> ## Documentation Index
> Fetch the complete documentation index at: https://anypay-edge.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Composable Actions allow developers to easily specify multiple actions to take on a destination chain that can compose with multiple protocols.

Composable Actions allow developers to easily specify multiple actions to take on a destination chain that can compose with multiple protocols. For example, staking in a liquid staking token and then depositing that token into a vault. This means a user can sign a single transaction and multiple onchain interactions can take place from virtually any chain as the starting point.

Two browser integration styles are supported:

1. **Quote-first flow** — use [`useQuote`](/sdk/hooks#usequote-hook) with `actions` when you want to build your own UI and preview a quote before sending it.
2. **Send-transaction flow** — use `useTrailsSendTransaction` with `actions` when you want to trigger the Trails Widget.

Token amounts passed to `useQuote` and `useTrailsSendTransaction` are human-readable decimal strings, so `"0.2"` means 0.2 USDC / USDT / ETH depending on the selected token.

## What Composable Actions are

A Trails **intent** is a two-phase transaction:

```mermaid theme={null}
flowchart LR
    User["User's funds<br/>(origin chain)"]
    Wallet["Intent wallet<br/>(destination chain)"]
    Calls["Destination calls"]

    User -->|bridge / swap| Wallet
    Wallet --> Calls
```

1. The user signs **once** on the origin chain. Their funds are bridged and/or swapped to an **intent wallet** on the destination chain.
2. Trails then runs the **destination calls** from that intent wallet.

Composable Actions are a typed builder for those destination calls. Each builder returns a plain action descriptor, an array of them is what you hand to `useQuote` or `useTrailsSendTransaction`.

## Available action builders

Import the builders you need directly from `0xtrails`:

```ts theme={null}
import { swap, lend, deposit, assertCondition, custom } from '0xtrails'
```

| Builder                  | What it does                                                                        |
| ------------------------ | ----------------------------------------------------------------------------------- |
| `swap({...})`            | On-chain swap via Uniswap V3 or SushiSwap V3                                        |
| `lend({...})`            | Supply into supported lending markets such as Aave                                  |
| `deposit({...})`         | Deposit into an ERC-4626 / vault-style market (Morpho, Yearn, SummerFi, Sky, …)     |
| `assertCondition({...})` | On-chain guard (`balance >= X`, `deadline > now`, …) — whole batch reverts if false |
| `custom({...})`          | Wrap an arbitrary contract call (escape hatch)                                      |

See [Building Actions](/sdk/composable-actions/building-actions) for the full API of each builder.

## Demo

Try composable actions in the [SDK sandbox](https://demo.trails.build/sdk-sandbox/composable-actions).

## Where to go next

* [Quickstart](/sdk/composable-actions/quickstart) — a multi-step example combining `deposit`, `swap`, `assertCondition`, and `lend` in a single intent.
* [Building Actions](/sdk/composable-actions/building-actions) — the full builder API, one section per builder.
* [Dynamic Values](/sdk/composable-actions/dynamic-values) — `dynamic()` and `self()` for runtime amount / address resolution.
* [Markets & Providers](/sdk/composable-actions/markets-and-providers) — discover markets and providers.
* [ERC-20 Helpers](/sdk/composable-actions/erc20-helpers) — token registry, calldata builders, slippage helper.
* [Supported Chains](/sdk/composable-actions/supported-chains) — chain identifiers and swap provider coverage.