Rongjian Lan
6 years ago
parent
f5e26cf624
commit
e7e7772858
@ -1,118 +0,0 @@ |
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package consensus |
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import ( |
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"github.com/ethereum/go-ethereum/common" |
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"github.com/ethereum/go-ethereum/crypto/sha3" |
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"github.com/ethereum/go-ethereum/params" |
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"github.com/ethereum/go-ethereum/rlp" |
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"github.com/harmony-one/harmony/core/state" |
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"github.com/harmony-one/harmony/core/types" |
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) |
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type Bft struct { |
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} |
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func NewFaker() *Bft { |
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return &Bft{} |
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} |
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// Author implements Engine, returning the header's coinbase as the
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// proof-of-work verified author of the block.
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func (bft *Bft) Author(header *types.Header) (common.Address, error) { |
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return header.Coinbase, nil |
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} |
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// VerifyHeader checks whether a header conforms to the consensus rules of the
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// stock Ethereum bft engine.
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func (bft *Bft) VerifyHeader(chain ChainReader, header *types.Header, seal bool) error { |
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return nil |
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} |
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// VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers
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// concurrently. The method returns a quit channel to abort the operations and
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// a results channel to retrieve the async verifications.
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func (bft *Bft) VerifyHeaders(chain ChainReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error) { |
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abort, results := make(chan struct{}), make(chan error, len(headers)) |
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for i := 0; i < len(headers); i++ { |
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results <- nil |
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} |
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return abort, results |
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} |
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func (bft *Bft) verifyHeaderWorker(chain ChainReader, headers []*types.Header, seals []bool, index int) error { |
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var parent *types.Header |
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if index == 0 { |
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parent = chain.GetHeader(headers[0].ParentHash, headers[0].Number.Uint64()-1) |
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} else if headers[index-1].Hash() == headers[index].ParentHash { |
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parent = headers[index-1] |
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} |
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if parent == nil { |
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return ErrUnknownAncestor |
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} |
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if chain.GetHeader(headers[index].Hash(), headers[index].Number.Uint64()) != nil { |
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return nil // known block
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} |
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return bft.verifyHeader(chain, headers[index], parent, false, seals[index]) |
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} |
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// verifyHeader checks whether a header conforms to the consensus rules of the
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// stock Ethereum bft engine.
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// See YP section 4.3.4. "Block Header Validity"
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func (bft *Bft) verifyHeader(chain ChainReader, header, parent *types.Header, uncle bool, seal bool) error { |
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return nil |
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} |
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// VerifySeal implements consensus.Engine, checking whether the given block satisfies
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// the PoW difficulty requirements.
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func (bft *Bft) VerifySeal(chain ChainReader, header *types.Header) error { |
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return nil |
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} |
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// Prepare implements consensus.Engine, initializing the difficulty field of a
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// header to conform to the ethash protocol. The changes are done inline.
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func (bft *Bft) Prepare(chain ChainReader, header *types.Header) error { |
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return nil |
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} |
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// Finalize implements consensus.Engine, accumulating the block and uncle rewards,
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// setting the final state and assembling the block.
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func (bft *Bft) Finalize(chain ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction, receipts []*types.Receipt) (*types.Block, error) { |
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// Accumulate any block and uncle rewards and commit the final state root
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// Header seems complete, assemble into a block and return
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accumulateRewards(chain.Config(), state, header) |
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header.Root = state.IntermediateRoot(false) |
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return types.NewBlock(header, txs, receipts), nil |
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} |
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// SealHash returns the hash of a block prior to it being sealed.
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func (bft *Bft) SealHash(header *types.Header) (hash common.Hash) { |
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hasher := sha3.NewKeccak256() |
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rlp.Encode(hasher, []interface{}{ |
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header.ParentHash, |
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header.Coinbase, |
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header.Root, |
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header.TxHash, |
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header.ReceiptHash, |
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header.Bloom, |
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header.Difficulty, |
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header.Number, |
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header.GasLimit, |
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header.GasUsed, |
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header.Time, |
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header.Extra, |
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}) |
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hasher.Sum(hash[:0]) |
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return hash |
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} |
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func (bft *Bft) Seal(chain ChainReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error { |
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return nil |
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} |
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// AccumulateRewards credits the coinbase of the given block with the mining
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// reward. The total reward consists of the static block reward and rewards for
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// included uncles. The coinbase of each uncle block is also rewarded.
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func accumulateRewards(config *params.ChainConfig, state *state.StateDB, header *types.Header) { |
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} |
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