MCPInstall

ccip

by hedera-dev

Chainlink CCIP Cross-Chain Tokens on Hedera. Use when bridging burn-and-mint CCT between Hedera and EVM, registering TokenAdminRegistry / pools, calling ccipSend with chain selectors, or wiring HTS-backed wrappers (HtsBurnMintERC20) vs vanilla BurnMintERC20. Not for Chainlink Data Feeds / price oracles.

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Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/hedera-dev/hedera-skills --skill ccip
  1. 01

    Install

    Run the command in your project. The CLI asks which agents to install for.

  2. 02

    Describe the task

    Ask your agent for something this skill covers. It loads ccip automatically when relevant.

  3. 03

    Review the result

    The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Chainlink CCIP (Hedera)

CCT burn-and-mint pattern: deploy a burn-mint token + token pool on each chain, register the token with CCIP, wire remote pools with chain selectors, then ccipSend paying native fees.

BurnMint token + TokenPool (source)
        → Router.ccipSend(destSelector, message)
             → TokenPool lockOrBurn / releaseOrMint (dest)

On Hedera you can use a vanilla ERC-20 CCT or an HTS-backed wrapper. CCIP always registers the ERC-20 the pool sees — for HTS that is the wrapper, while users hold the native HTS token.

This skill is cross-chain tokens/messages, not Chainlink Data Feeds.

Quick Reference

PieceRole
RoutergetFee + ccipSend{value}
Chain selectoruint64 CCIP id — not EVM chain ID
Token + poolBurn-mint ERC-20 + BurnMintTokenPool (or Hedera HTS variants)
Admin registryRegistryModuleOwnerCustom → TokenAdminRegistry.acceptAdminRole → setPool
Lane configTokenPool.applyChainUpdates both directions
FeeNative gas (feeToken = address(0)); attach msg.value
Receiverabi.encode(address) in EVM2AnyMessage.receiver

See references/hedera-ccip.md for where to source selectors and registry addresses. See references/examples.md for register / wire / send sketches.

Critical: Selectors, Not Chain IDs

ccipSend and pool remoteChainSelector take CCIP chain selectors. Hedera testnet (296) and Sepolia (11155111) have different selector values than their EVM chain IDs. Look them up in the CCIP directory; do not pass 296 as a selector.

Do not reuse Axelar GMP names or LayerZero EIDs here.

Critical: Register Then Wire Both Lanes

Incomplete registry/pool config bricks the token. Per chain:

  1. Deploy token + pool
  2. Grant the pool mint/burn roles on the token
  3. registerAdminViaGetCCIPAdmin(token) then acceptAdminRole(token)
  4. TokenAdminRegistry.setPool(token, pool)
  5. After both chains have token+pool addresses: applyChainUpdates on each pool (remote selector, remote pool, remote token)

Then send a small test amount and track it on CCIP Explorer.

Critical: Hedera HTS-Backed CCT

Vanilla path: BurnMintERC20 + BurnMintTokenPool on Hedera EVM, same as Sepolia.

HTS-backed path:

  • Users hold a native HTS token created via precompile 0x167
  • CCIP registers the wrapper (HtsBurnMintERC20), not the HTS token id/address users see in wallets
  • Pool (HtsBurnMintTokenPool) must associate itself with the native HTS token and approve the wrapper
  • Hedera → remote send needs two approvals: HTS → wrapper, wrapper → Router
  • Receiver accounts must associate the native HTS token before inbound mints
  • Mint/burn/transfer amounts must fit HTS int64

Do not mix Axelar or LayerZero token addresses into CCIP env/config.

Send Flow (native fee)

Client.EVM2AnyMessage memory message = Client.EVM2AnyMessage({
    receiver: abi.encode(receiver),
    data: "",
    tokenAmounts: tokenAmounts, // token is the CCIP-registered ERC-20 / wrapper
    feeToken: address(0),
    extraArgs: Client._argsToBytes(
        Client.EVMExtraArgsV2({ gasLimit: 0, allowOutOfOrderExecution: true })
    )
});

uint256 fee = IRouterClient(router).getFee(destinationChainSelector, message);
IERC20(tokenToSend).approve(router, amount);
IRouterClient(router).ccipSend{ value: fee }(destinationChainSelector, message);

Checklist

  • Chain selectors from the CCIP directory (not EVM chain IDs, Axelar names, or LZ EIDs)
  • Token admin registered and pool set on both chains
  • applyChainUpdates wired both directions before sending
  • Native fee attached to ccipSend (feeToken = address(0))
  • HTS path: wrapper registered with CCIP; users hold native HTS; dual approve + associate
  • Amounts fit int64 when touching HTS mint/burn
  • CCIP token/pool addresses not copied from Axelar/LayerZero configs

References

FAQ

What does the ccip skill do?

Chainlink CCIP Cross-Chain Tokens on Hedera. Use when bridging burn-and-mint CCT between Hedera and EVM, registering TokenAdminRegistry / pools, calling ccipSend with chain selectors, or wiring HTS-backed wrappers (HtsBurnMintERC20) vs vanilla BurnMintERC20. Not for Chainlink Data Feeds / price oracles.

How do I install ccip?

Run npx skills add https://github.com/hedera-dev/hedera-skills --skill ccip in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/ccip/ (personal) or .claude/skills/ccip/ (project).

Which AI agents can use ccip?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is ccip safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains ccip?

It is published by hedera-dev in hedera-dev/hedera-skills. It has 457 recorded installs.

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