Solidity API

ERC2771Internal

Abstract contract implementing ERC2771 meta-transactions support. This contract extends OpenZeppelin's Context contract to provide trusted forwarder functionality for meta-transactions.

_isTrustedForwarder

function _isTrustedForwarder(address forwarder) internal view virtual returns (bool)

Checks if the given address is a trusted forwarder.

Parameters

Name	Type	Description
forwarder	address	The address to check.

Return Values

Name	Type	Description
[0]	bool	bool True if the address is a trusted forwarder, false otherwise.

_msgSender

function _msgSender() internal view virtual returns (address sender)

_Overrides the msgSender() function to support meta-transactions. If the message sender is a trusted forwarder, it extracts the original sender from the last 20 bytes of the calldata. Otherwise, it falls back to the default behavior.

Return Values

Name	Type	Description
sender	address	The address of the original transaction sender.

_msgData

function _msgData() internal view virtual returns (bytes)

_Overrides the msgData() function to support meta-transactions. If the message sender is a trusted forwarder, it returns the calldata excluding the last 20 bytes (which contain the original sender address). Otherwise, it falls back to the default behavior.

Return Values

Name	Type	Description
[0]	bytes	bytes calldata The original calldata, potentially truncated for meta-transactions.