{"id":2807,"date":"2024-11-03T08:45:13","date_gmt":"2024-11-03T05:45:13","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/golang-ile-basit-bir-blockchain-nasil-olusturulur\/"},"modified":"2024-11-03T08:45:13","modified_gmt":"2024-11-03T05:45:13","slug":"golang-ile-basit-bir-blockchain-nasil-olusturulur","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/golang-ile-basit-bir-blockchain-nasil-olusturulur\/","title":{"rendered":"Golang ile Basit Bir Blockchain Nas\u0131l Olu\u015fturulur?"},"content":{"rendered":"<p>Golang ile Basit Bir Blockchain Nas\u0131l Olu\u015fturulur?<\/p>\n<p>Blockchain teknolojisi, son y\u0131llarda b\u00fcy\u00fck bir ilgi ve heyecan yarat\u0131yor. Kripto para birimlerinden dijital kimliklere kadar \u00e7e\u015fitli alanlarda kullan\u0131lmaya ba\u015flanan blockchain, g\u00fcvenli ve \u015feffaf bir veri depolama ve i\u015flem sistemi sunuyor. Bu makalede, Golang programlama dili kullanarak basit bir blockchain nas\u0131l olu\u015fturulaca\u011f\u0131n\u0131 ad\u0131m ad\u0131m inceleyece\u011fiz. <\/p>\n<h2>Blockchain Nedir?<\/h2>\n<p>Blockchain, temelde da\u011f\u0131t\u0131k ve de\u011fi\u015ftirilemez bir veri defteridir. Blok ad\u0131 verilen veri gruplar\u0131ndan olu\u015fur ve her blok, \u00f6nceki bloklar\u0131 i\u00e7eren bir ba\u011flant\u0131 ile g\u00fcvenli bir \u015fekilde birbirine ba\u011flan\u0131r. Bu yap\u0131, verilerin de\u011fi\u015ftirilmesini veya sahtekarl\u0131k yap\u0131lmas\u0131n\u0131 neredeyse imkans\u0131z hale getirir.<\/p>\n<h2>Golang ile Blockchain Olu\u015fturma Ad\u0131mlar\u0131<\/h2>\n<p>\u015eimdi, Golang kullanarak basit bir blockchain olu\u015fturma ad\u0131mlar\u0131n\u0131 inceleyelim:<\/p>\n<h3>1. Blok Yap\u0131s\u0131n\u0131 Tan\u0131mlama<\/h3>\n<p>\u00d6ncelikle, bloklar\u0131m\u0131z\u0131n hangi bilgileri i\u00e7erece\u011fini tan\u0131mlamal\u0131y\u0131z. Her blok, bir zaman damgas\u0131, \u00f6nceki blo\u011fun karma de\u011feri (hash), i\u015flem verileri ve bir karma de\u011fer i\u00e7erebilir.<\/p>\n<p>&#8220;`go<br \/>\ntype Block struct {<br \/>\n    Timestamp     int64<br \/>\n    PreviousHash  []byte<br \/>\n    Transactions  [][]byte<br \/>\n    Hash         []byte<br \/>\n}<br \/>\n&#8220;`<\/p>\n<h3>2. Karma De\u011fer Hesaplama<\/h3>\n<p>Her blo\u011fun benzersiz bir kimli\u011fi olmas\u0131n\u0131 sa\u011flamak i\u00e7in karma de\u011fer kullanaca\u011f\u0131z. Golang&#8217;\u0131n `crypto\/sha256` paketi bu i\u015flem i\u00e7in kullan\u0131labilmektedir.<\/p>\n<p>&#8220;`go<br \/>\nimport &#8220;crypto\/sha256&#8221;<\/p>\n<p>func calculateHash(block *Block) []byte {<br \/>\n    record := strconv.Itoa(int(block.Timestamp)) + string(block.PreviousHash) + string(block.Transactions)<br \/>\n    hash := sha256.Sum256([]byte(record))<br \/>\n    return hash[:]<br \/>\n}<br \/>\n&#8220;`<\/p>\n<h3>3. Genesis Blo\u011fu Olu\u015fturma<\/h3>\n<p>Bir blockchain&#8217;in ba\u015flang\u0131\u00e7 noktas\u0131n\u0131 olu\u015fturmak i\u00e7in bir genesis blo\u011fu olu\u015fturmam\u0131z gerekiyor. Bu blok, ilk blok olarak kabul edilir ve \u00f6ncesinde bir blok olmad\u0131\u011f\u0131 i\u00e7in \u00f6nceki karma de\u011feri bo\u015f olur.<\/p>\n<p>&#8220;`go<br \/>\nfunc createGenesisBlock() *Block {<br \/>\n    return &#038;Block{<br \/>\n        Timestamp:     time.Now().Unix(),<br \/>\n        PreviousHash:  []byte{},<br \/>\n        Transactions:  [][]byte{},<br \/>\n        Hash:         calculateHash(&#038;Block{}),<br \/>\n    }<br \/>\n}<br \/>\n&#8220;`<\/p>\n<h3>4. Yeni Bir Blok Ekleme<\/h3>\n<p>Yeni i\u015flemler yap\u0131ld\u0131\u011f\u0131nda, bu i\u015flemleri i\u00e7eren yeni bir blok olu\u015fturmam\u0131z ve mevcut zincirin sonuna eklememiz gerekiyor.<\/p>\n<p>&#8220;`go<br \/>\nfunc addBlock(newBlock *Block, blockchain []*Block) []*Block {<br \/>\n    newBlock.PreviousHash = blockchain[len(blockchain)-1].Hash<br \/>\n    newBlock.Hash = calculateHash(newBlock)<br \/>\n    blockchain = append(blockchain, newBlock)<br \/>\n    return blockchain<br \/>\n}<br \/>\n&#8220;`<\/p>\n<h3>5. Blockchain&#8217;i Depolama<\/h3>\n<p>Blockchain&#8217;imizi kal\u0131c\u0131 hale getirmek i\u00e7in bir dosyaya veya bir veritaban\u0131na kaydetmemiz gerekir. Golang&#8217;\u0131n `encoding\/json` paketi, JSON format\u0131nda kaydetme ve y\u00fckleme i\u015flemlerini kolayla\u015ft\u0131rmaktad\u0131r.<\/p>\n<p>&#8220;`go<br \/>\nimport &#8220;encoding\/json&#8221;<\/p>\n<p>func saveBlockchain(blockchain []*Block, filename string) error {<br \/>\n    data, err := json.MarshalIndent(blockchain, &#8220;&#8221;, &#8221;  &#8220;)<br \/>\n    if err != nil {<br \/>\n        return err<br \/>\n    }<br \/>\n    return ioutil.WriteFile(filename, data, 0644)<br \/>\n}<\/p>\n<p>func loadBlockchain(filename string) ([]*Block, error) {<br \/>\n    data, err := ioutil.ReadFile(filename)<br \/>\n    if err != nil {<br \/>\n        return nil, err<br \/>\n    }<br \/>\n    var blockchain []*Block<br \/>\n    err = json.Unmarshal(data, &#038;blockchain)<br \/>\n    if err != nil {<br \/>\n        return nil, err<br \/>\n    }<br \/>\n    return blockchain, nil<br \/>\n}<br \/>\n&#8220;`<\/p>\n<h2>\u00d6rnek Uygulama<\/h2>\n<p>Bu ad\u0131mlar\u0131 kullanarak basit bir blockchain uygulamas\u0131 olu\u015fturabiliriz. \u00d6rne\u011fin, bir `main.go` dosyas\u0131 olu\u015fturabilir ve a\u015fa\u011f\u0131daki gibi bir kod yazabiliriz:<\/p>\n<p>&#8220;`go<br \/>\npackage main<\/p>\n<p>import (<br \/>\n    &#8220;encoding\/json&#8221;<br \/>\n    &#8220;fmt&#8221;<br \/>\n    &#8220;io\/ioutil&#8221;<br \/>\n    &#8220;strconv&#8221;<br \/>\n    &#8220;time&#8221;<\/p>\n<p>    &#8220;crypto\/sha256&#8221;<br \/>\n)<\/p>\n<p>type Block struct {<br \/>\n    Timestamp     int64<br \/>\n    PreviousHash  []byte<br \/>\n    Transactions  [][]byte<br \/>\n    Hash         []byte<br \/>\n}<\/p>\n<p>func calculateHash(block *Block) []byte {<br \/>\n    record := strconv.Itoa(int(block.Timestamp)) + string(block.PreviousHash) + string(block.Transactions)<br \/>\n    hash := sha256.Sum256([]byte(record))<br \/>\n    return hash[:]<br \/>\n}<\/p>\n<p>func createGenesisBlock() *Block {<br \/>\n    return &#038;Block{<br \/>\n        Timestamp:     time.Now().Unix(),<br \/>\n        PreviousHash:  []byte{},<br \/>\n        Transactions:  [][]byte{},<br \/>\n        Hash:         calculateHash(&#038;Block{}),<br \/>\n    }<br \/>\n}<\/p>\n<p>func addBlock(newBlock *Block, blockchain []*Block) []*Block {<br \/>\n    newBlock.PreviousHash = blockchain[len(blockchain)-1].Hash<br \/>\n    newBlock.Hash = calculateHash(newBlock)<br \/>\n    blockchain = append(blockchain, newBlock)<br \/>\n    return blockchain<br \/>\n}<\/p>\n<p>func saveBlockchain(blockchain []*Block, filename string) error {<br \/>\n    data, err := json.MarshalIndent(blockchain, &#8220;&#8221;, &#8221;  &#8220;)<br \/>\n    if err != nil {<br \/>\n        return err<br \/>\n    }<br \/>\n    return ioutil.WriteFile(filename, data, 0644)<br \/>\n}<\/p>\n<p>func loadBlockchain(filename string) ([]*Block, error) {<br \/>\n    data, err := ioutil.ReadFile(filename)<br \/>\n    if err != nil {<br \/>\n        return nil, err<br \/>\n    }<br \/>\n    var blockchain []*Block<br \/>\n    err = json.Unmarshal(data, &#038;blockchain)<br \/>\n    if err != nil {<br \/>\n        return nil, err<br \/>\n    }<br \/>\n    return blockchain, nil<br \/>\n}<\/p>\n<p>func main() {<br \/>\n    blockchainFile := &#8220;blockchain.json&#8221;<br \/>\n    blockchain, err := loadBlockchain(blockchainFile)<br \/>\n    if err != nil {<br \/>\n        fmt.Println(&#8220;Blockchain y\u00fcklenemedi:&#8221;, err)<br \/>\n        blockchain = []*Block{createGenesisBlock()}<br \/>\n    }<\/p>\n<p>    for i := 0; i < 5; i++ {\n        newBlock := &#038;Block{\n            Timestamp:     time.Now().Unix(),\n            Transactions: [][]byte{[]byte(\"\u0130\u015flem \" + strconv.Itoa(i+1))},\n        }\n        blockchain = addBlock(newBlock, blockchain)\n        fmt.Println(\"Yeni blok eklendi:\", newBlock.Hash)\n    }\n\n    err = saveBlockchain(blockchain, blockchainFile)\n    if err != nil {\n        fmt.Println(\"Blockchain kaydedilemedi:\", err)\n    }\n}\n```\n\n\n\n<p>Bu \u00f6rnek kod, bir genesis blo\u011fu olu\u015fturur ve daha sonra 5 yeni blok ekler. Yeni bloklar, `blockchain.json` dosyas\u0131na kaydedilir.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>Bu makalede, Golang kullanarak basit bir blockchain olu\u015fturma ad\u0131mlar\u0131n\u0131 inceledik. Blockchain, g\u00fcvenli ve \u015feffaf veri depolama ve i\u015flem sistemleri olu\u015fturmak i\u00e7in kullan\u0131labilen g\u00fc\u00e7l\u00fc bir teknolojidir. Kendi blockchain&#8217;inizi olu\u015fturmak i\u00e7in bu basit \u00f6rne\u011fi bir temel olarak kullanabilir ve kendi ihtiya\u00e7lar\u0131n\u0131za g\u00f6re geli\u015ftirebilirsiniz.<\/p>\n<h2>Daha Fazla Bilgi \u0130\u00e7in<\/h2>\n<p>Blockchain teknolojisi hakk\u0131nda daha fazla bilgi edinmek isterseniz, a\u015fa\u011f\u0131daki kaynaklar\u0131 inceleyebilirsiniz:<\/p>\n<ul>\n<li><a href=\"https:\/\/www.blockchain.com\/en\/resources\/what-is-blockchain\">Blockchain.com<\/a><\/li>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Blockchain\">Wikipedia<\/a><\/li>\n<li><a href=\"https:\/\/fatihsoysal.com\">Fatih Soysal<\/a><\/li>\n<\/ul>\n<h2>#Etiketler<\/h2>\n<p>#Blockchain #Golang #Programlama #KriptoPara #Teknoloji #VeriDepolama #Da\u011f\u0131t\u0131kSistemler #G\u00fcvenlik #\u015eeffafl\u0131k<\/p>\n","protected":false},"excerpt":{"rendered":"Golang ile Basit Bir Blockchain Nas\u0131l Olu\u015fturulur? Blockchain teknolojisi, son y\u0131llarda b\u00fcy\u00fck bir ilgi ve heyecan yarat\u0131yor. Kripto&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-2807","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Golang ile Basit Bir Blockchain Nas\u0131l Olu\u015fturulur?<\/title>\n<meta name=\"description\" content=\"Blockchain teknolojisi, son y\u0131llarda b\u00fcy\u00fck bir ilgi ve heyecan yarat\u0131yor. Kripto para birimlerinden dijital kimliklere kadar \u00e7e\u015fitli alanlarda kullan\u0131lmaya ba\u015flanan blockchain, g\u00fcvenli ve \u015feffaf bir veri depolama ve i\u015flem sistemi sunuyor. Bu makalede, Golang programlama dili kullanarak basit bir blockchain nas\u0131l olu\u015fturulaca\u011f\u0131n\u0131 ad\u0131m ad\u0131m inceleyece\u011fiz.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/golang-ile-basit-bir-blockchain-nasil-olusturulur\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Golang ile Basit Bir Blockchain Nas\u0131l Olu\u015fturulur?\" \/>\n<meta property=\"og:description\" content=\"Blockchain teknolojisi, son y\u0131llarda b\u00fcy\u00fck bir ilgi ve heyecan yarat\u0131yor. 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Kripto para birimlerinden dijital kimliklere kadar \u00e7e\u015fitli alanlarda kullan\u0131lmaya ba\u015flanan blockchain, g\u00fcvenli ve \u015feffaf bir veri depolama ve i\u015flem sistemi sunuyor. Bu makalede, Golang programlama dili kullanarak basit bir blockchain nas\u0131l olu\u015fturulaca\u011f\u0131n\u0131 ad\u0131m ad\u0131m inceleyece\u011fiz.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/fatihsoysal.com\/blog\/golang-ile-basit-bir-blockchain-nasil-olusturulur\/","og_locale":"tr_TR","og_type":"article","og_title":"Golang ile Basit Bir Blockchain Nas\u0131l Olu\u015fturulur?","og_description":"Blockchain teknolojisi, son y\u0131llarda b\u00fcy\u00fck bir ilgi ve heyecan yarat\u0131yor. 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