scaffolding

program/src/close.rs

@@ -0,0 +1,69 @@
+use ore_api::prelude::*;
+use steel::*;
+
+/// Closes a block.
+pub fn process_close(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResult {
+    // Load accounts.
+    let clock = Clock::get()?;
+    let [signer_info, block_info, market_info, market_hash_info, market_ore_info, mint_hash_info, mint_ore_info, recipient_info, treasury_info, system_program, token_program] =
+        accounts
+    else {
+        return Err(ProgramError::NotEnoughAccountKeys);
+    };
+    signer_info.is_signer()?;
+    let block = block_info
+        .as_account_mut::<Block>(&ore_api::ID)?
+        .assert_mut(|b| clock.slot >= b.start_slot + 1500)?;
+    let market = market_info
+        .as_account_mut::<Market>(&ore_api::ID)?
+        .assert_mut(|m| m.id == block.id)?;
+    let market_hash =
+        market_hash_info.as_associated_token_account(market_info.key, mint_hash_info.key)?;
+    let market_ore =
+        market_ore_info.as_associated_token_account(market_info.key, mint_ore_info.key)?;
+    mint_hash_info.has_address(&market.mint)?;
+    mint_ore_info.has_address(&MINT_ADDRESS)?;
+    system_program.is_program(&system_program::ID)?;
+    token_program.is_program(&spl_token::ID)?;
+
+    // Payout block reward.
+    if block.best_miner != Pubkey::default() {
+        recipient_info.as_associated_token_account(&block.best_miner, &MINT_ADDRESS)?;
+        mint_to_signed(
+            mint_ore_info,
+            recipient_info,
+            treasury_info,
+            token_program,
+            block.reward,
+            &[TREASURY],
+        )?;
+    }
+
+    // Burn hash tokens.
+    burn_signed(
+        market_hash_info,
+        mint_hash_info,
+        market_info,
+        token_program,
+        market_hash.amount(),
+        &[MARKET, &market.id.to_le_bytes()],
+    )?;
+
+    // Burn ORE liquidity.
+    burn_signed(
+        market_ore_info,
+        mint_ore_info,
+        market_info,
+        token_program,
+        market_ore.amount(),
+        &[MARKET, &market.id.to_le_bytes()],
+    )?;
+
+    // Close block.
+    block_info.close(signer_info)?;
+
+    // Close market.
+    market_info.close(signer_info)?;
+
+    Ok(())
+}