Definition
A bridge provides a mechanism for interaction between blockchain networks. It may support asset transfers, general messages or both. Because the networks maintain separate records, a bridge must specify how one side recognizes an event that occurred on the other.
How It Works
In a common asset design, tokens are locked on the source chain and a corresponding representation is issued on the destination. Other bridges burn and mint assets or use liquidity pools. Verification can depend on contracts, light clients, external validator groups or custodians. These differences affect who can approve transfers and what happens if part of the system fails.
Key Considerations
Bridging adds dependencies beyond simply holding an asset on its native chain. Contract flaws, compromised signers, incorrect messages or liquidity shortages can prevent redemption or cause losses. A bridged token with a familiar symbol may not be the issuer’s native deployment. Users should verify the exact route, asset contract, destination network and withdrawal conditions. A bridge should never be assumed trustless or secure solely because it uses blockchain technology.