fix(cmd): add network validation in coffee cmd inputs

coffee_cmd/src/cmd.rs

@@ -1,5 +1,6 @@
 //! Coffee command line arguments definition.
 use clap::{Parser, Subcommand};
+use coffee_lib::{error, errors::CoffeeError};
 
 /// Coffee main command line definition for the command line tools.
 #[derive(Debug, Parser)]
@@ -133,6 +134,36 @@ impl From<&RemoteAction> for coffee_core::RemoteAction {
     }
 }
 
+#[derive(Debug)]
+enum ClnNetwork {
+    Mainnet,
+    Testnet,
+    Signet,
+    Regtest,
+}
+
+impl ClnNetwork {
+    fn from_str(network: &str) -> Option<Self> {
+
+        match network {
+            "mainnet" => Some(Self::Mainnet),
+            "testnet" => Some(Self::Testnet),
+            "signet" => Some(Self::Signet),
+            "regtest" => Some(Self::Regtest),
+            _ => None,
+        }
+    }
+
+    fn to_str(network: Self) -> Option<String> {
+        match network {
+            Self::Mainnet => Some("mainnet".to_string()),
+            Self::Testnet => Some("testnet".to_string()),
+            Self::Signet => Some("signet".to_string()),
+            Self::Regtest => Some("regtest".to_string()),
+        }
+    }
+}
+
 impl coffee_core::CoffeeArgs for CoffeeArgs {
     fn command(&self) -> coffee_core::CoffeeOperation {
         coffee_core::CoffeeOperation::from(&self.command)
@@ -147,7 +178,10 @@ impl coffee_core::CoffeeArgs for CoffeeArgs {
     }
 
     fn network(&self) -> Option<String> {
-        self.network.clone()
+        let network = self.network.clone().ok_or_else(|| error!("Network is not set")).ok()?;
+        let validated_network = ClnNetwork::from_str(&network.to_lowercase()).ok_or_else(|| error!("Invalid network name")).ok()?;
+
+        ClnNetwork::to_str(validated_network)
     }
 
     fn skip_verify(&self) -> bool {