Merkle Trees for Smart Contracts in 1 Minute

How to create and use Merkle Trees in Solidity.

A Merkle Tree is a tree in which every node is labeled with a hash, and every branch is hashed with the contents of its child nodes. The topmost node is called the root and the bottom-most nodes are called the leaves. The leaves are the initial data that is hashed.

This requires two pieces of code. Serverside code to create a proof , and code in Solidity for the smart contract. We need to hash the input (address) and create a proof with it.

We can use that proof as call data to the smart contract so that the smart contract can verify its validity on-chain.

Remember to save the root of the created tree in the smart contract.

Thank you for reading this quick article and have a wonderful day.

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