diff --git a/base_layer/core/src/consensus/consensus_constants.rs b/base_layer/core/src/consensus/consensus_constants.rs
index 08f0eecd03..862b38aa06 100644
--- a/base_layer/core/src/consensus/consensus_constants.rs
+++ b/base_layer/core/src/consensus/consensus_constants.rs
@@ -507,11 +507,6 @@ impl ConsensusConstants {
             target_time: 200,
         });
         let (input_version_range, output_version_range, kernel_version_range) = version_zero();
-        let output_version_2_range = OutputVersionRange {
-            outputs: TransactionOutputVersion::V0..=TransactionOutputVersion::V0,
-            features: OutputFeaturesVersion::V0..=OutputFeaturesVersion::V0,
-            opcode: OpcodeVersion::V0..=OpcodeVersion::V1,
-        };
         let consensus_constants_1 = ConsensusConstants {
             effective_from_height: 0,
             coinbase_lock_height: 6,
@@ -534,29 +529,8 @@ impl ConsensusConstants {
             kernel_version_range,
             permitted_output_types: Self::current_permitted_output_types(),
         };
-        let consensus_constants_2 = ConsensusConstants {
-            effective_from_height: 23000,
-            blockchain_version: 1,
-            valid_blockchain_version_range: 0..=1,
-            ..consensus_constants_1.clone()
-        };
-        let consensus_constants_3 = ConsensusConstants {
-            effective_from_height: 25000,
-            output_version_range: output_version_2_range,
-            ..consensus_constants_2.clone()
-        };
-        let consensus_constants_4 = ConsensusConstants {
-            effective_from_height: 33000,
-            blockchain_version: 2,
-            ..consensus_constants_3.clone()
-        };
 
-        vec![
-            consensus_constants_1,
-            consensus_constants_2,
-            consensus_constants_3,
-            consensus_constants_4,
-        ]
+        vec![consensus_constants_1]
     }
 
     pub fn mainnet() -> Vec<Self> {
diff --git a/base_layer/core/src/proof_of_work/sha3_pow.rs b/base_layer/core/src/proof_of_work/sha3_pow.rs
index 6d79061c38..6bb0308df8 100644
--- a/base_layer/core/src/proof_of_work/sha3_pow.rs
+++ b/base_layer/core/src/proof_of_work/sha3_pow.rs
@@ -34,26 +34,16 @@ use crate::{
 /// Mining using this CPU version of the algorithm is unlikely to be profitable, but is included for reference and
 /// can be used to mine tXTR on testnets.
 pub fn sha3x_difficulty(header: &BlockHeader) -> Difficulty {
-    match header.version {
-        2 => sha3x_difficulty_with_hash(header).0,
-        _ => old_sha3_difficulty_with_hash(header).0,
-    }
+    sha3x_difficulty_with_hash(header).0
 }
 
 pub fn sha3_hash(header: &BlockHeader) -> Vec<u8> {
-    let sha = Sha3_256::new();
-    match header.version {
-        0 => sha
-            .chain(header.mining_hash())
-            .chain(header.nonce.to_le_bytes())
-            .chain(header.pow.to_bytes()),
-        _ => sha
-            .chain(header.nonce.to_le_bytes())
-            .chain(header.mining_hash())
-            .chain(header.pow.to_bytes()),
-    }
-    .finalize()
-    .to_vec()
+    Sha3_256::new()
+        .chain(header.nonce.to_le_bytes())
+        .chain(header.mining_hash())
+        .chain(header.pow.to_bytes())
+        .finalize()
+        .to_vec()
 }
 
 fn sha3x_difficulty_with_hash(header: &BlockHeader) -> (Difficulty, Vec<u8>) {
@@ -64,13 +54,6 @@ fn sha3x_difficulty_with_hash(header: &BlockHeader) -> (Difficulty, Vec<u8>) {
     (difficulty, hash.to_vec())
 }
 
-fn old_sha3_difficulty_with_hash(header: &BlockHeader) -> (Difficulty, Vec<u8>) {
-    let hash = sha3_hash(header);
-    let hash = Sha3_256::digest(&hash);
-    let difficulty = big_endian_difficulty(&hash);
-    (difficulty, hash.to_vec())
-}
-
 #[cfg(test)]
 pub mod test {
     use chrono::{DateTime, NaiveDate, Utc};
diff --git a/base_layer/tari_mining_helper_ffi/src/lib.rs b/base_layer/tari_mining_helper_ffi/src/lib.rs
index 67c2450918..f93c1ebad2 100644
--- a/base_layer/tari_mining_helper_ffi/src/lib.rs
+++ b/base_layer/tari_mining_helper_ffi/src/lib.rs
@@ -370,8 +370,8 @@ mod tests {
 
     #[test]
     fn detect_change_in_consensus_encoding() {
-        const NONCE: u64 = 1368783905506569398;
-        const DIFFICULTY: Difficulty = Difficulty::from_u64(3549);
+        const NONCE: u64 = 18006431465547767508;
+        const DIFFICULTY: Difficulty = Difficulty::from_u64(13879);
         unsafe {
             let mut error = -1;
             let error_ptr = &mut error as *mut c_int;
diff --git a/infrastructure/tari_script/src/op_codes.rs b/infrastructure/tari_script/src/op_codes.rs
index b862e1a41c..e946b69d9c 100644
--- a/infrastructure/tari_script/src/op_codes.rs
+++ b/infrastructure/tari_script/src/op_codes.rs
@@ -316,12 +316,12 @@ impl Opcode {
             Opcode::CheckSigVerify(..) |
             Opcode::CheckMultiSig(..) |
             Opcode::CheckMultiSigVerify(..) |
+            Opcode::CheckMultiSigVerifyAggregatePubKey(..) |
             Opcode::ToRistrettoPoint |
             Opcode::Return |
             Opcode::IfThen |
             Opcode::Else |
             Opcode::EndIf => OpcodeVersion::V0,
-            Opcode::CheckMultiSigVerifyAggregatePubKey(..) => OpcodeVersion::V1,
         }
     }
 
@@ -636,7 +636,6 @@ impl fmt::Display for Opcode {
 #[repr(u8)]
 pub enum OpcodeVersion {
     V0 = 0,
-    V1 = 1,
 }
 
 #[cfg(test)]