Fix snow error

.gitignore

@@ -10,9 +10,14 @@ target/
 .vscode/
 
 mina-frost-client/tests/assets/
+mina-frost-client/tests/assets-duplicate/
 
 # GraphQL schemas
 *.graphql
 
-# AI generated folders
+# AI generated folders and files
 .claude/
+.codex
+
+# Playground
+playground/

SIGNING-WORKFLOW.md

@@ -19,7 +19,7 @@ This guide walks you through signing Mina transactions using FROST threshold sig
 | Join DKG (participant) | `mina-frost-client dkg -d <DESC> -s <SERVER_URL> -t <THRESHOLD> -c <CONFIG_PATH>` |
 | List groups | `mina-frost-client groups -c <CONFIG_PATH>` |
 | Coordinate signing | `mina-frost-client coordinator -g <GROUP_PUBKEY> -S <SIGNER_PUBKEYS> -m <TX_FILE> -o <SIG_OUT> -n <NETWORK> -c <CONFIG_PATH>` |
-| Join signing | `mina-frost-client participant -g <GROUP_PUBKEY> -c <CONFIG_PATH>` |
+| Join signing | `mina-frost-client participant -g <GROUP_PUBKEY> -S <SESSION_ID> -c <CONFIG_PATH>` |
 | Build GraphQL | `mina-frost-client graphql-build -i <INPUT_JSON> -o <OUTPUT_FILE>` |
 | Broadcast | `mina-frost-client graphql-broadcast -g <GRAPHQL_FILE> -e <ENDPOINT_URL>` |
 
@@ -601,7 +601,7 @@ mina-frost-client participant \
 | `-c` | Path to participant's config file |
 | `-s` | Server URL (optional if stored in group config) |
 | `-g` | Group public key |
-| `-S` | Session ID (optional if only one active session) |
+| `-S` | Session ID (use `sessions` command to list if coordinator output was lost) |
 | `-y` | Auto-approve signing (skip confirmation prompt) |
 
 **Example:**
@@ -611,13 +611,15 @@ mina-frost-client participant \
   -c ~/.frost/bob.toml \
   -s localhost:2744 \
   -g <GROUP_PUBLIC_KEY> \
+  -S <SESSION_ID> \
   -y
 
 # Eve joins
 mina-frost-client participant \
   -c ~/.frost/eve.toml \
   -s localhost:2744 \
   -g <GROUP_PUBLIC_KEY> \
+  -S <SESSION_ID> \
   -y
 ```
 

mina-frost-client/examples/signing_example/signing_example.sh

@@ -102,22 +102,41 @@ use_frost_client coordinator \
     -o "$GENERATED_DIR/signature.json" &
 COORDINATOR_PID=$!
 
-# Give coordinator time to create the signing session
+# Wait for the coordinator to create the signing session and get its ID
 echo "Waiting for coordinator to create signing session..."
-sleep 5
+SESSION_ID=""
+for _i in $(seq 1 20); do
+    SESSION_ID=$(use_frost_client sessions \
+        -c "$GENERATED_DIR/alice.toml" \
+        --server-url "$SERVER_URL" \
+        --group "$GROUP_PUBLIC_KEY" 2>&1 \
+        | sed -n 's/^Session with ID //p' | head -n1)
+    [ -n "$SESSION_ID" ] && break
+    sleep 0.5
+done
+
+if [ -z "$SESSION_ID" ]; then
+    echo "ERROR: Could not get session ID from coordinator"
+    exit 1
+fi
+echo "Session ID: $SESSION_ID"
 
 echo "Starting participant (Bob)..."
-echo "y" | use_frost_client participant \
+use_frost_client participant \
     -c "$GENERATED_DIR/bob.toml" \
     --server-url "$SERVER_URL" \
-    --group "$GROUP_PUBLIC_KEY" &
+    --group "$GROUP_PUBLIC_KEY" \
+    --session "$SESSION_ID" \
+    -y &
 BOB_PID=$!
 
 echo "Starting participant (Eve)..."
-echo "y" | use_frost_client participant \
+use_frost_client participant \
     -c "$GENERATED_DIR/eve.toml" \
     --server-url "$SERVER_URL" \
-    --group "$GROUP_PUBLIC_KEY" &
+    --group "$GROUP_PUBLIC_KEY" \
+    --session "$SESSION_ID" \
+    -y &
 EVE_PID=$!
 
 # Wait for completion

mina-frost-client/src/api.rs

@@ -76,6 +76,12 @@ impl std::fmt::Debug for PublicKey {
     }
 }
 
+impl std::fmt::Display for PublicKey {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", hex::encode(&self.0))
+    }
+}
+
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct SendArgs {
     pub session_id: Uuid,

mina-frost-client/src/cli/args.rs

@@ -204,10 +204,9 @@ pub enum Command {
         /// to list)
         #[arg(short, long)]
         group: String,
-        /// The session ID to use (use `sessions` to list). Can be omitted in
-        /// case there is a single active session.
+        /// The session ID to use (use `sessions` to list).
         #[arg(short = 'S', long)]
-        session: Option<String>,
+        session: String,
         /// Automatically answer yes to signing any package.
         #[arg(short = 'y', long, default_value_t = false)]
         yes: bool,

mina-frost-client/src/cli/participant.rs

@@ -41,7 +41,7 @@ pub async fn run_bluepallas(args: &Command) -> Result<(), Box<dyn Error>> {
         &group_config,
         key_package,
         server_url,
-        session,
+        &session,
     )?;
 
     // Execute signing
@@ -84,7 +84,7 @@ fn setup_participant_config<C: Ciphersuite>(
     group_config: &Group<C>,
     key_package: KeyPackage<C>,
     server_url: Option<String>,
-    session: Option<String>,
+    session: &str,
 ) -> Result<ParticipantConfig<C>, Box<dyn Error>> {
     // Determine server URL
     let server_url = if let Some(server_url) = server_url {
@@ -113,7 +113,7 @@ fn setup_participant_config<C: Ciphersuite>(
         port: server_url_parsed
             .port_or_known_default()
             .expect("always works for https"),
-        session_id: session.unwrap_or_default(),
+        session_id: session.to_owned(),
         comm_privkey: Some(
             user_config
                 .communication_key