uncommit

program/src/uncommit.rs

@@ -0,0 +1,64 @@
+use ore_api::prelude::*;
+use steel::*;
+
+/// Uncommit from a block.
+pub fn process_uncommit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult {
+    // Parse data.
+    let args = Uncommit::try_from_bytes(data)?;
+    let amount = u64::from_le_bytes(args.amount);
+
+    // Load accounts.
+    let clock = Clock::get()?;
+    let [signer_info, block_info, commitment_info, market_info, miner_info, mint_info, permit_info, recipient_info, system_program, token_program, slot_hashes_sysvar] =
+        accounts
+    else {
+        return Err(ProgramError::NotEnoughAccountKeys);
+    };
+    signer_info.is_signer()?;
+    let block = block_info
+        .as_account::<Block>(&ore_api::ID)?
+        .assert(|b| clock.slot < b.start_slot)?;
+    commitment_info
+        .is_writable()?
+        .as_associated_token_account(block_info.key, mint_info.key)?;
+    let market = market_info
+        .as_account::<Market>(&ore_api::ID)?
+        .assert(|m| m.id == block.id)?;
+    miner_info
+        .as_account::<Miner>(&ore_api::ID)?
+        .assert(|m| m.authority == *signer_info.key)?;
+    mint_info.has_address(&market.base.mint)?.as_mint()?;
+    let permit = permit_info
+        .as_account_mut::<Permit>(&ore_api::ID)?
+        .assert_mut(|p| p.authority == *signer_info.key)?
+        .assert_mut(|p| p.block_id == block.id)?;
+    recipient_info
+        .is_writable()?
+        .as_associated_token_account(signer_info.key, &mint_info.key)?;
+    system_program.is_program(&system_program::ID)?;
+    token_program.is_program(&spl_token::ID)?;
+    slot_hashes_sysvar.is_sysvar(&sysvar::slot_hashes::ID)?;
+
+    // Normalize amount.
+    let amount = permit.amount.min(amount);
+
+    // Transfer hash tokens.
+    transfer_signed(
+        block_info,
+        commitment_info,
+        recipient_info,
+        token_program,
+        amount,
+        &[BLOCK, &block.id.to_le_bytes()],
+    )?;
+
+    // Update block.
+    permit.amount -= amount;
+
+    // Close permit account, if empty.
+    if permit.amount == 0 {
+        permit_info.close(signer_info)?;
+    }
+
+    Ok(())
+}