price constraints working

src/blockchain/route.js

@@ -10,14 +10,15 @@ export async function findRoute(tokenA, tokenB) {
     const chainId = useStore().chainId
     const rawRoutes = await helper.getRoutes(tokenA.address, tokenB.address)
     // todo expose all available pools
-    let result = {} // we actually only find a single pool for now
+    console.log('raw routes', rawRoutes)
+    let result = null // we actually only find a single pool for now
     for (let [exchange, fee, pool] of rawRoutes) {
         exchange = Number(exchange)
         fee = Number(fee)
-        if (result.fee === undefined || result.fee > fee) {
+        if (!result || result.fee > fee) {
             switch (exchange) {
                 case 0: // UniswapV2
-                    break
+                    throw Error('Uniswap V2 not yet supported')
                 case 1: // UniswapV3
                     const [token0, token1] = tokenA.address < tokenB.address ? [tokenA, tokenB] : [tokenB, tokenA]
                     result = {chainId, exchange: Exchange.UniswapV3, pool, fee, token0, token1}
@@ -25,5 +26,5 @@ export async function findRoute(tokenA, tokenB) {
             }
         }
     }
-    return [result]
-}
+    return result ? [result] : []
+}