For some migration purpose I need to load a pda account with AccountInfo , reallocate and update the fields. I am able to make other parts right got stuck updating/modifying account data. Transaction is succeeding but account field is not getting updated.

Here is a minimal code example.

let collection_account: &mut AccountInfo = &mut ctx.accounts.collection_info;
let mut data:&[u8] = &** collection_account.try_borrow_mut_data().unwrap();
let mut collection_info: CollectionInfo = CollectionInfo::try_deserialize(&mut data).unwrap();

collection_info.version = CollectionInfo::VERSION;
#[instruction(collection_address: Pubkey)]
pub struct CollectionInfoMigration<'info> {
    pub payer: Signer<'info>,

    /// CHECK: This is not dangerous because we don't read or write from this account
        seeds = [ COLLECTION_INFO_SEED, collection_address.as_ref() ],
    pub collection_info: AccountInfo<'info>,

    pub system_program: Program<'info, System>,

1 Answer 1


You should try deserializing using anchor_lang::Account::try_from and creating a mutable reference when instantiating the struct variable before changing the values:

let collection_info = &mut Account::<CollectionInfo>::try_from(&mut ctx.accounts.collection_info)?;
collection_info.version = CollectionInfo::VERSION;

You may also need to manually call the Account::exit function on the account after the mutations are complete because this Account is being created out-of-bound from the self-managing ones created via the Context struct:

  • 1
    That worked, Thanks a lot. Mar 7, 2023 at 17:02

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