97 lines
1.8 KiB
Go
97 lines
1.8 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"os"
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"runtime"
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"strconv"
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"github.com/SowinskiBraeden/golang-blockchain/blockchain"
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)
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type CommandLine struct {
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blockchain *blockchain.BlockChain
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}
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func (cli *CommandLine) printUsage() {
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fmt.Println("Usage:")
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fmt.Println(" add -block BLOCK_DATA - add a block to the chain")
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fmt.Println(" print - Prints the blocks in the chain")
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}
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func (cli *CommandLine) validateArgs() {
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if len(os.Args) < 2 {
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cli.printUsage()
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runtime.Goexit()
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}
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}
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func (cli *CommandLine) addBlock(data string) {
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cli.blockchain.AddBlock(data)
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fmt.Println("Added Block!")
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}
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func (cli *CommandLine) run() {
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cli.validateArgs()
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addBlockCmd := flag.NewFlagSet("add", flag.ExitOnError)
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printChainCmd := flag.NewFlagSet("print", flag.ExitOnError)
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addBlockData := addBlockCmd.String("block", "", "Block data")
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switch os.Args[1] {
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case "add":
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err := addBlockCmd.Parse(os.Args[2:])
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blockchain.Handle(err)
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case "print":
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err := printChainCmd.Parse(os.Args[2:])
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blockchain.Handle(err)
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default:
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cli.printUsage()
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runtime.Goexit()
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}
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if addBlockCmd.Parsed() {
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if *addBlockData == "" {
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addBlockCmd.Usage()
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runtime.Goexit()
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}
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cli.addBlock(*addBlockData)
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}
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if printChainCmd.Parsed() {
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cli.printChain()
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}
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}
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func (cli *CommandLine) printChain() {
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iter := cli.blockchain.Iterator()
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for {
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block := iter.Next()
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fmt.Printf("Prev. Hash: %x\n", block.PrevHash)
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fmt.Printf("Data: %s\n", block.Data)
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fmt.Printf("Hash: %x\n", block.Hash)
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pow := blockchain.NewProof(block)
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fmt.Printf("PoW: %s\n", strconv.FormatBool(pow.Validate()))
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fmt.Println()
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if len(block.PrevHash) == 0 {
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break
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}
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}
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}
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func main() {
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defer os.Exit(0)
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chain := blockchain.InitBlockChain()
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defer chain.Database.Close()
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cli := CommandLine{chain}
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cli.run()
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}
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