[#128] IR: Do not try to emit GAS to nobody

Fix sending GAS to an empty extra wallets receivers list. Also, send GAS to
extra wallets even if netmap is empty.

Signed-off-by: Pavel Karpy <p.karpy@yadro.com>

pkg/innerring/processors/alphabet/process_emit.go

@@ -49,15 +49,18 @@ func (ap *Processor) processEmit() {
 	}
 
 	nmNodes := networkMap.Nodes()
+	nmLen := len(nmNodes)
+	extraLen := len(ap.parsedWallets)
 
-	ln := len(nmNodes)
+	ap.log.Debug("gas emission",
-	if ln == 0 {
+		zap.Int("network_map", nmLen),
-		ap.log.Debug("empty network map, do not emit gas")
+		zap.Int("extra_wallets", extraLen))
 
+	if nmLen+extraLen == 0 {
 		return
 	}
 
-	gasPerNode := fixedn.Fixed8(ap.storageEmission / uint64(ln+len(ap.parsedWallets)))
+	gasPerNode := fixedn.Fixed8(ap.storageEmission / uint64(nmLen+extraLen))
 
 	for i := range nmNodes {
 		keyBytes := nmNodes[i].PublicKey()
@@ -80,9 +83,10 @@ func (ap *Processor) processEmit() {
 		}
 	}
 
+	if extraLen != 0 {
 		err = ap.morphClient.BatchTransferGas(ap.parsedWallets, gasPerNode)
 		if err != nil {
-		receiversLog := make([]string, len(ap.parsedWallets))
+			receiversLog := make([]string, extraLen)
 			for i, addr := range ap.parsedWallets {
 				receiversLog[i] = addr.StringLE()
 			}
@@ -93,3 +97,4 @@ func (ap *Processor) processEmit() {
 			)
 		}
 	}
+}