price subscriptions

src/blockchain/route.js

@@ -0,0 +1,29 @@
+import {queryHelperContract} from "@/blockchain/contract.js";
+import {Exchange} from "@/blockchain/orderlib.js";
+import {useStore} from "@/store/store.js";
+
+
+export async function findRoute(tokenA, tokenB) {
+    const helper = await queryHelperContract()
+    if (!helper)
+        throw Error('no helper')
+    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
+    for (let [exchange, fee, pool] of rawRoutes) {
+        exchange = Number(exchange)
+        fee = Number(fee)
+        if (result.fee === undefined || result.fee > fee) {
+            switch (exchange) {
+                case 0: // UniswapV2
+                    break
+                case 1: // UniswapV3
+                    const [token0, token1] = tokenA.address < tokenB.address ? [tokenA, tokenB] : [tokenB, tokenA]
+                    result = {chainId, exchange: Exchange.UniswapV3, pool, fee, token0, token1}
+                    break
+            }
+        }
+    }
+    return [result]
+}