error[E0412]: cannot find type `ProgramResult` in this scope

Question

use anchor_lang::prelude::*;

declare_id!("Fg6PaFpoGXkYsidMpWTK6W2BeZ7FEfcYkg476zPFsLnS");

#[program]
pub mod myepicproject {
  use super::*;
  pub fn start_stuff_off(ctx: Context<StartStuffOff>) -> ProgramResult {
    Ok(())
  }
}

#[derive(Accounts)]
pub struct StartStuffOff {}

I have the source rust code above and the error below.

error[E0412]: cannot find type `ProgramResult` in this scope
 --> programs/myepicproject/src/lib.rs:8:58
  |
8 |   pub fn start_stuff_off(ctx: Context<StartStuffOff>) -> ProgramResult {
  |                                                          ^^^^^^^^^^^^^ not found in this scope

For more information about this error, try `rustc --explain E0412`.
error: could not compile `myepicproject` due to previous error

Have any suggestion?

Using Anchor

The last version with `ProgramResult` was `anchor_lang` v0.21.0 [It looks like from `0.22.0` and on you're supposed to use just `Result<()>` instead](https://github.com/project-serum/anchor/blob/master/CHANGELOG.md#breaking-1) — PitaJ, Mar 21 '22 at 16:31
I used Result<()> instead ProgramResult. But have warning. I'm newbie on Rust development and this is the first step of my learning Rust. Please tell me more detail and specifically. — yeshealer, Mar 21 '22 at 18:46
What is the warning that you are getting? As long as your compilation doesn't fail; the code should work as expected. Most warnings from the compiler will notify you when you violate best practices. — Cassie, Mar 26 '22 at 02:40

score 8 · Answer 1 · answered Apr 10 '22 at 18:26

8

this solves the issue. you have to explicitly import it

use anchor_lang::solana_program::entrypoint::ProgramResult;

answered Apr 10 '22 at 18:26

Yilmaz

35,338
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score 7 · Accepted Answer · edited Apr 06 '22 at 01:17

7

Try like that:

pub fn start_stuff_off(ctx: Context<StartStuffOff>) -> Result<()> {

edited Apr 06 '22 at 01:17

bguiz

27,371
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answered Apr 05 '22 at 23:42

Anna

96
2

error[E0412]: cannot find type `ProgramResult` in this scope

2 Answers2