Contract Name:
CommunityRewards
Contract Source Code:
pragma solidity ^0.6.0;
import "../Initializable.sol";
/*
* @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 GSN 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.
*/
contract ContextUpgradeSafe is Initializable {
// Empty internal constructor, to prevent people from mistakenly deploying
// an instance of this contract, which should be used via inheritance.
function __Context_init() internal initializer {
__Context_init_unchained();
}
function __Context_init_unchained() internal initializer {
}
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
uint256[50] private __gap;
}
pragma solidity >=0.4.24 <0.7.0;
/**
* @title Initializable
*
* @dev Helper contract to support initializer functions. To use it, replace
* the constructor with a function that has the `initializer` modifier.
* WARNING: Unlike constructors, initializer functions must be manually
* invoked. This applies both to deploying an Initializable contract, as well
* as extending an Initializable contract via inheritance.
* WARNING: When used with inheritance, manual care must be taken to not invoke
* a parent initializer twice, or ensure that all initializers are idempotent,
* because this is not dealt with automatically as with constructors.
*/
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 use in the initializer function of a contract.
*/
modifier initializer() {
require(initializing || isConstructor() || !initialized, "Contract instance has already been initialized");
bool isTopLevelCall = !initializing;
if (isTopLevelCall) {
initializing = true;
initialized = true;
}
_;
if (isTopLevelCall) {
initializing = false;
}
}
/// @dev Returns true if and only if the function is running in the constructor
function isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly { cs := extcodesize(self) }
return cs == 0;
}
// Reserved storage space to allow for layout changes in the future.
uint256[50] private ______gap;
}
pragma solidity ^0.6.0;
import "../utils/EnumerableSet.sol";
import "../utils/Address.sol";
import "../GSN/Context.sol";
import "../Initializable.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms.
*
* 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, _msgSender()));
* ...
* }
* ```
*
* 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}.
*/
abstract contract AccessControlUpgradeSafe is Initializable, ContextUpgradeSafe {
function __AccessControl_init() internal initializer {
__Context_init_unchained();
__AccessControl_init_unchained();
}
function __AccessControl_init_unchained() internal initializer {
}
using EnumerableSet for EnumerableSet.AddressSet;
using Address for address;
struct RoleData {
EnumerableSet.AddressSet members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_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) public view returns (bool) {
return _roles[role].members.contains(account);
}
/**
* @dev Returns the number of accounts that have `role`. Can be used
* together with {getRoleMember} to enumerate all bearers of a role.
*/
function getRoleMemberCount(bytes32 role) public view returns (uint256) {
return _roles[role].members.length();
}
/**
* @dev Returns one of the accounts that have `role`. `index` must be a
* value between 0 and {getRoleMemberCount}, non-inclusive.
*
* Role bearers are not sorted in any particular way, and their ordering may
* change at any point.
*
* WARNING: When using {getRoleMember} and {getRoleMemberCount}, make sure
* you perform all queries on the same block. See the following
* https://forum.openzeppelin.com/t/iterating-over-elements-on-enumerableset-in-openzeppelin-contracts/2296[forum post]
* for more information.
*/
function getRoleMember(bytes32 role, uint256 index) public view returns (address) {
return _roles[role].members.at(index);
}
/**
* @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 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.
*/
function grantRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to grant");
_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.
*/
function revokeRole(bytes32 role, address account) public virtual {
require(hasRole(_roles[role].adminRole, _msgSender()), "AccessControl: sender must be an admin to revoke");
_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 granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual {
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.
*
* [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}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (_roles[role].members.add(account)) {
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (_roles[role].members.remove(account)) {
emit RoleRevoked(role, account, _msgSender());
}
}
uint256[49] private __gap;
}
pragma solidity ^0.6.0;
import "./IERC165.sol";
import "../Initializable.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts may inherit from this and call {_registerInterface} to declare
* their support of an interface.
*/
contract ERC165UpgradeSafe is Initializable, IERC165 {
/*
* bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
*/
bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;
/**
* @dev Mapping of interface ids to whether or not it's supported.
*/
mapping(bytes4 => bool) private _supportedInterfaces;
function __ERC165_init() internal initializer {
__ERC165_init_unchained();
}
function __ERC165_init_unchained() internal initializer {
// Derived contracts need only register support for their own interfaces,
// we register support for ERC165 itself here
_registerInterface(_INTERFACE_ID_ERC165);
}
/**
* @dev See {IERC165-supportsInterface}.
*
* Time complexity O(1), guaranteed to always use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view override returns (bool) {
return _supportedInterfaces[interfaceId];
}
/**
* @dev Registers the contract as an implementer of the interface defined by
* `interfaceId`. Support of the actual ERC165 interface is automatic and
* registering its interface id is not required.
*
* See {IERC165-supportsInterface}.
*
* Requirements:
*
* - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
*/
function _registerInterface(bytes4 interfaceId) internal virtual {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
uint256[49] private __gap;
}
pragma solidity ^0.6.0;
/**
* @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);
}
pragma solidity ^0.6.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @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, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
pragma solidity ^0.6.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
pragma solidity ^0.6.0;
/**
* @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);
}
pragma solidity ^0.6.0;
import "./IERC20.sol";
import "../../math/SafeMath.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 ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
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));
}
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'
// solhint-disable-next-line max-line-length
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).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_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.
// A Solidity high level call has three parts:
// 1. The target address is checked to verify it contains contract code
// 2. The call itself is made, and success asserted
// 3. The return value is decoded, which in turn checks the size of the returned data.
// solhint-disable-next-line max-line-length
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
pragma solidity ^0.6.0;
import "../../GSN/Context.sol";
import "./IERC721.sol";
import "./IERC721Metadata.sol";
import "./IERC721Enumerable.sol";
import "./IERC721Receiver.sol";
import "../../introspection/ERC165.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";
import "../../utils/EnumerableSet.sol";
import "../../utils/EnumerableMap.sol";
import "../../utils/Strings.sol";
import "../../Initializable.sol";
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://eips.ethereum.org/EIPS/eip-721
*/
contract ERC721UpgradeSafe is Initializable, ContextUpgradeSafe, ERC165UpgradeSafe, IERC721, IERC721Metadata, IERC721Enumerable {
using SafeMath for uint256;
using Address for address;
using EnumerableSet for EnumerableSet.UintSet;
using EnumerableMap for EnumerableMap.UintToAddressMap;
using Strings for uint256;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;
// Mapping from holder address to their (enumerable) set of owned tokens
mapping (address => EnumerableSet.UintSet) private _holderTokens;
// Enumerable mapping from token ids to their owners
EnumerableMap.UintToAddressMap private _tokenOwners;
// Mapping from token ID to approved address
mapping (uint256 => address) private _tokenApprovals;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) private _operatorApprovals;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Optional mapping for token URIs
mapping(uint256 => string) private _tokenURIs;
// Base URI
string private _baseURI;
/*
* bytes4(keccak256('balanceOf(address)')) == 0x70a08231
* bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
* bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
* bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
* bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
* bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5
* bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
*
* => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
* 0xa22cb465 ^ 0xe985e9c ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
*/
bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;
/*
* bytes4(keccak256('name()')) == 0x06fdde03
* bytes4(keccak256('symbol()')) == 0x95d89b41
* bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd
*
* => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f
*/
bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f;
/*
* bytes4(keccak256('totalSupply()')) == 0x18160ddd
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59
* bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7
*
* => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63
*/
bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63;
function __ERC721_init(string memory name, string memory symbol) internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721_init_unchained(name, symbol);
}
function __ERC721_init_unchained(string memory name, string memory symbol) internal initializer {
_name = name;
_symbol = symbol;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(_INTERFACE_ID_ERC721);
_registerInterface(_INTERFACE_ID_ERC721_METADATA);
_registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE);
}
/**
* @dev Gets the balance of the specified address.
* @param owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(address owner) public view override returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _holderTokens[owner].length();
}
/**
* @dev Gets the owner of the specified token ID.
* @param tokenId uint256 ID of the token to query the owner of
* @return address currently marked as the owner of the given token ID
*/
function ownerOf(uint256 tokenId) public view override returns (address) {
return _tokenOwners.get(tokenId, "ERC721: owner query for nonexistent token");
}
/**
* @dev Gets the token name.
* @return string representing the token name
*/
function name() public view override returns (string memory) {
return _name;
}
/**
* @dev Gets the token symbol.
* @return string representing the token symbol
*/
function symbol() public view override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the URI for a given token ID. May return an empty string.
*
* If a base URI is set (via {_setBaseURI}), it is added as a prefix to the
* token's own URI (via {_setTokenURI}).
*
* If there is a base URI but no token URI, the token's ID will be used as
* its URI when appending it to the base URI. This pattern for autogenerated
* token URIs can lead to large gas savings.
*
* .Examples
* |===
* |`_setBaseURI()` |`_setTokenURI()` |`tokenURI()`
* | ""
* | ""
* | ""
* | ""
* | "token.uri/123"
* | "token.uri/123"
* | "token.uri/"
* | "123"
* | "token.uri/123"
* | "token.uri/"
* | ""
* | "token.uri/<tokenId>"
* |===
*
* Requirements:
*
* - `tokenId` must exist.
*/
function tokenURI(uint256 tokenId) public view override returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
string memory _tokenURI = _tokenURIs[tokenId];
// If there is no base URI, return the token URI.
if (bytes(_baseURI).length == 0) {
return _tokenURI;
}
// If both are set, concatenate the baseURI and tokenURI (via abi.encodePacked).
if (bytes(_tokenURI).length > 0) {
return string(abi.encodePacked(_baseURI, _tokenURI));
}
// If there is a baseURI but no tokenURI, concatenate the tokenID to the baseURI.
return string(abi.encodePacked(_baseURI, tokenId.toString()));
}
/**
* @dev Returns the base URI set via {_setBaseURI}. This will be
* automatically added as a prefix in {tokenURI} to each token's URI, or
* to the token ID if no specific URI is set for that token ID.
*/
function baseURI() public view returns (string memory) {
return _baseURI;
}
/**
* @dev Gets the token ID at a given index of the tokens list of the requested owner.
* @param owner address owning the tokens list to be accessed
* @param index uint256 representing the index to be accessed of the requested tokens list
* @return uint256 token ID at the given index of the tokens list owned by the requested address
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view override returns (uint256) {
return _holderTokens[owner].at(index);
}
/**
* @dev Gets the total amount of tokens stored by the contract.
* @return uint256 representing the total amount of tokens
*/
function totalSupply() public view override returns (uint256) {
// _tokenOwners are indexed by tokenIds, so .length() returns the number of tokenIds
return _tokenOwners.length();
}
/**
* @dev Gets the token ID at a given index of all the tokens in this contract
* Reverts if the index is greater or equal to the total number of tokens.
* @param index uint256 representing the index to be accessed of the tokens list
* @return uint256 token ID at the given index of the tokens list
*/
function tokenByIndex(uint256 index) public view override returns (uint256) {
(uint256 tokenId, ) = _tokenOwners.at(index);
return tokenId;
}
/**
* @dev Approves another address to transfer the given token ID
* The zero address indicates there is no approved address.
* There can only be one approved address per token at a given time.
* Can only be called by the token owner or an approved operator.
* @param to address to be approved for the given token ID
* @param tokenId uint256 ID of the token to be approved
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_approve(to, tokenId);
}
/**
* @dev Gets the approved address for a token ID, or zero if no address set
* Reverts if the token ID does not exist.
* @param tokenId uint256 ID of the token to query the approval of
* @return address currently approved for the given token ID
*/
function getApproved(uint256 tokenId) public view override returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
/**
* @dev Sets or unsets the approval of a given operator
* An operator is allowed to transfer all tokens of the sender on their behalf.
* @param operator operator address to set the approval
* @param approved representing the status of the approval to be set
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
require(operator != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][operator] = approved;
emit ApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev Tells whether an operator is approved by a given owner.
* @param owner owner address which you want to query the approval of
* @param operator operator address which you want to query the approval of
* @return bool whether the given operator is approved by the given owner
*/
function isApprovedForAll(address owner, address operator) public view override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev Transfers the ownership of a given token ID to another address.
* Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
* Requires the msg.sender to be the owner, approved, or operator.
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
*/
function transferFrom(address from, address to, uint256 tokenId) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_transfer(from, to, tokenId);
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement {IERC721Receiver-onERC721Received},
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the msg.sender to be the owner, approved, or operator
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
*/
function safeTransferFrom(address from, address to, uint256 tokenId) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement {IERC721Receiver-onERC721Received},
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the _msgSender() to be the owner, approved, or operator
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
_safeTransfer(from, to, tokenId, _data);
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the msg.sender to be the owner, approved, or operator
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
*/
function _safeTransfer(address from, address to, uint256 tokenId, bytes memory _data) internal virtual {
_transfer(from, to, tokenId);
require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Returns whether the specified token exists.
* @param tokenId uint256 ID of the token to query the existence of
* @return bool whether the token exists
*/
function _exists(uint256 tokenId) internal view returns (bool) {
return _tokenOwners.contains(tokenId);
}
/**
* @dev Returns whether the given spender can transfer a given token ID.
* @param spender address of the spender to query
* @param tokenId uint256 ID of the token to be transferred
* @return bool whether the msg.sender is approved for the given token ID,
* is an operator of the owner, or is the owner of the token
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) {
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(tokenId);
return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
}
/**
* @dev Internal function to safely mint a new token.
* Reverts if the given token ID already exists.
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* @param to The address that will own the minted token
* @param tokenId uint256 ID of the token to be minted
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Internal function to safely mint a new token.
* Reverts if the given token ID already exists.
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* @param to The address that will own the minted token
* @param tokenId uint256 ID of the token to be minted
* @param _data bytes data to send along with a safe transfer check
*/
function _safeMint(address to, uint256 tokenId, bytes memory _data) internal virtual {
_mint(to, tokenId);
require(_checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
}
/**
* @dev Internal function to mint a new token.
* Reverts if the given token ID already exists.
* @param to The address that will own the minted token
* @param tokenId uint256 ID of the token to be minted
*/
function _mint(address to, uint256 tokenId) internal virtual {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_beforeTokenTransfer(address(0), to, tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(address(0), to, tokenId);
}
/**
* @dev Internal function to burn a specific token.
* Reverts if the token does not exist.
* @param tokenId uint256 ID of the token being burned
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId);
// Clear approvals
_approve(address(0), tokenId);
// Clear metadata (if any)
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
_holderTokens[owner].remove(tokenId);
_tokenOwners.remove(tokenId);
emit Transfer(owner, address(0), tokenId);
}
/**
* @dev Internal function to transfer ownership of a given token ID to another address.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
* @param from current owner of the token
* @param to address to receive the ownership of the given token ID
* @param tokenId uint256 ID of the token to be transferred
*/
function _transfer(address from, address to, uint256 tokenId) internal virtual {
require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId);
// Clear approvals from the previous owner
_approve(address(0), tokenId);
_holderTokens[from].remove(tokenId);
_holderTokens[to].add(tokenId);
_tokenOwners.set(tokenId, to);
emit Transfer(from, to, tokenId);
}
/**
* @dev Internal function to set the token URI for a given token.
*
* Reverts if the token ID does not exist.
*
* TIP: If all token IDs share a prefix (for example, if your URIs look like
* `https://api.myproject.com/token/<id>`), use {_setBaseURI} to store
* it and save gas.
*/
function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal virtual {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = _tokenURI;
}
/**
* @dev Internal function to set the base URI for all token IDs. It is
* automatically added as a prefix to the value returned in {tokenURI},
* or to the token ID if {tokenURI} is empty.
*/
function _setBaseURI(string memory baseURI_) internal virtual {
_baseURI = baseURI_;
}
/**
* @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
* The call is not executed if the target address is not a contract.
*
* @param from address representing the previous owner of the given token ID
* @param to target address that will receive the tokens
* @param tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return bool whether the call correctly returned the expected magic value
*/
function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
private returns (bool)
{
if (!to.isContract()) {
return true;
}
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = to.call(abi.encodeWithSelector(
IERC721Receiver(to).onERC721Received.selector,
_msgSender(),
from,
tokenId,
_data
));
if (!success) {
if (returndata.length > 0) {
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert("ERC721: transfer to non ERC721Receiver implementer");
}
} else {
bytes4 retval = abi.decode(returndata, (bytes4));
return (retval == _ERC721_RECEIVED);
}
}
function _approve(address to, uint256 tokenId) private {
_tokenApprovals[tokenId] = to;
emit Approval(ownerOf(tokenId), to, tokenId);
}
/**
* @dev Hook that is called before any token transfer. This includes minting
* and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, ``from``'s `tokenId` will be
* transferred to `to`.
* - when `from` is zero, `tokenId` will be minted for `to`.
* - when `to` is zero, ``from``'s `tokenId` 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 tokenId) internal virtual { }
uint256[41] private __gap;
}
pragma solidity ^0.6.0;
import "./ERC721.sol";
import "../../utils/Pausable.sol";
import "../../Initializable.sol";
/**
* @dev ERC721 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*/
abstract contract ERC721PausableUpgradeSafe is Initializable, ERC721UpgradeSafe, PausableUpgradeSafe {
function __ERC721Pausable_init() internal initializer {
__Context_init_unchained();
__ERC165_init_unchained();
__Pausable_init_unchained();
__ERC721Pausable_init_unchained();
}
function __ERC721Pausable_init_unchained() internal initializer {
}
/**
* @dev See {ERC721-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override {
super._beforeTokenTransfer(from, to, tokenId);
require(!paused(), "ERC721Pausable: token transfer while paused");
}
uint256[50] private __gap;
}
pragma solidity ^0.6.2;
import "../../introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of NFTs in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the NFT specified by `tokenId`.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
* another (`to`).
*
*
*
* Requirements:
* - `from`, `to` cannot be zero.
* - `tokenId` must be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this
* NFT by either {approve} or {setApprovalForAll}.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
* another (`to`).
*
* Requirements:
* - If the caller is not `from`, it must be approved to move this NFT by
* either {approve} or {setApprovalForAll}.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
function approve(address to, uint256 tokenId) external;
function getApproved(uint256 tokenId) external view returns (address operator);
function setApprovalForAll(address operator, bool _approved) external;
function isApprovedForAll(address owner, address operator) external view returns (bool);
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
}
pragma solidity ^0.6.2;
import "./IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Enumerable is IERC721 {
function totalSupply() external view returns (uint256);
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);
function tokenByIndex(uint256 index) external view returns (uint256);
}
pragma solidity ^0.6.2;
import "./IERC721.sol";
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function tokenURI(uint256 tokenId) external view returns (string memory);
}
pragma solidity ^0.6.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @notice Handle the receipt of an NFT
* @dev The ERC721 smart contract calls this function on the recipient
* after a {IERC721-safeTransferFrom}. This function MUST return the function selector,
* otherwise the caller will revert the transaction. The selector to be
* returned can be obtained as `this.onERC721Received.selector`. This
* function MAY throw to revert and reject the transfer.
* Note: the ERC721 contract address is always the message sender.
* @param operator The address which called `safeTransferFrom` function
* @param from The address which previously owned the token
* @param tokenId The NFT identifier which is being transferred
* @param data Additional data with no specified format
* @return bytes4 `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
*/
function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data)
external returns (bytes4);
}
pragma solidity ^0.6.2;
/**
* @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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash := extcodehash(account) }
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
}
pragma solidity ^0.6.0;
import "../math/SafeMath.sol";
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
* of elements in a mapping, issuing ERC721 ids, or counting request ids.
*
* Include with `using Counters for Counters.Counter;`
* Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the {SafeMath}
* overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never
* directly accessed.
*/
library Counters {
using SafeMath for uint256;
struct Counter {
// This variable should never be directly accessed by users of the library: interactions must be restricted to
// the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
// this feature: see https://github.com/ethereum/solidity/issues/4637
uint256 _value; // default: 0
}
function current(Counter storage counter) internal view returns (uint256) {
return counter._value;
}
function increment(Counter storage counter) internal {
// The {SafeMath} overflow check can be skipped here, see the comment at the top
counter._value += 1;
}
function decrement(Counter storage counter) internal {
counter._value = counter._value.sub(1);
}
}
pragma solidity ^0.6.0;
/**
* @dev Library for managing an enumerable variant of Solidity's
* https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`]
* type.
*
* Maps have the following properties:
*
* - Entries are added, removed, and checked for existence in constant time
* (O(1)).
* - Entries are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableMap for EnumerableMap.UintToAddressMap;
*
* // Declare a set state variable
* EnumerableMap.UintToAddressMap private myMap;
* }
* ```
*
* As of v3.0.0, only maps of type `uint256 -> address` (`UintToAddressMap`) are
* supported.
*/
library EnumerableMap {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Map type with
// bytes32 keys and values.
// The Map implementation uses private functions, and user-facing
// implementations (such as Uint256ToAddressMap) are just wrappers around
// the underlying Map.
// This means that we can only create new EnumerableMaps for types that fit
// in bytes32.
struct MapEntry {
bytes32 _key;
bytes32 _value;
}
struct Map {
// Storage of map keys and values
MapEntry[] _entries;
// Position of the entry defined by a key in the `entries` array, plus 1
// because index 0 means a key is not in the map.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function _set(Map storage map, bytes32 key, bytes32 value) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex == 0) { // Equivalent to !contains(map, key)
map._entries.push(MapEntry({ _key: key, _value: value }));
// The entry is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
map._indexes[key] = map._entries.length;
return true;
} else {
map._entries[keyIndex - 1]._value = value;
return false;
}
}
/**
* @dev Removes a key-value pair from a map. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function _remove(Map storage map, bytes32 key) private returns (bool) {
// We read and store the key's index to prevent multiple reads from the same storage slot
uint256 keyIndex = map._indexes[key];
if (keyIndex != 0) { // Equivalent to contains(map, key)
// To delete a key-value pair from the _entries array in O(1), we swap the entry to delete with the last one
// in the array, and then remove the last entry (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = keyIndex - 1;
uint256 lastIndex = map._entries.length - 1;
// When the entry to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
MapEntry storage lastEntry = map._entries[lastIndex];
// Move the last entry to the index where the entry to delete is
map._entries[toDeleteIndex] = lastEntry;
// Update the index for the moved entry
map._indexes[lastEntry._key] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved entry was stored
map._entries.pop();
// Delete the index for the deleted slot
delete map._indexes[key];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function _contains(Map storage map, bytes32 key) private view returns (bool) {
return map._indexes[key] != 0;
}
/**
* @dev Returns the number of key-value pairs in the map. O(1).
*/
function _length(Map storage map) private view returns (uint256) {
return map._entries.length;
}
/**
* @dev Returns the key-value pair stored at position `index` in the map. O(1).
*
* Note that there are no guarantees on the ordering of entries inside the
* array, and it may change when more entries are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Map storage map, uint256 index) private view returns (bytes32, bytes32) {
require(map._entries.length > index, "EnumerableMap: index out of bounds");
MapEntry storage entry = map._entries[index];
return (entry._key, entry._value);
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function _get(Map storage map, bytes32 key) private view returns (bytes32) {
return _get(map, key, "EnumerableMap: nonexistent key");
}
/**
* @dev Same as {_get}, with a custom error message when `key` is not in the map.
*/
function _get(Map storage map, bytes32 key, string memory errorMessage) private view returns (bytes32) {
uint256 keyIndex = map._indexes[key];
require(keyIndex != 0, errorMessage); // Equivalent to contains(map, key)
return map._entries[keyIndex - 1]._value; // All indexes are 1-based
}
// UintToAddressMap
struct UintToAddressMap {
Map _inner;
}
/**
* @dev Adds a key-value pair to a map, or updates the value for an existing
* key. O(1).
*
* Returns true if the key was added to the map, that is if it was not
* already present.
*/
function set(UintToAddressMap storage map, uint256 key, address value) internal returns (bool) {
return _set(map._inner, bytes32(key), bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the key was removed from the map, that is if it was present.
*/
function remove(UintToAddressMap storage map, uint256 key) internal returns (bool) {
return _remove(map._inner, bytes32(key));
}
/**
* @dev Returns true if the key is in the map. O(1).
*/
function contains(UintToAddressMap storage map, uint256 key) internal view returns (bool) {
return _contains(map._inner, bytes32(key));
}
/**
* @dev Returns the number of elements in the map. O(1).
*/
function length(UintToAddressMap storage map) internal view returns (uint256) {
return _length(map._inner);
}
/**
* @dev Returns the element stored at position `index` in the set. O(1).
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintToAddressMap storage map, uint256 index) internal view returns (uint256, address) {
(bytes32 key, bytes32 value) = _at(map._inner, index);
return (uint256(key), address(uint256(value)));
}
/**
* @dev Returns the value associated with `key`. O(1).
*
* Requirements:
*
* - `key` must be in the map.
*/
function get(UintToAddressMap storage map, uint256 key) internal view returns (address) {
return address(uint256(_get(map._inner, bytes32(key))));
}
/**
* @dev Same as {get}, with a custom error message when `key` is not in the map.
*/
function get(UintToAddressMap storage map, uint256 key, string memory errorMessage) internal view returns (address) {
return address(uint256(_get(map._inner, bytes32(key), errorMessage)));
}
}
pragma solidity ^0.6.0;
/**
* @dev Library for managing
* https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
* types.
*
* Sets have the following properties:
*
* - Elements are added, removed, and checked for existence in constant time
* (O(1)).
* - Elements are enumerated in O(n). No guarantees are made on the ordering.
*
* ```
* contract Example {
* // Add the library methods
* using EnumerableSet for EnumerableSet.AddressSet;
*
* // Declare a set state variable
* EnumerableSet.AddressSet private mySet;
* }
* ```
*
* As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
* (`UintSet`) are supported.
*/
library EnumerableSet {
// To implement this library for multiple types with as little code
// repetition as possible, we write it in terms of a generic Set type with
// bytes32 values.
// The Set implementation uses private functions, and user-facing
// implementations (such as AddressSet) are just wrappers around the
// underlying Set.
// This means that we can only create new EnumerableSets for types that fit
// in bytes32.
struct Set {
// Storage of set values
bytes32[] _values;
// Position of the value in the `values` array, plus 1 because index 0
// means a value is not in the set.
mapping (bytes32 => uint256) _indexes;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function _add(Set storage set, bytes32 value) private returns (bool) {
if (!_contains(set, value)) {
set._values.push(value);
// The value is stored at length-1, but we add 1 to all indexes
// and use 0 as a sentinel value
set._indexes[value] = set._values.length;
return true;
} else {
return false;
}
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function _remove(Set storage set, bytes32 value) private returns (bool) {
// We read and store the value's index to prevent multiple reads from the same storage slot
uint256 valueIndex = set._indexes[value];
if (valueIndex != 0) { // Equivalent to contains(set, value)
// To delete an element from the _values array in O(1), we swap the element to delete with the last one in
// the array, and then remove the last element (sometimes called as 'swap and pop').
// This modifies the order of the array, as noted in {at}.
uint256 toDeleteIndex = valueIndex - 1;
uint256 lastIndex = set._values.length - 1;
// When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
// so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.
bytes32 lastvalue = set._values[lastIndex];
// Move the last value to the index where the value to delete is
set._values[toDeleteIndex] = lastvalue;
// Update the index for the moved value
set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based
// Delete the slot where the moved value was stored
set._values.pop();
// Delete the index for the deleted slot
delete set._indexes[value];
return true;
} else {
return false;
}
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function _contains(Set storage set, bytes32 value) private view returns (bool) {
return set._indexes[value] != 0;
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function _length(Set storage set) private view returns (uint256) {
return set._values.length;
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function _at(Set storage set, uint256 index) private view returns (bytes32) {
require(set._values.length > index, "EnumerableSet: index out of bounds");
return set._values[index];
}
// AddressSet
struct AddressSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(AddressSet storage set, address value) internal returns (bool) {
return _add(set._inner, bytes32(uint256(value)));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(AddressSet storage set, address value) internal returns (bool) {
return _remove(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(AddressSet storage set, address value) internal view returns (bool) {
return _contains(set._inner, bytes32(uint256(value)));
}
/**
* @dev Returns the number of values in the set. O(1).
*/
function length(AddressSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(AddressSet storage set, uint256 index) internal view returns (address) {
return address(uint256(_at(set._inner, index)));
}
// UintSet
struct UintSet {
Set _inner;
}
/**
* @dev Add a value to a set. O(1).
*
* Returns true if the value was added to the set, that is if it was not
* already present.
*/
function add(UintSet storage set, uint256 value) internal returns (bool) {
return _add(set._inner, bytes32(value));
}
/**
* @dev Removes a value from a set. O(1).
*
* Returns true if the value was removed from the set, that is if it was
* present.
*/
function remove(UintSet storage set, uint256 value) internal returns (bool) {
return _remove(set._inner, bytes32(value));
}
/**
* @dev Returns true if the value is in the set. O(1).
*/
function contains(UintSet storage set, uint256 value) internal view returns (bool) {
return _contains(set._inner, bytes32(value));
}
/**
* @dev Returns the number of values on the set. O(1).
*/
function length(UintSet storage set) internal view returns (uint256) {
return _length(set._inner);
}
/**
* @dev Returns the value stored at position `index` in the set. O(1).
*
* Note that there are no guarantees on the ordering of values inside the
* array, and it may change when more values are added or removed.
*
* Requirements:
*
* - `index` must be strictly less than {length}.
*/
function at(UintSet storage set, uint256 index) internal view returns (uint256) {
return uint256(_at(set._inner, index));
}
}
pragma solidity ^0.6.0;
import "../GSN/Context.sol";
import "../Initializable.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
contract PausableUpgradeSafe is Initializable, ContextUpgradeSafe {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
function __Pausable_init() internal initializer {
__Context_init_unchained();
__Pausable_init_unchained();
}
function __Pausable_init_unchained() internal initializer {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!_paused, "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(_paused, "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
uint256[49] private __gap;
}
pragma solidity ^0.6.0;
import "../Initializable.sol";
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
contract ReentrancyGuardUpgradeSafe is Initializable {
bool private _notEntered;
function __ReentrancyGuard_init() internal initializer {
__ReentrancyGuard_init_unchained();
}
function __ReentrancyGuard_init_unchained() internal initializer {
// Storing an initial non-zero value makes deployment a bit more
// expensive, but in exchange the refund on every call to nonReentrant
// will be lower in amount. Since refunds are capped to a percetange of
// the total transaction's gas, it is best to keep them low in cases
// like this one, to increase the likelihood of the full refund coming
// into effect.
_notEntered = true;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and make it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
// On the first call to nonReentrant, _notEntered will be true
require(_notEntered, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_notEntered = false;
_;
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_notEntered = true;
}
uint256[49] private __gap;
}
pragma solidity ^0.6.0;
/**
* @dev String operations.
*/
library Strings {
/**
* @dev Converts a `uint256` to its ASCII `string` representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
uint256 index = digits - 1;
temp = value;
while (temp != 0) {
buffer[index--] = byte(uint8(48 + temp % 10));
temp /= 10;
}
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
// solhint-disable
/*
This is copied from OZ preset: https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/blob/release-v3.0.0/contracts/presets/ERC721PresetMinterPauserAutoId.sol
Alterations:
* Make the counter public, so that we can use it in our custom mint function
* Removed ERC721Burnable parent contract, but added our own custom burn function.
* Removed original "mint" function, because we have a custom one.
* Removed default initialization functions, because they set msg.sender as the owner, which
we do not want, because we use a deployer account, which is separate from the protocol owner.
*/
pragma solidity 0.6.12;
import "@openzeppelin/contracts-ethereum-package/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/GSN/Context.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/utils/Counters.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC721/ERC721Pausable.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/Initializable.sol";
/**
* @dev {ERC721} token, including:
*
* - ability for holders to burn (destroy) their tokens
* - a minter role that allows for token minting (creation)
* - a pauser role that allows to stop all token transfers
* - token ID and URI autogeneration
*
* This contract uses {AccessControl} to lock permissioned functions using the
* different roles - head to its documentation for details.
*
* The account that deploys the contract will be granted the minter and pauser
* roles, as well as the default admin role, which will let it grant both minter
* and pauser roles to aother accounts
*/
contract ERC721PresetMinterPauserAutoIdUpgradeSafe is
Initializable,
ContextUpgradeSafe,
AccessControlUpgradeSafe,
ERC721PausableUpgradeSafe
{
using Counters for Counters.Counter;
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
Counters.Counter public _tokenIdTracker;
/**
* @dev Pauses all token transfers.
*
* See {ERC721Pausable} and {Pausable-_pause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function pause() public {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have pauser role to pause");
_pause();
}
/**
* @dev Unpauses all token transfers.
*
* See {ERC721Pausable} and {Pausable-_unpause}.
*
* Requirements:
*
* - the caller must have the `PAUSER_ROLE`.
*/
function unpause() public {
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have pauser role to unpause");
_unpause();
}
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId
) internal virtual override(ERC721PausableUpgradeSafe) {
super._beforeTokenTransfer(from, to, tokenId);
}
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface IBackerRewards {
function allocateRewards(uint256 _interestPaymentAmount) external;
function onTranchedPoolDrawdown(uint256 sliceIndex) external;
function setPoolTokenAccRewardsPerPrincipalDollarAtMint(address poolAddress, uint256 tokenId) external;
}
// SPDX-License-Identifier: MIT
// Taken from https://github.com/compound-finance/compound-protocol/blob/master/contracts/CTokenInterfaces.sol
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "./IERC20withDec.sol";
interface ICUSDCContract is IERC20withDec {
/*** User Interface ***/
function mint(uint256 mintAmount) external returns (uint256);
function redeem(uint256 redeemTokens) external returns (uint256);
function redeemUnderlying(uint256 redeemAmount) external returns (uint256);
function borrow(uint256 borrowAmount) external returns (uint256);
function repayBorrow(uint256 repayAmount) external returns (uint256);
function repayBorrowBehalf(address borrower, uint256 repayAmount) external returns (uint256);
function liquidateBorrow(
address borrower,
uint256 repayAmount,
address cTokenCollateral
) external returns (uint256);
function getAccountSnapshot(address account)
external
view
returns (
uint256,
uint256,
uint256,
uint256
);
function balanceOfUnderlying(address owner) external returns (uint256);
function exchangeRateCurrent() external returns (uint256);
/*** Admin Functions ***/
function _addReserves(uint256 addAmount) external returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC721/IERC721.sol";
import "../interfaces/IERC20withDec.sol";
interface ICommunityRewards is IERC721 {
function rewardsToken() external view returns (IERC20withDec);
function claimableRewards(uint256 tokenId) external view returns (uint256 rewards);
function totalVestedAt(
uint256 start,
uint256 end,
uint256 granted,
uint256 cliffLength,
uint256 vestingInterval,
uint256 revokedAt,
uint256 time
) external pure returns (uint256 rewards);
function grant(
address recipient,
uint256 amount,
uint256 vestingLength,
uint256 cliffLength,
uint256 vestingInterval
) external returns (uint256 tokenId);
function loadRewards(uint256 rewards) external;
function revokeGrant(uint256 tokenId) external;
function getReward(uint256 tokenId) external;
event RewardAdded(uint256 reward);
event Granted(
address indexed user,
uint256 indexed tokenId,
uint256 amount,
uint256 vestingLength,
uint256 cliffLength,
uint256 vestingInterval
);
event GrantRevoked(uint256 indexed tokenId, uint256 totalUnvested);
event RewardPaid(address indexed user, uint256 indexed tokenId, uint256 reward);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
abstract contract ICreditDesk {
uint256 public totalWritedowns;
uint256 public totalLoansOutstanding;
function setUnderwriterGovernanceLimit(address underwriterAddress, uint256 limit) external virtual;
function drawdown(address creditLineAddress, uint256 amount) external virtual;
function pay(address creditLineAddress, uint256 amount) external virtual;
function assessCreditLine(address creditLineAddress) external virtual;
function applyPayment(address creditLineAddress, uint256 amount) external virtual;
function getNextPaymentAmount(address creditLineAddress, uint256 asOfBLock) external view virtual returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface ICreditLine {
function borrower() external view returns (address);
function limit() external view returns (uint256);
function maxLimit() external view returns (uint256);
function interestApr() external view returns (uint256);
function paymentPeriodInDays() external view returns (uint256);
function principalGracePeriodInDays() external view returns (uint256);
function termInDays() external view returns (uint256);
function lateFeeApr() external view returns (uint256);
function isLate() external view returns (bool);
function withinPrincipalGracePeriod() external view returns (bool);
// Accounting variables
function balance() external view returns (uint256);
function interestOwed() external view returns (uint256);
function principalOwed() external view returns (uint256);
function termEndTime() external view returns (uint256);
function nextDueTime() external view returns (uint256);
function interestAccruedAsOf() external view returns (uint256);
function lastFullPaymentTime() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
// Taken from https://github.com/compound-finance/compound-protocol/blob/master/contracts/CTokenInterfaces.sol
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface ICurveLP {
function token() external view returns (address);
function get_virtual_price() external view returns (uint256);
function calc_token_amount(uint256[2] calldata amounts) external view returns (uint256);
function add_liquidity(
uint256[2] calldata amounts,
uint256 min_mint_amount,
bool use_eth,
address receiver
) external returns (uint256);
function balances(uint256 arg0) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/IERC20.sol";
/*
Only addition is the `decimals` function, which we need, and which both our Fidu and USDC use, along with most ERC20's.
*/
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20withDec is IERC20 {
/**
* @dev Returns the number of decimals used for the token
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "./IERC20withDec.sol";
interface IFidu is IERC20withDec {
function mintTo(address to, uint256 amount) external;
function burnFrom(address to, uint256 amount) external;
function renounceRole(bytes32 role, address account) external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
abstract contract IGo {
uint256 public constant ID_TYPE_0 = 0;
uint256 public constant ID_TYPE_1 = 1;
uint256 public constant ID_TYPE_2 = 2;
uint256 public constant ID_TYPE_3 = 3;
uint256 public constant ID_TYPE_4 = 4;
uint256 public constant ID_TYPE_5 = 5;
uint256 public constant ID_TYPE_6 = 6;
uint256 public constant ID_TYPE_7 = 7;
uint256 public constant ID_TYPE_8 = 8;
uint256 public constant ID_TYPE_9 = 9;
uint256 public constant ID_TYPE_10 = 10;
/// @notice Returns the address of the UniqueIdentity contract.
function uniqueIdentity() external virtual returns (address);
function go(address account) public view virtual returns (bool);
function goOnlyIdTypes(address account, uint256[] calldata onlyIdTypes) public view virtual returns (bool);
function goSeniorPool(address account) public view virtual returns (bool);
function updateGoldfinchConfig() external virtual;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface IGoldfinchConfig {
function getNumber(uint256 index) external returns (uint256);
function getAddress(uint256 index) external returns (address);
function setAddress(uint256 index, address newAddress) external returns (address);
function setNumber(uint256 index, uint256 newNumber) external returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface IGoldfinchFactory {
function createCreditLine() external returns (address);
function createBorrower(address owner) external returns (address);
function createPool(
address _borrower,
uint256 _juniorFeePercent,
uint256 _limit,
uint256 _interestApr,
uint256 _paymentPeriodInDays,
uint256 _termInDays,
uint256 _lateFeeApr,
uint256[] calldata _allowedUIDTypes
) external returns (address);
function createMigratedPool(
address _borrower,
uint256 _juniorFeePercent,
uint256 _limit,
uint256 _interestApr,
uint256 _paymentPeriodInDays,
uint256 _termInDays,
uint256 _lateFeeApr,
uint256[] calldata _allowedUIDTypes
) external returns (address);
function updateGoldfinchConfig() external;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
abstract contract IPool {
uint256 public sharePrice;
function deposit(uint256 amount) external virtual;
function withdraw(uint256 usdcAmount) external virtual;
function withdrawInFidu(uint256 fiduAmount) external virtual;
function collectInterestAndPrincipal(
address from,
uint256 interest,
uint256 principal
) public virtual;
function transferFrom(
address from,
address to,
uint256 amount
) public virtual returns (bool);
function drawdown(address to, uint256 amount) public virtual returns (bool);
function sweepToCompound() public virtual;
function sweepFromCompound() public virtual;
function distributeLosses(address creditlineAddress, int256 writedownDelta) external virtual;
function assets() public view virtual returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC721/IERC721.sol";
interface IPoolTokens is IERC721 {
event TokenMinted(
address indexed owner,
address indexed pool,
uint256 indexed tokenId,
uint256 amount,
uint256 tranche
);
event TokenRedeemed(
address indexed owner,
address indexed pool,
uint256 indexed tokenId,
uint256 principalRedeemed,
uint256 interestRedeemed,
uint256 tranche
);
event TokenBurned(address indexed owner, address indexed pool, uint256 indexed tokenId);
struct TokenInfo {
address pool;
uint256 tranche;
uint256 principalAmount;
uint256 principalRedeemed;
uint256 interestRedeemed;
}
struct MintParams {
uint256 principalAmount;
uint256 tranche;
}
function mint(MintParams calldata params, address to) external returns (uint256);
function redeem(
uint256 tokenId,
uint256 principalRedeemed,
uint256 interestRedeemed
) external;
function withdrawPrincipal(uint256 tokenId, uint256 principalAmount) external;
function burn(uint256 tokenId) external;
function onPoolCreated(address newPool) external;
function getTokenInfo(uint256 tokenId) external view returns (TokenInfo memory);
function validPool(address sender) external view returns (bool);
function isApprovedOrOwner(address spender, uint256 tokenId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "./ITranchedPool.sol";
abstract contract ISeniorPool {
uint256 public sharePrice;
uint256 public totalLoansOutstanding;
uint256 public totalWritedowns;
function deposit(uint256 amount) external virtual returns (uint256 depositShares);
function depositWithPermit(
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external virtual returns (uint256 depositShares);
function withdraw(uint256 usdcAmount) external virtual returns (uint256 amount);
function withdrawInFidu(uint256 fiduAmount) external virtual returns (uint256 amount);
function sweepToCompound() public virtual;
function sweepFromCompound() public virtual;
function invest(ITranchedPool pool) public virtual;
function estimateInvestment(ITranchedPool pool) public view virtual returns (uint256);
function redeem(uint256 tokenId) public virtual;
function writedown(uint256 tokenId) public virtual;
function calculateWritedown(uint256 tokenId) public view virtual returns (uint256 writedownAmount);
function assets() public view virtual returns (uint256);
function getNumShares(uint256 amount) public view virtual returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "./ISeniorPool.sol";
import "./ITranchedPool.sol";
abstract contract ISeniorPoolStrategy {
function getLeverageRatio(ITranchedPool pool) public view virtual returns (uint256);
function invest(ISeniorPool seniorPool, ITranchedPool pool) public view virtual returns (uint256 amount);
function estimateInvestment(ISeniorPool seniorPool, ITranchedPool pool) public view virtual returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
interface IStakingRewards {
function unstake(uint256 tokenId, uint256 amount) external;
function addToStake(uint256 tokenId, uint256 amount) external;
function stakedBalanceOf(uint256 tokenId) external view returns (uint256);
function depositToCurveAndStakeFrom(
address nftRecipient,
uint256 fiduAmount,
uint256 usdcAmount
) external;
function kick(uint256 tokenId) external;
function accumulatedRewardsPerToken() external view returns (uint256);
function lastUpdateTime() external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "./IV2CreditLine.sol";
abstract contract ITranchedPool {
IV2CreditLine public creditLine;
uint256 public createdAt;
enum Tranches {
Reserved,
Senior,
Junior
}
struct TrancheInfo {
uint256 id;
uint256 principalDeposited;
uint256 principalSharePrice;
uint256 interestSharePrice;
uint256 lockedUntil;
}
struct PoolSlice {
TrancheInfo seniorTranche;
TrancheInfo juniorTranche;
uint256 totalInterestAccrued;
uint256 principalDeployed;
}
struct SliceInfo {
uint256 reserveFeePercent;
uint256 interestAccrued;
uint256 principalAccrued;
}
struct ApplyResult {
uint256 interestRemaining;
uint256 principalRemaining;
uint256 reserveDeduction;
uint256 oldInterestSharePrice;
uint256 oldPrincipalSharePrice;
}
function initialize(
address _config,
address _borrower,
uint256 _juniorFeePercent,
uint256 _limit,
uint256 _interestApr,
uint256 _paymentPeriodInDays,
uint256 _termInDays,
uint256 _lateFeeApr,
uint256 _principalGracePeriodInDays,
uint256 _fundableAt,
uint256[] calldata _allowedUIDTypes
) public virtual;
function getTranche(uint256 tranche) external view virtual returns (TrancheInfo memory);
function pay(uint256 amount) external virtual;
function lockJuniorCapital() external virtual;
function lockPool() external virtual;
function initializeNextSlice(uint256 _fundableAt) external virtual;
function totalJuniorDeposits() external view virtual returns (uint256);
function drawdown(uint256 amount) external virtual;
function setFundableAt(uint256 timestamp) external virtual;
function deposit(uint256 tranche, uint256 amount) external virtual returns (uint256 tokenId);
function assess() external virtual;
function depositWithPermit(
uint256 tranche,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external virtual returns (uint256 tokenId);
function availableToWithdraw(uint256 tokenId)
external
view
virtual
returns (uint256 interestRedeemable, uint256 principalRedeemable);
function withdraw(uint256 tokenId, uint256 amount)
external
virtual
returns (uint256 interestWithdrawn, uint256 principalWithdrawn);
function withdrawMax(uint256 tokenId)
external
virtual
returns (uint256 interestWithdrawn, uint256 principalWithdrawn);
function withdrawMultiple(uint256[] calldata tokenIds, uint256[] calldata amounts) external virtual;
function numSlices() external view virtual returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "./ICreditLine.sol";
abstract contract IV2CreditLine is ICreditLine {
function principal() external view virtual returns (uint256);
function totalInterestAccrued() external view virtual returns (uint256);
function termStartTime() external view virtual returns (uint256);
function setLimit(uint256 newAmount) external virtual;
function setMaxLimit(uint256 newAmount) external virtual;
function setBalance(uint256 newBalance) external virtual;
function setPrincipal(uint256 _principal) external virtual;
function setTotalInterestAccrued(uint256 _interestAccrued) external virtual;
function drawdown(uint256 amount) external virtual;
function assess()
external
virtual
returns (
uint256,
uint256,
uint256
);
function initialize(
address _config,
address owner,
address _borrower,
uint256 _limit,
uint256 _interestApr,
uint256 _paymentPeriodInDays,
uint256 _termInDays,
uint256 _lateFeeApr,
uint256 _principalGracePeriodInDays
) public virtual;
function setTermEndTime(uint256 newTermEndTime) external virtual;
function setNextDueTime(uint256 newNextDueTime) external virtual;
function setInterestOwed(uint256 newInterestOwed) external virtual;
function setPrincipalOwed(uint256 newPrincipalOwed) external virtual;
function setInterestAccruedAsOf(uint256 newInterestAccruedAsOf) external virtual;
function setWritedownAmount(uint256 newWritedownAmount) external virtual;
function setLastFullPaymentTime(uint256 newLastFullPaymentTime) external virtual;
function setLateFeeApr(uint256 newLateFeeApr) external virtual;
function updateGoldfinchConfig() external virtual;
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/math/Math.sol";
library CommunityRewardsVesting {
using SafeMath for uint256;
using CommunityRewardsVesting for Rewards;
/// @dev All time values in the Rewards struct (i.e. `startTime`, `endTime`,
/// `cliffLength`, `vestingInterval`, `revokedAt`) use the same units: seconds. All timestamp
/// values (i.e. `startTime`, `endTime`, `revokedAt`) are seconds since the unix epoch.
/// @dev `cliffLength` is the duration from the start of the grant, before which has elapsed
/// the vested amount remains 0.
/// @dev `vestingInterval` is the interval at which vesting occurs. If `vestingInterval` is not a
/// factor of `vestingLength`, rewards are fully vested at the time of the last whole `vestingInterval`.
struct Rewards {
uint256 totalGranted;
uint256 totalClaimed;
uint256 startTime;
uint256 endTime;
uint256 cliffLength;
uint256 vestingInterval;
uint256 revokedAt;
}
function claim(Rewards storage rewards, uint256 reward) internal {
rewards.totalClaimed = rewards.totalClaimed.add(reward);
}
function claimable(Rewards storage rewards) internal view returns (uint256) {
return claimable(rewards, block.timestamp);
}
function claimable(Rewards storage rewards, uint256 time) internal view returns (uint256) {
return rewards.totalVestedAt(time).sub(rewards.totalClaimed);
}
function totalUnvestedAt(Rewards storage rewards, uint256 time) internal view returns (uint256) {
return rewards.totalGranted.sub(rewards.totalVestedAt(time));
}
function totalVestedAt(Rewards storage rewards, uint256 time) internal view returns (uint256) {
return
getTotalVestedAt(
rewards.startTime,
rewards.endTime,
rewards.totalGranted,
rewards.cliffLength,
rewards.vestingInterval,
rewards.revokedAt,
time
);
}
function getTotalVestedAt(
uint256 start,
uint256 end,
uint256 granted,
uint256 cliffLength,
uint256 vestingInterval,
uint256 revokedAt,
uint256 time
) internal pure returns (uint256) {
if (time < start.add(cliffLength)) {
return 0;
}
if (end <= start) {
return granted;
}
uint256 elapsedVestingTimestamp = revokedAt > 0 ? Math.min(revokedAt, time) : time;
uint256 elapsedVestingUnits = (elapsedVestingTimestamp.sub(start)).div(vestingInterval);
uint256 totalVestingUnits = (end.sub(start)).div(vestingInterval);
return Math.min(granted.mul(elapsedVestingUnits).div(totalVestingUnits), granted);
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-ethereum-package/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/Initializable.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol";
import "./PauserPausable.sol";
/**
* @title BaseUpgradeablePausable contract
* @notice This is our Base contract that most other contracts inherit from. It includes many standard
* useful abilities like ugpradeability, pausability, access control, and re-entrancy guards.
* @author Goldfinch
*/
contract BaseUpgradeablePausable is
Initializable,
AccessControlUpgradeSafe,
PauserPausable,
ReentrancyGuardUpgradeSafe
{
bytes32 public constant OWNER_ROLE = keccak256("OWNER_ROLE");
using SafeMath for uint256;
// Pre-reserving a few slots in the base contract in case we need to add things in the future.
// This does not actually take up gas cost or storage cost, but it does reserve the storage slots.
// See OpenZeppelin's use of this pattern here:
// https://github.com/OpenZeppelin/openzeppelin-contracts-ethereum-package/blob/master/contracts/GSN/Context.sol#L37
uint256[50] private __gap1;
uint256[50] private __gap2;
uint256[50] private __gap3;
uint256[50] private __gap4;
// solhint-disable-next-line func-name-mixedcase
function __BaseUpgradeablePausable__init(address owner) public initializer {
require(owner != address(0), "Owner cannot be the zero address");
__AccessControl_init_unchained();
__Pausable_init_unchained();
__ReentrancyGuard_init_unchained();
_setupRole(OWNER_ROLE, owner);
_setupRole(PAUSER_ROLE, owner);
_setRoleAdmin(PAUSER_ROLE, OWNER_ROLE);
_setRoleAdmin(OWNER_ROLE, OWNER_ROLE);
}
function isAdmin() public view returns (bool) {
return hasRole(OWNER_ROLE, _msgSender());
}
modifier onlyAdmin() {
require(isAdmin(), "Must have admin role to perform this action");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "./GoldfinchConfig.sol";
import "../../interfaces/IPool.sol";
import "../../interfaces/IFidu.sol";
import "../../interfaces/ISeniorPool.sol";
import "../../interfaces/ISeniorPoolStrategy.sol";
import "../../interfaces/ICreditDesk.sol";
import "../../interfaces/IERC20withDec.sol";
import "../../interfaces/ICUSDCContract.sol";
import "../../interfaces/IPoolTokens.sol";
import "../../interfaces/IBackerRewards.sol";
import "../../interfaces/IGoldfinchFactory.sol";
import "../../interfaces/IGo.sol";
import "../../interfaces/IStakingRewards.sol";
import "../../interfaces/ICurveLP.sol";
/**
* @title ConfigHelper
* @notice A convenience library for getting easy access to other contracts and constants within the
* protocol, through the use of the GoldfinchConfig contract
* @author Goldfinch
*/
library ConfigHelper {
function getPool(GoldfinchConfig config) internal view returns (IPool) {
return IPool(poolAddress(config));
}
function getSeniorPool(GoldfinchConfig config) internal view returns (ISeniorPool) {
return ISeniorPool(seniorPoolAddress(config));
}
function getSeniorPoolStrategy(GoldfinchConfig config) internal view returns (ISeniorPoolStrategy) {
return ISeniorPoolStrategy(seniorPoolStrategyAddress(config));
}
function getUSDC(GoldfinchConfig config) internal view returns (IERC20withDec) {
return IERC20withDec(usdcAddress(config));
}
function getCreditDesk(GoldfinchConfig config) internal view returns (ICreditDesk) {
return ICreditDesk(creditDeskAddress(config));
}
function getFidu(GoldfinchConfig config) internal view returns (IFidu) {
return IFidu(fiduAddress(config));
}
function getFiduUSDCCurveLP(GoldfinchConfig config) internal view returns (ICurveLP) {
return ICurveLP(fiduUSDCCurveLPAddress(config));
}
function getCUSDCContract(GoldfinchConfig config) internal view returns (ICUSDCContract) {
return ICUSDCContract(cusdcContractAddress(config));
}
function getPoolTokens(GoldfinchConfig config) internal view returns (IPoolTokens) {
return IPoolTokens(poolTokensAddress(config));
}
function getBackerRewards(GoldfinchConfig config) internal view returns (IBackerRewards) {
return IBackerRewards(backerRewardsAddress(config));
}
function getGoldfinchFactory(GoldfinchConfig config) internal view returns (IGoldfinchFactory) {
return IGoldfinchFactory(goldfinchFactoryAddress(config));
}
function getGFI(GoldfinchConfig config) internal view returns (IERC20withDec) {
return IERC20withDec(gfiAddress(config));
}
function getGo(GoldfinchConfig config) internal view returns (IGo) {
return IGo(goAddress(config));
}
function getStakingRewards(GoldfinchConfig config) internal view returns (IStakingRewards) {
return IStakingRewards(stakingRewardsAddress(config));
}
function oneInchAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.OneInch));
}
function creditLineImplementationAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.CreditLineImplementation));
}
function trustedForwarderAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.TrustedForwarder));
}
function configAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.GoldfinchConfig));
}
function poolAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.Pool));
}
function poolTokensAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.PoolTokens));
}
function backerRewardsAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.BackerRewards));
}
function seniorPoolAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.SeniorPool));
}
function seniorPoolStrategyAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.SeniorPoolStrategy));
}
function creditDeskAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.CreditDesk));
}
function goldfinchFactoryAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.GoldfinchFactory));
}
function gfiAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.GFI));
}
function fiduAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.Fidu));
}
function fiduUSDCCurveLPAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.FiduUSDCCurveLP));
}
function cusdcContractAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.CUSDCContract));
}
function usdcAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.USDC));
}
function tranchedPoolAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.TranchedPoolImplementation));
}
function migratedTranchedPoolAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.MigratedTranchedPoolImplementation));
}
function reserveAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.TreasuryReserve));
}
function protocolAdminAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.ProtocolAdmin));
}
function borrowerImplementationAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.BorrowerImplementation));
}
function goAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.Go));
}
function stakingRewardsAddress(GoldfinchConfig config) internal view returns (address) {
return config.getAddress(uint256(ConfigOptions.Addresses.StakingRewards));
}
function getReserveDenominator(GoldfinchConfig config) internal view returns (uint256) {
return config.getNumber(uint256(ConfigOptions.Numbers.ReserveDenominator));
}
function getWithdrawFeeDenominator(GoldfinchConfig config) internal view returns (uint256) {
return config.getNumber(uint256(ConfigOptions.Numbers.WithdrawFeeDenominator));
}
function getLatenessGracePeriodInDays(GoldfinchConfig config) internal view returns (uint256) {
return config.getNumber(uint256(ConfigOptions.Numbers.LatenessGracePeriodInDays));
}
function getLatenessMaxDays(GoldfinchConfig config) internal view returns (uint256) {
return config.getNumber(uint256(ConfigOptions.Numbers.LatenessMaxDays));
}
function getDrawdownPeriodInSeconds(GoldfinchConfig config) internal view returns (uint256) {
return config.getNumber(uint256(ConfigOptions.Numbers.DrawdownPeriodInSeconds));
}
function getTransferRestrictionPeriodInDays(GoldfinchConfig config) internal view returns (uint256) {
return config.getNumber(uint256(ConfigOptions.Numbers.TransferRestrictionPeriodInDays));
}
function getLeverageRatio(GoldfinchConfig config) internal view returns (uint256) {
return config.getNumber(uint256(ConfigOptions.Numbers.LeverageRatio));
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
/**
* @title ConfigOptions
* @notice A central place for enumerating the configurable options of our GoldfinchConfig contract
* @author Goldfinch
*/
library ConfigOptions {
// NEVER EVER CHANGE THE ORDER OF THESE!
// You can rename or append. But NEVER change the order.
enum Numbers {
TransactionLimit,
TotalFundsLimit,
MaxUnderwriterLimit,
ReserveDenominator,
WithdrawFeeDenominator,
LatenessGracePeriodInDays,
LatenessMaxDays,
DrawdownPeriodInSeconds,
TransferRestrictionPeriodInDays,
LeverageRatio
}
enum Addresses {
Pool,
CreditLineImplementation,
GoldfinchFactory,
CreditDesk,
Fidu,
USDC,
TreasuryReserve,
ProtocolAdmin,
OneInch,
TrustedForwarder,
CUSDCContract,
GoldfinchConfig,
PoolTokens,
TranchedPoolImplementation,
SeniorPool,
SeniorPoolStrategy,
MigratedTranchedPoolImplementation,
BorrowerImplementation,
GFI,
Go,
BackerRewards,
StakingRewards,
FiduUSDCCurveLP
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "./BaseUpgradeablePausable.sol";
import "../../interfaces/IGoldfinchConfig.sol";
import "./ConfigOptions.sol";
/**
* @title GoldfinchConfig
* @notice This contract stores mappings of useful "protocol config state", giving a central place
* for all other contracts to access it. For example, the TransactionLimit, or the PoolAddress. These config vars
* are enumerated in the `ConfigOptions` library, and can only be changed by admins of the protocol.
* Note: While this inherits from BaseUpgradeablePausable, it is not deployed as an upgradeable contract (this
* is mostly to save gas costs of having each call go through a proxy)
* @author Goldfinch
*/
contract GoldfinchConfig is BaseUpgradeablePausable {
bytes32 public constant GO_LISTER_ROLE = keccak256("GO_LISTER_ROLE");
mapping(uint256 => address) public addresses;
mapping(uint256 => uint256) public numbers;
mapping(address => bool) public goList;
event AddressUpdated(address owner, uint256 index, address oldValue, address newValue);
event NumberUpdated(address owner, uint256 index, uint256 oldValue, uint256 newValue);
event GoListed(address indexed member);
event NoListed(address indexed member);
bool public valuesInitialized;
function initialize(address owner) public initializer {
require(owner != address(0), "Owner address cannot be empty");
__BaseUpgradeablePausable__init(owner);
_setupRole(GO_LISTER_ROLE, owner);
_setRoleAdmin(GO_LISTER_ROLE, OWNER_ROLE);
}
function setAddress(uint256 addressIndex, address newAddress) public onlyAdmin {
require(addresses[addressIndex] == address(0), "Address has already been initialized");
emit AddressUpdated(msg.sender, addressIndex, addresses[addressIndex], newAddress);
addresses[addressIndex] = newAddress;
}
function setNumber(uint256 index, uint256 newNumber) public onlyAdmin {
emit NumberUpdated(msg.sender, index, numbers[index], newNumber);
numbers[index] = newNumber;
}
function setTreasuryReserve(address newTreasuryReserve) public onlyAdmin {
uint256 key = uint256(ConfigOptions.Addresses.TreasuryReserve);
emit AddressUpdated(msg.sender, key, addresses[key], newTreasuryReserve);
addresses[key] = newTreasuryReserve;
}
function setSeniorPoolStrategy(address newStrategy) public onlyAdmin {
uint256 key = uint256(ConfigOptions.Addresses.SeniorPoolStrategy);
emit AddressUpdated(msg.sender, key, addresses[key], newStrategy);
addresses[key] = newStrategy;
}
function setCreditLineImplementation(address newAddress) public onlyAdmin {
uint256 key = uint256(ConfigOptions.Addresses.CreditLineImplementation);
emit AddressUpdated(msg.sender, key, addresses[key], newAddress);
addresses[key] = newAddress;
}
function setTranchedPoolImplementation(address newAddress) public onlyAdmin {
uint256 key = uint256(ConfigOptions.Addresses.TranchedPoolImplementation);
emit AddressUpdated(msg.sender, key, addresses[key], newAddress);
addresses[key] = newAddress;
}
function setBorrowerImplementation(address newAddress) public onlyAdmin {
uint256 key = uint256(ConfigOptions.Addresses.BorrowerImplementation);
emit AddressUpdated(msg.sender, key, addresses[key], newAddress);
addresses[key] = newAddress;
}
function setGoldfinchConfig(address newAddress) public onlyAdmin {
uint256 key = uint256(ConfigOptions.Addresses.GoldfinchConfig);
emit AddressUpdated(msg.sender, key, addresses[key], newAddress);
addresses[key] = newAddress;
}
function initializeFromOtherConfig(
address _initialConfig,
uint256 numbersLength,
uint256 addressesLength
) public onlyAdmin {
require(!valuesInitialized, "Already initialized values");
IGoldfinchConfig initialConfig = IGoldfinchConfig(_initialConfig);
for (uint256 i = 0; i < numbersLength; i++) {
setNumber(i, initialConfig.getNumber(i));
}
for (uint256 i = 0; i < addressesLength; i++) {
if (getAddress(i) == address(0)) {
setAddress(i, initialConfig.getAddress(i));
}
}
valuesInitialized = true;
}
/**
* @dev Adds a user to go-list
* @param _member address to add to go-list
*/
function addToGoList(address _member) public onlyGoListerRole {
goList[_member] = true;
emit GoListed(_member);
}
/**
* @dev removes a user from go-list
* @param _member address to remove from go-list
*/
function removeFromGoList(address _member) public onlyGoListerRole {
goList[_member] = false;
emit NoListed(_member);
}
/**
* @dev adds many users to go-list at once
* @param _members addresses to ad to go-list
*/
function bulkAddToGoList(address[] calldata _members) external onlyGoListerRole {
for (uint256 i = 0; i < _members.length; i++) {
addToGoList(_members[i]);
}
}
/**
* @dev removes many users from go-list at once
* @param _members addresses to remove from go-list
*/
function bulkRemoveFromGoList(address[] calldata _members) external onlyGoListerRole {
for (uint256 i = 0; i < _members.length; i++) {
removeFromGoList(_members[i]);
}
}
/*
Using custom getters in case we want to change underlying implementation later,
or add checks or validations later on.
*/
function getAddress(uint256 index) public view returns (address) {
return addresses[index];
}
function getNumber(uint256 index) public view returns (uint256) {
return numbers[index];
}
modifier onlyGoListerRole() {
require(hasRole(GO_LISTER_ROLE, _msgSender()), "Must have go-lister role to perform this action");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-ethereum-package/contracts/utils/Pausable.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/access/AccessControl.sol";
/**
* @title PauserPausable
* @notice Inheriting from OpenZeppelin's Pausable contract, this does small
* augmentations to make it work with a PAUSER_ROLE, leveraging the AccessControl contract.
* It is meant to be inherited.
* @author Goldfinch
*/
contract PauserPausable is AccessControlUpgradeSafe, PausableUpgradeSafe {
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
// solhint-disable-next-line func-name-mixedcase
function __PauserPausable__init() public initializer {
__Pausable_init_unchained();
}
/**
* @dev Pauses all functions guarded by Pause
*
* See {Pausable-_pause}.
*
* Requirements:
*
* - the caller must have the PAUSER_ROLE.
*/
function pause() public onlyPauserRole {
_pause();
}
/**
* @dev Unpauses the contract
*
* See {Pausable-_unpause}.
*
* Requirements:
*
* - the caller must have the Pauser role
*/
function unpause() public onlyPauserRole {
_unpause();
}
modifier onlyPauserRole() {
require(hasRole(PAUSER_ROLE, _msgSender()), "Must have pauser role to perform this action");
_;
}
}
// SPDX-License-Identifier: MIT
pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts-ethereum-package/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts-ethereum-package/contracts/utils/ReentrancyGuard.sol";
import "../external/ERC721PresetMinterPauserAutoId.sol";
import "../interfaces/IERC20withDec.sol";
import "../interfaces/ICommunityRewards.sol";
import "../protocol/core/GoldfinchConfig.sol";
import "../protocol/core/ConfigHelper.sol";
import "../library/CommunityRewardsVesting.sol";
contract CommunityRewards is ICommunityRewards, ERC721PresetMinterPauserAutoIdUpgradeSafe, ReentrancyGuardUpgradeSafe {
using SafeMath for uint256;
using SafeERC20 for IERC20withDec;
using ConfigHelper for GoldfinchConfig;
using CommunityRewardsVesting for CommunityRewardsVesting.Rewards;
/* ========== EVENTS ========== */
event GoldfinchConfigUpdated(address indexed who, address configAddress);
/* ========== STATE VARIABLES ========== */
bytes32 public constant OWNER_ROLE = keccak256("OWNER_ROLE");
bytes32 public constant DISTRIBUTOR_ROLE = keccak256("DISTRIBUTOR_ROLE");
GoldfinchConfig public config;
/// @notice Total rewards available for granting, denominated in `rewardsToken()`
uint256 public rewardsAvailable;
/// @notice Token launch time in seconds. This is used in vesting.
uint256 public tokenLaunchTimeInSeconds;
/// @dev NFT tokenId => rewards grant
mapping(uint256 => CommunityRewardsVesting.Rewards) public grants;
// solhint-disable-next-line func-name-mixedcase
function __initialize__(
address owner,
GoldfinchConfig _config,
uint256 _tokenLaunchTimeInSeconds
) external initializer {
require(owner != address(0) && address(_config) != address(0), "Owner and config addresses cannot be empty");
__Context_init_unchained();
__ERC165_init_unchained();
__ERC721_init_unchained("Goldfinch V2 Community Rewards Tokens", "GFI-V2-CR");
__ERC721Pausable_init_unchained();
__AccessControl_init_unchained();
__Pausable_init_unchained();
__ReentrancyGuard_init_unchained();
_setupRole(OWNER_ROLE, owner);
_setupRole(PAUSER_ROLE, owner);
_setupRole(DISTRIBUTOR_ROLE, owner);
_setRoleAdmin(OWNER_ROLE, OWNER_ROLE);
_setRoleAdmin(PAUSER_ROLE, OWNER_ROLE);
_setRoleAdmin(DISTRIBUTOR_ROLE, OWNER_ROLE);
tokenLaunchTimeInSeconds = _tokenLaunchTimeInSeconds;
config = _config;
}
/* ========== VIEWS ========== */
/// @notice The token being disbursed as rewards
function rewardsToken() public view override returns (IERC20withDec) {
return config.getGFI();
}
/// @notice Returns the rewards claimable by a given grant token, taking into
/// account vesting schedule.
/// @return rewards Amount of rewards denominated in `rewardsToken()`
function claimableRewards(uint256 tokenId) public view override returns (uint256 rewards) {
return grants[tokenId].claimable();
}
/// @notice Returns the rewards that will have vested for some grant with the given params.
/// @return rewards Amount of rewards denominated in `rewardsToken()`
function totalVestedAt(
uint256 start,
uint256 end,
uint256 granted,
uint256 cliffLength,
uint256 vestingInterval,
uint256 revokedAt,
uint256 time
) external pure override returns (uint256 rewards) {
return CommunityRewardsVesting.getTotalVestedAt(start, end, granted, cliffLength, vestingInterval, revokedAt, time);
}
/* ========== MUTATIVE, ADMIN-ONLY FUNCTIONS ========== */
/// @notice Transfer rewards from msg.sender, to be used for reward distribution
function loadRewards(uint256 rewards) external override onlyAdmin {
require(rewards > 0, "Cannot load 0 rewards");
rewardsAvailable = rewardsAvailable.add(rewards);
rewardsToken().safeTransferFrom(msg.sender, address(this), rewards);
emit RewardAdded(rewards);
}
/// @notice Revokes rewards that have not yet vested, for a grant. The unvested rewards are
/// now considered available for allocation in another grant.
/// @param tokenId The tokenId corresponding to the grant whose unvested rewards to revoke.
function revokeGrant(uint256 tokenId) external override whenNotPaused onlyAdmin {
CommunityRewardsVesting.Rewards storage grant = grants[tokenId];
require(grant.totalGranted > 0, "Grant not defined for token id");
require(grant.revokedAt == 0, "Grant has already been revoked");
uint256 totalUnvested = grant.totalUnvestedAt(block.timestamp);
require(totalUnvested > 0, "Grant has fully vested");
rewardsAvailable = rewardsAvailable.add(totalUnvested);
grant.revokedAt = block.timestamp;
emit GrantRevoked(tokenId, totalUnvested);
}
function setTokenLaunchTimeInSeconds(uint256 _tokenLaunchTimeInSeconds) external onlyAdmin {
tokenLaunchTimeInSeconds = _tokenLaunchTimeInSeconds;
}
/// @notice updates current config
function updateGoldfinchConfig() external onlyAdmin {
config = GoldfinchConfig(config.configAddress());
emit GoldfinchConfigUpdated(_msgSender(), address(config));
}
/* ========== MUTATIVE, NON-ADMIN-ONLY FUNCTIONS ========== */
/// @notice Grant rewards to a recipient. The recipient address receives an
/// an NFT representing their rewards grant. They can present the NFT to `getReward()`
/// to claim their rewards. Rewards vest over a schedule. If the given `vestingInterval`
/// is 0, then `vestingInterval` will be equal to `vestingLength`.
/// @param recipient The recipient of the grant.
/// @param amount The amount of `rewardsToken()` to grant.
/// @param vestingLength The duration (in seconds) over which the grant vests.
/// @param cliffLength The duration (in seconds) from the start of the grant, before which has elapsed
/// the vested amount remains 0.
/// @param vestingInterval The interval (in seconds) at which vesting occurs.
function grant(
address recipient,
uint256 amount,
uint256 vestingLength,
uint256 cliffLength,
uint256 vestingInterval
) external override nonReentrant whenNotPaused onlyDistributor returns (uint256 tokenId) {
return _grant(recipient, amount, vestingLength, cliffLength, vestingInterval);
}
function _grant(
address recipient,
uint256 amount,
uint256 vestingLength,
uint256 cliffLength,
uint256 vestingInterval
) internal returns (uint256 tokenId) {
require(amount > 0, "Cannot grant 0 amount");
require(cliffLength <= vestingLength, "Cliff length cannot exceed vesting length");
require(amount <= rewardsAvailable, "Cannot grant amount due to insufficient funds");
require(vestingInterval <= vestingLength, "Invalid vestingInterval");
if (vestingInterval == 0) {
vestingInterval = vestingLength;
}
rewardsAvailable = rewardsAvailable.sub(amount);
_tokenIdTracker.increment();
tokenId = _tokenIdTracker.current();
grants[tokenId] = CommunityRewardsVesting.Rewards({
totalGranted: amount,
totalClaimed: 0,
startTime: tokenLaunchTimeInSeconds,
endTime: tokenLaunchTimeInSeconds.add(vestingLength),
cliffLength: cliffLength,
vestingInterval: vestingInterval,
revokedAt: 0
});
_mint(recipient, tokenId);
emit Granted(recipient, tokenId, amount, vestingLength, cliffLength, vestingInterval);
return tokenId;
}
/// @notice Claim rewards for a given grant
/// @param tokenId A grant token ID
function getReward(uint256 tokenId) external override nonReentrant whenNotPaused {
require(ownerOf(tokenId) == msg.sender, "access denied");
uint256 reward = claimableRewards(tokenId);
if (reward > 0) {
grants[tokenId].claim(reward);
rewardsToken().safeTransfer(msg.sender, reward);
emit RewardPaid(msg.sender, tokenId, reward);
}
}
function totalUnclaimed(address owner) external view returns (uint256) {
uint256 result = 0;
for (uint256 i = 0; i < balanceOf(owner); i++) {
uint256 tokenId = tokenOfOwnerByIndex(owner, i);
result = result.add(_unclaimed(tokenId));
}
return result;
}
function unclaimed(uint256 tokenId) external view returns (uint256) {
return _unclaimed(tokenId);
}
function _unclaimed(uint256 tokenId) internal view returns (uint256) {
return grants[tokenId].totalGranted - grants[tokenId].totalClaimed;
}
/* ========== MODIFIERS ========== */
function isAdmin() public view returns (bool) {
return hasRole(OWNER_ROLE, _msgSender());
}
modifier onlyAdmin() {
require(isAdmin(), "Must have admin role to perform this action");
_;
}
function isDistributor() public view returns (bool) {
return hasRole(DISTRIBUTOR_ROLE, _msgSender());
}
modifier onlyDistributor() {
require(isDistributor(), "Must have distributor role to perform this action");
_;
}
}