Cross Chain

Cross-chain refers to communication between different blockchain protocols

Established protocols like IBC, CCIP & Wormhole aim to provide standards to enabling bridging communications between different chains

IBC

IBC (Inter-Blockchain Communication) is one such protocol

Token Transfer

• ICS-20: Transfer of fungible tokens over an IBC channel between two modules on separate chains

CCPI

Token Minting

• How to Mint a Cross-Chain NFT (ERC-721) using Chainlink’s CCIP
• How to Mint an NFT Across Different Blockchains using Chainlink CCIP
• 4 contracts are responsible for the process:

  MyNFT.sol:	ERC-721 token contract deployed on destination chain
  DestionationMinter.sol:	Receives & executes cross-chain minting requests for NFTs, deployed on the destination chain
  SourceMinter.sol:	Allows users to initiate the minting process on a destination chain by sending a CCIP message; also handles fees either in native tokens or Chainlink’s LINK token; deployed on the source chain
  Withdraw.sol:	Provides functions for withdrawing ETH and ERC-20 tokens from SourceMinter.sol.