Chainlink CCIP API Reference Documentation

Available Versions

CCIP v1.5.1 (Current Version)
- Added support for tokens with different decimals across chains
- Enhanced token pool upgrades to support multiple active pools, ensuring in-flight messages remain deliverable during upgrades
- Added decimal validation and overflow protection
- Upgraded token pool access control from OwnerIsCreator to Ownable2StepMsgSender for better security
- Introduced BurnMintERC20 contract for easy token deployment and cross-chain expansion
  - Configurable decimals and max supply
  - Built-in CCIP admin support
  - Role-based access control for minting and burning

CCIP v1.5.0 (Legacy Version)
- Base implementation
- Cross-chain:
  - Send arbitrary data
  - Transfer tokens
  - Programmable Token Transfers
- Cross-Chain Token (CCT) standard
- ⚠️ We recommend upgrading to v1.5.1 for latest features

Each version includes detailed documentation for: