78 lines
1.6 KiB
Go
78 lines
1.6 KiB
Go
package main
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import (
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"crypto/rand"
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"encoding/hex"
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"flag"
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"fmt"
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log "github.com/sirupsen/logrus"
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qrcode "github.com/skip2/go-qrcode"
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"os"
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)
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func random_hex() string {
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b := make([]byte, 16)
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_, err := rand.Read(b)
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if err != nil {
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log.Warn(err.Error())
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return ""
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}
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return hex.EncodeToString(b)
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}
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func main() {
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help_flag_ptr := flag.Bool("help", false, "show the command line options")
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tx_max_ptr := flag.Int("tx_max", 0, "set the maximum satoshis per transaction")
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day_max_ptr := flag.Int("day_max", 0, "set the maximum satoshis per day (24 hours)")
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enable_flag_ptr := flag.Bool("enable", false, "enable the card for payments")
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card_name_ptr := flag.String("name", "", "set a name for the card")
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flag.Parse()
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// handle -help
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if *help_flag_ptr == true {
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flag.PrintDefaults()
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return
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}
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fmt.Println()
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fmt.Println("use './createboltcard -help' to show command line options")
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// create the keys
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one_time_code := random_hex()
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k0_auth_key := random_hex()
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k2_cmac_key := random_hex()
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k3 := random_hex()
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k4 := random_hex()
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// create the new card record
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err := db_insert_card(one_time_code, k0_auth_key, k2_cmac_key, k3, k4,
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*tx_max_ptr, *day_max_ptr, *enable_flag_ptr, *card_name_ptr)
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if err != nil {
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log.Warn(err.Error())
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return
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}
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// remove any expired records
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err = db_delete_expired()
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if err != nil {
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log.Warn(err.Error())
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return
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}
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// show a QR code on the console for the URI + one_time_code
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hostdomain := os.Getenv("HOST_DOMAIN")
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url := "https://" + hostdomain + "/new?a=" + one_time_code
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fmt.Println()
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fmt.Println(url)
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fmt.Println()
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q, err := qrcode.New(url, qrcode.Medium)
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fmt.Println(q.ToSmallString(false))
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}
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