ERC-20
Overview
Max Total Supply
60,336,027.040881088212672188 sSYNR
Holders
858
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
0.563319804857821885 sSYNRValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
SyntheticSyndicateERC20
Compiler Version
v0.8.1+commit.df193b15
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity 0.8.1; import "../utils/ERC20.sol"; import "../utils/AccessControl.sol"; contract SyntheticSyndicateERC20 is ERC20("Synthetic Syndicate Token", "sSYNR"), AccessControl { /** * @dev Smart contract unique identifier, a random number * @dev Should be regenerated each time smart contact source code is changed * and changes smart contract itself is to be redeployed * @dev Generated using https://www.random.org/bytes/ */ uint256 public constant TOKEN_UID = 0xac3051b8d4f50966afb632468a4f61483ae6a953b74e387a01ef94316d6b7d62; uint32 public constant ROLE_TOKEN_DESTROYER = 0x0002_0000; uint32 public constant ROLE_WHITE_LISTED_RECEIVER = 0x0004_0000; constructor(address _superAdmin) AccessControl(_superAdmin) {} /** * @notice Must be called by ROLE_TOKEN_CREATOR addresses. * * @param recipient address to receive the tokens. * @param amount number of tokens to be minted. */ function mint(address recipient, uint256 amount) external { require(isSenderInRole(ROLE_TOKEN_CREATOR), "sSYNR: insufficient privileges (ROLE_TOKEN_CREATOR required)"); _mint(recipient, amount); } /** * @param amount number of tokens to be burned. */ function burn(uint256 amount) external { _burn(msg.sender, amount); } /** * @notice Must be called by ROLE_TOKEN_DESTROYER addresses (SynrSwapper) * Can burn only tokens owned by ROLE_WHITE_LISTED_RECEIVER address * @param recipient address to burn the tokens. * @param amount number of tokens to be burned */ function burn(address recipient, uint256 amount) external { require(isSenderInRole(ROLE_TOKEN_DESTROYER), "sSYNR: insufficient privileges (ROLE_TOKEN_DESTROYER required)"); require(isOperatorInRole(recipient, ROLE_WHITE_LISTED_RECEIVER), "sSYNR: Non Allowed Receiver"); _burn(recipient, amount); } function _transfer( address sender, address recipient, uint256 amount ) internal virtual override { require(isOperatorInRole(recipient, ROLE_WHITE_LISTED_RECEIVER), "sSYNR: Non Allowed Receiver"); super._transfer(sender, recipient, amount); } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.1; import "../interfaces/IERC20.sol"; /** * @dev Implementation of the {IERC20} interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using {_mint}. * For a generic mechanism see {ERC20PresetMinterPauser}. * * TIP: For a detailed writeup see our guide * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How * to implement supply mechanisms]. * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an {Approval} event is emitted on calls to {transferFrom}. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard {decreaseAllowance} and {increaseAllowance} * functions have been added to mitigate the well-known issues around setting * allowances. See {IERC20-approve}. */ // Copied from Open Zeppelin contract ERC20 is IERC20 { mapping(address => uint256) private _balances; mapping(address => mapping(address => uint256)) private _allowances; uint256 private _totalSupply; string private _name; string private _symbol; uint8 private _decimals; /** * @notice Token creator is responsible for creating (minting) * tokens to an arbitrary address * @dev Role ROLE_TOKEN_CREATOR allows minting tokens * (calling `mint` function) */ uint32 public constant ROLE_TOKEN_CREATOR = 0x0001_0000; /** * @dev Sets the values for {name} and {symbol}, initializes {decimals} with * a default value of 18. * * To select a different value for {decimals}, use {_setupDecimals}. * * All three of these values are immutable: they can only be set once during * construction. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; _decimals = 18; } /** * @dev Returns the name of the token. */ function name() public view virtual returns (string memory) { return _name; } /** * @dev Returns the symbol of the token, usually a shorter version of the * name. */ function symbol() public view virtual returns (string memory) { return _symbol; } /** * @dev Returns the number of decimals used to get its user representation. * For example, if `decimals` equals `2`, a balance of `505` tokens should * be displayed to a user as `5,05` (`505 / 10 ** 2`). * * Tokens usually opt for a value of 18, imitating the relationship between * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is * called. * * NOTE: This information is only used for _display_ purposes: it in * no way affects any of the arithmetic of the contract, including * {IERC20-balanceOf} and {IERC20-transfer}. */ function decimals() public view virtual returns (uint8) { return _decimals; } /** * @dev See {IERC20-totalSupply}. */ function totalSupply() public view virtual override returns (uint256) { return _totalSupply; } /** * @dev See {IERC20-balanceOf}. */ function balanceOf(address account) public view virtual override returns (uint256) { return _balances[account]; } /** * @dev See {IERC20-transfer}. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } /** * @dev See {IERC20-allowance}. */ function allowance(address owner, address spender) public view virtual override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See {IERC20-approve}. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 amount) public virtual override returns (bool) { _approve(msg.sender, spender, amount); return true; } /** * @dev See {IERC20-transferFrom}. * * Emits an {Approval} event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of {ERC20}. * * Requirements: * * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. * - the caller must have allowance for ``sender``'s tokens of at least * `amount`. */ function transferFrom( address sender, address recipient, uint256 amount ) public virtual override returns (bool) { _transfer(sender, recipient, amount); _approve(sender, msg.sender, _allowances[sender][msg.sender] - amount); return true; } /** * @dev Atomically increases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. */ function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender] + addedValue); return true; } /** * @dev Atomically decreases the allowance granted to `spender` by the caller. * * This is an alternative to {approve} that can be used as a mitigation for * problems described in {IERC20-approve}. * * Emits an {Approval} event indicating the updated allowance. * * Requirements: * * - `spender` cannot be the zero address. * - `spender` must have allowance for the caller of at least * `subtractedValue`. */ function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) { _approve(msg.sender, spender, _allowances[msg.sender][spender] - subtractedValue); return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to {transfer}, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a {Transfer} event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer( address sender, address recipient, uint256 amount ) internal virtual { require(sender != address(0), "ERC20: transfer from the zero address"); require(recipient != address(0), "ERC20: transfer to the zero address"); _beforeTokenTransfer(sender, recipient, amount); _balances[sender] = _balances[sender] - amount; _balances[recipient] = _balances[recipient] + amount; emit Transfer(sender, recipient, amount); } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a {Transfer} event with `from` set to the zero address. * * Requirements: * * - `to` cannot be the zero address. */ function _mint(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: mint to the zero address"); _beforeTokenTransfer(address(0), account, amount); _totalSupply = _totalSupply + amount; _balances[account] = _balances[account] + amount; emit Transfer(address(0), account, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a {Transfer} event with `to` set to the zero address. * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { require(account != address(0), "ERC20: burn from the zero address"); _beforeTokenTransfer(account, address(0), amount); _balances[account] = _balances[account] - amount; _totalSupply = _totalSupply - amount; emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens. * * This internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an {Approval} event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve( address owner, address spender, uint256 amount ) internal virtual { require(owner != address(0), "ERC20: approve from the zero address"); require(spender != address(0), "ERC20: approve to the zero address"); _allowances[owner][spender] = amount; emit Approval(owner, spender, amount); } /** * @dev Sets {decimals} to a value other than the default one of 18. * * WARNING: This function should only be called from the constructor. Most * applications that interact with token contracts will not expect * {decimals} to ever change, and may work incorrectly if it does. */ function _setupDecimals(uint8 decimals_) internal virtual { _decimals = decimals_; } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 amount ) internal virtual {} }
// SPDX-License-Identifier: MIT pragma solidity 0.8.1; // import "hardhat/console.sol"; /** * @title Access Control List * * @notice Access control smart contract provides an API to check * if specific operation is permitted globally and/or * if particular user has a permission to execute it. * * @notice It deals with two main entities: features and roles. * * @notice Features are designed to be used to enable/disable specific * functions (public functions) of the smart contract for everyone. * @notice User roles are designed to restrict access to specific * functions (restricted functions) of the smart contract to some users. * * @notice Terms "role", "permissions" and "set of permissions" have equal meaning * in the documentation text and may be used interchangeably. * @notice Terms "permission", "single permission" implies only one permission bit set. * * @dev This smart contract is designed to be inherited by other * smart contracts which require access control management capabilities. * * @author Basil Gorin */ contract AccessControl { /** * @notice Access manager is responsible for assigning the roles to users, * enabling/disabling global features of the smart contract * @notice Access manager can add, remove and update user roles, * remove and update global features * * @dev Role ROLE_ACCESS_MANAGER allows modifying user roles and global features * @dev Role ROLE_ACCESS_MANAGER has single bit at position 255 enabled */ uint256 public constant ROLE_ACCESS_MANAGER = 0x8000000000000000000000000000000000000000000000000000000000000000; /** * @dev Bitmask representing all the possible permissions (super admin role) * @dev Has all the bits are enabled (2^256 - 1 value) */ // solhint-disable-next-line uint256 private constant FULL_PRIVILEGES_MASK = type(uint256).max; // before 0.8.0: uint256(-1) overflows to 0xFFFF... /** * @notice Privileged addresses with defined roles/permissions * @notice In the context of ERC20/ERC721 tokens these can be permissions to * allow minting or burning tokens, transferring on behalf and so on * * @dev Maps user address to the permissions bitmask (role), where each bit * represents a permission * @dev Bitmask 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF * represents all possible permissions * @dev Zero address mapping represents global features of the smart contract */ mapping(address => uint256) public userRoles; /** * @dev Fired in updateRole() and updateFeatures() * * @param _by operator which called the function * @param _to address which was granted/revoked permissions * @param _requested permissions requested * @param _actual permissions effectively set */ event RoleUpdated(address indexed _by, address indexed _to, uint256 _requested, uint256 _actual); /** * @notice Creates an access control instance, * setting contract creator to have full privileges */ constructor(address _superAdmin) { userRoles[_superAdmin] = FULL_PRIVILEGES_MASK; userRoles[msg.sender] = FULL_PRIVILEGES_MASK; } /** * @notice Retrieves globally set of features enabled * * @dev Auxiliary getter function to maintain compatibility with previous * versions of the Access Control List smart contract, where * features was a separate uint256 public field * * @return 256-bit bitmask of the features enabled */ function features() public view returns (uint256) { // according to new design features are stored in zero address // mapping of `userRoles` structure return userRoles[address(0)]; } /** * @notice Updates set of the globally enabled features (`features`), * taking into account sender's permissions * * @dev Requires transaction sender to have `ROLE_ACCESS_MANAGER` permission * @dev Function is left for backward compatibility with older versions * * @param _mask bitmask representing a set of features to enable/disable */ function updateFeatures(uint256 _mask) public { // delegate call to `updateRole` updateRole(address(0), _mask); } /** * @notice Updates set of permissions (role) for a given user, * taking into account sender's permissions. * * @dev Setting role to zero is equivalent to removing an all permissions * @dev Setting role to `FULL_PRIVILEGES_MASK` is equivalent to * copying senders' permissions (role) to the user * @dev Requires transaction sender to have `ROLE_ACCESS_MANAGER` permission * * @param operator address of a user to alter permissions for or zero * to alter global features of the smart contract * @param role bitmask representing a set of permissions to * enable/disable for a user specified */ function updateRole(address operator, uint256 role) public { // caller must have a permission to update user roles require(isSenderInRole(ROLE_ACCESS_MANAGER), "insufficient privileges (ROLE_ACCESS_MANAGER required)"); // evaluate the role and reassign it userRoles[operator] = evaluateBy(msg.sender, userRoles[operator], role); // fire an event emit RoleUpdated(msg.sender, operator, role, userRoles[operator]); } /** * @notice Determines the permission bitmask an operator can set on the * target permission set * @notice Used to calculate the permission bitmask to be set when requested * in `updateRole` and `updateFeatures` functions * * @dev Calculated based on: * 1) operator's own permission set read from userRoles[operator] * 2) target permission set - what is already set on the target * 3) desired permission set - what do we want set target to * * @dev Corner cases: * 1) Operator is super admin and its permission set is `FULL_PRIVILEGES_MASK`: * `desired` bitset is returned regardless of the `target` permission set value * (what operator sets is what they get) * 2) Operator with no permissions (zero bitset): * `target` bitset is returned regardless of the `desired` value * (operator has no authority and cannot modify anything) * * @dev Example: * Consider an operator with the permissions bitmask 00001111 * is about to modify the target permission set 01010101 * Operator wants to set that permission set to 00110011 * Based on their role, an operator has the permissions * to update only lowest 4 bits on the target, meaning that * high 4 bits of the target set in this example is left * unchanged and low 4 bits get changed as desired: 01010011 * * @param operator address of the contract operator which is about to set the permissions * @param target input set of permissions to operator is going to modify * @param desired desired set of permissions operator would like to set * @return resulting set of permissions given operator will set */ function evaluateBy( address operator, uint256 target, uint256 desired ) public view returns (uint256) { // read operator's permissions uint256 p = userRoles[operator]; // taking into account operator's permissions, // 1) enable the permissions desired on the `target` target |= p & desired; // 2) disable the permissions desired on the `target` target &= FULL_PRIVILEGES_MASK ^ (p & (FULL_PRIVILEGES_MASK ^ desired)); // return calculated result return target; } /** * @notice Checks if requested set of features is enabled globally on the contract * * @param required set of features to check against * @return true if all the features requested are enabled, false otherwise */ function isFeatureEnabled(uint256 required) public view returns (bool) { // delegate call to `__hasRole`, passing `features` property return __hasRole(features(), required); } /** * @notice Checks if transaction sender `msg.sender` has all the permissions required * * @param required set of permissions (role) to check against * @return true if all the permissions requested are enabled, false otherwise */ function isSenderInRole(uint256 required) public view returns (bool) { // delegate call to `isOperatorInRole`, passing transaction sender return isOperatorInRole(msg.sender, required); } /** * @notice Checks if operator has all the permissions (role) required * * @param operator address of the user to check role for * @param required set of permissions (role) to check * @return true if all the permissions requested are enabled, false otherwise */ function isOperatorInRole(address operator, uint256 required) public view returns (bool) { // delegate call to `__hasRole`, passing operator's permissions (role) return __hasRole(userRoles[operator], required); } /** * @dev Checks if role `actual` contains all the permissions required `required` * * @param actual existent role * @param required required role * @return true if actual has required role (all permissions), false otherwise */ function __hasRole(uint256 actual, uint256 required) internal pure returns (bool) { // check the bitmask for the role required and return the result return actual & required == required; } }
// SPDX-License-Identifier: MIT pragma solidity 0.8.1; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address recipient, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address sender, address recipient, uint256 amount ) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000008e75aee46961019a66a88670ec18f022b8ef815e
-----Decoded View---------------
Arg [0] : _superAdmin (address): 0x8e75AEe46961019A66A88670ec18f022B8ef815E
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000008e75aee46961019a66a88670ec18f022b8ef815e
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