path: root/consensus/errors.go

// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package consensus

import "errors"

var (
    // ErrUnknownAncestor is returned when validating a block requires an ancestor
    // that is unknown.
    ErrUnknownAncestor = errors.New("unknown ancestor")

    // ErrFutureBlock is returned when a block's timestamp is in the future according
    // to the current node.
    ErrFutureBlock = errors.New("block in the future")

    // ErrInvalidNumber is returned if a block's number doesn't equal it's parent's
    // plus one.
    ErrInvalidNumber = errors.New("invalid block number")
)