Initial population of solana-program-sdk

sdk/program/src/loader_instruction.rs

@@ -0,0 +1,53 @@
+use crate::{
+    instruction::{AccountMeta, Instruction},
+    pubkey::Pubkey,
+    sysvar::rent,
+};
+
+#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
+pub enum LoaderInstruction {
+    /// Write program data into an account
+    ///
+    /// # Account references
+    ///   0. [WRITE, SIGNER] Account to write to
+    Write {
+        /// Offset at which to write the given bytes
+        offset: u32,
+
+        /// Serialized program data
+        #[serde(with = "serde_bytes")]
+        bytes: Vec<u8>,
+    },
+
+    /// Finalize an account loaded with program data for execution
+    ///
+    /// The exact preparation steps is loader specific but on success the loader must set the executable
+    /// bit of the account.
+    ///
+    /// # Account references
+    ///   0. [WRITE, SIGNER] The account to prepare for execution
+    ///   1. [] Rent sysvar
+    Finalize,
+}
+
+pub fn write(
+    account_pubkey: &Pubkey,
+    program_id: &Pubkey,
+    offset: u32,
+    bytes: Vec<u8>,
+) -> Instruction {
+    let account_metas = vec![AccountMeta::new(*account_pubkey, true)];
+    Instruction::new(
+        *program_id,
+        &LoaderInstruction::Write { offset, bytes },
+        account_metas,
+    )
+}
+
+pub fn finalize(account_pubkey: &Pubkey, program_id: &Pubkey) -> Instruction {
+    let account_metas = vec![
+        AccountMeta::new(*account_pubkey, true),
+        AccountMeta::new(rent::id(), false),
+    ];
+    Instruction::new(*program_id, &LoaderInstruction::Finalize, account_metas)
+}