Add Inner Ring code

cmd/neofs-node/modules/morph/balance.go

@@ -0,0 +1,69 @@
+package morph
+
+import (
+	contract "github.com/nspcc-dev/neofs-node/pkg/morph/client/balance"
+	clientWrapper "github.com/nspcc-dev/neofs-node/pkg/morph/client/balance/wrapper"
+	accounting "github.com/nspcc-dev/neofs-node/pkg/network/transport/accounting/grpc"
+	"github.com/pkg/errors"
+	"go.uber.org/dig"
+)
+
+type balanceContractResult struct {
+	dig.Out
+
+	Client *clientWrapper.Wrapper
+
+	AccountingService accounting.Service
+}
+
+// BalanceContractName is a name of Balance contract config sub-section.
+const BalanceContractName = "balance"
+
+const (
+	balanceContractBalanceOfOpt = "balance_of_method"
+
+	balanceContractDecimalsOfOpt = "decimals_method"
+)
+
+// BalanceContractBalanceOfOptPath is a path to balanceOf method name option.
+func BalanceContractBalanceOfOptPath() string {
+	return optPath(prefix, BalanceContractName, balanceContractBalanceOfOpt)
+}
+
+// BalanceContractDecimalsOfOptPath is a path to decimals method name option.
+func BalanceContractDecimalsOfOptPath() string {
+	return optPath(prefix, BalanceContractName, balanceContractDecimalsOfOpt)
+}
+
+func newBalanceContract(p contractParams) (res balanceContractResult, err error) {
+	client, ok := p.MorphContracts[BalanceContractName]
+	if !ok {
+		err = errors.Errorf("missing %s contract client", BalanceContractName)
+		return
+	}
+
+	var (
+		balanceOfMethod = p.Viper.GetString(BalanceContractBalanceOfOptPath())
+		decimalsMethod  = p.Viper.GetString(BalanceContractDecimalsOfOptPath())
+	)
+
+	var c *contract.Client
+	if c, err = contract.New(client,
+		contract.WithBalanceOfMethod(balanceOfMethod),
+		contract.WithDecimalsMethod(decimalsMethod),
+	); err != nil {
+		return
+	}
+
+	if res.Client, err = clientWrapper.New(c); err != nil {
+		return
+	}
+
+	if res.AccountingService, err = accounting.New(accounting.Params{
+		ContractClient: res.Client,
+	}); err != nil {
+		return
+	}
+
+	return
+}