Cross-Chain & Bridges: Connecting Blockchains

Learn why blockchains need to communicate with each other, how cross-chain bridges work, and the important security considerations you should understand.

5 lessons · 1 hr 39 min · advanced

1. 1Why Blockchains Need BridgesThe isolation problem of independent ledgers, the multichain reality of modern crypto, and why connecting chains is now critical infrastructure.12 min
2. 2How Cross-Chain Bridges WorkThe mechanics of lock-and-mint, burn-and-mint, atomic swaps, and the major messaging protocols (LayerZero, IBC, Chainlink CCIP) that move value across chains today.14 min
3. 3Bridge Security & RisksA history of major bridge exploits (Poly Network, Wormhole, Ronin, Harmony, Nomad, BSC Token Hub, Multichain, Orbit), the trust models behind them, and how to evaluate bridge safety.21 min
4. 4The Cross-Chain Future: LayerZero, CCIP, IBC, and the Interoperability StackA 2026 map of the full interoperability stack — LayerZero V2, Chainlink CCIP, Cosmos IBC, Circle CCTP, Wormhole, Across, Hop, Stargate, ZK light clients, and the Optimism Superchain — and how to navigate it as a user.27 min
5. 5Step-by-Step: Bridging USDC the Right WayA practical, hands-on walkthrough of bridging USDC and other assets across chains in 2026: CCTP V2 from Ethereum to Solana, canonical vs Across vs LayerZero from Ethereum to Arbitrum, the pre-bridge checklist, common failure modes, recovery procedures, real cost comparisons, and the limited tooling for USDT.25 min

Educational only — not financial advice.