initial refactor in preparation for routing

Signed-off-by: William Casarin <jb55@jb55.com>

enostr/src/keypair.rs

@@ -8,7 +8,7 @@ pub struct Keypair {
 }
 
 impl Keypair {
-    pub fn new(secret_key: SecretKey) -> Self {
+    pub fn from_secret(secret_key: SecretKey) -> Self {
         let cloned_secret_key = secret_key.clone();
         let nostr_keys = nostr::Keys::new(secret_key);
         Keypair {
@@ -17,6 +17,10 @@ impl Keypair {
         }
     }
 
+    pub fn new(pubkey: Pubkey, secret_key: Option<SecretKey>) -> Self {
+        Keypair { pubkey, secret_key }
+    }
+
     pub fn only_pubkey(pubkey: Pubkey) -> Self {
         Keypair {
             pubkey,