Manage the Error in Sorana Help
In connection with Solana, the instructions are critical parts of intelligent contract programming. If an error occurs, the user interface (UI) may be challenged. In this article, we examine how the non -execution of the Sorana guidelines is done.
“Handy_error” Definition
In order to control the errors of the instructions, we must determine the unique “Handy_error” function that ensures an interface error message. You can use the “Result” type “Std :: Profit” module to replace the error value.
`Rust
Use STD :: Print;
// Specify the unique error type for commandment errors
#[Lead (debt)]
Struct Cuarterror {
MSG: string,
}
Imp Std :: Error :: Error instructions {}
Imp Std :: FMT :: Display with it
FN FMT (& myself, f: & mut std :: FMT :: Formater) -> STD :: FMT :: Result {Result {
Write! (F, "{}", self.msg)
}
}
Set the “Set -Stock” feature with error processing
Now, as we have defined our custom error type, change the stone_tokken function to deal with errors with AHandy_error".
Rust
PUB FN State_TOKEN (CTX: Context
// ... original code ...
Match Result :: Success {
Ok (token) => ok (()),
Err (e) => {{{{{
Eprintln! ("An error that requires the ID: {}", e);
Make an error = Error :: New ("Failed Token", E.TO_String ());
Handing_error (Error)
}
}
}
In this edited version, we added a “Reply” command that will return the error value if the command fails. If there is an error, we:
- Print an error message to the console.
- Create an expression of a single “error” structure by a “new” method.
3
implement “Handy_error” feature
In order to implement the “Handy_error” function, we can determine a simple structure used to display the interface faults:
`Rust
Use STD :: Error;
Use STD :: FMT;
// Set a copy of our individual error structure to deal with errors
Structural error {
Message: string,
}
IMP error :: Error error {}
Imp FMT :: Error Display {
FN FMT (& yourself, f: & mut fmt :: formater) -> FMT :: Result {
Write! (F, "{}", self.message)
}
}
Example to use
Here is an example of how the modified setretore_token" function is used:
Rust
Use solan_sdk :: {{{{{
Account_info :: {next_account_info, Accountinfo},
Income point,
Instructions_error:
};
fn main () {
Enter account_id = "Your_Account_id";
Let end_time = 10 * U64 :: POW (9, 15);
Group! ("statement_taken").
.EEXPECT (“No required sign”)
.Itabont ();
}
In this example, the “result” type was replaced by a batch that implemented the “error” feature. Then we give up a single error structure error! () `Macro.
By implementing a solid error processing mechanism, you can ensure that Solana’s instructions are reliable and easy to use. Don’t forget to keep the code organized and maintained by separating worries between the different parts of the code base.
