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113 lines
2.9 KiB
113 lines
2.9 KiB
package light
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import (
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"fmt"
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"time"
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"github.com/tendermint/tendermint/light/provider"
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"github.com/tendermint/tendermint/types"
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)
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// ErrOldHeaderExpired means the old (trusted) header has expired according to
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// the given trustingPeriod and current time. If so, the light client must be
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// reset subjectively.
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type ErrOldHeaderExpired struct {
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At time.Time
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Now time.Time
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}
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func (e ErrOldHeaderExpired) Error() string {
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return fmt.Sprintf("old header has expired at %v (now: %v)", e.At, e.Now)
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}
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// ErrNewValSetCantBeTrusted means the new validator set cannot be trusted
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// because < 1/3rd (+trustLevel+) of the old validator set has signed.
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type ErrNewValSetCantBeTrusted struct {
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Reason types.ErrNotEnoughVotingPowerSigned
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}
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func (e ErrNewValSetCantBeTrusted) Error() string {
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return fmt.Sprintf("cant trust new val set: %v", e.Reason)
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}
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// ErrInvalidHeader means the header either failed the basic validation or
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// commit is not signed by 2/3+.
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type ErrInvalidHeader struct {
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Reason error
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}
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func (e ErrInvalidHeader) Error() string {
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return fmt.Sprintf("invalid header: %v", e.Reason)
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}
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// ErrConflictingHeaders is thrown when two conflicting headers are discovered.
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type ErrConflictingHeaders struct {
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H1 *types.SignedHeader
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Primary provider.Provider
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H2 *types.SignedHeader
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Witness provider.Provider
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}
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func (e ErrConflictingHeaders) Error() string {
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return fmt.Sprintf(
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"header hash %X from primary %v does not match one %X from witness %v",
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e.H1.Hash(), e.Primary,
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e.H2.Hash(), e.Witness)
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}
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// ErrVerificationFailed means either sequential or skipping verification has
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// failed to verify from header #1 to header #2 due to some reason.
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type ErrVerificationFailed struct {
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From int64
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To int64
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Reason error
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}
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// Unwrap returns underlying reason.
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func (e ErrVerificationFailed) Unwrap() error {
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return e.Reason
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}
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func (e ErrVerificationFailed) Error() string {
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return fmt.Sprintf(
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"verify from #%d to #%d failed: %v",
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e.From, e.To, e.Reason)
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}
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// errNoWitnesses means that there are not enough witnesses connected to
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// continue running the light client.
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type errNoWitnesses struct{}
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func (e errNoWitnesses) Error() string {
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return "no witnesses connected. please reset light client"
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}
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type badWitnessCode int
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const (
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noResponse badWitnessCode = iota + 1
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invalidHeader
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invalidValidatorSet
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)
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// errBadWitness is returned when the witness either does not respond or
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// responds with an invalid header.
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type errBadWitness struct {
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Reason error
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Code badWitnessCode
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WitnessIndex int
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}
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func (e errBadWitness) Error() string {
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switch e.Code {
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case noResponse:
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return fmt.Sprintf("failed to get a header/vals from witness: %v", e.Reason)
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case invalidHeader:
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return fmt.Sprintf("witness sent us invalid header: %v", e.Reason)
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case invalidValidatorSet:
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return fmt.Sprintf("witness sent us invalid validator set: %v", e.Reason)
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default:
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return fmt.Sprintf("unknown code: %d", e.Code)
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}
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}
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