Terminal: buy-average price per coin in Poinbase and Web3; drop the price line on the Poinbase card

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

src/Decentralized.Domain/Wallet.cs

@@ -19,11 +19,30 @@ namespace Decentralized.Domain
         /// <summary>被执法标记。</summary>
         public bool Flagged;
 
+        /// <summary>买入记录：每种币买入的数量与花费（信用点等值），用来显示买入均价。卖出或转出时按比例减少。</summary>
+        public Dictionary<string, double> BuyQty = new Dictionary<string, double>(), BuyCost = new Dictionary<string, double>();
+
+        public void RecordBuy(string asset, double qty, double costCredits)
+        {
+            if (qty <= 0) return;
+            BuyQty[asset] = (BuyQty.TryGetValue(asset, out var q) ? q : 0) + qty;
+            BuyCost[asset] = (BuyCost.TryGetValue(asset, out var c) ? c : 0) + Math.Max(0, costCredits);
+        }
+
+        /// <summary>买入均价（信用点）；没有买入记录（例如全是挖出来的）返回 null。</summary>
+        public double? AvgBuy(string asset) => BuyQty.TryGetValue(asset, out var q) && q > 1e-9 ? BuyCost[asset] / q : (double?)null;
+
         public double Get(string asset) => Balances.TryGetValue(asset, out var v) ? v : 0;
 
         public void Add(string asset, double amount)
         {
             if (amount == 0) return;
+            if (amount < 0 && BuyQty.TryGetValue(asset, out var bq))
+            {
+                double before = Get(asset), keep = before > 1e-12 ? Math.Max(0, 1 + amount / before) : 0;
+                BuyQty[asset] = bq * keep; BuyCost[asset] *= keep;
+                if (BuyQty[asset] < 1e-9) { BuyQty.Remove(asset); BuyCost.Remove(asset); }
+            }
             double v = Get(asset) + amount;
             if (v < -1e-9) throw new InvalidOperationException($"{Address}: {asset} 余额不足");
             if (Math.Abs(v) < 1e-12) Balances.Remove(asset);

src/Decentralized/ModFiles/Localization/en.csv

@@ -148,3 +148,6 @@ bank.rent,"Rent: {0} credits, due in {1} days"
 bank.crc,"Poinbase account (CRC): {0}"
 bank.hint,"Deposit turns credits into CRC; withdrawing turns CRC back into credits and passes compliance review."
 poin.account,"Poinbase account: CRC {0}, PSC {1}"
+avg.line,"{0} average buy price: {1} credits"
+avg.short,"avg. buy {0}"
+avg.none,"—"

src/Decentralized/ModFiles/Localization/zh.csv

@@ -147,3 +147,6 @@ bank.rent,"房租：{0} 信用点，{1} 天后支付"
 bank.crc,"Poinbase 账户（CRC）：{0}"
 bank.hint,"存入把信用点换成 CRC，提取把 CRC 换回信用点，提取要过合规审查。"
 poin.account,"Poinbase 账户：CRC {0}，PSC {1}"
+avg.line,"{0} 买入均价：{1} 信用点"
+avg.short,"买入均价 {0}"
+avg.none,"—"

src/Decentralized/TerminalWindow.cs

@@ -56,7 +56,7 @@ namespace Decentralized
             b.AddImage(ModInfo.Id + ":" + icon, 96f, 96f);
             b.AddHeader(name);
             b.AddLabel(line1);
-            b.AddLabel(line2);
+            if (line2 != null) b.AddLabel(line2);
             b.AddFlexibleSpace();
             b.AddButton(L.T("home.enter"), () => Go(target));
             b.End();
@@ -70,7 +70,7 @@ namespace Decentralized
             b.AddSpace(6f);
             b.BeginRow(8f, TextAnchor.UpperCenter);
             Entry(b, "ui_bank", L.T("entry.bank"), L.T("entry.bank.l1"), L.T("entry.bank.l2", PlayerStore.Instance.playerCash), Page.Bank);
-            Entry(b, "ui_poinbase", L.T("entry.poinbase"), L.T("entry.poinbase.l1"), L.T("entry.poinbase.l2", Fmt.Num(d.Market.Price)), Page.Poinbase);
+            Entry(b, "ui_poinbase", L.T("entry.poinbase"), L.T("entry.poinbase.l1"), null, Page.Poinbase);
             Entry(b, "ui_web3", L.T("entry.web3"), L.T("entry.web3.l1"), L.T("entry.web3.l2", Fmt.Credits(chain)), Page.Web3);
             b.End();
             b.AddSpace(8f);
@@ -125,6 +125,7 @@ namespace Decentralized
             var w = Session.Data.Hot;
             b.AddHeader(L.T("entry.poinbase"));
             b.AddLabel(L.T("poin.account", Fmt.Num(w.Get(Assets.CRC)), Fmt.Num(w.Get(Assets.PSC))));
+            b.AddLabel(L.T("avg.line", Assets.PSC, AvgText(w, Assets.PSC)));
             b.AddLabel(L.T("trade.hint"));
             AmountRow(b);
             b.AddSeparator();
@@ -138,7 +139,7 @@ namespace Decentralized
             b.AddHeader(L.T("entry.web3"));
             if (w.Balances.Count == 0) b.AddLabel(L.T("wallet.empty"));
             foreach (var kv in w.Balances.OrderBy(k => k.Key))
-                b.AddLabel(L.T("wallet.line", kv.Key, Fmt.Num(kv.Value), Fmt.Credits(kv.Value * Session.Price(kv.Key))));
+                b.AddLabel(L.T("wallet.line", kv.Key, Fmt.Num(kv.Value), Fmt.Credits(kv.Value * Session.Price(kv.Key))) + "　" + L.T("avg.short", AvgText(w, kv.Key)));
             b.AddLabel(L.T("wallet.total", Fmt.Credits(w.Value(Session.Price))));
             if (w.Taint > 0.5) b.AddLabel(L.T("wallet.taint", Fmt.Credits(w.Taint)));
             b.AddSeparator();
@@ -148,6 +149,8 @@ namespace Decentralized
             TradeRows(b, Venue.Dex);
         }
 
+        private static string AvgText(Wallet w, string asset) => w.AvgBuy(asset) is double a ? Fmt.Num(a) : L.T("avg.none");
+
         private static void ReportPage(CustomUIBuilder b)
         {
             var r = Session.Data.LastNight;
@@ -181,6 +184,7 @@ namespace Decentralized
             ModHelper.AddCredit(-credits, false);
             var w = Session.Data.Hot;
             w.Add(Assets.CRC, credits / Session.Data.Stable.Crc);
+            w.RecordBuy(Assets.CRC, credits / Session.Data.Stable.Crc, credits);
             w.Basis += credits;
             _message = L.T("msg.deposit", credits);
             Session.Save();
@@ -213,8 +217,10 @@ namespace Decentralized
             string pay = buy ? p.Quote : p.Base, get = buy ? p.Base : p.Quote;
             if (w.Get(pay) + 1e-9 < v) { _message = L.T("msg.balance"); Open(); return; }
             double got = buy ? p.BuyBase(v) : p.SellBase(v);
+            double spent = v * Session.Price(pay);
             w.Add(pay, -v);
             w.Add(get, got);
+            w.RecordBuy(get, got, spent);
             _message = L.T("msg.trade", Fmt.Num(v), pay, Fmt.Num(got), get);
             Session.Save();
             Open();

tests/Decentralized.Domain.Tests/Program.cs

@@ -248,6 +248,20 @@ internal static class Program
             Check(hi.Price <= 300 + 1e-9, $"上限 3 倍：{hi.Price:0.0}");
         });
 
+        Test("钱包：买入均价按买入记录算，卖出和转出按比例减少，挖出的币不计入", () =>
+        {
+            var w = new Wallet { Address = "x" };
+            w.Add("PSC", 10);                       // 挖出的 10 个，无买入记录
+            Check(w.AvgBuy("PSC") == null, "没有买入记录时没有均价");
+            w.Add("PSC", 5); w.RecordBuy("PSC", 5, 400);
+            w.Add("PSC", 5); w.RecordBuy("PSC", 5, 600);
+            Check(Near(w.AvgBuy("PSC").Value, 100, 1e-9), "买 5 个花 400 + 买 5 个花 600：均价 100");
+            w.Add("PSC", -10);                      // 卖掉一半（20 个里的 10 个）
+            Check(Near(w.AvgBuy("PSC").Value, 100, 1e-9) && Near(w.BuyQty["PSC"], 5, 1e-9), "卖出后均价不变，买入记录按比例减少");
+            w.Add("PSC", -10);
+            Check(w.AvgBuy("PSC") == null, "清仓后记录清除");
+        });
+
         Test("市场：减半抬高价格锚（逐日靠拢），减半前一周有预期行情", () =>
         {
             Check(Near(Market.SupplyTarget(10, Tuning.BlockReward), 1.0, 1e-9), "减半前很远：目标因子 1");