Cross-Chain

Definitions

At a high level, bridges offer the following features:

Feature	Description
Arbitrary Messaging Bridge (AMB)	Allows arbitrary messages to be securely relayed from a smart contract on chain 1 to a smart contract on chain 2. AMB provides guarantees that messages delivered to chain 2 represent events finalized on chain 1.
Token Bridge	Allows user to lock native tokens or ERC20 tokens on chain 1 and mint claim tokens on chain 2. Bridge maintains the invariant that, for each token minted on chain 2, there exists a corresponding token locked on chain 1.

Provider Summary

The following providers support Monad Testnet:

Provider	Docs	Bridge Type	Contract Addresses	Explorer
Chainlink CCIP	Docs	AMB; Token Bridge	Router: 0x5f16e51e3Dcb255480F090157DD01bA962a53E54 Supported lanes can be found here	CCIP Explorer
Garden	Docs	Token Bridge	Wrapped Assets: cbBTC USDC
Hyperlane	Docs	AMB; Token Bridge	ISM Operator: 0x734628f55694d2a5f4de3e755ccb40ecd72b16d9	Hyperlane Explorer
LayerZero	Docs	AMB; Token Bridge	LayerZero V2 Address Reference Endpoint V2: 0x6C7Ab2202C98C4227C5c46f1417D81144DA716Ff Endpoint ID: 40204 SendUln302: 0xd682ECF100f6F4284138AA925348633B0611Ae21 ReceiveUln302: 0xcF1B0F4106B0324F96fEfcC31bA9498caa80701C BlockedMessageLib: 0x926984a57b10a3a5c4cfdbac04daaa0309e78932 LZ Executor: 0x9dB9Ca3305B48F196D18082e91cB64663b13d014 LZ Dead DVN: 0xF49d162484290EAeAd7bb8C2c7E3a6f8f52e32d6	LayerZeroScan
Wormhole	Docs	AMB; Token Bridge	Wormhole specific Chain ID: 48 Core Contract: 0xBB73cB66C26740F31d1FabDC6b7A46a038A300dd Token Bridge: 0xF323dcDe4d33efe83cf455F78F9F6cc656e6B659 Wormhole Relayer: 0x362fca37E45fe1096b42021b543f462D49a5C8df	WormholeScan

Provider Details

Chainlink CCIP

Chainlink Cross-Chain Interoperability Protocol (CCIP) is the standard for cross-chain interoperability. CCIP enables developers to build secure cross-chain apps that can transfer tokens, send messages, and initiate actions across blockchains.

Through the Cross-Chain Token (CCT) standard, CCIP enables token developers to integrate new and existing tokens with CCIP in a self-serve manner in minutes, without requiring vendor lock-in, hard-coded functions, or external dependencies that may limit future optionality. CCTs support self-serve deployments, full control and ownership for developers, zero-slippage transfers, and enhanced programmability via configurable rate limits and reliability features such as Smart Execution. CCIP is powered by Chainlink decentralized oracle networks (DONs)—a proven standard with a track record of securing tens of billions of dollars and enabling over $19 trillion in onchain transaction value.

Key CCIP developer tools:

• CCIP official documentation: start integrating CCIP into your cross-chain application.
• CCIP Token Manager: an intuitive front-end web interface for the deployment of new and management of existing CCTs by their developers, including no-code guided deployments and configuration tools.
• CCIP SDK: a software development kit that streamlines the process of integrating CCIP, allowing developers to use JavaScript to create a token transfer frontend dApp.

Contract Addresses for Monad Testnet:

• 0x5f16e51e3Dcb255480F090157DD01bA962a53E54

Supported Networks:

• Monad Testnet

Garden

Garden is transforming Bitcoin interoperability with its next-gen bridge. It is built by the renBTC team using an intents based architecture with trustless settlement, enabling cross-chain Bitcoin swaps in as little as 30 seconds with zero custody risk.

In its first year, Garden processed over $1 billion in volume—proving the market's demand for seamless, cost-effective Bitcoin bridging solutions.

Now, Garden is unlocking a new era of interoperability—supporting non-likewise assets, external liquidity, and a wallet-friendly API—to onboard the next wave of partners and users.

To get started, visit the documentation.

Supported Networks

• Monad Testnet

Hyperlane

Hyperlane is a permissionless interoperability protocol for cross-chain communication. It enables message passing and asset transfers across different chains without relying on centralized intermediaries or requiring any permissions.

To get started, visit the Hyperlane documentation.

Hyperlane Explorer

To view status of your cross chain transactions, please visit the Hyperlane Explorer.

Supported Networks:

• Monad Testnet

LayerZero

LayerZero is an omnichain interoperability protocol that enables cross-chain messaging. Applications built on Monad can use the LayerZero protocol to connect to 35+ supported blockchains seamlessly.

To get started with integrating LayerZero, visit the LayerZero documentation and provided examples on GitHub.

Supported Networks:

• Monad Testnet

Wormhole

Wormhole is a generic messaging protocol that provides secure communication between blockchains.

By integrating Wormhole, a Monad application can access users and liquidity on > 30 chains and > 7 different platforms.

See this quickstart to get started with integrating Wormhole in your Monad project.

For more information on integrating Wormhole, visit their documentation and the provided GitHub examples.

Contract Addresses for Monad Testnet:

• Core: 0xBB73cB66C26740F31d1FabDC6b7A46a038A300dd
• Relayer: 0x362fca37E45fe1096b42021b543f462D49a5C8df

Supported Networks:

• Monad Testnet