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How Is the Merkle Tree Used in Side-Chain Technology?

Side-chains use Merkle Trees to prove the state of the main chain or the transfer of assets between chains. A Merkle Proof can be used to prove to the side-chain that a specific event (like a lock-up of assets) occurred on the main chain.

This is vital for two-way peg mechanisms, ensuring the integrity of cross-chain asset movement.

How Is a “Sidechain” Different from the Main Blockchain?
How Is the Merkle Tree Structure Used to Verify Transactions Efficiently?
Can SPV Be Used to Verify the State of a Smart Contract?
Can a Merkle Proof Be Used to Verify the Integrity of an Options Contract Data Feed?