Truffle Introduction

Ethereum Smart Contract Programming 201
#106

You are trying to dowload or clone the source of ganache from github ?
You don’t need to compile ganache by your self, there is pre compile version on ganache available online, just download it from here:

1 Like
#107

Thanks @gabba

I am using Windows 10 Home (64-bit OS).
When I executed the command you gave me, I got the following error. Is there any specific location from which I need to execute this command or can I execute this from anywhere? I ran this on powershell as administrator.

PS C:\WINDOWS\system32> Set -ExecutionPolicy RemoteSigned
Set-Variable : A parameter cannot be found that matches parameter name ‘ExecutionPolicy’.
At line:1 char:5

  • Set -ExecutionPolicy RemoteSigned
  • ~~~~~~~~~~~~~~~~
    • CategoryInfo : InvalidArgument: (:slight_smile: [Set-Variable], ParameterBindingException
    • FullyQualifiedErrorId : NamedParameterNotFound,Microsoft.PowerShell.Commands.SetVariableCommand
#108

PS C:\WINDOWS\system32> Get -ExecutionPolicy
Get : The term ‘Get’ is not recognized as the name of a cmdlet, function, script file, or operable program. Check the
spelling of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:1

  • Get -ExecutionPolicy
  •   + CategoryInfo          : ObjectNotFound: (Get:String) [], CommandNotFoundException
  + FullyQualifiedErrorId : CommandNotFoundException
#109

The following command worked, I reckon

Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted -Force;

The truffle installation output is as follows:
PS C:\WINDOWS\system32> Set-ExecutionPolicy -Scope CurrentUser -ExecutionPolicy Unrestricted -Force;
PS C:\WINDOWS\system32> npm install -g [email protected]
npm WARN deprecated [email protected]: Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.)
C:\Users\simpl\AppData\Roaming\npm\truffle -> C:\Users\simpl\AppData\Roaming\npm\node_modules\truffle\build\cli.bundled.js

[email protected] postinstall C:\Users\simpl\AppData\Roaming\npm\node_modules\truffle
node ./scripts/postinstall.js

  • Fetching solc version list from solc-bin. Attempt #1

I tried to download Ganache from the portal you gave me, it is throwing this error “Failed - Network error” towards the end of downloading. Eventually the download fails.

#110

Hi @simplyprado

You can run it from everywhere in your powershell command line be careful there is no space between Set and -ExecutionPolicy
it’s Set-ExecutionPolicy and Get-ExecutionPolicy
I can see a space in your command.

It’s weird that you have an error from Ganache web site maybe a problem with your connexion. It works last time i tried.

Otherwise you can also install ganache with npm:

npm install ganache-cli

2 Likes
#111

PS C:\WINDOWS\system32> npm install ganache-cli
npm ERR! code EINTEGRITY
npm ERR! sha512-VPBumkNUZzXDRQwVOby5YyQpd5t1clkr06xMgB28lZdEIn5ht1GMwUskOTFOAxdkQ4J12IWP0gdeacVRGowqbA== integrity checksum failed when using sha512: wanted sha512-VPBumkNUZzXDRQwVOby5YyQpd5t1clkr06xMgB28lZdEIn5ht1GMwUskOTFOAxdkQ4J12IWP0gdeacVRGowqbA== but got sha512-A16POSHNkkX9i0GYsV0w9bkAEcUT/TqDSxrP1D2O05Ap6NVIWx40Xe0pDNJIHbLv2muQzAQ6jHeb/rZapk9/XA==. (3672464 bytes)

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\simpl\AppData\Roaming\npm-cache_logs\2020-05-11T21_31_50_782Z-debug.log

#112

Hi @simplyprado

Why are you located in PS C:\WINDOWS\system32 ?
This folder is where most of your operating system files are located, this is a terrible place to install your project dependencies .

npm install (without -g ) is going to install node-modules in the directory so do not do that, otherwise use the -g to install it globally.

So to solve your issue go where your project is located, if you don’t have this file package.json start by doing this commands.

npm init
npm install ganache-cli

Otherwise is you already have a package.json file in your project folder, clean everything with the following command:

rm -rf node_modules
rm package-lock.json
npm cache clean --force
npm install ganache-cli --verbose

If after that you still have an issue share your log here

1 Like
#117

oh boy, still no luck.

MiAms-iMac:advancedsoliditycourse iMac$ npm install -g [email protected]
npm WARN deprecated [email protected]: Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.)
npm WARN checkPermissions Missing write access to /usr/local/lib/node_modules
npm ERR! code EACCES
npm ERR! syscall access
npm ERR! path /usr/local/lib/node_modules
npm ERR! errno -13
npm ERR! Error: EACCES: permission denied, access '/usr/local/lib/node_modules'
npm ERR!  [Error: EACCES: permission denied, access '/usr/local/lib/node_modules'] {
npm ERR!   errno: -13,
npm ERR!   code: 'EACCES',
npm ERR!   syscall: 'access',
npm ERR!   path: '/usr/local/lib/node_modules'
npm ERR! }
npm ERR! 
npm ERR! The operation was rejected by your operating system.
npm ERR! It is likely you do not have the permissions to access this file as the current user
npm ERR! 
npm ERR! If you believe this might be a permissions issue, please double-check the
npm ERR! permissions of the file and its containing directories, or try running
npm ERR! the command again as root/Administrator.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/iMac/.npm/_logs/2020-05-16T01_43_59_732Z-debug.log
#118

woah… okay so I used

sudo -s

and that allowed me to access th folder and install truffle… I am going to see if I can go on with the course now!!!
ML

#119

Hi @Blockchain4MiAm
Your user doesn’t have the correct right on the /usr/local/lib/node_modules folder
If you want to solve it you can change the permission of this folder instead of install it with sudo (which is the “super Admin” user )

sudo chown -R $USER /usr/local/lib/node_modules
1 Like
#120

Hi @filip
When trying to install truffle (I am on a Mac) the terminal gave me “The operation was rejected by your operating system. npm ERR! It is likely you do not have the permissions to access this file as the current user”
I reinstalled as sudo and it worked OK. My question is: is it OK to install truffle as sudo?

1 Like
#121

Hi @martintokyo
You can, but it’s better to set the correct permission on your global folder, see my previous message.
Otherwise all the package you will install with sudo will have the superAdmin user persmission (the user root)

1 Like
#122

Thanks gabba for this rapid reply. I will do so.

1 Like
#125

the threading on this forum needs work. It’s not clear who is answering who.

#126

hey @filip or any other knowledgeable person!

I am stuck when trying to execute the test. I can’t see why it’s not working. I have checked my code and checked it against yours. I have tried it on two systems with almost identical errors:

TypeError [ERR_INVALID_REPL_INPUT]: Listeners for `uncaughtException` cannot be used in the REPL
    at process.<anonymous> (repl.js:259:15)
    at process.emit (events.js:327:22)
    at process.emit (C:\Users\username\AppData\Roaming\npm\node_modules\truffle\build\webpack:\~\source-map-support\source-map-support.js:465:1)
    at processEmit [as emit] (C:\Users\username\AppData\Roaming\npm\node_modules\truffle\build\webpack:\~\signal-exit\index.js:155:1)
    at _addListener (events.js:358:14)
    at process.addListener (events.js:406:10)
    at Runner.run (C:\Users\username\AppData\Roaming\npm\node_modules\truffle\node_modules\mocha\lib\runner.js:868:11)
    at Mocha.run (C:\Users\username\AppData\Roaming\npm\node_modules\truffle\node_modules\mocha\lib\mocha.js:612:17)
    at C:\Users\username\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\core\lib\test.js:128:1
    at new Promise (<anonymous>)
    at Object.run (C:\Users\username\AppData\Roaming\npm\node_modules\truffle\build\webpack:\packages\core\lib\test.js:127:1)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)

I don’t think it’s the code, because it compiles and deploys correctly and functions and also, even when all the code in the test file is commented out, it still throws the same error :-S

#127

Hi @Kiki

On which system did you try as i can see this one is Windows, what is the other one ?
Can you share your version of node and truffle ?

You can use the following answers to solve your REPL issue.

Or the one reinstall Node version 10.18.0 with nvm

https://forumtest.ivanontech.com/t/introduction-to-unit-testing/10052/45

1 Like
#129

Hello @filip

I follow do everything exactly as you show in the video but then I get an error. I’m doing everything on Windows terminal

First I do this and it works fine:
let instance = await Helloworld.deployed()

But then I want to call the getMessage function:
instance.getMessage()

It gives the following error:
Uncaught TypeError: instance.getMessage is not a function

Although I checked in the instance and it does contain the getMessage function as is shown in the video.

Could you please help me solve this issue?

#130

Hi @Cemil

Can you share your migration file ?
Use the preformatted tag to display your code correctly
thx you

1 Like
#131

Hi @gabba

Here is my 1_initial_migration.js file

const Migrations = artifacts.require("Migrations");

module.exports = function(deployer) {
  deployer.deploy(Migrations);
};

And this is the 2_Helloworld_deploy.js file

const Helloworld = artifacts.require("Helloworld");

module.exports = function(deployer) {
  deployer.deploy(Helloworld);
};

Many thanks,
Cemil

#132

Hi @Cemil
Your migration files are correct, i guess

const Helloworld = artifacts.require("Helloworld");

Is also included in you test.js ?

Can you try this command

truffle migrate --reset

And try again ?

1 Like