105 lines
5.0 KiB
C#
105 lines
5.0 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace Decentralized.Domain
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{
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/// <summary>混币器里一笔在途的存入。</summary>
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public sealed class MixDeposit
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{
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public string Asset;
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public double Amount;
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/// <summary>存入时一并带走的污点与成本（信用点）。</summary>
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public double Taint, Basis;
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public int Rounds;
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public int ReadyDay;
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/// <summary>存入的钱包地址：到期提回这里。</summary>
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public string Wallet;
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}
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/// <summary>一笔混币结束时的结果，供夜间日志使用。</summary>
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public sealed class MixResult
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{
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public bool Rugged;
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public string Asset;
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public double Amount, TaintBefore, TaintAfter;
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public bool Flagged;
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}
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/// <summary>
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/// 混币器：把币存进去，每轮扣手续费、降低污点，轮数 = 等待天数，到期提回同一个地址。
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/// 匿名集 = NPC 背景量 + 玩家存入量，玩家占比越大清洗效果越差。镇压事件开始时可能被制裁：
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/// 制裁期间提出的币视为被标记（出金审查按"来自混币器或被标记地址"加重，且地址被标记）。每晚有极小概率跑路。
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/// </summary>
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public sealed class Mixer
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{
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public List<MixDeposit> Pending = new List<MixDeposit>();
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public int SanctionedUntil = -1;
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/// <summary>提回的币最近一次从混币器出来的天数，用来给出金审查加重。</summary>
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public int LastReturnDay = -999;
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public bool Sanctioned(int day) => day <= SanctionedUntil;
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/// <summary>资金来自混币器：最近 AML 窗口内提回过币，或者被标记。</summary>
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public bool RecentlyMixed(int day) => day - LastReturnDay <= Tuning.AmlWindowDays;
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/// <summary>一轮的清洗率：基准 × 匿名集系数。</summary>
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public static double RoundRate(double depositValue) => Tuning.MixerCleanRate * Tuning.MixerNpcVolume / (Tuning.MixerNpcVolume + Math.Max(0, depositValue));
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/// <summary>存入：从钱包按价值比例带走污点与成本。轮数超出范围或余额不足返回 null。</summary>
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public MixDeposit Deposit(Wallet w, string asset, double amount, int rounds, int day, Func<string, double> price)
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{
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if (rounds < 1 || rounds > Tuning.MixerMaxRounds || amount <= 0 || w.Avail(asset) + 1e-9 < amount) return null;
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double value = amount * price(asset);
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if (value < Tuning.MixerMin) return null;
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double total = w.Value(price);
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double share = total > 0 ? Math.Min(1, value / total) : 0;
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double taint = w.Taint * share, basis = w.Basis * share;
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w.Add(asset, -amount);
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w.Taint -= taint;
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w.Basis -= basis;
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var d = new MixDeposit { Asset = asset, Amount = amount, Taint = taint, Basis = basis, Rounds = rounds, ReadyDay = day + rounds, Wallet = w.Address };
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Pending.Add(d);
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return d;
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}
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/// <summary>镇压事件开始：有一定概率被制裁，持续若干天。</summary>
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public void OnEvent(MarketEvent ev, int day, Rng rng)
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{
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if (ev == MarketEvent.Crackdown && rng.Chance(Math.Min(1, Tuning.MixerSanctionChance * StoryMods.Current.Sanction(day)))) SanctionedUntil = day + Tuning.MixerSanctionDays;
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}
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/// <summary>每晚：到期的存入提回钱包（污点按轮数降低），在途的各有小概率跑路。</summary>
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public List<MixResult> Night(Wallet w, int day, Func<string, double> price, Rng rng) => Night(_ => w, day, price, rng);
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/// <summary>每晚（多钱包）：到期的存入按存入时的地址提回原钱包。</summary>
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public List<MixResult> Night(Func<string, Wallet> wallet, int day, Func<string, double> price, Rng rng)
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{
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var results = new List<MixResult>();
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foreach (var d in Pending.ToList())
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{
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if (rng.Chance(Tuning.MixerRugChance))
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{
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Pending.Remove(d);
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results.Add(new MixResult { Rugged = true, Asset = d.Asset, Amount = d.Amount });
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continue;
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}
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if (day < d.ReadyDay) continue;
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Pending.Remove(d);
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double rate = RoundRate(d.Amount * price(d.Asset));
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double taint = d.Taint * Math.Pow(1 - rate, d.Rounds);
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double amount = d.Amount * Math.Pow(1 - Tuning.MixerFee, d.Rounds);
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bool flagged = Sanctioned(day);
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var w = wallet(d.Wallet);
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w.Add(d.Asset, amount);
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w.Taint += taint;
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w.Basis += d.Basis;
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if (flagged) w.Flagged = true;
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LastReturnDay = day;
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results.Add(new MixResult { Asset = d.Asset, Amount = amount, TaintBefore = d.Taint, TaintAfter = taint, Flagged = flagged });
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}
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return results;
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}
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}
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}
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