ERC2771ContextUpgradeable

Inherits: Initializable, ContextUpgradeable

Context variant with ERC-2771 support. WARNING: Avoid using this pattern in contracts that rely in a specific calldata length as they'll be affected by any forwarder whose msg.data is suffixed with the from address according to the ERC-2771 specification adding the address size in bytes (20) to the calldata size. An example of an unexpected behavior could be an unintended fallback (or another function) invocation while trying to invoke the receive function only accessible if msg.data.length == 0. WARNING: The usage of delegatecall in this contract is dangerous and may result in context corruption. Any forwarded request to this contract triggering a delegatecall to itself will result in an invalid _msgSender recovery.

State Variables

_trustedForwarder

Note: oz-upgrades-unsafe-allow: state-variable-immutable

address private immutable _trustedForwarder;

Functions

constructor

Initializes the contract with a trusted forwarder, which will be able to invoke functions on this contract on behalf of other accounts. NOTE: The trusted forwarder can be replaced by overriding trustedForwarder.

Note: oz-upgrades-unsafe-allow: constructor

constructor(address trustedForwarder_);

trustedForwarder

Returns the address of the trusted forwarder.

function trustedForwarder() public view virtual returns (address);

isTrustedForwarder

Indicates whether any particular address is the trusted forwarder.

function isTrustedForwarder(address forwarder) public view virtual returns (bool);

_msgSender

Override for msg.sender. Defaults to the original msg.sender whenever a call is not performed by the trusted forwarder or the calldata length is less than 20 bytes (an address length).

function _msgSender() internal view virtual override returns (address);

_msgData

Override for msg.data. Defaults to the original msg.data whenever a call is not performed by the trusted forwarder or the calldata length is less than 20 bytes (an address length).

function _msgData() internal view virtual override returns (bytes calldata);

_contextSuffixLength

ERC-2771 specifies the context as being a single address (20 bytes).

function _contextSuffixLength() internal view virtual override returns (uint256);