[#416] innerring: Add gas threshold

On the `Deposit` events add gas balance check.
Make transfer only if the balance is greater
than the `GasTransferThreshold` that is defined
with environmental variable.

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

cmd/neofs-ir/defaults.go

@@ -94,6 +94,7 @@ func defaultConfiguration(cfg *viper.Viper) {
 	cfg.SetDefault("emit.mint.cache_size", 1000)
 	cfg.SetDefault("emit.mint.threshold", 1)
 	cfg.SetDefault("emit.mint.value", 20000000) // 0.2 Fixed8
+	cfg.SetDefault("emit.gas.balance_threshold", 0)
 
 	cfg.SetDefault("audit.task.exec_pool_size", 10)
 	cfg.SetDefault("audit.task.queue_capacity", 100)

pkg/innerring/innerring.go

@@ -499,6 +499,7 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 		MintEmitCacheSize:   cfg.GetInt("emit.mint.cache_size"),
 		MintEmitThreshold:   cfg.GetUint64("emit.mint.threshold"),
 		MintEmitValue:       fixedn.Fixed8(cfg.GetInt64("emit.mint.value")),
+		GasBalanceThreshold: cfg.GetInt64("emit.gas.balance_threshold"),
 	})
 	if err != nil {
 		return nil, err

pkg/innerring/processors/neofs/process_assets.go

@@ -53,6 +53,22 @@ func (np *Processor) processDeposit(deposit *neofsEvent.Deposit) {
 		return
 	}
 
+	// get gas balance of the node
+	// before gas transfer check if the balance is greater than threshold
+	balance, err := np.morphClient.GasBalance()
+	if err != nil {
+		np.log.Error("can't get gas balance of the node", zap.Error(err))
+		return
+	}
+
+	if balance < np.gasBalanceThreshold {
+		np.log.Warn("gas balance threshold has been reached",
+			zap.Int64("balance", balance),
+			zap.Int64("threshold", np.gasBalanceThreshold))
+
+		return
+	}
+
 	err = np.morphClient.TransferGas(receiver, np.mintEmitValue)
 	if err != nil {
 		np.log.Error("can't transfer native gas to receiver",

pkg/innerring/processors/neofs/processor.go

@@ -45,6 +45,7 @@ type (
 		mintEmitCache       *lru.Cache
 		mintEmitThreshold   uint64
 		mintEmitValue       fixedn.Fixed8
+		gasBalanceThreshold int64
 	}
 
 	// Params of the processor constructor.
@@ -61,6 +62,7 @@ type (
 		MintEmitCacheSize   int
 		MintEmitThreshold   uint64 // in epochs
 		MintEmitValue       fixedn.Fixed8
+		GasBalanceThreshold int64
 	}
 )
 
@@ -113,6 +115,7 @@ func New(p *Params) (*Processor, error) {
 		mintEmitCache:       lruCache,
 		mintEmitThreshold:   p.MintEmitThreshold,
 		mintEmitValue:       p.MintEmitValue,
+		gasBalanceThreshold: p.GasBalanceThreshold,
 	}, nil
 }