Bridge (Blockchain Bridge)
Also known as: Cross-Chain Bridge, Blockchain Interoperability Protocol, Token Bridge
A protocol that enables the transfer of assets and data between two different blockchain networks.
A blockchain bridge is a protocol that connects two separate blockchain ecosystems, allowing users to transfer assets and data across them. By locking or burning tokens on one chain and minting equivalents on another, bridges enable interoperability between otherwise isolated networks. There are trust-based bridges that rely on centralized custodians, and trustless (or decentralized) bridges that use smart contracts and validators. Bridges are key to the multi-chain future, but they introduce security risks and complexities, as seen in high-profile bridge exploits.