feat: quote handler

packages/relayer/src/handlers/relayer/quote.ts

@@ -1,7 +1,12 @@
 import { NextFunction, Request, Response } from "express";
+import { getAddress } from "viem";
+import { getAssetConfig } from "../../config/index.js";
+import { RelayerError } from "../../exceptions/base.exception.js";
+import { web3Provider } from "../../providers/index.js";
+import { QuoteProvider } from "../../providers/quote.provider.js";
 import { QuoteMarshall } from "../../types.js";
-import { quoteService } from "../../services/index.js";
-import { QuoteService } from "../../services/quote.service.js";
+
+const TIME_30_SECS = 30 * 1000;
 
 export async function relayQuoteHandler(
   req: Request,
@@ -9,9 +14,23 @@ export async function relayQuoteHandler(
   next: NextFunction,
 ) {
 
-  await QuoteService.quoteFeeBPSNative(0n, 0n, 0n, 0n);
+  const chainId = Number(req.body.chain_id!);
+  const amountIn = BigInt(req.body.amount!.toString());
+  const tokenAddress = getAddress(req.body.token!.toString())
+
+  const config = getAssetConfig(chainId, tokenAddress);
+  if (config === undefined)
+    throw RelayerError.unknown(`Asset ${tokenAddress} for chain ${chainId} is not supported`)
+
+  const quoteProvider = new QuoteProvider(config.fee_bps);
+  const gasPrice = await web3Provider.getGasPrice(chainId);
+  const value = 0n;
+
+  const quote = await quoteProvider.quoteNativeTokenInERC20(chainId, tokenAddress, amountIn);
+  const feeBPS = await quoteProvider.quoteFeeBPSNative(amountIn, quote, gasPrice, value);
+
+  res
+    .status(200)
+    .json(res.locals.marshalResponse(new QuoteMarshall({ feeBPS, expiration: Number(new Date()) + TIME_30_SECS, relayToken: "" })));
 
-    res
-      .status(200)
-      .json(res.locals.marshalResponse(new QuoteMarshall({feeBPS: 10n, expiration: 1222, relayToken: ""})));
 }

packages/relayer/src/types.ts

@@ -42,6 +42,10 @@ export class QuoteMarshall extends RelayerMarshall {
     super();
   }
   override toJSON(): object {
-    return this.response;
+    return {
+      feeBPS: this.response.feeBPS.toString(),
+      expiration: this.response.expiration,
+      relayToken: this.response.relayToken
+    }
   }
 }