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The Chainlink Cross-Chain Interoperability Protocol (CCIP) is a standard for blockchain interoperability that enables developers to build secure cross-chain applications capable of transferring tokens, sending messages, and executing actions across multiple blockchains. Through the Cross-Chain Token (CCT) standard, CCIP allows token developers to integrate new or existing tokens in a self-serve way, without vendor lock-in or restrictive dependencies. CCTs support:
  • Self-serve deployments with full control and ownership
  • Zero-slippage transfers across supported chains
  • Enhanced programmability via configurable rate limits
  • Smart Execution for reliable cross-chain delivery
CCIP is powered by Chainlink Decentralized Oracle Networks (DONs).

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CCIP Availability on Hedera

CCIP is live on both Hedera Mainnet and Hedera Testnet. On Hedera Mainnet, CCIP lanes connect Hedera to chains including Ethereum, Arbitrum, Base, Optimism, Avalanche, Polygon, and Solana. On Hedera Testnet, lanes connect to the matching test networks, such as Ethereum Sepolia.
The Chainlink CCIP Directory is the source of truth for supported lanes, supported tokens, rate limits, and contract addresses. Lanes and tokens are added over time, so check the directory before you deploy.

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Overview of CCIP and HTS Compatibility

On Hedera, CCIP extends interoperability between Hedera and other blockchains such as Ethereum. It works with both the Hedera Token Service (HTS) and standard EVM tokens (ERC-20 and ERC-721), enabling developers to move tokens, data, and logic across ecosystems. With CCIP, developers can:
  • Send and receive arbitrary messages between chains
  • Execute programmable cross-chain logic via Chainlink’s oracle network
  • Transfer tokens across chains using the Cross-Chain Token (CCT) standard
  • Pay fees on Hedera with LINK or Wrapped HBAR (WHBAR)

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Getting Started with CCIP on Hedera

To explore CCIP functionality, start with the Hedera CCIP Demo Repository, which showcases bi-directional cross-chain messaging between Hedera Testnet and Ethereum Sepolia using the Chainlink CCIP JavaScript SDK.
The demos run on testnet so you can try CCIP without spending mainnet funds. To move to production, swap in the Hedera Mainnet router, chain selector, and fee token addresses from the Network Configuration section below.

➡ DEMO REPO

Explore Chainlink CCIP cross-chain message passing between Hedera and Ethereum Sepolia.

➡ CCIP SDK

Learn how to integrate CCIP in your JavaScript dApps.

➡ TOKEN MANAGER

Deploy and manage Cross-Chain Tokens (CCTs) with a no-code interface.

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Setup

  1. Install dependencies
  2. Configure your environment
    Add your Hedera Testnet private key:
  3. Run a demo

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Available Demos

Wrap HBAR before running the WHBAR examples:
The demos are for educational purposes only. They are not audited and should not be used in production.

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Network Configuration

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Hedera Mainnet

Add Hedera Mainnet

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Hedera Testnet

Add Hedera Testnet

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Ethereum Sepolia

Add Ethereum Sepolia

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Fee Token Addresses

The CCIP WHBAR contract has the same EVM address on Hedera Mainnet and Hedera Testnet. WHBAR uses 8 decimals, while most EVM tokens use 18 decimals.

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Developer Considerations

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Decimal Precision

HBAR’s smallest unit is the tinybar (8 decimals). Since CCIP on EVM networks operates with 18-decimal precision, conversions between tinybars and wei-based values may be required. See Understanding Hedera’s EVM Differences and Compatibility.

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Cross-Chain Fees

Make sure your wallet holds enough of a supported fee token on the source chain to cover CCIP fees. On Hedera, that is LINK or WHBAR. The demos pay fees from Ethereum Sepolia in ETH.

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Message Timing

Cross-chain message delivery can take several minutes while the Chainlink oracle network waits for source-chain finality and executes the message on the destination chain.

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Test Tokens and Faucets

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Additional Resources

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Summary

Chainlink CCIP is a standard for secure, decentralized cross-chain interoperability, and it is live on Hedera Mainnet and Hedera Testnet. It connects Hedera to a broader multi-chain ecosystem, letting assets, logic, and state move across blockchains through a single protocol. On Hedera, CCIP supports HTS and EVM tokens under the CCT standard. It complements other interoperability solutions such as LayerZero and Hashport.