FAQ

What is quoted amount?

Quoted amount is the amount a DEX aggregator returns for a trade.

What is simulated amount?

The simulated amount is the amount after quote simulation. If a DEX aggregator’s quoted amount is inaccurate, the simulated amount will differ and should be considered more accurate. Accurate quotes result in better trade execution.

What is received amount?

Received amount is the amount a user actually receives after a trade transaction settles on the blockchain. Unfortunately, there is no way to accurately predict the exact received amount before sending the transaction.

What is MEV & how to protect against it?

What is MEV? MEV stands for Maximal Extractable Value. While its exact definition is relatively technical, you can think about it as values can be extracted by ordering transactions differently in a block. Blockchain transactions on EVM chains are by default public which means they can be seen by anyone. Let's walk through a simplified example. If a user sends a transaction to sell USDC to tokenB with a high slippage. What this means is that the user is willing to accept a price worse than the current market price up to the slippage. A bot sees this transaction and decides this transaction could be potentially profitable. What the bot could do is to construct a transaction that buys tokenB right before the user's transaction and then sell tokenB right after the user's transaction. The profit is made because the bot buys tokenB at a lower price and sells it at a higher price. The user, unfortunately, receives less tokenB. How to protect against MEV? To protect against MEV, you need to make your transaction private when sending the transaction from your wallet. Matcha Meta provides MEV protected RPC url for chains that are available but you are free to use other MEV protected RPC url.

You will need to add the RPC url to your wallet and use the RPC url when you send the transaction since Matcha Meta does NOT control your wallet / transaction.

Do you support intent-based aggregators like Cow Swap?

No. Matcha Meta currently supports DEX aggregator APIs like 0x, 1inch, and Odos that provide full routing instructions (calldata) in their API responses, enabling quote simulation. Matcha Meta verifies the integrity of the suggested route and quoted price directly onchain.

Matcha Meta does not include quotes from intent-based systems where execution occurs in an offchain auction (CoW Swap, 1inch Fusion, UniswapX) because Matcha Meta can't verify the integrity of the quote. We want to avoid showing users quotes that appear competitive but take too long to execute or fail to execute at all.