lesson·30 min·Chapter 1 of 3
Inter-Blockchain Communication
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Upgrade to ProThe Cosmos ecosystem pioneered cross-chain communication with IBC (Inter-Blockchain Communication). IBC enables sovereign blockchains (built with Cosmos SDK) to transfer tokens and data through a standardized protocol. It works via light client verification: each chain runs a light client of the other chain, verifying block headers and Merkle proofs. Relayers (permissionless off-chain agents) transmit packets between chains. IBC has enabled a thriving ecosystem of interconnected chains including Osmosis, Celestia, and dYdX.
💡 Key Takeaway
This lesson covers the fundamental concepts. Make sure you understand these before moving to the next chapter.