status-go/sign/errors.go

package sign

import (
	"errors"

	"github.com/ethereum/go-ethereum/accounts/keystore"
	"github.com/status-im/status-go/account"
)

var (
	//ErrSignReqNotFound - error sign request hash not found
	ErrSignReqNotFound = errors.New("sign request not found")
	//ErrSignReqInProgress - error sign request is in progress
	ErrSignReqInProgress = errors.New("sign request is in progress")
	//ErrSignReqTimedOut - error sign request sending timed out
	ErrSignReqTimedOut = errors.New("sign request sending timed out")
	//ErrSignReqDiscarded - error sign request discarded
	ErrSignReqDiscarded = errors.New("sign request has been discarded")
)

// TransientError means that the sign request won't be removed from the list of
// pending if it happens. There are a few built-in transient errors, and this
// struct can be used to wrap any error to be transient.
type TransientError struct {
	Reason error
}

// Error returns the string representation of the underlying error.
func (e TransientError) Error() string {
	return e.Reason.Error()
}

// NewTransientError wraps an error into a TransientError structure.
func NewTransientError(reason error) TransientError {
	return TransientError{reason}
}

// remove from queue on any error (except for transient ones) and propagate
// defined as map[string]bool because errors from ethclient returned wrapped as jsonError
var transientErrs = map[string]bool{
	keystore.ErrDecrypt.Error():          true, // wrong password
	account.ErrNoAccountSelected.Error(): true, // account not selected
}

func isTransient(err error) bool {
	_, ok := err.(TransientError)
	if ok {
		return true
	}
	_, transient := transientErrs[err.Error()]
	return transient
}