Hardware wallet window: invoices paid from PLEDGER, checksummed addresses, DEX signing, block confirmation animation

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

src/Decentralized.Domain/BmOrders.cs

@@ -198,7 +198,7 @@ namespace Decentralized.Domain
                 double hi = t == MerchantType.Elite ? Tuning.BmFactorEliteMax : t == MerchantType.GpuNew ? Tuning.BmFactorNewMax : t == MerchantType.GpuUsed ? Tuning.BmFactorUsedMax : t == MerchantType.Bulk ? Tuning.BmFactorBulkMax : Tuning.BmFactorMax;
                 var s = new BmSeller
                 {
-                    Name = "0x" + rng.NextUInt().ToString("x8").Substring(0, 6),
+                    Name = ChainAddress.Make(rng.NextUInt()),
                     Scam = scam, Type = t, Factor = personal ? 1.0 : F(rng, lo, hi),
                     Trades = fresh ? rng.Range(0, Tuning.BmFreshTradesMax) : rng.Range(Tuning.BmOldTradesMin, Tuning.BmOldTradesMax),
                     Rating = scam && !fresh ? rng.Range(Tuning.BmScamOldRatingMin, Tuning.BmScamOldRatingMax) : fresh ? rng.Range(Tuning.BmFreshRatingMin, Tuning.BmFreshRatingMax) : rng.Range(Tuning.BmOldRatingMin, Tuning.BmOldRatingMax),

src/Decentralized.Domain/ChainAddress.cs

@@ -0,0 +1,45 @@
+namespace Decentralized.Domain
+{
+    /// <summary>
+    /// 链上地址："0x" + 6 位随机十六进制 + 2 位校验位。手输地址时输错一位，校验位几乎总能发现（约 1/256 恰好也合法，币就转进了没人用的地址）。
+    /// </summary>
+    public static class ChainAddress
+    {
+        public const int BodyLength = 6, CheckLength = 2, Length = 2 + BodyLength + CheckLength;
+
+        public static string Make(uint r)
+        {
+            string body = (r & 0xFFFFFF).ToString("x6");
+            return "0x" + body + Check(body);
+        }
+
+        /// <summary>校验位：地址主体的 FNV-1a 散列取高 8 位（低位对单字符改动是一一对应的，永远不会碰巧合法）。</summary>
+        public static string Check(string body)
+        {
+            uint h = 2166136261;
+            foreach (char c in body) { h ^= c; h *= 16777619; }
+            return (h >> 24).ToString("x2");
+        }
+
+        public static string Normalize(string s) => (s ?? "").Trim().ToLowerInvariant();
+
+        /// <summary>格式对（0x 开头、十六进制、长度对）。</summary>
+        public static bool WellFormed(string s)
+        {
+            s = Normalize(s);
+            if (s.Length != Length || !s.StartsWith("0x")) return false;
+            for (int i = 2; i < s.Length; i++)
+                if (!(s[i] >= '0' && s[i] <= '9' || s[i] >= 'a' && s[i] <= 'f')) return false;
+            return true;
+        }
+
+        /// <summary>格式对且校验位对得上。</summary>
+        public static bool Valid(string s)
+        {
+            s = Normalize(s);
+            return WellFormed(s) && Check(s.Substring(2, BodyLength)) == s.Substring(2 + BodyLength);
+        }
+
+        public static bool Same(string a, string b) => Normalize(a) == Normalize(b);
+    }
+}