54 lines
2.2 KiB
C#
54 lines
2.2 KiB
C#
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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>
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/// 一个链上地址：各币种余额，加上整个地址的污点额与成本（信用点等值）。
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/// 污点和成本按转出的价值比例随币走。
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/// </summary>
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public sealed class Wallet
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{
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public string Address;
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public Dictionary<string, double> Balances = new Dictionary<string, double>();
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/// <summary>污点额（信用点等值）。</summary>
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public double Taint;
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/// <summary>成本（信用点）：出金时只对超出成本的部分征税。</summary>
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public double Basis;
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/// <summary>被执法标记。</summary>
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public bool Flagged;
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public double Get(string asset) => Balances.TryGetValue(asset, out var v) ? v : 0;
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public void Add(string asset, double amount)
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{
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if (amount == 0) return;
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double v = Get(asset) + amount;
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if (v < -1e-9) throw new InvalidOperationException($"{Address}: {asset} 余额不足");
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if (Math.Abs(v) < 1e-12) Balances.Remove(asset);
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else Balances[asset] = v;
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}
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/// <summary>按价格表估值（信用点）。</summary>
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public double Value(Func<string, double> price) => Balances.Sum(kv => kv.Value * price(kv.Key));
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/// <summary>
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/// 转出：taint 和 basis 按转出价值占地址总价值的比例带走。Ponero 等不可追踪资产转入时，污点不随之进入目标地址。
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/// </summary>
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public static void Transfer(Wallet from, Wallet to, string asset, double amount, Func<string, double> price)
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{
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if (amount <= 0) return;
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double total = from.Value(price);
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double share = total > 0 ? Math.Min(1.0, amount * price(asset) / total) : 0;
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double taint = from.Taint * share, basis = from.Basis * share;
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from.Add(asset, -amount);
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from.Taint -= taint;
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from.Basis -= basis;
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to.Add(asset, amount);
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var spec = Assets.Get(asset);
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if (spec == null || spec.Traceable) to.Taint += taint;
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to.Basis += basis;
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}
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}
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}
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