Add Cross-program invocations (#9582)

sdk/src/program.rs

@@ -0,0 +1,42 @@
+#![cfg(feature = "program")]
+
+use crate::{
+    account_info::AccountInfo, entrypoint::ProgramResult, entrypoint::SUCCESS,
+    instruction::Instruction,
+};
+
+/// Invoke a cross-program instruction
+pub fn invoke(instruction: &Instruction, account_infos: &[AccountInfo]) -> ProgramResult {
+    invoke_signed(instruction, account_infos, &[])
+}
+
+/// Invoke a cross-program instruction with program signatures
+pub fn invoke_signed(
+    instruction: &Instruction,
+    account_infos: &[AccountInfo],
+    signers_seeds: &[&[&str]],
+) -> ProgramResult {
+    let result = unsafe {
+        sol_invoke_signed_rust(
+            instruction as *const _ as *const u8,
+            account_infos as *const _ as *const u8,
+            account_infos.len() as u64,
+            signers_seeds as *const _ as *const u8,
+            signers_seeds.len() as u64,
+        )
+    };
+    match result {
+        SUCCESS => Ok(()),
+        _ => Err(result.into()),
+    }
+}
+
+extern "C" {
+    fn sol_invoke_signed_rust(
+        instruction_addr: *const u8,
+        account_infos_addr: *const u8,
+        account_infos_len: u64,
+        signers_seeds_addr: *const u8,
+        signers_seeds_len: u64,
+    ) -> u64;
+}