diff --git a/api/src/sdk.rs b/api/src/sdk.rs
index 2445e67..492d6b1 100644
--- a/api/src/sdk.rs
+++ b/api/src/sdk.rs
@@ -307,6 +307,28 @@ pub fn reset(
         data: Reset {}.to_bytes(),
     }
 }
+// let [signer_info, automation_info, board_info, miner_info, round_info, treasury_info, system_program] =
+
+pub fn checkpoint(signer: Pubkey, authority: Pubkey, round_id: u64) -> Instruction {
+    let miner_address = miner_pda(authority).0;
+    let automation_address = automation_pda(authority).0;
+    let board_address = board_pda().0;
+    let round_address = round_pda(round_id).0;
+    let treasury_address = TREASURY_ADDRESS;
+    Instruction {
+        program_id: crate::ID,
+        accounts: vec![
+            AccountMeta::new(signer, true),
+            AccountMeta::new(automation_address, false),
+            AccountMeta::new(board_address, false),
+            AccountMeta::new(miner_address, false),
+            AccountMeta::new(round_address, false),
+            AccountMeta::new(treasury_address, false),
+            AccountMeta::new_readonly(system_program::ID, false),
+        ],
+        data: Checkpoint {}.to_bytes(),
+    }
+}
 
 pub fn set_admin(signer: Pubkey, admin: Pubkey) -> Instruction {
     let config_address = config_pda().0;
diff --git a/api/src/state/miner.rs b/api/src/state/miner.rs
index 60f5d53..95ff8c0 100644
--- a/api/src/state/miner.rs
+++ b/api/src/state/miner.rs
@@ -22,10 +22,6 @@ pub struct Miner {
     /// The last round that this miner checkpointed.
     pub checkpoint_id: u64,
 
-    /// The amount of SOL this miner has had refunded and may claim.
-    #[deprecated]
-    pub refund_sol: u64,
-
     /// The amount of SOL this miner can claim.
     pub rewards_sol: u64,
 
diff --git a/program/src/checkpoint.rs b/program/src/checkpoint.rs
index 3c39666..44a7f50 100644
--- a/program/src/checkpoint.rs
+++ b/program/src/checkpoint.rs
@@ -13,13 +13,15 @@ pub fn process_checkpoint(accounts: &[AccountInfo<'_>], _data: &[u8]) -> Program
     };
     signer_info.is_signer()?;
     let board = board_info.as_account::<Board>(&ore_api::ID)?;
-    let miner = miner_info
-        .as_account_mut::<Miner>(&ore_api::ID)?
-        .assert_mut(|m| m.checkpoint_id < m.round_id)?; // Ensure miner has not already checkpointed this round.
+    let miner = miner_info.as_account_mut::<Miner>(&ore_api::ID)?;
+    // If miner has already checkpointed this round, return.
+    if miner.checkpoint_id == miner.round_id {
+        return Ok(());
+    }
     if round_info.data_is_empty() {
         // If round account is empty, ensure the correct account was provided.
         // This can happen if the miner attempted to checkpoint after the round expired and the account was closed.
-        // In this case, the miner forfeits any potential rewards and their checkpoint is recorded.
+        // In this case, the miner forfeits any potential rewards.
         round_info.has_seeds(&[ROUND, &miner.round_id.to_le_bytes()], &ore_api::ID)?;
         miner.checkpoint_id = miner.round_id;
         return Ok(());
@@ -33,7 +35,7 @@ pub fn process_checkpoint(accounts: &[AccountInfo<'_>], _data: &[u8]) -> Program
 
     // Ensure round is not expired.
     if clock.slot >= round.expires_at {
-        // In this case, the miner forfeits any potential rewards and their checkpoint is recorded.
+        // In this case, the miner forfeits any potential rewards.
         miner.checkpoint_id = miner.round_id;
         return Ok(());
     }
diff --git a/program/src/claim_sol.rs b/program/src/claim_sol.rs
index 8345348..d8cced4 100644
--- a/program/src/claim_sol.rs
+++ b/program/src/claim_sol.rs
@@ -19,16 +19,12 @@ pub fn process_claim_sol(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramRe
     system_program.is_program(&system_program::ID)?;
 
     // Normalize amount.
-    let total_claimable = miner.rewards_sol + miner.refund_sol;
-    let amount = total_claimable.min(amount);
+    let amount = miner.rewards_sol.min(amount);
 
     sol_log(&format!("Claiming {} SOL", lamports_to_sol(amount)).as_str());
 
-    // Update miner. Deduct from refund first, then from rewards.
-    let from_refund = amount.min(miner.refund_sol);
-    miner.refund_sol -= from_refund;
-    let from_rewards = amount - from_refund;
-    miner.rewards_sol -= from_rewards;
+    // Update miner.
+    miner.rewards_sol -= amount;
 
     // Transfer reward to recipient.
     miner_info.send(amount, signer_info);
diff --git a/program/src/deploy.rs b/program/src/deploy.rs
index 77070e9..3d3a59e 100644
--- a/program/src/deploy.rs
+++ b/program/src/deploy.rs
@@ -92,7 +92,6 @@ pub fn process_deploy(accounts: &[AccountInfo<'_>], data: &[u8]) -> ProgramResul
         miner.authority = *signer_info.key;
         miner.deployed = [0; 25];
         miner.cumulative = [0; 25];
-        miner.refund_sol = 0;
         miner.rewards_sol = 0;
         miner.rewards_ore = 0;
         miner.round_id = round.id;
diff --git a/program/src/lib.rs b/program/src/lib.rs
index 78fe999..459236d 100644
--- a/program/src/lib.rs
+++ b/program/src/lib.rs
@@ -9,6 +9,8 @@ mod claim_yield;
 mod close;
 mod deploy;
 mod deposit;
+mod migrate_board;
+mod migrate_miner;
 // mod initialize;
 mod log;
 mod reset;
@@ -29,6 +31,8 @@ use claim_yield::*;
 use close::*;
 use deploy::*;
 use deposit::*;
+use migrate_board::*;
+use migrate_miner::*;
 // use initialize::*;
 use log::*;
 use reset::*;
diff --git a/program/src/migrate_board.rs b/program/src/migrate_board.rs
new file mode 100644
index 0000000..eb189ef
--- /dev/null
+++ b/program/src/migrate_board.rs
@@ -0,0 +1,19 @@
+use ore_api::prelude::*;
+use solana_program::slot_hashes::SlotHashes;
+use steel::*;
+
+/// Pays out the winners and block reward.
+pub fn process_migrate_board(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResult {
+    // Load accounts.
+    let clock = Clock::get()?;
+    let [signer_info, board_info, system_program] = accounts else {
+        return Err(ProgramError::NotEnoughAccountKeys);
+    };
+    signer_info.is_signer()?;
+    let board = board_info.as_account_mut::<Board>(&ore_api::ID)?;
+    system_program.is_program(&system_program::ID)?;
+
+    // TODO Migrate miner account.
+
+    Ok(())
+}
diff --git a/program/src/migrate_miner.rs b/program/src/migrate_miner.rs
new file mode 100644
index 0000000..e83189b
--- /dev/null
+++ b/program/src/migrate_miner.rs
@@ -0,0 +1,20 @@
+use ore_api::prelude::*;
+use solana_program::slot_hashes::SlotHashes;
+use steel::*;
+
+/// Pays out the winners and block reward.
+pub fn process_migrate_miner(accounts: &[AccountInfo<'_>], _data: &[u8]) -> ProgramResult {
+    // Load accounts.
+    let clock = Clock::get()?;
+    let [signer_info, miner_info, system_program] = accounts else {
+        return Err(ProgramError::NotEnoughAccountKeys);
+    };
+    signer_info.is_signer()?;
+    let miner = miner_info.as_account_mut::<Miner>(&ore_api::ID)?;
+    system_program.is_program(&system_program::ID)?;
+
+    // TODO Migrate miner account.
+    // TODO Move refund_sol into rewards_sol.
+
+    Ok(())
+}