Remaining Accounts#

Some Solana instructions require additional accounts beyond their primary accounts. These are called "remaining accounts" and can be configured using the set_remaining_accounts function.

Manual Remaining Accounts Setup#

Remaining accounts are defined as a struct with the TridentRemainingAccounts derive macro. The macro expects remaining accounts as an array of TridentAccount, allowing you to specify any number of additional accounts.

Remaining Accounts Configuration

Do not forget to add remaining accounts to the Instuction struct. Additionally the field has to be named remaining_accounts.

Here's an example of how to set up remaining accounts:

pub struct SomeInstruction {
    pub accounts: SomeInstructionAccounts,
    pub data: SomeInstructionData,
    pub remaining_accounts: SomeInstructionRemainingAccounts,
}

#[derive(Arbitrary, Debug, Clone, TridentRemainingAccounts)]
pub struct SomeInstructionRemainingAccounts {
    pub remaining_accounts: [TridentAccount; 5],
}

impl InstructionSetters for SomeInstruction {
    type IxAccounts = FuzzAccounts;

    fn set_remaining_accounts(
        &mut self,
        client: &mut impl FuzzClient,
        fuzz_accounts: &mut Self::IxAccounts,
    ) {
        // Get the account from storage using the generated index
        let owner = fuzz_accounts
            .owner
            .get_or_create(self.remaining_accounts.remaining_accounts[0].account_id, client, None, None);

        // Configure the account meta with:
        // - Account public key
        // - is_signer flag (false in this example)
        // - is_writable flag (true in this example)
        self.remaining_accounts.remaining_accounts[0].set_account_meta(
            owner,
            false,
            true
        );
    }
}

The set_remaining_accounts function works similarly to set_accounts
Each remaining account can be configured with its own signer and writable permissions
You can access remaining accounts using array indexing (e.g., remaining_accounts[0])
The number of remaining accounts is fixed at compile time by the array size