diff options
Diffstat (limited to 'consensus')
| -rw-r--r-- | consensus/errors.go | 41 | ||||
| -rw-r--r-- | consensus/ethash/consensus.go | 37 |
2 files changed, 57 insertions, 21 deletions
diff --git a/consensus/errors.go b/consensus/errors.go new file mode 100644 index 000000000..f94bcb329 --- /dev/null +++ b/consensus/errors.go @@ -0,0 +1,41 @@ +// 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") + + // ErrLargeBlockTime is returned if the value of the timestamp is beyond + // any reasonable value. + ErrLargeBlockTime = errors.New("timestamp too big") + + // ErrZeroBlockTime is returned if the block's timestamp is the same as the one + // its parent has. + ErrZeroBlockTime = errors.New("timestamp equals parent's") + + // 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") +) diff --git a/consensus/ethash/consensus.go b/consensus/ethash/consensus.go index 603be3e53..4a3a74a93 100644 --- a/consensus/ethash/consensus.go +++ b/consensus/ethash/consensus.go @@ -42,20 +42,15 @@ var ( ) var ( - ErrInvalidChain = errors.New("invalid header chain") - ErrParentUnknown = errors.New("parent not known locally") - ErrFutureBlock = errors.New("block in the future") - ErrLargeBlockTimestamp = errors.New("timestamp too big") - ErrZeroBlockTime = errors.New("timestamp equals parent's") - ErrInvalidNumber = errors.New("invalid block number") - ErrTooManyUncles = errors.New("too many uncles") - ErrDuplicateUncle = errors.New("duplicate uncle") - ErrUncleIsAncestor = errors.New("uncle is ancestor") - ErrDanglingUncle = errors.New("uncle's parent is not ancestor") - ErrNonceOutOfRange = errors.New("nonce out of range") - ErrInvalidDifficulty = errors.New("non-positive difficulty") - ErrInvalidMixDigest = errors.New("invalid mix digest") - ErrInvalidPoW = errors.New("invalid proof-of-work") + ErrInvalidChain = errors.New("invalid header chain") + ErrTooManyUncles = errors.New("too many uncles") + ErrDuplicateUncle = errors.New("duplicate uncle") + ErrUncleIsAncestor = errors.New("uncle is ancestor") + ErrDanglingUncle = errors.New("uncle's parent is not ancestor") + ErrNonceOutOfRange = errors.New("nonce out of range") + ErrInvalidDifficulty = errors.New("non-positive difficulty") + ErrInvalidMixDigest = errors.New("invalid mix digest") + ErrInvalidPoW = errors.New("invalid proof-of-work") ) // VerifyHeader checks whether a header conforms to the consensus rules of the @@ -72,7 +67,7 @@ func (ethash *Ethash) VerifyHeader(chain consensus.ChainReader, header *types.He } parent := chain.GetHeader(header.ParentHash, number-1) if parent == nil { - return ErrParentUnknown + return consensus.ErrUnknownAncestor } // Sanity checks passed, do a proper verification return ethash.verifyHeader(chain, header, parent, false, seal) @@ -125,7 +120,7 @@ func (ethash *Ethash) VerifyHeaders(chain consensus.ChainReader, headers []*type case chain.GetHeader(headers[index].Hash(), headers[index].Number.Uint64()-1) != nil: outputs <- result{index: index, err: nil} case parent == nil: - failure = ErrParentUnknown + failure = consensus.ErrUnknownAncestor outputs <- result{index: index, err: failure} default: failure = ethash.verifyHeader(chain, headers[index], parent, false, seals[index]) @@ -254,15 +249,15 @@ func (ethash *Ethash) verifyHeader(chain consensus.ChainReader, header, parent * // Verify the header's timestamp if uncle { if header.Time.Cmp(math.MaxBig256) > 0 { - return ErrLargeBlockTimestamp + return consensus.ErrLargeBlockTime } } else { if header.Time.Cmp(big.NewInt(time.Now().Unix())) > 0 { - return ErrFutureBlock + return consensus.ErrFutureBlock } } if header.Time.Cmp(parent.Time) <= 0 { - return ErrZeroBlockTime + return consensus.ErrZeroBlockTime } // Verify the block's difficulty based in it's timestamp and parent's difficulty expected := CalcDifficulty(chain.Config(), header.Time.Uint64(), parent.Time.Uint64(), parent.Number, parent.Difficulty) @@ -282,7 +277,7 @@ func (ethash *Ethash) verifyHeader(chain consensus.ChainReader, header, parent * } // Verify that the block number is parent's +1 if diff := new(big.Int).Sub(header.Number, parent.Number); diff.Cmp(big.NewInt(1)) != 0 { - return ErrInvalidNumber + return consensus.ErrInvalidNumber } // Verify the engine specific seal securing the block if seal { @@ -449,7 +444,7 @@ func (ethash *Ethash) VerifySeal(chain consensus.ChainReader, header *types.Head func (ethash *Ethash) Prepare(chain consensus.ChainReader, header *types.Header) error { parent := chain.GetHeader(header.ParentHash, header.Number.Uint64()-1) if parent == nil { - return ErrParentUnknown + return consensus.ErrUnknownAncestor } header.Difficulty = CalcDifficulty(chain.Config(), header.Time.Uint64(), parent.Time.Uint64(), parent.Number, parent.Difficulty) |