Cross Chain Bridge
A cross-chain bridge is a protocol or set of smart contracts that enables the transfer of assets, data, or messages between two or more distinct blockchains that cannot natively communicate.
✦ Key Insight
Blockchains are otherwise siloed. Bridges unlock liquidity, allow traders to move capital to cheaper or higher-yield chains, and enable multi-chain strategies. However, they remain one of the largest sources of exploits in crypto.
✕ Common Misconceptions
Using unaudited or low-TVL bridges; ignoring withdrawal delays or finality differences; bridging large amounts without testing small transfers first; falling for phishing bridge front-ends.
Detailed Explanation
How It Works: Common models lock assets on the source chain and mint wrapped equivalents on the destination (lock-and-mint), or use liquidity pools and relayers. Security relies on validators, multisigs, light clients, or zero-knowledge proofs. Users pay fees on both sides.
FAQs:
Are all bridges equally safe?
No,official or highly audited ones are preferable.
Can assets get stuck?
Yes, during congestion or exploits.
Native vs wrapped?
Bridges often produce wrapped versions that must be redeemed later.