diff --git a/api/src/event.rs b/api/src/event.rs
index 7f0cfb4..a8be86d 100644
--- a/api/src/event.rs
+++ b/api/src/event.rs
@@ -195,7 +195,7 @@ pub struct DepositEvent {
     pub amount: u64,
 
     /// The total amount of ORE this user has deposited as collateral.
-    pub capacity: u64,
+    pub collateral: u64,
 
     /// The timestamp of the event.
     pub ts: i64,
@@ -217,7 +217,7 @@ pub struct WithdrawEvent {
     pub amount: u64,
 
     /// The total amount of ORE this user has deposited as collateral.
-    pub capacity: u64,
+    pub collateral: u64,
 
     /// The timestamp of the event.
     pub ts: i64,
diff --git a/api/src/state/block.rs b/api/src/state/block.rs
index edc0b32..78cf38e 100644
--- a/api/src/state/block.rs
+++ b/api/src/state/block.rs
@@ -26,7 +26,10 @@ pub struct Block {
     pub start_slot: u64,
 
     /// The total number of hashes submitted to the block.
-    pub total_hashes: u64,
+    pub total_committed: u64,
+
+    /// The total number of hashes deployed to the block.
+    pub total_deployed: u64,
 
     /// The total amount of rewards paid out to miners.
     pub total_rewards: u64,
diff --git a/api/src/state/miner.rs b/api/src/state/miner.rs
index e6558eb..eb52ed7 100644
--- a/api/src/state/miner.rs
+++ b/api/src/state/miner.rs
@@ -16,10 +16,13 @@ pub struct Miner {
     /// The hash of the last block this miner mined in.
     pub hash: [u8; 32],
 
-    /// The total number of hashes this miner has submitted.
-    pub total_hashes: u64,
+    /// The total number of hashes this miner has committed to the block.
+    pub total_committed: u64,
 
-    /// The amount of ORE this miner has mined.
+    /// The total number of hashes this miner has deployed to the block.
+    pub total_deployed: u64,
+
+    /// The total amount of ORE this miner has mined across all blocks.
     pub total_rewards: u64,
 }
 
diff --git a/api/src/state/permit.rs b/api/src/state/permit.rs
index 6ba9f09..a51bcc6 100644
--- a/api/src/state/permit.rs
+++ b/api/src/state/permit.rs
@@ -7,15 +7,15 @@ use super::OreAccount;
 #[repr(C)]
 #[derive(Clone, Copy, Debug, PartialEq, Pod, Zeroable)]
 pub struct Permit {
-    /// The amount of hash tokens this miner has committed to the block.
-    pub amount: u64,
-
     /// The authority of the miner account.
     pub authority: Pubkey,
 
     /// The ID of the block this permit is for.
     pub block_id: u64,
 
+    /// The amount of hash tokens this miner has committed to the block.
+    pub commitment: u64,
+
     /// The executor of the permit.
     pub executor: Pubkey,
 
diff --git a/api/src/state/stake.rs b/api/src/state/stake.rs
index 5d14cb2..c593cd3 100644
--- a/api/src/state/stake.rs
+++ b/api/src/state/stake.rs
@@ -13,11 +13,11 @@ pub struct Stake {
     /// The ID of the block this collateral is associated with.
     pub block_id: u64,
 
-    /// The amount of ORE this miner can commit to the block.
-    pub capacity: u64,
+    /// The amount of ORE this miner has deposited as collateral for trading.
+    pub collateral: u64,
 
-    /// The amount of ORE this miner has committed to the block.
-    pub utilization: u64,
+    /// The amount of ORE this miner has spent on hashpower in this market.
+    pub spend: u64,
 }
 
 impl Stake {
diff --git a/cli/src/main.rs b/cli/src/main.rs
index e2e6fa5..c5dcb06 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -148,7 +148,9 @@ fn print_block(block: Block, clock: &Clock) {
     println!("  Start slot: {:?}", block.start_slot);
     println!("  Starts in: {:?} sec", elapsed_time as u64);
     println!("  Slot hash: {:?}", block.slot_hash);
-    println!("  Total hashes: {:?}", block.total_hashes);
+    println!("  Total hashes: {:?}", block.total_committed);
+    println!("  Total deployed: {:?}", block.total_deployed);
+    println!("  Total rewards: {:?}", block.total_rewards);
     println!("  Lode reward: {:?}", block.reward.lode_reward);
     println!("  Lode authority: {:?}", block.reward.lode_authority);
     println!("  Lode hash: {:?}", block.reward.lode_hash);
diff --git a/program/src/commit.rs b/program/src/commit.rs
index b8f528d..c705a27 100644
--- a/program/src/commit.rs
+++ b/program/src/commit.rs
@@ -18,8 +18,8 @@ pub fn process_commit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResul
     };
     signer_info.is_signer()?;
     let block = block_info
-        .as_account::<Block>(&ore_api::ID)?
-        .assert(|b| clock.slot < b.start_slot)?;
+        .as_account_mut::<Block>(&ore_api::ID)?
+        .assert_mut(|b| clock.slot < b.start_slot)?;
     commitment_info.as_associated_token_account(block_info.key, mint_info.key)?;
     let market = market_info
         .as_account::<Market>(&ore_api::ID)?
@@ -35,7 +35,7 @@ pub fn process_commit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResul
     let amount = sender.amount().min(amount);
 
     // Load miner account.
-    let _miner = if miner_info.data_is_empty() {
+    let miner = if miner_info.data_is_empty() {
         create_program_account::<Miner>(
             miner_info,
             system_program,
@@ -47,7 +47,8 @@ pub fn process_commit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResul
         miner.authority = *signer_info.key;
         miner.block_id = 0;
         miner.hash = [0; 32];
-        miner.total_hashes = 0;
+        miner.total_committed = 0;
+        miner.total_deployed = 0;
         miner.total_rewards = 0;
         miner
     } else {
@@ -66,9 +67,12 @@ pub fn process_commit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResul
             &[PERMIT, &signer_info.key.to_bytes(), &block.id.to_le_bytes()],
         )?;
         let permit = permit_info.as_account_mut::<Permit>(&ore_api::ID)?;
-        permit.amount = 0;
         permit.authority = *signer_info.key;
         permit.block_id = block.id;
+        permit.commitment = 0;
+        permit.executor = Pubkey::default();
+        permit.fee = 0;
+        permit.seed = [0; 32];
         permit
     } else {
         permit_info
@@ -92,7 +96,9 @@ pub fn process_commit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResul
     )?;
 
     // Update block.
-    permit.amount += amount;
+    permit.commitment += amount;
+    miner.total_committed += amount;
+    block.total_committed += amount;
 
     // Emit event.
     CommitEvent {
@@ -100,7 +106,7 @@ pub fn process_commit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResul
         authority: *signer_info.key,
         block_id: block.id,
         amount,
-        commitment: permit.amount,
+        commitment: permit.commitment,
         ts: clock.unix_timestamp,
     }
     .log_return();
diff --git a/program/src/deposit.rs b/program/src/deposit.rs
index 568a538..f9cd4c9 100644
--- a/program/src/deposit.rs
+++ b/program/src/deposit.rs
@@ -41,8 +41,8 @@ pub fn process_deposit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResu
         let stake = stake_info.as_account_mut::<Stake>(&ore_api::ID)?;
         stake.authority = *signer_info.key;
         stake.block_id = block.id;
-        stake.capacity = 0;
-        stake.utilization = 0;
+        stake.collateral = 0;
+        stake.spend = 0;
         stake
     } else {
         stake_info
@@ -52,7 +52,7 @@ pub fn process_deposit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResu
     };
 
     // Update stake state.
-    stake.capacity += amount;
+    stake.collateral += amount;
 
     // Transfer collateral.
     transfer(
@@ -69,7 +69,7 @@ pub fn process_deposit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResu
         authority: *signer_info.key,
         block_id: block.id,
         amount,
-        capacity: stake.capacity,
+        collateral: stake.collateral,
         ts: clock.unix_timestamp,
     }
     .log_return();
diff --git a/program/src/mine.rs b/program/src/mine.rs
index dfbb659..1a5551e 100644
--- a/program/src/mine.rs
+++ b/program/src/mine.rs
@@ -50,8 +50,8 @@ pub fn process_mine(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult
     slot_hashes_sysvar.is_sysvar(&sysvar::slot_hashes::ID)?;
 
     // Reduce permit amount.
-    let amount = permit.amount.min(amount);
-    permit.amount -= amount;
+    let amount = permit.commitment.min(amount);
+    permit.commitment -= amount;
 
     // Pay executor fee.
     if permit.fee > 0 {
@@ -59,7 +59,7 @@ pub fn process_mine(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult
     }
 
     // Close permit account, if empty.
-    if permit.amount == 0 {
+    if permit.commitment == 0 {
         permit_info.close(authority_info)?;
     }
 
@@ -100,8 +100,8 @@ pub fn process_mine(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult
     let mut nugget_reward = 0;
     for _ in 0..amount {
         // Update stats
-        block.total_hashes += 1;
-        miner.total_hashes += 1;
+        block.total_deployed += 1;
+        miner.total_deployed += 1;
 
         // Generate hash.
         miner.hash = hash(miner.hash.as_ref());
diff --git a/program/src/open.rs b/program/src/open.rs
index c7a6f90..ce3ae61 100644
--- a/program/src/open.rs
+++ b/program/src/open.rs
@@ -78,7 +78,9 @@ pub fn process_open(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult
     };
     block.slot_hash = [0; 32];
     block.start_slot = start_slot;
-    block.total_hashes = 0;
+    block.total_committed = 0;
+    block.total_deployed = 0;
+    block.total_rewards = 0;
 
     // Select reward strategy.
     let noise_seed = block.id.to_le_bytes();
diff --git a/program/src/swap.rs b/program/src/swap.rs
index df6de56..4d781d2 100644
--- a/program/src/swap.rs
+++ b/program/src/swap.rs
@@ -105,16 +105,16 @@ pub fn process_swap(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResult
     match direction {
         SwapDirection::Buy => {
             // TODO Fail if out_amount is zero
-            stake.utilization += in_amount;
+            stake.spend += in_amount;
         }
         SwapDirection::Sell => {
-            stake.utilization = stake.utilization.saturating_sub(out_amount);
+            stake.spend = stake.spend.saturating_sub(out_amount);
         }
     }
 
     // Assert utilization is not greater than capacity.
-    if stake.utilization > stake.capacity {
-        panic!("utilization is greater than capacity");
+    if stake.spend > stake.collateral {
+        panic!("spend is greater than collateral");
     }
 
     // Transfer tokens.
diff --git a/program/src/uncommit.rs b/program/src/uncommit.rs
index 0e981b5..5cdd232 100644
--- a/program/src/uncommit.rs
+++ b/program/src/uncommit.rs
@@ -16,17 +16,17 @@ pub fn process_uncommit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRes
     };
     signer_info.is_signer()?;
     let block = block_info
-        .as_account::<Block>(&ore_api::ID)?
-        .assert(|b| clock.slot < b.start_slot)?;
+        .as_account_mut::<Block>(&ore_api::ID)?
+        .assert_mut(|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)?;
+    let miner = miner_info
+        .as_account_mut::<Miner>(&ore_api::ID)?
+        .assert_mut(|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)?
@@ -39,7 +39,7 @@ pub fn process_uncommit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRes
     token_program.is_program(&spl_token::ID)?;
 
     // Normalize amount.
-    let amount = permit.amount.min(amount);
+    let amount = permit.commitment.min(amount);
 
     // Transfer hash tokens.
     transfer_signed(
@@ -52,10 +52,12 @@ pub fn process_uncommit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRes
     )?;
 
     // Update block.
-    permit.amount -= amount;
+    permit.commitment -= amount;
+    miner.total_committed -= amount;
+    block.total_committed -= amount;
 
     // Close permit account, if empty.
-    if permit.amount == 0 {
+    if permit.commitment == 0 {
         permit_info.close(signer_info)?;
     }
 
@@ -64,7 +66,7 @@ pub fn process_uncommit(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRes
         disc: OreEvent::Uncommit as u64,
         authority: *signer_info.key,
         block_id: block.id,
-        commitment: permit.amount,
+        commitment: permit.commitment,
         amount,
         ts: clock.unix_timestamp,
     }
diff --git a/program/src/withdraw.rs b/program/src/withdraw.rs
index a51cf75..a2730e3 100644
--- a/program/src/withdraw.rs
+++ b/program/src/withdraw.rs
@@ -36,7 +36,7 @@ pub fn process_withdraw(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRes
     }
 
     // Update stake state.
-    stake.capacity -= amount;
+    stake.collateral -= amount;
 
     // Transfer collateral.
     transfer_signed(
@@ -49,7 +49,7 @@ pub fn process_withdraw(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRes
     )?;
 
     // Close stake account, if empty.
-    if stake.capacity == 0 {
+    if stake.collateral == 0 {
         stake_info.close(signer_info)?;
     }
 
@@ -59,7 +59,7 @@ pub fn process_withdraw(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRes
         authority: *signer_info.key,
         block_id: stake.block_id,
         amount,
-        capacity: stake.capacity,
+        collateral: stake.collateral,
         ts: clock.unix_timestamp,
     }
     .log_return();