// 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") // ErrPrunedAncestor is returned when validating a block requires an ancestor // that is known, but the state of which is not available. ErrPrunedAncestor = errors.New("pruned 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 its parent's // plus one. ErrInvalidNumber = errors.New("invalid block number") )