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, 8 deletions

diff --git a/dex/handler.go b/dex/handler.go
index 9174d8516..ff87884d2 100644
--- a/dex/handler.go
+++ b/dex/handler.go
@@ -713,10 +713,6 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 		}
 
 	case msg.Code == NewBlockHashesMsg:
-		// Ignore new block hash messages in block proposer mode.
-		if pm.isBlockProposer {
-			break
-		}
 		var announces newBlockHashesData
 		if err := msg.Decode(&announces); err != nil {
 			return errResp(ErrDecode, "%v: %v", msg, err)
@@ -737,10 +733,6 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 		}
 
 	case msg.Code == NewBlockMsg:
-		// Ignore new block messages in block proposer mode.
-		if pm.isBlockProposer {
-			break
-		}
 		// Retrieve and decode the propagated block
 		var block types.Block
 		if err := msg.Decode(&block); err != nil {