use stored ecash key when using credentials

common/bandwidth-controller/src/error.rs

@@ -49,4 +49,7 @@ pub enum BandwidthControllerError {
 
     #[error("Threshold not set yet")]
     NoThreshold,
+
+    #[error("Ecash key is not set yet")]
+    NoEcashKey,
 }

common/bandwidth-controller/src/lib.rs

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 use crate::error::BandwidthControllerError;
+use nym_compact_ecash::scheme::keygen::KeyPairUser;
 use nym_compact_ecash::scheme::{EcashCredential, Wallet};
 use nym_compact_ecash::setup::setup;
 use nym_compact_ecash::{Base58, PayInfo, SecretKeyUser};
@@ -18,11 +19,16 @@ pub mod error;
 pub struct BandwidthController<C, St> {
     storage: St,
     client: C,
+    ecash_keypair: Option<KeyPairUser>,
 }
 
 impl<C, St: Storage> BandwidthController<C, St> {
-    pub fn new(storage: St, client: C) -> Self {
-        BandwidthController { storage, client }
+    pub fn new(storage: St, client: C, ecash_keypair: Option<KeyPairUser>) -> Self {
+        BandwidthController {
+            storage,
+            client,
+            ecash_keypair,
+        }
     }
 
     pub fn storage(&self) -> &St {
@@ -99,6 +105,7 @@ where
         BandwidthController {
             storage: self.storage.clone(),
             client: self.client.clone(),
+            ecash_keypair: self.ecash_keypair.clone(),
         }
     }
 }

common/client-core/src/client/base_client/mod.rs

@@ -50,6 +50,7 @@ use nym_topology::provider_trait::TopologyProvider;
 use nym_topology::HardcodedTopologyProvider;
 use nym_validator_client::nyxd::contract_traits::DkgQueryClient;
 use std::fmt::Debug;
+use std::ops::Deref;
 use std::path::Path;
 use std::sync::Arc;
 use url::Url;
@@ -612,9 +613,13 @@ where
 
         // the components are started in very specific order. Unless you know what you are doing,
         // do not change that.
-        let bandwidth_controller = self
-            .dkg_query_client
-            .map(|client| BandwidthController::new(credential_store, client));
+        let bandwidth_controller = self.dkg_query_client.map(|client| {
+            BandwidthController::new(
+                credential_store,
+                client,
+                Some(init_res.managed_keys.ecash_keypair().deref().clone()),
+            )
+        });
 
         let topology_provider = Self::setup_topology_provider(
             self.custom_topology_provider.take(),

common/client-core/src/client/base_client/non_wasm_helpers.rs

@@ -119,7 +119,7 @@ pub fn create_bandwidth_controller_with_urls<St: CredentialStorage>(
 ) -> BandwidthController<QueryHttpRpcNyxdClient, St> {
     let client = default_query_dkg_client(nyxd_url);
 
-    BandwidthController::new(storage, client)
+    BandwidthController::new(storage, client, None)
 }
 
 pub fn default_query_dkg_client_from_config(config: &Config) -> QueryHttpRpcNyxdClient {

nym-api/src/network_monitor/mod.rs

@@ -98,6 +98,7 @@ impl<'a> NetworkMonitorBuilder<'a> {
                 )
                 .await,
                 self.nyxd_client.clone(),
+                None,
             )
         };