58 lines
1.6 KiB
Rust
58 lines
1.6 KiB
Rust
//! Instructions for the [non-upgradable BPF loader][nubpfl].
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//!
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//! [nubpfl]: crate::bpf_loader
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use crate::{
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instruction::{AccountMeta, Instruction},
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pubkey::Pubkey,
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sysvar::rent,
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};
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#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
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pub enum LoaderInstruction {
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/// Write program data into an account
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///
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/// # Account references
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/// 0. [WRITE, SIGNER] Account to write to
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Write {
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/// Offset at which to write the given bytes
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offset: u32,
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/// Serialized program data
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#[serde(with = "serde_bytes")]
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bytes: Vec<u8>,
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},
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/// Finalize an account loaded with program data for execution
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///
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/// The exact preparation steps is loader specific but on success the loader must set the executable
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/// bit of the account.
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///
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/// # Account references
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/// 0. [WRITE, SIGNER] The account to prepare for execution
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/// 1. [] Rent sysvar
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Finalize,
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}
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pub fn write(
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account_pubkey: &Pubkey,
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program_id: &Pubkey,
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offset: u32,
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bytes: Vec<u8>,
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) -> Instruction {
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let account_metas = vec![AccountMeta::new(*account_pubkey, true)];
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Instruction::new_with_bincode(
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*program_id,
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&LoaderInstruction::Write { offset, bytes },
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account_metas,
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)
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}
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pub fn finalize(account_pubkey: &Pubkey, program_id: &Pubkey) -> Instruction {
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let account_metas = vec![
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AccountMeta::new(*account_pubkey, true),
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AccountMeta::new_readonly(rent::id(), false),
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];
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Instruction::new_with_bincode(*program_id, &LoaderInstruction::Finalize, account_metas)
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}
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