core, dex, internal: block proposer syncing (first iteration) (#96)

* dex, internal: block proposer syncing (first iteration)

* core: find block from db if not in memory

This fix handles stopping proposing and then restarting

* core: no need to reorg when reset

Dexon will not fork. This commit also fix when a block confirm but
its parent is not in db yet, during restarting proposing.

* dex: always accept NewBlockMsg, NewBlockHashesMsg

We need to accept NewBlockMsg, NewBlockHashesMsg to sync current block with
other peers in block proposer mode when syncing lattice data. It's a waste
when the node is synced and start proposing.

Todo: control msg processing on/off more granular, accept NewBlockMsg,
NewBlockHashesMsg when syncing, but stop when synced.

1 files changed, 0 insertions, 19 deletions

diff --git a/les/handler_test.go b/les/handler_test.go
index 6ef6da8e9..eece82a28 100644
--- a/les/handler_test.go
+++ b/les/handler_test.go
@@ -561,23 +561,4 @@ func TestTransactionStatusLes2(t *testing.T) {
 	block1hash := rawdb.ReadCanonicalHash(db, 1)
 	test(tx1, false, txStatus{Status: core.TxStatusIncluded, Lookup: &rawdb.TxLookupEntry{BlockHash: block1hash, BlockIndex: 1, Index: 0}})
 	test(tx2, false, txStatus{Status: core.TxStatusIncluded, Lookup: &rawdb.TxLookupEntry{BlockHash: block1hash, BlockIndex: 1, Index: 1}})
-
-	// create a reorg that rolls them back
-	gchain, _ = core.GenerateChain(params.TestChainConfig, chain.GetBlockByNumber(0), ethash.NewFaker(), db, 2, func(i int, block *core.BlockGen) {})
-	if _, err := chain.InsertChain(gchain); err != nil {
-		panic(err)
-	}
-	// wait until TxPool processes the reorg
-	for i := 0; i < 10; i++ {
-		if pending, _ := txpool.Stats(); pending == 3 {
-			break
-		}
-		time.Sleep(100 * time.Millisecond)
-	}
-	if pending, _ := txpool.Stats(); pending != 3 {
-		t.Fatalf("pending count mismatch: have %d, want 3", pending)
-	}
-	// check if their status is pending again
-	test(tx1, false, txStatus{Status: core.TxStatusPending})
-	test(tx2, false, txStatus{Status: core.TxStatusPending})
 }