Разбиране на грешката „без функция или свързан елемент с име create_type“ на Solana
Като приложения за изграждане на разработчици на блокчейн Solana, не е рядкост да се сблъскате с грешки, свързани с разработването на интелигентни договори. Една такава грешка е грешката „Без функция или свързан елемент с име Create_Type“, която може да възникне при опит да се използва персонализиран тип, дефиниран в програмата Solana.
Problem: Error E0599
In the provided code fragment:
`Rust
Use solana_program :: Program_error :: {error, errorkind};
Use solana_program :: pubkey :: pubkey;
Use Solana_type :: Create_type;
// Determine your custom type here
PUB FN Main () -> Result <(), error :: error> {
// Your logic of the program here ...
// Create a new transaction with the personalized type
Let TX = Create_type! (t) such as & _, 10U64; // t is your personalized type and "AS & _"
}
The error arises because Create_type! The function does not exist in Solana SDK. Instead, you should use Program_error :: Errorkind :: Customtype to deal with this particular error.
correct error
To correct the error, you must determine a personalized type and then use it when creating transactions. Here is an updated version of the code:
`Rust
Use solana_program :: Program_error :: {error, errorkind};
Use solana_program :: pubkey :: pubkey;
Use STD :: MEM;
// Determine your custom type here
PUB FN Main () -> Result <(), error :: error> {
// Create a new transaction with the personalized type
Let TX = Create_type! (t) such as & _, 10U64; // t is your personalized type and "AS & _"
// Check that the transaction has been successfully created
Match TX {
OK (_) => println! ("Transaction was created successfully"),,
ERR (ERR) => Error! ("Failed to create a transaction", error),
}
}
Understanding Personalized Types
In Solana you can define custom types by using the macro Create_type!. This macro is used to generate a code to create custom types.
Here’s an example of a basic personalized type:
`Rust
Use Solana_type :: Create_type;
Type MYCustomtype = U8;
With this definition we can use it when creating transactions:
`Rust
PUB FN Create_transction () -> Programresult {
// Create a new transaction with the personalized type
Let TX = mycustomtype :: new (10);
Good (())
}
Conclusion
In this article, we saw how to correct the error “Without a function or connected element named Create_type” by Solana. By defining your own personalized types and using them when creating transactions, you can build more complex blockchain applications.
Remember to always check Solana’s official documentation about the latest information about languages and programming types.
Leave a Reply