Migrate loader to high-level instructions

sdk/src/loader_instruction.rs

@@ -1,3 +1,6 @@
+use crate::pubkey::Pubkey;
+use crate::transaction::{AccountMeta, Instruction};
+
 #[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
 pub enum LoaderInstruction {
     /// Write program data into an account
@@ -16,3 +19,24 @@ pub enum LoaderInstruction {
     /// The transaction must be signed by key[0]
     Finalize,
 }
+
+impl LoaderInstruction {
+    pub fn new_write(
+        account_id: &Pubkey,
+        program_id: &Pubkey,
+        offset: u32,
+        bytes: Vec<u8>,
+    ) -> Instruction {
+        let account_metas = vec![AccountMeta::new(*account_id, true)];
+        Instruction::new(
+            *program_id,
+            &LoaderInstruction::Write { offset, bytes },
+            account_metas,
+        )
+    }
+
+    pub fn new_finalize(account_id: &Pubkey, program_id: &Pubkey) -> Instruction {
+        let account_metas = vec![AccountMeta::new(*account_id, true)];
+        Instruction::new(*program_id, &LoaderInstruction::Finalize, account_metas)
+    }
+}