From 53b4d6d6d001392c833b846ac800f12f37a6741b Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Sun, 21 Feb 2021 12:26:18 +0300
Subject: [PATCH] [#396] ir: Support working with sidechain only

NeoFS contract can be deployed in sidechain instead of main chain.

Add `without_mainnet` config flag that can switch IR node to work with
sidechain only. By default this flag is unset.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 cmd/neofs-ir/defaults.go   |  2 ++
 pkg/innerring/innerring.go | 30 +++++++++++++++++++-----------
 2 files changed, 21 insertions(+), 11 deletions(-)

diff --git a/cmd/neofs-ir/defaults.go b/cmd/neofs-ir/defaults.go
index 1a48dbbe5..504871141 100644
--- a/cmd/neofs-ir/defaults.go
+++ b/cmd/neofs-ir/defaults.go
@@ -47,6 +47,8 @@ func defaultConfiguration(cfg *viper.Viper) {
 	cfg.SetDefault("metrics.address", ":9090")
 	cfg.SetDefault("metrics.shutdown_ttl", "30s")
 
+	cfg.SetDefault("without_mainnet", false)
+
 	cfg.SetDefault("morph.endpoint.client", "")
 	cfg.SetDefault("morph.endpoint.notification", "")
 	cfg.SetDefault("morph.dial_timeout", "10s")
diff --git a/pkg/innerring/innerring.go b/pkg/innerring/innerring.go
index 9f44a3c3f..c4a4b94a7 100644
--- a/pkg/innerring/innerring.go
+++ b/pkg/innerring/innerring.go
@@ -238,19 +238,27 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 		return nil, err
 	}
 
-	mainnetChain := morphChain
-	mainnetChain.name = mainnetPrefix
+	if cfg.GetBool("without_mainnet") {
+		// This works as long as event Listener starts listening loop once,
+		// otherwise Server.Start will run two similar routines.
+		// This behavior most likely will not change.
+		server.mainnetListener = server.morphListener
+		server.mainnetClient = server.morphClient
+	} else {
+		mainnetChain := morphChain
+		mainnetChain.name = mainnetPrefix
 
-	// create mainnet listener
-	server.mainnetListener, err = createListener(ctx, mainnetChain)
-	if err != nil {
-		return nil, err
-	}
+		// create mainnet listener
+		server.mainnetListener, err = createListener(ctx, mainnetChain)
+		if err != nil {
+			return nil, err
+		}
 
-	// create mainnet client
-	server.mainnetClient, err = createClient(ctx, mainnetChain)
-	if err != nil {
-		return nil, err
+		// create mainnet client
+		server.mainnetClient, err = createClient(ctx, mainnetChain)
+		if err != nil {
+			return nil, err
+		}
 	}
 
 	server.pubKey = crypto.MarshalPublicKey(&server.key.PublicKey)