UNI TWAP support for getting prices

[shayzluf]

example query for MKR previous day token price:

https://thegraph.com/hosted-service/subgraph/uniswap/uniswap-v3

{
token(id:"0x9f8f72aa9304c8b593d555f12ef6589cc3a579a2") {
  id
  name
  tokenDayData(skip:1,first:1) {
   priceUSD
  }
}
}

multiple tokens can be retrieved in that way

{
 tokens(  where: {
   id_in : [
 "0xc944e90c64b2c07662a292be6244bdf05cda44a7",
 "0x1f9840a85d5af5bf1d1762f925bdaddc4201f984"
]
  }
 ) {
    id
    tokenDayData(skip:1,first:1){priceUSD
  }
  
  }
    
 }

[leviyehonatan]

apollographql/apollo-client#84 (comment)

this technique is used