How Cross-Chain Bridges Move Assets Between Blockchains
Cross-chain bridges have become one of the most important pieces of DeFi infrastructure. They let a token minted on one network move to another without a centralized exchange in the middle. If you want a deeper primer, this bridge overview walks through the mechanics.
Why bridges exist
Every blockchain is an island. Ethereum cannot natively read Solana state, and Polygon cannot see what happens on Arbitrum. A bridge builds a trusted (or trust-minimized) channel so value can cross that gap.
- Lock-and-mint — assets are locked on the source chain and a wrapped version is minted on the destination.
- Liquidity pools — the bridge holds reserves on both sides and swaps against them.
- Message passing — general data, not just tokens, is relayed between chains.
What to check before bridging
Fees, settlement time, and the security model matter more than raw speed. A bridge that settles in seconds but relies on a single multisig is riskier than a slower, validator-secured route.
The safest bridge is the one whose failure mode you actually understand.
For a side-by-side of current options, see this comparison and always test with a small amount first.
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