Solidity

Chainlink CCIP EVM Contracts: Architecture from Source Code

EVM chains are isolated by design. A contract on Arbitrum has no native way to call a contract on Base, and sending USDC from Ethereum Mainnet to Polygon is not a built-in operation. Cross-chain bridges filled that gap for years, but the category has seen repeated security incidents that highlight how wide the attack surface is.

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Circle CCTP V2 EVM Contracts: A Source-Code Walkthrough

Bridge designs for moving USDC between chains come down to two families. Lock-and-mint parks the original token in a contract on the source chain and issues a wrapped version on the destination. Burn-and-mint destroys the token on the source chain outright and issues the same amount fresh on the destination. Circle’s CCTP (Cross-Chain Transfer Protocol) is the second kind.

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