feat: impl keysets

clientd-stateless/Cargo.toml

@@ -7,10 +7,6 @@ repository = "https://github.com/fedimint/fedimint-clientd"
 keywords = ["fedimint", "bitcoin", "lightning", "ecash"]
 license = "MIT"
 
-[[example]]
-name = "cashu_encoding"
-path = "examples/cashu_encoding.rs"
-
 [dependencies]
 anyhow = "1.0.75"
 axum = { version = "0.7.1", features = ["json", "ws"] }

clientd-stateless/src/cashu.rs

@@ -7,7 +7,7 @@ use base64::Engine;
 use bitcoin::secp256k1::{Secp256k1, SecretKey};
 use bitcoin::KeyPair;
 use fedimint_core::api::InviteCode;
-use fedimint_core::config::FederationIdPrefix;
+use fedimint_core::config::{FederationId, FederationIdPrefix};
 use fedimint_core::db::DatabaseValue;
 use fedimint_core::module::registry::ModuleDecoderRegistry;
 use fedimint_core::{Amount, TieredMulti};
@@ -148,7 +148,7 @@ impl fmt::Display for TokenV3 {
     }
 }
 
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Serialize)]
 #[serde(rename_all = "lowercase")]
 pub enum Unit {
     Msat,
@@ -161,3 +161,22 @@ pub enum Method {
     Bolt11,
     Onchain,
 }
+
+#[derive(Debug, Deserialize, Serialize)]
+#[serde(rename_all = "lowercase")]
+pub struct Keyset {
+    id: String,
+    unit: Unit,
+    active: bool,
+}
+
+impl From<FederationId> for Keyset {
+    fn from(federation_id: FederationId) -> Self {
+        let as_str = format!("00{}", federation_id.to_string());
+        Keyset {
+            id: as_str,
+            unit: Unit::Msat,
+            active: true,
+        }
+    }
+}

clientd-stateless/src/router/keysets.rs

@@ -1,10 +1,26 @@
 use axum::extract::State;
+use axum::Json;
+use serde::Serialize;
 
+use crate::cashu::Keyset;
 use crate::error::AppError;
 use crate::state::AppState;
 
+#[derive(Serialize)]
+#[serde(rename_all = "lowercase")]
+pub struct KeysetsResponse {
+    keysets: Vec<Keyset>,
+}
+
 #[axum_macros::debug_handler]
-pub async fn handle_keysets(State(_state): State<AppState>) -> Result<(), AppError> {
-    // TODO: Implement this function
-    Ok(())
+pub async fn handle_keysets(
+    State(state): State<AppState>,
+) -> Result<Json<KeysetsResponse>, AppError> {
+    let mut keysets = Vec::<Keyset>::new();
+    let ids = state.multimint.ids().await;
+    for id in ids {
+        keysets.push(Keyset::from(id))
+    }
+
+    Ok(Json(KeysetsResponse { keysets }))
 }