is there a good on-chain price oracle these days? looking for the price of an arbitrary erc-20 token relative to some common currency (e.g. ether or USDT). the best i have thus far is computing the uniswap V3 pool or uniswap V2 pair address and getting the price that way. however, this breaks down as soon as there is no direct link to whatever common currency i'd choose. is there an oracle that provides a more abstract view on erc-20 token prices?