errors.go 2.5 KB

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  1. // Copyright 2017 The go-ethereum Authors
  2. // This file is part of the go-ethereum library.
  3. //
  4. // The go-ethereum library is free software: you can redistribute it and/or modify
  5. // it under the terms of the GNU Lesser General Public License as published by
  6. // the Free Software Foundation, either version 3 of the License, or
  7. // (at your option) any later version.
  8. //
  9. // The go-ethereum library is distributed in the hope that it will be useful,
  10. // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12. // GNU Lesser General Public License for more details.
  13. //
  14. // You should have received a copy of the GNU Lesser General Public License
  15. // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
  16. package accounts
  17. import (
  18. "errors"
  19. "fmt"
  20. )
  21. // ErrUnknownAccount is returned for any requested operation for which no backend
  22. // provides the specified account.
  23. var ErrUnknownAccount = errors.New("unknown account")
  24. // ErrUnknownWallet is returned for any requested operation for which no backend
  25. // provides the specified wallet.
  26. var ErrUnknownWallet = errors.New("unknown wallet")
  27. // ErrNotSupported is returned when an operation is requested from an account
  28. // backend that it does not support.
  29. var ErrNotSupported = errors.New("not supported")
  30. // ErrInvalidPassphrase is returned when a decryption operation receives a bad
  31. // passphrase.
  32. var ErrInvalidPassphrase = errors.New("invalid passphrase")
  33. // ErrWalletAlreadyOpen is returned if a wallet is attempted to be opened the
  34. // second time.
  35. var ErrWalletAlreadyOpen = errors.New("wallet already open")
  36. // ErrWalletClosed is returned if a wallet is attempted to be opened the
  37. // secodn time.
  38. var ErrWalletClosed = errors.New("wallet closed")
  39. // AuthNeededError is returned by backends for signing requests where the user
  40. // is required to provide further authentication before signing can succeed.
  41. //
  42. // This usually means either that a password needs to be supplied, or perhaps a
  43. // one time PIN code displayed by some hardware device.
  44. type AuthNeededError struct {
  45. Needed string // Extra authentication the user needs to provide
  46. }
  47. // NewAuthNeededError creates a new authentication error with the extra details
  48. // about the needed fields set.
  49. func NewAuthNeededError(needed string) error {
  50. return &AuthNeededError{
  51. Needed: needed,
  52. }
  53. }
  54. // Error implements the standard error interface.
  55. func (err *AuthNeededError) Error() string {
  56. return fmt.Sprintf("authentication needed: %s", err.Needed)
  57. }