feat: add startup logging with config to signer

Author: hstove

stacks-signer/src/config.rs

@@ -14,6 +14,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+use std::fmt::Display;
 use std::fs;
 use std::net::{SocketAddr, ToSocketAddrs};
 use std::path::PathBuf;
@@ -329,6 +330,39 @@ impl GlobalConfig {
     pub fn load_from_file(path: &str) -> Result<Self, ConfigError> {
         Self::try_from(&PathBuf::from(path))
     }
+
+    /// Return a string with non-sensitive configuration
+    /// information for logging purposes
+    pub fn config_to_log_string(&self) -> String {
+        let tx_fee = match self.tx_fee_ustx {
+            0 => "default".to_string(),
+            _ => (self.tx_fee_ustx as f64 / 1_000_000.0).to_string(),
+        };
+        format!(
+            r#"
+Stacks node host: {node_host}
+Signer endpoint: {endpoint}
+Stacks address: {stacks_address}
+Public key: {public_key}
+Network: {network}
+Database path: {db_path}
+DKG transaction fee: {tx_fee} uSTX
+"#,
+            node_host = self.node_host,
+            endpoint = self.endpoint,
+            stacks_address = self.stacks_address.to_string(),
+            public_key = StacksPublicKey::from_private(&self.stacks_private_key).to_hex(),
+            network = self.network,
+            db_path = self.db_path.to_str().unwrap_or_default(),
+            tx_fee = tx_fee
+        )
+    }
+}
+
+impl Display for GlobalConfig {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.config_to_log_string())
+    }
 }
 
 /// Helper function for building a signer config for each provided signer private key
@@ -412,4 +446,24 @@ mod tests {
 
         assert_eq!(config.auth_password, "melon");
     }
+
+    #[test]
+    fn test_config_to_string() {
+        let config = GlobalConfig::load_from_file("./src/tests/conf/signer-0.toml").unwrap();
+        let config_str = config.config_to_log_string();
+        assert_eq!(
+            config_str,
+            format!(
+                r#"
+Stacks node host: 127.0.0.1:20443
+Signer endpoint: [::1]:30000
+Stacks address: ST3FPN8KBZ3YPBP0ZJGAAHTVFMQDTJCR5QPS7VTNJ
+Public key: 03bc489f27da3701d9f9e577c88de5567cf4023111b7577042d55cde4d823a3505
+Network: testnet
+Database path: :memory:
+DKG transaction fee: 0.01 uSTX
+"#
+            )
+        );
+    }
 }

stacks-signer/src/main.rs

@@ -38,12 +38,12 @@ use clap::Parser;
 use clarity::vm::types::QualifiedContractIdentifier;
 use libsigner::{RunningSigner, Signer, SignerEventReceiver, SignerSession, StackerDBSession};
 use libstackerdb::StackerDBChunkData;
-use slog::{slog_debug, slog_error};
+use slog::{slog_debug, slog_error, slog_info};
 use stacks_common::codec::read_next;
 use stacks_common::types::chainstate::StacksPrivateKey;
 use stacks_common::util::hash::to_hex;
 use stacks_common::util::secp256k1::{MessageSignature, Secp256k1PublicKey};
-use stacks_common::{debug, error};
+use stacks_common::{debug, error, info};
 use stacks_signer::cli::{
     Cli, Command, GenerateFilesArgs, GenerateStackingSignatureArgs, GetChunkArgs,
     GetLatestChunkArgs, PutChunkArgs, RunDkgArgs, RunSignerArgs, SignArgs, StackerDBArgs,
@@ -85,6 +85,7 @@ fn write_chunk_to_stdout(chunk_opt: Option<Vec<u8>>) {
 fn spawn_running_signer(path: &PathBuf) -> SpawnedSigner {
     let config = GlobalConfig::try_from(path).unwrap();
     let endpoint = config.endpoint;
+    info!("Starting signer with config: {}", config);
     let (cmd_send, cmd_recv) = channel();
     let (res_send, res_recv) = channel();
     let ev = SignerEventReceiver::new(config.network.is_mainnet());