scaffold

program/src/mine.rs

@@ -0,0 +1,49 @@
+use ore_api::prelude::*;
+use solana_program::keccak;
+use steel::*;
+
+/// Opens a new block for hashpower trading.
+pub fn process_mine(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult {
+    // Parse data.
+    let args = Mine::try_from_bytes(data)?;
+    let amount = u64::from_le_bytes(args.amount);
+
+    // Load accounts.
+    let clock = Clock::get()?;
+    let [signer_info, block_info, miner_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)?
+        .assert_mut(|b| clock.slot < b.start_slot + 1500)?;
+    let miner = miner_info
+        .as_account_mut::<Miner>(&ore_api::ID)?
+        .assert_mut(|m| m.authority == *signer_info.key)?;
+    system_program.is_program(&system_program::ID)?;
+    token_program.is_program(&spl_token::ID)?;
+
+    // TODO Open miner account if it doesn't exist.
+    // TODO Burn hash tokens
+
+    // Reset miner hash if mining new block.
+    if miner.block_id != block.id {
+        miner.block_id = block.id;
+        miner.hash =
+            keccak::hashv(&[block.slot_hash.as_ref(), miner.authority.as_ref()]).to_bytes();
+    }
+
+    for _ in 0..amount {
+        miner.hash = keccak::hashv(&[miner.hash.as_ref()]).to_bytes();
+        if miner.hash < block.best_hash {
+            block.best_hash = miner.hash;
+            block.best_miner = miner.authority;
+        }
+    }
+
+    // Update miner stats.
+    miner.total_hashes += amount;
+
+    Ok(())
+}