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core, consensus: pluggable consensus engines (#3817)

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This commit adds pluggable consensus engines to go-ethereum. In short, it
introduces a generic consensus interface, and refactors the entire codebase to
use this interface.
This commit is contained in:
Péter Szilágyi
2017-04-05 01:16:29 +03:00
committed by Felix Lange
parent e50a5b7771
commit 09777952ee
61 changed files with 1681 additions and 1426 deletions
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12
eth/fetcher/fetcher.go
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@ -52,8 +52,8 @@ type headerRequesterFn func(common.Hash) error
// bodyRequesterFn is a callback type for sending a body retrieval request.
type bodyRequesterFn func([]common.Hash) error
// blockValidatorFn is a callback type to verify a block's header for fast propagation.
type blockValidatorFn func(block *types.Block, parent *types.Block) error
// headerVerifierFn is a callback type to verify a block's header for fast propagation.
type headerVerifierFn func(header *types.Header) error
// blockBroadcasterFn is a callback type for broadcasting a block to connected peers.
type blockBroadcasterFn func(block *types.Block, propagate bool)
@ -129,7 +129,7 @@ type Fetcher struct {
// Callbacks
getBlock blockRetrievalFn // Retrieves a block from the local chain
validateBlock blockValidatorFn // Checks if a block's headers have a valid proof of work
verifyHeader headerVerifierFn // Checks if a block's headers have a valid proof of work
broadcastBlock blockBroadcasterFn // Broadcasts a block to connected peers
chainHeight chainHeightFn // Retrieves the current chain's height
insertChain chainInsertFn // Injects a batch of blocks into the chain
@ -144,7 +144,7 @@ type Fetcher struct {
}
// New creates a block fetcher to retrieve blocks based on hash announcements.
func New(getBlock blockRetrievalFn, validateBlock blockValidatorFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *Fetcher {
func New(getBlock blockRetrievalFn, verifyHeader headerVerifierFn, broadcastBlock blockBroadcasterFn, chainHeight chainHeightFn, insertChain chainInsertFn, dropPeer peerDropFn) *Fetcher {
return &Fetcher{
notify: make(chan *announce),
inject: make(chan *inject),
@ -162,7 +162,7 @@ func New(getBlock blockRetrievalFn, validateBlock blockValidatorFn, broadcastBlo
queues: make(map[string]int),
queued: make(map[common.Hash]*inject),
getBlock: getBlock,
validateBlock: validateBlock,
verifyHeader: verifyHeader,
broadcastBlock: broadcastBlock,
chainHeight: chainHeight,
insertChain: insertChain,
@ -648,7 +648,7 @@ func (f *Fetcher) insert(peer string, block *types.Block) {
return
}
// Quickly validate the header and propagate the block if it passes
switch err := f.validateBlock(block, parent); err {
switch err := f.verifyHeader(block.Header()); err {
case nil:
// All ok, quickly propagate to our peers
propBroadcastOutTimer.UpdateSince(block.ReceivedAt)