Implement Initialize using correct anchor decorators.

Change-Id: I5d7120f927cc0e4a9dc2882b245058fde0a65637

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

@@ -1,7 +1,20 @@
 use anchor_lang::{prelude::*, solana_program};
 
+use crate::{types::Version, MAX_LEN_GUARDIAN_KEYS};
+
 #[account]
 pub struct BridgeInfo {}
 
 #[account]
-pub struct GuardianSetInfo {}
+pub struct GuardianSetInfo {
+    /// Version number of this guardian set.
+    pub version: Version,
+    /// Number of keys stored
+    pub len_keys: u8,
+    /// public key hashes of the guardian set
+    pub keys: [[u8; 20]; MAX_LEN_GUARDIAN_KEYS],
+    /// creation time
+    pub creation_time: u32,
+    /// expiration time when VAAs issued by this set are no longer valid
+    pub expiration_time: u32,
+}

solana/anchor-bridge/programs/anchor-bridge/src/api/initialize.rs

@@ -13,8 +13,17 @@ pub fn initialize(
     initial_guardian_key: [[u8; 20]; MAX_LEN_GUARDIAN_KEYS],
     config: BridgeConfig,
 ) -> Result<Bridge, ProgramError> {
+    let version = Version(0);
+
+    // Initialize the Guardian Set for the first time.
+    ctx.accounts.guardian_set.version = version;
+    ctx.accounts.guardian_set.creation_time = ctx.accounts.clock.unix_timestamp as u32;
+    ctx.accounts.guardian_set.keys = initial_guardian_key;
+    ctx.accounts.guardian_set.len_keys = len_guardians;
+
+    // Generate a Version 0 state for the bridges genesis.
     Ok(Bridge {
-        guardian_set_version: Version(0),
+        guardian_set_version: version,
         config,
     })
 }

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

@@ -50,7 +50,8 @@ pub struct Initialize<'info> {
     pub clock: Sysvar<'info, Clock>,
 
     /// Information about the current guardian set.
-    pub guardian_set: ProgramState<'info, GuardianSetInfo>,
+    #[account(init)]
+    pub guardian_set: ProgramAccount<'info, GuardianSetInfo>,
 
     /// Required by Anchor for associated accounts.
     pub rent: Sysvar<'info, Rent>,