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main.go
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main.go
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package main
import (
"bytes"
"context"
"encoding/hex"
"flag"
"fmt"
"io"
"os"
"strconv"
"time"
"chain/core/accesstoken"
"chain/core/config"
"chain/core/migrate"
"chain/core/mockhsm"
"chain/crypto/ed25519"
"chain/database/sql"
"chain/env"
"chain/log"
)
// config vars
var (
dbURL = env.String("DATABASE_URL", "postgres:///core?sslmode=disable")
)
// We collect log output in this buffer,
// and display it only when there's an error.
var logbuf bytes.Buffer
type command struct {
f func(*sql.DB, []string)
}
var commands = map[string]*command{
"config-generator": {configGenerator},
"create-block-keypair": {createBlockKeyPair},
"create-token": {createToken},
"config": {configNongenerator},
"reset": {reset},
}
func main() {
log.SetOutput(&logbuf)
env.Parse()
db, err := sql.Open("hapg", *dbURL)
if err != nil {
fmt.Fprintln(os.Stderr, "error:", err)
os.Exit(2)
}
if len(os.Args) < 2 {
help(os.Stdout)
os.Exit(0)
}
cmd := commands[os.Args[1]]
if cmd == nil {
fmt.Fprintln(os.Stderr, "unknown command:", os.Args[1])
help(os.Stderr)
os.Exit(1)
}
err = migrate.Run(db)
if err != nil {
fatalln("error: init schema", err)
}
cmd.f(db, os.Args[2:])
}
func configGenerator(db *sql.DB, args []string) {
const usage = "usage: corectl config-generator [-s] [-w duration] [quorum] [pubkey url]..."
var (
quorum int
signers []config.BlockSigner
err error
)
var flags flag.FlagSet
maxIssuanceWindow := flags.Duration("w", 24*time.Hour, "the maximum issuance window `duration` for this generator")
isSigner := flags.Bool("s", false, "whether this core is a signer")
flags.Usage = func() {
fmt.Println(usage)
flags.PrintDefaults()
os.Exit(1)
}
flags.Parse(args)
args = flags.Args()
if len(args) == 0 {
if *isSigner {
quorum = 1
}
} else if len(args)%2 != 1 {
fatalln(usage)
} else {
quorum, err = strconv.Atoi(args[0])
if err != nil {
fatalln(usage)
}
for i := 1; i < len(args); i += 2 {
pubkey, err := hex.DecodeString(args[i])
if err != nil {
fatalln(usage)
}
url := args[i+1]
signers = append(signers, config.BlockSigner{
// Silently truncate the input (which is likely to be an xpub
// produced by the create-block-keypair subcommand) to
// bare-pubkey size.
// TODO(bobg): When the mockhsm can produce bare pubkeys,
// treat xpubs on input as an error instead.
Pubkey: pubkey[:ed25519.PublicKeySize],
URL: url,
})
}
}
conf := &config.Config{
IsGenerator: true,
IsSigner: *isSigner,
Quorum: quorum,
Signers: signers,
MaxIssuanceWindow: *maxIssuanceWindow,
}
ctx := context.Background()
err = config.Configure(ctx, db, conf)
if err != nil {
fatalln("error:", err)
}
fmt.Println("blockchain id", conf.BlockchainID)
}
func createBlockKeyPair(db *sql.DB, args []string) {
if len(args) != 0 {
fatalln("error: create-block-keypair takes no args")
}
hsm := mockhsm.New(db)
ctx := context.Background()
pub, err := hsm.Create(ctx, "block_key")
if err != nil {
fatalln("error:", err)
}
fmt.Printf("%x\n", pub.Pub)
}
func createToken(db *sql.DB, args []string) {
const usage = "usage: corectl create-token [-net] [name]"
var flags flag.FlagSet
flagNet := flags.Bool("net", false, "create a network token instead of client")
flags.Usage = func() {
fmt.Println(usage)
flags.PrintDefaults()
os.Exit(1)
}
flags.Parse(args)
args = flags.Args()
if len(args) < 1 {
fatalln(usage)
}
accessTokens := &accesstoken.CredentialStore{DB: db}
typ := map[bool]string{true: "network", false: "client"}[*flagNet]
tok, err := accessTokens.Create(context.Background(), args[0], typ)
if err != nil {
fatalln("error:", err)
}
fmt.Println(tok.Token)
}
func configNongenerator(db *sql.DB, args []string) {
const usage = "usage: corectl config [-t token] [-k pubkey] [blockchain-id] [url]"
var flags flag.FlagSet
flagT := flags.String("t", "", "generator access `token`")
flagK := flags.String("k", "", "local `pubkey` for signing blocks")
flags.Usage = func() {
fmt.Println(usage)
flags.PrintDefaults()
os.Exit(1)
}
flags.Parse(args)
args = flags.Args()
if len(args) < 2 {
fatalln(usage)
}
var conf config.Config
err := conf.BlockchainID.UnmarshalText([]byte(args[0]))
if err != nil {
fatalln("error: invalid blockchain ID:", err)
}
conf.GeneratorURL = args[1]
conf.GeneratorAccessToken = *flagT
conf.IsSigner = *flagK != ""
conf.BlockPub = *flagK
ctx := context.Background()
err = config.Configure(ctx, db, &conf)
if err != nil {
fatalln("error:", err)
}
}
func fatalln(v ...interface{}) {
io.Copy(os.Stderr, &logbuf)
fmt.Fprintln(os.Stderr, v...)
os.Exit(2)
}
func help(w io.Writer) {
fmt.Fprintln(w, "usage: corectl [command] [arguments]")
fmt.Fprint(w, "\nThe commands are:\n\n")
for name := range commands {
fmt.Fprintln(w, "\t", name)
}
fmt.Fprintln(w)
}