diff --git a/program/src/auth.rs b/program/src/auth.rs
deleted file mode 100644
index 2489262..0000000
--- a/program/src/auth.rs
+++ /dev/null
@@ -1,53 +0,0 @@
-use ore_api::consts::COMPUTE_BUDGET_PROGRAM_ID;
-use solana_program::{
-    pubkey,
-    pubkey::Pubkey,
-    sanitize::SanitizeError,
-    serialize_utils::{read_pubkey, read_u16},
-};
-
-/// Get the authenticated pubkey.
-///
-/// The intent here is to disincentivize sybil. If a user can fit multiple hashes into a single
-/// transaction, there is a financial incentive to sybil multiple keypairs and pack as many hashes
-/// as possible into each transaction to minimize fee / hash.
-///
-/// If each transaction is limited to one hash only, then a user will minimize their fee / hash
-/// by allocating all their hashpower to finding the single most difficult hash they can.
-///
-/// We solve this by "authenticating" the proof account on every mine instruction. That is,
-/// every transaction with a `mine` instruction needs to include an `auth` instruction that
-/// specifies the proof account that will be used. The `auth` instruction must be first ORE
-/// instruction in the transaction. The `mine` instruction should error out if the provided proof
-/// account doesn't match the authenticated address.
-///
-/// Errors if:
-/// - Fails to find and parse an authentication address.
-pub fn authenticate(data: &[u8]) -> Result<Option<Pubkey>, SanitizeError> {
-    // Start the current byte index at 0
-    let mut curr = 0;
-    let num_instructions = read_u16(&mut curr, data)?;
-    let pc = curr;
-
-    // Iterate through the transaction instructions
-    for i in 0..num_instructions as usize {
-        // Get byte counter
-        curr = pc + i * 2;
-        curr = read_u16(&mut curr, data)? as usize;
-
-        // Read the instruction program id
-        let num_accounts = read_u16(&mut curr, data)? as usize;
-        curr += num_accounts * 33;
-        let program_id = read_pubkey(&mut curr, data)?;
-
-        // Introspect on the first non compute budget instruction
-        if program_id.ne(&COMPUTE_BUDGET_PROGRAM_ID) {
-            // Read address from ix data
-            curr += 2;
-            let address = read_pubkey(&mut curr, data)?;
-            return Ok(Some(address));
-        }
-    }
-
-    Ok(None)
-}
diff --git a/program/src/lib.rs b/program/src/lib.rs
index 1f51675..bdb31b0 100644
--- a/program/src/lib.rs
+++ b/program/src/lib.rs
@@ -1,4 +1,3 @@
-mod auth;
 mod claim;
 mod close;
 mod initialize;
@@ -9,7 +8,6 @@ mod stake;
 mod update;
 mod upgrade;
 
-use auth::*;
 use claim::*;
 use close::*;
 use initialize::*;
diff --git a/program/src/mine.rs b/program/src/mine.rs
index 0346828..bc8f50a 100644
--- a/program/src/mine.rs
+++ b/program/src/mine.rs
@@ -18,11 +18,14 @@ use solana_program::{
     entrypoint::ProgramResult,
     log::sol_log,
     program_error::ProgramError,
+    pubkey::Pubkey,
+    sanitize::SanitizeError,
+    serialize_utils::{read_pubkey, read_u16},
     slot_hashes::SlotHash,
     sysvar::{self, Sysvar},
 };
 
-use crate::{authenticate, utils::AccountDeserialize};
+use crate::utils::AccountDeserialize;
 
 /// Mine is the primary workhorse instruction of the Ore program. Its responsibilities include:
 /// 1. Calculate the hash from the provided nonce.
@@ -179,3 +182,49 @@ pub fn process_mine<'a, 'info>(accounts: &'a [AccountInfo<'info>], data: &[u8])
 
     Ok(())
 }
+
+/// Get the authenticated pubkey.
+///
+/// The intent here is to disincentivize sybil. If a user can fit multiple hashes into a single
+/// transaction, there is a financial incentive to sybil multiple keypairs and pack as many hashes
+/// as possible into each transaction to minimize fee / hash.
+///
+/// If each transaction is limited to one hash only, then a user will minimize their fee / hash
+/// by allocating all their hashpower to finding the single most difficult hash they can.
+///
+/// We solve this by "authenticating" the proof account on every mine instruction. That is,
+/// every transaction with a `mine` instruction needs to include an `auth` instruction that
+/// specifies the proof account that will be used. The `auth` instruction must be first ORE
+/// instruction in the transaction. The `mine` instruction should error out if the provided proof
+/// account doesn't match the authenticated address.
+///
+/// Errors if:
+/// - Fails to find and parse an authentication address.
+fn authenticate(data: &[u8]) -> Result<Option<Pubkey>, SanitizeError> {
+    // Start the current byte index at 0
+    let mut curr = 0;
+    let num_instructions = read_u16(&mut curr, data)?;
+    let pc = curr;
+
+    // Iterate through the transaction instructions
+    for i in 0..num_instructions as usize {
+        // Get byte counter
+        curr = pc + i * 2;
+        curr = read_u16(&mut curr, data)? as usize;
+
+        // Read the instruction program id
+        let num_accounts = read_u16(&mut curr, data)? as usize;
+        curr += num_accounts * 33;
+        let program_id = read_pubkey(&mut curr, data)?;
+
+        // Introspect on the first non compute budget instruction
+        if program_id.ne(&COMPUTE_BUDGET_PROGRAM_ID) {
+            // Read address from ix data
+            curr += 2;
+            let address = read_pubkey(&mut curr, data)?;
+            return Ok(Some(address));
+        }
+    }
+
+    Ok(None)
+}