Introduction
USDC is a fully-reserved stablecoin pegged 1:1 to the US dollar, widely used across multiple blockchains. Circle's Cross-Chain Transfer Protocol (CCTP) enables native USDC transfers between chains by burning tokens on the source chain and minting equivalent amounts on the destination chain.
After searching for a while without finding a suitable testnet bridging tool, I built one myself. This tool allows you to bridge USDC between Ethereum Sepolia and Solana Devnet for testing purposes.
TRY IT OUT AT USDC BRIDGE (https://cctp-bridged.vercel.app/)
Bridge interface showing USDC transfer from ETH Sepolia to Solana Devnet
Technical Details
The Cross-Chain Transfer Protocol (CCTP) is a permissionless protocol for transferring
native USDC across supported blockchains. It works by burning USDC on the source chain and
minting an equivalent amount on the destination chain, enabling seamless and secure value
transfer. For more information, see Circle's official CCTP documentation.
This tool is built using only official CCTP dependencies—no additional smart contracts or
centralized services required. The entire bridging process relies on Circle's
battle-tested infrastructure.
The bridging process between ETH and Solana (and vice versa) involves three steps:
- Burn USDC on the source chain using the TokenMessengerV2 contract
- Fetch attestation proof of the burn from Circle's Iris Attestation Service
- Mint USDC on the destination chain using the MessageTransmitterV2 contract
The complete source code is available on GitHub. You can download it and run it locally on your machine. Contributions via pull requests
are welcome!