# External

- [Fees](/contracts/technical-reference/external/fees.md)
- [Interfaces](/contracts/technical-reference/external/fees/interfaces.md)
- [IFeeManager\_v1.sol](/contracts/technical-reference/external/fees/interfaces/ifeemanager_v1.sol.md)
- [FeeManager\_v1.sol](/contracts/technical-reference/external/fees/feemanager_v1.sol.md)
- [Forwarder](/contracts/technical-reference/external/forwarder.md)
- [Interfaces](/contracts/technical-reference/external/forwarder/interfaces.md)
- [ITransactionForwarder\_v1.sol](/contracts/technical-reference/external/forwarder/interfaces/itransactionforwarder_v1.sol.md)
- [TransactionForwarder\_v1](/contracts/technical-reference/external/forwarder/transactionforwarder_v1.md)
- [Governance](/contracts/technical-reference/external/governance.md)
- [Interfaces](/contracts/technical-reference/external/governance/interfaces.md)
- [IGovernor\_v1.sol](/contracts/technical-reference/external/governance/interfaces/igovernor_v1.sol.md)
- [Governor\_v1.sol](/contracts/technical-reference/external/governance/governor_v1.sol.md)
- [Reverter](/contracts/technical-reference/external/reverter.md)
- [InverterReverter\_v1.sol](/contracts/technical-reference/external/reverter/inverterreverter_v1.sol.md)
- [ERC20Issuance](/contracts/technical-reference/external/erc20issuance.md)
- [Interfaces](/contracts/technical-reference/external/erc20issuance/interfaces.md)
- [IERC20Issuance\_v1.sol](/contracts/technical-reference/external/erc20issuance/interfaces/ierc20issuance_v1.sol.md)
- [ERC20Issuance\_v1.sol](/contracts/technical-reference/external/erc20issuance/erc20issuance_v1.sol.md)
- [Interfaces](/contracts/technical-reference/external/interfaces.md)
- [IERC2771Context.sol](/contracts/technical-reference/external/interfaces/ierc2771context.sol.md)