Add message

sdk/src/message.rs

@@ -0,0 +1,13 @@
+use crate::hash::Hash;
+use crate::instruction::CompiledInstruction;
+use crate::pubkey::Pubkey;
+
+#[derive(Debug, PartialEq, Eq, Clone)]
+pub struct Message {
+    pub num_signatures: u8,
+    pub account_keys: Vec<Pubkey>,
+    pub recent_blockhash: Hash,
+    pub fee: u64,
+    pub program_ids: Vec<Pubkey>,
+    pub instructions: Vec<CompiledInstruction>,
+}