> For the complete documentation index, see [llms.txt](https://docs.stormbit.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stormbit.finance/developers/building-hooks.md).

# Building Hooks

Hooks add custom logic at protocol events.

```solidity
interface IHooks {
    // Term events
    function beforeTermInitialize(address caller, TermKey memory termKey, bytes calldata hookData) external;
    function afterTermInitialize(address caller, TermKey memory termKey, bytes calldata hookData) external;
    function beforeTermModifyPosition(address caller, TermKey memory termKey, TermModifyPositionParams memory params, bytes calldata hookData) external;
    function afterTermModifyPosition(address caller, TermKey memory termKey, TermModifyPositionParams memory params, bytes calldata hookData) external;
    function beforeTermSettle(address caller, TermKey memory termKey, TermSettleParams memory params, bytes calldata hookData) external;
    function afterTermSettle(address caller, TermKey memory termKey, TermSettleParams memory params, bytes calldata hookData) external;

    // Loan events
    function beforeAllocate(address caller, TermKey memory termKey, LoanKey memory loanKey, AllocateParams memory params, bytes calldata hookData) external;
    function afterAllocate(address caller, TermKey memory termKey, LoanKey memory loanKey, AllocateParams memory params, bytes calldata hookData) external;
    function beforeRepay(address caller, TermKey memory termKey, LoanKey memory loanKey, RepayParams memory params, bytes calldata hookData) external;
    function afterRepay(address caller, TermKey memory termKey, LoanKey memory loanKey, RepayParams memory params, bytes calldata hookData) external;
}
```

***

**Access Control** — Whitelist addresses, require KYC

**Protocol Integration** — Connect to Aave, Compound, etc.

**Custom Logic** — Rate limiting, timelocks, custom fees

***

**Built-in hooks:** P2P (manual loan approval), AaveV3 (idle capital optimization), Timelock (delayed execution)

***

* Implement the interface above
* All functions are optional
* Reverting blocks the operation
* Reference deployed contracts for implementation details


---

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