Chainlink CCIP API Reference Documentation (EVM)

Available Versions

CCIP v1.6.1 (Current Version)
- Pool Library: ReleaseOrMintInV1.amount renamed to sourceDenominatedAmount
- TokenPool events: Locked/Burned and Released/Minted replaced by unified LockedOrBurned and ReleasedOrMinted
- Rate limiting: added OutboundRateLimitConsumed and InboundRateLimitConsumed events for monitoring consumption
- LockReleaseTokenPool constructor: removed acceptLiquidity parameter; canAcceptLiquidity capability removed
- LockReleaseTokenPool: removed lockOrBurn and releaseOrMint functions
- LockReleaseTokenPool: added RebalancerSet event
- Extensibility: standardized pool extension hooks via internal _lockOrBurn and _releaseOrMint in TokenPool
CCIP v1.6.0
- Added support for SVM (Solana Virtual Machine) chains
CCIP v1.5.1
- 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: