I'm working on a project where we need to get prices from 3 to 4 dex on the Ethereum chain and the Solana chain. What is the best way to get a live feed from Ethereum dex? I want to fetch the live state for a pool's pair and token price even if a single transaction is done.  I want to fetch the live state that automatically updates after every transaction.

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There are data aggregators which save the state of blockchains and give the any data at current block with API, so you can simply read it. For example it's Ankr.

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