One-Time Approval

What is One-Time Approval

Since Matcha Meta was developed by the team at 0x, a leading DEX Aggregator, many users have already trusted the 0x smart contracts with billions of dollars in approvals.

Matcha Meta allows users to reuse their approvals on 0x's smart contracts and trade on any aggregator.

Whack-a-mole Approvals

This solves the annoying problem where Odos might have the best quote, and then you go to set the approval on Odos, only for the quotes to refresh and 1inch becomes the top quote. Now you have to set the approval on 1inch, and by the time you finish doing that, Velora might be the top quote. You end up in a frustrating hamster wheel of approvals. Not only is this a frustrating experience, it increases your security surface area. It feels like a game of whack-a-mole.

This is a common experience on other Meta Aggregators.

Without any additional trust assumptions (assuming you were willing to trade on 0x anyways), Matcha Meta eliminates this problem with One-Time Approvals. Approve once, trade anywhere.