<!--
Sitemap:
- [Interop SDK Documentation](/index): Build multichain TypeScript apps with interoperable addresses, cross-chain quotes, transfer execution, and order tracking across providers.
- [Install Interop SDK](/installation): Install @wonderland/interop-addresses and @wonderland/interop-cross-chain, then choose the package that fits your multichain app.
- [Addresses Module](/addresses/): Parse, encode, and resolve chain-aware addresses that combine an account, chain, and optional ENS name into one unambiguous identifier.
- [Addresses: Getting Started](/addresses/getting-started): Parse an interoperable address and extract its components — go from a human-readable name like vitalik.eth@eip155:1 to address and chain ID.
- [Addresses: Concepts](/addresses/concepts): How EIP-7930, ERC-7828, and CAIP-350 combine address and chain into a single, unambiguous, validated identifier for multichain apps.
- [Parsing an Interoperable Name](/addresses/example): Walkthrough for wallet developers — extract the raw address and chain ID from an interop address so legacy contracts keep working.
- [Addresses: Advanced Usage](/addresses/advanced-usage): Advanced patterns for interoperable addresses — checksums, validation, error handling, and round-trip conversions between formats.
- [Addresses: API Reference](/addresses/api): Function signatures and types for the interop-addresses package — high-level helpers, name-layer methods, and binary-layer primitives.
- [Cross-Chain Module](/cross-chain/): One open source integration for cross-chain actions — compare quotes across providers, execute orders, and track completion.
- [Cross-Chain: Getting Started](/cross-chain/getting-started): Execute a cross-chain token transfer end-to-end — create a provider, fetch a quote, send the transaction, and track the order to completion.
- [Cross-Chain: Concepts](/cross-chain/concepts): The intent-based architecture behind the cross-chain package and how the SDK unifies heterogeneous bridge providers behind a common interface.
- [Supported Providers](/cross-chain/providers): Supported cross-chain providers (Across, Relay, OIF, Bungee, LiFi Intents) and how to configure each via createCrossChainProvider.
- [Across Provider](/cross-chain/across-provider): Configure and use the Across Protocol provider for cross-chain token transfers via the Across bridge infrastructure.
- [Relay Provider](/cross-chain/relay-provider): Configure and use the Relay Protocol provider for cross-chain transfers, including opt-in gasless execution via EIP-3009 signatures.
- [OIF Provider](/cross-chain/oif-provider): Direct integration with any OIF-compliant solver — submission modes, resource locks, and configuration for Open Intents Framework backends.
- [Bungee Provider](/cross-chain/bungee-provider): Cross-chain token transfers via Bungee — onchain transactions, gasless permit2 flow, and tier-based API access for sandbox or production.
- [LiFi Intents Provider](/cross-chain/lifi-intents-provider): Cross-chain transfers through the LI.FI intent solver marketplace, where competing solvers fulfill deposits at the best available rate.
- [Cross-Chain: Full Example](/cross-chain/example): End-to-end example of executing a cross-chain transfer — setup, quote, approval handling, transaction submission, and order tracking.
- [Cross-Chain: Frontend Integration](/cross-chain/frontend-integration): Wire the cross-chain SDK into a React/Next.js app with wagmi v2 — a useCrossChainSwap hook covering quotes, approvals, and submission.
- [Order Tracking](/cross-chain/order-tracking): Track cross-chain orders from initiation to completion via OIF OrderStatus events, with both onchain and offchain observation strategies.
- [Cross-Chain: Advanced Usage](/cross-chain/advanced-usage): Aggregator patterns for cross-chain transfers — multi-provider quote fetching, sorting strategies, timeouts, and built-in order tracking.
- [Cross-Chain: API Reference](/cross-chain/api): Function signatures and types for the interop-cross-chain package — providers, aggregator, approval service, and order tracking.
-->

# Cross-Chain Module

**An open source toolkit for cross-chain value movement, aggregating intent protocols via a developer-friendly interface.**

Easy to use, open source and maximally configurable, the `cross-chain` package connects your application to multiple providers via a single integration.

Simplify cross-chain payments and DeFi actions while comparing providers to find the best balance of price, latency and trust for your users.

Developed by Wonderland in collaboration with the [Ethereum Foundation](https://ethereum.foundation/), the `cross-chain` package builds on open standards like the [Open Intents Framework](https://openintents.xyz/) and [ERC-7683](https://eips.ethereum.org/EIPS/eip-7683), while also integrating other intent protocols in an open source client-side library.

## What it does

* Fetch and compare quotes from multiple providers (Across, Relay, OIF, Bungee, LiFi Intents)
* Execute cross-chain actions via gasless signatures or onchain transactions
* Generate approvals as required for easy onchain execution
* Track orders from initiation to completion

:::warning\[Experimental release — not for production use]

This SDK is an early, preview release and has not been audited. It handles transaction and signature data for cross-chain value transfers, so a defect in the SDK could result in permanent, irrecoverable loss of user funds.

Do not use this SDK in production or with real user value.
:::

## Where to start

| I want to...                 | Go to                                                                                                                                                                                                      |
| ---------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Try it out                   | [Getting Started](/cross-chain/getting-started)                                                                                                                                                            |
| Build a frontend             | [Frontend Integration](/cross-chain/frontend-integration)                                                                                                                                                  |
| Understand the design        | [Concepts](/cross-chain/concepts)                                                                                                                                                                          |
| See the transfer flow        | [Concepts → The transfer flow](/cross-chain/concepts#the-transfer-flow)                                                                                                                                    |
| Set up a specific provider   | [Across](/cross-chain/across-provider), [Relay](/cross-chain/relay-provider), [OIF](/cross-chain/oif-provider), [Bungee](/cross-chain/bungee-provider), [LiFi Intents](/cross-chain/lifi-intents-provider) |
| Monitor a transfer           | [Order Tracking](/cross-chain/order-tracking)                                                                                                                                                              |
| Learn advanced patterns      | [Advanced Usage](/cross-chain/advanced-usage)                                                                                                                                                              |
| Look up a function signature | [API Reference](/cross-chain/api)                                                                                                                                                                          |