C#實現(xiàn)簡單的(de)區(qū)塊鏈

發表時(shí)間(jiān)：2024-1-12

發布人(rén)：葵宇科(kē)技(jì)

浏覽次數(shù)：53

在C#中實現(xiàn)區(qū)塊鏈的(de)數(δ'‍∞shù)據存儲可(kě)以通(tōng)過創建一(yī)個(gè)自(zì)定義的(de€‌≠)數(shù)據結構來(lái)表示區(qū)塊鏈中的(de¥™÷£)區(qū)塊，然後使用(yòng)文(wén)件(jiàn)或數(shù<↕¶)據庫來(lái)存儲這(zhè)些(xiē)區(qū)★<♦塊數(shù)據。以下(xià)是(shì)一(yī)個(gè)簡π™♠單的(de)示例，演示了(le)如(rú)何在C#中實現(xiàn)一(yī)個(gè)簡Ω÷"↔單的(de)區(qū)塊鏈數(shù)據存儲：

```csharp

using System;

using System.Collections.Generic♠₹§;

using System.Security.Cryptography;

public class Block

{

public int Index { get;™ set; }

public DateTime T∑imestamp { get; set; }

public string•∞£ Data { get; set; }

public string PreviousHa₩↕ sh { get; set; }

public string ✘δHash { get; set; }

}

public class Blockchain

{

private List<Block> chain;

public Blockchai→×γn()

{

chain = n≥≈≥γew List<Block>();

// 創建創世•φ區(qū)塊

Addα™GenesisBlock();

}

private void AddGenesisBlock()

{

chain.Add(new☆β' Block

{

≤εσ∑ Index = 0,

&nbs←∞§∑p; Timestamp = DateTimeαλδ.Now,

Data =€≈‍ "Genesis Block",

Previoφ∏usHash = null,

Ha $sh = CalculateHash(0, DateTime.N'™↓ow, "Genesis Block", null)

});

}

public void AddBlock(strin$₽g data)

{

v‌∑≤δar previousBlock = chain[chain.C✘ount - 1];

var ne π'☆wBlock = new Block

{

&nbβ→sp; Index = previousB>&lock.Index + 1,

→λαTimestamp = DateTime.Now,

&n•↔↕∞bsp; Data = data,

$≥γ PreviousHash = previo≥¶♠≤usBlock.Hash,

¥ ≤; Hash = CalculateHash(previousBlock.‍∑Ω‍Index + 1, DateTime.Now, data, previousλδ♦Block.Hash)

};

chain.Add(newB ↓★lock);

}

private string Calc™↔ulateHash(int index, DateTime ti‌>÷♥mestamp, string data, string λγpreviousHash)

{

SHA256 sha256 = SHA2✘♣£β56.Create();

byte[] inputBytes =•α System.Text.Encoding.ASCII.GetBytes(index.ToStri♣₩♦ng() + timestamp.ToString() +<±∏← data + previousHash);

byte[] outputBytesα≤♠ = sha256.ComputeHash(inputB∞≠πytes);

return C↑¥onvert.ToBase64String(outputBytes);

}

{

for (int i "☆= 1; i < chain.Count; i++)

{

÷<÷ var currentBlock = chain[i];

&nλδ→ bsp; var previousBlock ≥££= chain[i - 1];

&n ¶•λbsp; if (currentBlock.Hash != &£CalculateHash(currentBlock.Index, currentBlock.T↑ε₩imestamp, currentBlock.Data, currentBlo∑→ck.PreviousHash))

{

∑α≠Ω; return♥ π false;

&nb§ ‍sp; }

&nb€φsp; if (currentBlock.PreviousHash×ε♥× != previousBlock.Hash)

{≠¶™↓

&n☆<•>bsp; return fal >se;

}

retu∏¥§rn true;

}

```

在這(zhè)個(gè)示例中，我們創建了(le)一(yī)個(gè≤₩)簡單的(de)`Block`類來(lái)表示區(q®"ū)塊，以及一(yī)個(gè)`Blockchain`類來(láiβ∏‌)表示整個(gè)區(qū)塊鏈。在`Blockchain`類中¶•，我們使用(yòng)了(le)一(yī)個(gè)`List<Block&g♠★t;`來(lái)存儲區(qū)塊鏈中的(de)所有(yǒu)區(qū)塊。我們還(hái)∑≥¥實現(xiàn)了(le)添加新區(qū)塊的(de)方法`AddB<↔lock`，以及驗證區(qū)塊鏈是(shì)否有(yǒu)效的(de)方法`IsChainVa ≥lid`。

在實際的(de)應用(yòng)中，你(nǐ)可(kě)以将區(qū)塊鏈的'✔♠≈(de)數(shù)據存儲在文(wén)件(jiàn)或者數(shù)據庫中。¶↕©$例如(rú)，你(nǐ)可(kě)以将每個(gè)區‍<∑(qū)塊存儲為(wèi)一(yī)個(gè)文(wén)件(jiàn)，或÷♣✔者将區(qū)塊鏈數(shù)據存儲在關系型數(shù)據庫或者NoSQL數(shù)♦<↔∞據庫中。這(zhè)樣就(jiù)可(kě)以實現(xiàn)在C#中對(duì)ε→§區(qū)塊鏈的(de)數(shù)據進行(xíng)存儲和(hé)管理(lǐ)。↑ &