inital commit, which is clearly not initial

Signed-off-by: Uncle Stretch <uncle.stretch@ghostchain.io>

client/cli/src/params/mod.rs

@@ -0,0 +1,70 @@
+use clap::Args;
+use sp_core::crypto::Ss58AddressFormat;
+
+#[derive(Copy, Clone, PartialEq, Eq, Debug)]
+pub struct ParseError;
+
+impl std::fmt::Display for ParseError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "failed to parse network value as u16")
+    }
+}
+
+impl std::error::Error for ParseError {}
+
+static ALL_POSSIBLE_NAMES: [&str; 2] = ["ghost", "casper"];
+static ALL_POSSIBLE_IDS: [u16; 2] = [1995, 1996];
+
+#[derive(Clone, Copy, PartialEq, Eq, Debug)]
+pub struct InnerSs58AddressFormat(Ss58AddressFormat);
+
+impl InnerSs58AddressFormat {
+    #[inline]
+    pub fn custom(prefix: u16) -> Self {
+        Self { 0: Ss58AddressFormat::custom(prefix) }
+    }
+}
+
+impl std::fmt::Display for InnerSs58AddressFormat {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(f, "{} network", ALL_POSSIBLE_IDS
+            .binary_search(&u16::from(self.0))
+            .expect("always be found"))
+    }
+}
+
+impl<'a>TryFrom<&'a str> for InnerSs58AddressFormat {
+    type Error = ParseError;
+
+    fn try_from(x: &'a str) -> Result<Self, Self::Error> {
+        match ALL_POSSIBLE_NAMES.iter().position(|&n| n == x) {
+            Some(id) => Ok(InnerSs58AddressFormat::custom(ALL_POSSIBLE_IDS[id])),
+            _ => Err(ParseError),
+        }
+    }
+}
+
+pub fn parse_s58_prefix_address_format(x: &str,) -> Result<Ss58AddressFormat, String> {
+    match InnerSs58AddressFormat::try_from(x) {
+        Ok(format_registry) => Ok(format_registry.0.into()),
+        Err(_) => Err(format!(
+            "Unable to parse variant. Known variants: {:?}",
+            &ALL_POSSIBLE_NAMES
+        ))
+    }
+}
+
+/// Optional flag for specifying network scheme
+#[derive(Debug, Clone, Args)]
+pub struct NetworkSchemeFlag {
+    /// Network address format
+    #[arg(
+        short = 'n',
+        long,
+        ignore_case = true,
+        value_parser = parse_s58_prefix_address_format,
+        value_name = "NETWORK",
+        default_value = "casper",
+    )]
+    pub network: Option<Ss58AddressFormat>,
+}