The instant_withdraw_vault instruction allows a user to withdraw assets from the vault instantly, bypassing the two-step request/withdraw flow. This burns LP tokens directly and transfers the underlying assets in a single transaction.
This instruction will fail with InstantWithdrawNotAllowed if the vault’s withdrawal_waiting_period is not zero. Only vaults configured with instant withdrawals support this instruction.
Discriminator
/// sha256("global:instant_withdraw_vault")[0..8]
fn get_instant_withdraw_vault_discriminator() -> [u8; 8] {
[221, 56, 115, 168, 128, 220, 235, 245]
}
Parameters
| Parameter | Type | Description |
|---|
amount | u64 | The withdrawal amount (interpretation depends on is_amount_in_lp) |
is_amount_in_lp | bool | If true, amount is in LP tokens. If false, amount is in underlying asset tokens |
is_withdraw_all | bool | If true, withdraws the user’s entire LP balance regardless of amount |
Accounts
| Account | Mutability | Signer | Description |
|---|
user_transfer_authority | Immutable | Yes | The user withdrawing assets |
protocol | Immutable | No | Global Voltr protocol state account |
vault | Mutable | No | The vault state account |
vault_asset_mint | Immutable | No | The mint of the asset being withdrawn |
vault_lp_mint | Mutable | No | The vault’s LP mint |
user_lp_ata | Mutable | No | The user’s LP token account (source for burn) |
vault_asset_idle_ata | Mutable | No | The vault’s idle asset token account |
vault_asset_idle_auth | Mutable | No | PDA authority over vault_asset_idle_ata |
user_asset_ata | Mutable | No | The user’s asset token account (destination) |
asset_token_program | Immutable | No | Token Program or Token-2022 for assets |
lp_token_program | Immutable | No | Token Program for LP tokens |
system_program | Immutable | No | Solana System Program |
CPI Struct
pub struct InstantWithdrawVaultParams<'info> {
pub user_transfer_authority: AccountInfo<'info>,
pub protocol: AccountInfo<'info>,
pub vault: AccountInfo<'info>,
pub vault_asset_mint: AccountInfo<'info>,
pub vault_lp_mint: AccountInfo<'info>,
pub user_lp_ata: AccountInfo<'info>,
pub vault_asset_idle_ata: AccountInfo<'info>,
pub vault_asset_idle_auth: AccountInfo<'info>,
pub user_asset_ata: AccountInfo<'info>,
pub asset_token_program: AccountInfo<'info>,
pub lp_token_program: AccountInfo<'info>,
pub system_program: AccountInfo<'info>,
pub voltr_vault_program: AccountInfo<'info>,
}
Implementation
use anchor_lang::prelude::*;
use anchor_lang::solana_program::{
account_info::AccountInfo,
instruction::{ AccountMeta, Instruction },
program::invoke,
};
impl<'info> InstantWithdrawVaultParams<'info> {
pub fn instant_withdraw_vault(
&self,
amount: u64,
is_amount_in_lp: bool,
is_withdraw_all: bool,
) -> Result<()> {
let mut instruction_data = get_instant_withdraw_vault_discriminator().to_vec();
instruction_data.extend_from_slice(&amount.to_le_bytes());
instruction_data.push(is_amount_in_lp as u8);
instruction_data.push(is_withdraw_all as u8);
let account_metas = vec![
AccountMeta::new_readonly(*self.user_transfer_authority.key, true),
AccountMeta::new_readonly(*self.protocol.key, false),
AccountMeta::new(*self.vault.key, false),
AccountMeta::new_readonly(*self.vault_asset_mint.key, false),
AccountMeta::new(*self.vault_lp_mint.key, false),
AccountMeta::new(*self.user_lp_ata.key, false),
AccountMeta::new(*self.vault_asset_idle_ata.key, false),
AccountMeta::new(*self.vault_asset_idle_auth.key, false),
AccountMeta::new(*self.user_asset_ata.key, false),
AccountMeta::new_readonly(*self.asset_token_program.key, false),
AccountMeta::new_readonly(*self.lp_token_program.key, false),
AccountMeta::new_readonly(*self.system_program.key, false),
];
let instruction = Instruction {
program_id: *self.voltr_vault_program.key,
accounts: account_metas,
data: instruction_data,
};
invoke(&instruction, &self.to_account_infos())
.map_err(|_| ErrorCodes::CpiToVoltrVaultFailed.into())
}
}
The instant_withdraw_vault instruction shares the same parameters as request_withdraw_vault but does not create a receipt account. The LP burn and asset transfer happen atomically in a single transaction. 
