Add smooth node enrollment flow

crates/geth-auth/src/lib.rs

@@ -31,6 +31,16 @@ pub struct AuthOp {
     pub kind: AuthOpKind,
 }
 
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct AuthOpSignature {
+    pub op_id: AuthOpId,
+    pub signer: geth_types::KeyId,
+    pub signer_public_key: String,
+    pub namespace: String,
+    pub signature: Vec<u8>,
+    pub created_at: UnixMillis,
+}
+
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(tag = "kind", rename_all = "kebab-case")]
 pub enum AuthOpKind {