Struct CreateAccountAllowPrefund 

pub struct CreateAccountAllowPrefund<'a, 'b> {
    pub to: &'a AccountView<'a>,
    pub funding: Option<(&'a AccountView<'a>, u64)>,
    pub space: u64,
    pub owner: &'b Address,
}

Builder for the system program’s CreateAccountAllowPrefund instruction (tag 13).

Unlike CreateAccount, the target may already hold lamports: the System Program allocates, assigns, and then transfers lamports from the funding account as a delta on top of the existing balance, so callers pass required.saturating_sub(current). The account order is [to, from], the reverse of CreateAccount. A funding account is sent whenever one is given, even with a zero delta (the System Program checks for one account and ignores the second then), so hopper_init!, which always names the payer, links one CPI body instead of a funded and a pre-funded copy (1.4 KiB of .text per program, measured 2026-09-21); from is left out only when funding is None. to must sign (or be a PDA in signers) and must be System-owned with no data. The feature gate is active on mainnet-beta, devnet, and testnet; the System Program rejects the tag with InvalidInstructionData where it is not.

Fields

to: &'a AccountView<'a>

funding: Option<(&'a AccountView<'a>, u64)>

Funding account and lamport delta. None omits the payer from the instruction; a zero delta keeps it (ignored by the System Program).

space: u64

owner: &'b Address

Implementations

impl CreateAccountAllowPrefund<'_, '_>

pub fn invoke(&self) -> ProgramResult

pub fn invoke_signed(&self, signers: &[Signer<'_, '_>]) -> ProgramResult