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To send messages through CCIP, users must interact with the IRouterClient interface.
After you import IRouterClient.sol, you can initialize a router client instance:
import { IRouterClient} from "@chainlink/contracts-ccip/src/v0.8/ccip/interfaces/IRouterClient.sol" ;
. . .
IRouterClient router;
constructor ( address _router) {
router = IRouterClient ( _router) ;
} error UnsupportedDestinationChain ( uint64 destChainSelector) error InsufficientFeeTokenAmount ( ) error InvalidMsgValue ( ) function isChainSupported ( uint64 chainSelector) external view returns ( bool supported) Checks if the given chain ID is supported for sending/receiving.
Name Type Description chainSelector uint64 The chain to check.
Name Type Description supported bool is true if supported or false if not.
function getSupportedTokens ( uint64 chainSelector) external view returns ( address [ ] tokens) Gets a list of all supported tokens which can be sent or received
to or from a given chain ID.
Name Type Description chainSelector uint64 The chainSelector.
Name Type Description tokens address[] The addresses of all supported tokens.
function getFee ( uint64 destinationChainSelector, struct Client . EVM2AnyMessage message) external view returns ( uint256 fee) returns 0 fees on invalid message.
Name Type Description destinationChainSelector uint64 The destination chainSelector message struct Client.EVM2AnyMessage The cross-chain CCIP message, including data and/or tokens
Name Type Description fee uint256 returns guaranteed execution fee for the specified message delivery to the destination chain
function ccipSend ( uint64 destinationChainSelector, struct Client . EVM2AnyMessage message) external payable returns ( bytes32 ) Request a message to be sent to the destination chain.
Name Type Description destinationChainSelector uint64 The destination chain ID message struct Client.EVM2AnyMessage The cross-chain CCIP message, including data and/or tokens
Name Type Description [0] bytes32 messageId The message ID
