[#7] Add container processor for inner ring

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/innerring/processors/container/handlers.go

@@ -0,0 +1,28 @@
+package container
+
+import (
+	"crypto/sha256"
+
+	"github.com/mr-tron/base58"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
+	containerEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/container"
+	"go.uber.org/zap"
+)
+
+func (cp *Processor) handlePut(ev event.Event) {
+	put := ev.(containerEvent.Put) // todo: check panic in production
+
+	id := sha256.Sum256(put.Container())
+	cp.log.Info("notification",
+		zap.String("type", "container put"),
+		zap.String("id", base58.Encode(id[:])))
+
+	// send event to the worker pool
+
+	err := cp.pool.Submit(func() { cp.processContainerPut(&put) })
+	if err != nil {
+		// todo: move into controlled degradation stage
+		cp.log.Warn("container processor worker pool drained",
+			zap.Int("capacity", cp.pool.Cap()))
+	}
+}

pkg/innerring/processors/container/process_container.go

@@ -0,0 +1,26 @@
+package container
+
+import (
+	"github.com/nspcc-dev/neofs-node/pkg/innerring/invoke"
+	containerEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/container"
+	"go.uber.org/zap"
+)
+
+// Process new container from the user by checking container sanity
+// and sending approve tx back to morph.
+func (cp *Processor) processContainerPut(put *containerEvent.Put) {
+	if !cp.activeState.IsActive() {
+		cp.log.Info("passive mode, ignore container put")
+		return
+	}
+
+	err := invoke.RegisterContainer(cp.morphClient, cp.containerContract,
+		&invoke.ContainerParams{
+			Key:       put.PublicKey(),
+			Container: put.Container(),
+			Signature: put.Signature(),
+		})
+	if err != nil {
+		cp.log.Error("can't invoke new container", zap.Error(err))
+	}
+}

pkg/innerring/processors/container/processor.go

@@ -0,0 +1,100 @@
+package container
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
+	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
+	containerEvent "github.com/nspcc-dev/neofs-node/pkg/morph/event/container"
+	"github.com/panjf2000/ants/v2"
+	"github.com/pkg/errors"
+	"go.uber.org/zap"
+)
+
+type (
+	// ActiveState is a callback interface for inner ring global state.
+	ActiveState interface {
+		IsActive() bool
+	}
+
+	// Processor of events produced by container contract in morph chain.
+	Processor struct {
+		log               *zap.Logger
+		pool              *ants.Pool
+		containerContract util.Uint160
+		morphClient       *client.Client
+		activeState       ActiveState
+	}
+
+	// Params of the processor constructor.
+	Params struct {
+		Log               *zap.Logger
+		PoolSize          int
+		ContainerContract util.Uint160
+		MorphClient       *client.Client
+		ActiveState       ActiveState
+	}
+)
+
+const (
+	putNotification = "containerPut"
+)
+
+// New creates container contract processor instance.
+func New(p *Params) (*Processor, error) {
+	switch {
+	case p.Log == nil:
+		return nil, errors.New("ir/container: logger is not set")
+	case p.MorphClient == nil:
+		return nil, errors.New("ir/container: neo:morph client is not set")
+	case p.ActiveState == nil:
+		return nil, errors.New("ir/container: global state is not set")
+	}
+
+	p.Log.Debug("container worker pool", zap.Int("size", p.PoolSize))
+
+	pool, err := ants.NewPool(p.PoolSize, ants.WithNonblocking(true))
+	if err != nil {
+		return nil, errors.Wrap(err, "ir/container: can't create worker pool")
+	}
+
+	return &Processor{
+		log:               p.Log,
+		pool:              pool,
+		containerContract: p.ContainerContract,
+		morphClient:       p.MorphClient,
+		activeState:       p.ActiveState,
+	}, nil
+}
+
+// ListenerParsers for the 'event.Listener' event producer.
+func (cp *Processor) ListenerParsers() []event.ParserInfo {
+	var parsers []event.ParserInfo
+
+	// container put event
+	deposit := event.ParserInfo{}
+	deposit.SetType(putNotification)
+	deposit.SetScriptHash(cp.containerContract)
+	deposit.SetParser(containerEvent.ParsePut)
+	parsers = append(parsers, deposit)
+
+	return parsers
+}
+
+// ListenerHandlers for the 'event.Listener' event producer.
+func (cp *Processor) ListenerHandlers() []event.HandlerInfo {
+	var handlers []event.HandlerInfo
+
+	// container put handler
+	deposit := event.HandlerInfo{}
+	deposit.SetType(putNotification)
+	deposit.SetScriptHash(cp.containerContract)
+	deposit.SetHandler(cp.handlePut)
+	handlers = append(handlers, deposit)
+
+	return handlers
+}
+
+// TimersHandlers for the 'Timers' event producer.
+func (cp *Processor) TimersHandlers() []event.HandlerInfo {
+	return nil
+}