Here is an example of an article about creating a function using any public key as the signing device of a Solana function:

Creating a function using any Pubkey as a signer in Solana

In the world of blockchain, having different types of accounts (or "signers") can be crucial for creating complex applications. One common scenario is when you want to create a function that requires the approval of two or more signatories. In this article, we'll look at how to achieve this in Solana using Anchor.

The Basics

Before diving into the code, let's quickly review some basic concepts:

• A signatory is an account that has a private key (also known as a "public key") and can be used to sign messages or contracts.

• It is not necessary to specify the type of subscriber in the investment program. Instead, you will use the "declare_id!" macro to declare it.

Example Code

Here's an example of a code snippet that shows how to create a function after signing any public key:

use anchor_lang::prelude::*;


declare_identifier!("5Fb2dXrY8jW4K9yfB6JhZz1aPpUu3oK9kqCZcR7eJLs");


#[program]

pub fn create_function(

    #[-parameter] 

    pub new_value: string,

    #[parameter] 

    Pub pubkey1: Public key,

    #[parameter] 

    Pub pubkey2: Public key,

) -> Result<(), error> {

    let mut account = [

        Signer::new(&publickey1, 1),

        Subscriber::new(&pubkey2, 1),

    ];


    let(address, account) = self.signer_sign_out(account)?;


    // Now we can use the signed address and account to call our function

    #[resolve(dead_code)]

    pub fn my_function(

        #[options] 

        param_value: string,

    ) -> Result {

        let result = Account::call(&address, "my_function", ¶m_value)?;

        good (result)

    }

}

In this example, we have created a "create_function" program that has three parameters:

• new_value: the string that our function should return

• "pubkey1" and "pubkey2": these are two public keys. In Anchor, you can use any public key as a signature for your functions.

• The "signer_sign_out" function returns the string "(address, account)", where "address" is the signed address and "account" is the signed account.

When we call "my_function", we pass "param_value": "hello". Since pubkey1 and pubkey2 are any signing keys, we can use them to sign this parameter value. The Account::call function returns a result of type Result indicating whether the call was successful.

Conclusion

In this article, we looked at how to create a function with any public key as a Solana signer using Anchor. Using the macro "declare_id!" and "Signer::new" to create signers, you can write functions that require multiple signers to verify their execution. Don't forget to secure your code by following best practices for signing and verifying signatures.

Hope this helps! Let me know if you have any questions or need further clarification on any of the concepts discussed in this article.

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