Token rDPX Atlantic Straddle 4
Overview ERC-721
Total Supply:
141 rDPX-ATLANTIC-STRADDLE-4
Holders:
122 addresses
Transfers:
-
Contract:
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Similar Match Source Code
Note: This contract matches the deployed ByteCode of the Source Code for Contract 0x0Dc96f38980144ebFfe745706DFeE92622dba829
Contract Name:
AtlanticStraddle
Compiler Version
v0.8.17+commit.8df45f5f
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (access/AccessControl.sol)
pragma solidity ^0.8.0;
import "./IAccessControl.sol";
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping(address => bool) members;
bytes32 adminRole;
}
mapping(bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role);
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view virtual override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `_msgSender()` is missing `role`.
* Overriding this function changes the behavior of the {onlyRole} modifier.
*
* Format of the revert message is described in {_checkRole}.
*
* _Available since v4.6._
*/
function _checkRole(bytes32 role) internal view virtual {
_checkRole(role, _msgSender());
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/
*/
function _checkRole(bytes32 role, address account) internal view virtual {
if (!hasRole(role, account)) {
revert(
string(
abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(account),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)
)
);
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*
* May emit a {RoleGranted} event.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*
* May emit a {RoleRevoked} event.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been revoked `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*
* May emit a {RoleRevoked} event.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* May emit a {RoleGranted} event.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*
* NOTE: This function is deprecated in favor of {_grantRole}.
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
bytes32 previousAdminRole = getRoleAdmin(role);
_roles[role].adminRole = adminRole;
emit RoleAdminChanged(role, previousAdminRole, adminRole);
}
/**
* @dev Grants `role` to `account`.
*
* Internal function without access restriction.
*
* May emit a {RoleGranted} event.
*/
function _grantRole(bytes32 role, address account) internal virtual {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
/**
* @dev Revokes `role` from `account`.
*
* Internal function without access restriction.
*
* May emit a {RoleRevoked} event.
*/
function _revokeRole(bytes32 role, address account) internal virtual {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)
pragma solidity ^0.8.0;
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {AccessControl-_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) external view returns (bool);
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {AccessControl-_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) external view returns (bytes32);
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) external;
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) external;
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.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.
*/
abstract contract Pausable is Context {
/**
* @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.
*/
constructor() {
_paused = false;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
_requireNotPaused();
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
_requirePaused();
_;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Throws if the contract is paused.
*/
function _requireNotPaused() internal view virtual {
require(!paused(), "Pausable: paused");
}
/**
* @dev Throws if the contract is not paused.
*/
function _requirePaused() internal view virtual {
require(paused(), "Pausable: not paused");
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @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].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being 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 percentage 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.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @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 making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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);
/**
* @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 `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
uint256 amount
) external returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/ERC721.sol)
pragma solidity ^0.8.0;
import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";
/**
* @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
* the Metadata extension, but not including the Enumerable extension, which is available separately as
* {ERC721Enumerable}.
*/
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
using Address for address;
using Strings for uint256;
// Token name
string private _name;
// Token symbol
string private _symbol;
// Mapping from token ID to owner address
mapping(uint256 => address) private _owners;
// Mapping owner address to token count
mapping(address => uint256) private _balances;
// 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;
/**
* @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
return
interfaceId == type(IERC721).interfaceId ||
interfaceId == type(IERC721Metadata).interfaceId ||
super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721-balanceOf}.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
require(owner != address(0), "ERC721: address zero is not a valid owner");
return _balances[owner];
}
/**
* @dev See {IERC721-ownerOf}.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
address owner = _ownerOf(tokenId);
require(owner != address(0), "ERC721: invalid token ID");
return owner;
}
/**
* @dev See {IERC721Metadata-name}.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev See {IERC721Metadata-symbol}.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev See {IERC721Metadata-tokenURI}.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
_requireMinted(tokenId);
string memory baseURI = _baseURI();
return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, can be overridden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return "";
}
/**
* @dev See {IERC721-approve}.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ERC721.ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not token owner or approved for all"
);
_approve(to, tokenId);
}
/**
* @dev See {IERC721-getApproved}.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
_requireMinted(tokenId);
return _tokenApprovals[tokenId];
}
/**
* @dev See {IERC721-setApprovalForAll}.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
_setApprovalForAll(_msgSender(), operator, approved);
}
/**
* @dev See {IERC721-isApprovedForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return _operatorApprovals[owner][operator];
}
/**
* @dev See {IERC721-transferFrom}.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
//solhint-disable-next-line max-line-length
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");
_transfer(from, to, tokenId);
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, "");
}
/**
* @dev See {IERC721-safeTransferFrom}.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory data
) public virtual override {
require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: caller is not token owner or approved");
_safeTransfer(from, to, tokenId, data);
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* `data` is additional data, it has no specified format and it is sent in call to `to`.
*
* This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
* implement alternative mechanisms to perform token transfer, such as signature-based.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
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 the owner of the `tokenId`. Does NOT revert if token doesn't exist
*/
function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
return _owners[tokenId];
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted (`_mint`),
* and stop existing when they are burned (`_burn`).
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return _ownerOf(tokenId) != address(0);
}
/**
* @dev Returns whether `spender` is allowed to manage `tokenId`.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
address owner = ERC721.ownerOf(tokenId);
return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender);
}
/**
* @dev Safely mints `tokenId` and transfers it to `to`.
*
* Requirements:
*
* - `tokenId` must not exist.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function _safeMint(address to, uint256 tokenId) internal virtual {
_safeMint(to, tokenId, "");
}
/**
* @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
* forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
*/
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 Mints `tokenId` and transfers it to `to`.
*
* WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
*
* Requirements:
*
* - `tokenId` must not exist.
* - `to` cannot be the zero address.
*
* Emits a {Transfer} event.
*/
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, 1);
// Check that tokenId was not minted by `_beforeTokenTransfer` hook
require(!_exists(tokenId), "ERC721: token already minted");
unchecked {
// Will not overflow unless all 2**256 token ids are minted to the same owner.
// Given that tokens are minted one by one, it is impossible in practice that
// this ever happens. Might change if we allow batch minting.
// The ERC fails to describe this case.
_balances[to] += 1;
}
_owners[tokenId] = to;
emit Transfer(address(0), to, tokenId);
_afterTokenTransfer(address(0), to, tokenId, 1);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
* This is an internal function that does not check if the sender is authorized to operate on the token.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId) internal virtual {
address owner = ERC721.ownerOf(tokenId);
_beforeTokenTransfer(owner, address(0), tokenId, 1);
// Update ownership in case tokenId was transferred by `_beforeTokenTransfer` hook
owner = ERC721.ownerOf(tokenId);
// Clear approvals
delete _tokenApprovals[tokenId];
unchecked {
// Cannot overflow, as that would require more tokens to be burned/transferred
// out than the owner initially received through minting and transferring in.
_balances[owner] -= 1;
}
delete _owners[tokenId];
emit Transfer(owner, address(0), tokenId);
_afterTokenTransfer(owner, address(0), tokenId, 1);
}
/**
* @dev Transfers `tokenId` from `from` to `to`.
* As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
*
* Emits a {Transfer} event.
*/
function _transfer(
address from,
address to,
uint256 tokenId
) internal virtual {
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
require(to != address(0), "ERC721: transfer to the zero address");
_beforeTokenTransfer(from, to, tokenId, 1);
// Check that tokenId was not transferred by `_beforeTokenTransfer` hook
require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
// Clear approvals from the previous owner
delete _tokenApprovals[tokenId];
unchecked {
// `_balances[from]` cannot overflow for the same reason as described in `_burn`:
// `from`'s balance is the number of token held, which is at least one before the current
// transfer.
// `_balances[to]` could overflow in the conditions described in `_mint`. That would require
// all 2**256 token ids to be minted, which in practice is impossible.
_balances[from] -= 1;
_balances[to] += 1;
}
_owners[tokenId] = to;
emit Transfer(from, to, tokenId);
_afterTokenTransfer(from, to, tokenId, 1);
}
/**
* @dev Approve `to` to operate on `tokenId`
*
* Emits an {Approval} event.
*/
function _approve(address to, uint256 tokenId) internal virtual {
_tokenApprovals[tokenId] = to;
emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
}
/**
* @dev Approve `operator` to operate on all of `owner` tokens
*
* Emits an {ApprovalForAll} event.
*/
function _setApprovalForAll(
address owner,
address operator,
bool approved
) internal virtual {
require(owner != operator, "ERC721: approve to caller");
_operatorApprovals[owner][operator] = approved;
emit ApprovalForAll(owner, operator, approved);
}
/**
* @dev Reverts if the `tokenId` has not been minted yet.
*/
function _requireMinted(uint256 tokenId) internal view virtual {
require(_exists(tokenId), "ERC721: invalid token ID");
}
/**
* @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()) {
try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
return retval == IERC721Receiver.onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert("ERC721: transfer to non ERC721Receiver implementer");
} else {
/// @solidity memory-safe-assembly
assembly {
revert(add(32, reason), mload(reason))
}
}
}
} else {
return true;
}
}
/**
* @dev Hook that is called before any token transfer. This includes minting and burning. If {ERC721Consecutive} is
* used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s tokens will be transferred to `to`.
* - When `from` is zero, the tokens will be minted for `to`.
* - When `to` is zero, ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
* - `batchSize` is non-zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256, /* firstTokenId */
uint256 batchSize
) internal virtual {
if (batchSize > 1) {
if (from != address(0)) {
_balances[from] -= batchSize;
}
if (to != address(0)) {
_balances[to] += batchSize;
}
}
}
/**
* @dev Hook that is called after any token transfer. This includes minting and burning. If {ERC721Consecutive} is
* used, the hook may be called as part of a consecutive (batch) mint, as indicated by `batchSize` greater than 1.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, ``from``'s tokens were transferred to `to`.
* - When `from` is zero, the tokens were minted for `to`.
* - When `to` is zero, ``from``'s tokens were burned.
* - `from` and `to` are never both zero.
* - `batchSize` is non-zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize
) internal virtual {}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
import "../../utils/introspection/IERC165.sol";
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
* or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
* understand this adds an external call which potentially creates a reentrancy vulnerability.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)
pragma solidity ^0.8.0;
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
interface IERC721Receiver {
/**
* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
* by `operator` from `from`, this function is called.
*
* It must return its Solidity selector to confirm the token transfer.
* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
*
* The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
*/
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/extensions/ERC721Enumerable.sol)
pragma solidity ^0.8.0;
import "../ERC721.sol";
import "./IERC721Enumerable.sol";
/**
* @dev This implements an optional extension of {ERC721} defined in the EIP that adds
* enumerability of all the token ids in the contract as well as all token ids owned by each
* account.
*/
abstract contract ERC721Enumerable is ERC721, IERC721Enumerable {
// Mapping from owner to list of owned token IDs
mapping(address => mapping(uint256 => uint256)) private _ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private _ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] private _allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) private _allTokensIndex;
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override(IERC165, ERC721) returns (bool) {
return interfaceId == type(IERC721Enumerable).interfaceId || super.supportsInterface(interfaceId);
}
/**
* @dev See {IERC721Enumerable-tokenOfOwnerByIndex}.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) public view virtual override returns (uint256) {
require(index < ERC721.balanceOf(owner), "ERC721Enumerable: owner index out of bounds");
return _ownedTokens[owner][index];
}
/**
* @dev See {IERC721Enumerable-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _allTokens.length;
}
/**
* @dev See {IERC721Enumerable-tokenByIndex}.
*/
function tokenByIndex(uint256 index) public view virtual override returns (uint256) {
require(index < ERC721Enumerable.totalSupply(), "ERC721Enumerable: global index out of bounds");
return _allTokens[index];
}
/**
* @dev See {ERC721-_beforeTokenTransfer}.
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 firstTokenId,
uint256 batchSize
) internal virtual override {
super._beforeTokenTransfer(from, to, firstTokenId, batchSize);
if (batchSize > 1) {
// Will only trigger during construction. Batch transferring (minting) is not available afterwards.
revert("ERC721Enumerable: consecutive transfers not supported");
}
uint256 tokenId = firstTokenId;
if (from == address(0)) {
_addTokenToAllTokensEnumeration(tokenId);
} else if (from != to) {
_removeTokenFromOwnerEnumeration(from, tokenId);
}
if (to == address(0)) {
_removeTokenFromAllTokensEnumeration(tokenId);
} else if (to != from) {
_addTokenToOwnerEnumeration(to, tokenId);
}
}
/**
* @dev Private function to add a token to this extension's ownership-tracking data structures.
* @param to address representing the new owner of the given token ID
* @param tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
uint256 length = ERC721.balanceOf(to);
_ownedTokens[to][length] = tokenId;
_ownedTokensIndex[tokenId] = length;
}
/**
* @dev Private function to add a token to this extension's token tracking data structures.
* @param tokenId uint256 ID of the token to be added to the tokens list
*/
function _addTokenToAllTokensEnumeration(uint256 tokenId) private {
_allTokensIndex[tokenId] = _allTokens.length;
_allTokens.push(tokenId);
}
/**
* @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that
* while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for
* gas optimizations e.g. when performing a transfer operation (avoiding double writes).
* This has O(1) time complexity, but alters the order of the _ownedTokens array.
* @param from address representing the previous owner of the given token ID
* @param tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private {
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = ERC721.balanceOf(from) - 1;
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
delete _ownedTokensIndex[tokenId];
delete _ownedTokens[from][lastTokenIndex];
}
/**
* @dev Private function to remove a token from this extension's token tracking data structures.
* This has O(1) time complexity, but alters the order of the _allTokens array.
* @param tokenId uint256 ID of the token to be removed from the tokens list
*/
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length - 1;
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
delete _allTokensIndex[tokenId];
_allTokens.pop();
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/extensions/IERC721Enumerable.sol)
pragma solidity ^0.8.0;
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 {
/**
* @dev Returns the total amount of tokens stored by the contract.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns a token ID owned by `owner` at a given `index` of its token list.
* Use along with {balanceOf} to enumerate all of ``owner``'s tokens.
*/
function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256);
/**
* @dev Returns a token ID at a given `index` of all the tokens stored by the contract.
* Use along with {totalSupply} to enumerate all tokens.
*/
function tokenByIndex(uint256 index) external view returns (uint256);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
pragma solidity ^0.8.0;
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 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Counters.sol)
pragma solidity ^0.8.0;
/**
* @title Counters
* @author Matt Condon (@shrugs)
* @dev Provides counters that can only be incremented, decremented or reset. 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;`
*/
library Counters {
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 {
unchecked {
counter._value += 1;
}
}
function decrement(Counter storage counter) internal {
uint256 value = counter._value;
require(value > 0, "Counter: decrement overflow");
unchecked {
counter._value = value - 1;
}
}
function reset(Counter storage counter) internal {
counter._value = 0;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol)
pragma solidity ^0.8.0;
import "./math/Math.sol";
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant _SYMBOLS = "0123456789abcdef";
uint8 private constant _ADDRESS_LENGTH = 20;
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
unchecked {
uint256 length = Math.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), _SYMBOLS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, Math.log256(value) + 1);
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = _SYMBOLS[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)
pragma solidity ^0.8.0;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)
* with further edits by Uniswap Labs also under MIT license.
*/
function mulDiv(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1);
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.
// See https://cs.stackexchange.com/q/138556/92363.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works
// in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(
uint256 x,
uint256 y,
uint256 denominator,
Rounding rounding
) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10**64) {
value /= 10**64;
result += 64;
}
if (value >= 10**32) {
value /= 10**32;
result += 32;
}
if (value >= 10**16) {
value /= 10**16;
result += 16;
}
if (value >= 10**8) {
value /= 10**8;
result += 8;
}
if (value >= 10**4) {
value /= 10**4;
result += 4;
}
if (value >= 10**2) {
value /= 10**2;
result += 2;
}
if (value >= 10**1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0);
}
}
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.7;
// Libraries
import {Counters} from "@openzeppelin/contracts/utils/Counters.sol";
import {ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import {ERC721Enumerable} from "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
import {Math} from "@openzeppelin/contracts/utils/math/Math.sol";
import {SafeERC20} from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
// Contracts
import {AccessControl} from "@openzeppelin/contracts/access/AccessControl.sol";
import {ReentrancyGuard} from "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import {Pausable} from "@openzeppelin/contracts/security/Pausable.sol";
import {ContractWhitelist} from "./helpers/ContractWhitelist.sol";
import {IAssetSwapper} from "./asset-swapper/IAssetSwapper.sol";
// Interfaces
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import {IOptionPricing} from "./interface/IOptionPricing.sol";
import {IPriceOracle} from "./interface/IPriceOracle.sol";
import {IVolatilityOracle} from "./interface/IVolatilityOracle.sol";
/// @title Atlantic Straddles
/// @author Dopex
/// @notice - Accept stable deposits
/// - Deposits during an epoch will be for the next epoch
/// - Stables are used as collateral to sell ATM put options for the underlying
/// - n day epochs, deposits auto-rollover unless deactivated
/// - Withdrawal considers performance of pool since deposit
/// - On purchase of an Atlantic straddle, use 50% of the collateral locked in the PUT to purchase underlying asset
/// - At expiry, settle by selling purchased underlying asset to return AP collateral
contract AtlanticStraddle is
ReentrancyGuard,
ERC721,
ERC721Enumerable,
AccessControl,
Pausable,
ContractWhitelist
{
using SafeERC20 for IERC20;
using Counters for Counters.Counter;
/// @dev Token ID counter for write positions
Counters.Counter private _tokenIdCounter;
/// @dev Current epoch. 0-indexed
uint256 public currentEpoch;
/// @dev Managar Role
bytes32 public constant MANAGER_ROLE = keccak256("MANAGER_ROLE");
/// @dev Contract addresses
Addresses public addresses;
/// @dev Total deposits for epoch (epoch => EpochData)
mapping(uint256 => EpochData) public epochData;
/// @dev Data for premium and funding collections for an epoch (epoch => EpochCollectionsData)
mapping(uint256 => EpochCollectionsData) public epochCollectionsData;
/// @dev Is vault ready for the epoch i.e can purchases begin (epoch => isVaultReady)
mapping(uint256 => bool) public isVaultReady;
/// @dev Toggled to true after an epoch has been marked pre-expired (epoch => isEpochPreExpired)
mapping(uint256 => bool) public isEpochPreExpired;
/// @dev Toggled to true after an epoch has been marked expired (epoch => isEpochExpired)
mapping(uint256 => bool) public isEpochExpired;
/// @dev Write positions (tokenId => WritePosition)
mapping(uint256 => WritePosition) public writePositions;
/// @dev Straddle positions (tokenId => StraddlePosition)
mapping(uint256 => StraddlePosition) public straddlePositions;
/// @dev Percentage precision
uint256 public constant PERCENT_PRECISION = 1e6;
/// @dev USDC decimals
uint256 public constant USDC_DECIMALS = 1e6;
/// @dev Min purchase 0.01 to prevent spam
uint256 public constant MIN_PURCHASE_AMOUNT = 1e16;
/// @dev Min deposit amount 1 usd to prevent spam
uint256 public constant MIN_DEPOSIT_AMOUNT = USDC_DECIMALS;
/// @dev Seconds a year
uint256 internal constant SECONDS_A_YEAR = 365 days;
/// @dev Purchase fee percent
uint256 public purchaseFeePercent = 15e4;
/// @dev Delegation fee
uint256 public maxDelegationFee = USDC_DECIMALS;
/// @dev Settlement fee percent
uint256 public settlementFeePercent = 1e5;
/// @dev AP funding percent
uint256 public apFundingPercent = 36 * PERCENT_PRECISION;
/// @dev Fee percent charged to owner, default to 0.1%
uint256 public delegationFeePercent = PERCENT_PRECISION / 10;
/// @dev Purchase time limit variable to prevent last min buyouts
uint256 public blackoutPeriodBeforeExpiry = 4 hours;
/// @dev PnL slippage percent
uint256 public pnlSlippagePercent = 5e5;
/// @dev The decimal precision for amount of options * strike price (or price)
uint256 internal constant AMOUNT_PRICE_TO_USDC_DECIMALS =
(1e18 * 1e8) / 1e6;
struct Addresses {
// USDC token (1e6 precision)
address usd;
// Underlying token
address underlying;
// Asset Swapper
address assetSwapper;
// Price Oracle
address priceOracle;
// Volatility Oracle
address volatilityOracle;
// Option Pricing
address optionPricing;
// Fee Distributor
address feeDistributor;
}
struct EpochData {
// Start time
uint256 startTime;
// Expiry time
uint256 expiry;
// Total USD deposits
uint256 usdDeposits;
// Active USD deposits (used for writing)
uint256 activeUsdDeposits;
// Settlement Price
uint256 settlementPrice;
// Percentage of total settlement executed
uint256 settlementPercentage;
// Amount of underlying assets purchased
uint256 underlyingPurchased;
}
struct EpochCollectionsData {
// Total premiums collected for USD deposits
uint256 usdPremiums;
// Total funding collected for USD deposits
uint256 usdFunding;
// Total amount of straddles sold
uint256 totalSold;
// Number of "live" straddles per epoch
uint256 straddleCounter;
// Final usd balance before withdraw
uint256 finalUsdBalanceBeforeWithdaw;
}
struct WritePosition {
// Epoch #
uint256 epoch;
// USD deposits
uint256 usdDeposit;
// Whether deposit should be rolled over to the next epoch
bool rollover;
}
struct StraddlePosition {
// Epoch #
uint256 epoch;
// Amount
uint256 amount;
// AP Strike
uint256 apStrike;
// Underlying purchased for this straddle
uint256 underlyingPurchased;
}
event Bootstrap(uint256 epoch);
event Deposit(
uint256 epoch,
uint256 amount,
bool rollover,
address user,
address sender,
uint256 tokenId
);
event Purchase(
uint256 epoch,
address user,
uint256 straddleId,
uint256 cost
);
event Settle(
uint256 epoch,
address indexed sender,
address indexed owner,
uint256 id,
uint256 pnl
);
event Withdraw(
uint256 epoch,
address indexed sender,
uint256 id,
uint256 pnl
);
event ToggleRollover(uint256 id, bool rollover);
event EpochExpired(address caller);
event EpochPreExpired(address caller);
event SetAddresses(Addresses addresses);
event SetBlackoutPeriod(uint256 period);
event SetApFunding(uint256 apFunding);
event SetPnlSlippagePercent(uint256 pnlSlippagePercent);
event SetFees(
uint256 purchaseFeePercent,
uint256 settlementFeePercent,
uint256 delegationFeePercent,
uint256 maxDelegationFee
);
event SetAssetSwapperAllowance(address token, uint256 value, bool increase);
/*==== CONSTRUCTOR ====*/
constructor(
string memory _name,
string memory _symbol,
Addresses memory _addresses
) ERC721(_name, _symbol) {
addresses = _addresses;
_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
_setupRole(MANAGER_ROLE, msg.sender);
}
/*==== USER METHODS ====*/
/// @dev Deposit for next epoch
/// @param amount Amount to deposit
/// @param shouldRollover Should the deposit be rolled over
/// @param user User address
/// @return tokenId Write position token ID
function deposit(
uint256 amount,
bool shouldRollover,
address user
) external whenNotPaused nonReentrant returns (uint256 tokenId) {
_isEligibleSender();
require(amount > MIN_DEPOSIT_AMOUNT, "Invalid amount");
uint256 nextEpoch = currentEpoch + 1;
epochData[nextEpoch].usdDeposits += amount;
epochCollectionsData[nextEpoch].finalUsdBalanceBeforeWithdaw += amount;
tokenId = _mintPositionToken(user);
writePositions[tokenId] = WritePosition({
epoch: nextEpoch,
usdDeposit: amount,
rollover: shouldRollover
});
IERC20(addresses.usd).safeTransferFrom(
msg.sender,
address(this),
amount
);
emit Deposit(
nextEpoch,
amount,
shouldRollover,
user,
msg.sender,
tokenId
);
}
/// @dev Rolls over a deposit to the next epoch. Anyone can call this for write positions with `rollover` enabled
/// Call this prior to bootstrapping to a new epoch or it will roll over to epoch n + 2
/// @param id Write position token ID
/// @return tokenId Rolled over write position token ID
function rollover(uint256 id)
public
whenNotPaused
nonReentrant
returns (uint256 tokenId)
{
_isEligibleSender();
WritePosition memory writePos = writePositions[id];
require(writePos.rollover, "Rollover not authorized");
require(writePos.epoch != 0, "Invalid write position");
require(isEpochExpired[writePos.epoch], "Epoch has not expired");
uint256 depositPlusPnl = calculateWritePositionPnl(id);
address user = ownerOf(id);
_burn(id);
require(depositPlusPnl != 0, "Write position pnl is 0");
uint256 delegationFee;
// If the owner of the position is not the sender, collect rollover delegation fees
if (user != msg.sender) {
delegationFee =
(depositPlusPnl * delegationFeePercent) /
(PERCENT_PRECISION * 100);
delegationFee = Math.min(delegationFee, maxDelegationFee);
}
depositPlusPnl -= delegationFee;
emit Withdraw(writePos.epoch, user, id, depositPlusPnl);
uint256 nextEpoch = currentEpoch + 1;
epochData[nextEpoch].usdDeposits += depositPlusPnl;
epochCollectionsData[nextEpoch]
.finalUsdBalanceBeforeWithdaw += depositPlusPnl;
tokenId = _mintPositionToken(user);
writePositions[tokenId] = WritePosition({
epoch: nextEpoch,
usdDeposit: depositPlusPnl,
rollover: true
});
IERC20(addresses.usd).safeTransfer(msg.sender, delegationFee);
emit Deposit(nextEpoch, depositPlusPnl, true, user, user, tokenId);
}
/// @dev Rollover for multiple ids
/// @param ids Write position token IDs
/// @return tokenIds Rolled over write position token IDs
function multirollover(uint256[] memory ids)
external
returns (uint256[] memory tokenIds)
{
uint256 idsLength = ids.length;
tokenIds = new uint256[](idsLength);
for (uint256 i; i < idsLength; ) {
tokenIds[i] = rollover(ids[i]);
unchecked {
++i;
}
}
}
/// @dev Toggle rollover for a write position
/// @param id Write position token ID
function toggleRollover(uint256 id) external whenNotPaused nonReentrant {
_isEligibleSender();
require(ownerOf(id) == msg.sender, "Invalid owner");
require(writePositions[id].epoch != 0, "Invalid position");
writePositions[id].rollover = !writePositions[id].rollover;
emit ToggleRollover(id, writePositions[id].rollover);
}
/// @dev Withdraw write positions after strikes are settled
/// @param id ID of write position
/// @return writePositionPnl of write position
function withdraw(uint256 id)
external
whenNotPaused
nonReentrant
returns (uint256 writePositionPnl)
{
_isEligibleSender();
require(ownerOf(id) == msg.sender, "Invalid owner");
WritePosition memory writePos = writePositions[id];
require(writePos.epoch != 0, "Invalid write position");
require(isEpochExpired[writePos.epoch], "Settlements not done");
writePositionPnl = calculateWritePositionPnl(id);
_burn(id);
require(writePositionPnl != 0, "Write position pnl is 0");
IERC20(addresses.usd).safeTransfer(msg.sender, writePositionPnl);
emit Withdraw(writePos.epoch, msg.sender, id, writePositionPnl);
}
/// @dev Purchase a straddle
/// @param amount Approx. amount of straddles to purchase (10 ** 18)
/// @param swapperId Swapper ID of the swap method to use
/// @param minAmountOut Min amount out for the underlying purchased
/// @param user Address to purchase straddles for
/// @return tokenId Straddle position token ID
function purchase(
uint256 amount,
uint256 minAmountOut,
uint256 swapperId,
address user
)
external
whenNotPaused
nonReentrant
returns (
uint256 tokenId,
uint256 protocolFee,
uint256 straddleCost
)
{
_isEligibleSender();
require(currentEpoch > 0, "Invalid epoch");
require(amount > MIN_PURCHASE_AMOUNT, "Invalid amount");
require(
block.timestamp <
epochData[currentEpoch].expiry - blackoutPeriodBeforeExpiry,
"Cannot purchase during blackout period"
);
uint256 currentPrice = getUnderlyingPrice();
uint256 timeToExpiry = epochData[currentEpoch].expiry - block.timestamp;
require(
epochData[currentEpoch].usdDeposits -
(epochData[currentEpoch].activeUsdDeposits /
AMOUNT_PRICE_TO_USDC_DECIMALS) >=
(currentPrice * amount) / AMOUNT_PRICE_TO_USDC_DECIMALS,
"Not enough AP liquidity available"
);
// Swap half of AP to underlying
uint256 underlyingPurchased = _swapToUnderlying(
((currentPrice * amount) / 2) / AMOUNT_PRICE_TO_USDC_DECIMALS,
minAmountOut,
swapperId
);
epochCollectionsData[currentEpoch].finalUsdBalanceBeforeWithdaw -=
((currentPrice * amount) / 2) /
AMOUNT_PRICE_TO_USDC_DECIMALS;
uint256 swapPrice = (currentPrice * amount) / (underlyingPurchased * 2);
epochData[currentEpoch].underlyingPurchased += underlyingPurchased;
// Deposits
epochData[currentEpoch].activeUsdDeposits +=
swapPrice *
(underlyingPurchased * 2);
uint256 apPremium = calculatePremium(
true,
swapPrice,
swapPrice,
underlyingPurchased * 2,
epochData[currentEpoch].expiry
);
uint256 apFunding = calculateApFunding(
swapPrice,
underlyingPurchased * 2,
timeToExpiry
);
// Collections
epochCollectionsData[currentEpoch].usdPremiums += apPremium;
epochCollectionsData[currentEpoch].usdFunding += apFunding;
epochCollectionsData[currentEpoch].totalSold += underlyingPurchased * 2;
epochCollectionsData[currentEpoch].straddleCounter += 1;
// Mint straddle position token
tokenId = _mintPositionToken(user);
straddlePositions[tokenId] = StraddlePosition({
epoch: currentEpoch,
amount: underlyingPurchased * 2,
apStrike: swapPrice,
underlyingPurchased: underlyingPurchased
});
protocolFee =
(amount * currentPrice * purchaseFeePercent) /
(PERCENT_PRECISION * AMOUNT_PRICE_TO_USDC_DECIMALS * 100);
straddleCost = ((apPremium + apFunding) /
AMOUNT_PRICE_TO_USDC_DECIMALS);
IERC20(addresses.usd).safeTransferFrom(
msg.sender,
address(this),
straddleCost + protocolFee
);
IERC20(addresses.usd).safeTransfer(
addresses.feeDistributor,
protocolFee
);
epochCollectionsData[currentEpoch]
.finalUsdBalanceBeforeWithdaw += ((apPremium + apFunding) /
AMOUNT_PRICE_TO_USDC_DECIMALS);
emit Purchase(currentEpoch, user, tokenId, apPremium + apFunding);
}
/// @dev Settles a purchased option
/// @param id ID of straddle position
function settle(uint256 id)
public
whenNotPaused
nonReentrant
returns (uint256)
{
_isEligibleSender();
StraddlePosition memory sp = straddlePositions[id];
require(sp.epoch != 0, "Invalid straddle position");
require(isEpochPreExpired[sp.epoch], "Epoch has not pre-expired");
uint256 buyerPnl = calculateStraddlePositionPnl(id);
address owner = ownerOf(id);
_burn(id);
require(buyerPnl != 0, "buyerPnl cannot be 0");
uint256 protocolFee = (buyerPnl * settlementFeePercent) /
(PERCENT_PRECISION * 100);
uint256 delegationFee;
// If owner did not settle, collect settlement fees
if (owner != msg.sender) {
delegationFee =
(buyerPnl * delegationFeePercent) /
(PERCENT_PRECISION * 100);
delegationFee = Math.min(delegationFee, maxDelegationFee);
}
buyerPnl -= (protocolFee + delegationFee);
epochCollectionsData[sp.epoch].straddleCounter -= 1;
epochCollectionsData[sp.epoch]
.finalUsdBalanceBeforeWithdaw -= (buyerPnl +
protocolFee +
delegationFee);
IERC20(addresses.usd).safeTransfer(
addresses.feeDistributor,
protocolFee
);
IERC20(addresses.usd).safeTransfer(owner, buyerPnl);
IERC20(addresses.usd).safeTransfer(msg.sender, delegationFee);
emit Settle(sp.epoch, msg.sender, owner, id, buyerPnl);
return buyerPnl;
}
/// @dev Settle for multiple ids
/// @param ids Straddle position token IDs
/// @return pnls pnls
function multisettle(uint256[] memory ids)
external
returns (uint256[] memory pnls)
{
uint256 idsLength = ids.length;
pnls = new uint256[](idsLength);
for (uint256 i; i < idsLength; ) {
pnls[i] = settle(ids[i]);
unchecked {
++i;
}
}
}
/*==== INTERNAL METHODS ====*/
/// @dev Internal function to mint a write position token
/// @param to the address to mint the position to
function _mintPositionToken(address to) private returns (uint256 tokenId) {
tokenId = _tokenIdCounter.current();
_tokenIdCounter.increment();
_safeMint(to, tokenId);
}
/// @dev Internal function to swap USD to underlying tokens
/// @param amount Amount of USD to swap
/// @param minAmountOut The min amount out
/// @param swapperId Swapper ID
function _swapToUnderlying(
uint256 amount,
uint256 minAmountOut,
uint256 swapperId
) internal returns (uint256 underlyingPurchased) {
underlyingPurchased = IAssetSwapper(addresses.assetSwapper).swapAsset(
addresses.usd,
addresses.underlying,
amount,
minAmountOut,
swapperId
);
}
/// @dev Internal function to swap underlying tokens to USD
/// @param amount Amount of underlying tokens to swap
/// @param minAmountOut The min amount out
/// @param swapperId Swapper ID
function _swapFromUnderlying(
uint256 amount,
uint256 minAmountOut,
uint256 swapperId
) internal returns (uint256 usdObtained) {
usdObtained = IAssetSwapper(addresses.assetSwapper).swapAsset(
addresses.underlying,
addresses.usd,
amount,
minAmountOut,
swapperId
);
}
/*==== VIEWS ====*/
/// @notice Returns the price of the underlying in USD in 1e8 precision
function getUnderlyingPrice() public view returns (uint256) {
return IPriceOracle(addresses.priceOracle).getUnderlyingPrice();
}
/// @notice Returns the volatility from the volatility oracle
/// @param _strike Strike of the option
function getVolatility(uint256 _strike) public view returns (uint256) {
return
IVolatilityOracle(addresses.volatilityOracle).getVolatility(
_strike
);
}
/// @notice Calculate premium for an option
/// @param _isPut Is put option
/// @param _price Price of the underlying
/// @param _strike Strike price of the option
/// @param _amount Amount of options (1e18 precision)
/// @param _expiry Expiry of the option
/// @return premium in USD
function calculatePremium(
bool _isPut,
uint256 _price,
uint256 _strike,
uint256 _amount,
uint256 _expiry
) public view returns (uint256 premium) {
premium = (IOptionPricing(addresses.optionPricing).getOptionPrice(
_isPut,
_expiry,
_strike,
_price,
getVolatility(_strike)
) * _amount);
}
/// @notice Calculate premium for an option
/// @param _price Price of the asset
/// @param _amount Amount of options (1e18 precision)
/// @param _timeToExpiry Time to expiry
function calculateApFunding(
uint256 _price,
uint256 _amount,
uint256 _timeToExpiry
) public view returns (uint256 funding) {
funding =
(((_price * apFundingPercent * _timeToExpiry * _amount) /
(SECONDS_A_YEAR * PERCENT_PRECISION)) / 100) /
2;
}
/// @notice Calculates the writer position pnl
/// @param id the id of the write position
/// @return writePositionPnl
function calculateWritePositionPnl(uint256 id)
public
view
returns (uint256 writePositionPnl)
{
WritePosition memory writePos = writePositions[id];
require(writePos.epoch != 0, "Invalid write position");
writePositionPnl =
(writePos.usdDeposit *
epochCollectionsData[writePos.epoch]
.finalUsdBalanceBeforeWithdaw) /
epochData[writePos.epoch].usdDeposits;
}
/// @param id ID of straddle position
/// @return buyerPnl positive pnl of buyer
function calculateStraddlePositionPnl(uint256 id)
public
view
returns (uint256 buyerPnl)
{
StraddlePosition memory sp = straddlePositions[id];
require(sp.epoch != 0, "Invalid straddle position");
uint256 settlementPrice = epochData[sp.epoch].settlementPrice;
uint256 strikePrice = sp.apStrike;
// straddle pnl = max(K - S, 0) + 0.5 * (S - K)
// if K > S, get (K - S) - 0.5 * (K - S)
if (strikePrice > settlementPrice) {
buyerPnl = (strikePrice - settlementPrice) * sp.amount;
buyerPnl -=
(strikePrice - settlementPrice) *
sp.underlyingPurchased;
} else {
// else get 0 + 0.5 * (S - K)
buyerPnl +=
(settlementPrice - strikePrice) *
sp.underlyingPurchased;
}
buyerPnl /= AMOUNT_PRICE_TO_USDC_DECIMALS;
buyerPnl -= (buyerPnl * pnlSlippagePercent) / (100 * PERCENT_PRECISION);
}
/// @notice Returns the tokenIds owned by a wallet (writePositions)
/// @param owner wallet owner
function writePositionsOfOwner(address owner)
public
view
returns (uint256[] memory tokenIds)
{
uint256 ownerTokenCount = balanceOf(owner);
uint256 count;
for (uint256 i; i < ownerTokenCount; ) {
uint256 tokenId = tokenOfOwnerByIndex(owner, i);
if (writePositions[tokenId].epoch != 0) {
++count;
}
unchecked {
++i;
}
}
tokenIds = new uint256[](count);
uint256 start;
uint256 idx;
while (start < count) {
uint256 tokenId = tokenOfOwnerByIndex(owner, idx);
if (writePositions[tokenId].epoch != 0) {
tokenIds[start] = tokenId;
++start;
}
++idx;
}
}
/// @notice Returns the tokenIds owned by a wallet (straddlePositions)
/// @param owner wallet owner
function straddlePositionsOfOwner(address owner)
public
view
returns (uint256[] memory tokenIds)
{
uint256 ownerTokenCount = balanceOf(owner);
uint256 count;
for (uint256 i; i < ownerTokenCount; ) {
uint256 tokenId = tokenOfOwnerByIndex(owner, i);
if (straddlePositions[tokenId].epoch != 0) {
++count;
}
unchecked {
++i;
}
}
tokenIds = new uint256[](count);
uint256 start;
uint256 idx;
while (start < count) {
uint256 tokenId = tokenOfOwnerByIndex(owner, idx);
if (straddlePositions[tokenId].epoch != 0) {
tokenIds[start] = tokenId;
++start;
}
++idx;
}
}
/*==== MANAGER METHODS ====*/
/// @dev Bootstrap and start the next epoch for purchases
/// @param expiry Expiry
function bootstrap(uint256 expiry)
external
whenNotPaused
onlyRole(MANAGER_ROLE)
returns (bool)
{
uint256 nextEpoch = currentEpoch + 1;
require(
block.timestamp < expiry,
"Expiry cannot be before current time"
);
require(
currentEpoch == 0 || !isVaultReady[nextEpoch],
"Cannot bootstrap when vault is ready"
);
if (currentEpoch > 0) {
require(
isEpochExpired[currentEpoch],
"Cannot bootstrap before the current epoch was expired & settled"
);
}
// Set expiry in epoch data
epochData[nextEpoch].startTime = block.timestamp;
epochData[nextEpoch].expiry = expiry;
// Mark vault as ready for epoch
isVaultReady[nextEpoch] = true;
// Increase the current epoch
currentEpoch = nextEpoch;
emit Bootstrap(nextEpoch);
return true;
}
/// @dev Swap a certain percentage of total purchased underlying
/// @param percentage percentage of underlying to swap in 1e6
/// @param minAmountOut the min amount out
/// @param swapperId Swapper ID of the swap method to use with AssetSwapper
function preExpireEpoch(
uint256 percentage,
uint256 minAmountOut,
uint256 swapperId
) external whenNotPaused onlyRole(MANAGER_ROLE) returns (bool) {
EpochData memory data = epochData[currentEpoch];
require(percentage > 0, "Percentage cannot be 0");
require(
block.timestamp >= data.expiry,
"Time is not past epoch expiry"
);
require(
!isEpochPreExpired[currentEpoch],
"Epoch was already pre-expired"
);
require(!isEpochExpired[currentEpoch], "Epoch was already expired");
require(
data.settlementPercentage + percentage <= (100 * PERCENT_PRECISION),
"You cannot swap more than 100%"
);
// Swap all purchased underlying at current price
uint256 underlyingToSwap = (data.underlyingPurchased * percentage) /
(100 * PERCENT_PRECISION);
uint256 normalizedSettlementPrice;
if (underlyingToSwap > 0) {
uint256 usdObtained = _swapFromUnderlying(
underlyingToSwap,
minAmountOut,
swapperId
);
epochCollectionsData[currentEpoch]
.finalUsdBalanceBeforeWithdaw += usdObtained;
uint256 settlementPrice = (usdObtained *
AMOUNT_PRICE_TO_USDC_DECIMALS) / underlyingToSwap;
normalizedSettlementPrice =
((data.settlementPrice * data.settlementPercentage) +
(settlementPrice * percentage)) /
(data.settlementPercentage + percentage);
epochData[currentEpoch].settlementPercentage += percentage;
} else {
normalizedSettlementPrice = getUnderlyingPrice();
epochData[currentEpoch].settlementPercentage =
100 *
PERCENT_PRECISION;
}
if (epochData[currentEpoch].settlementPrice == 0) {
epochData[currentEpoch].settlementPrice = normalizedSettlementPrice;
} else {
epochData[currentEpoch].settlementPrice = Math.min(
epochData[currentEpoch].settlementPrice,
normalizedSettlementPrice
);
}
if (
epochData[currentEpoch].settlementPercentage >
(99 * PERCENT_PRECISION)
) {
isEpochPreExpired[currentEpoch] = true;
}
emit EpochPreExpired(msg.sender);
return true;
}
/// @dev Expire epoch and set the settlement price
function expireEpoch()
external
whenNotPaused
onlyRole(MANAGER_ROLE)
returns (bool expired)
{
require(
block.timestamp >= epochData[currentEpoch].expiry,
"Time is not past epoch expiry"
);
require(isEpochPreExpired[currentEpoch], "Epoch has not pre-expired");
require(!isEpochExpired[currentEpoch], "Epoch was already expired");
if (epochCollectionsData[currentEpoch].straddleCounter == 0) {
isEpochExpired[currentEpoch] = true;
expired = true;
} else {
revert("All settlements have not been processed");
}
emit EpochExpired(msg.sender);
}
/*==== ADMIN METHODS ====*/
/// @notice Sets the addresses used in the contract
/// @dev Can only be called by admin
/// @param _addresses Addresses
function setAddresses(Addresses memory _addresses)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
addresses = _addresses;
emit SetAddresses(_addresses);
}
/// @notice Change blackout period before expiry
/// @dev Can only be called by governance
function setBlackoutPeriodBeforeExpiry(uint256 period)
external
onlyRole(DEFAULT_ADMIN_ROLE)
returns (bool)
{
require(period > 1 hours, "Blackout period must be more than 1 hour");
blackoutPeriodBeforeExpiry = period;
emit SetBlackoutPeriod(period);
return true;
}
/// @notice Sets the apFunding
/// @dev Can only be called by admin
/// @param _apFundingPercent funding percentage number between 1% and 100%
function setApFunding(uint256 _apFundingPercent)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
require(_apFundingPercent > 0, "Funding rate must be greater than 0");
apFundingPercent = _apFundingPercent;
emit SetApFunding(_apFundingPercent);
}
/// @notice Sets the pnlSlippagePercent
/// @dev Can only be called by admin
/// @param _pnlSlippagePercent The pnl slippage percent
function setPnlSlippagePercent(uint256 _pnlSlippagePercent)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
require(_pnlSlippagePercent > 0, "Funding rate must be greater than 0");
pnlSlippagePercent = _pnlSlippagePercent;
emit SetPnlSlippagePercent(_pnlSlippagePercent);
}
/// @notice Sets the purchase/settlement fee percent
/// @dev Can only be called by admin
/// @param _purchaseFeePercent Purchase fee percent
/// @param _settlementFeePercent Settlement fee percent
/// @param _delegationFeePercent Delegation fee percent
/// @param _maxDelegationFee Max delegation fee for settlements and rollovers
function setFees(
uint256 _purchaseFeePercent,
uint256 _settlementFeePercent,
uint256 _delegationFeePercent,
uint256 _maxDelegationFee
) external onlyRole(DEFAULT_ADMIN_ROLE) {
require(
_purchaseFeePercent > 0 &&
_settlementFeePercent > 0 &&
_delegationFeePercent > 0 &&
_maxDelegationFee > 0,
"Values must be greater than 0"
);
purchaseFeePercent = _purchaseFeePercent;
settlementFeePercent = _settlementFeePercent;
delegationFeePercent = _delegationFeePercent;
maxDelegationFee = _maxDelegationFee;
emit SetFees(
_purchaseFeePercent,
_settlementFeePercent,
_delegationFeePercent,
_maxDelegationFee
);
}
/// @notice Sets the allowance of the asset swapper
/// @dev Can only be called by admin
/// @param _token The token to set allowance for
/// @param _value The amount of allowance
/// @param _increase Whether to increase or decrease allowance
function setAssetSwapperAllowance(
address _token,
uint256 _value,
bool _increase
) external onlyRole(DEFAULT_ADMIN_ROLE) {
if (_increase) {
IERC20(_token).safeIncreaseAllowance(
addresses.assetSwapper,
_value
);
} else {
IERC20(_token).safeDecreaseAllowance(
addresses.assetSwapper,
_value
);
}
emit SetAssetSwapperAllowance(_token, _value, _increase);
}
/// @notice Pauses the vault for emergency cases
/// @dev Can only be called by admin
function pause() external onlyRole(DEFAULT_ADMIN_ROLE) {
_pause();
}
/// @notice Unpauses the vault
/// @dev Can only be called by admin
function unpause() external onlyRole(DEFAULT_ADMIN_ROLE) {
_unpause();
}
/// @notice Add a contract to the whitelist
/// @dev Can only be called by the owner
/// @param _contract Address of the contract that needs to be added to the whitelist
function addToContractWhitelist(address _contract)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
_addToContractWhitelist(_contract);
}
/// @notice Remove a contract to the whitelist
/// @dev Can only be called by the owner
/// @param _contract Address of the contract that needs to be removed from the whitelist
function removeFromContractWhitelist(address _contract)
external
onlyRole(DEFAULT_ADMIN_ROLE)
{
_removeFromContractWhitelist(_contract);
}
/// @notice Transfers all funds to msg.sender
/// @dev Can only be called by admin
/// @param tokens The list of erc20 tokens to withdraw
/// @param transferNative Whether should transfer the native currency
function emergencyWithdraw(address[] calldata tokens, bool transferNative)
external
onlyRole(DEFAULT_ADMIN_ROLE)
whenPaused
{
if (transferNative) {
payable(msg.sender).transfer(address(this).balance);
}
for (uint256 i; i < tokens.length; ) {
IERC20 token = IERC20(tokens[i]);
token.safeTransfer(msg.sender, token.balanceOf(address(this)));
unchecked {
++i;
}
}
}
// The following functions are overrides required by Solidity.
function _beforeTokenTransfer(
address from,
address to,
uint256 tokenId,
uint256 batchSize
) internal override(ERC721, ERC721Enumerable) {
super._beforeTokenTransfer(from, to, tokenId, batchSize);
}
function supportsInterface(bytes4 interfaceId)
public
view
override(ERC721, ERC721Enumerable, AccessControl)
returns (bool)
{
return super.supportsInterface(interfaceId);
}
}// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
interface IAssetSwapper {
function swapAsset(
address from,
address to,
uint256 amount,
uint256 minAmountOut,
uint256 swapperId
) external returns (uint256);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.0;
/// @title ContractWhitelist
/// @author witherblock
/// @notice A helper contract that lets you add a list of whitelisted contracts that should be able to interact with restricited functions
abstract contract ContractWhitelist {
/// @dev contract => whitelisted or not
mapping(address => bool) public whitelistedContracts;
/*==== SETTERS ====*/
/// @dev add to the contract whitelist
/// @param _contract the address of the contract to add to the contract whitelist
function _addToContractWhitelist(address _contract) internal {
require(isContract(_contract), "Address must be a contract");
require(
!whitelistedContracts[_contract],
"Contract already whitelisted"
);
whitelistedContracts[_contract] = true;
emit AddToContractWhitelist(_contract);
}
/// @dev remove from the contract whitelist
/// @param _contract the address of the contract to remove from the contract whitelist
function _removeFromContractWhitelist(address _contract) internal {
require(whitelistedContracts[_contract], "Contract not whitelisted");
whitelistedContracts[_contract] = false;
emit RemoveFromContractWhitelist(_contract);
}
// modifier is eligible sender modifier
function _isEligibleSender() internal view {
// the below condition checks whether the caller is a contract or not
if (msg.sender != tx.origin)
require(
whitelistedContracts[msg.sender],
"Contract must be whitelisted"
);
}
/*==== VIEWS ====*/
/// @dev checks for contract or eoa addresses
/// @param addr the address to check
/// @return bool whether the passed address is a contract address
function isContract(address addr) public view returns (bool) {
uint256 size;
assembly {
size := extcodesize(addr)
}
return size > 0;
}
/*==== EVENTS ====*/
event AddToContractWhitelist(address indexed _contract);
event RemoveFromContractWhitelist(address indexed _contract);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.7;
interface IOptionPricing {
function getOptionPrice(
bool isPut,
uint256 expiry,
uint256 strike,
uint256 lastPrice,
uint256 baseIv
) external view returns (uint256);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.7;
interface IPriceOracle {
function getCollateralPrice() external view returns (uint256);
function getUnderlyingPrice() external view returns (uint256);
}//SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.7;
interface IVolatilityOracle {
function getVolatility(uint256) external view returns (uint256);
}{
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs",
"useLiteralContent": true
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": [],
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Mutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"expiry","type":"uint256"}],"name":"bootstrap","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_price","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"uint256","name":"_timeToExpiry","type":"uint256"}],"name":"calculateApFunding","outputs":[{"internalType":"uint256","name":"funding","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bool","name":"_isPut","type":"bool"},{"internalType":"uint256","name":"_price","type":"uint256"},{"internalType":"uint256","name":"_strike","type":"uint256"},{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"uint256","name":"_expiry","type":"uint256"}],"name":"calculatePremium","outputs":[{"internalType":"uint256","name":"premium","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"calculateStraddlePositionPnl","outputs":[{"internalType":"uint256","name":"buyerPnl","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"calculateWritePositionPnl","outputs":[{"internalType":"uint256","name":"writePositionPnl","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"currentEpoch","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"delegationFeePercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bool","name":"shouldRollover","type":"bool"},{"internalType":"address","name":"user","type":"address"}],"name":"deposit","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"tokens","type":"address[]"},{"internalType":"bool","name":"transferNative","type":"bool"}],"name":"emergencyWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"epochCollectionsData","outputs":[{"internalType":"uint256","name":"usdPremiums","type":"uint256"},{"internalType":"uint256","name":"usdFunding","type":"uint256"},{"internalType":"uint256","name":"totalSold","type":"uint256"},{"internalType":"uint256","name":"straddleCounter","type":"uint256"},{"internalType":"uint256","name":"finalUsdBalanceBeforeWithdaw","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"epochData","outputs":[{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"expiry","type":"uint256"},{"internalType":"uint256","name":"usdDeposits","type":"uint256"},{"internalType":"uint256","name":"activeUsdDeposits","type":"uint256"},{"internalType":"uint256","name":"settlementPrice","type":"uint256"},{"internalType":"uint256","name":"settlementPercentage","type":"uint256"},{"internalType":"uint256","name":"underlyingPurchased","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"expireEpoch","outputs":[{"internalType":"bool","name":"expired","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getUnderlyingPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_strike","type":"uint256"}],"name":"getVolatility","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"isContract","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"isEpochExpired","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"isEpochPreExpired","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"isVaultReady","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxDelegationFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"ids","type":"uint256[]"}],"name":"multirollover","outputs":[{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"ids","type":"uint256[]"}],"name":"multisettle","outputs":[{"internalType":"uint256[]","name":"pnls","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pnlSlippagePercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"percentage","type":"uint256"},{"internalType":"uint256","name":"minAmountOut","type":"uint256"},{"internalType":"uint256","name":"swapperId","type":"uint256"}],"name":"preExpireEpoch","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"minAmountOut","type":"uint256"},{"internalType":"uint256","name":"swapperId","type":"uint256"},{"internalType":"address","name":"user","type":"address"}],"name":"purchase","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"uint256","name":"protocolFee","type":"uint256"},{"internalType":"uint256","name":"straddleCost","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"purchaseFeePercent","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_contract","type":"address"}],"name":"removeFromContractWhitelist","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"rollover","outputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"address","name":"usd","type":"address"},{"internalType":"address","name":"underlying","type":"address"},{"internalType":"address","name":"assetSwapper","type":"address"},{"internalType":"address","name":"priceOracle","type":"address"},{"internalType":"address","name":"volatilityOracle","type":"address"},{"internalType":"address","name":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":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"writePositionsOfOwner","outputs":[{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"stateMutability":"view","type":"function"}]Contract Creation Code
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