76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
package input
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"syscall"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
|
|
"github.com/nspcc-dev/neo-go/pkg/encoding/fixedn"
|
|
"golang.org/x/term"
|
|
)
|
|
|
|
// Terminal is a terminal used for input. If `nil`, stdin is used.
|
|
var Terminal *term.Terminal
|
|
|
|
// ReadWriter combiner reader and writer.
|
|
type ReadWriter struct {
|
|
io.Reader
|
|
io.Writer
|
|
}
|
|
|
|
// ReadLine reads line from the input without trailing '\n'.
|
|
func ReadLine(prompt string) (string, error) {
|
|
trm := Terminal
|
|
if trm == nil {
|
|
s, err := term.MakeRaw(syscall.Stdin)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer func() { _ = term.Restore(syscall.Stdin, s) }()
|
|
trm = term.NewTerminal(ReadWriter{
|
|
Reader: os.Stdin,
|
|
Writer: os.Stdout,
|
|
}, "")
|
|
}
|
|
return readLine(trm, prompt)
|
|
}
|
|
|
|
func readLine(trm *term.Terminal, prompt string) (string, error) {
|
|
_, err := trm.Write([]byte(prompt))
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return trm.ReadLine()
|
|
}
|
|
|
|
// ReadPassword reads user password with prompt.
|
|
func ReadPassword(prompt string) (string, error) {
|
|
trm := Terminal
|
|
if trm == nil {
|
|
s, err := term.MakeRaw(syscall.Stdin)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
defer func() { _ = term.Restore(syscall.Stdin, s) }()
|
|
trm = term.NewTerminal(ReadWriter{os.Stdin, os.Stdout}, prompt)
|
|
}
|
|
return trm.ReadPassword(prompt)
|
|
}
|
|
|
|
// ConfirmTx asks for a confirmation to send tx.
|
|
func ConfirmTx(w io.Writer, tx *transaction.Transaction) error {
|
|
fmt.Fprintf(w, "Network fee: %s\n", fixedn.Fixed8(tx.NetworkFee))
|
|
fmt.Fprintf(w, "System fee: %s\n", fixedn.Fixed8(tx.SystemFee))
|
|
fmt.Fprintf(w, "Total fee: %s\n", fixedn.Fixed8(tx.NetworkFee+tx.SystemFee))
|
|
ln, err := ReadLine("Relay transaction (y|N)> ")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if 0 < len(ln) && ln[0] == 'y' || ln[0] == 'Y' {
|
|
return nil
|
|
}
|
|
return errors.New("cancelled")
|
|
}
|