update solution

program/src/initialize.rs

@@ -50,7 +50,10 @@ pub fn process_initialize(accounts: &[AccountInfo<'_>], _data: &[u8]) -> Program
     let config = config_info.as_account_mut::<Config>(&ore_api::ID)?;
     // config.base_reward_rate = INITIAL_BASE_REWARD_RATE;
     config.last_reset_at = 0;
-    // config.min_difficulty = INITIAL_MIN_DIFFICULTY as u64;
+    config.best_hash = [u8::MAX; 32];
+    config.best_proof = Pubkey::default();
+    config.challenge = [0; 32];
+    config.block_reward = 0;
 
     // Initialize treasury.
     create_program_account::<Treasury>(

program/src/mine.rs

@@ -1,4 +1,3 @@
-use drillx::difficulty;
 use ore_api::prelude::*;
 use solana_program::hash;
 use steel::*;
@@ -35,12 +34,9 @@ pub fn process_mine(accounts: &[AccountInfo], data: &[u8]) -> ProgramResult {
         proof.authority.to_bytes().as_slice(),
     ]);
 
-    // Get the difficulty score.
-    let difficulty = difficulty(solution.to_bytes());
-
     // Update the best solution.
-    if difficulty as u64 > config.best_difficulty {
-        config.best_difficulty = difficulty as u64;
+    if solution.to_bytes() < config.best_hash {
+        config.best_hash = solution.to_bytes();
         config.best_proof = *proof_info.key;
     }
 

program/src/reset.rs

@@ -1,3 +1,4 @@
+use drillx::difficulty;
 use ore_api::prelude::*;
 use ore_boost_api::state::Config as BoostConfig;
 use solana_program::{hash::hashv, slot_hashes::SlotHash};
@@ -47,17 +48,22 @@ pub fn process_reset(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResul
         return Ok(());
     }
 
-    // Process epoch.
-    config.block_reward = get_block_reward(mint.supply());
-    config.best_proof = Pubkey::default();
-    config.best_difficulty = 0;
-    config.last_reset_at = clock.unix_timestamp;
+    // Record difficulty.
+    let difficulty = difficulty(config.best_hash) as u64;
+
+    // Reset the challenge.
     config.challenge = hashv(&[
         config.challenge.as_slice(),
         &slot_hashes_sysvar.data.borrow()[0..size_of::<SlotHash>()],
     ])
     .to_bytes();
 
+    // Reset the config.
+    config.block_reward = get_block_reward(mint.supply());
+    config.best_proof = Pubkey::default();
+    config.best_hash = [u8::MAX; 32];
+    config.last_reset_at = clock.unix_timestamp;
+
     // Calculate boost reward.
     let take_rate = boost_config.take_rate.min(9900); // Cap at 99%
     let boost_reward = config.block_reward * take_rate / ore_boost_api::consts::DENOMINATOR_BPS;
@@ -77,6 +83,19 @@ pub fn process_reset(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResul
         &[TREASURY],
     )?;
 
+    // Emit event.
+    MineEvent {
+        balance: proof.balance,
+        difficulty,
+        last_hash_at: 0,
+        timing: 0,
+        net_reward: config.block_reward,
+        net_base_reward: miner_reward,
+        net_miner_boost_reward: boost_reward,
+        net_staker_boost_reward: 0,
+    }
+    .log_return();
+
     Ok(())
 }