from hashlib import sha256

leaves = [sha256(f"{wallet}_{6000}".encode()).digest() for wallet in wallets[:1000]]
while len(leaves) > 1:
    leaves = [sha256(leaves[i] + leaves[i+1]) if i+1 < len(leaves) else leaves[i]
              for i in range(0, len(leaves), 2)]
merkle_root = leaves[0].hex()