diff --git a/applications/tari_console_wallet/src/automation/commands.rs b/applications/tari_console_wallet/src/automation/commands.rs
index a8e3f28f2c..b6e0da7bbb 100644
--- a/applications/tari_console_wallet/src/automation/commands.rs
+++ b/applications/tari_console_wallet/src/automation/commands.rs
@@ -34,6 +34,7 @@ use chrono::{DateTime, Utc};
 use digest::Digest;
 use futures::FutureExt;
 use log::*;
+use rand::rngs::OsRng;
 use serde::{de::DeserializeOwned, Serialize};
 use sha2::Sha256;
 use strum_macros::{Display, EnumIter, EnumString};
@@ -41,7 +42,7 @@ use tari_app_grpc::authentication::salted_password::create_salted_hashed_passwor
 use tari_common_types::{
     emoji::EmojiId,
     transaction::TxId,
-    types::{CommitmentFactory, FixedHash, PublicKey},
+    types::{CommitmentFactory, FixedHash, PrivateKey, PublicKey, Signature},
 };
 use tari_comms::{
     connectivity::{ConnectivityEvent, ConnectivityRequester},
@@ -53,6 +54,7 @@ use tari_core::transactions::{
     tari_amount::{uT, MicroTari, Tari},
     transaction_components::{OutputFeatures, TransactionOutput, UnblindedOutput},
 };
+use tari_crypto::keys::{PublicKey as TraitPublicKey, SecretKey};
 use tari_utilities::{hex::Hex, ByteArray};
 use tari_wallet::{
     connectivity_service::WalletConnectivityInterface,
@@ -87,6 +89,7 @@ pub enum WalletCommand {
     SendOneSided,
     CreateKeyPair,
     CreateAggregateSignatureUtxo,
+    SignMessage,
     MakeItRain,
     CoinSplit,
     DiscoverPeer,
@@ -272,6 +275,17 @@ pub async fn coin_split(
     Ok(tx_id)
 }
 
+pub fn sign_message(private_key: String, challenge: String) -> Result<Signature, CommandError> {
+    let private_key =
+        PrivateKey::from_hex(private_key.as_str()).map_err(|e| CommandError::InvalidArgument(e.to_string()))?;
+    let challenge = challenge.as_bytes();
+
+    let nonce = PrivateKey::random(&mut OsRng);
+    let signature = Signature::sign(private_key, nonce.clone(), challenge).map_err(CommandError::FailedSignature)?;
+
+    Ok(signature)
+}
+
 async fn wait_for_comms(connectivity_requester: &ConnectivityRequester) -> Result<(), CommandError> {
     let mut connectivity = connectivity_requester.get_event_subscription();
     print!("Waiting for connectivity... ");
@@ -697,6 +711,18 @@ pub async fn command_runner(
                 },
                 Err(e) => eprintln!("CreateAggregateSignatureUtxo error! {}", e),
             },
+            SignMessage(args) => match sign_message(args.private_key, args.challenge) {
+                Ok(sgn) => {
+                    println!(
+                        "Sign message: 
+                                1. signature: {},
+                                2. public key: {}",
+                        sgn.get_signature().to_hex(),
+                        sgn.get_public_nonce().to_hex(),
+                    )
+                },
+                Err(e) => eprintln!("SignMessage error! {}", e),
+            },
             SendTari(args) => {
                 match send_tari(
                     transaction_service.clone(),
diff --git a/applications/tari_console_wallet/src/automation/error.rs b/applications/tari_console_wallet/src/automation/error.rs
index 06ab26f57b..79f15842af 100644
--- a/applications/tari_console_wallet/src/automation/error.rs
+++ b/applications/tari_console_wallet/src/automation/error.rs
@@ -29,6 +29,7 @@ use log::*;
 use tari_common::exit_codes::{ExitCode, ExitError};
 use tari_common_types::types::FixedHashSizeError;
 use tari_core::transactions::{tari_amount::MicroTariError, transaction_components::TransactionError};
+use tari_crypto::signatures::SchnorrSignatureError;
 use tari_utilities::hex::HexError;
 use tari_wallet::{
     error::{WalletError, WalletStorageError},
@@ -82,6 +83,8 @@ pub enum CommandError {
     General(String),
     #[error("FixedHash size error `{0}`")]
     FixedHashSizeError(#[from] FixedHashSizeError),
+    #[error("Invalid signature: `{0}`")]
+    FailedSignature(#[from] SchnorrSignatureError),
 }
 
 impl From<CommandError> for ExitError {
diff --git a/applications/tari_console_wallet/src/cli.rs b/applications/tari_console_wallet/src/cli.rs
index c7f5a2e7d0..3f03f52cd8 100644
--- a/applications/tari_console_wallet/src/cli.rs
+++ b/applications/tari_console_wallet/src/cli.rs
@@ -118,6 +118,7 @@ pub enum CliCommands {
     BurnTari(BurnTariArgs),
     CreateKeyPair(CreateKeyPairArgs),
     CreateAggregateSignatureUtxo(CreateAggregateSignatureUtxoArgs),
+    SignMessage(SignMessageArgs),
     SendOneSided(SendTariArgs),
     SendOneSidedToStealthAddress(SendTariArgs),
     MakeItRain(MakeItRainArgs),
@@ -173,6 +174,12 @@ pub struct CreateAggregateSignatureUtxoArgs {
     pub public_keys: Vec<UniPublicKey>,
 }
 
+#[derive(Debug, Args, Clone)]
+pub struct SignMessageArgs {
+    pub private_key: String,
+    pub challenge: String,
+}
+
 #[derive(Debug, Args, Clone)]
 pub struct MakeItRainArgs {
     pub destination: UniPublicKey,
diff --git a/applications/tari_console_wallet/src/wallet_modes.rs b/applications/tari_console_wallet/src/wallet_modes.rs
index 1315d33a9d..313ecfe513 100644
--- a/applications/tari_console_wallet/src/wallet_modes.rs
+++ b/applications/tari_console_wallet/src/wallet_modes.rs
@@ -433,6 +433,8 @@ mod test {
                       --public-keys=5c4f2a4b3f3f84e047333218a84fd24f581a9d7e4f23b78e3714e9d174427d61 \
                       --public-keys=f6b2ca781342a3ebe30ee1643655c96f1d7c14f4d49f077695395de98ae73665
 
+            sign-message 5c4f2a4b3f3f84e047333218a84fd24f581a9d7e4f23b78e3714e9d174427d61 my_challenge!
+
             coin-split --message Make_many_dust_UTXOs! --fee-per-gram 2 0.001T 499
 
             make-it-rain --duration 100 --transactions-per-second 10 --start-amount 0.009200T --increase-amount 0T \
@@ -450,6 +452,7 @@ mod test {
         let mut burn_tari = false;
         let mut create_key_pair = false;
         let mut create_aggregate_signature_utxo = false;
+        let mut sign_message = false;
         let mut make_it_rain = false;
         let mut coin_split = false;
         let mut discover_peer = false;
@@ -461,6 +464,7 @@ mod test {
                 CliCommands::BurnTari(_) => burn_tari = true,
                 CliCommands::CreateKeyPair(_) => create_key_pair = true,
                 CliCommands::CreateAggregateSignatureUtxo(_) => create_aggregate_signature_utxo = true,
+                CliCommands::SignMessage(_) => sign_message = true,
                 CliCommands::SendOneSided(_) => {},
                 CliCommands::SendOneSidedToStealthAddress(_) => {},
                 CliCommands::MakeItRain(_) => make_it_rain = true,
@@ -486,6 +490,7 @@ mod test {
                 burn_tari &&
                 create_key_pair &&
                 create_aggregate_signature_utxo &&
+                sign_message &&
                 make_it_rain &&
                 coin_split &&
                 discover_peer &&
diff --git a/infrastructure/tari_script/src/op_codes.rs b/infrastructure/tari_script/src/op_codes.rs
index 745f3a0eeb..16faa5b913 100644
--- a/infrastructure/tari_script/src/op_codes.rs
+++ b/infrastructure/tari_script/src/op_codes.rs
@@ -556,10 +556,10 @@ impl fmt::Display for Opcode {
                     (*msg).to_hex()
                 ))
             },
-            Return => fmt.write_str("Return"),
-            IfThen => fmt.write_str("IfThen"),
-            Else => fmt.write_str("Else"),
-            EndIf => fmt.write_str("EndIf"),
+            Return => write!(fmt, "Return"),
+            IfThen => write!(fmt, "IfThen"),
+            Else => write!(fmt, "Else"),
+            EndIf => write!(fmt, "EndIf"),
         }
     }
 }