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derohe-miniblock-mod/cmd/simulator/simulator.go
Captain 9202d01b75
DERO-HE STARGATE Testnet Release39
2022-01-26 10:05:01 +00:00

661 lines
22 KiB
Go
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// Copyright 2017-2021 DERO Project. All rights reserved.
// Use of this source code in any form is governed by RESEARCH license.
// license can be found in the LICENSE file.
// GPG: 0F39 E425 8C65 3947 702A 8234 08B2 0360 A03A 9DE8
//
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package main
import "io"
import "os"
import "time"
import "fmt"
import "bytes"
import "errors"
import "strings"
import "strconv"
import "runtime"
import "os/signal"
//import "crypto/sha1"
import "encoding/hex"
import "encoding/json"
import "path/filepath"
import "runtime/pprof"
import "github.com/go-logr/logr"
//import "golang.org/x/crypto/sha3"
import "github.com/chzyer/readline"
import "github.com/docopt/docopt-go"
import "gopkg.in/natefinch/lumberjack.v2"
import "github.com/deroproject/derohe/p2p"
import "github.com/deroproject/derohe/globals"
import "github.com/deroproject/derohe/config"
import "github.com/deroproject/derohe/rpc"
import "github.com/deroproject/derohe/blockchain"
//import "github.com/deroproject/derohe/transaction"
import derodrpc "github.com/deroproject/derohe/cmd/derod/rpc"
//import "github.com/deroproject/derosuite/checkpoints"
import "github.com/deroproject/derohe/cryptography/crypto"
//import "github.com/deroproject/derosuite/cryptonight"
//import "github.com/deroproject/derosuite/crypto/ringct"
//import "github.com/deroproject/derohe/blockchain/rpcserver"
import "github.com/deroproject/derohe/walletapi"
import "github.com/deroproject/derohe/cmd/explorer/explorerlib"
var command_line string = `simulator
DERO : A secure, private blockchain with smart-contracts
Simulates DERO block single node which helps in development and tests
Usage:
simulator [--help] [--version] [--testnet] [--debug] [--noautomine] [--sync-node] [--data-dir=<directory>] [--rpc-bind=<127.0.0.1:9999>] [--http-address=<0.0.0.0:8080>] [--clog-level=1] [--flog-level=1]
simulator -h | --help
simulator --version
Options:
-h --help Show this screen.
--version Show version.
--testnet Run in testnet mode.
--debug Debug mode enabled, print more log messages
--noautomine No blocks will be mined (except genesis), used for testing, supported only on linux
--clog-level=1 Set console log level (0 to 127)
--flog-level=1 Set file log level (0 to 127)
--data-dir=<directory> Store blockchain data at this location
--rpc-bind=<127.0.0.1:9999> daemon RPC listens on this ip:port
--http-address=<0.0.0.0:8080> explorer listens on this port to serve user requests
`
var Exit_In_Progress = make(chan bool)
var logger logr.Logger
var rpcport = "127.0.0.1:20000"
var TRIGGER_MINE_BLOCK string = "/dev/shm/mineblocknow"
const wallet_ports_start = 30000 // all wallets will rpc activated on ports
// this is a crude function used during tests
func Mine_block_single(chain *blockchain.Blockchain, miner_address rpc.Address) error {
var blid crypto.Hash
//if !chain.simulator{
// return fmt.Errorf("this function can only run in simulator mode")
//}
for {
bl, mbl, _, _, err := chain.Create_new_block_template_mining(miner_address)
if err != nil {
logger.Error(err, "err while request block template")
return err
}
if _, blid, _, err = chain.Accept_new_block(bl.Timestamp, mbl.Serialize()); err != nil {
logger.Error(err, "err while accepting block template")
return err
} else if !blid.IsZero() {
break
}
}
return nil
}
func main() {
var err error
globals.Arguments, err = docopt.Parse(command_line, nil, true, config.Version.String(), false)
if err != nil {
fmt.Printf("Error while parsing options err: %s\n", err)
return
}
if globals.Arguments["--rpc-bind"] != nil {
rpcport = globals.Arguments["--rpc-bind"].(string)
}
globals.Arguments["--rpc-bind"] = rpcport
globals.Arguments["--testnet"] = true
globals.Arguments["--simulator"] = true
globals.Arguments["--daemon-address"] = rpcport // feed it for wallets
// We need to initialize readline first, so it changes stderr to ansi processor on windows
l, err := readline.NewEx(&readline.Config{
//Prompt: "\033[92mDERO:\033[32m»\033[0m",
Prompt: "\033[92mDEROSIM:\033[32m>>>\033[0m ",
HistoryFile: filepath.Join(os.TempDir(), "derosim_readline.tmp"),
AutoComplete: completer,
InterruptPrompt: "^C",
EOFPrompt: "exit",
HistorySearchFold: true,
FuncFilterInputRune: filterInput,
})
if err != nil {
fmt.Printf("Error starting readline err: %s\n", err)
return
}
defer l.Close()
// parse arguments and setup logging , print basic information
exename, _ := os.Executable()
globals.InitializeLog(l.Stdout(), &lumberjack.Logger{
Filename: exename + ".log",
MaxSize: 100, // megabytes
MaxBackups: 2,
})
logger = globals.Logger.WithName("derod")
logger.Info("DERO HE Simulator : It is an alpha version, use it for testing/evaluations purpose only.")
logger.Info("Copyright 2017-2021 DERO Project. All rights reserved.")
logger.Info("", "OS", runtime.GOOS, "ARCH", runtime.GOARCH, "GOMAXPROCS", runtime.GOMAXPROCS(0))
logger.Info("", "Version", config.Version.String())
logger.V(1).Info("", "Arguments", globals.Arguments)
create_genesis_wallet() // create genesis
globals.Initialize() // setup network and proxy
params := map[string]interface{}{}
params["--simulator"] = true
globals.Arguments["--p2p-bind"] = ":0"
logger.V(0).Info("", "MODE", globals.Config.Name)
logger.V(0).Info("", "Daemon data directory", globals.GetDataDirectory())
os.RemoveAll(globals.GetDataDirectory()) // remove oldirectory
chain, err := blockchain.Blockchain_Start(params) //start chain in simulator mode
if err != nil {
logger.Error(err, "Error starting blockchain")
return
}
params["chain"] = chain
logger.Info("Disabled P2P server since we are a simulator")
p2p.P2P_Init(params)
rpcserver, _ := derodrpc.RPCServer_Start(params)
register_wallets(chain) // setup 22 wallets
Mine_block_single(chain, genesis_wallet.GetAddress()) //mine single block to confirm all 22 registrations
go walletapi.Keep_Connectivity() // all wallets maintain connectivity
// lets run the explorer at port 8080
if globals.Arguments["--http-address"] == nil {
globals.Arguments["--http-address"] = "127.0.0.1:8080"
}
if err = explorerlib.StartServer(logr.Discard(), rpcport, globals.Arguments["--http-address"].(string)); err != nil {
logger.Error(err, "could not start internal explorer")
}
go mine_block_auto(chain, genesis_wallet.GetAddress()) // automatically keep mining blocks
globals.Cron.Start() // start cron jobs
// This tiny goroutine continuously updates status as required
go func() {
last_our_height := int64(0)
last_best_height := int64(0)
last_peer_count := uint64(0)
last_topo_height := int64(0)
last_mempool_tx_count := 0
last_regpool_tx_count := 0
for {
select {
case <-Exit_In_Progress:
return
default:
}
our_height := chain.Get_Height()
best_height, best_topo_height := p2p.Best_Peer_Height()
peer_count := p2p.Peer_Count()
topo_height := chain.Load_TOPO_HEIGHT()
mempool_tx_count := len(chain.Mempool.Mempool_List_TX())
regpool_tx_count := len(chain.Regpool.Regpool_List_TX())
// only update prompt if needed
if last_our_height != our_height || last_best_height != best_height || last_peer_count != peer_count || last_topo_height != topo_height || last_mempool_tx_count != mempool_tx_count || last_regpool_tx_count != regpool_tx_count {
// choose color based on urgency
color := "\033[32m" // default is green color
if our_height < best_height {
color = "\033[33m" // make prompt yellow
} else if our_height > best_height {
color = "\033[31m" // make prompt red
}
pcolor := "\033[32m" // default is green color
if peer_count < 1 {
pcolor = "\033[31m" // make prompt red
} else if peer_count <= 8 {
pcolor = "\033[33m" // make prompt yellow
}
hash_rate_string := ""
hash_rate := chain.Get_Network_HashRate()
switch {
case hash_rate > 1000000000000:
hash_rate_string = fmt.Sprintf("%.1f TH/s", float64(hash_rate)/1000000000000.0)
case hash_rate > 1000000000:
hash_rate_string = fmt.Sprintf("%.1f GH/s", float64(hash_rate)/1000000000.0)
case hash_rate > 1000000:
hash_rate_string = fmt.Sprintf("%.1f MH/s", float64(hash_rate)/1000000.0)
case hash_rate > 1000:
hash_rate_string = fmt.Sprintf("%.1f KH/s", float64(hash_rate)/1000.0)
case hash_rate > 0:
hash_rate_string = fmt.Sprintf("%d H/s", hash_rate)
}
testnet_string := ""
if !globals.IsMainnet() {
testnet_string = "\033[31m TESTNET"
}
l.SetPrompt(fmt.Sprintf("\033[1m\033[32mDEROSIM HE: \033[0m"+color+"%d/%d [%d/%d] "+pcolor+"P %d TXp %d:%d \033[32mNW %s %s> >>\033[0m ", our_height, topo_height, best_height, best_topo_height, peer_count, mempool_tx_count, regpool_tx_count, hash_rate_string, testnet_string))
l.Refresh()
last_our_height = our_height
last_best_height = best_height
last_peer_count = peer_count
last_mempool_tx_count = mempool_tx_count
last_regpool_tx_count = regpool_tx_count
last_topo_height = best_topo_height
}
time.Sleep(1 * time.Second)
}
}()
setPasswordCfg := l.GenPasswordConfig()
setPasswordCfg.SetListener(func(line []rune, pos int, key rune) (newLine []rune, newPos int, ok bool) {
l.SetPrompt(fmt.Sprintf("Enter password(%v): ", len(line)))
l.Refresh()
return nil, 0, false
})
l.Refresh() // refresh the prompt
go func() {
var gracefulStop = make(chan os.Signal, 1)
signal.Notify(gracefulStop, os.Interrupt) // listen to all signals
for {
sig := <-gracefulStop
logger.Info("received signal", "signal", sig)
if sig.String() == "interrupt" {
close(Exit_In_Progress)
}
}
}()
for {
line, err := l.Readline()
if err == readline.ErrInterrupt {
if len(line) == 0 {
logger.Info("Ctrl-C received, Exit in progress")
close(Exit_In_Progress)
break
} else {
continue
}
} else if err == io.EOF {
<-Exit_In_Progress
break
}
line = strings.TrimSpace(line)
line_parts := strings.Fields(line)
command := ""
if len(line_parts) >= 1 {
command = strings.ToLower(line_parts[0])
}
switch {
case line == "help":
usage(l.Stderr())
case command == "profile": // writes cpu and memory profile
// TODO enable profile over http rpc to enable better testing/tracking
cpufile, err := os.Create(filepath.Join(globals.GetDataDirectory(), "cpuprofile.prof"))
if err != nil {
logger.Error(err, "Could not start cpu profiling.")
continue
}
if err := pprof.StartCPUProfile(cpufile); err != nil {
logger.Error(err, "could not start CPU profile")
}
logger.Info("CPU profiling will be available after program exits.", "path", filepath.Join(globals.GetDataDirectory(), "cpuprofile.prof"))
defer pprof.StopCPUProfile()
/*
memoryfile,err := os.Create(filepath.Join(globals.GetDataDirectory(), "memoryprofile.prof"))
if err != nil{
globals.Logger.Errorf("Could not start memory profiling, err %s", err)
continue
}
if err := pprof.WriteHeapProfile(memoryfile); err != nil {
globals.Logger.Warnf("could not start memory profile: ", err)
}
memoryfile.Close()
*/
case command == "regpool_print":
chain.Regpool.Regpool_Print()
case command == "regpool_flush":
chain.Regpool.Regpool_flush()
case command == "regpool_delete_tx":
if len(line_parts) == 2 && len(line_parts[1]) == 64 {
txid, err := hex.DecodeString(strings.ToLower(line_parts[1]))
if err != nil {
logger.Error(err, "err parsing txid")
continue
}
var hash crypto.Hash
copy(hash[:32], []byte(txid))
chain.Regpool.Regpool_Delete_TX(hash)
} else {
logger.Error(fmt.Errorf("regpool_delete_tx needs a single transaction id as argument"), "")
}
case command == "mempool_print":
chain.Mempool.Mempool_Print()
case command == "mempool_flush":
chain.Mempool.Mempool_flush()
case command == "mempool_delete_tx":
if len(line_parts) == 2 && len(line_parts[1]) == 64 {
txid, err := hex.DecodeString(strings.ToLower(line_parts[1]))
if err != nil {
logger.Error(err, "err parsing txid")
continue
}
var hash crypto.Hash
copy(hash[:32], []byte(txid))
chain.Mempool.Mempool_Delete_TX(hash)
} else {
logger.Error(fmt.Errorf("mempool_delete_tx needs a single transaction id as argument"), "")
}
case command == "version":
logger.Info("", "OS", runtime.GOOS, "ARCH", runtime.GOARCH, "GOMAXPROCS", runtime.GOMAXPROCS(0))
logger.Info("", "Version", config.Version.String())
case command == "print_tree": // prints entire block chain tree
//WriteBlockChainTree(chain, "/tmp/graph.dot")
case command == "print_block":
fmt.Printf("printing block\n")
if len(line_parts) == 2 && len(line_parts[1]) == 64 {
bl_raw, err := hex.DecodeString(strings.ToLower(line_parts[1]))
if err != nil {
fmt.Printf("err while decoding txid err %s\n", err)
continue
}
var hash crypto.Hash
copy(hash[:32], []byte(bl_raw))
bl, err := chain.Load_BL_FROM_ID(hash)
if err == nil {
fmt.Printf("Block ID : %s\n", hash)
fmt.Printf("Block : %x\n", bl.Serialize())
fmt.Printf("difficulty: %s\n", chain.Load_Block_Difficulty(hash).String())
//fmt.Printf("Orphan: %v\n",chain.Is_Block_Orphan(hash))
json_bytes, err := json.Marshal(bl)
fmt.Printf("%s err : %s\n", string(prettyprint_json(json_bytes)), err)
} else {
fmt.Printf("Err %s\n", err)
}
} else if len(line_parts) == 2 {
if s, err := strconv.ParseInt(line_parts[1], 10, 64); err == nil {
_ = s
// first load block id from topo height
hash, err := chain.Load_Block_Topological_order_at_index(s)
if err != nil {
fmt.Printf("Skipping block at topo height %d due to error %s\n", s, err)
continue
}
bl, err := chain.Load_BL_FROM_ID(hash)
if err == nil {
fmt.Printf("Block ID : %s\n", hash)
fmt.Printf("Block : %x\n", bl.Serialize())
fmt.Printf("difficulty: %s\n", chain.Load_Block_Difficulty(hash).String())
fmt.Printf("Height: %d\n", chain.Load_Height_for_BL_ID(hash))
fmt.Printf("TopoHeight: %d\n", s)
version, err := chain.ReadBlockSnapshotVersion(hash)
if err != nil {
panic(err)
}
bhash, err := chain.Load_Merkle_Hash(version)
if err != nil {
panic(err)
}
fmt.Printf("BALANCE_TREE : %s\n", bhash)
//fmt.Printf("Orphan: %v\n",chain.Is_Block_Orphan(hash))
json_bytes, err := json.Marshal(bl)
fmt.Printf("%s err : %s\n", string(prettyprint_json(json_bytes)), err)
} else {
fmt.Printf("Err %s\n", err)
}
} else {
fmt.Printf("print_block needs a single block id as argument\n")
}
}
case strings.ToLower(line) == "status":
// fmt.Printf("chain diff %d\n",chain.Get_Difficulty_At_Block(chain.Top_ID))
//fmt.Printf("chain nw rate %d\n", chain.Get_Network_HashRate())
inc, out := p2p.Peer_Direction_Count()
mempool_tx_count := len(chain.Mempool.Mempool_List_TX())
regpool_tx_count := len(chain.Regpool.Regpool_List_TX())
//supply := chain.Load_Already_Generated_Coins_for_Topo_Index(nil, chain.Load_TOPO_HEIGHT(nil))
supply := uint64(0)
if supply > (1000000 * 1000000000000) {
supply -= (1000000 * 1000000000000) // remove premine
}
fmt.Printf("Network %s Height %d NW Hashrate %0.03f MH/sec TH %s Peers %d inc, %d out MEMPOOL size %d REGPOOL %d Total Supply %s DERO \n", globals.Config.Name, chain.Get_Height(), float64(chain.Get_Network_HashRate())/1000000.0, chain.Get_Top_ID(), inc, out, mempool_tx_count, regpool_tx_count, globals.FormatMoney(supply))
// print hardfork status on second line
hf_state, _, _, threshold, version, votes, window := chain.Get_HF_info()
switch hf_state {
case 0: // voting in progress
locked := false
if window == 0 {
window = 1
}
if votes >= (threshold*100)/window {
locked = true
}
fmt.Printf("Hard-Fork v%d in-progress need %d/%d votes to lock in, votes: %d, LOCKED:%+v\n", version, ((threshold * 100) / window), window, votes, locked)
case 1: // daemon is old and needs updation
fmt.Printf("Please update this daemon to support Hard-Fork v%d\n", version)
case 2: // everything is okay
fmt.Printf("Hard-Fork v%d\n", version)
}
case strings.ToLower(line) == "bye":
fallthrough
case strings.ToLower(line) == "exit":
fallthrough
case strings.ToLower(line) == "quit":
close(Exit_In_Progress)
goto exit
case line == "sleep":
logger.Info("console sleeping for 1 second")
time.Sleep(1 * time.Second)
case line == "":
default:
logger.Info(fmt.Sprintf("you said: %s", strconv.Quote(line)))
}
}
exit:
logger.Info("Exit in Progress, Please wait")
time.Sleep(100 * time.Millisecond) // give prompt update time to finish
rpcserver.RPCServer_Stop()
p2p.P2P_Shutdown() // shutdown p2p subsystem
chain.Shutdown() // shutdown chain subsysem
stop_rpcs() // stop all wallets rpcs
for globals.Subsystem_Active > 0 {
logger.Info("Exit in Progress, Please wait.", "active subsystems", globals.Subsystem_Active)
time.Sleep(1000 * time.Millisecond)
}
}
func exists(path string) bool {
_, err := os.Stat(path)
return !errors.Is(err, os.ErrNotExist)
}
func trigger_block_creation() {
fmt.Printf("triggering fie creation\n")
if globals.Arguments["--noautomine"].(bool) == true {
err := os.WriteFile(TRIGGER_MINE_BLOCK, []byte("HELLO"), 0666)
fmt.Printf("triggering fie creation %s err %s\n", TRIGGER_MINE_BLOCK, err)
}
}
// generate a block as soon as tx appears in blockchain
// or 15 sec pass
func mine_block_auto(chain *blockchain.Blockchain, miner_address rpc.Address) {
last_block_time := time.Now()
for {
bl, _, _, _, err := chain.Create_new_block_template_mining(miner_address)
if err != nil {
logger.Error(err, "error while building mining block")
continue
}
if globals.Arguments["--noautomine"].(bool) == true && exists(TRIGGER_MINE_BLOCK) {
if err = Mine_block_single(chain, miner_address); err == nil {
last_block_time = time.Now()
os.Remove(TRIGGER_MINE_BLOCK)
} else {
logger.Error(err, "error while mining single block")
}
}
if globals.Arguments["--noautomine"].(bool) == false {
if time.Now().Sub(last_block_time) > time.Duration(config.BLOCK_TIME)*time.Second || // every X secs generate a block
len(bl.Tx_hashes) >= 1 { //pools have a tx, try to mine them ASAP
if err := Mine_block_single(chain, miner_address); err == nil {
last_block_time = time.Now()
}
}
}
time.Sleep(900 * time.Millisecond)
}
}
func prettyprint_json(b []byte) []byte {
var out bytes.Buffer
err := json.Indent(&out, b, "", " ")
_ = err
return out.Bytes()
}
func usage(w io.Writer) {
io.WriteString(w, "commands:\n")
//io.WriteString(w, completer.Tree(" "))
io.WriteString(w, "\t\033[1mhelp\033[0m\t\tthis help\n")
io.WriteString(w, "\t\033[1mdiff\033[0m\t\tShow difficulty\n")
io.WriteString(w, "\t\033[1mprint_bc\033[0m\tPrint blockchain info in a given blocks range, print_bc <begin_height> <end_height>\n")
io.WriteString(w, "\t\033[1mprint_block\033[0m\tPrint block, print_block <block_hash> or <block_height>\n")
io.WriteString(w, "\t\033[1mprint_height\033[0m\tPrint local blockchain height\n")
io.WriteString(w, "\t\033[1mprint_tx\033[0m\tPrint transaction, print_tx <transaction_hash>\n")
io.WriteString(w, "\t\033[1mstatus\033[0m\t\tShow general information\n")
io.WriteString(w, "\t\033[1mstart_mining\033[0m\tStart mining <dero address> <number of threads>\n")
io.WriteString(w, "\t\033[1mstop_mining\033[0m\tStop daemon mining\n")
io.WriteString(w, "\t\033[1mpeer_list\033[0m\tPrint peer list\n")
io.WriteString(w, "\t\033[1msync_info\033[0m\tPrint information about connected peers and their state\n")
io.WriteString(w, "\t\033[1mbye\033[0m\t\tQuit the daemon\n")
io.WriteString(w, "\t\033[1mban\033[0m\t\tBan specific ip from making any connections\n")
io.WriteString(w, "\t\033[1munban\033[0m\t\tRevoke restrictions on previously banned ips\n")
io.WriteString(w, "\t\033[1mbans\033[0m\t\tPrint current ban list\n")
io.WriteString(w, "\t\033[1mmempool_print\033[0m\t\tprint mempool contents\n")
io.WriteString(w, "\t\033[1mmempool_delete_tx\033[0m\t\tDelete specific tx from mempool\n")
io.WriteString(w, "\t\033[1mmempool_flush\033[0m\t\tFlush regpool\n")
io.WriteString(w, "\t\033[1mregpool_print\033[0m\t\tprint regpool contents\n")
io.WriteString(w, "\t\033[1mregpool_delete_tx\033[0m\t\tDelete specific tx from regpool\n")
io.WriteString(w, "\t\033[1mregpool_flush\033[0m\t\tFlush mempool\n")
io.WriteString(w, "\t\033[1mversion\033[0m\t\tShow version\n")
io.WriteString(w, "\t\033[1mexit\033[0m\t\tQuit the daemon\n")
io.WriteString(w, "\t\033[1mquit\033[0m\t\tQuit the daemon\n")
}
var completer = readline.NewPrefixCompleter(
readline.PcItem("help"),
readline.PcItem("diff"),
readline.PcItem("mempool_flush"),
readline.PcItem("mempool_delete_tx"),
readline.PcItem("mempool_print"),
readline.PcItem("regpool_flush"),
readline.PcItem("regpool_delete_tx"),
readline.PcItem("regpool_print"),
readline.PcItem("status"),
readline.PcItem("version"),
readline.PcItem("bye"),
readline.PcItem("exit"),
readline.PcItem("quit"),
)
func filterInput(r rune) (rune, bool) {
switch r {
// block CtrlZ feature
case readline.CharCtrlZ:
return r, false
}
return r, true
}
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