Stage 6.2: Poinbase perpetual futures (PSC, SPARK) with slippage, funding, insurance fund, ADL, debt and seizure

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

src/Decentralized.Domain/Tuning.cs

@@ -162,6 +162,20 @@ namespace Decentralized.Domain
         public const double TxPoisonChance = 0.35, TxHijackChance = 0.3, TxPhishChance = 0.05;
         public const int TxPoisonDelayMax = 2;
 
+        /// <summary>永续合约：开平仓手续费、强平费、维持保证金比例；保险基金初值、每晚手续费补充、NPC 大行情穿仓的冲击系数与免冲击涨跌幅、手续费进基金的比例；
+        /// 基金见底时盈利仓位自动减仓的盈利折扣；资金费系数与上下限（每晚）；欠款日息、没收宽限天数、核销后拉黑天数；两个品种的最高杠杆与单仓名义价值上限。</summary>
+        public const double PerpFee = 0.001, PerpLiqFee = 0.02, PerpMaint = 0.10;
+        public const double PerpFund0 = 10000, PerpFundDrift = 150, PerpFundShock = 2000, PerpShockFree = 0.06, PerpFeeToFund = 0.3, PerpAdlHaircut = 0.5;
+        public const double PerpFundCoef = 0.10, PerpFundCap = 0.003;
+        /// <summary>永续的成交深度占现货主池的比例：开平仓的平均滑点 = 名义价值 / (深度倍数 × 池深)，和现货一样大单更贵。</summary>
+        public const double PerpDepthMult = 3.0;
+        /// <summary>开仓时按现价算权益至少要高出强平线多少（占名义价值的比例），否则拒绝（滑点太大，开了就被强平）。</summary>
+        public const double PerpOpenBuffer = 0.02;
+        public const double PerpDebtInterest = 0.02;
+        public const int PerpDebtDays = 7, PerpBanDays = 30;
+        public const int PerpPscLev = 5, PerpSparkLev = 3;
+        public const double PerpPscCap = 20000, PerpSparkCap = 5000;
+
         /// <summary>主交易对（信用点一侧）的深度随天数增长。</summary>
         public static double PoolDepth(int day) => PoolDepth0 * (1 + day / 60.0);
     }