close #50 , reduce reorged blocks

consensus/posa/amazon.go

@@ -9,7 +9,7 @@ import (
 //
 // The Amazon Hardfork includes the following upgrades:
 //   - KCC Staking Contract: Add a new method to migrate GoDao's KCS
-//   - KCC Peg Token: Add a method to migrate stuck tokens
+//   - KCC Peg Token: Add a method to migrate tokens
 //   - Consensus: Reduce reorged blocks
 //
 

consensus/posa/posa.go

@@ -1044,10 +1044,16 @@ func (c *POSA) Seal(chain consensus.ChainHeaderReader, block *types.Block, resul
 	delay := time.Unix(int64(header.Time), 0).Sub(time.Now()) // nolint: gosimple
 	if header.Difficulty.Cmp(diffNoTurn) == 0 {
 		// It's not our turn explicitly to sign, delay it a bit
-		wiggle := time.Duration(len(snap.Validators)/2+1) * wiggleTime
-		delay += time.Duration(rand.Int63n(int64(wiggle)))
+		wiggleMax := time.Duration(len(snap.Validators)/2+1) * wiggleTime
+		wiggle := time.Duration(rand.Int63n(int64(wiggleMax)))
 
-		log.Trace("Out-of-turn signing requested", "wiggle", common.PrettyDuration(wiggle))
+		if wiggle < wiggleTime {
+			wiggle = wiggleTime
+		}
+
+		delay += wiggle
+
+		log.Trace("Out-of-turn signing requested", "wiggle", common.PrettyDuration(wiggleMax))
 	}
 	// Sign all the things!
 	sighash, err := signFn(accounts.Account{Address: val}, accounts.MimetypePOSA, POSARLP(header))