Documentation Index
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ERC20 token that is used as wrapped asset to represent the native token value on the other chains.
Variables
MINTER_ROLE
bytes32 public constant MINTER_ROLE;
Minter role identifier
PAUSER_ROLE
bytes32 public constant PAUSER_ROLE;
Pauser role identifier
DOMAIN_SEPARATOR
bytes32 public DOMAIN_SEPARATOR;
Domain separator as described in EIP-712
PERMIT_TYPEHASH
bytes32 public constant PERMIT_TYPEHASH;
Typehash as described in EIP-712.
typehash = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)")
nonces
mapping(address => uint256) public nonces;
Transfers counter
_decimals
uint8 internal _decimals;
Asset’s decimals
Functions
initialize
function initialize(
string name_,
string symbol_,
uint8 decimals_,
address admin,
address[] minters
) public
Constructor that initializes the most important configurations.
Parameters:
| Name | Type | Description |
|---|
| name_ | string | Asset’s name. |
| symbol_ | string | Asset’s symbol. |
| decimals_ | uint8 | Asset’s decimals. |
| admin | address | Address to set as asset’s admin. |
| minters | address[] | The accounts allowed to mint new tokens. |
mint
function mint(
address _receiver,
uint256 _amount
) external
Issues new tokens.
Parameters:
| Name | Type | Description |
|---|
| _receiver | address | Token’s receiver. |
| _amount | uint256 | Amount to be minted. |
burn
function burn(
uint256 _amount
) external
Destroys existing tokens.
Parameters:
| Name | Type | Description |
|---|
| _amount | uint256 | Amount to be burnt. |
permit
function permit(
address _owner,
address _spender,
uint256 _value,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
) external
Approves the spender by signature.
Parameters:
| Name | Type | Description |
|---|
| _owner | address | Token’s owner. |
| _spender | address | Account to be approved. |
| _value | uint256 | Amount to be approved. |
| _deadline | uint256 | The permit valid until. |
| _v | uint8 | Signature part. |
| _r | bytes32 | Signature part. |
| _s | bytes32 | Signature part. |
decimals
function decimals() public returns (uint8)
Asset’s decimals
pause
Pauses all token transfers. The caller must have the PAUSER_ROLE.
unpause
function unpause() public
Unpauses all token transfers. The caller must have the PAUSER_ROLE.
_beforeTokenTransfer
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal