Create a airdrop address list verification process

[javier123454321]

I think that the way that ENS domains did it makes sense

How we compute the input amount of chain and place it in the proof is done this way:
bytes32 leaf = keccak256(abi.encodePacked(msg.sender, amount));
the leaf is the amount + the sender in a hashed keypair.

The merkle tree is computed off chain and only the proof is cerified on chain. This seems the most secure way to do on-chain proof.

They have a merkleproof library contract:
https://etherscan.io/address/0xc18360217d8f7ab5e7c516566761ea12ce7f9d72#code#F16#L1