/
cli.go
145 lines (121 loc) · 3.06 KB
/
cli.go
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package main
import (
"flag"
"fmt"
"log"
"os"
"strconv"
)
type CLI struct {}
func (cli *CLI) CLCreateChain(address string) {
chain := CreateChain(address)
chain.db.Close()
fmt.Println("Created chain.")
}
func (cli *CLI) GetBalance(address string) {
chain := NewChain(address)
defer chain.db.Close()
balance := 0
UTxnsO := chain.FindUTxnsO(address)
for _, out := range UTxnsO {
balance += out.Value
}
fmt.Printf("Balance of '%s': %d\n", address, balance)
}
func (cli *CLI) PrintUsage() {
fmt.Println("Usage:")
fmt.Println(" print -> print data of all blocks on the chain")
fmt.Println(" balance -addr <address> -> get balance of specified address")
fmt.Println(" create -addr <address> -> create chain and send genesis reward to specified address")
fmt.Println(" send -from <from_address> -to <to_address> -amt <amount> -> send amount from address to another")
}
func (cli *CLI) ValidateArgs() {
if len(os.Args) < 2 {
cli.PrintUsage()
os.Exit(1)
}
}
func (cli *CLI) PrintChain() {
chain := NewChain("")
defer chain.db.Close()
iter := chain.Iterator()
for {
block := iter.Next()
fmt.Printf("Previous Hash: %x\n", block.PrevHash)
fmt.Printf("Current Hash: %x\n", block.CurrHash)
pow := NewProof(block)
fmt.Printf("Proof-of-Work Valid: %s\n", strconv.FormatBool(pow.ValidatePOW()))
fmt.Println()
if len(block.PrevHash) == 0 {
break
}
}
}
func (cli *CLI) Send(from, to string, amount int) {
chain := NewChain(from)
defer chain.db.Close()
tx := NewUTOTxn(from, to, amount, chain)
chain.MineBlock([]*Txn{tx})
fmt.Println("Success.")
}
func (cli *CLI) Run() {
cli.ValidateArgs()
balanceCMD := flag.NewFlagSet("balance", flag.ExitOnError)
createCMD := flag.NewFlagSet("create", flag.ExitOnError)
sendCMD := flag.NewFlagSet("send", flag.ExitOnError)
printCMD := flag.NewFlagSet("print", flag.ExitOnError)
balanceAddr := balanceCMD.String("addr", "", "Address to get balance for.")
createAddr:= createCMD.String("addr", "", "Address to send genesis reward to.")
sendFrom := sendCMD.String("from", "", "Source wallet address.")
sendTo := sendCMD.String("to", "", "Destination wallet address.")
sendAmt := sendCMD.Int("amt", 0, "Amount to send.")
switch os.Args[1] {
case "balance":
err := balanceCMD.Parse(os.Args[2:])
if err != nil {
log.Panic(err)
}
case "create":
err := createCMD.Parse(os.Args[2:])
if err != nil {
log.Panic(err)
}
case "print":
err := printCMD.Parse(os.Args[2:])
if err != nil {
log.Panic(err)
}
case "send":
err := sendCMD.Parse(os.Args[2:])
if err != nil {
log.Panic(err)
}
default:
cli.PrintUsage()
os.Exit(1)
}
if balanceCMD.Parsed() {
if *balanceAddr == "" {
balanceCMD.Usage()
os.Exit(1)
}
cli.GetBalance(*balanceAddr)
}
if createCMD.Parsed() {
if *createAddr == "" {
createCMD.Usage()
os.Exit(1)
}
cli.CLCreateChain(*createAddr)
}
if printCMD.Parsed() {
cli.PrintChain()
}
if sendCMD.Parsed() {
if *sendFrom == "" || *sendTo == "" || *sendAmt <= 0 {
sendCMD.Usage()
os.Exit(1)
}
cli.Send(*sendFrom, *sendTo, *sendAmt)
}
}