Use Anchor state for Initialize

Change-Id: I4f61c3e74e037e873f669f240ebbc8fe26567103

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

@@ -1,11 +1,20 @@
-use crate::{accounts, types::BridgeConfig, Initialize, InitializeData, MAX_LEN_GUARDIAN_KEYS};
 use anchor_lang::{prelude::*, solana_program};
 
+use crate::{
+    accounts,
+    anchor_bridge::Bridge,
+    types::{BridgeConfig, Version},
+    Initialize, InitializeData, MAX_LEN_GUARDIAN_KEYS,
+};
+
 pub fn initialize(
     ctx: Context<Initialize>,
     len_guardians: u8,
     initial_guardian_key: [[u8; 20]; MAX_LEN_GUARDIAN_KEYS],
     config: BridgeConfig,
-) -> ProgramResult {
-    Ok(())
+) -> Result<Bridge, ProgramError> {
+    Ok(Bridge {
+        guardian_set_version: Version(0),
+        config,
+    })
 }

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

@@ -1,5 +1,6 @@
-use crate::{accounts, VerifySig, VerifySigsData};
 use anchor_lang::{prelude::*, solana_program};
+
+use crate::{accounts, VerifySig, VerifySigsData};
 use byteorder::ByteOrder;
 use sha3::Digest;
 use std::io::Write;

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

@@ -41,7 +41,23 @@ pub struct VerifySigsData {
 }
 
 #[derive(Accounts)]
-pub struct Initialize {}
+pub struct Initialize<'info> {
+    /// Account used to pay for auxillary instructions.
+    #[account(signer)]
+    pub payer: AccountInfo<'info>,
+
+    /// Used for timestamping actions.
+    pub clock: Sysvar<'info, Clock>,
+
+    /// Information about the current guardian set.
+    pub guardian_set: ProgramState<'info, GuardianSetInfo>,
+
+    /// Required by Anchor for associated accounts.
+    pub rent: Sysvar<'info, Rent>,
+
+    /// Required by Anchor for associated accounts.
+    pub system_program: AccountInfo<'info>,
+}
 
 #[derive(AnchorSerialize, AnchorDeserialize, Clone, Copy, Debug)]
 pub struct InitializeData {
@@ -63,13 +79,15 @@ pub mod anchor_bridge {
         pub config: types::BridgeConfig,
     }
 
-    pub fn initialize(ctx: Context<Initialize>, data: InitializeData) -> ProgramResult {
-        api::initialize(
-            ctx,
-            data.len_guardians,
-            data.initial_guardian_keys,
-            data.config,
-        )
+    impl Bridge {
+        pub fn new(ctx: Context<Initialize>, data: InitializeData) -> Result<Self, ProgramError> {
+            api::initialize(
+                ctx,
+                data.len_guardians,
+                data.initial_guardian_keys,
+                data.config,
+            )
+        }
     }
 
     pub fn verify_signatures(ctx: Context<VerifySig>, data: VerifySigsData) -> ProgramResult {

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

@@ -2,7 +2,7 @@ use anchor_lang::prelude::*;
 
 // Distinguishes a Version number from a standard u32.
 #[derive(AnchorSerialize, AnchorDeserialize, Clone, Copy, Debug)]
-pub struct Version(u32);
+pub struct Version(pub u32);
 
 #[repr(C)]
 #[derive(AnchorSerialize, AnchorDeserialize, Clone, Copy, Debug)]