Send Your First Cross-Chain Message

With all the infrastructure in place, let's send your first cross-chain message!

End-to-End Message Flow

Here's what happens when you send a message:

┌──────────────┐    ┌────────────────────┐    ┌──────────────────┐
│  Demo Sender │───►│ TeleporterMessenger │───►│  AWM Precompile  │
│  (Your L1)   │    │    (Your L1)       │    │  (Warp Log)      │
└──────────────┘    └────────────────────┘    └──────────────────┘
                                                       │
                                                       ▼
                                              ┌──────────────────┐
                                              │     Relayer      │
                                              │ (Aggregates BLS  │
                                              │   Signatures)    │
                                              └──────────────────┘
                                                       │
                                                       ▼
┌──────────────┐    ┌────────────────────┐    ┌──────────────────┐
│ Demo Receiver│◄───│ TeleporterMessenger │◄───│  AWM Precompile  │
│  (C-Chain)   │    │    (C-Chain)       │    │  (Verification)  │
└──────────────┘    └────────────────────┘    └──────────────────┘

1. You call the demo sender with a string message
2. The sender encodes the message and calls sendCrossChainMessage on TeleporterMessenger
3. TeleporterMessenger creates a warp log via the AWM precompile
4. The relayer detects the message, queries validators for BLS signatures
5. The relayer delivers the signed message to TeleporterMessenger on the destination chain
6. TeleporterMessenger verifies the signatures and calls receiveTeleporterMessage on the demo receiver
7. The receiver decodes and stores the message

This is the same flow described in the Avalanche Warp Messaging section — now you're seeing it in action!

Send a Message

Use the tool below to send a cross-chain message between your L1 and Fuji C-Chain:

Congratulations!

You've successfully sent your first cross-chain message using Interchain Messaging! Your ICM infrastructure is fully operational.

What you've accomplished:

• Deployed TeleporterMessenger and TeleporterRegistry on your L1
• Set up a relayer between Fuji C-Chain and your L1
• Sent and verified a cross-chain message

What's next:

• Dive deeper into relayer configuration and economics in the next section
• Explore practical applications with the ERC-20 Bridge and Native Token Bridge courses