> For the complete documentation index, see [llms.txt](https://docs.opus.money/current/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.opus.money/current/technical-documentation/smart-contracts.md).

# Smart Contracts

- [Shrine Module](https://docs.opus.money/current/technical-documentation/smart-contracts/shrine-module.md): The core accounting engine
- [Abbot Module](https://docs.opus.money/current/technical-documentation/smart-contracts/abbot-module.md): The user interface of the Shrine
- [Archabbot Module](https://docs.opus.money/current/technical-documentation/smart-contracts/archabbot-module.md): An upgraded Abbot enabling automation and leverage
- [Topup Rite](https://docs.opus.money/current/technical-documentation/smart-contracts/archabbot-module/topup-rite.md)
- [Gate Module](https://docs.opus.money/current/technical-documentation/smart-contracts/gate-module.md): Adapters for collateral tokens
- [Sentinel Module](https://docs.opus.money/current/technical-documentation/smart-contracts/sentinel-module.md): Internal router and gatekeeper for Gates
- [Purger Module](https://docs.opus.money/current/technical-documentation/smart-contracts/purger-module.md): Liquidator of unhealthy troves
- [Absorber Module](https://docs.opus.money/current/technical-documentation/smart-contracts/absorber-module.md): Stability pool as the secondary layer of liquidations
- [Controller Module](https://docs.opus.money/current/technical-documentation/smart-contracts/controller-module.md): Autonomous interest rate governor
- [Equalizer Module](https://docs.opus.money/current/technical-documentation/smart-contracts/equalizer-module.md): The financial controller
- [Stabilizer Module](https://docs.opus.money/current/technical-documentation/smart-contracts/stabilizer-module.md): Enshrining incentivized liquidity
- [Seer Module](https://docs.opus.money/current/technical-documentation/smart-contracts/seer-module.md): The arbiter of collateral prices
- [Receptor Module](https://docs.opus.money/current/technical-documentation/smart-contracts/receptor-module.md): The controller's sensor
- [Flash Mint Module](https://docs.opus.money/current/technical-documentation/smart-contracts/flash-mint-module.md): EIP-3156 Flash Loans
- [Caretaker Module](https://docs.opus.money/current/technical-documentation/smart-contracts/caretaker-module.md): Global shutdown
- [Transmuter Module](https://docs.opus.money/current/technical-documentation/smart-contracts/transmuter-module.md): Direct minting of yin with equivalent assets