burn if no payout

api/src/sdk.rs

@@ -114,6 +114,7 @@ pub fn payout(signer: Pubkey, wager: Pubkey, recipient: Pubkey) -> Instruction {
         accounts: vec![
             AccountMeta::new(signer, true),
             AccountMeta::new(block, false),
+            AccountMeta::new(MINT_ADDRESS, false),
             AccountMeta::new(wager, false),
             AccountMeta::new(recipient, false),
             AccountMeta::new(TREASURY_ADDRESS, false),

program/src/payout.rs

@@ -7,7 +7,7 @@ use sysvar::slot_hashes::SlotHashes;
 pub fn process_payout(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResult {
     // Load accounts.
     let clock = Clock::get()?;
-    let [signer_info, block_info, wager_info, recipient_info, treasury_info, treasury_tokens_info, system_program, token_program, slot_hashes_sysvar] =
+    let [signer_info, block_info, mint_info, wager_info, recipient_info, treasury_info, treasury_tokens_info, system_program, token_program, slot_hashes_sysvar] =
         accounts
     else {
         return Err(ProgramError::NotEnoughAccountKeys);
@@ -17,6 +17,10 @@ pub fn process_payout(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResu
         .as_account_mut::<Block>(&ore_api::ID)?
         .assert_mut(|b| b.ends_at <= clock.slot)?
         .assert_mut(|b| b.paid == 0)?;
+    mint_info
+        .is_writable()?
+        .has_address(&MINT_ADDRESS)?
+        .as_mint()?;
     treasury_info.has_address(&TREASURY_ADDRESS)?;
     treasury_tokens_info
         .has_address(&TREASURY_TOKENS_ADDRESS)?
@@ -30,6 +34,14 @@ pub fn process_payout(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResu
 
     // Skip payout if no bets were placed.
     if block.cumulative_sum == 0 || block.reward == 0 {
+        burn_signed(
+            &treasury_tokens_info,
+            &mint_info,
+            &treasury_info,
+            &token_program,
+            block.reward,
+            &[TREASURY],
+        )?;
         return Ok(());
     }
 
@@ -39,6 +51,14 @@ pub fn process_payout(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResu
     let Some(slot_hash) = slot_hashes.get(&block.ends_at) else {
         // If payout is not called within 2.5 minutes of the block ending,
         // then the slot hash will be unavailable and the winning wager cannot be determined.
+        burn_signed(
+            &treasury_tokens_info,
+            &mint_info,
+            &treasury_info,
+            &token_program,
+            block.reward,
+            &[TREASURY],
+        )?;
         return Ok(());
     };
     block.noise = hashv(&[&block.noise, slot_hash.as_ref()]).to_bytes();