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diff --git a/solana/anchor-bridge/programs/anchor-bridge/src/lib.rs b/solana/anchor-bridge/programs/anchor-bridge/src/lib.rs
index 7a157c87..53dc2c56 100644
--- a/solana/anchor-bridge/programs/anchor-bridge/src/lib.rs
+++ b/solana/anchor-bridge/programs/anchor-bridge/src/lib.rs
@@ -1,12 +1,33 @@
 use anchor_lang::prelude::*;
 
+#[derive(Accounts)]
+pub struct VerifySig<'info> {
+    bridge: AccountInfo<'info>,
+    system: AccountInfo<'info>,
+    instruction_sysvar: AccountInfo<'info>,
+    bridge_info: AccountInfo<'info>,
+    sig_info: AccountInfo<'info>,
+    guardian_set_info: AccountInfo<'info>,
+    payer_info: AccountInfo<'info>,
+}
+
+pub const MAX_LEN_GUARDIAN_KEYS: usize = 20;
+
+#[derive(AnchorSerialize, AnchorDeserialize, Clone, Copy, Debug)]
+pub struct VerifySigsData {
+    /// hash of the VAA
+    pub hash: [u8; 32],
+    /// instruction indices of signers (-1 for missing)
+    pub signers: [i8; MAX_LEN_GUARDIAN_KEYS],
+    /// indicates whether this verification should only succeed if the sig account does not exist
+    pub initial_creation: bool,
+}
+
 #[program]
 pub mod anchor_bridge {
     use super::*;
-    pub fn initialize(ctx: Context<Initialize>) -> ProgramResult {
+
+    pub fn verify_signatures(_ctx: Context<VerifySig>, _data: VerifySigsData) -> ProgramResult {
         Ok(())
     }
 }
-
-#[derive(Accounts)]
-pub struct Initialize {}
\ No newline at end of file