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Latest 25 from a total of 1,391 transactions
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Mint | 19113966 | 154 days ago | IN | 0.00044553 ETH | 0.003152 | ||||
Mint | 19045500 | 164 days ago | IN | 0.00041545 ETH | 0.00362309 | ||||
Mint | 19010669 | 168 days ago | IN | 0.00040897 ETH | 0.00403509 | ||||
Mint | 18970046 | 174 days ago | IN | 0.00045353 ETH | 0.00449999 | ||||
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Mint | 18954996 | 176 days ago | IN | 0.00045947 ETH | 0.00629496 | ||||
Mint | 18953430 | 176 days ago | IN | 0.00045768 ETH | 0.00736161 | ||||
Mint | 18946275 | 177 days ago | IN | 0.00045939 ETH | 0.00324106 | ||||
Mint | 18941910 | 178 days ago | IN | 0.0004598 ETH | 0.00717203 | ||||
Mint | 18938982 | 178 days ago | IN | 0.00045765 ETH | 0.00351778 | ||||
Mint | 18937853 | 179 days ago | IN | 0.0004546 ETH | 0.00449535 | ||||
Mint | 18933053 | 179 days ago | IN | 0.00046314 ETH | 0.00440674 | ||||
Mint | 18932479 | 179 days ago | IN | 0.00045963 ETH | 0.00353452 | ||||
Mint | 18920074 | 181 days ago | IN | 0.00042927 ETH | 0.00500318 | ||||
Mint | 18918906 | 181 days ago | IN | 0.00042451 ETH | 0.00394994 | ||||
Mint | 18916380 | 182 days ago | IN | 0.0004305 ETH | 0.00456445 | ||||
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Mint | 18909425 | 183 days ago | IN | 0.00044721 ETH | 0.00250957 |
Latest 25 internal transactions (View All)
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18933053 | 179 days ago | 0.00045186 ETH | ||||
18932479 | 179 days ago | 0.00001117 ETH |
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Contract Name:
SoulboundGreen
Compiler Version
v0.8.7+commit.e28d00a7
Optimization Enabled:
Yes with 1 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; import "./libraries/Errors.sol"; import "./tokens/MasaSBTSelfSovereign.sol"; /// @title Soulbound Two-factor authentication (Green - 2FA) /// @author Masa Finance /// @notice Soulbound token that represents a Two-factor authentication (2FA) /// @dev Soulbound Green, that inherits from the SBT contract. contract SoulboundGreen is MasaSBTSelfSovereign, ReentrancyGuard { /* ========== STATE VARIABLES =========================================== */ /* ========== INITIALIZE ================================================ */ /// @notice Creates a new soulbound Two-factor authentication (Green - 2FA) /// @dev Creates a new soulbound Green, inheriting from the SBT contract. /// @param admin Administrator of the smart contract /// @param baseTokenURI Base URI of the token /// @param soulboundIdentity Address of the SoulboundIdentity contract /// @param paymentParams Payment gateway params constructor( address admin, string memory baseTokenURI, ISoulboundIdentity soulboundIdentity, PaymentParams memory paymentParams ) MasaSBTSelfSovereign( admin, "Masa Green", "MG-2FA", baseTokenURI, soulboundIdentity, paymentParams ) EIP712("SoulboundGreen", "1.0.0") {} /* ========== RESTRICTED FUNCTIONS ====================================== */ /* ========== MUTATIVE FUNCTIONS ======================================== */ /// @notice Mints a new SBT /// @dev The caller must have the MINTER role /// @param paymentMethod Address of token that user want to pay /// @param identityId TokenId of the identity to mint the NFT to /// @param authorityAddress Address of the authority that signed the message /// @param signatureDate Date of the signature /// @param signature Signature of the message /// @return The NFT ID of the newly minted SBT function mint( address paymentMethod, uint256 identityId, address authorityAddress, uint256 signatureDate, bytes calldata signature ) public payable virtual nonReentrant returns (uint256) { address to = soulboundIdentity.ownerOf(identityId); if (to != _msgSender()) revert CallerNotOwner(_msgSender()); _verify( _hash(identityId, authorityAddress, signatureDate), signature, authorityAddress ); _pay(paymentMethod, getMintPrice(paymentMethod)); uint256 tokenId = _mintWithCounter(to); emit SoulboundGreenMintedToIdentity( tokenId, identityId, authorityAddress, signatureDate, paymentMethod, mintPrice ); return tokenId; } /// @notice Mints a new SBT /// @dev The caller must have the MINTER role /// @param paymentMethod Address of token that user want to pay /// @param to The address to mint the SBT to /// @param authorityAddress Address of the authority that signed the message /// @param signatureDate Date of the signature /// @param signature Signature of the message /// @return The SBT ID of the newly minted SBT function mint( address paymentMethod, address to, address authorityAddress, uint256 signatureDate, bytes calldata signature ) external payable virtual returns (uint256) { if (to != _msgSender()) revert CallerNotOwner(_msgSender()); _verify( _hash(to, authorityAddress, signatureDate), signature, authorityAddress ); _pay(paymentMethod, getMintPrice(paymentMethod)); uint256 tokenId = _mintWithCounter(to); emit SoulboundGreenMintedToAddress( tokenId, to, authorityAddress, signatureDate, paymentMethod, mintPrice ); return tokenId; } /* ========== VIEWS ===================================================== */ /* ========== PRIVATE FUNCTIONS ========================================= */ function _hash( uint256 identityId, address authorityAddress, uint256 signatureDate ) internal view returns (bytes32) { return _hashTypedDataV4( keccak256( abi.encode( keccak256( "MintGreen(uint256 identityId,address authorityAddress,uint256 signatureDate)" ), identityId, authorityAddress, signatureDate ) ) ); } function _hash( address to, address authorityAddress, uint256 signatureDate ) internal view returns (bytes32) { return _hashTypedDataV4( keccak256( abi.encode( keccak256( "MintGreen(address to,address authorityAddress,uint256 signatureDate)" ), to, authorityAddress, signatureDate ) ) ); } /* ========== MODIFIERS ================================================= */ /* ========== EVENTS ==================================================== */ event SoulboundGreenMintedToIdentity( uint256 tokenId, uint256 identityId, address authorityAddress, uint256 signatureDate, address paymentMethod, uint256 mintPrice ); event SoulboundGreenMintedToAddress( uint256 tokenId, address to, address authorityAddress, uint256 signatureDate, address paymentMethod, uint256 mintPrice ); }
// 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 v4.8.0) (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 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 v4.6.0) (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 (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) (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/cryptography/draft-EIP712.sol) pragma solidity ^0.8.0; // EIP-712 is Final as of 2022-08-11. This file is deprecated. import "./EIP712.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV // Deprecated in v4.8 } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/EIP712.sol) pragma solidity ^0.8.0; import "./ECDSA.sol"; /** * @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data. * * The encoding specified in the EIP is very generic, and such a generic implementation in Solidity is not feasible, * thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding * they need in their contracts using a combination of `abi.encode` and `keccak256`. * * This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding * scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA * ({_hashTypedDataV4}). * * The implementation of the domain separator was designed to be as efficient as possible while still properly updating * the chain id to protect against replay attacks on an eventual fork of the chain. * * NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method * https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. * * _Available since v3.4._ */ abstract contract EIP712 { /* solhint-disable var-name-mixedcase */ // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to // invalidate the cached domain separator if the chain id changes. bytes32 private immutable _CACHED_DOMAIN_SEPARATOR; uint256 private immutable _CACHED_CHAIN_ID; address private immutable _CACHED_THIS; bytes32 private immutable _HASHED_NAME; bytes32 private immutable _HASHED_VERSION; bytes32 private immutable _TYPE_HASH; /* solhint-enable var-name-mixedcase */ /** * @dev Initializes the domain separator and parameter caches. * * The meaning of `name` and `version` is specified in * https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]: * * - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. * - `version`: the current major version of the signing domain. * * NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart * contract upgrade]. */ constructor(string memory name, string memory version) { bytes32 hashedName = keccak256(bytes(name)); bytes32 hashedVersion = keccak256(bytes(version)); bytes32 typeHash = keccak256( "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)" ); _HASHED_NAME = hashedName; _HASHED_VERSION = hashedVersion; _CACHED_CHAIN_ID = block.chainid; _CACHED_DOMAIN_SEPARATOR = _buildDomainSeparator(typeHash, hashedName, hashedVersion); _CACHED_THIS = address(this); _TYPE_HASH = typeHash; } /** * @dev Returns the domain separator for the current chain. */ function _domainSeparatorV4() internal view returns (bytes32) { if (address(this) == _CACHED_THIS && block.chainid == _CACHED_CHAIN_ID) { return _CACHED_DOMAIN_SEPARATOR; } else { return _buildDomainSeparator(_TYPE_HASH, _HASHED_NAME, _HASHED_VERSION); } } function _buildDomainSeparator( bytes32 typeHash, bytes32 nameHash, bytes32 versionHash ) private view returns (bytes32) { return keccak256(abi.encode(typeHash, nameHash, versionHash, block.chainid, address(this))); } /** * @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this * function returns the hash of the fully encoded EIP712 message for this domain. * * This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: * * ```solidity * bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( * keccak256("Mail(address to,string contents)"), * mailTo, * keccak256(bytes(mailContents)) * ))); * address signer = ECDSA.recover(digest, signature); * ``` */ function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) { return ECDSA.toTypedDataHash(_domainSeparatorV4(), structHash); } }
// 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: MIT // OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol) pragma solidity ^0.8.0; // CAUTION // This version of SafeMath should only be used with Solidity 0.8 or later, // because it relies on the compiler's built in overflow checks. /** * @dev Wrappers over Solidity's arithmetic operations. * * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler * now has built in overflow checking. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } } /** * @dev Returns the subtraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b > a) return (false, 0); return (true, a - b); } } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) return (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a / b); } } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { unchecked { if (b == 0) return (false, 0); return (true, a % b); } } /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { return a + b; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return a - b; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { return a * b; } /** * @dev Returns the integer division of two unsigned integers, reverting on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. * * Requirements: * * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b <= a, errorMessage); return a - b; } } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function div( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a / b; } } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * * - The divisor cannot be zero. */ function mod( uint256 a, uint256 b, string memory errorMessage ) internal pure returns (uint256) { unchecked { require(b > 0, errorMessage); return a % b; } } }
// 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 pragma solidity ^0.8.7; import "@openzeppelin/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/contracts/utils/math/SafeMath.sol"; import "../libraries/Errors.sol"; import "../interfaces/dex/IUniswapRouter.sol"; /// @title Pay using a Decentralized automated market maker (AMM) when needed /// @author Masa Finance /// @notice Smart contract to call a Dex AMM smart contract to pay to a reserve wallet recipient /// @dev This smart contract will call the Uniswap Router interface, based on /// https://github.com/Uniswap/v2-periphery/blob/master/contracts/interfaces/IUniswapV2Router01.sol abstract contract PaymentGateway is AccessControl { using SafeERC20 for IERC20; using SafeMath for uint256; struct PaymentParams { address swapRouter; // Swap router address address wrappedNativeToken; // Wrapped native token address address stableCoin; // Stable coin to pay the fee in (USDC) address masaToken; // Utility token to pay the fee in (MASA) address reserveWallet; // Wallet that will receive the fee } /* ========== STATE VARIABLES =========================================== */ address public swapRouter; address public wrappedNativeToken; address public stableCoin; // USDC. It also needs to be enabled as payment method, if we want to pay in USDC address public masaToken; // MASA. It also needs to be enabled as payment method, if we want to pay in MASA // enabled payment methods: ETH and ERC20 tokens mapping(address => bool) public enabledPaymentMethod; address[] public enabledPaymentMethods; address public reserveWallet; /* ========== INITIALIZE ================================================ */ /// @notice Creates a new Dex AMM /// @dev Creates a new Decentralized automated market maker (AMM) smart contract, // that will call the Uniswap Router interface /// @param admin Administrator of the smart contract /// @param paymentParams Payment params constructor(address admin, PaymentParams memory paymentParams) { if (paymentParams.swapRouter == address(0)) revert ZeroAddress(); if (paymentParams.wrappedNativeToken == address(0)) revert ZeroAddress(); if (paymentParams.stableCoin == address(0)) revert ZeroAddress(); if (paymentParams.reserveWallet == address(0)) revert ZeroAddress(); _grantRole(DEFAULT_ADMIN_ROLE, admin); swapRouter = paymentParams.swapRouter; wrappedNativeToken = paymentParams.wrappedNativeToken; stableCoin = paymentParams.stableCoin; masaToken = paymentParams.masaToken; reserveWallet = paymentParams.reserveWallet; } /* ========== RESTRICTED FUNCTIONS ====================================== */ /// @notice Sets the swap router address /// @dev The caller must have the admin role to call this function /// @param _swapRouter New swap router address function setSwapRouter( address _swapRouter ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_swapRouter == address(0)) revert ZeroAddress(); if (swapRouter == _swapRouter) revert SameValue(); swapRouter = _swapRouter; } /// @notice Sets the wrapped native token address /// @dev The caller must have the admin role to call this function /// @param _wrappedNativeToken New wrapped native token address function setWrappedNativeToken( address _wrappedNativeToken ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_wrappedNativeToken == address(0)) revert ZeroAddress(); if (wrappedNativeToken == _wrappedNativeToken) revert SameValue(); wrappedNativeToken = _wrappedNativeToken; } /// @notice Sets the stable coin to pay the fee in (USDC) /// @dev The caller must have the admin role to call this function /// @param _stableCoin New stable coin to pay the fee in function setStableCoin( address _stableCoin ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_stableCoin == address(0)) revert ZeroAddress(); if (stableCoin == _stableCoin) revert SameValue(); stableCoin = _stableCoin; } /// @notice Sets the utility token to pay the fee in (MASA) /// @dev The caller must have the admin role to call this function /// It can be set to address(0) to disable paying in MASA /// @param _masaToken New utility token to pay the fee in function setMasaToken( address _masaToken ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (masaToken == _masaToken) revert SameValue(); masaToken = _masaToken; } /// @notice Adds a new token as a valid payment method /// @dev The caller must have the admin role to call this function /// @param _paymentMethod New token to add function enablePaymentMethod( address _paymentMethod ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (enabledPaymentMethod[_paymentMethod]) revert AlreadyAdded(); enabledPaymentMethod[_paymentMethod] = true; enabledPaymentMethods.push(_paymentMethod); } /// @notice Removes a token as a valid payment method /// @dev The caller must have the admin role to call this function /// @param _paymentMethod Token to remove function disablePaymentMethod( address _paymentMethod ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (!enabledPaymentMethod[_paymentMethod]) revert NonExistingErc20Token(_paymentMethod); enabledPaymentMethod[_paymentMethod] = false; for (uint256 i = 0; i < enabledPaymentMethods.length; i++) { if (enabledPaymentMethods[i] == _paymentMethod) { enabledPaymentMethods[i] = enabledPaymentMethods[ enabledPaymentMethods.length - 1 ]; enabledPaymentMethods.pop(); break; } } } /// @notice Set the reserve wallet /// @dev The caller must have the admin role to call this function /// @param _reserveWallet New reserve wallet function setReserveWallet( address _reserveWallet ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_reserveWallet == address(0)) revert ZeroAddress(); if (_reserveWallet == reserveWallet) revert SameValue(); reserveWallet = _reserveWallet; } /* ========== MUTATIVE FUNCTIONS ======================================== */ /* ========== VIEWS ===================================================== */ /// @notice Returns all available payment methods /// @dev Returns the address of all available payment methods /// @return Array of all enabled payment methods function getEnabledPaymentMethods() external view returns (address[] memory) { return enabledPaymentMethods; } /* ========== PRIVATE FUNCTIONS ========================================= */ /// @notice Converts an amount from a stable coin to a payment method amount /// @dev This method will perform the swap between the stable coin and the /// payment method, and return the amount of the payment method, /// performing the swap if necessary /// @param paymentMethod Address of token that user want to pay /// @param amount Price to be converted in the specified payment method function _convertFromStableCoin( address paymentMethod, uint256 amount ) internal view returns (uint256) { if (!enabledPaymentMethod[paymentMethod] || paymentMethod == stableCoin) revert InvalidToken(paymentMethod); if (paymentMethod == address(0)) { return _estimateSwapAmount(wrappedNativeToken, stableCoin, amount); } else { return _estimateSwapAmount(paymentMethod, stableCoin, amount); } } /// @notice Performs the payment in any payment method /// @dev This method will transfer the funds to the reserve wallet, performing /// the swap if necessary /// @param paymentMethod Address of token that user want to pay /// @param amount Price to be paid in the specified payment method function _pay(address paymentMethod, uint256 amount) internal { if (amount == 0) return; if (!enabledPaymentMethod[paymentMethod]) revert InvalidPaymentMethod(paymentMethod); if (paymentMethod == address(0)) { // ETH if (msg.value < amount) revert InsufficientEthAmount(amount); (bool success, ) = payable(reserveWallet).call{value: amount}(""); if (!success) revert TransferFailed(); if (msg.value > amount) { // return diff uint256 refund = msg.value.sub(amount); (success, ) = payable(msg.sender).call{value: refund}(""); if (!success) revert RefundFailed(); } } else { // ERC20 token, including MASA and USDC IERC20(paymentMethod).safeTransferFrom( msg.sender, reserveWallet, amount ); } } function _estimateSwapAmount( address _fromToken, address _toToken, uint256 _amountOut ) private view returns (uint256) { uint256[] memory amounts; address[] memory path; path = _getPathFromTokenToToken(_fromToken, _toToken); amounts = IUniswapRouter(swapRouter).getAmountsIn(_amountOut, path); return amounts[0]; } function _getPathFromTokenToToken( address fromToken, address toToken ) private view returns (address[] memory) { if (fromToken == wrappedNativeToken || toToken == wrappedNativeToken) { address[] memory path = new address[](2); path[0] = fromToken == wrappedNativeToken ? wrappedNativeToken : fromToken; path[1] = toToken == wrappedNativeToken ? wrappedNativeToken : toToken; return path; } else { address[] memory path = new address[](3); path[0] = fromToken; path[1] = wrappedNativeToken; path[2] = toToken; return path; } } /* ========== MODIFIERS ================================================= */ /* ========== EVENTS ==================================================== */ }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; /// @title Uniswap Router interface /// @author Masa Finance /// @notice Interface of the Uniswap Router contract /// @dev This interface is used to interact with the Uniswap Router contract, /// and gets the most important functions of the contract. It's based on /// https://github.com/Uniswap/v2-periphery/blob/master/contracts/interfaces/IUniswapV2Router01.sol interface IUniswapRouter { function swapExactTokensForTokens( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); function swapExactETHForTokens( uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external payable returns (uint256[] memory amounts); function swapExactTokensForETH( uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline ) external returns (uint256[] memory amounts); function getAmountsOut( uint256 amountIn, address[] calldata path ) external view returns (uint256[] memory amounts); function getAmountsIn( uint256 amountOut, address[] calldata path ) external view returns (uint256[] memory amounts); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "../tokens/SBT/ISBT.sol"; interface ILinkableSBT is ISBT { function addLinkPrice() external view returns (uint256); function addLinkPriceMASA() external view returns (uint256); function queryLinkPrice() external view returns (uint256); function queryLinkPriceMASA() external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "../tokens/SBT/ISBT.sol"; import "./ISoulName.sol"; interface ISoulboundIdentity is ISBT { function mint(address to) external returns (uint256); function mintIdentityWithName( address to, string memory name, uint256 yearsPeriod, string memory _tokenURI ) external returns (uint256); function getSoulName() external view returns (ISoulName); function tokenOfOwner(address owner) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; interface ISoulName { function mint( address to, string memory name, uint256 yearsPeriod, string memory _tokenURI ) external returns (uint256); function getExtension() external view returns (string memory); function isAvailable( string memory name ) external view returns (bool available); function getTokenData( string memory name ) external view returns ( string memory sbtName, bool linked, uint256 identityId, uint256 tokenId, uint256 expirationDate, bool active ); function getTokenId(string memory name) external view returns (uint256); function getSoulNames( address owner ) external view returns (string[] memory sbtNames); function getSoulNames( uint256 identityId ) external view returns (string[] memory sbtNames); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; error AddressDoesNotHaveIdentity(address to); error AlreadyAdded(); error AuthorityNotExists(address authority); error CallerNotOwner(address caller); error CallerNotReader(address caller); error CreditScoreAlreadyCreated(address to); error IdentityAlreadyCreated(address to); error IdentityOwnerIsReader(uint256 readerIdentityId); error InsufficientEthAmount(uint256 amount); error IdentityOwnerNotTokenOwner(uint256 tokenId, uint256 ownerIdentityId); error InvalidPaymentMethod(address paymentMethod); error InvalidSignature(); error InvalidSignatureDate(uint256 signatureDate); error InvalidToken(address token); error InvalidTokenURI(string tokenURI); error LinkAlreadyExists( address token, uint256 tokenId, uint256 readerIdentityId, uint256 signatureDate ); error LinkAlreadyRevoked(); error LinkDoesNotExist(); error NameAlreadyExists(string name); error NameNotFound(string name); error NameRegisteredByOtherAccount(string name, uint256 tokenId); error NotAuthorized(address signer); error NonExistingErc20Token(address erc20token); error NotLinkedToAnIdentitySBT(); error RefundFailed(); error SameValue(); error SBTAlreadyLinked(address token); error SoulNameContractNotSet(); error TokenNotFound(uint256 tokenId); error TransferFailed(); error URIAlreadyExists(string tokenURI); error ValidPeriodExpired(uint256 expirationDate); error ZeroAddress(); error ZeroLengthName(string name); error ZeroYearsPeriod(uint256 yearsPeriod);
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "@openzeppelin/contracts/access/AccessControl.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "../libraries/Errors.sol"; import "../interfaces/ILinkableSBT.sol"; import "./SBT/SBT.sol"; import "./SBT/extensions/SBTEnumerable.sol"; import "./SBT/extensions/SBTBurnable.sol"; /// @title MasaSBT /// @author Masa Finance /// @notice Soulbound token. Non-fungible token that is not transferable. /// @dev Implementation of https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4105763 Soulbound token. abstract contract MasaSBT is SBT, SBTEnumerable, AccessControl, SBTBurnable, ILinkableSBT { /* ========== STATE VARIABLES =========================================== */ using Strings for uint256; string private _baseTokenURI; uint256 public override addLinkPrice; // price in stable coin uint256 public override addLinkPriceMASA; // price in MASA uint256 public override queryLinkPrice; // price in stable coin uint256 public override queryLinkPriceMASA; // price in MASA /* ========== INITIALIZE ================================================ */ /// @notice Creates a new soulbound token /// @dev Creates a new soulbound token /// @param admin Administrator of the smart contract /// @param name Name of the token /// @param symbol Symbol of the token /// @param baseTokenURI Base URI of the token constructor( address admin, string memory name, string memory symbol, string memory baseTokenURI ) SBT(name, symbol) { _grantRole(DEFAULT_ADMIN_ROLE, admin); _baseTokenURI = baseTokenURI; } /* ========== RESTRICTED FUNCTIONS ====================================== */ /// @notice Sets the price for adding the link in SoulLinker in stable coin /// @dev The caller must have the admin role to call this function /// @param _addLinkPrice New price for adding the link in SoulLinker in stable coin function setAddLinkPrice( uint256 _addLinkPrice ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (addLinkPrice == _addLinkPrice) revert SameValue(); addLinkPrice = _addLinkPrice; } /// @notice Sets the price for adding the link in SoulLinker in MASA /// @dev The caller must have the admin role to call this function /// @param _addLinkPriceMASA New price for adding the link in SoulLinker in MASA function setAddLinkPriceMASA( uint256 _addLinkPriceMASA ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (addLinkPriceMASA == _addLinkPriceMASA) revert SameValue(); addLinkPriceMASA = _addLinkPriceMASA; } /// @notice Sets the price for reading data in SoulLinker in stable coin /// @dev The caller must have the admin role to call this function /// @param _queryLinkPrice New price for reading data in SoulLinker in stable coin function setQueryLinkPrice( uint256 _queryLinkPrice ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (queryLinkPrice == _queryLinkPrice) revert SameValue(); queryLinkPrice = _queryLinkPrice; } /// @notice Sets the price for reading data in SoulLinker in MASA /// @dev The caller must have the admin role to call this function /// @param _queryLinkPriceMASA New price for reading data in SoulLinker in MASA function setQueryLinkPriceMASA( uint256 _queryLinkPriceMASA ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (queryLinkPriceMASA == _queryLinkPriceMASA) revert SameValue(); queryLinkPriceMASA = _queryLinkPriceMASA; } /* ========== MUTATIVE FUNCTIONS ======================================== */ /* ========== VIEWS ===================================================== */ /// @notice Returns true if the token exists /// @dev Returns true if the token has been minted /// @param tokenId Token to check /// @return True if the token exists function exists(uint256 tokenId) external view returns (bool) { return _exists(tokenId); } /// @notice A distinct Uniform Resource Identifier (URI) for a given asset. /// @dev Throws if `_tokenId` is not a valid SBT. URIs are defined in RFC /// 3986. The URI may point to a JSON file that conforms to the "ERC721 /// Metadata JSON Schema". /// @param tokenId SBT to get the URI of /// @return URI of the SBT 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(), ".json")) : ""; } /// @notice Query if a contract implements an interface /// @dev Interface identification is specified in ERC-165. /// @param interfaceId The interface identifier, as specified in ERC-165 /// @return `true` if the contract implements `interfaceId` and /// `interfaceId` is not 0xffffffff, `false` otherwise function supportsInterface( bytes4 interfaceId ) public view virtual override(SBT, SBTEnumerable, AccessControl, IERC165) returns (bool) { return super.supportsInterface(interfaceId); } /* ========== PRIVATE FUNCTIONS ========================================= */ function _baseURI() internal view virtual override returns (string memory) { return _baseTokenURI; } function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override(SBT, SBTEnumerable) { super._beforeTokenTransfer(from, to, tokenId); } /* ========== MODIFIERS ================================================= */ /* ========== EVENTS ==================================================== */ }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "@openzeppelin/contracts/utils/cryptography/draft-EIP712.sol"; import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; import "@openzeppelin/contracts/utils/Counters.sol"; import "../libraries/Errors.sol"; import "../interfaces/ISoulboundIdentity.sol"; import "../dex/PaymentGateway.sol"; import "./MasaSBT.sol"; /// @title MasaSBTSelfSovereign /// @author Masa Finance /// @notice Soulbound token. Non-fungible token that is not transferable. /// Adds a link to a SoulboundIdentity SC to let minting using the identityId /// Adds a payment gateway to let minting paying a fee /// Adds a self-sovereign protocol to let minting using an authority signature /// @dev Implementation of https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4105763 Soulbound token. abstract contract MasaSBTSelfSovereign is PaymentGateway, MasaSBT, EIP712 { /* ========== STATE VARIABLES =========================================== */ using Counters for Counters.Counter; Counters.Counter private _tokenIdCounter; ISoulboundIdentity public soulboundIdentity; uint256 public mintPrice; // price in stable coin uint256 public mintPriceMASA; // price in MASA mapping(address => bool) public authorities; /* ========== INITIALIZE ================================================ */ /// @notice Creates a new soulbound token /// @dev Creates a new soulbound token /// @param admin Administrator of the smart contract /// @param name Name of the token /// @param symbol Symbol of the token /// @param baseTokenURI Base URI of the token /// @param _soulboundIdentity Address of the SoulboundIdentity contract /// @param paymentParams Payment gateway params constructor( address admin, string memory name, string memory symbol, string memory baseTokenURI, ISoulboundIdentity _soulboundIdentity, PaymentParams memory paymentParams ) PaymentGateway(admin, paymentParams) MasaSBT(admin, name, symbol, baseTokenURI) { soulboundIdentity = _soulboundIdentity; } /* ========== RESTRICTED FUNCTIONS ====================================== */ /// @notice Sets the SoulboundIdentity contract address linked to this SBT /// @dev The caller must be the admin to call this function /// @param _soulboundIdentity Address of the SoulboundIdentity contract function setSoulboundIdentity( ISoulboundIdentity _soulboundIdentity ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (soulboundIdentity == _soulboundIdentity) revert SameValue(); soulboundIdentity = _soulboundIdentity; } /// @notice Sets the price of minting in stable coin /// @dev The caller must have the admin role to call this function /// @param _mintPrice New price of minting in stable coin function setMintPrice( uint256 _mintPrice ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (mintPrice == _mintPrice) revert SameValue(); mintPrice = _mintPrice; } /// @notice Sets the price of minting in MASA /// @dev The caller must have the admin role to call this function /// @param _mintPriceMASA New price of minting in MASA function setMintPriceMASA( uint256 _mintPriceMASA ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (mintPriceMASA == _mintPriceMASA) revert SameValue(); mintPriceMASA = _mintPriceMASA; } /// @notice Adds a new authority to the list of authorities /// @dev The caller must have the admin role to call this function /// @param _authority New authority to add function addAuthority( address _authority ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_authority == address(0)) revert ZeroAddress(); if (authorities[_authority]) revert AlreadyAdded(); authorities[_authority] = true; } /// @notice Removes an authority from the list of authorities /// @dev The caller must have the admin role to call this function /// @param _authority Authority to remove function removeAuthority( address _authority ) external onlyRole(DEFAULT_ADMIN_ROLE) { if (_authority == address(0)) revert ZeroAddress(); if (!authorities[_authority]) revert AuthorityNotExists(_authority); authorities[_authority] = false; } /* ========== MUTATIVE FUNCTIONS ======================================== */ /* ========== VIEWS ===================================================== */ /// @notice Returns the identityId owned by the given token /// @param tokenId Id of the token /// @return Id of the identity function getIdentityId(uint256 tokenId) external view returns (uint256) { if (soulboundIdentity == ISoulboundIdentity(address(0))) revert NotLinkedToAnIdentitySBT(); address owner = super.ownerOf(tokenId); return soulboundIdentity.tokenOfOwner(owner); } /// @notice Returns the price for minting /// @dev Returns current pricing for minting /// @param paymentMethod Address of token that user want to pay /// @return Current price for minting in the given payment method function getMintPrice(address paymentMethod) public view returns (uint256) { if (mintPrice == 0 && mintPriceMASA == 0) { return 0; } else if ( paymentMethod == masaToken && enabledPaymentMethod[paymentMethod] && mintPriceMASA > 0 ) { // price in MASA without conversion rate return mintPriceMASA; } else if ( paymentMethod == stableCoin && enabledPaymentMethod[paymentMethod] ) { // stable coin return mintPrice; } else if (enabledPaymentMethod[paymentMethod]) { // ETH and ERC 20 token return _convertFromStableCoin(paymentMethod, mintPrice); } else { revert InvalidPaymentMethod(paymentMethod); } } /// @notice Query if a contract implements an interface /// @dev Interface identification is specified in ERC-165. /// @param interfaceId The interface identifier, as specified in ERC-165 /// @return `true` if the contract implements `interfaceId` and /// `interfaceId` is not 0xffffffff, `false` otherwise function supportsInterface( bytes4 interfaceId ) public view virtual override(AccessControl, MasaSBT) returns (bool) { return super.supportsInterface(interfaceId); } /* ========== PRIVATE FUNCTIONS ========================================= */ function _verify( bytes32 digest, bytes memory signature, address signer ) internal view { address _signer = ECDSA.recover(digest, signature); if (_signer != signer) revert InvalidSignature(); if (!authorities[_signer]) revert NotAuthorized(_signer); } function _mintWithCounter(address to) internal virtual returns (uint256) { uint256 tokenId = _tokenIdCounter.current(); _tokenIdCounter.increment(); _mint(to, tokenId); return tokenId; } /* ========== MODIFIERS ================================================= */ /* ========== EVENTS ==================================================== */ }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "../ISBT.sol"; /** * @title SBT Soulbound Token Standard, optional enumeration extension */ interface ISBTEnumerable is ISBT { /** * @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 pragma solidity ^0.8.7; import "../ISBT.sol"; /** * @title SBT Soulbound Token Standard, optional metadata extension */ interface ISBTMetadata is ISBT { /** * @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 pragma solidity ^0.8.7; import "@openzeppelin/contracts/utils/Context.sol"; import "../SBT.sol"; /** * @title SBT Burnable Token * @dev SBT Token that can be burned (destroyed). */ abstract contract SBTBurnable is Context, SBT { /** * @dev Burns `tokenId`. See {SBT-_burn}. * * Requirements: * * - The caller must own `tokenId` or be an approved operator. */ function burn(uint256 tokenId) public virtual { //solhint-disable-next-line max-line-length require( _isOwner(_msgSender(), tokenId), "SBT: caller is not token owner" ); _burn(tokenId); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "../SBT.sol"; import "./ISBTEnumerable.sol"; /** * @dev This implements an optional extension of {SBT} 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 SBTEnumerable is SBT, ISBTEnumerable { // 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, SBT) returns (bool) { return interfaceId == type(ISBTEnumerable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {ISBTEnumerable-tokenOfOwnerByIndex}. */ function tokenOfOwnerByIndex( address owner, uint256 index ) public view virtual override returns (uint256) { require( index < SBT.balanceOf(owner), "SBTEnumerable: owner index out of bounds" ); return _ownedTokens[owner][index]; } /** * @dev See {ISBTEnumerable-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _allTokens.length; } /** * @dev See {ISBTEnumerable-tokenByIndex}. */ function tokenByIndex( uint256 index ) public view virtual override returns (uint256) { require( index < SBTEnumerable.totalSupply(), "SBTEnumerable: global index out of bounds" ); return _allTokens[index]; } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` cannot be the zero address. * - `to` cannot be the zero address. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual override { super._beforeTokenTransfer(from, to, tokenId); 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 = SBT.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 = SBT.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 pragma solidity ^0.8.7; import "@openzeppelin/contracts/utils/introspection/IERC165.sol"; interface ISBT is IERC165 { /// @dev This emits when an SBT is newly minted. /// This event emits when SBTs are created event Mint(address indexed _owner, uint256 indexed _tokenId); /// @dev This emits when an SBT is burned /// This event emits when SBTs are destroyed event Burn(address indexed _owner, uint256 indexed _tokenId); /// @notice Count all SBTs assigned to an owner /// @dev SBTs assigned to the zero address are considered invalid, and this /// function throws for queries about the zero address. /// @param _owner An address for whom to query the balance /// @return The number of SBTs owned by `_owner`, possibly zero function balanceOf(address _owner) external view returns (uint256); /// @notice Find the owner of an SBT /// @dev SBTs assigned to zero address are considered invalid, and queries /// about them do throw. /// @param _tokenId The identifier for an SBT /// @return The address of the owner of the SBT function ownerOf(uint256 _tokenId) external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.7; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; import "@openzeppelin/contracts/utils/Context.sol"; import "@openzeppelin/contracts/utils/Strings.sol"; import "./ISBT.sol"; import "./extensions/ISBTMetadata.sol"; /// @title SBT /// @author Masa Finance /// @notice Soulbound token is an NFT token that is not transferable. contract SBT is Context, ERC165, ISBT, ISBTMetadata { 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; /** * @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(ISBT).interfaceId || interfaceId == type(ISBTMetadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {ISBT-balanceOf}. */ function balanceOf( address owner ) public view virtual override returns (uint256) { require(owner != address(0), "SBT: address zero is not a valid owner"); return _balances[owner]; } /** * @dev See {ISBT-ownerOf}. */ function ownerOf( uint256 tokenId ) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "SBT: invalid token ID"); return owner; } /** * @dev See {ISBTMetadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {ISBTMetadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {ISBTMetadata-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 Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isOwner( address spender, uint256 tokenId ) internal view virtual returns (bool) { address owner = SBT.ownerOf(tokenId); return (spender == owner); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner. * * 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 _owners[tokenId] != address(0); } /** * @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 {Mint} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "SBT: mint to the zero address"); require(!_exists(tokenId), "SBT: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Mint(to, tokenId); _afterTokenTransfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * * Requirements: * - `tokenId` must exist. * * Emits a {Burn} event. */ function _burn(uint256 tokenId) internal virtual { address owner = SBT.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Burn(owner, tokenId); _afterTokenTransfer(owner, address(0), tokenId); } /** * @dev Reverts if the `tokenId` has not been minted yet. */ function _requireMinted(uint256 tokenId) internal view virtual { require(_exists(tokenId), "SBT: invalid token ID"); } /** * @dev Hook that is called before any token minting/burning * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address, address, uint256) internal virtual {} /** * @dev Hook that is called after any minting/burning of tokens * * Calling conditions: * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer(address, address, uint256) internal virtual {} }
{ "optimizer": { "enabled": true, "runs": 1, "details": { "yul": false } }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
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[{"inputs":[{"internalType":"address","name":"admin","type":"address"},{"internalType":"string","name":"baseTokenURI","type":"string"},{"internalType":"contract ISoulboundIdentity","name":"soulboundIdentity","type":"address"},{"components":[{"internalType":"address","name":"swapRouter","type":"address"},{"internalType":"address","name":"wrappedNativeToken","type":"address"},{"internalType":"address","name":"stableCoin","type":"address"},{"internalType":"address","name":"masaToken","type":"address"},{"internalType":"address","name":"reserveWallet","type":"address"}],"internalType":"struct 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Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : admin (address): 0xBb4125C48e8c69b0F06E0c635dfCd0Aa250fcbF9
Arg [1] : baseTokenURI (string): https://metadata.masa.finance/v1.0/green/mainnet/
Arg [2] : soulboundIdentity (address): 0x8903D8D4F4c06814D7ecb42b1258E2209d53A7d4
Arg [3] : paymentParams (tuple): System.Collections.Generic.List`1[Nethereum.ABI.FunctionEncoding.ParameterOutput]
-----Encoded View---------------
11 Constructor Arguments found :
Arg [0] : 000000000000000000000000bb4125c48e8c69b0f06e0c635dfcd0aa250fcbf9
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000100
Arg [2] : 0000000000000000000000008903d8d4f4c06814d7ecb42b1258e2209d53a7d4
Arg [3] : 0000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d
Arg [4] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [5] : 000000000000000000000000a0b86991c6218b36c1d19d4a2e9eb0ce3606eb48
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [7] : 000000000000000000000000ccfa6a842151f53e18a5d56edfd0177fa8c8d7f5
Arg [8] : 0000000000000000000000000000000000000000000000000000000000000031
Arg [9] : 68747470733a2f2f6d657461646174612e6d6173612e66696e616e63652f7631
Arg [10] : 2e302f677265656e2f6d61696e6e65742f000000000000000000000000000000
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Multichain Portfolio | 26 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
---|---|---|---|---|---|
MATIC | 100.00% | $0.562397 | 0.00053436 | $0.000301 |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.