Ethereum ERC-20 FOUR to Solana SPL FOUR token Bridge Manual
The Solana Wormhole bridge enables ERC-20 FOUR to bridge to SPL FOUR available on the Solana blockchain. The Wormhole bridge uses decentralized cross-chain oracles (i.e. guardians) operated by a set of node operators that include top Solana validators and other ecosystem stakeholders whose incentives are strongly aligned with Solana and Serum (Solana.com, May 2021).
The Wormhole is a bidirectional decentralised ERC-20 / SPL token cross-chain bridge that enables existing assets such as FOUR to be moved seamlessly between Ethereum and Solana blockchain. According to Solana.com, the Wormhole is not a blockchain network, it uses the consensus of both chains it bridges, while guardians perform computation upon observing the on-chain events and sign Validator Action Approval resulting in mint or burn process. The Bridge enables the cross-chain token bridging in both directions. The smart contract locks the ERC-20 FOUR sent from the Ethereum, while the equivalent amount of FOUR SPL is minted on Solana. When the SPL FOUR needs to be bridged back to ERC-20 FOUR, the smart contract puts in an SPL FOUR burn request to the Bridge, and the ERC-20 FOUR are released from the reserves. This process ensures that the total and circulating token supply doesn’t change.