ERC20PresetMinterPauser

Git Source

Inherits: Context, AccessControlEnumerable, ERC20Burnable, ERC20Pausable

*{ERC20} token, including:

• ability for holders to burn (destroy) their tokens
• a minter role that allows for token minting (creation)
• a pauser role that allows to stop all token transfers This contract uses {AccessControl} to lock permissioned functions using the different roles - head to its documentation for details. The account that deploys the contract will be granted the minter and pauser roles, as well as the default admin role, which will let it grant both minter and pauser roles to other accounts. Deprecated in favor of https://wizard.openzeppelin.com/[Contracts Wizard].*

State Variables

MINTER_ROLE

bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");

PAUSER_ROLE

bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");

Functions

constructor

Grants DEFAULT_ADMIN_ROLE, MINTER_ROLE and PAUSER_ROLE to the account that deploys the contract. See ERC20-constructor.

constructor(
    string memory name,
    string memory symbol,
    address _admin,
    address _minter,
    address _pauser
) ERC20(name, symbol);

mint

*Creates amount new tokens for to. See ERC20-_mint. Requirements:

• the caller must have the MINTER_ROLE.*

function mint(address to, uint256 amount) public virtual;

pause

*Pauses all token transfers. See {ERC20Pausable} and {Pausable-_pause}. Requirements:

• the caller must have the PAUSER_ROLE.*

function pause() public virtual;

unpause

*Unpauses all token transfers. See {ERC20Pausable} and {Pausable-_unpause}. Requirements:

• the caller must have the PAUSER_ROLE.*

function unpause() public virtual;

_update

function _update(address from, address to, uint256 value)
    internal
    virtual
    override(ERC20, ERC20Pausable)
    whenNotPaused;