feat(fees): customizable gas limit and JSON flag (#43)

helpers/fees.ts

@@ -6,8 +6,6 @@ import axios from "axios";
 import { ethers } from "ethers";
 import { formatEther } from "ethers/lib/utils";
 
-const GAS_LIMIT = 350000;
-
 const formatTo18Decimals = (n: any) => parseFloat(formatEther(n)).toFixed(18);
 
 export const fetchZEVMFees = async (network: string) => {
@@ -33,15 +31,15 @@ export const fetchZEVMFees = async (network: string) => {
   };
 };
 
-export const fetchCCMFees = async (network: string) => {
+export const fetchCCMFees = async (network: string, gas: Number = 500000) => {
   const API = getEndpoints("cosmos-http", "zeta_testnet")[0]?.url;
   if (!API) {
     throw new Error("getEndpoints: API endpoint not found");
   }
 
   const chainID = getHardhatConfigNetworks()[network].chainId;
 
-  const url = `${API}/zeta-chain/crosschain/convertGasToZeta?chainId=${chainID}&gasLimit=${GAS_LIMIT}`;
+  const url = `${API}/zeta-chain/crosschain/convertGasToZeta?chainId=${chainID}&gasLimit=${gas}`;
   const { data } = await axios.get(url);
 
   const gasFee = ethers.BigNumber.from(data.outboundGasInZeta);
@@ -55,7 +53,7 @@ export const fetchCCMFees = async (network: string) => {
   };
 };
 
-export const fetchFees = async () => {
+export const fetchFees = async (gas: Number) => {
   let fees = {
     feesCCM: {} as Record<string, any>,
     feesZEVM: {} as Record<string, any>,
@@ -68,7 +66,7 @@ export const fetchFees = async () => {
       try {
         const zevmFees = await fetchZEVMFees(n);
         if (zevmFees) fees.feesZEVM[n] = zevmFees;
-        const ccmFees = await fetchCCMFees(n);
+        const ccmFees = await fetchCCMFees(n, gas);
         if (ccmFees) fees.feesCCM[n] = ccmFees;
       } catch (err) {}
     })

tasks/fees.ts

@@ -1,19 +1,34 @@
-import { task } from "hardhat/config";
+import { task, types } from "hardhat/config";
 import { HardhatRuntimeEnvironment } from "hardhat/types";
 
-import { fetchCCMFees, fetchFees } from "../helpers/fees";
+import { fetchFees } from "../helpers/fees";
 
 const main = async (args: any, hre: HardhatRuntimeEnvironment) => {
-  const fees = await fetchFees();
+  const fees = await fetchFees(args.gas);
 
-  console.log("\nOmnichain fees (in native gas tokens of destination chain):");
-  console.table(fees.feesZEVM);
-  console.log("\nCross-chain messaging fees (in ZETA):");
-  console.table(fees.feesCCM);
+  if (args.json) {
+    console.log(JSON.stringify(fees, null, 2));
+  } else {
+    console.log(
+      "\nOmnichain fees (in native gas tokens of destination chain):"
+    );
+    console.table(fees.feesZEVM);
+    console.log(
+      `\nCross-chain messaging fees (in ZETA, gas limit: ${args.gas}):`
+    );
+    console.table(fees.feesCCM);
+  }
 };
 
 export const feesTask = task(
   "fees",
   "Show omnichain and cross-chain messaging fees",
   main
-);
+)
+  .addOptionalParam(
+    "gas",
+    "Gas limit for a cross-chain messaging transaction",
+    500000,
+    types.int
+  )
+  .addFlag("json", "Print the result in JSON format");