From 055095798911e3c6f2e210220cb7ece1b71f6517 Mon Sep 17 00:00:00 2001
From: Nick Johnson <arachnid@notdot.net>
Date: Tue, 27 Jun 2017 16:15:29 +0100
Subject: [PATCH] eth, les, light: Refactor downloader to use blockchain
interface
---
eth/downloader/downloader.go | 143 +++++++++++++++++-------------
eth/downloader/downloader_test.go | 72 ++++++++-------
eth/downloader/types.go | 41 ---------
eth/handler.go | 5 +-
les/handler.go | 4 +-
light/lightchain.go | 15 ++++
6 files changed, 134 insertions(+), 146 deletions(-)
diff --git a/eth/downloader/downloader.go b/eth/downloader/downloader.go
index e4d1392d0..a5d03d17e 100644
--- a/eth/downloader/downloader.go
+++ b/eth/downloader/downloader.go
@@ -114,21 +114,11 @@ type Downloader struct {
syncStatsState stateSyncStats
syncStatsLock sync.RWMutex // Lock protecting the sync stats fields
+ lightchain LightChain
+ chain BlockChain
+
// Callbacks
- hasHeader headerCheckFn // Checks if a header is present in the chain
- hasBlockAndState blockAndStateCheckFn // Checks if a block and associated state is present in the chain
- getHeader headerRetrievalFn // Retrieves a header from the chain
- getBlock blockRetrievalFn // Retrieves a block from the chain
- headHeader headHeaderRetrievalFn // Retrieves the head header from the chain
- headBlock headBlockRetrievalFn // Retrieves the head block from the chain
- headFastBlock headFastBlockRetrievalFn // Retrieves the head fast-sync block from the chain
- commitHeadBlock headBlockCommitterFn // Commits a manually assembled block as the chain head
- getTd tdRetrievalFn // Retrieves the TD of a block from the chain
- insertHeaders headerChainInsertFn // Injects a batch of headers into the chain
- insertBlocks blockChainInsertFn // Injects a batch of blocks into the chain
- insertReceipts receiptChainInsertFn // Injects a batch of blocks and their receipts into the chain
- rollback chainRollbackFn // Removes a batch of recently added chain links
- dropPeer peerDropFn // Drops a peer for misbehaving
+ dropPeer peerDropFn // Drops a peer for misbehaving
// Status
synchroniseMock func(id string, hash common.Hash) error // Replacement for synchronise during testing
@@ -163,11 +153,56 @@ type Downloader struct {
chainInsertHook func([]*fetchResult) // Method to call upon inserting a chain of blocks (possibly in multiple invocations)
}
+type LightChain interface {
+ // HasHeader verifies a header's presence in the local chain.
+ HasHeader(common.Hash) bool
+
+ // GetHeaderByHash retrieves a header from the local chain.
+ GetHeaderByHash(common.Hash) *types.Header
+
+ // CurrentHeader retrieves the head header from the local chain.
+ CurrentHeader() *types.Header
+
+ // GetTdByHash returns the total difficulty of a local block.
+ GetTdByHash(common.Hash) *big.Int
+
+ // InsertHeaderChain inserts a batch of headers into the local chain.
+ InsertHeaderChain([]*types.Header, int) (int, error)
+
+ // Rollback removes a few recently added elements from the local chain.
+ Rollback([]common.Hash)
+}
+
+type BlockChain interface {
+ LightChain
+
+ // HasBlockAndState verifies block and associated states' presence in the local chain.
+ HasBlockAndState(common.Hash) bool
+
+ // GetBlockByHash retrieves a block from the local chain.
+ GetBlockByHash(common.Hash) *types.Block
+
+ // CurrentBlock retrieves the head block from the local chain.
+ CurrentBlock() *types.Block
+
+ // CurrentFastBlock retrieves the head fast block from the local chain.
+ CurrentFastBlock() *types.Block
+
+ // FastSyncCommitHead directly commits the head block to a certain entity.
+ FastSyncCommitHead(common.Hash) error
+
+ // InsertChain inserts a batch of blocks into the local chain.
+ InsertChain(types.Blocks) (int, error)
+
+ // InsertReceiptChain inserts a batch of receipts into the local chain.
+ InsertReceiptChain(types.Blocks, []types.Receipts) (int, error)
+}
+
// New creates a new downloader to fetch hashes and blocks from remote peers.
-func New(mode SyncMode, stateDb ethdb.Database, mux *event.TypeMux, hasHeader headerCheckFn, hasBlockAndState blockAndStateCheckFn,
- getHeader headerRetrievalFn, getBlock blockRetrievalFn, headHeader headHeaderRetrievalFn, headBlock headBlockRetrievalFn,
- headFastBlock headFastBlockRetrievalFn, commitHeadBlock headBlockCommitterFn, getTd tdRetrievalFn, insertHeaders headerChainInsertFn,
- insertBlocks blockChainInsertFn, insertReceipts receiptChainInsertFn, rollback chainRollbackFn, dropPeer peerDropFn) *Downloader {
+func New(mode SyncMode, stateDb ethdb.Database, mux *event.TypeMux, chain BlockChain, lightchain LightChain, dropPeer peerDropFn) *Downloader {
+ if lightchain == nil {
+ lightchain = chain
+ }
dl := &Downloader{
mode: mode,
@@ -177,19 +212,8 @@ func New(mode SyncMode, stateDb ethdb.Database, mux *event.TypeMux, hasHeader he
stateDB: stateDb,
rttEstimate: uint64(rttMaxEstimate),
rttConfidence: uint64(1000000),
- hasHeader: hasHeader,
- hasBlockAndState: hasBlockAndState,
- getHeader: getHeader,
- getBlock: getBlock,
- headHeader: headHeader,
- headBlock: headBlock,
- headFastBlock: headFastBlock,
- commitHeadBlock: commitHeadBlock,
- getTd: getTd,
- insertHeaders: insertHeaders,
- insertBlocks: insertBlocks,
- insertReceipts: insertReceipts,
- rollback: rollback,
+ chain: chain,
+ lightchain: lightchain,
dropPeer: dropPeer,
headerCh: make(chan dataPack, 1),
bodyCh: make(chan dataPack, 1),
@@ -223,11 +247,11 @@ func (d *Downloader) Progress() ethereum.SyncProgress {
current := uint64(0)
switch d.mode {
case FullSync:
- current = d.headBlock().NumberU64()
+ current = d.chain.CurrentBlock().NumberU64()
case FastSync:
- current = d.headFastBlock().NumberU64()
+ current = d.chain.CurrentFastBlock().NumberU64()
case LightSync:
- current = d.headHeader().Number.Uint64()
+ current = d.lightchain.CurrentHeader().Number.Uint64()
}
return ethereum.SyncProgress{
StartingBlock: d.syncStatsChainOrigin,
@@ -572,13 +596,13 @@ func (d *Downloader) fetchHeight(p *peer) (*types.Header, error) {
// the head links match), we do a binary search to find the common ancestor.
func (d *Downloader) findAncestor(p *peer, height uint64) (uint64, error) {
// Figure out the valid ancestor range to prevent rewrite attacks
- floor, ceil := int64(-1), d.headHeader().Number.Uint64()
+ floor, ceil := int64(-1), d.lightchain.CurrentHeader().Number.Uint64()
p.log.Debug("Looking for common ancestor", "local", ceil, "remote", height)
if d.mode == FullSync {
- ceil = d.headBlock().NumberU64()
+ ceil = d.chain.CurrentBlock().NumberU64()
} else if d.mode == FastSync {
- ceil = d.headFastBlock().NumberU64()
+ ceil = d.chain.CurrentFastBlock().NumberU64()
}
if ceil >= MaxForkAncestry {
floor = int64(ceil - MaxForkAncestry)
@@ -638,7 +662,7 @@ func (d *Downloader) findAncestor(p *peer, height uint64) (uint64, error) {
continue
}
// Otherwise check if we already know the header or not
- if (d.mode == FullSync && d.hasBlockAndState(headers[i].Hash())) || (d.mode != FullSync && d.hasHeader(headers[i].Hash())) {
+ if (d.mode == FullSync && d.chain.HasBlockAndState(headers[i].Hash())) || (d.mode != FullSync && d.lightchain.HasHeader(headers[i].Hash())) {
number, hash = headers[i].Number.Uint64(), headers[i].Hash()
// If every header is known, even future ones, the peer straight out lied about its head
@@ -703,11 +727,11 @@ func (d *Downloader) findAncestor(p *peer, height uint64) (uint64, error) {
arrived = true
// Modify the search interval based on the response
- if (d.mode == FullSync && !d.hasBlockAndState(headers[0].Hash())) || (d.mode != FullSync && !d.hasHeader(headers[0].Hash())) {
+ if (d.mode == FullSync && !d.chain.HasBlockAndState(headers[0].Hash())) || (d.mode != FullSync && !d.lightchain.HasHeader(headers[0].Hash())) {
end = check
break
}
- header := d.getHeader(headers[0].Hash()) // Independent of sync mode, header surely exists
+ header := d.lightchain.GetHeaderByHash(headers[0].Hash()) // Independent of sync mode, header surely exists
if header.Number.Uint64() != check {
p.log.Debug("Received non requested header", "number", header.Number, "hash", header.Hash(), "request", check)
return 0, errBadPeer
@@ -1124,23 +1148,19 @@ func (d *Downloader) processHeaders(origin uint64, td *big.Int) error {
for i, header := range rollback {
hashes[i] = header.Hash()
}
- lastHeader, lastFastBlock, lastBlock := d.headHeader().Number, common.Big0, common.Big0
- if d.headFastBlock != nil {
- lastFastBlock = d.headFastBlock().Number()
- }
- if d.headBlock != nil {
- lastBlock = d.headBlock().Number()
+ lastHeader, lastFastBlock, lastBlock := d.lightchain.CurrentHeader().Number, common.Big0, common.Big0
+ if d.mode != LightSync {
+ lastFastBlock = d.chain.CurrentFastBlock().Number()
+ lastBlock = d.chain.CurrentBlock().Number()
}
- d.rollback(hashes)
+ d.lightchain.Rollback(hashes)
curFastBlock, curBlock := common.Big0, common.Big0
- if d.headFastBlock != nil {
- curFastBlock = d.headFastBlock().Number()
- }
- if d.headBlock != nil {
- curBlock = d.headBlock().Number()
+ if d.mode != LightSync {
+ curFastBlock = d.chain.CurrentFastBlock().Number()
+ curBlock = d.chain.CurrentBlock().Number()
}
log.Warn("Rolled back headers", "count", len(hashes),
- "header", fmt.Sprintf("%d->%d", lastHeader, d.headHeader().Number),
+ "header", fmt.Sprintf("%d->%d", lastHeader, d.lightchain.CurrentHeader().Number),
"fast", fmt.Sprintf("%d->%d", lastFastBlock, curFastBlock),
"block", fmt.Sprintf("%d->%d", lastBlock, curBlock))
@@ -1190,7 +1210,7 @@ func (d *Downloader) processHeaders(origin uint64, td *big.Int) error {
// L: Request new headers up from 11 (R's TD was higher, it must have something)
// R: Nothing to give
if d.mode != LightSync {
- if !gotHeaders && td.Cmp(d.getTd(d.headBlock().Hash())) > 0 {
+ if !gotHeaders && td.Cmp(d.chain.GetTdByHash(d.chain.CurrentBlock().Hash())) > 0 {
return errStallingPeer
}
}
@@ -1202,7 +1222,7 @@ func (d *Downloader) processHeaders(origin uint64, td *big.Int) error {
// queued for processing when the header download completes. However, as long as the
// peer gave us something useful, we're already happy/progressed (above check).
if d.mode == FastSync || d.mode == LightSync {
- if td.Cmp(d.getTd(d.headHeader().Hash())) > 0 {
+ if td.Cmp(d.lightchain.GetTdByHash(d.lightchain.CurrentHeader().Hash())) > 0 {
return errStallingPeer
}
}
@@ -1232,7 +1252,7 @@ func (d *Downloader) processHeaders(origin uint64, td *big.Int) error {
// Collect the yet unknown headers to mark them as uncertain
unknown := make([]*types.Header, 0, len(headers))
for _, header := range chunk {
- if !d.hasHeader(header.Hash()) {
+ if !d.lightchain.HasHeader(header.Hash()) {
unknown = append(unknown, header)
}
}
@@ -1241,7 +1261,7 @@ func (d *Downloader) processHeaders(origin uint64, td *big.Int) error {
if chunk[len(chunk)-1].Number.Uint64()+uint64(fsHeaderForceVerify) > pivot {
frequency = 1
}
- if n, err := d.insertHeaders(chunk, frequency); err != nil {
+ if n, err := d.chain.InsertHeaderChain(chunk, frequency); err != nil {
// If some headers were inserted, add them too to the rollback list
if n > 0 {
rollback = append(rollback, chunk[:n]...)
@@ -1328,7 +1348,7 @@ func (d *Downloader) importBlockResults(results []*fetchResult) error {
for i, result := range results[:items] {
blocks[i] = types.NewBlockWithHeader(result.Header).WithBody(result.Transactions, result.Uncles)
}
- if index, err := d.insertBlocks(blocks); err != nil {
+ if index, err := d.chain.InsertChain(blocks); err != nil {
log.Debug("Downloaded item processing failed", "number", results[index].Header.Number, "hash", results[index].Header.Hash(), "err", err)
return errInvalidChain
}
@@ -1368,6 +1388,7 @@ func (d *Downloader) processFastSyncContent(latest *types.Header) error {
stateSync.Cancel()
if err := d.commitPivotBlock(P); err != nil {
return err
+
}
}
if err := d.importBlockResults(afterP); err != nil {
@@ -1416,7 +1437,7 @@ func (d *Downloader) commitFastSyncData(results []*fetchResult, stateSync *state
blocks[i] = types.NewBlockWithHeader(result.Header).WithBody(result.Transactions, result.Uncles)
receipts[i] = result.Receipts
}
- if index, err := d.insertReceipts(blocks, receipts); err != nil {
+ if index, err := d.chain.InsertReceiptChain(blocks, receipts); err != nil {
log.Debug("Downloaded item processing failed", "number", results[index].Header.Number, "hash", results[index].Header.Hash(), "err", err)
return errInvalidChain
}
@@ -1434,10 +1455,10 @@ func (d *Downloader) commitPivotBlock(result *fetchResult) error {
return err
}
log.Debug("Committing fast sync pivot as new head", "number", b.Number(), "hash", b.Hash())
- if _, err := d.insertReceipts([]*types.Block{b}, []types.Receipts{result.Receipts}); err != nil {
+ if _, err := d.chain.InsertReceiptChain([]*types.Block{b}, []types.Receipts{result.Receipts}); err != nil {
return err
}
- return d.commitHeadBlock(b.Hash())
+ return d.chain.FastSyncCommitHead(b.Hash())
}
// DeliverHeaders injects a new batch of block headers received from a remote
diff --git a/eth/downloader/downloader_test.go b/eth/downloader/downloader_test.go
index 1fb5a0910..5852127ea 100644
--- a/eth/downloader/downloader_test.go
+++ b/eth/downloader/downloader_test.go
@@ -96,9 +96,7 @@ func newTester() *downloadTester {
tester.stateDb, _ = ethdb.NewMemDatabase()
tester.stateDb.Put(genesis.Root().Bytes(), []byte{0x00})
- tester.downloader = New(FullSync, tester.stateDb, new(event.TypeMux), tester.hasHeader, tester.hasBlock, tester.getHeader,
- tester.getBlock, tester.headHeader, tester.headBlock, tester.headFastBlock, tester.commitHeadBlock, tester.getTd,
- tester.insertHeaders, tester.insertBlocks, tester.insertReceipts, tester.rollback, tester.dropPeer)
+ tester.downloader = New(FullSync, tester.stateDb, new(event.TypeMux), tester, nil, tester.dropPeer)
return tester
}
@@ -218,14 +216,14 @@ func (dl *downloadTester) sync(id string, td *big.Int, mode SyncMode) error {
return err
}
-// hasHeader checks if a header is present in the testers canonical chain.
-func (dl *downloadTester) hasHeader(hash common.Hash) bool {
- return dl.getHeader(hash) != nil
+// HasHeader checks if a header is present in the testers canonical chain.
+func (dl *downloadTester) HasHeader(hash common.Hash) bool {
+ return dl.GetHeaderByHash(hash) != nil
}
-// hasBlock checks if a block and associated state is present in the testers canonical chain.
-func (dl *downloadTester) hasBlock(hash common.Hash) bool {
- block := dl.getBlock(hash)
+// HasBlockAndState checks if a block and associated state is present in the testers canonical chain.
+func (dl *downloadTester) HasBlockAndState(hash common.Hash) bool {
+ block := dl.GetBlockByHash(hash)
if block == nil {
return false
}
@@ -233,24 +231,24 @@ func (dl *downloadTester) hasBlock(hash common.Hash) bool {
return err == nil
}
-// getHeader retrieves a header from the testers canonical chain.
-func (dl *downloadTester) getHeader(hash common.Hash) *types.Header {
+// GetHeader retrieves a header from the testers canonical chain.
+func (dl *downloadTester) GetHeaderByHash(hash common.Hash) *types.Header {
dl.lock.RLock()
defer dl.lock.RUnlock()
return dl.ownHeaders[hash]
}
-// getBlock retrieves a block from the testers canonical chain.
-func (dl *downloadTester) getBlock(hash common.Hash) *types.Block {
+// GetBlock retrieves a block from the testers canonical chain.
+func (dl *downloadTester) GetBlockByHash(hash common.Hash) *types.Block {
dl.lock.RLock()
defer dl.lock.RUnlock()
return dl.ownBlocks[hash]
}
-// headHeader retrieves the current head header from the canonical chain.
-func (dl *downloadTester) headHeader() *types.Header {
+// CurrentHeader retrieves the current head header from the canonical chain.
+func (dl *downloadTester) CurrentHeader() *types.Header {
dl.lock.RLock()
defer dl.lock.RUnlock()
@@ -262,8 +260,8 @@ func (dl *downloadTester) headHeader() *types.Header {
return dl.genesis.Header()
}
-// headBlock retrieves the current head block from the canonical chain.
-func (dl *downloadTester) headBlock() *types.Block {
+// CurrentBlock retrieves the current head block from the canonical chain.
+func (dl *downloadTester) CurrentBlock() *types.Block {
dl.lock.RLock()
defer dl.lock.RUnlock()
@@ -277,8 +275,8 @@ func (dl *downloadTester) headBlock() *types.Block {
return dl.genesis
}
-// headFastBlock retrieves the current head fast-sync block from the canonical chain.
-func (dl *downloadTester) headFastBlock() *types.Block {
+// CurrentFastBlock retrieves the current head fast-sync block from the canonical chain.
+func (dl *downloadTester) CurrentFastBlock() *types.Block {
dl.lock.RLock()
defer dl.lock.RUnlock()
@@ -290,26 +288,26 @@ func (dl *downloadTester) headFastBlock() *types.Block {
return dl.genesis
}
-// commitHeadBlock manually sets the head block to a given hash.
-func (dl *downloadTester) commitHeadBlock(hash common.Hash) error {
+// FastSynccommitHead manually sets the head block to a given hash.
+func (dl *downloadTester) FastSyncCommitHead(hash common.Hash) error {
// For now only check that the state trie is correct
- if block := dl.getBlock(hash); block != nil {
+ if block := dl.GetBlockByHash(hash); block != nil {
_, err := trie.NewSecure(block.Root(), dl.stateDb, 0)
return err
}
return fmt.Errorf("non existent block: %x", hash[:4])
}
-// getTd retrieves the block's total difficulty from the canonical chain.
-func (dl *downloadTester) getTd(hash common.Hash) *big.Int {
+// GetTdByHash retrieves the block's total difficulty from the canonical chain.
+func (dl *downloadTester) GetTdByHash(hash common.Hash) *big.Int {
dl.lock.RLock()
defer dl.lock.RUnlock()
return dl.ownChainTd[hash]
}
-// insertHeaders injects a new batch of headers into the simulated chain.
-func (dl *downloadTester) insertHeaders(headers []*types.Header, checkFreq int) (int, error) {
+// InsertHeaderChain injects a new batch of headers into the simulated chain.
+func (dl *downloadTester) InsertHeaderChain(headers []*types.Header, checkFreq int) (int, error) {
dl.lock.Lock()
defer dl.lock.Unlock()
@@ -337,8 +335,8 @@ func (dl *downloadTester) insertHeaders(headers []*types.Header, checkFreq int)
return len(headers), nil
}
-// insertBlocks injects a new batch of blocks into the simulated chain.
-func (dl *downloadTester) insertBlocks(blocks types.Blocks) (int, error) {
+// InsertChain injects a new batch of blocks into the simulated chain.
+func (dl *downloadTester) InsertChain(blocks types.Blocks) (int, error) {
dl.lock.Lock()
defer dl.lock.Unlock()
@@ -359,8 +357,8 @@ func (dl *downloadTester) insertBlocks(blocks types.Blocks) (int, error) {
return len(blocks), nil
}
-// insertReceipts injects a new batch of receipts into the simulated chain.
-func (dl *downloadTester) insertReceipts(blocks types.Blocks, receipts []types.Receipts) (int, error) {
+// InsertReceiptChain injects a new batch of receipts into the simulated chain.
+func (dl *downloadTester) InsertReceiptChain(blocks types.Blocks, receipts []types.Receipts) (int, error) {
dl.lock.Lock()
defer dl.lock.Unlock()
@@ -377,8 +375,8 @@ func (dl *downloadTester) insertReceipts(blocks types.Blocks, receipts []types.R
return len(blocks), nil
}
-// rollback removes some recently added elements from the chain.
-func (dl *downloadTester) rollback(hashes []common.Hash) {
+// Rollback removes some recently added elements from the chain.
+func (dl *downloadTester) Rollback(hashes []common.Hash) {
dl.lock.Lock()
defer dl.lock.Unlock()
@@ -1212,7 +1210,7 @@ func testInvalidHeaderRollback(t *testing.T, protocol int, mode SyncMode) {
if err := tester.sync("fast-attack", nil, mode); err == nil {
t.Fatalf("succeeded fast attacker synchronisation")
}
- if head := tester.headHeader().Number.Int64(); int(head) > MaxHeaderFetch {
+ if head := tester.CurrentHeader().Number.Int64(); int(head) > MaxHeaderFetch {
t.Errorf("rollback head mismatch: have %v, want at most %v", head, MaxHeaderFetch)
}
// Attempt to sync with an attacker that feeds junk during the block import phase.
@@ -1226,11 +1224,11 @@ func testInvalidHeaderRollback(t *testing.T, protocol int, mode SyncMode) {
if err := tester.sync("block-attack", nil, mode); err == nil {
t.Fatalf("succeeded block attacker synchronisation")
}
- if head := tester.headHeader().Number.Int64(); int(head) > 2*fsHeaderSafetyNet+MaxHeaderFetch {
+ if head := tester.CurrentHeader().Number.Int64(); int(head) > 2*fsHeaderSafetyNet+MaxHeaderFetch {
t.Errorf("rollback head mismatch: have %v, want at most %v", head, 2*fsHeaderSafetyNet+MaxHeaderFetch)
}
if mode == FastSync {
- if head := tester.headBlock().NumberU64(); head != 0 {
+ if head := tester.CurrentBlock().NumberU64(); head != 0 {
t.Errorf("fast sync pivot block #%d not rolled back", head)
}
}
@@ -1251,11 +1249,11 @@ func testInvalidHeaderRollback(t *testing.T, protocol int, mode SyncMode) {
if err := tester.sync("withhold-attack", nil, mode); err == nil {
t.Fatalf("succeeded withholding attacker synchronisation")
}
- if head := tester.headHeader().Number.Int64(); int(head) > 2*fsHeaderSafetyNet+MaxHeaderFetch {
+ if head := tester.CurrentHeader().Number.Int64(); int(head) > 2*fsHeaderSafetyNet+MaxHeaderFetch {
t.Errorf("rollback head mismatch: have %v, want at most %v", head, 2*fsHeaderSafetyNet+MaxHeaderFetch)
}
if mode == FastSync {
- if head := tester.headBlock().NumberU64(); head != 0 {
+ if head := tester.CurrentBlock().NumberU64(); head != 0 {
t.Errorf("fast sync pivot block #%d not rolled back", head)
}
}
diff --git a/eth/downloader/types.go b/eth/downloader/types.go
index e10510486..3f30ea9dd 100644
--- a/eth/downloader/types.go
+++ b/eth/downloader/types.go
@@ -18,51 +18,10 @@ package downloader
import (
"fmt"
- "math/big"
- "github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
-// headerCheckFn is a callback type for verifying a header's presence in the local chain.
-type headerCheckFn func(common.Hash) bool
-
-// blockAndStateCheckFn is a callback type for verifying block and associated states' presence in the local chain.
-type blockAndStateCheckFn func(common.Hash) bool
-
-// headerRetrievalFn is a callback type for retrieving a header from the local chain.
-type headerRetrievalFn func(common.Hash) *types.Header
-
-// blockRetrievalFn is a callback type for retrieving a block from the local chain.
-type blockRetrievalFn func(common.Hash) *types.Block
-
-// headHeaderRetrievalFn is a callback type for retrieving the head header from the local chain.
-type headHeaderRetrievalFn func() *types.Header
-
-// headBlockRetrievalFn is a callback type for retrieving the head block from the local chain.
-type headBlockRetrievalFn func() *types.Block
-
-// headFastBlockRetrievalFn is a callback type for retrieving the head fast block from the local chain.
-type headFastBlockRetrievalFn func() *types.Block
-
-// headBlockCommitterFn is a callback for directly committing the head block to a certain entity.
-type headBlockCommitterFn func(common.Hash) error
-
-// tdRetrievalFn is a callback type for retrieving the total difficulty of a local block.
-type tdRetrievalFn func(common.Hash) *big.Int
-
-// headerChainInsertFn is a callback type to insert a batch of headers into the local chain.
-type headerChainInsertFn func([]*types.Header, int) (int, error)
-
-// blockChainInsertFn is a callback type to insert a batch of blocks into the local chain.
-type blockChainInsertFn func(types.Blocks) (int, error)
-
-// receiptChainInsertFn is a callback type to insert a batch of receipts into the local chain.
-type receiptChainInsertFn func(types.Blocks, []types.Receipts) (int, error)
-
-// chainRollbackFn is a callback type to remove a few recently added elements from the local chain.
-type chainRollbackFn func([]common.Hash)
-
// peerDropFn is a callback type for dropping a peer detected as malicious.
type peerDropFn func(id string)
diff --git a/eth/handler.go b/eth/handler.go
index 1af9e755b..8d026c775 100644
--- a/eth/handler.go
+++ b/eth/handler.go
@@ -157,10 +157,7 @@ func NewProtocolManager(config *params.ChainConfig, mode downloader.SyncMode, ne
return nil, errIncompatibleConfig
}
// Construct the different synchronisation mechanisms
- manager.downloader = downloader.New(mode, chaindb, manager.eventMux, blockchain.HasHeader, blockchain.HasBlockAndState, blockchain.GetHeaderByHash,
- blockchain.GetBlockByHash, blockchain.CurrentHeader, blockchain.CurrentBlock, blockchain.CurrentFastBlock, blockchain.FastSyncCommitHead,
- blockchain.GetTdByHash, blockchain.InsertHeaderChain, manager.blockchain.InsertChain, blockchain.InsertReceiptChain, blockchain.Rollback,
- manager.removePeer)
+ manager.downloader = downloader.New(mode, chaindb, manager.eventMux, blockchain, nil, manager.removePeer)
validator := func(header *types.Header) error {
return engine.VerifyHeader(blockchain, header, true)
diff --git a/les/handler.go b/les/handler.go
index 77bc077a2..afd4356ef 100644
--- a/les/handler.go
+++ b/les/handler.go
@@ -206,9 +206,7 @@ func NewProtocolManager(chainConfig *params.ChainConfig, lightSync bool, network
}
if lightSync {
- manager.downloader = downloader.New(downloader.LightSync, chainDb, manager.eventMux, blockchain.HasHeader, nil, blockchain.GetHeaderByHash,
- nil, blockchain.CurrentHeader, nil, nil, nil, blockchain.GetTdByHash,
- blockchain.InsertHeaderChain, nil, nil, blockchain.Rollback, removePeer)
+ manager.downloader = downloader.New(downloader.LightSync, chainDb, manager.eventMux, nil, blockchain, removePeer)
manager.peers.notify((*downloaderPeerNotify)(manager))
manager.fetcher = newLightFetcher(manager)
}
diff --git a/light/lightchain.go b/light/lightchain.go
index 87436f4a5..ec7ca3a0c 100644
--- a/light/lightchain.go
+++ b/light/lightchain.go
@@ -389,6 +389,21 @@ func (self *LightChain) CurrentHeader() *types.Header {
return self.hc.CurrentHeader()
}
+// CurrentBlock exists for interface compatibility and always returns nil
+func (self *LightChain) CurrentBlock() *types.Block {
+ return nil
+}
+
+// CurrentFastBlock exists for interface compatibility and always returns nil
+func (self *LightChain) CurrentFastBlock() *types.Block {
+ return nil
+}
+
+// FastSyncCommitHead exists for interface compatibility and does nothing
+func (self *LightChain) FastSyncCommitHead(h common.Hash) error {
+ return nil
+}
+
// GetTd retrieves a block's total difficulty in the canonical chain from the
// database by hash and number, caching it if found.
func (self *LightChain) GetTd(hash common.Hash, number uint64) *big.Int {
--
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