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les: implement new les fetcher (#20692)

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* cmd, consensus, eth, les: implement light fetcher

* les: address comment

* les: address comment

* les: address comments

* les: check td after delivery

* les: add linearExpiredValue for error counter

* les: fix import

* les: fix dead lock

* les: order announces by td

* les: encapsulate invalid counter

* les: address comment

* les: add more checks during the delivery

* les: fix log

* eth, les: fix lint

* eth/fetcher: address comment
This commit is contained in:
gary rong
2020-07-28 23:02:35 +08:00
committed by GitHub
parent 93da0cf8a1
commit 28c5a8a54b
22 changed files with 1366 additions and 1062 deletions
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30
consensus/consensus.go
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@ -27,9 +27,9 @@ import (
"github.com/ethereum/go-ethereum/rpc"
)
// ChainReader defines a small collection of methods needed to access the local
// blockchain during header and/or uncle verification.
type ChainReader interface {
// ChainHeaderReader defines a small collection of methods needed to access the local
// blockchain during header verification.
type ChainHeaderReader interface {
// Config retrieves the blockchain's chain configuration.
Config() *params.ChainConfig
@ -44,6 +44,12 @@ type ChainReader interface {
// GetHeaderByHash retrieves a block header from the database by its hash.
GetHeaderByHash(hash common.Hash) *types.Header
}
// ChainReader defines a small collection of methods needed to access the local
// blockchain during header and/or uncle verification.
type ChainReader interface {
ChainHeaderReader
// GetBlock retrieves a block from the database by hash and number.
GetBlock(hash common.Hash, number uint64) *types.Block
@ -59,13 +65,13 @@ type Engine interface {
// VerifyHeader checks whether a header conforms to the consensus rules of a
// given engine. Verifying the seal may be done optionally here, or explicitly
// via the VerifySeal method.
VerifyHeader(chain ChainReader, header *types.Header, seal bool) error
VerifyHeader(chain ChainHeaderReader, header *types.Header, seal bool) error
// VerifyHeaders is similar to VerifyHeader, but verifies a batch of headers
// concurrently. The method returns a quit channel to abort the operations and
// a results channel to retrieve the async verifications (the order is that of
// the input slice).
VerifyHeaders(chain ChainReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error)
VerifyHeaders(chain ChainHeaderReader, headers []*types.Header, seals []bool) (chan<- struct{}, <-chan error)
// VerifyUncles verifies that the given block's uncles conform to the consensus
// rules of a given engine.
@ -73,18 +79,18 @@ type Engine interface {
// VerifySeal checks whether the crypto seal on a header is valid according to
// the consensus rules of the given engine.
VerifySeal(chain ChainReader, header *types.Header) error
VerifySeal(chain ChainHeaderReader, header *types.Header) error
// Prepare initializes the consensus fields of a block header according to the
// rules of a particular engine. The changes are executed inline.
Prepare(chain ChainReader, header *types.Header) error
Prepare(chain ChainHeaderReader, header *types.Header) error
// Finalize runs any post-transaction state modifications (e.g. block rewards)
// but does not assemble the block.
//
// Note: The block header and state database might be updated to reflect any
// consensus rules that happen at finalization (e.g. block rewards).
Finalize(chain ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction,
Finalize(chain ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction,
uncles []*types.Header)
// FinalizeAndAssemble runs any post-transaction state modifications (e.g. block
@ -92,7 +98,7 @@ type Engine interface {
//
// Note: The block header and state database might be updated to reflect any
// consensus rules that happen at finalization (e.g. block rewards).
FinalizeAndAssemble(chain ChainReader, header *types.Header, state *state.StateDB, txs []*types.Transaction,
FinalizeAndAssemble(chain ChainHeaderReader, header *types.Header, state *state.StateDB, txs []*types.Transaction,
uncles []*types.Header, receipts []*types.Receipt) (*types.Block, error)
// Seal generates a new sealing request for the given input block and pushes
@ -100,17 +106,17 @@ type Engine interface {
//
// Note, the method returns immediately and will send the result async. More
// than one result may also be returned depending on the consensus algorithm.
Seal(chain ChainReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error
Seal(chain ChainHeaderReader, block *types.Block, results chan<- *types.Block, stop <-chan struct{}) error
// SealHash returns the hash of a block prior to it being sealed.
SealHash(header *types.Header) common.Hash
// CalcDifficulty is the difficulty adjustment algorithm. It returns the difficulty
// that a new block should have.
CalcDifficulty(chain ChainReader, time uint64, parent *types.Header) *big.Int
CalcDifficulty(chain ChainHeaderReader, time uint64, parent *types.Header) *big.Int
// APIs returns the RPC APIs this consensus engine provides.
APIs(chain ChainReader) []rpc.API
APIs(chain ChainHeaderReader) []rpc.API
// Close terminates any background threads maintained by the consensus engine.
Close() error