Provide hmac keys on the napi (#1450)

* provide hmac keys on the napi

* alias the import instead

* use BigInt

Author: codabrink

bindings_ffi/src/mls.rs

@@ -1119,7 +1119,10 @@ impl FfiConversations {
 
     pub fn get_hmac_keys(&self) -> Result<HashMap<Vec<u8>, Vec<FfiHmacKey>>, GenericError> {
         let inner = self.inner_client.as_ref();
-        let conversations = inner.find_groups(GroupQueryArgs::default())?;
+        let conversations = inner.find_groups(GroupQueryArgs {
+            include_duplicate_dms: true,
+            ..GroupQueryArgs::default()
+        })?;
 
         let mut hmac_map = HashMap::new();
         for conversation in conversations {

bindings_node/src/conversations.rs

@@ -1,12 +1,13 @@
+use std::collections::HashMap;
 use std::ops::Deref;
 use std::sync::Arc;
 use std::vec;
 
-use napi::bindgen_prelude::{Error, Result, Uint8Array};
+use napi::bindgen_prelude::{BigInt, Error, Result, Uint8Array};
 use napi::threadsafe_function::{ErrorStrategy, ThreadsafeFunction, ThreadsafeFunctionCallMode};
 use napi::JsFunction;
 use napi_derive::napi;
-use xmtp_mls::groups::{GroupMetadataOptions, PreconfiguredPolicies};
+use xmtp_mls::groups::{GroupMetadataOptions, HmacKey as XmtpHmacKey, PreconfiguredPolicies};
 use xmtp_mls::storage::group::ConversationType as XmtpConversationType;
 use xmtp_mls::storage::group::GroupMembershipState as XmtpGroupMembershipState;
 use xmtp_mls::storage::group::GroupQueryArgs;
@@ -97,6 +98,21 @@ impl From<ListConversationsOptions> for GroupQueryArgs {
   }
 }
 
+#[napi(object)]
+pub struct HmacKey {
+  pub key: Vec<u8>,
+  pub epoch: BigInt,
+}
+
+impl From<XmtpHmacKey> for HmacKey {
+  fn from(value: XmtpHmacKey) -> Self {
+    Self {
+      epoch: BigInt::from(value.epoch),
+      key: value.key.to_vec(),
+    }
+  }
+}
+
 #[napi(object)]
 #[derive(Clone)]
 pub struct CreateGroupOptions {
@@ -325,6 +341,31 @@ impl Conversations {
       .await
   }
 
+  #[napi]
+  pub fn get_hmac_keys(&self) -> Result<HashMap<String, Vec<HmacKey>>> {
+    let inner = self.inner_client.as_ref();
+    let conversations = inner
+      .find_groups(GroupQueryArgs {
+        include_duplicate_dms: true,
+        ..Default::default()
+      })
+      .map_err(ErrorWrapper::from)?;
+
+    let mut hmac_map = HashMap::new();
+    for conversation in conversations {
+      let id = hex::encode(&conversation.group_id);
+      let keys = conversation
+        .hmac_keys(-1..=1)
+        .map_err(ErrorWrapper::from)?
+        .into_iter()
+        .map(Into::into)
+        .collect::<Vec<_>>();
+      hmac_map.insert(id, keys);
+    }
+
+    Ok(hmac_map)
+  }
+
   #[napi(ts_args_type = "callback: (err: null | Error, result: Conversation | undefined) => void")]
   pub fn stream(
     &self,