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add blockchain reindexing to cli #23

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add blockchain reindexing to cli #23

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44 changes: 40 additions & 4 deletions cli/cli.go
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ func (cli *CommandLine) printUsage() {
fmt.Println(" send -from FROM -to TO -amount AMOUNT - Send amount of coins")
fmt.Println(" createwallet - Creates a new Wallet")
fmt.Println(" listaddresses - Lists the addresses in our wallet file")
fmt.Println(" reindexutxo - Rebuilds the UTXO set")
}

func (cli *CommandLine) validateArgs() {
Expand Down Expand Up @@ -60,6 +61,9 @@ func (cli *CommandLine) printChain() {
fmt.Printf("Hash: %x\n", block.Hash)
pow := blockchain.NewProof(block)
fmt.Printf("PoW: %s\n", strconv.FormatBool(pow.Validate()))
for _, tx := range block.Transactions {
fmt.Println(tx)
}
fmt.Println()

if len(block.PrevHash) == 0 {
Expand All @@ -69,8 +73,15 @@ func (cli *CommandLine) printChain() {
}

func (cli *CommandLine) createBlockChain(address string) {
if !wallet.ValidateAddress(address) {
log.Panic("Address is not Valid")
}
chain := blockchain.InitBlockChain(address)
chain.Database.Close()

UTXOSet := blockchain.UTXOSet{Blockchain: chain}
UTXOSet.Reindex()

fmt.Println("Finished!")
}

Expand All @@ -79,12 +90,13 @@ func (cli *CommandLine) getBalance(address string) {
log.Panic("Address is not Valid")
}
chain := blockchain.ContinueBlockChain(address)
UTXOSet := blockchain.UTXOSet{Blockchain: chain}
defer chain.Database.Close()

balance := 0
pubKeyHash := wallet.Base58Decode([]byte(address))
pubKeyHash = pubKeyHash[1 : len(pubKeyHash) - 4]
UTXOs := chain.FindUTXO(pubKeyHash)
UTXOs := UTXOSet.FindUnspentTransactions(pubKeyHash)

for _, out := range UTXOs {
balance += out.Value
Expand All @@ -94,11 +106,20 @@ func (cli *CommandLine) getBalance(address string) {
}

func (cli *CommandLine) send(from, to string, amount int) {
if !wallet.ValidateAddress(to) {
log.Panic("Address is not Valid")
}
if !wallet.ValidateAddress(from) {
log.Panic("Address is not Valid")
}
chain := blockchain.ContinueBlockChain(from)
UTXOSet := blockchain.UTXOSet{Blockchain: chain}
defer chain.Database.Close()

tx := blockchain.NewTransaction(from, to, amount, chain)
chain.AddBlock([]*blockchain.Transaction{tx})
tx := blockchain.NewTransaction(from, to, amount, &UTXOSet)
cbTx := blockchain.CoinbaseTx(from, "")
block := chain.AddBlock([]*blockchain.Transaction{cbTx, tx})
UTXOSet.Update(block)
fmt.Println("Success!")
}

Expand All @@ -111,7 +132,7 @@ func (cli *CommandLine) Run() {
printChainCmd := flag.NewFlagSet("printchain", flag.ExitOnError)
createWalletCmd := flag.NewFlagSet("createwallet", flag.ExitOnError)
listAddressesCmd := flag.NewFlagSet("listaddresses", flag.ExitOnError)

reindexUTXOCmd := flag.NewFlagSet("reindexutxo", flag.ExitOnError)

getBalanceAddress := getBalanceCmd.String("address", "", "The address to get balance for")
createBlockchainAddress := createBlockchainCmd.String("address", "", "The address to send genesis block reward to")
Expand Down Expand Up @@ -150,6 +171,11 @@ func (cli *CommandLine) Run() {
if err != nil {
log.Panic(err)
}
case "reindexutxo":
err := reindexUTXOCmd.Parse(os.Args[2:])
if err != nil {
log.Panic(err)
}
default:
cli.printUsage()
runtime.Goexit()
Expand Down Expand Up @@ -191,3 +217,13 @@ func (cli *CommandLine) Run() {
cli.send(*sendFrom, *sendTo, *sendAmount)
}
}

func (cli *CommandLine) reindexUTXO() {
chain := blockchain.ContinueBlockChain("")
defer chain.Database.Close()
UTXOSet := blockchain.UTXOSet{Blockchain: chain}
UTXOSet.Reindex()

count := UTXOSet.CountTransactions()
fmt.Printf("Done! There are %d transactions in the UTXO set.\n", count)
}