lib

commit 5ef316033b8cfc39d05d0dc112d6e11fb2676e4d
parent 70f3f06576f6c004f7475077b5ecc67ffd18325a
Author: triesap <tyson@radroots.org>
Date:   Mon,  3 Aug 2026 22:07:01 +0000

domain: separate local signer binding

- model local signer ownership independently from account display identity
- bind signer metadata only to the canonical public-key coordinate
- keep credential material outside the public binding aggregate
- cover binding identity and redaction invariants

Diffstat:
M
crates/studio_domain/src/account.rs
 | 
29
++++++++++++++++++++++++++++-
M
crates/studio_domain/src/lib.rs
 | 
3
++-

2 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/crates/studio_domain/src/account.rs b/crates/studio_domain/src/account.rs
@@ -48,6 +48,23 @@ impl AccountIdentity {
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub struct LocalSignerBinding {
+    account: PublicKey,
+}
+
+impl LocalSignerBinding {
+    #[must_use]
+    pub const fn new(account: PublicKey) -> Self {
+        Self { account }
+    }
+
+    #[must_use]
+    pub const fn account(self) -> PublicKey {
+        self.account
+    }
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum SignerKind {
     LocalSecret,
     WatchOnly,
@@ -220,7 +237,7 @@ mod tests {
 
     use super::{
         AccountCreatedAt, AccountIdentity, AccountLabel, AccountSummary, KeyAvailability,
-        SignerKind,
+        LocalSignerBinding, SignerKind,
     };
 
     const NPUB: &str = "npub10elfcs4fr0l0r8af98jlmgdh9c8tcxjvz9qkw038js35mp4dma8qzvjptg";
@@ -288,4 +305,14 @@ mod tests {
             AccountIdentity::verify(PublicKey::from_bytes([8_u8; 32]), NPUB.to_owned()).is_err()
         );
     }
+
+    #[test]
+    fn local_signer_binding_carries_only_canonical_account_identity() {
+        let public_key = PublicKey::from_bytes([9_u8; 32]);
+        let identity = AccountIdentity::derive(public_key).expect("identity");
+        let binding = LocalSignerBinding::new(public_key);
+
+        assert_eq!(binding.account(), identity.public_key());
+        assert!(!format!("{binding:?}").contains("nsec1"));
+    }
 }
diff --git a/crates/studio_domain/src/lib.rs b/crates/studio_domain/src/lib.rs
@@ -8,7 +8,8 @@ pub mod relay;
 pub mod time;
 
 pub use account::{
-    AccountCreatedAt, AccountIdentity, AccountLabel, AccountSummary, KeyAvailability, SignerKind,
+    AccountCreatedAt, AccountIdentity, AccountLabel, AccountSummary, KeyAvailability,
+    LocalSignerBinding, SignerKind,
 };
 pub use error::{SafeError, SafeErrorCode, SafeMessage};
 pub use key::{Npub, Nsec, PublicKey, SecretKeyInput, SecretKeyInputKind};