close event

README.md

@@ -38,3 +38,5 @@ For line coverage, use llvm-cov:
 ```
 cargo llvm-cov
 ```
+
+Congrats on the child. That's great news. 

api/src/event.rs

@@ -97,6 +97,25 @@ pub struct OpenEvent {
     pub ts: i64,
 }
 
+#[repr(C)]
+#[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
+pub struct CloseEvent {
+    /// The authority of the close transaction.
+    pub authority: Pubkey,
+
+    /// The id of the block.
+    pub id: u64,
+
+    /// The amount of base (hashpower) liquidity burned.
+    pub burned_base: u64,
+
+    /// The amount of quote (ORE) liquidity burned.
+    pub burned_quote: u64,
+
+    /// The timestamp of the event.
+    pub ts: i64,
+}
+
 #[repr(C)]
 #[derive(Clone, Copy, Debug, Default, PartialEq, Pod, Zeroable)]
 pub struct CommitEvent {
@@ -180,3 +199,4 @@ event!(CommitEvent);
 event!(DepositEvent);
 event!(WithdrawEvent);
 event!(UncommitEvent);
+event!(CloseEvent);

program/src/close.rs

@@ -82,22 +82,24 @@ pub fn process_close(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResul
     }
 
     // Burn base liquidity.
+    let base_burned = vault_base.amount();
     burn_signed(
         vault_base_info,
         mint_base_info,
         market_info,
         token_program,
-        vault_base.amount(),
+        base_burned,
         &[MARKET, &market.id.to_le_bytes()],
     )?;
 
     // Burn quote liquidity.
+    let quote_burned = vault_quote.amount();
     burn_signed(
         vault_quote_info,
         mint_quote_info,
         market_info,
         token_program,
-        vault_quote.amount(),
+        quote_burned,
         &[MARKET, &market.id.to_le_bytes()],
     )?;
 
@@ -107,5 +109,15 @@ pub fn process_close(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResul
     // Close market.
     market_info.close(signer_info)?;
 
+    // Emit event.
+    CloseEvent {
+        authority: *signer_info.key,
+        id: block.id,
+        burned_base: base_burned,
+        burned_quote: quote_burned,
+        ts: clock.unix_timestamp,
+    }
+    .log_return();
+
     Ok(())
 }