bugfixes

src/misc.js

@@ -1,5 +1,6 @@
 import {FixedNumber} from "ethers";
-import {useStore} from "@/store/store.js";
+import {usePrefStore, useStore} from "@/store/store.js";
+import {token} from "@/blockchain/token.js";
 
 export class SingletonCoroutine {
     constructor(f, delay=10, retry=true) {
@@ -84,3 +85,42 @@ export function timestamp(date=null) {
         date = new Date()
     return Math.round(date.getTime() / 1000)
 }
+
+
+export function pairKey(tokenA, tokenB) {
+    const token0 = tokenA.address < tokenB.address ? tokenA.address : tokenB.address
+    const token1 = tokenA.address > tokenB.address ? tokenA.address : tokenB.address
+    return [token0, token1];
+}
+
+
+export function pairPriceAddr(baseTokenAddr, quoteTokenAddr, price) {
+    const baseToken = token(baseTokenAddr)
+    const quoteToken = token(quoteTokenAddr)
+    if( !baseToken || !quoteToken )
+        return null
+    return pairPrice(baseToken, quoteToken, price)
+}
+
+
+export function pairPrice(baseToken, quoteToken, price, decimals=null) {
+    if( price === null || price === undefined )
+        return price
+    if( decimals === null )
+        decimals = baseToken.decimals-quoteToken.decimals
+    console.log('pairPrice', baseToken, quoteToken, price, decimals)
+    if( decimals >= 0 )
+        price /= 10 ** decimals
+    else
+        price *= 10 ** -decimals
+    const invertedKey = pairKey(baseToken, quoteToken);
+    const prefs = usePrefStore()
+    if( !(invertedKey in prefs.inverted) ) {
+        // todo prefer stablecoins as the quote asset
+        prefs.inverted[invertedKey] = false
+    }
+    if( prefs.inverted[invertedKey] )
+        price = 1/price
+    return price
+}
+