stateroot: make vote/root extensibles live less

These are arbitrary numbers, but that's what C# node uses. maxRetries could be
set lower because we have exponential backoff anyway, but this works too.

pkg/services/stateroot/network.go

@@ -14,6 +14,8 @@ import (
 	"go.uber.org/zap"
 )
 
+const rootValidEndInc = 100
+
 // RelayCallback represents callback for sending validated state roots.
 type RelayCallback = func(*payload.Extensible)
 
@@ -91,7 +93,7 @@ func (s *service) sendValidatedRoot(r *state.MPTRoot, acc *wallet.Account) {
 	ep := &payload.Extensible{
 		Category:        Category,
 		ValidBlockStart: r.Index,
-		ValidBlockEnd:   r.Index + transaction.MaxValidUntilBlockIncrement,
+		ValidBlockEnd:   r.Index + rootValidEndInc,
 		Sender:          priv.GetScriptHash(),
 		Data:            w.Bytes(),
 		Witness: transaction.Witness{

pkg/services/stateroot/service.go

@@ -71,7 +71,7 @@ func New(cfg config.StateRoot, log *zap.Logger, bc blockchainer.Blockchainer, cb
 		blockCh:         make(chan *block.Block),
 		done:            make(chan struct{}),
 		timePerBlock:    time.Duration(bcConf.SecondsPerBlock) * time.Second,
-		maxRetries:      bcConf.ValidatorsCount + 1,
+		maxRetries:      voteValidEndInc,
 		relayExtensible: cb,
 	}
 

pkg/services/stateroot/validators.go

@@ -12,7 +12,10 @@ import (
 	"go.uber.org/zap"
 )
 
-const firstVoteResendDelay = 3 * time.Second
+const (
+	voteValidEndInc      = 10
+	firstVoteResendDelay = 3 * time.Second
+)
 
 // Run runs service instance in a separate goroutine.
 func (s *service) Run() {
@@ -85,7 +88,7 @@ func (s *service) signAndSend(r *state.MPTRoot) error {
 	e := &payload.Extensible{
 		Category:        Category,
 		ValidBlockStart: r.Index,
-		ValidBlockEnd:   r.Index + transaction.MaxValidUntilBlockIncrement,
+		ValidBlockEnd:   r.Index + voteValidEndInc,
 		Sender:          acc.PrivateKey().GetScriptHash(),
 		Data:            w.Bytes(),
 		Witness: transaction.Witness{