Solana: TypeError: Cannot read properties of undefined (reading ‘kind’)

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Error Message Analysis: Solana TypeError Cannot Read Properties of Undefined

The error message “TypeError: Cannot read properties of undefined (reading ‘kind’)” is a common issue in Solana programming, where the kind property is being accessed on an object that is null or undefined. In this case, it’s happening when trying to set the idl parameter at the Program() method.

Understanding the Error

To debug this issue, let’s break down what’s happening:

The idl object is not defined.

When trying to access the kind property on the idl object, JavaScript throws a “TypeError: Cannot read properties of undefined (reading ‘kind’)” error.

Possible Causes

There are several reasons why this might be happening:

Missing import statement

: The idl object is not being imported or defined anywhere in the code.

Undefined Program method: The Program() method is not being called correctly, resulting in an undefined value for the idl parameter.

Type mismatch: The kind property is not being provided on the idl object.

Suggested Solutions

To resolve this issue, you can try the following:

Import the idl object: Make sure to import the idl object from a valid source, such as a Solana SDK or a library that provides an idl interface.

Verify the Program method signature: Ensure that the Program() method is being called correctly with the correct arguments, including the idl parameter.

Provide the required type for kind

: If you’re using TypeScript, make sure to specify the exact type of the kind property on the idl object.

Example Code


import { Program } from '@solana/web3.js';


const myIdl = {

  child: 'Program',

  // ... other properties ...

};


const idl = new Program(myIdl);


idleProgram();

In this example, we define an idl object with a kind property and pass it to the Program() method. The idlProgram() function should resolve successfully.

Conclusion

The “TypeError: Cannot read properties of undefined (reading ‘kind’)” error is often caused by a missing import statement or an incorrect call to the Program() method. By verifying the idl object and its properties, you can identify the root cause of the issue and fix it accordingly.

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Solana: TypeError: Cannot read properties of undefined (reading ‘kind’)