nostr: impl Any for NostrSigner

This allows downcasting `Arc<dyn NostrSigner` to `Keys` or other concrete signer types.

Pull-Request: #845
Signed-off-by: Yuki Kishimoto <[email protected]>

Author: yukibtc

CHANGELOG.md

@@ -27,6 +27,10 @@
 
 ## Unreleased
 
+### Changed 
+
+* nostr: impl `Any` for `NostrSigner` ([Yuki Kishimoto] at https://github.com/rust-nostr/nostr/pull/845)
+
 ### Added
 
 * blossom: add new crate with Blossom support ([Daniel D’Aquino] at https://github.com/rust-nostr/nostr/pull/838)

crates/nostr/src/signer.rs

@@ -4,10 +4,11 @@
 
 //! Nostr Signer
 
+use core::any::Any;
 use alloc::borrow::Cow;
 use alloc::string::String;
 use alloc::sync::Arc;
-use core::fmt;
+use core::fmt::{self, Debug};
 
 use crate::util::BoxedFuture;
 use crate::{Event, PublicKey, UnsignedEvent};
@@ -88,7 +89,7 @@ pub enum SignerBackend<'a> {
 }
 
 /// Nostr signer abstraction
-pub trait NostrSigner: fmt::Debug + Send + Sync {
+pub trait NostrSigner: Any + Debug + Send + Sync {
     /// Signer backend
     fn backend(&self) -> SignerBackend;