# Contract Interfaces

> Map of the composer contract API — entry point, operation encoding and every supported operation family.

Source: https://docs.1delta.io/smart-contract-api/summary/

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The following subsections describe the smart contract api for both the brokerage/aggregation contract.

-   [Entrypoint](entrypoint.md)
-   [Operations](operations.md)
    -   [Transfers](transfers.md)
    -   [External Call](external-call.md)
        -   [Bridging](./bridge/bridge.md)
            -   [Stargate V2](./bridge/stargate.md)
            -   [Across](./bridge/across.md)
    -   [Lending](lending.md)
        -   [Aave](./lending/aave.md)
        -   [Compound V3](./lending/compound-v3.md)
        -   [Compound V2](./lending/compound-v2.md)
        -   [Morpho Blue](./lending/morpho.md)
    -   [Flash Loan](flash-loan.md)
        -   [Standardized Interface](./flash-loan/standardized-interface.md)
        -   [Singletons](./flash-loan/singletons.md)
    -   [Margin](./margin.md)

The deployed composers are immutable and externally audited — see
[Security & Audits](https://docs.1delta.io/security/) for the audit scope and findings, and
[Contract Addresses](https://docs.1delta.io/contract-addresses/) for the per-chain deployments.