diff --git a/Anchor.toml b/Anchor.toml
index 00eb8e8..351af0a 100644
--- a/Anchor.toml
+++ b/Anchor.toml
@@ -5,7 +5,7 @@ resolution = true
 skip-lint = false
 
 [programs.localnet]
-protocol_contracts_solana = "94U5AHQMKkV5txNJ17QPXWoh474PheGou6cNP2FEuL1d"
+protocol_contracts_solana = "ZETAjseVjuFsxdRxo6MmTCvqFwb3ZHUx56Co3vCmGis"
 
 [registry]
 url = "https://api.apr.dev"
diff --git a/README.md b/README.md
index 5f5b9dc..a026797 100644
--- a/README.md
+++ b/README.md
@@ -1,10 +1,15 @@
 
 # Introduction
 
+Mainnet-beta, testnet, devnet gateway program address: 
+```
+ZETAjseVjuFsxdRxo6MmTCvqFwb3ZHUx56Co3vCmGis
+```
+
 This repository hosts the smart contracts (program)
 on Solana network to support ZetaChain cross-chain
 functionality. Specifically, it consists of a single
-program deployed (to be deployed; show address here)
+program deployed
 which allows the following two actions: 
 
 1. Users on Solana network can send SOL or selected
diff --git a/programs/protocol-contracts-solana/src/lib.rs b/programs/protocol-contracts-solana/src/lib.rs
index 6b52dd2..b85a2cd 100644
--- a/programs/protocol-contracts-solana/src/lib.rs
+++ b/programs/protocol-contracts-solana/src/lib.rs
@@ -28,7 +28,7 @@ pub enum Errors {
     DepositPaused,
 }
 
-declare_id!("94U5AHQMKkV5txNJ17QPXWoh474PheGou6cNP2FEuL1d");
+declare_id!("ZETAjseVjuFsxdRxo6MmTCvqFwb3ZHUx56Co3vCmGis");
 
 #[program]
 pub mod gateway {
@@ -60,6 +60,7 @@ pub mod gateway {
         Ok(())
     }
 
+    // the authority stored in PDA can call this instruction to update tss address
     pub fn update_tss(ctx: Context<UpdateTss>, tss_address: [u8; 20]) -> Result<()> {
         let pda = &mut ctx.accounts.pda;
         require!(
@@ -70,6 +71,7 @@ pub mod gateway {
         Ok(())
     }
 
+    // the authority stored in PDA can call this instruction to update the authority address
     pub fn update_authority(
         ctx: Context<UpdateAuthority>,
         new_authority_address: Pubkey,
@@ -145,6 +147,7 @@ pub mod gateway {
         Ok(())
     }
 
+    // only tss address stored in PDA can call this instruction
     pub fn withdraw(
         ctx: Context<Withdraw>,
         amount: u64,
@@ -185,6 +188,7 @@ pub mod gateway {
         Ok(())
     }
 
+    // only tss address stored in PDA can call this instruction
     pub fn withdraw_spl_token(
         ctx: Context<WithdrawSPLToken>,
         amount: u64,