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Closing of a public data account (PDA) on Solana: a step by step guide
The closure of a public data account (PDA) on Solana can be a little delicate, especially when you are not familiar with the anchor protocol and its nuances. In this article, we will guide you throughout the process of closing a PDA token account using the anchor SDK.
Prerequisites:
- You have a configured solana node and running.
- You have an anchoring portfolio installed on your Solana knot.
- You understand the basic concepts of public data accounts (PDA) and their use in the anchoring protocol.
Step 1: Create a PDA account
First, create a new PDA account using the anchor SDK. This implies generating a new mnemonic sentence and creating a new PDA account with a name, a goal and other specific metadata.
`Rust
Use Anchor_lang :: Account_info;
Use Anchor_lang :: Entrypoint;
[entrance]
fn hand () {
// create a new PDA account
Leave Mut Create_PDA = Accountinfo :: From_id ("Pdaaccountid");
CREATE_PDA.SET_NAME ("Mypda -centname"). Set_purpose ("Somepurpose"). set_metadata (Vec! []);
Let _ = anchor_lang :: script :: create_pda (create_pda) .Signers ();
}
'
Step 2: Get the ID from the PDA account
Then you must obtain the PDA account ID associated with your newly created account. You can do this by questioning the databaseSolana_Token ‘for all token accounts that are part of a PDA.
`Rust
Use Solana_sdk :: Entrypoint :: Get_pda_account_id;
// Get the ID from the PDA account
Leave pda_account_id = get_pda_account_id ("Some_mnemonic");
'
Step 3: Close the PDA account
Now you can close the PDA account using the anchor SDK. You will have to go into the ID of the PDA account and the reason for closing the account.
Rust
Use Anchor_lang :: Entrypoint;
[entrance]
fn hand () {
// Get the state of the current account
Let MUT give birth_state = accountant :: new ();
// Close the PDA account
account_state.close_pda_account (pda_account_id, "reasonforclosing" .to_string ()). Signator ();
}
'
Step 4: update the token account
Finally, you will have to update the token account associated with your closed PDA account to reflect the new state of the PDA. This implies updating the databaseSolana_Token ‘with the new account ID.
`Rust
Use Solana_SDK :: Entrypoint :: Update_Token_account;
// update the token account
Leave Mut Update_TOKEN_ACCOUNT = Accountupdate :: New (). set_pda_account_id (pda_account_id) .Signers ();
Update_TOKEN_ACCOUNT.SIGN (& account_state);
'
That's it! With these steps, you should be able to close a PDA token account on Solana using the anchor SDK. Do not forget to keep your mnemonic sentence in safety and use it only for this purpose.
Example of use cases:
Here is an example of how you can use the anchor SDK to close a PDA account in a wider application:
Rust
Use Anchor_lang :: Account_info;
Use Anchor_lang :: Entrypoint;
[entrance]
fn hand () {
// create a new PDA account
Leave Mut Create_PDA = Accountinfo :: From_id ("Pdaaccountid");
CREATE_PDA.SET_NAME ("Mypda -centname"). Set_purpose ("Somepurpose"). set_metadata (Vec! []);
Let _ = anchor_lang :: script :: create_pda (create_pda) .Signers ();
// Get the ID from the PDA account
Leave pda_account_id = get_pda_account_id ("Some_mnemonic");
// Close the PDA account
account_state.close_pda_account (pda_account_id, "reasonforclosing" .to_string ()). Signator ();
// update the token account
Update_token_account (
Accountupdate :: new (). Set_pda_account_id (pda_account_id) .Signers (),
) .Sign (& account_state);
}
` ‘
I hope this article was useful to understand how to close a PDA token account on Solana using the anchor SDK! Let me know if you have any other questions or if you need additional help.