# Approve TL;DR:- Approvals are required because Polynomial uses the Ethereum blockchain to settle transactions. When using a Decentralized Application(dApp) like Polynomial, you must first approve each token you plan to deposit. Polynomial uses smart contracts on the Ethereum blockchain to execute transactions. To use a smart contract, you must : * Permit it to validate your token balance * Let it transfer the number of tokens you wish to trade from your wallet.