Balance history

NostrStreamer/ApiModel/BalanceHistoryItem.cs

@@ -0,0 +1,24 @@
+using Newtonsoft.Json;
+
+namespace NostrStreamer.ApiModel;
+
+public enum BalanceHistoryItemType
+{
+    Credit,
+    Debit
+}
+
+public class BalanceHistoryItem
+{
+    [JsonProperty("created")]
+    public DateTime Created { get; init; }
+
+    [JsonProperty("type")]
+    public BalanceHistoryItemType Type { get; init; }
+
+    [JsonProperty("amount")]
+    public decimal Amount { get; init; }
+
+    [JsonProperty("desc")]
+    public string? Description { get; init; }
+}

NostrStreamer/Controllers/NostrController.cs

@@ -362,11 +362,46 @@ public class NostrController : Controller
         if (string.IsNullOrEmpty(userPubkey))
             return BadRequest();
 
-        var (fee, preimage) = await _userService.WithdrawFunds(userPubkey, invoice);
-        return Json(new
+        try
         {
-            fee, preimage
-        });
+            var (fee, preimage) = await _userService.WithdrawFunds(userPubkey, invoice);
+            return Json(new
+            {
+                fee, preimage
+            });
+        }
+        catch (Exception e)
+        {
+            return Json(new
+            {
+                error = e.Message
+            });
+        }
+    }
+
+    [HttpGet("history")]
+    public async Task<IActionResult> BalanceHistory([FromQuery] int page = 0, [FromQuery] int pageSize = 100)
+    {
+        var userPubkey = GetPubKey();
+        if (string.IsNullOrEmpty(userPubkey))
+            return BadRequest();
+
+        try
+        {
+            var txns = await _userService.BalanceHistory(userPubkey, page * pageSize, pageSize);
+            return Json(new
+            {
+                items = txns,
+                page, pageSize
+            });
+        }
+        catch (Exception e)
+        {
+            return Json(new
+            {
+                error = e.Message
+            });
+        }
     }
 
     private async Task<User?> GetUser()

NostrStreamer/Services/UserService.cs

@@ -149,13 +149,44 @@ public class UserService
         }
     }
 
-    public async Task<List<Payment>> ListPayments(string pubkey)
+    public async Task<List<Payment>> ListPayments(string pubkey, int offset = 0, int limit = 100)
     {
         return await _db.Payments
             .Where(a => a.PubKey == pubkey && a.IsPaid)
+            .Skip(offset)
+            .Take(limit)
             .ToListAsync();
     }
 
+    public async Task<List<BalanceHistoryItem>> BalanceHistory(string pubkey, int offset = 0, int limit = 100)
+    {
+        return await _db.Payments
+            .Where(a => a.PubKey == pubkey && a.IsPaid)
+            .Select(t => new BalanceHistoryItem
+            {
+                Created = t.Created,
+                Type = t.Type == PaymentType.Withdrawal ? BalanceHistoryItemType.Debit : BalanceHistoryItemType.Credit,
+                Description = t.Type == PaymentType.Withdrawal
+                    ? "Withdrawal"
+                    : (t.Type == PaymentType.Credit ? "Admin Credit" : ""),
+                Amount = t.Amount / 1000m
+            })
+            .Union(_db.Streams
+                .Where(a => a.PubKey == pubkey && a.State == UserStreamState.Ended)
+                .Select(t => new BalanceHistoryItem
+                {
+                    Created = t.Starts,
+                    Description = t.Event,
+                    Type = BalanceHistoryItemType.Debit,
+                    Amount = t.MilliSatsCollected / 1000m
+                }))
+            .OrderByDescending(a => a.Created)
+            .Skip(offset)
+            .Take(limit)
+            .ToListAsync();
+    }
+
+
     public async Task<long> MaxWithdrawalAmount(string pubkey)
     {
         var credit = await _db.Payments