Contract Name:
GasMonetization
Contract Source Code:
File 1 of 1 : GasMonetization
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @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
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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 functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or 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 {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// 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
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1);
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(
uint256 x,
uint256 y,
uint256 denominator,
Rounding rounding
) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10**64) {
value /= 10**64;
result += 64;
}
if (value >= 10**32) {
value /= 10**32;
result += 32;
}
if (value >= 10**16) {
value /= 10**16;
result += 16;
}
if (value >= 10**8) {
value /= 10**8;
result += 8;
}
if (value >= 10**4) {
value /= 10**4;
result += 4;
}
if (value >= 10**2) {
value /= 10**2;
result += 2;
}
if (value >= 10**1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
}
}
}
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}
// 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;
}
}
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
unchecked {
uint256 length = Math.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, Math.log256(value) + 1);
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
}
// OpenZeppelin Contracts (last updated v4.8.0) (access/AccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role);
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `_msgSender()` is missing `role`.
* Overriding this function changes the behavior of the {onlyRole} modifier.
*
* Format of the revert message is described in {_checkRole}.
*
* _Available since v4.6._
*/
function _checkRole(bytes32 role) internal view virtual {
_checkRole(role, _msgSender());
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view virtual {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(account),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*
* May emit a {RoleGranted} event.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*
* May emit a {RoleRevoked} event.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been revoked `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*
* May emit a {RoleRevoked} event.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* May emit a {RoleGranted} event.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*
* NOTE: This function is deprecated in favor of {_grantRole}.
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
/**
* @dev Grants `role` to `account`.
*
* Internal function without access restriction.
*
* May emit a {RoleGranted} event.
*/
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
/**
* @dev Revokes `role` from `account`.
*
* Internal function without access restriction.
*
* May emit a {RoleRevoked} event.
*/
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
pragma solidity ^0.8.1;
interface ISfc {
function currentEpoch() external view returns (uint256);
function currentSealedEpoch() external view returns (uint256);
}
pragma solidity ^0.8.1;
contract GasMonetization is AccessControl {
using Address for address payable;
event FundsAdded(address indexed funder, uint256 amount);
event FundsWithdrawn(address indexed recipient, uint256 amount);
event ProjectAdded(
uint256 indexed projectId,
address indexed owner,
address indexed rewardsRecipient,
string metadataUri,
uint256 activeFromEpoch,
address[] contracts
);
event ProjectSuspended(uint256 indexed projectId, uint256 suspendedOnEpochNumber);
event ProjectEnabled(uint256 indexed projectId, uint256 enabledOnEpochNumber);
event ProjectContractAdded(uint256 indexed projectId, address indexed contractAddress);
event ProjectContractRemoved(uint256 indexed projectId, address indexed contractAddress);
event ProjectMetadataUriUpdated(uint256 indexed projectId, string metadataUri);
event ProjectRewardsRecipientUpdated(uint256 indexed projectId, address recipient);
event ProjectOwnerUpdated(uint256 indexed projectId, address owner);
event RewardClaimRequested(uint256 indexed projectId, uint256 requestEpochNumber);
event RewardClaimCompleted(uint256 indexed projectId, uint256 epochNumber, uint256 amount);
event RewardClaimCanceled(uint256 indexed projectId, uint256 epochNumber);
event InvalidRewardClaimAmount(
uint256 indexed projectId,
uint256 requestEpochNumber,
uint256 amount,
uint256 diffAmount
);
event RewardClaimEpochsLimitUpdated(uint256 limit);
event RewardClaimConfirmationsLimitUpdated(uint256 limit);
event SfcAddressUpdated(address sfcAddress);
event ContractDeployed(
address sfcAddress,
uint256 rewardClaimEpochsFrequencyLimit,
uint256 rewardClaimRequiredConfirmations
);
/**
* @notice Accounts with this role are eligible to fund this contract.
*/
bytes32 public constant FUNDER_ROLE = keccak256("FUNDER");
/**
* @notice Accounts with this role are eligible to handle funds of this contract.
*/
bytes32 public constant FUNDS_MANAGER_ROLE = keccak256("FUNDS_MANAGER");
/**
* @notice Accounts with this role are eligible to manage projects.
*/
bytes32 public constant PROJECTS_MANAGER_ROLE = keccak256("PROJECTS_MANAGER");
/**
* @notice Accounts with this role are eligible to provide data related to reward claims.
*/
bytes32 public constant REWARDS_ORACLE_ROLE = keccak256("REWARDS_ORACLE");
/**
* @notice Project represents a project that is eligible to claim rewards. This structure consists
* of project's metadata uri and all related contracts, which will be used to calculate rewards.
*/
struct Project {
address owner;
address rewardsRecipient;
string metadataUri;
uint256 lastClaimEpoch;
uint256 activeFromEpoch;
// Used for disabled projects, when value is 0, then project has no expiration.
uint256 activeToEpoch;
}
/**
* @dev Registry of projects implemented as "project id" => "project" mapping.
*/
mapping(uint256 => Project) public projects;
/**
* @dev Registry of contracts and assigned projects implemented as "contract address" => "project id" mapping.
*/
mapping(address => uint256) public contracts;
/**
* @dev Sfc contract used for obtaining current epoch.
*/
ISfc public sfc;
/**
* @dev Restricts reward claims frequency by specified epochs number.
*/
uint256 public minEpochsBetweenClaims;
/**
* @dev Restricts how many confirmations we need to make reward claim.
*/
uint256 public requiredRewardClaimConfirmations;
/**
* @dev Last epoch id when contract was funded.
*/
uint256 public lastFundedEpoch = 0;
/**
* @notice PendingRewardClaimRequest represents a pending reward claim of a project.
*/
struct PendingRewardClaimRequest {
uint256 requestedOnEpoch;
uint256 confirmationsCount;
uint256 confirmedAmount;
// Array of addresses providing confirmation to prevent obtaining confirmations from single address.
// Mapping can not be used, because it won't get deleted when request is deleted.
// From solidity docs (https://docs.soliditylang.org/en/develop/types.html#delete):
// Delete has no effect on whole mappings (as the keys of mappings may be arbitrary and are generally unknown).
// So if you delete a struct, it will reset all members that are not mappings and also recurse into the members
// unless they are mappings. However, individual keys and what they map to can be deleted.
address[] confirmedBy;
}
/**
* @dev Registry of pending reward claims implemented as "project id" => "pending reward claim" mapping.
*/
mapping(uint256 => PendingRewardClaimRequest) public pendingRewardClaims;
/**
* @dev Internal counter for identifiers of projects.
*/
uint256 public lastProjectId = 0;
/**
* @notice Contract constructor. It assigns to the creator admin role. Addresses with `DEFAULT_ADMIN_ROLE`
* are eligible to grant and revoke memberships in particular roles.
* @param sfcAddress Address of SFC contract.
* @param rewardClaimEpochsFrequencyLimit Limits how often withdrawals can be done.
* @param rewardClaimRequiredConfirmations Required confirmations to make claim.
*/
constructor(
address sfcAddress,
uint256 rewardClaimEpochsFrequencyLimit,
uint256 rewardClaimRequiredConfirmations
) public {
sfc = ISfc(sfcAddress);
minEpochsBetweenClaims = rewardClaimEpochsFrequencyLimit;
requiredRewardClaimConfirmations = rewardClaimRequiredConfirmations;
_grantRole(DEFAULT_ADMIN_ROLE, _msgSender());
// set sfc as funder by default
_grantRole(FUNDER_ROLE, sfcAddress);
// set funds manager role by default to sender
_grantRole(FUNDS_MANAGER_ROLE, _msgSender());
emit ContractDeployed(sfcAddress, rewardClaimEpochsFrequencyLimit, rewardClaimRequiredConfirmations);
}
/**
* @notice New reward claim. Only project owner can request.
* @param projectId Id of project.
*/
function newRewardClaim(uint256 projectId) external {
require(projects[projectId].owner == _msgSender(), "GasMonetization: not owner");
require(pendingRewardClaims[projectId].requestedOnEpoch == 0, "GasMonetization: has pending claim");
require(
projects[projectId].activeToEpoch == 0
|| projects[projectId].lastClaimEpoch < projects[projectId].activeToEpoch,
"GasMonetization: project disabled"
);
uint256 epoch = sfc.currentSealedEpoch();
uint256 lastProjectClaimEpoch = projects[projectId].lastClaimEpoch;
require(
lastProjectClaimEpoch < lastFundedEpoch
&& epoch - lastProjectClaimEpoch > minEpochsBetweenClaims,
"GasMonetization: must wait to claim"
);
// prepare new claim
pendingRewardClaims[projectId].requestedOnEpoch = epoch;
emit RewardClaimRequested(projectId, epoch);
}
/**
* @notice Confirm reward claim.
* @param projectId Id of project.
* @param epochNumber Number of epoch when request was made.
* @param amount Amount that owner should receive.
*/
function confirmRewardClaim(uint256 projectId, uint256 epochNumber, uint256 amount) external {
require(hasRole(REWARDS_ORACLE_ROLE, _msgSender()), "GasMonetization: not rewards oracle");
require(hasPendingRewardClaim(projectId, epochNumber), "GasMonetization: no claim request");
require(amount > 0, "GasMonetization: no amount to claim");
PendingRewardClaimRequest storage request = pendingRewardClaims[projectId];
// set amount when it is first confirmation
if (request.confirmationsCount == 0) {
request.confirmedAmount = amount;
} else if (request.confirmedAmount != amount) {
// otherwise if amount is different, invalidate data we obtained so far
// and emit event, so next attempt can be made
emit InvalidRewardClaimAmount(projectId, epochNumber, request.confirmedAmount, amount);
delete pendingRewardClaims[projectId];
request.requestedOnEpoch = epochNumber;
return;
}
// validate that provider has not already provided data
for (uint256 i = 0; i < request.confirmedBy.length; ++i) {
require(request.confirmedBy[i] != _msgSender(), "GasMonetization: already provided");
}
// send amount if confirmations threshold is reached and delete request
if (request.confirmationsCount + 1 >= requiredRewardClaimConfirmations) {
delete pendingRewardClaims[projectId];
projects[projectId].lastClaimEpoch = epochNumber;
payable(projects[projectId].rewardsRecipient).sendValue(amount);
emit RewardClaimCompleted(projectId, epochNumber, amount);
return;
}
// gas optimization
request.confirmedBy.push(_msgSender());
request.confirmationsCount++;
}
/**
* @notice Cancel reward claim request.
* @param projectId Id of project.
* @param epochNumber Epoch number of claim request.
*/
function cancelRewardClaim(uint256 projectId, uint256 epochNumber) external {
require(hasPendingRewardClaim(projectId, epochNumber), "GasMonetization: no claim request");
PendingRewardClaimRequest storage request = pendingRewardClaims[projectId];
// only owner or data provider can cancel claim request
if (projects[projectId].owner == _msgSender()) {
// also owner must wait to cancel claim request until claim epoch limit is reached
require(
sfc.currentEpoch() - request.requestedOnEpoch > minEpochsBetweenClaims,
"GasMonetization: must wait to cancel"
);
} else {
require(hasRole(REWARDS_ORACLE_ROLE, _msgSender()), "GasMonetization: not reward oracle or owner");
}
delete pendingRewardClaims[projectId];
emit RewardClaimCanceled(projectId, epochNumber);
}
/**
* @notice Add project into registry.
* @param owner Address of project owner.
* @param rewardsRecipient Address of rewards receiver.
* @param metadataUri Uri of project's metadata.
* @param projectContracts Array of related contracts.
*/
function addProject(
address owner,
address rewardsRecipient,
string calldata metadataUri,
address[] calldata projectContracts
) external {
require(hasRole(PROJECTS_MANAGER_ROLE, _msgSender()), "GasMonetization: not projects manager");
require(bytes(metadataUri).length > 0, "GasMonetization: empty metadata uri");
lastProjectId++;
projects[lastProjectId] = Project({
owner: owner,
rewardsRecipient: rewardsRecipient,
metadataUri: metadataUri,
lastClaimEpoch: 0,
activeFromEpoch: sfc.currentEpoch(),
activeToEpoch: 0
});
for (uint256 i = 0; i < projectContracts.length; ++i) {
require(contracts[projectContracts[i]] == 0, "GasMonetization: contract already registered");
contracts[projectContracts[i]] = lastProjectId;
}
emit ProjectAdded(
lastProjectId,
projects[lastProjectId].owner,
projects[lastProjectId].rewardsRecipient,
projects[lastProjectId].metadataUri,
projects[lastProjectId].activeFromEpoch,
projectContracts
);
}
/**
* @notice Suspend project from receiving rewards.
* @param projectId Id of project.
*/
function suspendProject(uint256 projectId) external {
require(hasRole(PROJECTS_MANAGER_ROLE, _msgSender()), "GasMonetization: not projects manager");
require(projects[projectId].owner != address(0), "GasMonetization: project does not exist");
require(projects[projectId].activeToEpoch == 0, "GasMonetization: project suspended");
projects[projectId].activeToEpoch = sfc.currentEpoch();
emit ProjectSuspended(projectId, projects[projectId].activeToEpoch);
}
/**
* @notice Enable project to receive rewards.
* @param projectId Id of project.
*/
function enableProject(uint256 projectId) external {
require(hasRole(PROJECTS_MANAGER_ROLE, _msgSender()), "GasMonetization: not projects manager");
require(projects[projectId].owner != address(0), "GasMonetization: project does not exist");
require(projects[projectId].activeToEpoch != 0, "GasMonetization: project active");
projects[projectId].activeFromEpoch = sfc.currentEpoch();
projects[projectId].activeToEpoch = 0;
emit ProjectEnabled(projectId, projects[projectId].activeFromEpoch);
}
/**
* @notice Add project contract into registry.
* @param projectId Id of project.
* @param contractAddress Address of project's contract.
*/
function addProjectContract(uint256 projectId, address contractAddress) external {
require(hasRole(PROJECTS_MANAGER_ROLE, _msgSender()), "GasMonetization: not projects manager");
require(projects[projectId].owner != address(0), "GasMonetization: project does not exist");
require(contracts[contractAddress] == 0, "GasMonetization: contract already registered");
contracts[contractAddress] = projectId;
emit ProjectContractAdded(projectId, contractAddress);
}
/**
* @notice Remove project contract from registry.
* @param projectId Id of project.
* @param contractAddress Address of contract.
*/
function removeProjectContract(uint256 projectId, address contractAddress) external {
require(hasRole(PROJECTS_MANAGER_ROLE, _msgSender()), "GasMonetization: not projects manager");
require(projects[projectId].owner != address(0), "GasMonetization: project does not exist");
require(contracts[contractAddress] == projectId, "GasMonetization: contract not registered");
delete contracts[contractAddress];
emit ProjectContractRemoved(projectId, contractAddress);
}
/**
* @notice Update project's metadata uri.
* @param projectId Id of project.
* @param metadataUri Uri of project's metadata.
*/
function updateProjectMetadataUri(uint256 projectId, string calldata metadataUri) external {
require(hasRole(PROJECTS_MANAGER_ROLE, _msgSender()), "GasMonetization: not projects manager");
require(projects[projectId].owner != address(0), "GasMonetization: project does not exist");
require(bytes(metadataUri).length > 0, "GasMonetization: empty metadata uri");
projects[projectId].metadataUri = metadataUri;
emit ProjectMetadataUriUpdated(projectId, metadataUri);
}
/**
* @notice Update project's rewards recipient.
* @param projectId Id of project.
* @param recipient Address of recipient.
*/
function updateProjectRewardsRecipient(uint256 projectId, address recipient) external {
require(
projects[projectId].owner == _msgSender() || hasRole(PROJECTS_MANAGER_ROLE, _msgSender()),
"GasMonetization: not projects manager or owner"
);
require(projects[projectId].owner != address(0), "GasMonetization: project does not exist");
projects[projectId].rewardsRecipient = recipient;
emit ProjectRewardsRecipientUpdated(projectId, recipient);
}
/**
* @notice Update project's owner.
* @param projectId Id of project.
* @param owner Address of owner.
*/
function updateProjectOwner(uint256 projectId, address owner) external {
require(
projects[projectId].owner == _msgSender() || hasRole(PROJECTS_MANAGER_ROLE, _msgSender()),
"GasMonetization: not projects manager or owner"
);
require(projects[projectId].owner != address(0), "GasMonetization: project does not exist");
projects[projectId].owner = owner;
emit ProjectOwnerUpdated(projectId, owner);
}
/**
* @notice Add funds.
*/
function addFunds() public payable {
require(hasRole(FUNDER_ROLE, _msgSender()), "GasMonetization: not funder");
require(msg.value > 0, "GasMonetization: no funds sent");
lastFundedEpoch = sfc.currentSealedEpoch();
emit FundsAdded(_msgSender(), msg.value);
}
/**
* @notice Withdraw funds.
* @param recipient Address of recipient.
* @param amount Amount to be withdrawn.
*/
function withdrawFunds(address payable recipient, uint256 amount) external {
require(hasRole(FUNDS_MANAGER_ROLE, _msgSender()), "GasMonetization: not funds manager");
recipient.sendValue(amount);
emit FundsWithdrawn(recipient, amount);
}
/**
* @notice Withdraw all funds.
* @param recipient Address of recipient.
*/
function withdrawAllFunds(address payable recipient) external {
require(hasRole(FUNDS_MANAGER_ROLE, _msgSender()), "GasMonetization: not funds manager");
uint256 balance = address(this).balance;
recipient.sendValue(balance);
emit FundsWithdrawn(recipient, balance);
}
/**
* @notice Update reward claim epochs frequency limit.
* @param limit New limit.
*/
function updateRewardClaimEpochsFrequencyLimit(uint256 limit) external {
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "GasMonetization: not admin");
minEpochsBetweenClaims = limit;
emit RewardClaimEpochsLimitUpdated(limit);
}
/**
* @notice Update reward claim required confirmations.
* @param limit New limit.
*/
function updateRewardClaimRequiredConfirmations(uint256 limit) public {
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "GasMonetization: not admin");
requiredRewardClaimConfirmations = limit;
emit RewardClaimConfirmationsLimitUpdated(limit);
}
/**
* @notice Update sfc address.
* @param newSfc New sfc address.
*/
function updateSfcAddress(address newSfc) external {
require(hasRole(DEFAULT_ADMIN_ROLE, _msgSender()), "GasMonetization: not admin");
sfc = ISfc(newSfc);
emit SfcAddressUpdated(newSfc);
}
/**
* @notice Check owner has pending reward claim on given epoch id.
* @param projectId Id of project.
* @param epochId Id of epoch when request was made.
*/
function hasPendingRewardClaim(uint256 projectId, uint256 epochId) public view returns(bool) {
return pendingRewardClaims[projectId].requestedOnEpoch == epochId;
}
/**
* @notice Get project owner.
* @param projectId Project id.
*/
function getProjectOwner(uint256 projectId) external view returns(address) {
return projects[projectId].owner;
}
/**
* @notice Get project rewards recipient.
* @param projectId Project id.
*/
function getProjectRewardsRecipient(uint256 projectId) external view returns(address) {
return projects[projectId].rewardsRecipient;
}
/**
* @notice Get project metadata uri.
* @param projectId Project id.
*/
function getProjectMetadataUri(uint256 projectId) external view returns(string memory) {
return projects[projectId].metadataUri;
}
/**
* @notice Get project last claim epoch.
* @param projectId Project id.
*/
function getProjectLastClaimEpoch(uint256 projectId) external view returns(uint256) {
return projects[projectId].lastClaimEpoch;
}
/**
* @notice Get project active from epoch.
* @param projectId Project id.
*/
function getProjectActiveFromEpoch(uint256 projectId) external view returns(uint256) {
return projects[projectId].activeFromEpoch;
}
/**
* @notice Get project active to epoch.
* @param projectId Project id.
*/
function getProjectActiveToEpoch(uint256 projectId) external view returns(uint256) {
return projects[projectId].activeToEpoch;
}
/**
* @notice Get project id of given contract.
* @param contractAddress Address of a contract.
*/
function getProjectIdOfContract(address contractAddress) external view returns(uint256) {
return contracts[contractAddress];
}
/**
* @notice Get epoch of pending reward claim for given project id.
* @param projectId Project id.
*/
function getPendingRewardClaimEpoch(uint256 projectId) external view returns(uint256) {
return pendingRewardClaims[projectId].requestedOnEpoch;
}
/**
* @notice Get pending reward claim confirmations count.
* @param projectId Project id.
*/
function getPendingRewardClaimConfirmationsCount(uint256 projectId) public view returns(uint256) {
return pendingRewardClaims[projectId].confirmationsCount;
}
/**
* @notice Get pending reward claim confirmed amount.
* @param projectId Project id.
*/
function getPendingRewardClaimConfirmedAmount(uint256 projectId) public view returns(uint256) {
return pendingRewardClaims[projectId].confirmedAmount;
}
/**
* @notice Get pending reward claim addresses confirming current claim.
* @param projectId Project id.
*/
function getPendingRewardClaimConfirmedBy(uint256 projectId) public view returns(address[] memory) {
return pendingRewardClaims[projectId].confirmedBy;
}
/**
* @notice Receive function implementation to handle adding funds directly via "send" or "transfer" methods.
*/
receive() external payable {
addFunds();
}
}