[JS->TS] Migrate invokeViewFunction.js (#815)

* Migrate appropriate utilities and invokeViewFunction.js
* cast info to unknown and log the output to console

scripts/invoke_view_function.ts

@@ -0,0 +1,25 @@
+import { parseArgs, getBatchExchange } from "./util";
+
+module.exports = async (callback: Truffle.ScriptCallback) => {
+  try {
+    const args = parseArgs();
+    if (args.length < 1) {
+      callback(
+        "Error: This script requires arguments - <functionName> [..args]",
+      );
+    }
+    const [functionName, ...arg] = args;
+    const exchange = await getBatchExchange(artifacts);
+    const info: unknown = await exchange.contract.methods[functionName](
+      ...arg,
+    ).call();
+    // Note that this script is intended to be used for bash scripting and
+    // one would usually grep for the results of this execution. Thus,
+    // the raw output is printed rather than include irrelevant log details.
+    // eslint-disable-next-line no-console
+    console.log(info);
+    callback();
+  } catch (error) {
+    callback(error);
+  }
+};

scripts/util.ts

@@ -88,3 +88,12 @@ export async function addTokens(
   // Return token information
   return tokens;
 }
+
+export function parseArgs(): string[] {
+  const args = process.argv.slice(4);
+  const index = args.indexOf("--network");
+  if (index > -1) {
+    args.splice(index, 2);
+  }
+  return args;
+}

scripts/utilities.js

@@ -1,14 +1,5 @@
 import { setAllowance } from "./util"
 
-const getArgumentsHelper = function () {
-  const args = process.argv.slice(4)
-  const index = args.indexOf("--network")
-  if (index > -1) {
-    args.splice(index, 2)
-  }
-  return args
-}
-
 const getOrderData = async function (instance, callback, web3, argv) {
   const minBuy = web3.utils.toWei(String(argv.minBuy))
   const maxSell = web3.utils.toWei(String(argv.maxSell))
@@ -31,24 +22,6 @@ const getOrderData = async function (instance, callback, web3, argv) {
   return [argv.buyToken, argv.sellToken, minBuy, maxSell, sender]
 }
 
-const invokeViewFunction = async function (contract, callback) {
-  try {
-    const args = getArgumentsHelper()
-    if (args.length < 1) {
-      callback("Error: This script requires arguments - <functionName> [..args]")
-    }
-    const [functionName, ...arg] = args
-
-    const instance = await contract.deployed()
-    const info = await instance[functionName].call(...arg)
-
-    console.log(info)
-    callback()
-  } catch (error) {
-    callback(error)
-  }
-}
-
 async function createMintableToken(artifacts) {
   const ERC20Mintable = artifacts.require("ERC20Mintable")
   return ERC20Mintable.new()
@@ -128,9 +101,7 @@ async function mintOwl({ users, minter, amount, owl }) {
 }
 
 module.exports = {
-  getArgumentsHelper,
   getOrderData,
-  invokeViewFunction,
   mintOwl,
   deleteOrders,
   setAllowances,

scripts/wait_seconds.js

@@ -1,9 +1,9 @@
 const { waitForNSeconds } = require("../build/common/test/utilities")
-const { getArgumentsHelper } = require("./script_utilities.js")
+const { parseArgs } = require("../build/common/scripts/util")
 
 module.exports = async (callback) => {
   try {
-    const args = getArgumentsHelper()
+    const args = parseArgs()
     if (args.length != 1) {
       callback("Error: This script requires arguments - <seconds>")
     }