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route price lookup fixes

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This commit is contained in:
Tim Olson
2023-11-18 15:57:50 -04:00
parent d1e304a562
commit 7293c101f8
5 changed files with 20 additions and 11 deletions
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10
src/blockchain/prices.js
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@@ -2,7 +2,7 @@ import {socket} from "@/socket.js";
import {useStore} from "@/store/store.js";
import {Exchange} from "@/blockchain/orderlib.js";
import {uniswapV3PoolAddress} from "@/blockchain/uniswap.js";
import {ethers} from "ethers";
import {ethers, FixedNumber} from "ethers";
import {uniswapV3PoolAbi} from "@/blockchain/abi.js";
const subscriptionCounts = {} // key is route and value is a subscription counter
@@ -82,8 +82,12 @@ async function getPriceForRoute(route) {
const pool = new ethers.Contract(addr, uniswapV3PoolAbi, provider)
const got = await pool.slot0()
const [sqrtPrice,,,,,,] = got
const spn = Number(sqrtPrice)
const price = spn*spn/2**(96*2) * 10**(route.token0.decimals-route.token1.decimals)
const spn = BigInt(sqrtPrice)
let price = spn*spn * 10n**BigInt(route.token0.decimals-route.token1.decimals)
const format = {decimals:38,width:512,signed:false}; // 38 decimals is 127 bits
price = FixedNumber.fromValue(price,0,format)
price = price.div(FixedNumber.fromValue(2n**(96n*2n),0,format))
price = price.round(18).toString()
console.log(`price for ${route.token0.symbol}/${route.token1.symbol}`,price)
store.poolPrices[addr] = price
return price