Add hex util

packages/ethernaut-util/README.md

@@ -41,6 +41,7 @@ This plugin adds the tasks listed below.
 - unit Converts between different units of Ether
 - gas Fetch gas info on the current network
 - chain Finds a network name from a chain ID, or vice versa
+- hex Converts integers to hex
 
 ## Environment extensions
 

packages/ethernaut-util/src/tasks/hex.js

@@ -0,0 +1,13 @@
+const types = require('ethernaut-common/src/validation/types')
+const output = require('ethernaut-common/src/ui/output')
+
+require('../scopes/util')
+  .task('hex', 'Converts integers to hex')
+  .addPositionalParam('value', 'The value to convert.', undefined, types.int)
+  .setAction(async ({ value }, hre) => {
+    try {
+      return output.resultBox(hre.ethers.toQuantity(value))
+    } catch (err) {
+      return output.errorBox(err)
+    }
+  })

packages/ethernaut-util/test/tasks/hex.test.js

@@ -0,0 +1,10 @@
+const assert = require('assert')
+
+describe('hex', function () {
+  it('converts "42" to hex', async function () {
+    assert.equal(
+      await hre.run({ scope: 'util', task: 'hex' }, { value: '42' }),
+      '0x2a',
+    )
+  })
+})