[#681] ir: Do not require MainNet attributes

If `WITHOUT_MAINNET` environmental variable is
`true`:
- Do not read `NeoFS` and `processing`
script-hashes from envs;
- Do not init Governance processor;
- Do not init NeoFS processor.

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

CHANGELOG.md

@@ -3,6 +3,9 @@ Changelog for NeoFS Node
 
 ## [Unreleased]
 
+### Fixed
+- Do not require MainNet attributes in "Without MainNet" mode ([#663](https://github.com/nspcc-dev/neofs-node/issues/663)).
+
 ## [0.22.2] - 2021-07-07
 
 Updated broken version of NeoFS API Go.

pkg/innerring/innerring.go

@@ -305,8 +305,10 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 
 	fmt.Println(hex.EncodeToString(server.key.PublicKey().Bytes()))
 
+	withoutMainNet := cfg.GetBool("without_mainnet")
+
 	// get all script hashes of contracts
-	server.contracts, err = parseContracts(cfg)
+	server.contracts, err = parseContracts(cfg, withoutMainNet)
 	if err != nil {
 		return nil, err
 	}
@@ -342,8 +344,6 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 		return nil, err
 	}
 
-	withoutMainNet := cfg.GetBool("without_mainnet")
-
 	if withoutMainNet {
 		// This works as long as event Listener starts listening loop once,
 		// otherwise Server.Start will run two similar routines.
@@ -525,6 +525,13 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 		return nil, err
 	}
 
+	var alphaSync event.Handler
+
+	if withoutMainNet {
+		alphaSync = func(event.Event) {
+			log.Debug("alphabet keys sync is disabled")
+		}
+	} else {
 		// create governance processor
 		governanceProcessor, err := governance.New(&governance.Params{
 			Log:            log,
@@ -541,13 +548,6 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 			return nil, err
 		}
 
-	var alphaSync event.Handler
-
-	if withoutMainNet {
-		alphaSync = func(event.Event) {
-			log.Debug("alphabet keys sync is disabled")
-		}
-	} else {
 		alphaSync = governanceProcessor.HandleAlphabetSync
 		err = bindMainnetProcessor(governanceProcessor, server)
 		if err != nil {
@@ -625,6 +625,7 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 		return nil, err
 	}
 
+	if !withoutMainNet {
 		// create mainnnet neofs processor
 		neofsProcessor, err := neofs.New(&neofs.Params{
 			Log:                 log,
@@ -650,6 +651,7 @@ func New(ctx context.Context, log *zap.Logger, cfg *viper.Viper) (*Server, error
 		if err != nil {
 			return nil, err
 		}
+	}
 
 	// create alphabet processor
 	alphabetProcessor, err := alphabet.New(&alphabet.Params{
@@ -828,19 +830,29 @@ func createClient(ctx context.Context, p *chainParams, notaryOpts ...client.Nota
 	)
 }
 
-func parseContracts(cfg *viper.Viper) (*contracts, error) {
+func parseContracts(cfg *viper.Viper, withoutMainNet bool) (*contracts, error) {
 	var (
 		result = new(contracts)
 		err    error
 	)
 
+	if !withoutMainNet {
+		result.neofs, err = util.Uint160DecodeStringLE(cfg.GetString("contracts.neofs"))
+		if err != nil {
+			return nil, fmt.Errorf("ir: can't read neofs script-hash: %w", err)
+		}
+
+		result.processing, err = util.Uint160DecodeStringLE(cfg.GetString("contracts.processing"))
+		if err != nil {
+			return nil, fmt.Errorf("ir: can't read processing script-hash: %w", err)
+		}
+	}
+
 	netmapContractStr := cfg.GetString("contracts.netmap")
-	neofsContractStr := cfg.GetString("contracts.neofs")
 	balanceContractStr := cfg.GetString("contracts.balance")
 	containerContractStr := cfg.GetString("contracts.container")
 	auditContractStr := cfg.GetString("contracts.audit")
 	proxyContractStr := cfg.GetString("contracts.proxy")
-	processingContractStr := cfg.GetString("contracts.processing")
 	reputationContractStr := cfg.GetString("contracts.reputation")
 	neofsIDContractStr := cfg.GetString("contracts.neofsid")
 
@@ -849,11 +861,6 @@ func parseContracts(cfg *viper.Viper) (*contracts, error) {
 		return nil, fmt.Errorf("ir: can't read netmap script-hash: %w", err)
 	}
 
-	result.neofs, err = util.Uint160DecodeStringLE(neofsContractStr)
-	if err != nil {
-		return nil, fmt.Errorf("ir: can't read neofs script-hash: %w", err)
-	}
-
 	result.balance, err = util.Uint160DecodeStringLE(balanceContractStr)
 	if err != nil {
 		return nil, fmt.Errorf("ir: can't read balance script-hash: %w", err)
@@ -874,11 +881,6 @@ func parseContracts(cfg *viper.Viper) (*contracts, error) {
 		return nil, fmt.Errorf("ir: can't read proxy script-hash: %w", err)
 	}
 
-	result.processing, err = util.Uint160DecodeStringLE(processingContractStr)
-	if err != nil {
-		return nil, fmt.Errorf("ir: can't read processing script-hash: %w", err)
-	}
-
 	result.reputation, err = util.Uint160DecodeStringLE(reputationContractStr)
 	if err != nil {
 		return nil, fmt.Errorf("ir: can't read reputation script-hash: %w", err)