-ints: |x - y| < epsilon\n function near(\n uint192 x,\n uint192 y,\n uint192 epsilon\n ) internal pure returns (bool) {\n uint192 diff = x <= y ? y - x : x - y;\n return diff < epsilon;\n }\n\n // ================ Chained Operations ================\n // The operation foo_bar() always means:\n // Do foo() followed by bar(), and overflow only if the _end_ result doesn't fit in an uint192\n\n /// Shift this uint192 left by `decimals` digits, and convert to a uint\n /// @return x * 10**decimals\n // as-ints: x * 10**(decimals - 18)\n function shiftl_toUint(uint192 x, int8 decimals) internal pure returns (uint256) {\n return shiftl_toUint(x, decimals, FLOOR);\n }\n\n /// Shift this uint192 left by `decimals` digits, and convert to a uint.\n /// @return x * 10**decimals\n // as-ints: x * 10**(decimals - 18)\n function shiftl_toUint(\n uint192 x,\n int8 decimals,\n RoundingMode rounding\n ) internal pure returns (uint256) {\n // Handle overflow cases\n if (x == 0) return 0; // always computable, no matter what decimals is\n if (decimals <= -42) return (rounding == CEIL ? 1 : 0);\n if (96 <= decimals) revert UIntOutOfBounds();\n\n decimals -= 18; // shift so that toUint happens at the same time.\n\n uint256 coeff = uint256(10**abs(decimals));\n return decimals >= 0 ? uint256(x * coeff) : uint256(_divrnd(x, coeff, rounding));\n }\n\n /// Multiply this uint192 by a uint, and output the result as a uint\n /// @return x * y\n // as-ints: x * y / 1e18\n function mulu_toUint(uint192 x, uint256 y) internal pure returns (uint256) {\n return mulDiv256(uint256(x), y, FIX_SCALE);\n }\n\n /// Multiply this uint192 by a uint, and output the result as a uint\n /// @return x * y\n // as-ints: x * y / 1e18\n function mulu_toUint(\n uint192 x,\n uint256 y,\n RoundingMode rounding\n ) internal pure returns (uint256) {\n return mulDiv256(uint256(x), y, FIX_SCALE, rounding);\n }\n\n /// Multiply this uint192 by a uint192 and output the result as a uint\n /// @return x * y\n // as-ints: x * y / 1e36\n function mul_toUint(uint192 x, uint192 y) internal pure returns (uint256) {\n return mulDiv256(uint256(x), uint256(y), FIX_SCALE_SQ);\n }\n\n /// Multiply this uint192 by a uint192 and output the result as a uint\n /// @return x * y\n // as-ints: x * y / 1e36\n function mul_toUint(\n uint192 x,\n uint192 y,\n RoundingMode rounding\n ) internal pure returns (uint256) {\n return mulDiv256(uint256(x), uint256(y), FIX_SCALE_SQ, rounding);\n }\n\n /// Compute x * y / z avoiding intermediate overflow\n /// @dev Only use if you need to avoid overflow; costlier than x * y / z\n /// @return x * y / z\n // as-ints: x * y / z\n function muluDivu(\n uint192 x,\n uint256 y,\n uint256 z\n ) internal pure returns (uint192) {\n return muluDivu(x, y, z, FLOOR);\n }\n\n /// Compute x * y / z, avoiding intermediate overflow\n /// @dev Only use if you need to avoid overflow; costlier than x * y / z\n /// @return x * y / z\n // as-ints: x * y / z\n function muluDivu(\n uint192 x,\n uint256 y,\n uint256 z,\n RoundingMode rounding\n ) internal pure returns (uint192) {\n return _safeWrap(mulDiv256(x, y, z, rounding));\n }\n\n /// Compute x * y / z on Fixes, avoiding intermediate overflow\n /// @dev Only use if you need to avoid overflow; costlier than x * y / z\n /// @return x * y / z\n // as-ints: x * y / z\n function mulDiv(\n uint192 x,\n uint192 y,\n uint192 z\n ) internal pure returns (uint192) {\n return mulDiv(x, y, z, FLOOR);\n }\n\n /// Compute x * y / z on Fixes, avoiding intermediate overflow\n /// @dev Only use if you need to avoid overflow; costlier than x * y / z\n /// @return x * y / z\n // as-ints: x * y / z\n function mulDiv(\n uint192 x,\n uint192 y,\n uint192 z,\n RoundingMode rounding\n ) internal pure returns (uint192) {\n return _safeWrap(mulDiv256(x, y, z, rounding));\n }\n}\n\n// ================ a couple pure-uint helpers================\n// as-ints comments are omitted here, because they're the same as @return statements, because\n// these are all pure uint functions\n\n/// Return (x*y/z), avoiding intermediate overflow.\n// Adapted from sources:\n// https://medium.com/coinmonks/4db014e080b1, https://medium.com/wicketh/afa55870a65\n// and quite a few of the other excellent \"Mathemagic\" posts from https://medium.com/wicketh\n/// @dev Only use if you need to avoid overflow; costlier than x * y / z\n/// @return result x * y / z\nfunction mulDiv256(\n uint256 x,\n uint256 y,\n uint256 z\n) pure returns (uint256 result) {\n unchecked {\n (uint256 hi, uint256 lo) = fullMul(x, y);\n if (hi >= z) revert UIntOutOfBounds();\n uint256 mm = mulmod(x, y, z);\n if (mm > lo) hi -= 1;\n lo -= mm;\n uint256 pow2 = z & (0 - z);\n z /= pow2;\n lo /= pow2;\n lo += hi * ((0 - pow2) / pow2 + 1);\n uint256 r = 1;\n r *= 2 - z * r;\n r *= 2 - z * r;\n r *= 2 - z * r;\n r *= 2 - z * r;\n r *= 2 - z * r;\n r *= 2 - z * r;\n r *= 2 - z * r;\n r *= 2 - z * r;\n result = lo * r;\n }\n}\n\n/// Return (x*y/z), avoiding intermediate overflow.\n/// @dev Only use if you need to avoid overflow; costlier than x * y / z\n/// @return x * y / z\nfunction mulDiv256(\n uint256 x,\n uint256 y,\n uint256 z,\n RoundingMode rounding\n) pure returns (uint256) {\n uint256 result = mulDiv256(x, y, z);\n if (rounding == FLOOR) return result;\n\n uint256 mm = mulmod(x, y, z);\n if (rounding == CEIL) {\n if (mm > 0) result += 1;\n } else {\n if (mm > ((z - 1) / 2)) result += 1; // z should be z-1\n }\n return result;\n}\n\n/// Return (x*y) as a \"virtual uint512\" (lo, hi), representing (hi*2**256 + lo)\n/// Adapted from sources:\n/// https://medium.com/wicketh/27650fec525d, https://medium.com/coinmonks/4db014e080b1\n/// @dev Intended to be internal to this library\n/// @return hi (hi, lo) satisfies hi*(2**256) + lo == x * y\n/// @return lo (paired with `hi`)\nfunction fullMul(uint256 x, uint256 y) pure returns (uint256 hi, uint256 lo) {\n unchecked {\n uint256 mm = mulmod(x, y, uint256(0) - uint256(1));\n lo = x * y;\n hi = mm - lo;\n if (mm < lo) hi -= 1;\n }\n}\n" }, "contracts/libraries/Throttle.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"./Fixed.sol\";\n\nuint48 constant ONE_HOUR = 3600; // {seconds/hour}\n\n/**\n * @title ThrottleLib\n * A library that implements a usage throttle that can be used to ensure net issuance\n * or net redemption for an RToken never exceeds some bounds per unit time (hour).\n *\n * It is expected for the RToken to use this library with two instances, one for issuance\n * and one for redemption. Issuance causes the available redemption amount to increase, and\n * visa versa.\n */\nlibrary ThrottleLib {\n using FixLib for uint192;\n\n struct Params {\n uint256 amtRate; // {qRTok/hour} a quantity of RToken hourly; cannot be 0\n uint192 pctRate; // {1/hour} a fraction of RToken hourly; can be 0\n }\n\n struct Throttle {\n // === Gov params ===\n Params params;\n // === Cache ===\n uint48 lastTimestamp; // {seconds}\n uint256 lastAvailable; // {qRTok}\n }\n\n /// Reverts if usage amount exceeds available amount\n /// @param supply {qRTok} Total RToken supply beforehand\n /// @param amount {qRTok} Amount of RToken to use. Should be negative for the issuance\n /// throttle during redemption and for the redemption throttle during issuance.\n function useAvailable(\n Throttle storage throttle,\n uint256 supply,\n int256 amount\n ) internal {\n // untestable: amtRate will always be greater > 0 due to previous validations\n if (throttle.params.amtRate == 0 && throttle.params.pctRate == 0) return;\n\n // Calculate hourly limit\n uint256 limit = hourlyLimit(throttle, supply); // {qRTok}\n\n // Calculate available amount before supply change\n uint256 available = currentlyAvailable(throttle, limit);\n\n // Calculate available amount after supply change\n if (amount > 0) {\n require(uint256(amount) <= available, \"supply change throttled\");\n available -= uint256(amount);\n // untestable: the final else statement, amount will never be 0\n } else if (amount < 0) {\n available += uint256(-amount);\n }\n\n // Update cached values\n throttle.lastAvailable = available;\n throttle.lastTimestamp = uint48(block.timestamp);\n }\n\n /// @param limit {qRTok/hour} The hourly limit\n /// @return available {qRTok} Amount currently available for consumption\n function currentlyAvailable(Throttle storage throttle, uint256 limit)\n internal\n view\n returns (uint256 available)\n {\n uint48 delta = uint48(block.timestamp) - throttle.lastTimestamp; // {seconds}\n available = throttle.lastAvailable + (limit * delta) / ONE_HOUR;\n if (available > limit) available = limit;\n }\n\n /// @return limit {qRTok} The hourly limit\n function hourlyLimit(Throttle storage throttle, uint256 supply)\n internal\n view\n returns (uint256 limit)\n {\n Params storage params = throttle.params;\n\n // Calculate hourly limit as: max(params.amtRate, supply.mul(params.pctRate))\n limit = (supply * params.pctRate) / FIX_ONE_256; // {qRTok}\n if (params.amtRate > limit) limit = params.amtRate;\n }\n}\n" }, "contracts/plugins/assets/AppreciatingFiatCollateral.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\";\nimport \"../../interfaces/IAsset.sol\";\nimport \"../../libraries/Fixed.sol\";\nimport \"./FiatCollateral.sol\";\nimport \"./Asset.sol\";\nimport \"./OracleLib.sol\";\n\n/**\n * @title AppreciatingFiatCollateral\n * Collateral that may need revenue hiding to become truly \"up only\"\n *\n * For: {tok} != {ref}, {ref} != {target}, {target} == {UoA}\n * Inheritors _must_ implement _underlyingRefPerTok()\n * Can be easily extended by (optionally) re-implementing:\n * - tryPrice()\n * - refPerTok()\n * - targetPerRef()\n * - claimRewards()\n * Should not have to re-implement any other methods.\n *\n * Can intentionally disable default checks by setting config.defaultThreshold to 0\n * Can intentionally do no revenue hiding by setting revenueHiding to 0\n */\nabstract contract AppreciatingFiatCollateral is FiatCollateral {\n using FixLib for uint192;\n using OracleLib for AggregatorV3Interface;\n\n // revenueShowing = FIX_ONE.minus(revenueHiding)\n uint192 public immutable revenueShowing; // {1} The maximum fraction of refPerTok to show\n\n // does not become nonzero until after first refresh()\n uint192 public exposedReferencePrice; // {ref/tok} max ref price observed, sub revenue hiding\n\n /// @param config.chainlinkFeed Feed units: {UoA/ref}\n /// @param revenueHiding {1} A value like 1e-6 that represents the maximum refPerTok to hide\n constructor(CollateralConfig memory config, uint192 revenueHiding) FiatCollateral(config) {\n require(revenueHiding < FIX_ONE, \"revenueHiding out of range\");\n revenueShowing = FIX_ONE.minus(revenueHiding);\n }\n\n /// Can revert, used by other contract functions in order to catch errors\n /// Should not return FIX_MAX for low\n /// Should only return FIX_MAX for high if low is 0\n /// @dev Override this when pricing is more complicated than just a single oracle\n /// @param low {UoA/tok} The low price estimate\n /// @param high {UoA/tok} The high price estimate\n /// @param pegPrice {target/ref} The actual price observed in the peg\n function tryPrice()\n external\n view\n virtual\n override\n returns (\n uint192 low,\n uint192 high,\n uint192 pegPrice\n )\n {\n // Should include revenue hiding discount in the low discount but not high\n\n pegPrice = chainlinkFeed.price(oracleTimeout); // {target/ref}\n\n // {UoA/tok} = {target/ref} * {ref/tok} * {UoA/target} (1)\n uint192 pLow = pegPrice.mul(refPerTok());\n\n // {UoA/tok} = {target/ref} * {ref/tok} * {UoA/target} (1)\n uint192 pHigh = pegPrice.mul(_underlyingRefPerTok());\n\n low = pLow - pLow.mul(oracleError);\n high = pHigh + pHigh.mul(oracleError);\n }\n\n /// Should not revert\n /// Refresh exchange rates and update default status.\n /// @dev Should not need to override: can handle collateral with variable refPerTok()\n function refresh() public virtual override {\n if (alreadyDefaulted()) {\n // continue to update rates\n exposedReferencePrice = _underlyingRefPerTok().mul(revenueShowing);\n return;\n }\n\n CollateralStatus oldStatus = status();\n\n // Check for hard default\n // must happen before tryPrice() call since `refPerTok()` returns a stored value\n\n // revenue hiding: do not DISABLE if drawdown is small\n uint192 underlyingRefPerTok = _underlyingRefPerTok();\n\n // {ref/tok} = {ref/tok} * {1}\n uint192 hiddenReferencePrice = underlyingRefPerTok.mul(revenueShowing);\n\n // uint192(<) is equivalent to Fix.lt\n if (underlyingRefPerTok < exposedReferencePrice) {\n exposedReferencePrice = hiddenReferencePrice;\n markStatus(CollateralStatus.DISABLED);\n } else if (hiddenReferencePrice > exposedReferencePrice) {\n exposedReferencePrice = hiddenReferencePrice;\n }\n\n // Check for soft default + save prices\n try this.tryPrice() returns (uint192 low, uint192 high, uint192 pegPrice) {\n // {UoA/tok}, {UoA/tok}, {target/ref}\n // (0, 0) is a valid price; (0, FIX_MAX) is unpriced\n\n // Save prices if priced\n if (high < FIX_MAX) {\n savedLowPrice = low;\n savedHighPrice = high;\n lastSave = uint48(block.timestamp);\n } else {\n // must be unpriced\n assert(low == 0);\n }\n\n // If the price is below the default-threshold price, default eventually\n // uint192(+/-) is the same as Fix.plus/minus\n if (pegPrice < pegBottom || pegPrice > pegTop || low == 0) {\n markStatus(CollateralStatus.IFFY);\n } else {\n markStatus(CollateralStatus.SOUND);\n }\n } catch (bytes memory errData) {\n // see: docs/solidity-style.md#Catching-Empty-Data\n if (errData.length == 0) revert(); // solhint-disable-line reason-string\n markStatus(CollateralStatus.IFFY);\n }\n\n CollateralStatus newStatus = status();\n if (oldStatus != newStatus) {\n emit CollateralStatusChanged(oldStatus, newStatus);\n }\n }\n\n /// @return {ref/tok} Exposed quantity of whole reference units per whole collateral tokens\n function refPerTok() public view virtual override returns (uint192) {\n return exposedReferencePrice;\n }\n\n /// Should update in inheritors\n /// @return {ref/tok} Actual quantity of whole reference units per whole collateral tokens\n function _underlyingRefPerTok() internal view virtual returns (uint192);\n}\n" }, "contracts/plugins/assets/Asset.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\";\nimport \"../../interfaces/IAsset.sol\";\nimport \"./OracleLib.sol\";\n\ncontract Asset is IAsset {\n using FixLib for uint192;\n using OracleLib for AggregatorV3Interface;\n\n AggregatorV3Interface public immutable chainlinkFeed; // {UoA/tok}\n\n IERC20Metadata public immutable erc20;\n\n uint8 public immutable erc20Decimals;\n\n uint192 public immutable override maxTradeVolume; // {UoA}\n\n uint48 public immutable oracleTimeout; // {s} Seconds that an oracle value is considered valid\n\n uint192 public immutable oracleError; // {1} The max % deviation allowed by the oracle\n\n // === Lot price ===\n\n uint48 public immutable priceTimeout; // {s} The period over which `savedHighPrice` decays to 0\n\n uint192 public savedLowPrice; // {UoA/tok} The low price of the token during the last update\n\n uint192 public savedHighPrice; // {UoA/tok} The high price of the token during the last update\n\n uint48 public lastSave; // {s} The timestamp when prices were last saved\n\n /// @param priceTimeout_ {s} The number of seconds over which savedHighPrice decays to 0\n /// @param chainlinkFeed_ Feed units: {UoA/tok}\n /// @param oracleError_ {1} The % the oracle feed can be off by\n /// @param maxTradeVolume_ {UoA} The max trade volume, in UoA\n /// @param oracleTimeout_ {s} The number of seconds until a oracle value becomes invalid\n constructor(\n uint48 priceTimeout_,\n AggregatorV3Interface chainlinkFeed_,\n uint192 oracleError_,\n IERC20Metadata erc20_,\n uint192 maxTradeVolume_,\n uint48 oracleTimeout_\n ) {\n require(priceTimeout_ > 0, \"price timeout zero\");\n require(address(chainlinkFeed_) != address(0), \"missing chainlink feed\");\n require(oracleError_ > 0 && oracleError_ < FIX_ONE, \"oracle error out of range\");\n require(address(erc20_) != address(0), \"missing erc20\");\n require(maxTradeVolume_ > 0, \"invalid max trade volume\");\n require(oracleTimeout_ > 0, \"oracleTimeout zero\");\n priceTimeout = priceTimeout_;\n chainlinkFeed = chainlinkFeed_;\n oracleError = oracleError_;\n erc20 = erc20_;\n erc20Decimals = erc20.decimals();\n maxTradeVolume = maxTradeVolume_;\n oracleTimeout = oracleTimeout_;\n }\n\n /// Can revert, used by other contract functions in order to catch errors\n /// Should not return FIX_MAX for low\n /// Should only return FIX_MAX for high if low is 0\n /// @dev The third (unused) variable is only here for compatibility with Collateral\n /// @param low {UoA/tok} The low price estimate\n /// @param high {UoA/tok} The high price estimate\n function tryPrice()\n external\n view\n virtual\n returns (\n uint192 low,\n uint192 high,\n uint192\n )\n {\n uint192 p = chainlinkFeed.price(oracleTimeout); // {UoA/tok}\n uint192 delta = p.mul(oracleError);\n return (p - delta, p + delta, 0);\n }\n\n /// Should not revert\n /// Refresh saved prices\n function refresh() public virtual override {\n try this.tryPrice() returns (uint192 low, uint192 high, uint192) {\n // {UoA/tok}, {UoA/tok}\n // (0, 0) is a valid price; (0, FIX_MAX) is unpriced\n\n // Save prices if priced\n if (high < FIX_MAX) {\n savedLowPrice = low;\n savedHighPrice = high;\n lastSave = uint48(block.timestamp);\n } else {\n // must be unpriced\n assert(low == 0);\n }\n } catch (bytes memory errData) {\n // see: docs/solidity-style.md#Catching-Empty-Data\n if (errData.length == 0) revert(); // solhint-disable-line reason-string\n }\n }\n\n /// Should not revert\n /// @dev Should be general enough to not need to be overridden\n /// @return {UoA/tok} The lower end of the price estimate\n /// @return {UoA/tok} The upper end of the price estimate\n function price() public view virtual returns (uint192, uint192) {\n try this.tryPrice() returns (uint192 low, uint192 high, uint192) {\n assert(low <= high);\n return (low, high);\n } catch (bytes memory errData) {\n // see: docs/solidity-style.md#Catching-Empty-Data\n if (errData.length == 0) revert(); // solhint-disable-line reason-string\n return (0, FIX_MAX);\n }\n }\n\n /// Should not revert\n /// lotLow should be nonzero when the asset might be worth selling\n /// @dev Should be general enough to not need to be overridden\n /// @return lotLow {UoA/tok} The lower end of the lot price estimate\n /// @return lotHigh {UoA/tok} The upper end of the lot price estimate\n function lotPrice() external view virtual returns (uint192 lotLow, uint192 lotHigh) {\n try this.tryPrice() returns (uint192 low, uint192 high, uint192) {\n // if the price feed is still functioning, use that\n lotLow = low;\n lotHigh = high;\n } catch (bytes memory errData) {\n // see: docs/solidity-style.md#Catching-Empty-Data\n if (errData.length == 0) revert(); // solhint-disable-line reason-string\n\n // if the price feed is broken, use a decayed historical value\n\n uint48 delta = uint48(block.timestamp) - lastSave; // {s}\n if (delta >= priceTimeout) return (0, 0); // no price after timeout elapses\n\n // {1} = {s} / {s}\n uint192 lotMultiplier = divuu(priceTimeout - delta, priceTimeout);\n\n // {UoA/tok} = {UoA/tok} * {1}\n lotLow = savedLowPrice.mul(lotMultiplier);\n lotHigh = savedHighPrice.mul(lotMultiplier);\n }\n assert(lotLow <= lotHigh);\n }\n\n /// @return {tok} The balance of the ERC20 in whole tokens\n function bal(address account) external view returns (uint192) {\n return shiftl_toFix(erc20.balanceOf(account), -int8(erc20Decimals));\n }\n\n /// @return If the asset is an instance of ICollateral or not\n function isCollateral() external pure virtual returns (bool) {\n return false;\n }\n\n // solhint-disable no-empty-blocks\n\n /// Claim rewards earned by holding a balance of the ERC20 token\n /// @dev Use delegatecall\n function claimRewards() external virtual {}\n\n // solhint-enable no-empty-blocks\n}\n" }, "contracts/plugins/assets/ATokenFiatCollateral.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\";\nimport \"../../libraries/Fixed.sol\";\nimport \"./AppreciatingFiatCollateral.sol\";\n\n// This interface is redundant with the one from contracts/plugins/aave/IStaticAToken,\n// but it's compiled with a different solidity version.\ninterface IStaticAToken is IERC20Metadata {\n /**\n * @notice Claim rewards\n * @param forceUpdate Flag to retrieve latest rewards from `INCENTIVES_CONTROLLER`\n */\n function claimRewardsToSelf(bool forceUpdate) external;\n\n /**\n * @notice Returns the Aave liquidity index of the underlying aToken, denominated rate here\n * as it can be considered as an ever-increasing exchange rate\n * @return The liquidity index\n **/\n function rate() external view returns (uint256);\n\n /// @return The reward token, ie stkAAVE\n // solhint-disable-next-line func-name-mixedcase\n function REWARD_TOKEN() external view returns (IERC20);\n}\n\n/**\n * @title ATokenFiatCollateral\n * @notice Collateral plugin for an aToken for a UoA-pegged asset, like aUSDC or a aUSDP\n * Expected: {tok} != {ref}, {ref} is pegged to {target} unless defaulting, {target} == {UoA}\n */\ncontract ATokenFiatCollateral is AppreciatingFiatCollateral {\n using OracleLib for AggregatorV3Interface;\n using FixLib for uint192;\n\n // solhint-disable no-empty-blocks\n\n /// @param revenueHiding {1} A value like 1e-6 that represents the maximum refPerTok to hide\n constructor(CollateralConfig memory config, uint192 revenueHiding)\n AppreciatingFiatCollateral(config, revenueHiding)\n {}\n\n // solhint-enable no-empty-blocks\n\n /// @return {ref/tok} Actual quantity of whole reference units per whole collateral tokens\n function _underlyingRefPerTok() internal view override returns (uint192) {\n uint256 rateInRAYs = IStaticAToken(address(erc20)).rate(); // {ray ref/tok}\n return shiftl_toFix(rateInRAYs, -27);\n }\n\n /// Claim rewards earned by holding a balance of the ERC20 token\n /// @dev Use delegatecall\n function claimRewards() external virtual override(Asset, IRewardable) {\n IERC20 stkAAVE = IStaticAToken(address(erc20)).REWARD_TOKEN();\n uint256 oldBal = stkAAVE.balanceOf(address(this));\n IStaticAToken(address(erc20)).claimRewardsToSelf(true);\n emit RewardsClaimed(stkAAVE, stkAAVE.balanceOf(address(this)) - oldBal);\n }\n}\n" }, "contracts/plugins/assets/FiatCollateral.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol\";\nimport \"../../interfaces/IAsset.sol\";\nimport \"../../libraries/Fixed.sol\";\nimport \"./Asset.sol\";\nimport \"./OracleLib.sol\";\n\nuint48 constant MAX_DELAY_UNTIL_DEFAULT = 1209600; // {s} 2 weeks\n\nstruct CollateralConfig {\n uint48 priceTimeout; // {s} The number of seconds over which saved prices decay\n AggregatorV3Interface chainlinkFeed; // Feed units: {target/ref}\n uint192 oracleError; // {1} The % the oracle feed can be off by\n IERC20Metadata erc20; // The ERC20 of the collateral token\n uint192 maxTradeVolume; // {UoA} The max trade volume, in UoA\n uint48 oracleTimeout; // {s} The number of seconds until a oracle value becomes invalid\n bytes32 targetName; // The bytes32 representation of the target name\n uint192 defaultThreshold; // {1} A value like 0.05 that represents a deviation tolerance\n // set defaultThreshold to zero to create SelfReferentialCollateral\n uint48 delayUntilDefault; // {s} The number of seconds an oracle can mulfunction\n}\n\n/**\n * @title FiatCollateral\n * Parent class for all collateral. Can be extended to support appreciating collateral\n *\n * For: {tok} == {ref}, {ref} != {target}, {target} == {UoA}\n * Can be easily extended by (optionally) re-implementing:\n * - tryPrice()\n * - refPerTok()\n * - targetPerRef()\n * - claimRewards()\n * If you have appreciating collateral, then you should use AppreciatingFiatCollateral or\n * override refresh() yourself.\n *\n * Can intentionally disable default checks by setting config.defaultThreshold to 0\n */\ncontract FiatCollateral is ICollateral, Asset {\n using FixLib for uint192;\n using OracleLib for AggregatorV3Interface;\n\n // Default Status:\n // _whenDefault == NEVER: no risk of default (initial value)\n // _whenDefault > block.timestamp: delayed default may occur as soon as block.timestamp.\n // In this case, the asset may recover, reachiving _whenDefault == NEVER.\n // _whenDefault <= block.timestamp: default has already happened (permanently)\n uint48 private constant NEVER = type(uint48).max;\n uint48 private _whenDefault = NEVER;\n\n uint48 public immutable delayUntilDefault; // {s} e.g 86400\n\n // targetName: The canonical name of this collateral's target unit.\n bytes32 public immutable targetName;\n\n uint192 public immutable pegBottom; // {target/ref} The bottom of the peg\n\n uint192 public immutable pegTop; // {target/ref} The top of the peg\n\n /// @param config.chainlinkFeed Feed units: {UoA/ref}\n constructor(CollateralConfig memory config)\n Asset(\n config.priceTimeout,\n config.chainlinkFeed,\n config.oracleError,\n config.erc20,\n config.maxTradeVolume,\n config.oracleTimeout\n )\n {\n require(config.targetName != bytes32(0), \"targetName missing\");\n if (config.defaultThreshold > 0) {\n require(config.delayUntilDefault > 0, \"delayUntilDefault zero\");\n }\n require(config.delayUntilDefault <= 1209600, \"delayUntilDefault too long\");\n\n targetName = config.targetName;\n delayUntilDefault = config.delayUntilDefault;\n\n // Cache constants\n uint192 peg = targetPerRef(); // {target/ref}\n\n // {target/ref}= {target/ref} * {1}\n uint192 delta = peg.mul(config.defaultThreshold);\n pegBottom = peg - delta;\n pegTop = peg + delta;\n }\n\n /// Can revert, used by other contract functions in order to catch errors\n /// Should not return FIX_MAX for low\n /// Should only return FIX_MAX for high if low is 0\n /// @dev Override this when pricing is more complicated than just a single oracle\n /// @param low {UoA/tok} The low price estimate\n /// @param high {UoA/tok} The high price estimate\n /// @param pegPrice {target/ref} The actual price observed in the peg\n function tryPrice()\n external\n view\n virtual\n override\n returns (\n uint192 low,\n uint192 high,\n uint192 pegPrice\n )\n {\n pegPrice = chainlinkFeed.price(oracleTimeout); // {target/ref}\n\n // {target/ref} = {target/ref} * {1}\n uint192 delta = pegPrice.mul(oracleError);\n\n low = pegPrice - delta;\n high = pegPrice + delta;\n }\n\n /// Should not revert\n /// Refresh exchange rates and update default status.\n /// @dev May need to override: limited to handling collateral with refPerTok() = 1\n function refresh() public virtual override(Asset, IAsset) {\n if (alreadyDefaulted()) return;\n CollateralStatus oldStatus = status();\n\n // Check for soft default + save lotPrice\n try this.tryPrice() returns (uint192 low, uint192 high, uint192 pegPrice) {\n // {UoA/tok}, {UoA/tok}, {target/ref}\n // (0, 0) is a valid price; (0, FIX_MAX) is unpriced\n\n // Save prices if priced\n if (high < FIX_MAX) {\n savedLowPrice = low;\n savedHighPrice = high;\n lastSave = uint48(block.timestamp);\n } else {\n // must be unpriced\n assert(low == 0);\n }\n\n // If the price is below the default-threshold price, default eventually\n // uint192(+/-) is the same as Fix.plus/minus\n if (pegPrice < pegBottom || pegPrice > pegTop || low == 0) {\n markStatus(CollateralStatus.IFFY);\n } else {\n markStatus(CollateralStatus.SOUND);\n }\n } catch (bytes memory errData) {\n // see: docs/solidity-style.md#Catching-Empty-Data\n if (errData.length == 0) revert(); // solhint-disable-line reason-string\n markStatus(CollateralStatus.IFFY);\n }\n\n CollateralStatus newStatus = status();\n if (oldStatus != newStatus) {\n emit CollateralStatusChanged(oldStatus, newStatus);\n }\n }\n\n /// @return The collateral's status\n function status() public view returns (CollateralStatus) {\n if (_whenDefault == NEVER) {\n return CollateralStatus.SOUND;\n } else if (_whenDefault > block.timestamp) {\n return CollateralStatus.IFFY;\n } else {\n return CollateralStatus.DISABLED;\n }\n }\n\n // === Helpers for child classes ===\n\n function markStatus(CollateralStatus status_) internal {\n // untestable:\n // All calls to markStatus happen exclusively if the collateral is not defaulted\n if (_whenDefault <= block.timestamp) return; // prevent DISABLED -> SOUND/IFFY\n\n if (status_ == CollateralStatus.SOUND) {\n _whenDefault = NEVER;\n } else if (status_ == CollateralStatus.IFFY) {\n uint256 sum = block.timestamp + uint256(delayUntilDefault);\n // untestable:\n // constructor enforces max length on delayUntilDefault\n if (sum >= NEVER) _whenDefault = NEVER;\n else if (sum < _whenDefault) _whenDefault = uint48(sum);\n // else: no change to _whenDefault\n // untested:\n // explicit `if` to check DISABLED. else branch will never be hit\n } else if (status_ == CollateralStatus.DISABLED) {\n _whenDefault = uint48(block.timestamp);\n }\n }\n\n function alreadyDefaulted() internal view returns (bool) {\n return _whenDefault <= block.timestamp;\n }\n\n function whenDefault() external view returns (uint256) {\n return _whenDefault;\n }\n\n // === End child helpers ===\n\n /// @return {ref/tok} Quantity of whole reference units per whole collateral tokens\n function refPerTok() public view virtual returns (uint192) {\n return FIX_ONE;\n }\n\n /// @return {target/ref} Quantity of whole target units per whole reference unit in the peg\n function targetPerRef() public view virtual returns (uint192) {\n return FIX_ONE;\n }\n\n /// @return If the asset is an instance of ICollateral or not\n function isCollateral() external pure virtual override(Asset, IAsset) returns (bool) {\n return true;\n }\n}\n" }, "contracts/plugins/assets/OracleLib.sol": { "content": "// SPDX-License-Identifier: BlueOak-1.0.0\npragma solidity 0.8.17;\n\nimport \"@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol\";\nimport \"../../libraries/Fixed.sol\";\n\nerror StalePrice();\n\n/// Used by asset plugins to price their collateral\nlibrary OracleLib {\n /// @dev Use for on-the-fly calculations that should revert\n /// @param timeout The number of seconds after which oracle values should be considered stale\n /// @return {UoA/tok}\n function price(AggregatorV3Interface chainlinkFeed, uint48 timeout)\n internal\n view\n returns (uint192)\n {\n (uint80 roundId, int256 p, , uint256 updateTime, uint80 answeredInRound) = chainlinkFeed\n .latestRoundData();\n\n if (updateTime == 0 || answeredInRound < roundId) {\n revert StalePrice();\n }\n // Downcast is safe: uint256(-) reverts on underflow; block.timestamp assumed < 2^48\n uint48 secondsSince = uint48(block.timestamp - updateTime);\n if (secondsSince > timeout) revert StalePrice();\n\n // {UoA/tok}\n return shiftl_toFix(uint256(p), -int8(chainlinkFeed.decimals()));\n }\n}\n" } }, "settings": { "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} } }