Add anchor accounts for PostMessage instruction.

Change-Id: I26d054479b95d9e33c8da4f8b6fca630240ffb3f

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

@@ -13,4 +13,3 @@ pub fn publish_message(
 ) -> ProgramResult {
     Ok(())
 }
-

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

@@ -22,6 +22,21 @@ struct SecpInstructionPart<'a> {
     msg_size: u16,
 }
 
+#[inline(always)]
+fn filter_empty_signatures(signers: &[i8; MAX_LEN_GUARDIAN_KEYS]) -> Vec<SigInfo> {
+    signers
+        .iter()
+        .enumerate()
+        .filter_map(|(i, p)| match *p {
+            -1 => None,
+            ix => Some(SigInfo {
+                sig_index: ix as u8,
+                signer_index: i as u8,
+            }),
+        })
+        .collect()
+}
+
 pub fn verify_signatures(
     bridge: &mut Bridge,
     ctx: Context<VerifySig>,
@@ -29,20 +44,7 @@ pub fn verify_signatures(
     signers: [i8; MAX_LEN_GUARDIAN_KEYS],
     initial_creation: bool,
 ) -> ProgramResult {
-    let sig_infos: Vec<SigInfo> = signers
-        .iter()
-        .enumerate()
-        .filter_map(|(i, p)| {
-            if *p == -1 {
-                return None;
-            }
-
-            return Some(SigInfo {
-                sig_index: *p as u8,
-                signer_index: i as u8,
-            });
-        })
-        .collect();
+    let sig_infos = filter_empty_signatures(&signers);
 
     // We check this manually because the type-level checks are
     // not available for Instructions yet. See the VerifySig

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

@@ -70,7 +70,32 @@ pub struct InitializeData {
 }
 
 #[derive(Accounts)]
-pub struct PublishMessage {}
+pub struct PublishMessage<'info> {
+    /// Clock used for timestamping.
+    pub clock: Sysvar<'info, Clock>,
+
+    /// Instructions used for transaction reflection.
+    pub instructions: AccountInfo<'info>,
+
+    /// Derived account verified to match the expected pubkey via Bridge::check_and_create_account.
+    #[account(init)]
+    pub message: AccountInfo<'info>,
+
+    /// No need to verify - only used as the fee payer for account creation.
+    #[account(signer)]
+    pub payer: AccountInfo<'info>,
+
+    /// The emitter, only used as metadata. We verify that the account is a signer to prevent
+    /// messages from being spoofed.
+    #[account(signer)]
+    pub emitter: AccountInfo<'info>,
+
+    /// 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 PublishMessageData {}