Contract Name:
MerkleRootDistributor
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/utils/Initializable.sol)
pragma solidity ^0.8.0;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since a proxied contract can't have a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To initialize the implementation contract, you can either invoke the
* initializer manually, or you can include a constructor to automatically mark it as initialized when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() initializer {}
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
*/
bool private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializer() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(_initializing ? _isConstructor() : !_initialized, "Initializable: contract is already initialized");
bool isTopLevelCall = !_initializing;
if (isTopLevelCall) {
_initializing = true;
_initialized = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
function _isConstructor() private view returns (bool) {
return !AddressUpgradeable.isContract(address(this));
}
}
// 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 IERC20Upgradeable {
/**
* @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/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// 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 (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Address.sol)
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.12;
import "@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol";
/// @title IAgToken
/// @author Angle Core Team
/// @notice Interface for the stablecoins `AgToken` contracts
/// @dev This interface only contains functions of the `AgToken` contract which are called by other contracts
/// of this module or of the first module of the Angle Protocol
interface IAgToken is IERC20Upgradeable {
// ======================= Minter Role Only Functions ===========================
/// @notice Lets the `StableMaster` contract or another whitelisted contract mint agTokens
/// @param account Address to mint to
/// @param amount Amount to mint
/// @dev The contracts allowed to issue agTokens are the `StableMaster` contract, `VaultManager` contracts
/// associated to this stablecoin as well as the flash loan module (if activated) and potentially contracts
/// whitelisted by governance
function mint(address account, uint256 amount) external;
/// @notice Burns `amount` tokens from a `burner` address after being asked to by `sender`
/// @param amount Amount of tokens to burn
/// @param burner Address to burn from
/// @param sender Address which requested the burn from `burner`
/// @dev This method is to be called by a contract with the minter right after being requested
/// to do so by a `sender` address willing to burn tokens from another `burner` address
/// @dev The method checks the allowance between the `sender` and the `burner`
function burnFrom(
uint256 amount,
address burner,
address sender
) external;
/// @notice Burns `amount` tokens from a `burner` address
/// @param amount Amount of tokens to burn
/// @param burner Address to burn from
/// @dev This method is to be called by a contract with a minter right on the AgToken after being
/// requested to do so by an address willing to burn tokens from its address
function burnSelf(uint256 amount, address burner) external;
// ========================= Treasury Only Functions ===========================
/// @notice Adds a minter in the contract
/// @param minter Minter address to add
/// @dev Zero address checks are performed directly in the `Treasury` contract
function addMinter(address minter) external;
/// @notice Removes a minter from the contract
/// @param minter Minter address to remove
/// @dev This function can also be called by a minter wishing to revoke itself
function removeMinter(address minter) external;
/// @notice Sets a new treasury contract
/// @param _treasury New treasury address
function setTreasury(address _treasury) external;
// ========================= External functions ================================
/// @notice Checks whether an address has the right to mint agTokens
/// @param minter Address for which the minting right should be checked
/// @return Whether the address has the right to mint agTokens or not
function isMinter(address minter) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.12;
/// @title ICoreBorrow
/// @author Angle Core Team
/// @notice Interface for the `CoreBorrow` contract
/// @dev This interface only contains functions of the `CoreBorrow` contract which are called by other contracts
/// of this module
interface ICoreBorrow {
/// @notice Checks if an address corresponds to a treasury of a stablecoin with a flash loan
/// module initialized on it
/// @param treasury Address to check
/// @return Whether the address has the `FLASHLOANER_TREASURY_ROLE` or not
function isFlashLoanerTreasury(address treasury) external view returns (bool);
/// @notice Checks whether an address is governor of the Angle Protocol or not
/// @param admin Address to check
/// @return Whether the address has the `GOVERNOR_ROLE` or not
function isGovernor(address admin) external view returns (bool);
/// @notice Checks whether an address is governor or a guardian of the Angle Protocol or not
/// @param admin Address to check
/// @return Whether the address has the `GUARDIAN_ROLE` or not
/// @dev Governance should make sure when adding a governor to also give this governor the guardian
/// role by calling the `addGovernor` function
function isGovernorOrGuardian(address admin) external view returns (bool);
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.12;
import "./IAgToken.sol";
import "./ICoreBorrow.sol";
/// @title IFlashAngle
/// @author Angle Core Team
/// @notice Interface for the `FlashAngle` contract
/// @dev This interface only contains functions of the contract which are called by other contracts
/// of this module
interface IFlashAngle {
/// @notice Reference to the `CoreBorrow` contract managing the FlashLoan module
function core() external view returns (ICoreBorrow);
/// @notice Sends the fees taken from flash loans to the treasury contract associated to the stablecoin
/// @param stablecoin Stablecoin from which profits should be sent
/// @return balance Amount of profits sent
/// @dev This function can only be called by the treasury contract
function accrueInterestToTreasury(IAgToken stablecoin) external returns (uint256 balance);
/// @notice Adds support for a stablecoin
/// @param _treasury Treasury associated to the stablecoin to add support for
/// @dev This function can only be called by the `CoreBorrow` contract
function addStablecoinSupport(address _treasury) external;
/// @notice Removes support for a stablecoin
/// @param _treasury Treasury associated to the stablecoin to remove support for
/// @dev This function can only be called by the `CoreBorrow` contract
function removeStablecoinSupport(address _treasury) external;
/// @notice Sets a new core contract
/// @param _core Core contract address to set
/// @dev This function can only be called by the `CoreBorrow` contract
function setCore(address _core) external;
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.12;
import "./IAgToken.sol";
import "./ICoreBorrow.sol";
import "./IFlashAngle.sol";
/// @title ITreasury
/// @author Angle Core Team
/// @notice Interface for the `Treasury` contract
/// @dev This interface only contains functions of the `Treasury` which are called by other contracts
/// of this module
interface ITreasury {
/// @notice Stablecoin handled by this `treasury` contract
function stablecoin() external view returns (IAgToken);
/// @notice Checks whether a given address has the governor role
/// @param admin Address to check
/// @return Whether the address has the governor role
/// @dev Access control is only kept in the `CoreBorrow` contract
function isGovernor(address admin) external view returns (bool);
/// @notice Checks whether a given address has the guardian or the governor role
/// @param admin Address to check
/// @return Whether the address has the guardian or the governor role
/// @dev Access control is only kept in the `CoreBorrow` contract which means that this function
/// queries the `CoreBorrow` contract
function isGovernorOrGuardian(address admin) external view returns (bool);
/// @notice Checks whether a given address has well been initialized in this contract
/// as a `VaultManager``
/// @param _vaultManager Address to check
/// @return Whether the address has been initialized or not
function isVaultManager(address _vaultManager) external view returns (bool);
/// @notice Sets a new flash loan module for this stablecoin
/// @param _flashLoanModule Reference to the new flash loan module
/// @dev This function removes the minting right to the old flash loan module and grants
/// it to the new module
function setFlashLoanModule(address _flashLoanModule) external;
}
// SPDX-License-Identifier: GPL-3.0
pragma solidity 0.8.12;
import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "../interfaces/ITreasury.sol";
struct MerkleTree {
// Root of a Merkle tree which leaves are (address user, address token, uint amount)
// representing an amount of tokens owed to user.
// The Merkle tree is assumed to have only increasing amounts: that is to say if a user can claim 1,
// then after the amount associated in the Merkle tree for this token should be x > 1
bytes32 merkleRoot;
// Ipfs hash of the tree data
bytes32 ipfsHash;
}
/// @title MerkleRootDistributor
/// @notice Allows the DAO to distribute rewards through Merkle Roots
/// @author Angle Core Team
contract MerkleRootDistributor is Initializable {
using SafeERC20 for IERC20;
/// @notice Tree of claimable tokens through this contract
MerkleTree public tree;
/// @notice Treasury contract handling access control
ITreasury public treasury;
/// @notice Mapping user -> token -> amount to track claimed amounts
mapping(address => mapping(address => uint256)) public claimed;
/// @notice Trusted EOAs to update the merkle root
mapping(address => uint256) public trusted;
uint256[46] private __gap;
// ================================== Events ===================================
event TrustedToggled(address indexed eoa, bool trust);
event Recovered(address indexed token, address indexed to, uint256 amount);
event TreeUpdated(bytes32 merkleRoot, bytes32 ipfsHash);
event Claimed(address user, address token, uint256 amount);
// ================================== Errors ===================================
error InvalidLengths();
error InvalidProof();
error NotGovernorOrGuardian();
error NotTrusted();
error ZeroAddress();
// ================================= Modifiers =================================
/// @notice Checks whether the `msg.sender` has the governor role or the guardian role
modifier onlyGovernorOrGuardian() {
if (!treasury.isGovernorOrGuardian(msg.sender)) revert NotGovernorOrGuardian();
_;
}
/// @notice Checks whether the `msg.sender` is a trusted address to change the Merkle root of the contract
modifier onlyTrusted() {
if (!treasury.isGovernorOrGuardian(msg.sender) && trusted[msg.sender] != 1) revert NotTrusted();
_;
}
// ============================ Constructor ====================================
constructor() initializer {}
function initialize(ITreasury _treasury) public initializer {
if(address(_treasury) == address(0)) revert ZeroAddress();
treasury = _treasury;
}
// =========================== Main Function ===================================
/// @notice Claims rewards for a given set of users
/// @dev Anyone may call this function for anyone else, funds go to destination regardless, it's just a question of
/// who provides the proof and pays the gas: `msg.sender` is not used in this function
/// @param users Recipient of tokens
/// @param tokens ERC20 claimed
/// @param amounts Amount of tokens that will be sent to the corresponding users
/// @param proofs Array of hashes bridging from leaf (hash of user | token | amount) to Merkle root
function claim(
address[] calldata users,
address[] calldata tokens,
uint256[] calldata amounts,
bytes32[][] calldata proofs
) public {
if (
users.length == 0 ||
users.length != tokens.length ||
users.length != amounts.length ||
users.length != proofs.length
) revert InvalidLengths();
for (uint256 i = 0; i < users.length; i++) {
address user = users[i];
address token = tokens[i];
uint256 amount = amounts[i];
// Verifying proof
bytes32 leaf = keccak256(abi.encode(user, token, amount));
if (!_verifyProof(leaf, proofs[i])) revert InvalidProof();
// Closing reentrancy gate here
uint256 toSend = amount - claimed[user][token];
claimed[user][token] = amount;
IERC20(token).safeTransfer(user, toSend);
emit Claimed(user, token, toSend);
}
}
// =========================== Governance Functions ============================
/// @notice Pull reward amount from caller
function deposit_reward_token (IERC20 token, uint256 amount) external {
token.transferFrom(msg.sender, address(this),amount);
}
/// @notice Adds or removes trusted EOA
function toggleTrusted(address eoa) external onlyGovernorOrGuardian {
uint256 trustedStatus = 1 - trusted[eoa];
trusted[eoa] = trustedStatus;
emit TrustedToggled(eoa, trustedStatus == 1);
}
/// @notice Updates Merkle Tree
function updateTree(MerkleTree calldata _tree) external onlyTrusted {
tree = _tree;
emit TreeUpdated(_tree.merkleRoot, _tree.ipfsHash);
}
/// @notice Recovers any ERC20 token
function recoverERC20(
address tokenAddress,
address to,
uint256 amountToRecover
) external onlyGovernorOrGuardian {
IERC20(tokenAddress).safeTransfer(to, amountToRecover);
emit Recovered(tokenAddress, to, amountToRecover);
}
// =========================== Internal Functions ==============================
/// @notice Checks the validity of a proof
/// @param leaf Hashed leaf data, the starting point of the proof
/// @param proof Array of hashes forming a hash chain from leaf to root
/// @return true If proof is correct, else false
function _verifyProof(bytes32 leaf, bytes32[] memory proof) internal view returns (bool) {
bytes32 currentHash = leaf;
for (uint256 i = 0; i < proof.length; i += 1) {
if (currentHash < proof[i]) {
currentHash = keccak256(abi.encode(currentHash, proof[i]));
} else {
currentHash = keccak256(abi.encode(proof[i], currentHash));
}
}
return currentHash == tree.merkleRoot;
}
}