core: Add VerifyFactory

apub-core/src/signature.rs

@@ -37,6 +37,12 @@ pub trait Verify {
     fn verify(&self, signing_string: &str, signature: &str) -> Result<bool, Self::Error>;
 }
 
+/// Describes a marker type that is associated with a specific verifier
+pub trait VerifyFactory {
+    /// The Verify type associated with this factory
+    type Verify: Verify + VerifyBuilder;
+}
+
 /// Describes creating Verifiers
 pub trait VerifyBuilder: Verify {
     /// Build a verifier from a given public key in pem format