diff --git a/programs/bets/src/error.rs b/programs/bets/src/error.rs
index ef4aef7..2202edb 100644
--- a/programs/bets/src/error.rs
+++ b/programs/bets/src/error.rs
@@ -11,4 +11,10 @@ pub enum ErrorCode {
 pub enum BettingError {
     #[msg("Bet is not filled yet!")]
     BetNotFilled,
+}
+
+#[error_code]
+pub enum BetError {
+    #[msg("The winner must be either the owner or the joiner of the bet.")]
+    InvalidWinner,
 }
\ No newline at end of file
diff --git a/programs/bets/src/instructions/close_bet.rs b/programs/bets/src/instructions/close_bet.rs
new file mode 100644
index 0000000..4338799
--- /dev/null
+++ b/programs/bets/src/instructions/close_bet.rs
@@ -0,0 +1,36 @@
+use anchor_lang::prelude::*;
+use crate::{error::BetError, *};
+
+pub fn close(ctx: Context<CloseBet>, winner:Pubkey)->Result<()>{
+    let bet_vault = &mut ctx.accounts.bet_vault;
+    require!(
+        bet_vault.owner == winner || bet_vault.joiner == winner,
+        BetError::InvalidWinner
+    );
+
+    let bets_list = &mut ctx.accounts.bets_list;
+    // Remove the bet_vault public key from the list
+    bets_list.bets.retain(|&bet| bet != bet_vault.key());
+
+    msg!("Bet {} closed by {}", bet_vault.key(), winner);
+
+    
+    Ok(())
+}
+
+
+#[derive(Accounts)]
+pub struct CloseBet<'info>{
+    #[account(mut)]
+    pub bets_list: Account<'info, BetsList>,
+
+    #[account(mut, close=winner)]
+    pub bet_vault: Account<'info, BetVault>,
+
+    #[account(mut)]
+    pub winner: SystemAccount<'info>,
+
+    #[account(mut)]
+    pub payer: Signer<'info>,
+    pub system_program: Program<'info, System>
+}
\ No newline at end of file
diff --git a/programs/bets/src/instructions/join_bet.rs b/programs/bets/src/instructions/join_bet.rs
index c9755e5..c1a67b4 100644
--- a/programs/bets/src/instructions/join_bet.rs
+++ b/programs/bets/src/instructions/join_bet.rs
@@ -24,6 +24,7 @@ pub fn join(ctx: Context<JoinBet>, _game_id:String) ->Result<()>{
 
     msg!("Joined bet {}!", bet_vault.key());
     Ok(())
+    
 }
 
 #[derive(Accounts)]
diff --git a/programs/bets/src/instructions/mod.rs b/programs/bets/src/instructions/mod.rs
index 48aa8c3..29cd29f 100644
--- a/programs/bets/src/instructions/mod.rs
+++ b/programs/bets/src/instructions/mod.rs
@@ -5,4 +5,7 @@ pub mod create_bet;
 pub use create_bet::*;
 
 pub mod join_bet;
-pub use join_bet::*;
\ No newline at end of file
+pub use join_bet::*;
+
+pub mod close_bet;
+pub use close_bet::*;
\ No newline at end of file
diff --git a/programs/bets/src/lib.rs b/programs/bets/src/lib.rs
index b6652a9..a8b0a34 100644
--- a/programs/bets/src/lib.rs
+++ b/programs/bets/src/lib.rs
@@ -19,15 +19,15 @@ pub mod bets {
         initialize_bets_list::init(ctx)
     }
 
-    pub fn create_bet(ctx: Context<CreateBet>,  wager:u64, game_id:String)-> Result<()>{
-        let clock = Clock::get().unwrap();
-        let seed = clock.unix_timestamp as u64; 
-        let nonce = seed % 100000;
-        
+    pub fn create_bet(ctx: Context<CreateBet>,  wager:u64, game_id:String, nonce:u64)-> Result<()>{
         create_bet::create(ctx, wager,game_id,nonce)
     }
 
     pub fn join_bet(ctx: Context<JoinBet>, game_id:String) -> Result<()>{
         join_bet::join(ctx, game_id)
     }
+
+    pub fn close_bet(ctx:Context<CloseBet>, winner:Pubkey)->Result<()> {
+        close_bet::close(ctx, winner)
+    }
 }