Controller Structure

Account Structure

Here's the complete Rust representation of the Controller account:

Copy#[account]
pub struct Controller {
    /// The controller authority (32 bytes)
    pub authority: Pubkey,

    /// Fee vault address derived from authority (32 bytes)
    pub fee_vault: Pubkey,

    /// Fee (in lamports) required per airdrop action (8 bytes)
    pub fee_lamports: u64,

    /// Versioning for upgrades (1 byte)
    pub version: u8,

    /// PDA bump seed (1 byte)
    pub bump: u8,
    
    /// Fee vault bump seed (1 byte)
    pub fee_vault_bump: u8,
}