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Similar Match Source Code This contract matches the deployed Bytecode of the Source Code for Contract 0xc7baBB93...2fF0E1d14 The constructor portion of the code might be different and could alter the actual behaviour of the contract
Contract Name:
ShareDebtToken
Compiler Version
v0.8.13+commit.abaa5c0e
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; import "../interfaces/IERC20R.sol"; import "../interfaces/ISilo.sol"; import "./ShareToken.sol"; /// @title ShareDebtToken /// @notice ERC20 compatible token representing debt position in Silo /// @dev It implements reversed approvals and checks solvency of recipient on transfer. /// /// It is assumed that there is no attack vector on taking someone else's debt because we don't see /// economical reason why one would do such thing. For that reason anyone can transfer owner's token /// to any recipient as long as receiving wallet approves the transfer. In other words, anyone can /// take someone else's debt without asking. /// @custom:security-contact [email protected] contract ShareDebtToken is IERC20R, ShareToken { /// @dev maps _owner => _recipient => amount mapping(address => mapping(address => uint256)) private _receiveAllowances; error OwnerIsZero(); error RecipientIsZero(); error ShareTransferNotAllowed(); error AmountExceedsAllowance(); error RecipientNotSolventAfterTransfer(); constructor ( string memory _name, string memory _symbol, address _silo, address _asset ) ERC20(_name, _symbol) ShareToken(_silo, _asset) { // all setup is done in parent contracts, nothing to do here } /// @inheritdoc IERC20R function setReceiveApproval(address owner, uint256 _amount) external virtual override { _setReceiveApproval(owner, _msgSender(), _amount); } /// @inheritdoc IERC20R function decreaseReceiveAllowance(address _owner, uint256 _subtractedValue) public virtual override { uint256 currentAllowance = _receiveAllowances[_owner][_msgSender()]; _setReceiveApproval(_owner, _msgSender(), currentAllowance - _subtractedValue); } /// @inheritdoc IERC20R function increaseReceiveAllowance(address _owner, uint256 _addedValue) public virtual override { uint256 currentAllowance = _receiveAllowances[_owner][_msgSender()]; _setReceiveApproval(_owner, _msgSender(), currentAllowance + _addedValue); } /// @inheritdoc IERC20R function receiveAllowance(address _owner, address _recipient) public view virtual override returns (uint256) { return _receiveAllowances[_owner][_recipient]; } /// @dev Set allowance /// @param _owner owner of debt token /// @param _recipient wallet that allows `_owner` to send debt to its wallet /// @param _amount amount of token allowed to be transferred function _setReceiveApproval( address _owner, address _recipient, uint256 _amount ) internal virtual { if (_owner == address(0)) revert OwnerIsZero(); if (_recipient == address(0)) revert RecipientIsZero(); _receiveAllowances[_owner][_recipient] = _amount; emit ReceiveApproval(_owner, _recipient, _amount); } function _beforeTokenTransfer(address _sender, address _recipient, uint256 _amount) internal override { // If we are minting or burning, Silo is responsible to check all necessary conditions if (!_isTransfer(_sender, _recipient)) { return; } // Silo forbids having debt and collateral position of the same asset in given Silo if (!silo.borrowPossible(asset, _recipient)) revert ShareTransferNotAllowed(); // _recipient must approve debt transfer, _sender does not have to uint256 currentAllowance = receiveAllowance(_sender, _recipient); if (currentAllowance < _amount) revert AmountExceedsAllowance(); // There can't be an underflow in the subtraction because of the previous check unchecked { // update debt allowance _setReceiveApproval(_sender, _recipient, currentAllowance - _amount); } } function _afterTokenTransfer(address _sender, address _recipient, uint256 _amount) internal override { ShareToken._afterTokenTransfer(_sender, _recipient, _amount); // if we are minting or burning, Silo is responsible to check all necessary conditions // if we are NOT minting and not burning, it means we are transferring // make sure that _recipient is solvent after transfer if (_isTransfer(_sender, _recipient) && !silo.isSolvent(_recipient)) { revert RecipientNotSolventAfterTransfer(); } // report mint or transfer _notifyAboutTransfer(_sender, _recipient, _amount); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/ERC20.sol) pragma solidity ^0.8.0; import "./IERC20.sol"; import "./extensions/IERC20Metadata.sol"; import "../../utils/Context.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin Contracts guidelines: functions revert * instead returning `false` on failure. This behavior is nonetheless * conventional and does not conflict with the expectations of ERC20 * applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ contract ERC20 is Context, IERC20, IERC20Metadata { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; /** * @dev Sets the values for {name} and {symbol}. * * The default value of {decimals} is 18. To select a different value for * {decimals} you should overload it. * * All two of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev Returns the name of the token. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5.05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless this function is * overridden; * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual override returns (uint8) { return 18; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(_msgSender(), recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(_msgSender(), spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][_msgSender()]; require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance"); unchecked { _approve(sender, _msgSender(), currentAllowance - amount); } return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { uint256 currentAllowance = _allowances[_msgSender()][spender]; require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero"); unchecked { _approve(_msgSender(), spender, currentAllowance - subtractedValue); } return true; } /** * @dev Moves `amount` of tokens from `sender` to `recipient`. * * This internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); uint256 senderBalance = _balances[sender]; require(senderBalance >= amount, "ERC20: transfer amount exceeds balance"); unchecked { _balances[sender] = senderBalance - amount; } _balances[recipient] += amount; emit Transfer(sender, recipient, amount); _afterTokenTransfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply += amount; _balances[account] += amount; emit Transfer(address(0), account, amount); _afterTokenTransfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); uint256 accountBalance = _balances[account]; require(accountBalance >= amount, "ERC20: burn amount exceeds balance"); unchecked { _balances[account] = accountBalance - amount; } _totalSupply -= amount; emit Transfer(account, address(0), amount); _afterTokenTransfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * has been transferred to `to`. * - when `from` is zero, `amount` tokens have been minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens have been burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20Metadata is IERC20 { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; import "./IShareToken.sol"; import "./IFlashLiquidationReceiver.sol"; import "./ISiloRepository.sol"; interface IBaseSilo { enum AssetStatus { Undefined, Active, Removed } /// @dev Storage struct that holds all required data for a single token market struct AssetStorage { /// @dev Token that represents a share in totalDeposits of Silo IShareToken collateralToken; /// @dev Token that represents a share in collateralOnlyDeposits of Silo IShareToken collateralOnlyToken; /// @dev Token that represents a share in totalBorrowAmount of Silo IShareToken debtToken; /// @dev COLLATERAL: Amount of asset token that has been deposited to Silo with interest earned by depositors. /// It also includes token amount that has been borrowed. uint256 totalDeposits; /// @dev COLLATERAL ONLY: Amount of asset token that has been deposited to Silo that can be ONLY used /// as collateral. These deposits do NOT earn interest and CANNOT be borrowed. uint256 collateralOnlyDeposits; /// @dev DEBT: Amount of asset token that has been borrowed with accrued interest. uint256 totalBorrowAmount; } /// @dev Storage struct that holds data related to fees and interest struct AssetInterestData { /// @dev Total amount of already harvested protocol fees uint256 harvestedProtocolFees; /// @dev Total amount (ever growing) of asset token that has been earned by the protocol from /// generated interest. uint256 protocolFees; /// @dev Timestamp of the last time `interestRate` has been updated in storage. uint64 interestRateTimestamp; /// @dev True if asset was removed from the protocol. If so, deposit and borrow functions are disabled /// for that asset AssetStatus status; } /// @notice data that InterestModel needs for calculations struct UtilizationData { uint256 totalDeposits; uint256 totalBorrowAmount; /// @dev timestamp of last interest accrual uint64 interestRateTimestamp; } /// @dev Shares names and symbols that are generated while asset initialization struct AssetSharesMetadata { /// @dev Name for the collateral shares token string collateralName; /// @dev Symbol for the collateral shares token string collateralSymbol; /// @dev Name for the collateral only (protected collateral) shares token string protectedName; /// @dev Symbol for the collateral only (protected collateral) shares token string protectedSymbol; /// @dev Name for the debt shares token string debtName; /// @dev Symbol for the debt shares token string debtSymbol; } /// @notice Emitted when deposit is made /// @param asset asset address that was deposited /// @param depositor wallet address that deposited asset /// @param amount amount of asset that was deposited /// @param collateralOnly type of deposit, true if collateralOnly deposit was used event Deposit(address indexed asset, address indexed depositor, uint256 amount, bool collateralOnly); /// @notice Emitted when withdraw is made /// @param asset asset address that was withdrawn /// @param depositor wallet address that deposited asset /// @param receiver wallet address that received asset /// @param amount amount of asset that was withdrew /// @param collateralOnly type of withdraw, true if collateralOnly deposit was used event Withdraw( address indexed asset, address indexed depositor, address indexed receiver, uint256 amount, bool collateralOnly ); /// @notice Emitted on asset borrow /// @param asset asset address that was borrowed /// @param user wallet address that borrowed asset /// @param amount amount of asset that was borrowed event Borrow(address indexed asset, address indexed user, uint256 amount); /// @notice Emitted on asset repay /// @param asset asset address that was repaid /// @param user wallet address that repaid asset /// @param amount amount of asset that was repaid event Repay(address indexed asset, address indexed user, uint256 amount); /// @notice Emitted on user liquidation /// @param asset asset address that was liquidated /// @param user wallet address that was liquidated /// @param shareAmountRepaid amount of collateral-share token that was repaid. This is collateral token representing /// ownership of underlying deposit. /// @param seizedCollateral amount of underlying token that was seized by liquidator event Liquidate(address indexed asset, address indexed user, uint256 shareAmountRepaid, uint256 seizedCollateral); /// @notice Emitted when the status for an asset is updated /// @param asset asset address that was updated /// @param status new asset status event AssetStatusUpdate(address indexed asset, AssetStatus indexed status); /// @return version of the silo contract function VERSION() external returns (uint128); // solhint-disable-line func-name-mixedcase /// @notice Synchronize current bridge assets with Silo /// @dev This function needs to be called on Silo deployment to setup all assets for Silo. It needs to be /// called every time a bridged asset is added or removed. When bridge asset is removed, depositing and borrowing /// should be disabled during asset sync. function syncBridgeAssets() external; /// @notice Get Silo Repository contract address /// @return Silo Repository contract address function siloRepository() external view returns (ISiloRepository); /// @notice Get asset storage data /// @param _asset asset address /// @return AssetStorage struct function assetStorage(address _asset) external view returns (AssetStorage memory); /// @notice Get asset interest data /// @param _asset asset address /// @return AssetInterestData struct function interestData(address _asset) external view returns (AssetInterestData memory); /// @dev helper method for InterestRateModel calculations function utilizationData(address _asset) external view returns (UtilizationData memory data); /// @notice Calculates solvency of an account /// @param _user wallet address for which solvency is calculated /// @return true if solvent, false otherwise function isSolvent(address _user) external view returns (bool); /// @notice Returns all initialized (synced) assets of Silo including current and removed bridge assets /// @return assets array of initialized assets of Silo function getAssets() external view returns (address[] memory assets); /// @notice Returns all initialized (synced) assets of Silo including current and removed bridge assets /// with corresponding state /// @return assets array of initialized assets of Silo /// @return assetsStorage array of assets state corresponding to `assets` array function getAssetsWithState() external view returns (address[] memory assets, AssetStorage[] memory assetsStorage); /// @notice Check if depositing an asset for given account is possible /// @dev Depositing an asset that has been already borrowed (and vice versa) is disallowed /// @param _asset asset we want to deposit /// @param _depositor depositor address /// @return true if asset can be deposited by depositor function depositPossible(address _asset, address _depositor) external view returns (bool); /// @notice Check if borrowing an asset for given account is possible /// @dev Borrowing an asset that has been already deposited (and vice versa) is disallowed /// @param _asset asset we want to deposit /// @param _borrower borrower address /// @return true if asset can be borrowed by borrower function borrowPossible(address _asset, address _borrower) external view returns (bool); /// @dev Amount of token that is available for borrowing /// @param _asset asset to get liquidity for /// @return Silo liquidity function liquidity(address _asset) external view returns (uint256); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; /// @dev This interface stands for "ERC20 Reversed", /// in the sense that the recipient of a transfer needs to approve the transfer amount first interface IERC20R is IERC20 { /// @dev Emitted when the allowance of a `_receiver` for an `_owner` is set by /// a call to {changeReceiveApproval}. `value` is the new allowance. /// @param _owner previous owner of the debt /// @param _receiver wallet that received debt /// @param _value amount of token transferred event ReceiveApproval(address indexed _owner, address indexed _receiver, uint256 _value); /// @dev Atomically decreases the receive allowance granted to `owner` by the caller. /// This is an alternative to {receive approve} that can be used as a mitigation for problems /// described in {IERC20-approve}. /// Emits an {ReceiveApproval} event indicating the updated receive allowance. /// @param _owner owner of debt token that is being allowed sending it to the caller /// @param _subtractedValue amount of token to decrease allowance function decreaseReceiveAllowance(address _owner, uint256 _subtractedValue) external; /// @dev Atomically increases the receive allowance granted to `owner` by the caller. /// This is an alternative to {receive approve} that can be used as a mitigation for problems /// described in {IERC20-approve}. /// Emits an {ReceiveApproval} event indicating the updated receive allowance. /// @param _owner owner of debt token that is being allowed sending it to the caller /// @param _addedValue amount of token to increase allowance function increaseReceiveAllowance(address _owner, uint256 _addedValue) external; /// @dev Sets `_amount` as the allowance of `spender` over the caller's tokens. /// Returns a boolean value indicating whether the operation succeeded. /// IMPORTANT: Beware that changing an allowance with this method brings the risk /// that someone may use both the old and the new allowance by unfortunate /// transaction ordering. One possible solution to mitigate this race /// condition is to first reduce the spender's allowance to 0 and set the /// desired value afterwards: /// https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 /// OR use increase/decrease approval method instead. /// Emits an {ReceiveApproval} event. /// @param _owner owner of debt token that is being allowed sending it to the caller /// @param _amount amount of token allowance function setReceiveApproval(address _owner, uint256 _amount) external; /// @dev Returns the remaining number of tokens that `_owner` is allowed to send to `_receiver` /// through {transferFrom}. This is zero by default. /// @param _owner owner of debt token /// @param _receiver wallet that is receiving debt tokens /// @return current token allowance function receiveAllowance(address _owner, address _receiver) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.13; /// @dev when performing Silo flash liquidation, FlashReceiver contract will receive all collaterals interface IFlashLiquidationReceiver { /// @dev this method is called when doing Silo flash liquidation /// one can NOT assume, that if _seizedCollateral[i] != 0, then _shareAmountsToRepaid[i] must be 0 /// one should assume, that any combination of amounts is possible /// on callback, one must call `Silo.repayFor` because at the end of transaction, /// Silo will check if borrower is solvent. /// @param _user user address, that is liquidated /// @param _assets array of collateral assets received during user liquidation /// this array contains all assets (collateral borrowed) without any order /// @param _receivedCollaterals array of collateral amounts received during user liquidation /// indexes of amounts are related to `_assets`, /// @param _shareAmountsToRepaid array of amounts to repay for each asset /// indexes of amounts are related to `_assets`, /// @param _flashReceiverData data that are passed from sender that executes liquidation function siloLiquidationCallback( address _user, address[] calldata _assets, uint256[] calldata _receivedCollaterals, uint256[] calldata _shareAmountsToRepaid, bytes memory _flashReceiverData ) external; }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; interface IInterestRateModel { /* solhint-disable */ struct Config { // uopt ∈ (0, 1) – optimal utilization; int256 uopt; // ucrit ∈ (uopt, 1) – threshold of large utilization; int256 ucrit; // ulow ∈ (0, uopt) – threshold of low utilization int256 ulow; // ki > 0 – integrator gain int256 ki; // kcrit > 0 – proportional gain for large utilization int256 kcrit; // klow ≥ 0 – proportional gain for low utilization int256 klow; // klin ≥ 0 – coefficient of the lower linear bound int256 klin; // beta ≥ 0 - a scaling factor int256 beta; // ri ≥ 0 – initial value of the integrator int256 ri; // Tcrit ≥ 0 - the time during which the utilization exceeds the critical value int256 Tcrit; } /* solhint-enable */ /// @dev Set dedicated config for given asset in a Silo. Config is per asset per Silo so different assets /// in different Silo can have different configs. /// It will try to call `_silo.accrueInterest(_asset)` before updating config, but it is not guaranteed, /// that this call will be successful, if it fail config will be set anyway. /// @param _silo Silo address for which config should be set /// @param _asset asset address for which config should be set function setConfig(address _silo, address _asset, Config calldata _config) external; /// @dev get compound interest rate and update model storage /// @param _asset address of an asset in Silo for which interest rate should be calculated /// @param _blockTimestamp current block timestamp /// @return rcomp compounded interest rate from last update until now (1e18 == 100%) function getCompoundInterestRateAndUpdate( address _asset, uint256 _blockTimestamp ) external returns (uint256 rcomp); /// @dev Get config for given asset in a Silo. If dedicated config is not set, default one will be returned. /// @param _silo Silo address for which config should be set /// @param _asset asset address for which config should be set /// @return Config struct for asset in Silo function getConfig(address _silo, address _asset) external view returns (Config memory); /// @dev get compound interest rate /// @param _silo address of Silo /// @param _asset address of an asset in Silo for which interest rate should be calculated /// @param _blockTimestamp current block timestamp /// @return rcomp compounded interest rate from last update until now (1e18 == 100%) function getCompoundInterestRate( address _silo, address _asset, uint256 _blockTimestamp ) external view returns (uint256 rcomp); /// @dev get current annual interest rate /// @param _silo address of Silo /// @param _asset address of an asset in Silo for which interest rate should be calculated /// @param _blockTimestamp current block timestamp /// @return rcur current annual interest rate (1e18 == 100%) function getCurrentInterestRate( address _silo, address _asset, uint256 _blockTimestamp ) external view returns (uint256 rcur); /// @notice get the flag to detect rcomp restriction (zero current interest) due to overflow /// overflow boolean flag to detect rcomp restriction function overflowDetected( address _silo, address _asset, uint256 _blockTimestamp ) external view returns (bool overflow); /// @dev pure function that calculates current annual interest rate /// @param _c configuration object, InterestRateModel.Config /// @param _totalBorrowAmount current total borrows for asset /// @param _totalDeposits current total deposits for asset /// @param _interestRateTimestamp timestamp of last interest rate update /// @param _blockTimestamp current block timestamp /// @return rcur current annual interest rate (1e18 == 100%) function calculateCurrentInterestRate( Config memory _c, uint256 _totalDeposits, uint256 _totalBorrowAmount, uint256 _interestRateTimestamp, uint256 _blockTimestamp ) external pure returns (uint256 rcur); /// @dev pure function that calculates interest rate based on raw input data /// @param _c configuration object, InterestRateModel.Config /// @param _totalBorrowAmount current total borrows for asset /// @param _totalDeposits current total deposits for asset /// @param _interestRateTimestamp timestamp of last interest rate update /// @param _blockTimestamp current block timestamp /// @return rcomp compounded interest rate from last update until now (1e18 == 100%) /// @return ri current integral part of the rate /// @return Tcrit time during which the utilization exceeds the critical value /// @return overflow boolean flag to detect rcomp restriction function calculateCompoundInterestRateWithOverflowDetection( Config memory _c, uint256 _totalDeposits, uint256 _totalBorrowAmount, uint256 _interestRateTimestamp, uint256 _blockTimestamp ) external pure returns ( uint256 rcomp, int256 ri, int256 Tcrit, // solhint-disable-line var-name-mixedcase bool overflow ); /// @dev pure function that calculates interest rate based on raw input data /// @param _c configuration object, InterestRateModel.Config /// @param _totalBorrowAmount current total borrows for asset /// @param _totalDeposits current total deposits for asset /// @param _interestRateTimestamp timestamp of last interest rate update /// @param _blockTimestamp current block timestamp /// @return rcomp compounded interest rate from last update until now (1e18 == 100%) /// @return ri current integral part of the rate /// @return Tcrit time during which the utilization exceeds the critical value function calculateCompoundInterestRate( Config memory _c, uint256 _totalDeposits, uint256 _totalBorrowAmount, uint256 _interestRateTimestamp, uint256 _blockTimestamp ) external pure returns ( uint256 rcomp, int256 ri, int256 Tcrit // solhint-disable-line var-name-mixedcase ); /// @dev returns decimal points used by model function DP() external pure returns (uint256); // solhint-disable-line func-name-mixedcase /// @dev just a helper method to see if address is a InterestRateModel /// @return always true function interestRateModelPing() external pure returns (bytes4); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; /// @title Common interface for Silo Incentive Contract interface INotificationReceiver { /// @dev Informs the contract about token transfer /// @param _token address of the token that was transferred /// @param _from sender /// @param _to receiver /// @param _amount amount that was transferred function onAfterTransfer(address _token, address _from, address _to, uint256 _amount) external; /// @dev Sanity check function /// @return always true function notificationReceiverPing() external pure returns (bytes4); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity >=0.7.6 <0.9.0; /// @title Common interface for Silo Price Providers interface IPriceProvider { /// @notice Returns "Time-Weighted Average Price" for an asset. Calculates TWAP price for quote/asset. /// It unifies all tokens decimal to 18, examples: /// - if asses == quote it returns 1e18 /// - if asset is USDC and quote is ETH and ETH costs ~$3300 then it returns ~0.0003e18 WETH per 1 USDC /// @param _asset address of an asset for which to read price /// @return price of asses with 18 decimals, throws when pool is not ready yet to provide price function getPrice(address _asset) external view returns (uint256 price); /// @dev Informs if PriceProvider is setup for asset. It does not means PriceProvider can provide price right away. /// Some providers implementations need time to "build" buffer for TWAP price, /// so price may not be available yet but this method will return true. /// @param _asset asset in question /// @return TRUE if asset has been setup, otherwise false function assetSupported(address _asset) external view returns (bool); /// @notice Gets token address in which prices are quoted /// @return quoteToken address function quoteToken() external view returns (address); /// @notice Helper method that allows easily detects, if contract is PriceProvider /// @dev this can save us from simple human errors, in case we use invalid address /// but this should NOT be treated as security check /// @return always true function priceProviderPing() external pure returns (bytes4); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity >=0.7.6 <0.9.0; import "./IPriceProvider.sol"; interface IPriceProvidersRepository { /// @notice Emitted when price provider is added /// @param newPriceProvider new price provider address event NewPriceProvider(IPriceProvider indexed newPriceProvider); /// @notice Emitted when price provider is removed /// @param priceProvider removed price provider address event PriceProviderRemoved(IPriceProvider indexed priceProvider); /// @notice Emitted when asset is assigned to price provider /// @param asset assigned asset address /// @param priceProvider price provider address event PriceProviderForAsset(address indexed asset, IPriceProvider indexed priceProvider); /// @notice Register new price provider /// @param _priceProvider address of price provider function addPriceProvider(IPriceProvider _priceProvider) external; /// @notice Unregister price provider /// @param _priceProvider address of price provider to be removed function removePriceProvider(IPriceProvider _priceProvider) external; /// @notice Sets price provider for asset /// @dev Request for asset price is forwarded to the price provider assigned to that asset /// @param _asset address of an asset for which price provider will be used /// @param _priceProvider address of price provider function setPriceProviderForAsset(address _asset, IPriceProvider _priceProvider) external; /// @notice Returns "Time-Weighted Average Price" for an asset /// @param _asset address of an asset for which to read price /// @return price TWAP price of a token with 18 decimals function getPrice(address _asset) external view returns (uint256 price); /// @notice Gets price provider assigned to an asset /// @param _asset address of an asset for which to get price provider /// @return priceProvider address of price provider function priceProviders(address _asset) external view returns (IPriceProvider priceProvider); /// @notice Gets token address in which prices are quoted /// @return quoteToken address function quoteToken() external view returns (address); /// @notice Gets manager role address /// @return manager role address function manager() external view returns (address); /// @notice Checks if providers are available for an asset /// @param _asset asset address to check /// @return returns TRUE if price feed is ready, otherwise false function providersReadyForAsset(address _asset) external view returns (bool); /// @notice Returns true if address is a registered price provider /// @param _provider address of price provider to be removed /// @return true if address is a registered price provider, otherwise false function isPriceProvider(IPriceProvider _provider) external view returns (bool); /// @notice Gets number of price providers registered /// @return number of price providers registered function providersCount() external view returns (uint256); /// @notice Gets an array of price providers /// @return array of price providers function providerList() external view returns (address[] memory); /// @notice Sanity check function /// @return returns always TRUE function priceProvidersRepositoryPing() external pure returns (bytes4); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; import "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol"; import "./INotificationReceiver.sol"; interface IShareToken is IERC20Metadata { /// @notice Emitted every time receiver is notified about token transfer /// @param notificationReceiver receiver address /// @param success false if TX reverted on `notificationReceiver` side, otherwise true event NotificationSent( INotificationReceiver indexed notificationReceiver, bool success ); /// @notice Mint method for Silo to create debt position /// @param _account wallet for which to mint token /// @param _amount amount of token to be minted function mint(address _account, uint256 _amount) external; /// @notice Burn method for Silo to close debt position /// @param _account wallet for which to burn token /// @param _amount amount of token to be burned function burn(address _account, uint256 _amount) external; }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; import "./IBaseSilo.sol"; interface ISilo is IBaseSilo { /// @notice Deposit `_amount` of `_asset` tokens from `msg.sender` to the Silo /// @param _asset The address of the token to deposit /// @param _amount The amount of the token to deposit /// @param _collateralOnly True if depositing collateral only /// @return collateralAmount deposited amount /// @return collateralShare user collateral shares based on deposited amount function deposit(address _asset, uint256 _amount, bool _collateralOnly) external returns (uint256 collateralAmount, uint256 collateralShare); /// @notice Router function to deposit `_amount` of `_asset` tokens to the Silo for the `_depositor` /// @param _asset The address of the token to deposit /// @param _depositor The address of the recipient of collateral tokens /// @param _amount The amount of the token to deposit /// @param _collateralOnly True if depositing collateral only /// @return collateralAmount deposited amount /// @return collateralShare `_depositor` collateral shares based on deposited amount function depositFor(address _asset, address _depositor, uint256 _amount, bool _collateralOnly) external returns (uint256 collateralAmount, uint256 collateralShare); /// @notice Withdraw `_amount` of `_asset` tokens from the Silo to `msg.sender` /// @param _asset The address of the token to withdraw /// @param _amount The amount of the token to withdraw /// @param _collateralOnly True if withdrawing collateral only deposit /// @return withdrawnAmount withdrawn amount that was transferred to user /// @return withdrawnShare burned share based on `withdrawnAmount` function withdraw(address _asset, uint256 _amount, bool _collateralOnly) external returns (uint256 withdrawnAmount, uint256 withdrawnShare); /// @notice Router function to withdraw `_amount` of `_asset` tokens from the Silo for the `_depositor` /// @param _asset The address of the token to withdraw /// @param _depositor The address that originally deposited the collateral tokens being withdrawn, /// it should be the one initiating the withdrawal through the router /// @param _receiver The address that will receive the withdrawn tokens /// @param _amount The amount of the token to withdraw /// @param _collateralOnly True if withdrawing collateral only deposit /// @return withdrawnAmount withdrawn amount that was transferred to `_receiver` /// @return withdrawnShare burned share based on `withdrawnAmount` function withdrawFor( address _asset, address _depositor, address _receiver, uint256 _amount, bool _collateralOnly ) external returns (uint256 withdrawnAmount, uint256 withdrawnShare); /// @notice Borrow `_amount` of `_asset` tokens from the Silo to `msg.sender` /// @param _asset The address of the token to borrow /// @param _amount The amount of the token to borrow /// @return debtAmount borrowed amount /// @return debtShare user debt share based on borrowed amount function borrow(address _asset, uint256 _amount) external returns (uint256 debtAmount, uint256 debtShare); /// @notice Router function to borrow `_amount` of `_asset` tokens from the Silo for the `_receiver` /// @param _asset The address of the token to borrow /// @param _borrower The address that will take the loan, /// it should be the one initiating the borrowing through the router /// @param _receiver The address of the asset receiver /// @param _amount The amount of the token to borrow /// @return debtAmount borrowed amount /// @return debtShare `_receiver` debt share based on borrowed amount function borrowFor(address _asset, address _borrower, address _receiver, uint256 _amount) external returns (uint256 debtAmount, uint256 debtShare); /// @notice Repay `_amount` of `_asset` tokens from `msg.sender` to the Silo /// @param _asset The address of the token to repay /// @param _amount amount of asset to repay, includes interests /// @return repaidAmount amount repaid /// @return burnedShare burned debt share function repay(address _asset, uint256 _amount) external returns (uint256 repaidAmount, uint256 burnedShare); /// @notice Allows to repay in behalf of borrower to execute liquidation /// @param _asset The address of the token to repay /// @param _borrower The address of the user to have debt tokens burned /// @param _amount amount of asset to repay, includes interests /// @return repaidAmount amount repaid /// @return burnedShare burned debt share function repayFor(address _asset, address _borrower, uint256 _amount) external returns (uint256 repaidAmount, uint256 burnedShare); /// @dev harvest protocol fees from an array of assets /// @return harvestedAmounts amount harvested during tx execution for each of silo asset function harvestProtocolFees() external returns (uint256[] memory harvestedAmounts); /// @notice Function to update interests for `_asset` token since the last saved state /// @param _asset The address of the token to be updated /// @return interest accrued interest function accrueInterest(address _asset) external returns (uint256 interest); /// @notice this methods does not requires to have tokens in order to liquidate user /// @dev during liquidation process, msg.sender will be notified once all collateral will be send to him /// msg.sender needs to be `IFlashLiquidationReceiver` /// @param _users array of users to liquidate /// @param _flashReceiverData this data will be forward to msg.sender on notification /// @return assets array of all processed assets (collateral + debt, including removed) /// @return receivedCollaterals receivedCollaterals[userId][assetId] => amount /// amounts of collaterals send to `_flashReceiver` /// @return shareAmountsToRepaid shareAmountsToRepaid[userId][assetId] => amount /// required amounts of debt to be repaid function flashLiquidate(address[] memory _users, bytes memory _flashReceiverData) external returns ( address[] memory assets, uint256[][] memory receivedCollaterals, uint256[][] memory shareAmountsToRepaid ); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; interface ISiloFactory { /// @notice Emitted when Silo is deployed /// @param silo address of deployed Silo /// @param asset address of asset for which Silo was deployed /// @param version version of silo implementation event NewSiloCreated(address indexed silo, address indexed asset, uint128 version); /// @notice Must be called by repository on constructor /// @param _siloRepository the SiloRepository to set function initRepository(address _siloRepository) external; /// @notice Deploys Silo /// @param _siloAsset unique asset for which Silo is deployed /// @param _version version of silo implementation /// @param _data (optional) data that may be needed during silo creation /// @return silo deployed Silo address function createSilo(address _siloAsset, uint128 _version, bytes memory _data) external returns (address silo); /// @dev just a helper method to see if address is a factory function siloFactoryPing() external pure returns (bytes4); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; import "./ISiloFactory.sol"; import "./ITokensFactory.sol"; import "./IPriceProvidersRepository.sol"; import "./INotificationReceiver.sol"; import "./IInterestRateModel.sol"; interface ISiloRepository { /// @dev protocol fees in precision points (Solvency._PRECISION_DECIMALS), we do allow for fee == 0 struct Fees { /// @dev One time protocol fee for opening a borrow position in precision points (Solvency._PRECISION_DECIMALS) uint64 entryFee; /// @dev Protocol revenue share in interest paid in precision points (Solvency._PRECISION_DECIMALS) uint64 protocolShareFee; /// @dev Protocol share in liquidation profit in precision points (Solvency._PRECISION_DECIMALS). /// It's calculated from total collateral amount to be transferred to liquidator. uint64 protocolLiquidationFee; } struct SiloVersion { /// @dev Default version of Silo. If set to 0, it means it is not set. By default it is set to 1 uint128 byDefault; /// @dev Latest added version of Silo. If set to 0, it means it is not set. By default it is set to 1 uint128 latest; } /// @dev AssetConfig struct represents configurable parameters for each Silo struct AssetConfig { /// @dev Loan-to-Value ratio represents the maximum borrowing power of a specific collateral. /// For example, if the collateral asset has an LTV of 75%, the user can borrow up to 0.75 worth /// of quote token in the principal currency for every quote token worth of collateral. /// value uses 18 decimals eg. 100% == 1e18 /// max valid value is 1e18 so it needs storage of 60 bits uint64 maxLoanToValue; /// @dev Liquidation Threshold represents the threshold at which a borrow position will be considered /// undercollateralized and subject to liquidation for each collateral. For example, /// if a collateral has a liquidation threshold of 80%, it means that the loan will be /// liquidated when the borrowAmount value is worth 80% of the collateral value. /// value uses 18 decimals eg. 100% == 1e18 uint64 liquidationThreshold; /// @dev interest rate model address IInterestRateModel interestRateModel; } event NewDefaultMaximumLTV(uint64 defaultMaximumLTV); event NewDefaultLiquidationThreshold(uint64 defaultLiquidationThreshold); /// @notice Emitted on new Silo creation /// @param silo deployed Silo address /// @param asset unique asset for deployed Silo /// @param siloVersion version of deployed Silo event NewSilo(address indexed silo, address indexed asset, uint128 siloVersion); /// @notice Emitted when new Silo (or existing one) becomes a bridge pool (pool with only bridge tokens). /// @param pool address of the bridge pool, It can be zero address when bridge asset is removed and pool no longer /// is treated as bridge pool event BridgePool(address indexed pool); /// @notice Emitted on new bridge asset /// @param newBridgeAsset address of added bridge asset event BridgeAssetAdded(address indexed newBridgeAsset); /// @notice Emitted on removed bridge asset /// @param bridgeAssetRemoved address of removed bridge asset event BridgeAssetRemoved(address indexed bridgeAssetRemoved); /// @notice Emitted when default interest rate model is changed /// @param newModel address of new interest rate model event InterestRateModel(IInterestRateModel indexed newModel); /// @notice Emitted on price provider repository address update /// @param newProvider address of new oracle repository event PriceProvidersRepositoryUpdate( IPriceProvidersRepository indexed newProvider ); /// @notice Emitted on token factory address update /// @param newTokensFactory address of new token factory event TokensFactoryUpdate(address indexed newTokensFactory); /// @notice Emitted on router address update /// @param newRouter address of new router event RouterUpdate(address indexed newRouter); /// @notice Emitted on INotificationReceiver address update /// @param newIncentiveContract address of new INotificationReceiver event NotificationReceiverUpdate(INotificationReceiver indexed newIncentiveContract); /// @notice Emitted when new Silo version is registered /// @param factory factory address that deploys registered Silo version /// @param siloLatestVersion Silo version of registered Silo /// @param siloDefaultVersion current default Silo version event RegisterSiloVersion(address indexed factory, uint128 siloLatestVersion, uint128 siloDefaultVersion); /// @notice Emitted when Silo version is unregistered /// @param factory factory address that deploys unregistered Silo version /// @param siloVersion version that was unregistered event UnregisterSiloVersion(address indexed factory, uint128 siloVersion); /// @notice Emitted when default Silo version is updated /// @param newDefaultVersion new default version event SiloDefaultVersion(uint128 newDefaultVersion); /// @notice Emitted when default fee is updated /// @param newEntryFee new entry fee /// @param newProtocolShareFee new protocol share fee /// @param newProtocolLiquidationFee new protocol liquidation fee event FeeUpdate( uint64 newEntryFee, uint64 newProtocolShareFee, uint64 newProtocolLiquidationFee ); /// @notice Emitted when asset config is updated for a silo /// @param silo silo for which asset config is being set /// @param asset asset for which asset config is being set /// @param assetConfig new asset config event AssetConfigUpdate(address indexed silo, address indexed asset, AssetConfig assetConfig); /// @notice Emitted when silo (silo factory) version is set for asset /// @param asset asset for which asset config is being set /// @param version Silo version event VersionForAsset(address indexed asset, uint128 version); /// @param _siloAsset silo asset /// @return version of Silo that is assigned for provided asset, if not assigned it returns zero (default) function getVersionForAsset(address _siloAsset) external returns (uint128); /// @notice setter for `getVersionForAsset` mapping /// @param _siloAsset silo asset /// @param _version version of Silo that will be assigned for `_siloAsset`, zero (default) is acceptable function setVersionForAsset(address _siloAsset, uint128 _version) external; /// @notice use this method only when off-chain verification is OFF /// @dev Silo does NOT support rebase and deflationary tokens /// @param _siloAsset silo asset /// @param _siloData (optional) data that may be needed during silo creation /// @return createdSilo address of created silo function newSilo(address _siloAsset, bytes memory _siloData) external returns (address createdSilo); /// @notice use this method to deploy new version of Silo for an asset that already has Silo deployed. /// Only owner (DAO) can replace. /// @dev Silo does NOT support rebase and deflationary tokens /// @param _siloAsset silo asset /// @param _siloVersion version of silo implementation. Use 0 for default version which is fine /// for 99% of cases. /// @param _siloData (optional) data that may be needed during silo creation /// @return createdSilo address of created silo function replaceSilo( address _siloAsset, uint128 _siloVersion, bytes memory _siloData ) external returns (address createdSilo); /// @notice Set factory contract for debt and collateral tokens for each Silo asset /// @dev Callable only by owner /// @param _tokensFactory address of TokensFactory contract that deploys debt and collateral tokens function setTokensFactory(address _tokensFactory) external; /// @notice Set default fees /// @dev Callable only by owner /// @param _fees: /// - _entryFee one time protocol fee for opening a borrow position in precision points /// (Solvency._PRECISION_DECIMALS) /// - _protocolShareFee protocol revenue share in interest paid in precision points /// (Solvency._PRECISION_DECIMALS) /// - _protocolLiquidationFee protocol share in liquidation profit in precision points /// (Solvency._PRECISION_DECIMALS). It's calculated from total collateral amount to be transferred /// to liquidator. function setFees(Fees calldata _fees) external; /// @notice Set configuration for given asset in given Silo /// @dev Callable only by owner /// @param _silo Silo address for which config applies /// @param _asset asset address for which config applies /// @param _assetConfig: /// - _maxLoanToValue maximum Loan-to-Value, for details see `Repository.AssetConfig.maxLoanToValue` /// - _liquidationThreshold liquidation threshold, for details see `Repository.AssetConfig.maxLoanToValue` /// - _interestRateModel interest rate model address, for details see `Repository.AssetConfig.interestRateModel` function setAssetConfig( address _silo, address _asset, AssetConfig calldata _assetConfig ) external; /// @notice Set default interest rate model /// @dev Callable only by owner /// @param _defaultInterestRateModel default interest rate model function setDefaultInterestRateModel(IInterestRateModel _defaultInterestRateModel) external; /// @notice Set default maximum LTV /// @dev Callable only by owner /// @param _defaultMaxLTV default maximum LTV in precision points (Solvency._PRECISION_DECIMALS) function setDefaultMaximumLTV(uint64 _defaultMaxLTV) external; /// @notice Set default liquidation threshold /// @dev Callable only by owner /// @param _defaultLiquidationThreshold default liquidation threshold in precision points /// (Solvency._PRECISION_DECIMALS) function setDefaultLiquidationThreshold(uint64 _defaultLiquidationThreshold) external; /// @notice Set price provider repository /// @dev Callable only by owner /// @param _repository price provider repository address function setPriceProvidersRepository(IPriceProvidersRepository _repository) external; /// @notice Set router contract /// @dev Callable only by owner /// @param _router router address function setRouter(address _router) external; /// @notice Set NotificationReceiver contract /// @dev Callable only by owner /// @param _silo silo address for which to set `_notificationReceiver` /// @param _notificationReceiver NotificationReceiver address function setNotificationReceiver(address _silo, INotificationReceiver _notificationReceiver) external; /// @notice Adds new bridge asset /// @dev New bridge asset must be unique. Duplicates in bridge assets are not allowed. It's possible to add /// bridge asset that has been removed in the past. Note that all Silos must be synced manually. Callable /// only by owner. /// @param _newBridgeAsset bridge asset address function addBridgeAsset(address _newBridgeAsset) external; /// @notice Removes bridge asset /// @dev Note that all Silos must be synced manually. Callable only by owner. /// @param _bridgeAssetToRemove bridge asset address to be removed function removeBridgeAsset(address _bridgeAssetToRemove) external; /// @notice Registers new Silo version /// @dev User can choose which Silo version he wants to deploy. It's possible to have multiple versions of Silo. /// Callable only by owner. /// @param _factory factory contract that deploys new version of Silo /// @param _isDefault true if this version should be used as default function registerSiloVersion(ISiloFactory _factory, bool _isDefault) external; /// @notice Unregisters Silo version /// @dev Callable only by owner. /// @param _siloVersion Silo version to be unregistered function unregisterSiloVersion(uint128 _siloVersion) external; /// @notice Sets default Silo version /// @dev Callable only by owner. /// @param _defaultVersion Silo version to be set as default function setDefaultSiloVersion(uint128 _defaultVersion) external; /// @notice Check if contract address is a Silo deployment /// @param _silo address of expected Silo /// @return true if address is Silo deployment, otherwise false function isSilo(address _silo) external view returns (bool); /// @notice Get Silo address of asset /// @param _asset address of asset /// @return address of corresponding Silo deployment function getSilo(address _asset) external view returns (address); /// @notice Get Silo Factory for given version /// @param _siloVersion version of Silo implementation /// @return ISiloFactory contract that deploys Silos of given version function siloFactory(uint256 _siloVersion) external view returns (ISiloFactory); /// @notice Get debt and collateral Token Factory /// @return ITokensFactory contract that deploys debt and collateral tokens function tokensFactory() external view returns (ITokensFactory); /// @notice Get Router contract /// @return address of router contract function router() external view returns (address); /// @notice Get current bridge assets /// @dev Keep in mind that not all Silos may be synced with current bridge assets so it's possible that some /// assets in that list are not part of given Silo. /// @return address array of bridge assets function getBridgeAssets() external view returns (address[] memory); /// @notice Get removed bridge assets /// @dev Keep in mind that not all Silos may be synced with bridge assets so it's possible that some /// assets in that list are still part of given Silo. /// @return address array of bridge assets function getRemovedBridgeAssets() external view returns (address[] memory); /// @notice Get maximum LTV for asset in given Silo /// @dev If dedicated config is not set, method returns default config /// @param _silo address of Silo /// @param _asset address of an asset /// @return maximum LTV in precision points (Solvency._PRECISION_DECIMALS) function getMaximumLTV(address _silo, address _asset) external view returns (uint256); /// @notice Get Interest Rate Model address for asset in given Silo /// @dev If dedicated config is not set, method returns default config /// @param _silo address of Silo /// @param _asset address of an asset /// @return address of interest rate model function getInterestRateModel(address _silo, address _asset) external view returns (IInterestRateModel); /// @notice Get liquidation threshold for asset in given Silo /// @dev If dedicated config is not set, method returns default config /// @param _silo address of Silo /// @param _asset address of an asset /// @return liquidation threshold in precision points (Solvency._PRECISION_DECIMALS) function getLiquidationThreshold(address _silo, address _asset) external view returns (uint256); /// @notice Get incentive contract address. Incentive contracts are responsible for distributing rewards /// to debt and/or collateral token holders of given Silo /// @param _silo address of Silo /// @return incentive contract address function getNotificationReceiver(address _silo) external view returns (INotificationReceiver); /// @notice Get owner role address of Repository /// @return owner role address function owner() external view returns (address); /// @notice get PriceProvidersRepository contract that manages price providers implementations /// @return IPriceProvidersRepository address function priceProvidersRepository() external view returns (IPriceProvidersRepository); /// @dev Get protocol fee for opening a borrow position /// @return fee in precision points (Solvency._PRECISION_DECIMALS == 100%) function entryFee() external view returns (uint256); /// @dev Get protocol share fee /// @return protocol share fee in precision points (Solvency._PRECISION_DECIMALS == 100%) function protocolShareFee() external view returns (uint256); /// @dev Get protocol liquidation fee /// @return protocol liquidation fee in precision points (Solvency._PRECISION_DECIMALS == 100%) function protocolLiquidationFee() external view returns (uint256); /// @dev Checks all conditions for new silo creation and throws when not possible to create /// @param _asset address of asset for which you want to create silo /// @param _assetIsABridge bool TRUE when `_asset` is bridge asset, FALSE when it is not function ensureCanCreateSiloFor(address _asset, bool _assetIsABridge) external view; function siloRepositoryPing() external pure returns (bytes4); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; import "./IShareToken.sol"; interface ITokensFactory { /// @notice Emitted when collateral token is deployed /// @param token address of deployed collateral token event NewShareCollateralTokenCreated(address indexed token); /// @notice Emitted when collateral token is deployed /// @param token address of deployed debt token event NewShareDebtTokenCreated(address indexed token); ///@notice Must be called by repository on constructor /// @param _siloRepository the SiloRepository to set function initRepository(address _siloRepository) external; /// @notice Deploys collateral token /// @param _name name of the token /// @param _symbol symbol of the token /// @param _asset underlying asset for which token is deployed /// @return address of deployed collateral share token function createShareCollateralToken( string memory _name, string memory _symbol, address _asset ) external returns (IShareToken); /// @notice Deploys debt token /// @param _name name of the token /// @param _symbol symbol of the token /// @param _asset underlying asset for which token is deployed /// @return address of deployed debt share token function createShareDebtToken( string memory _name, string memory _symbol, address _asset ) external returns (IShareToken); /// @dev just a helper method to see if address is a factory /// @return always true function tokensFactoryPing() external pure returns (bytes4); }
// SPDX-License-Identifier: BUSL-1.1 pragma solidity 0.8.13; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "../interfaces/ISilo.sol"; import "../interfaces/IBaseSilo.sol"; import "../interfaces/IShareToken.sol"; import "../interfaces/INotificationReceiver.sol"; /// @title ShareToken /// @notice Implements common interface for Silo tokens representing debt or collateral positions. /// @custom:security-contact [email protected] abstract contract ShareToken is ERC20, IShareToken { /// @dev minimal share amount will give us higher precision for shares calculation, /// that way losses caused by division will be reduced to acceptable level uint256 public constant MINIMUM_SHARE_AMOUNT = 1e5; /// @notice Silo address for which tokens was deployed ISilo public immutable silo; /// @notice asset for which this tokens was deployed address public immutable asset; /// @dev decimals that match the original asset decimals uint8 internal immutable _decimals; error OnlySilo(); error MinimumShareRequirement(); modifier onlySilo { if (msg.sender != address(silo)) revert OnlySilo(); _; } /// @dev Token is always deployed for specific Silo and asset /// @param _silo Silo address for which tokens was deployed /// @param _asset asset for which this tokens was deployed constructor(address _silo, address _asset) { silo = ISilo(_silo); asset = _asset; _decimals = IERC20Metadata(_asset).decimals(); } /// @inheritdoc IShareToken function mint(address _account, uint256 _amount) external onlySilo override { _mint(_account, _amount); } /// @inheritdoc IShareToken function burn(address _account, uint256 _amount) external onlySilo override { _burn(_account, _amount); } /// @inheritdoc IERC20Metadata function symbol() public view virtual override(IERC20Metadata, ERC20) returns (string memory) { return ERC20.symbol(); } /// @return decimals that match original asset decimals function decimals() public view virtual override(IERC20Metadata, ERC20) returns (uint8) { return _decimals; } function _afterTokenTransfer(address _sender, address _recipient, uint256) internal override virtual { // fixing precision error on mint and burn if (_isTransfer(_sender, _recipient)) { return; } uint256 total = totalSupply(); // we require minimum amount to be present from first mint // and after burning, we do not allow for small leftover if (total != 0 && total < MINIMUM_SHARE_AMOUNT) revert MinimumShareRequirement(); } /// @dev Report token transfer to incentive contract if one is set /// @param _from sender /// @param _to recipient /// @param _amount amount that was transferred function _notifyAboutTransfer(address _from, address _to, uint256 _amount) internal { INotificationReceiver notificationReceiver = IBaseSilo(silo).siloRepository().getNotificationReceiver(address(silo)); if (address(notificationReceiver) != address(0)) { // solhint-disable-next-line avoid-low-level-calls (bool success,) = address(notificationReceiver).call( abi.encodeWithSelector( INotificationReceiver.onAfterTransfer.selector, address(this), _from, _to, _amount ) ); emit NotificationSent(notificationReceiver, success); } } /// @dev checks if operation is "real" transfer /// @param _sender sender address /// @param _recipient recipient address /// @return bool true if operation is real transfer, false if it is mint or burn function _isTransfer(address _sender, address _recipient) internal pure returns (bool) { // in order this check to be true, is is required to have: // require(sender != address(0), "ERC20: transfer from the zero address"); // require(recipient != address(0), "ERC20: transfer to the zero address"); // on transfer. ERC20 has them, so we good. return _sender != address(0) && _recipient != address(0); } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
Contract Security Audit
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ISilo","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
Deployed Bytecode
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Multichain Portfolio | 30 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.