From f11ae1035dc9aa2640af4983be24d43d47a96a2b Mon Sep 17 00:00:00 2001
From: Alex Vanin <alexey@nspcc.ru>
Date: Tue, 8 Sep 2020 12:01:38 +0300
Subject: [PATCH] [#21] ir: Add config relay processor

Signed-off-by: Alex Vanin <alexey@nspcc.ru>
---
 pkg/innerring/processors/neofs/handlers.go    | 17 ++++++++++++
 .../processors/neofs/process_config.go        | 26 +++++++++++++++++++
 pkg/innerring/processors/neofs/processor.go   | 15 +++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 pkg/innerring/processors/neofs/process_config.go

diff --git a/pkg/innerring/processors/neofs/handlers.go b/pkg/innerring/processors/neofs/handlers.go
index a64f6e771..d956295cf 100644
--- a/pkg/innerring/processors/neofs/handlers.go
+++ b/pkg/innerring/processors/neofs/handlers.go
@@ -55,3 +55,20 @@ func (np *Processor) handleCheque(ev event.Event) {
 			zap.Int("capacity", np.pool.Cap()))
 	}
 }
+
+func (np *Processor) handleConfig(ev event.Event) {
+	cfg := ev.(neofsEvent.Config) // todo: check panic in production
+	np.log.Info("notification",
+		zap.String("type", "set config"),
+		zap.String("key", hex.EncodeToString(cfg.Key())),
+		zap.String("value", hex.EncodeToString(cfg.Value())))
+
+	// send event to the worker pool
+
+	err := np.pool.Submit(func() { np.processConfig(&cfg) })
+	if err != nil {
+		// todo: move into controlled degradation stage
+		np.log.Warn("neofs processor worker pool drained",
+			zap.Int("capacity", np.pool.Cap()))
+	}
+}
diff --git a/pkg/innerring/processors/neofs/process_config.go b/pkg/innerring/processors/neofs/process_config.go
new file mode 100644
index 000000000..407884640
--- /dev/null
+++ b/pkg/innerring/processors/neofs/process_config.go
@@ -0,0 +1,26 @@
+package neofs
+
+import (
+	"github.com/nspcc-dev/neofs-node/pkg/innerring/invoke"
+	neofsEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/neofs"
+	"go.uber.org/zap"
+)
+
+// Process config event by setting configuration value from main chain in
+// side chain.
+func (np *Processor) processConfig(config *neofsEvent.Config) {
+	if !np.activeState.IsActive() {
+		np.log.Info("passive mode, ignore deposit")
+		return
+	}
+
+	err := invoke.SetConfig(np.morphClient, np.netmapContract,
+		&invoke.SetConfigArgs{
+			Key:   config.Key(),
+			Value: config.Value(),
+		},
+	)
+	if err != nil {
+		np.log.Error("can't relay set config event", zap.Error(err))
+	}
+}
diff --git a/pkg/innerring/processors/neofs/processor.go b/pkg/innerring/processors/neofs/processor.go
index b4eca268a..9541d0189 100644
--- a/pkg/innerring/processors/neofs/processor.go
+++ b/pkg/innerring/processors/neofs/processor.go
@@ -50,6 +50,7 @@ const (
 	depositNotification  = "Deposit"
 	withdrawNotification = "Withdraw"
 	chequeNotification   = "Cheque"
+	configNotification   = "SetConfig"
 )
 
 // New creates neofs mainnet contract processor instance.
@@ -109,6 +110,13 @@ func (np *Processor) ListenerParsers() []event.ParserInfo {
 	cheque.SetParser(neofsEvent.ParseCheque)
 	parsers = append(parsers, cheque)
 
+	// config event
+	config := event.ParserInfo{}
+	config.SetType(configNotification)
+	config.SetScriptHash(np.neofsContract)
+	config.SetParser(neofsEvent.ParseConfig)
+	parsers = append(parsers, config)
+
 	return parsers
 }
 
@@ -137,6 +145,13 @@ func (np *Processor) ListenerHandlers() []event.HandlerInfo {
 	cheque.SetHandler(np.handleCheque)
 	handlers = append(handlers, cheque)
 
+	// config handler
+	config := event.HandlerInfo{}
+	config.SetType(configNotification)
+	config.SetScriptHash(np.neofsContract)
+	config.SetHandler(np.handleConfig)
+	handlers = append(handlers, config)
+
 	return handlers
 }