Add bridge state to Anchor

Change-Id: I3ce0591d6810daf5fe8bd33f5bfd8d5297c0c9b5

solana/anchor-bridge/programs/anchor-bridge/src/lib.rs

@@ -57,6 +57,12 @@ pub struct InitializeData {
 pub mod anchor_bridge {
     use super::*;
 
+    #[state]
+    pub struct Bridge {
+        pub guardian_set_version: types::Version,
+        pub config: types::BridgeConfig,
+    }
+
     pub fn initialize(ctx: Context<Initialize>, data: InitializeData) -> ProgramResult {
         api::initialize(
             ctx,

solana/anchor-bridge/programs/anchor-bridge/src/types.rs

@@ -1,5 +1,9 @@
 use anchor_lang::prelude::*;
 
+// Distinguishes a Version number from a standard u32.
+#[derive(AnchorSerialize, AnchorDeserialize, Clone, Copy, Debug)]
+pub struct Version(u32);
+
 #[repr(C)]
 #[derive(AnchorSerialize, AnchorDeserialize, Clone, Copy, Debug)]
 pub struct BridgeConfig {