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92 lines
2.6 KiB
92 lines
2.6 KiB
package errors
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import (
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"fmt"
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"github.com/pkg/errors"
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)
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var (
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errValidatorsChanged = fmt.Errorf("Validators differ between header and certifier")
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errCommitNotFound = fmt.Errorf("Commit not found by provider")
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errTooMuchChange = fmt.Errorf("Validators change too much to safely update")
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errPastTime = fmt.Errorf("Update older than certifier height")
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errNoPathFound = fmt.Errorf("Cannot find a path of validators")
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)
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// IsCommitNotFoundErr checks whether an error is due to missing data
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func IsCommitNotFoundErr(err error) bool {
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return err != nil && (errors.Cause(err) == errCommitNotFound)
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}
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// ErrCommitNotFound indicates that a the requested commit was not found.
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func ErrCommitNotFound() error {
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return errors.WithStack(errCommitNotFound)
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}
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// IsValidatorsChangedErr checks whether an error is due
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// to a differing validator set.
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func IsValidatorsChangedErr(err error) bool {
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return err != nil && (errors.Cause(err) == errValidatorsChanged)
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}
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// ErrValidatorsChanged indicates that the validator set was changed between two commits.
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func ErrValidatorsChanged() error {
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return errors.WithStack(errValidatorsChanged)
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}
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// IsTooMuchChangeErr checks whether an error is due to too much change
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// between these validators sets.
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func IsTooMuchChangeErr(err error) bool {
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return err != nil && (errors.Cause(err) == errTooMuchChange)
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}
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// ErrTooMuchChange indicates that the underlying validator set was changed by >1/3.
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func ErrTooMuchChange() error {
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return errors.WithStack(errTooMuchChange)
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}
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// IsPastTimeErr ...
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func IsPastTimeErr(err error) bool {
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return err != nil && (errors.Cause(err) == errPastTime)
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}
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// ErrPastTime ...
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func ErrPastTime() error {
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return errors.WithStack(errPastTime)
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}
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// IsNoPathFoundErr checks whether an error is due to no path of
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// validators in provider from where we are to where we want to be
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func IsNoPathFoundErr(err error) bool {
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return err != nil && (errors.Cause(err) == errNoPathFound)
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}
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// ErrNoPathFound ...
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func ErrNoPathFound() error {
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return errors.WithStack(errNoPathFound)
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}
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//--------------------------------------------
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type errHeightMismatch struct {
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h1, h2 int
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}
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func (e errHeightMismatch) Error() string {
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return fmt.Sprintf("Blocks don't match - %d vs %d", e.h1, e.h2)
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}
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// IsHeightMismatchErr checks whether an error is due to data from different blocks
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func IsHeightMismatchErr(err error) bool {
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if err == nil {
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return false
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}
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_, ok := errors.Cause(err).(errHeightMismatch)
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return ok
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}
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// ErrHeightMismatch returns an mismatch error with stack-trace
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func ErrHeightMismatch(h1, h2 int) error {
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return errors.WithStack(errHeightMismatch{h1, h2})
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}
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