Blockchains are typically designed to operate as discrete systems where validators are responsible for securing it and ensuring consensus on that chain alone. Bridges are software protocols that allow these systems to communicate with each other and to connect two otherwise unconnected blockchain platforms.

They allow users to send assets, messages, or data from one blockchain to another without compromising the integrity of the overall token supply or interrupting blockchain consensus. Bridges emerged as a solution to the problem of blockchain interoperability, eliminating constraints on the transfer of assets and information between chains.

Also known as a cross-chain bridge, examples include Wormhole, which bridges Solana and Ethereum, and the Polygon Bridge, which bridges Polygon and Ethereum.

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