Add DelegateSigner

core/conversations/src/lib.rs

@@ -31,4 +31,4 @@ pub use service_traits::{DeliveryService, RegistrationService, WakeupService};
 pub use shared_traits::{IdentId, IdentIdRef, IdentityProvider};
 pub use storage::ConversationKind;
 pub use types::AddressedEnvelope;
-pub use utils::hex_trunc;
+pub use utils::{hex_trunc, trunc};

core/conversations/src/utils.rs

@@ -71,3 +71,12 @@ pub fn hex_trunc(data: &[u8]) -> String {
         )
     }
 }
+
+#[allow(unused)]
+pub fn trunc(data: &str) -> String {
+    if data.len() <= 8 {
+        data.to_string()
+    } else {
+        format!("{}..{}", &data[..4], &data[data.len() - 4..])
+    }
+}

crates/client/Cargo.toml

@@ -11,10 +11,13 @@ crate-type = ["rlib"]
 chat-sqlite = { workspace = true }
 components = { workspace = true }
 crossbeam-channel = { workspace = true }
+crypto = { workspace = true }
 libchat = { workspace = true }
 logos-account = { workspace = true, features = ["dev"]}
+shared-traits = { workspace =  true }
 
 # External dependencies (sorted)
+hex = "0.4.3"
 parking_lot = "0.12"
 thiserror = "2"
 tracing = "0.1"

crates/client/src/client.rs

@@ -7,13 +7,13 @@ use libchat::{
     ChatError, ChatStorage, ConversationId, ConvoOutcome, Core, DeliveryService, IdentId,
     IdentIdRef, InboxOutcome, Introduction, PayloadOutcome, RegistrationService, StorageConfig,
 };
-use logos_account::TestLogosAccount;
 use parking_lot::Mutex;
 
+use crate::delegate::{self, DelegateCredential, DelegateSigner};
 use crate::errors::ClientError;
 use crate::event::Event;
 
-type ClientCore<T, R> = Core<(TestLogosAccount, T, R, ThreadedWakeupService, ChatStorage)>;
+type ClientCore<T, R> = Core<(DelegateSigner, T, R, ThreadedWakeupService, ChatStorage)>;
 type AccountAddressRef<'a> = &'a str;
 type LocalSignerId = IdentId;
 
@@ -53,11 +53,12 @@ impl<T: Transport> ChatClient<T, EphemeralRegistry> {
     /// Create an in-memory, ephemeral client. Identity is lost on drop.
     pub fn new(name: impl Into<String>, mut transport: T) -> (Self, Receiver<Event>) {
         let inbound = transport.inbound();
-        let ident = TestLogosAccount::new(name);
+        let delegate = DelegateSigner::random();
+
         let (wakeup_tx, wakeup_rx) = crossbeam_channel::unbounded();
         let wakeup_service = ThreadedWakeupService::new(wakeup_tx);
         let core = Core::new_with_name(
-            ident,
+            delegate,
             transport,
             EphemeralRegistry::new(),
             wakeup_service,
@@ -78,11 +79,11 @@ impl<T: Transport> ChatClient<T, EphemeralRegistry> {
     ) -> Result<(Self, Receiver<Event>), ClientError> {
         let store = ChatStorage::new(config).map_err(ChatError::from)?;
         let inbound = transport.inbound();
-        let ident = TestLogosAccount::new(name);
+        let delegate = DelegateSigner::random();
         let (wakeup_tx, wakeup_rx) = crossbeam_channel::unbounded();
         let wakeup_service = ThreadedWakeupService::new(wakeup_tx);
         let core = Core::new_from_store(
-            ident,
+            delegate,
             transport,
             EphemeralRegistry::new(),
             wakeup_service,
@@ -96,7 +97,7 @@ impl<T: Transport> ChatClient<T, EphemeralRegistry> {
 
 impl<T, R> ChatClient<T, R>
 where
-    T: DeliveryService + Send + 'static,
+    T: Transport + Send + 'static,
     R: RegistrationService + Send + 'static,
 {
     /// Open or create a persistent client with a caller-supplied registration
@@ -118,14 +119,35 @@ where
     {
         let store = ChatStorage::new(config).map_err(ChatError::from)?;
         let inbound = transport.inbound();
-        let ident = TestLogosAccount::new(name);
+        let delegate = DelegateSigner::random();
         let (wakeup_tx, wakeup_rx) = crossbeam_channel::unbounded();
         let wakeup_service = ThreadedWakeupService::new(wakeup_tx);
-        let mut core = Core::new_from_store(ident, transport, registry, wakeup_service, store)?;
+        let mut core = Core::new_from_store(delegate, transport, registry, wakeup_service, store)?;
         core.register_keypackage()?;
         Ok(Self::spawn(core, inbound, wakeup_rx))
     }
 
+    /// Create a client with ephemeral storage with the provided Transport and RegistrationService.
+    pub fn new_ephemeral(
+        delegate: DelegateSigner,
+        mut transport: T,
+        reg: R,
+    ) -> (Self, Receiver<Event>) {
+        let inbound = transport.inbound();
+
+        let (wakeup_tx, wakeup_rx) = crossbeam_channel::unbounded();
+        let wakeup_service = ThreadedWakeupService::new(wakeup_tx);
+        let core = Core::new_with_name(
+            delegate,
+            transport,
+            reg,
+            wakeup_service,
+            ChatStorage::in_memory(),
+        )
+        .unwrap();
+        Self::spawn(core, inbound, wakeup_rx)
+    }
+
     fn spawn(
         core: ClientCore<T, R>,
         inbound: Receiver<Vec<u8>>,
@@ -290,9 +312,15 @@ fn events_from_inbound(result: PayloadOutcome) -> Vec<Event> {
 fn convo_events(outcome: ConvoOutcome) -> Vec<Event> {
     let ConvoOutcome { convo_id, content } = outcome;
     content
-        .map(|c| Event::MessageReceived {
-            convo_id: Arc::from(convo_id),
-            content: c.bytes,
+        .map(|c| {
+            let data = hex::decode(c.encoded_credential).unwrap();
+            let delegate_cred = DelegateCredential::from(data);
+            println!("{:?}", delegate_cred);
+
+            Event::MessageReceived {
+                convo_id: Arc::from(convo_id),
+                content: c.bytes,
+            }
         })
         .into_iter()
         .collect()

crates/client/src/delegate.rs

@@ -0,0 +1,151 @@
+use crypto::{Ed25519SigningKey, Ed25519VerifyingKey};
+use libchat::{IdentId, IdentityProvider};
+
+use crate::ClientError;
+
+type AccountAddr = String;
+
+pub struct DelegateSigner {
+    signing_key: Ed25519SigningKey,
+    verifying_key: Ed25519VerifyingKey,
+    identifier: IdentId,
+    account_addr: Option<AccountAddr>,
+}
+
+impl DelegateSigner {
+    pub fn random() -> Self {
+        let signing_key = Ed25519SigningKey::generate();
+        let verifying_key = signing_key.verifying_key();
+        let identifier = DelegateCredential::unassociated(&verifying_key).into();
+        Self {
+            signing_key,
+            verifying_key,
+            identifier,
+            account_addr: None,
+        }
+    }
+
+    pub fn associate(&mut self, account_addr: AccountAddr) {
+        self.identifier =
+            DelegateCredential::associated(&self.verifying_key, account_addr.as_str()).into();
+        self.account_addr = Some(account_addr);
+    }
+
+    pub fn account_addr(&self) -> Option<&str> {
+        self.account_addr.as_deref()
+    }
+}
+
+impl IdentityProvider for DelegateSigner {
+    fn id(&self) -> libchat::IdentIdRef<'_> {
+        &self.identifier
+    }
+
+    fn display_name(&self) -> String {
+        trunc(self.identifier.as_str())
+    }
+
+    fn sign(&self, payload: &[u8]) -> crypto::Ed25519Signature {
+        self.signing_key.sign(payload)
+    }
+
+    fn public_key(&self) -> &Ed25519VerifyingKey {
+        &self.verifying_key
+    }
+}
+
+/// Represents the senders information for received frames.
+#[derive(Debug)]
+pub struct DelegateCredential {
+    delegate_id: Ed25519VerifyingKey,
+    account_addr: Option<AccountAddr>,
+}
+
+impl DelegateCredential {
+    const TAG_DELEGATE_ID: u8 = 0x01;
+    const TAG_ACCOUNT_ADDR: u8 = 0x02;
+
+    pub fn unassociated(delegate: &Ed25519VerifyingKey) -> Self {
+        Self {
+            delegate_id: delegate.clone(),
+            account_addr: None,
+        }
+    }
+
+    pub fn associated(delegate: &Ed25519VerifyingKey, account: &str) -> Self {
+        Self {
+            delegate_id: delegate.clone(),
+            account_addr: Some(account.to_string()),
+        }
+    }
+
+    pub fn to_vec(self) -> Vec<u8> {
+        let mut data = Vec::new();
+        data.extend_from_slice(&[0x23, 0x23]);
+        let key_bytes = self.delegate_id.as_ref();
+        data.extend_from_slice(&[Self::TAG_DELEGATE_ID, key_bytes.len() as u8]);
+        data.extend_from_slice(key_bytes);
+        if let Some(addr) = self.account_addr {
+            let addr_bytes = addr.as_bytes();
+            data.extend_from_slice(&[Self::TAG_ACCOUNT_ADDR, addr_bytes.len() as u8]);
+            data.extend_from_slice(addr_bytes);
+        }
+        data
+    }
+}
+
+impl From<DelegateCredential> for Vec<u8> {
+    fn from(value: DelegateCredential) -> Self {
+        value.to_vec()
+    }
+}
+
+impl From<Vec<u8>> for DelegateCredential {
+    fn from(value: Vec<u8>) -> Self {
+        assert_eq!(&value[..2], &[0x23, 0x23], "invalid magic bytes");
+        let mut delegate_id = None;
+        let mut account_addr = None;
+        let mut i = 2;
+        while i + 2 <= value.len() {
+            let tag = value[i];
+            let len = value[i + 1] as usize;
+            i += 2;
+            let v = &value[i..i + len];
+            i += len;
+            match tag {
+                DelegateCredential::TAG_DELEGATE_ID => {
+                    let bytes: &[u8; 32] = v.try_into().expect("invalid delegate_id length");
+                    delegate_id = Some(
+                        Ed25519VerifyingKey::from_bytes(bytes).expect("invalid verifying key"),
+                    );
+                }
+                DelegateCredential::TAG_ACCOUNT_ADDR => {
+                    account_addr =
+                        Some(String::from_utf8(v.to_vec()).expect("invalid account_addr utf8"));
+                }
+                _ => {}
+            }
+        }
+        Self {
+            delegate_id: delegate_id.expect("missing delegate_id TLV field"),
+            account_addr,
+        }
+    }
+}
+
+impl From<DelegateCredential> for IdentId {
+    fn from(value: DelegateCredential) -> Self {
+        IdentId::new(hex::encode(value.to_vec()))
+    }
+}
+
+impl TryFrom<IdentId> for DelegateCredential {
+    type Error = ClientError;
+
+    fn try_from(value: IdentId) -> Result<Self, Self::Error> {
+        Ok(hex::decode(value.as_str())
+            .map_err(|e| ClientError::BadlyFormedCredential)?
+            .into())
+    }
+}
+

crates/client/src/errors.rs

@@ -4,4 +4,6 @@ use libchat::ChatError;
 pub enum ClientError {
     #[error(transparent)]
     Chat(#[from] ChatError),
+    #[error("received credential could not be parsed")]
+    BadlyFormedCredential,
 }