clean up & add docs

docs/api/endpoints.md

@@ -434,6 +434,42 @@ Authorization: Bearer sk-...
 }
 ```
 
+### Create Child Key
+
+Creates one or more child API keys that share the parent's balance. Each child key creation costs a fixed amount (configurable).
+
+```http
+POST /v1/balance/child-key
+Authorization: Bearer sk-...
+```
+
+**Request Body:**
+
+```json
+{
+  "count": 1
+}
+```
+
+**Parameters:**
+
+| Parameter | Type | Required | Default | Description |
+|-----------|------|----------|---------|-------------|
+| `count` | integer | Yes | - | Number of child keys to create (1-50) |
+
+**Response:**
+
+```json
+{
+  "api_keys": ["sk-abc...", "sk-def..."],
+  "count": 2,
+  "cost_msats": 2000,
+  "cost_sats": 2,
+  "parent_balance": 98000,
+  "parent_balance_sats": 98
+}
+```
+
 ## Provider Discovery
 
 ## Admin Settings

routstr/balance.py

@@ -310,7 +310,6 @@ async def create_child_key(
 
     response_data = {
         "api_keys": new_keys,
-        "api_key": new_keys[0],  # For backward compatibility
         "count": count,
         "cost_msats": total_cost,
         "cost_sats": total_cost // 1000,

ui/components/child-key-creator.tsx

@@ -65,8 +65,6 @@ export function ChildKeyCreator({
 
       if (result.api_keys && result.api_keys.length > 0) {
         setNewKeys(result.api_keys);
-      } else if (result.api_key) {
-        setNewKeys([result.api_key]);
       } else {
         throw new Error('No API keys returned from server');
       }

ui/lib/api/services/wallet.ts

@@ -44,7 +44,6 @@ export interface WithdrawResponse {
 
 export interface CreateChildKeyResponse {
   api_keys: string[];
-  api_key: string;
   count: number;
   cost_msats: number;
   cost_sats: number;