feat(account): show approximate tx execution cost before asking password

src/utils/cli.js

@@ -3,6 +3,7 @@
 import fs from 'fs-extra';
 import {
   AeSdk, Node, MemoryAccount, CompilerCli, CompilerCli8, CompilerHttpNode, recover, sign,
+  getExecutionCost, unpackTx, Tag,
 } from '@aeternity/aepp-sdk';
 import { PROMPT_TYPE, prompt } from './prompt.js';
 import { getFullPath } from './helpers.js';
@@ -55,6 +56,13 @@ export class AccountCli extends MemoryAccount {
     return sign(data, Buffer.from(secretKey, 'hex'));
   }
 
+  async signTransaction(transaction, options) {
+    const cost = Number(getExecutionCost(transaction)) / 1e18;
+    const txType = Tag[unpackTx(transaction).tag];
+    console.warn(`Cost of ${txType} execution ≈ ${cost}ae`);
+    return super.signTransaction(transaction, options);
+  }
+
   // Get account file by path, decrypt it using password and return AccountCli
   static async read(path, password) {
     const keyFile = await fs.readJson(getFullPath(path));

test/index.js

@@ -75,11 +75,15 @@ export async function executeProgram(program, args) {
     .configureOutput({ writeOut: (str) => { result += str; } })
     .exitOverride();
 
-  const { log } = console;
+  const { log, warn } = console;
   console.log = (...data) => {
     if (result) result += '\n';
     result += data.join(' ');
   };
+  console.warn = (...data) => {
+    if (/Cost of .+ execution ≈ .+ae/.test(data[0])) return;
+    warn(...data);
+  };
   const options = getProgramOptions(program);
   try {
     const allArgs = [
@@ -100,6 +104,7 @@ export async function executeProgram(program, args) {
     await program.parseAsync(allArgs, { from: 'user' });
   } finally {
     console.log = log;
+    console.warn = warn;
     isProgramExecuting = false;
     setProgramOptions(program, options);
   }