lnd.xprv/shell.go

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package main
import (
"bufio"
"fmt"
"log"
"os"
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"sort"
"strconv"
"strings"
"github.com/roasbeef/btcd/chaincfg"
"github.com/roasbeef/btcutil"
"github.com/lightningnetwork/lnd/uspv"
)
/* this is a CLI shell for testing out LND. Right now it's only for uspv
testing. It can send and receive coins.
*/
const (
keyFileName = "testkey.hex"
headerFileName = "headers.bin"
dbFileName = "utxo.db"
// this is my local testnet node, replace it with your own close by.
// Random internet testnet nodes usually work but sometimes don't, so
// maybe I should test against different versions out there.
SPVHostAdr = "127.0.0.1:28333"
)
var (
Params = &chaincfg.SegNet4Params
SCon uspv.SPVCon // global here for now
)
func shell(SPVHostAdr string, Params *chaincfg.Params) {
fmt.Printf("LND spv shell v0.0\n")
fmt.Printf("Not yet well integrated, but soon.\n")
// read key file (generate if not found)
rootPriv, err := uspv.ReadKeyFileToECPriv(keyFileName, Params)
if err != nil {
log.Fatal(err)
}
// setup TxStore first (before spvcon)
Store := uspv.NewTxStore(rootPriv, Params)
// setup spvCon
SCon, err = uspv.OpenSPV(
SPVHostAdr, headerFileName, dbFileName, &Store, true, false, Params)
if err != nil {
log.Fatal(err)
}
tip, err := SCon.TS.GetDBSyncHeight() // ask for sync height
if err != nil {
log.Fatal(err)
}
if tip == 0 { // DB has never been used, set to birthday
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tip = 21900 // hardcoded; later base on keyfile date?
err = SCon.TS.SetDBSyncHeight(tip)
if err != nil {
log.Fatal(err)
}
}
// once we're connected, initiate headers sync
err = SCon.AskForHeaders()
if err != nil {
log.Fatal(err)
}
// main shell loop
for {
// setup reader with max 4K input chars
reader := bufio.NewReaderSize(os.Stdin, 4000)
fmt.Printf("LND# ") // prompt
msg, err := reader.ReadString('\n') // input finishes on enter key
if err != nil {
log.Fatal(err)
}
cmdslice := strings.Fields(msg) // chop input up on whitespace
if len(cmdslice) < 1 {
continue // no input, just prompt again
}
fmt.Printf("entered command: %s\n", msg) // immediate feedback
err = Shellparse(cmdslice)
if err != nil { // only error should be user exit
log.Fatal(err)
}
}
return
}
// Shellparse parses user input and hands it to command functions if matching
func Shellparse(cmdslice []string) error {
var err error
var args []string
cmd := cmdslice[0]
if len(cmdslice) > 1 {
args = cmdslice[1:]
}
if cmd == "exit" || cmd == "quit" {
return fmt.Errorf("User exit")
}
// help gives you really terse help. Just a list of commands.
if cmd == "help" {
err = Help(args)
if err != nil {
fmt.Printf("help error: %s\n", err)
}
return nil
}
// adr generates a new address and displays it
if cmd == "adr" {
err = Adr(args)
if err != nil {
fmt.Printf("adr error: %s\n", err)
}
return nil
}
// bal shows the current set of utxos, addresses and score
if cmd == "bal" {
err = Bal(args)
if err != nil {
fmt.Printf("bal error: %s\n", err)
}
return nil
}
// send sends coins to the address specified
if cmd == "send" {
err = Send(args)
if err != nil {
fmt.Printf("send error: %s\n", err)
}
return nil
}
if cmd == "fan" {
err = Fan(args)
if err != nil {
fmt.Printf("fan error: %s\n", err)
}
return nil
}
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if cmd == "sweep" {
err = Sweep(args)
if err != nil {
fmt.Printf("sweep error: %s\n", err)
}
return nil
}
if cmd == "txs" {
err = Txs(args)
if err != nil {
fmt.Printf("txs error: %s\n", err)
}
return nil
}
if cmd == "blk" {
err = Blk(args)
if err != nil {
fmt.Printf("blk error: %s\n", err)
}
return nil
}
fmt.Printf("Command not recognized. type help for command list.\n")
return nil
}
func Txs(args []string) error {
alltx, err := SCon.TS.GetAllTxs()
if err != nil {
return err
}
for i, tx := range alltx {
fmt.Printf("tx %d %s\n", i, uspv.TxToString(tx))
}
return nil
}
func Blk(args []string) error {
if SCon.RBytes == 0 {
return fmt.Errorf("Can't check block, spv connection broken")
}
if len(args) == 0 {
return fmt.Errorf("must specify height")
}
height, err := strconv.ParseInt(args[0], 10, 32)
if err != nil {
return err
}
// request most recent block just to test
err = SCon.AskForOneBlock(int32(height))
if err != nil {
return err
}
return nil
}
// Bal prints out your score.
func Bal(args []string) error {
if SCon.TS == nil {
return fmt.Errorf("Can't get balance, spv connection broken")
}
fmt.Printf(" ----- Account Balance ----- \n")
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rawUtxos, err := SCon.TS.GetAllUtxos()
if err != nil {
return err
}
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var allUtxos uspv.SortableUtxoSlice
for _, utxo := range rawUtxos {
allUtxos = append(allUtxos, *utxo)
}
// smallest and unconfirmed last (because it's reversed)
sort.Sort(sort.Reverse(allUtxos))
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var score, confScore int64
for i, u := range allUtxos {
fmt.Printf("\tutxo %d height %d %s key:%d amt %d",
i, u.AtHeight, u.Op.String(), u.KeyIdx, u.Value)
if u.IsWit {
fmt.Printf(" WIT")
}
fmt.Printf("\n")
score += u.Value
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if u.AtHeight != 0 {
confScore += u.Value
}
}
height, _ := SCon.TS.GetDBSyncHeight()
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atx, err := SCon.TS.GetAllTxs()
stxos, err := SCon.TS.GetAllStxos()
for i, a := range SCon.TS.Adrs {
wa, err := btcutil.NewAddressWitnessPubKeyHash(
a.PkhAdr.ScriptAddress(), Params)
if err != nil {
return err
}
fmt.Printf("address %d %s OR %s\n", i, a.PkhAdr.String(), wa.String())
}
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fmt.Printf("Total known txs: %d\n", len(atx))
fmt.Printf("Known utxos: %d\tPreviously spent txos: %d\n",
len(allUtxos), len(stxos))
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fmt.Printf("Total coin: %d confirmed: %d\n", score, confScore)
fmt.Printf("DB sync height: %d\n", height)
return nil
}
// Adr makes a new address.
func Adr(args []string) error {
// if there's an arg, make 10 adrs
if len(args) > 0 {
for i := 0; i < 10; i++ {
_, err := SCon.TS.NewAdr()
if err != nil {
return err
}
}
}
if len(args) > 1 {
for i := 0; i < 1000; i++ {
_, err := SCon.TS.NewAdr()
if err != nil {
return err
}
}
}
// always make one
a, err := SCon.TS.NewAdr()
if err != nil {
return err
}
fmt.Printf("made new address %s\n",
a.String())
return nil
}
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// Sweep sends every confirmed uxto in your wallet to an address.
// it does them all individually to there are a lot of txs generated.
// syntax: sweep adr
func Sweep(args []string) error {
if len(args) < 2 {
return fmt.Errorf("sweep syntax: sweep adr")
}
adr, err := btcutil.DecodeAddress(args[0], SCon.TS.Param)
if err != nil {
fmt.Printf("error parsing %s as address\t", args[0])
return err
}
numTxs, err := strconv.ParseInt(args[1], 10, 64)
if err != nil {
return err
}
if numTxs < 1 {
return fmt.Errorf("can't send %d txs", numTxs)
}
rawUtxos, err := SCon.TS.GetAllUtxos()
if err != nil {
return err
}
var allUtxos uspv.SortableUtxoSlice
for _, utxo := range rawUtxos {
allUtxos = append(allUtxos, *utxo)
}
// smallest and unconfirmed last (because it's reversed)
sort.Sort(sort.Reverse(allUtxos))
for i, u := range allUtxos {
if u.AtHeight != 0 {
err = SCon.SendOne(allUtxos[i], adr)
if err != nil {
return err
}
numTxs--
if numTxs == 0 {
return nil
}
}
}
fmt.Printf("spent all confirmed utxos; not enough by %d\n", numTxs)
return nil
}
// Fan generates a bunch of fanout. Only for testing, can be expensive.
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// syntax: fan adr numOutputs valOutputs witty
func Fan(args []string) error {
if len(args) < 3 {
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return fmt.Errorf("fan syntax: fan adr numOutputs valOutputs")
}
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adr, err := btcutil.DecodeAddress(args[0], SCon.TS.Param)
if err != nil {
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fmt.Printf("error parsing %s as address\t", args[0])
return err
}
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numOutputs, err := strconv.ParseInt(args[1], 10, 64)
if err != nil {
return err
}
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valOutputs, err := strconv.ParseInt(args[2], 10, 64)
if err != nil {
return err
}
adrs := make([]btcutil.Address, numOutputs)
amts := make([]int64, numOutputs)
for i := int64(0); i < numOutputs; i++ {
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adrs[i] = adr
amts[i] = valOutputs + i
}
return SCon.SendCoins(adrs, amts)
}
// Send sends coins.
func Send(args []string) error {
if SCon.RBytes == 0 {
return fmt.Errorf("Can't send, spv connection broken")
}
// get all utxos from the database
allUtxos, err := SCon.TS.GetAllUtxos()
if err != nil {
return err
}
var score int64 // score is the sum of all utxo amounts. highest score wins.
// add all the utxos up to get the score
for _, u := range allUtxos {
score += u.Value
}
// score is 0, cannot unlock 'send coins' acheivement
if score == 0 {
return fmt.Errorf("You don't have money. Work hard.")
}
// need args, fail
if len(args) < 2 {
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return fmt.Errorf("need args: ssend address amount(satoshis) wit?")
}
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adr, err := btcutil.DecodeAddress(args[0], SCon.TS.Param)
if err != nil {
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fmt.Printf("error parsing %s as address\t", args[0])
return err
}
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amt, err := strconv.ParseInt(args[1], 10, 64)
if err != nil {
return err
}
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if amt < 1000 {
return fmt.Errorf("can't send %d, too small", amt)
}
fmt.Printf("send %d to address: %s \n",
amt, adr.String())
var adrs []btcutil.Address
var amts []int64
adrs = append(adrs, adr)
amts = append(amts, amt)
err = SCon.SendCoins(adrs, amts)
if err != nil {
return err
}
return nil
}
func Help(args []string) error {
fmt.Printf("commands:\n")
fmt.Printf("help adr bal send exit\n")
return nil
}