gaspersic/go-ethereum
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downloader: added missing blocks catchup functionality

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When a parent is missing in the block list an attempt should be made to
fetch the missing parent and grandparents.
This commit is contained in:
obscuren
2015-04-13 16:38:32 +02:00
parent 7dcb9825c3
commit a8a2b2a488
4 changed files with 304 additions and 134 deletions
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37
eth/downloader/downloader_test.go
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@ -14,7 +14,7 @@ import (
var knownHash = common.Hash{1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
func createHashes(amount int) (hashes []common.Hash) {
func createHashes(start, amount int) (hashes []common.Hash) {
hashes = make([]common.Hash, amount+1)
hashes[len(hashes)-1] = knownHash
@ -49,7 +49,7 @@ type downloadTester struct {
func newTester(t *testing.T, hashes []common.Hash, blocks map[common.Hash]*types.Block) *downloadTester {
tester := &downloadTester{t: t, hashes: hashes, blocks: blocks, done: make(chan bool)}
downloader := New(tester.hasBlock, tester.insertChain)
downloader := New(tester.hasBlock, tester.insertChain, func() *big.Int { return new(big.Int) })
tester.downloader = downloader
return tester
@ -84,7 +84,7 @@ func (dl *downloadTester) getBlocks(id string) func([]common.Hash) error {
blocks[i] = dl.blocks[hash]
}
go dl.downloader.DeliverBlocks(id, blocks)
go dl.downloader.DeliverChunk(id, blocks)
return nil
}
@ -109,11 +109,11 @@ func TestDownload(t *testing.T) {
glog.SetV(logger.Detail)
glog.SetToStderr(true)
hashes := createHashes(1000)
hashes := createHashes(0, 1000)
blocks := createBlocksFromHashes(hashes)
tester := newTester(t, hashes, blocks)
tester.newPeer("peer1", big.NewInt(10000), hashes[len(hashes)-1])
tester.newPeer("peer1", big.NewInt(10000), hashes[0])
tester.newPeer("peer2", big.NewInt(0), common.Hash{})
tester.badBlocksPeer("peer3", big.NewInt(0), common.Hash{})
tester.badBlocksPeer("peer4", big.NewInt(0), common.Hash{})
@ -126,3 +126,30 @@ success:
t.Error("timout")
}
}
func TestMissing(t *testing.T) {
t.Skip()
glog.SetV(logger.Detail)
glog.SetToStderr(true)
hashes := createHashes(0, 1000)
extraHashes := createHashes(1001, 1003)
blocks := createBlocksFromHashes(append(extraHashes, hashes...))
tester := newTester(t, hashes, blocks)
tester.newPeer("peer1", big.NewInt(10000), hashes[len(hashes)-1])
hashes = append(extraHashes, hashes[:len(hashes)-1]...)
tester.newPeer("peer2", big.NewInt(0), common.Hash{})
success1:
select {
case <-tester.done:
break success1
case <-time.After(10 * time.Second): // XXX this could actually fail on a slow computer
t.Error("timout")
}
tester.downloader.AddBlock("peer2", blocks[hashes[len(hashes)-1]], big.NewInt(10001))
}