Initial population of solana-program-sdk

sdk/program/src/program.rs

@@ -0,0 +1,60 @@
+use crate::{account_info::AccountInfo, entrypoint::ProgramResult, 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: &[&[&[u8]]],
+) -> ProgramResult {
+    // Check that the account RefCells are consistent with the request
+    for account_meta in instruction.accounts.iter() {
+        for account_info in account_infos.iter() {
+            if account_meta.pubkey == *account_info.key {
+                if account_meta.is_writable {
+                    let _ = account_info.try_borrow_mut_lamports()?;
+                    let _ = account_info.try_borrow_mut_data()?;
+                } else {
+                    let _ = account_info.try_borrow_lamports()?;
+                    let _ = account_info.try_borrow_data()?;
+                }
+                break;
+            }
+        }
+    }
+
+    #[cfg(target_arch = "bpf")]
+    {
+        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 {
+            crate::entrypoint::SUCCESS => Ok(()),
+            _ => Err(result.into()),
+        }
+    }
+
+    #[cfg(not(target_arch = "bpf"))]
+    crate::program_stubs::sol_invoke_signed(instruction, account_infos, signers_seeds)
+}
+
+#[cfg(target_arch = "bpf")]
+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;
+}