Starting to write config file

side-node/src/init/config.rs

@@ -0,0 +1,21 @@
+use serde::Serialize;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+use toml::to_string;
+
+/// Our node config. For now, it just has a name, but it'll expand as we add more features.
+#[derive(Serialize)]
+pub(crate) struct SideNodeConfig {
+    pub(crate) name: String,
+}
+
+pub(crate) fn write_config_to_file(
+    config: &SideNodeConfig,
+    file_path: &PathBuf,
+) -> Result<(), Box<dyn std::error::Error>> {
+    let toml_string = to_string(config)?;
+    let mut file = File::create(file_path)?;
+    file.write_all(toml_string.as_bytes())?;
+    Ok(())
+}