errors.gno

 1package users
 2
 3import (
 4	"errors"
 5)
 6
 7const prefix = "r/sys/users: "
 8
 9var (
10	ErrAlreadyWhitelisted    = errors.New(prefix + "already whitelisted")
11	ErrWhitelistRemoveFailed = errors.New(prefix + "failed to remove address from whitelist")
12
13	ErrNameTaken          = errors.New(prefix + "name/Alias already taken")
14	ErrCanonicalCollision = errors.New(prefix + "name collides with a confusable variant of an existing name")
15	ErrInvalidAddress     = errors.New(prefix + "invalid address")
16
17	ErrEmptyUsername   = errors.New(prefix + "empty username provided")
18	ErrNameLikeAddress = errors.New(prefix + "username resembles a gno.land address")
19	ErrInvalidUsername = errors.New(prefix + "username must match ^[a-z][a-z0-9]*([_-][a-z0-9]+)*$ (max 64 chars)")
20
21	ErrAlreadyHasName = errors.New(prefix + "username for this address already registered - try creating an Alias")
22	ErrDeletedUser    = errors.New(prefix + "cannot register a new username after deleting")
23
24	ErrUserNotExistOrDeleted = errors.New(prefix + "this user does not exist or was deleted")
25
26	// ErrInvalidRealm is returned by controller-gated *UserData mutators
27	// when the supplied rlm is not the caller's live cur (i.e.
28	// rlm.IsCurrent() is false). Closes Class-2 designation forgery via
29	// a stored stale realm value whose .Address() resolves to a
30	// whitelisted controller. See docs/resources/gno-security.md.
31	ErrInvalidRealm = errors.New(prefix + "rlm is not the caller's live cur")
32)
33
34// ErrNotWhitelisted stores the failing caller's realm identity as a
35// plain string so the error is a pure data record (no live realm values
36// in its fields).
37type ErrNotWhitelisted struct {
38	Caller string // "CodeRealm{ <addr>, <pkgPath> }" or "UserRealm{ <addr> }" — failed the whitelist check
39}
40
41// NewErrNotWhitelisted constructs the error with the caller's realm
42// identity captured as a string at construction time. The _ int
43// discriminator keeps this non-crossing (a non-crossing function can't
44// take a `realm`-named-`cur` first param, so we use the standard
45// _ int, rlm realm shape).
46func NewErrNotWhitelisted(_ int, caller realm) ErrNotWhitelisted {
47	return ErrNotWhitelisted{
48		Caller: caller.String(),
49	}
50}
51
52func (e ErrNotWhitelisted) Error() string {
53	return prefix + "caller realm/user does not exist in whitelist: " + e.Caller
54}