From cbfaceb95666f911409c8491274ebd2237b88ed0 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Tue, 9 Feb 2021 17:36:43 +0300
Subject: [PATCH] [#316] ir/netmap: Validate network map candidates in Netmap
 processor

Define NodeValidator interface of the entity that checks and finalizes
NodeInfo structure. Add NodeValidator to Netmap processor. Pass NodeInfo
structures of network map candidates to NodeValidator in order to verify it
and prepare to final state required by network.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 .../processors/netmap/process_peers.go        | 10 ++++++++
 pkg/innerring/processors/netmap/processor.go  | 24 +++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/pkg/innerring/processors/netmap/process_peers.go b/pkg/innerring/processors/netmap/process_peers.go
index 5b9453c4..045fda35 100644
--- a/pkg/innerring/processors/netmap/process_peers.go
+++ b/pkg/innerring/processors/netmap/process_peers.go
@@ -25,6 +25,16 @@ func (np *Processor) processAddPeer(node []byte) {
 		return
 	}
 
+	// validate and update node info
+	err := np.nodeValidator.VerifyAndUpdate(nodeInfo)
+	if err != nil {
+		np.log.Warn("could not verify and update information about network map candidate",
+			zap.String("error", err.Error()),
+		)
+
+		return
+	}
+
 	keyString := hex.EncodeToString(nodeInfo.PublicKey())
 
 	exists := np.netmapSnapshot.touch(keyString, np.epochState.EpochCounter())
diff --git a/pkg/innerring/processors/netmap/processor.go b/pkg/innerring/processors/netmap/processor.go
index b84e40dc..9f3c6271 100644
--- a/pkg/innerring/processors/netmap/processor.go
+++ b/pkg/innerring/processors/netmap/processor.go
@@ -2,6 +2,7 @@ package netmap
 
 import (
 	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/client"
 	container "github.com/nspcc-dev/neofs-node/pkg/morph/client/container/wrapper"
 	"github.com/nspcc-dev/neofs-node/pkg/morph/event"
@@ -28,6 +29,21 @@ type (
 		IsActive() bool
 	}
 
+	// NodeValidator wraps basic method of checking the correctness
+	// of information about the node and its finalization for adding
+	// to the network map.
+	NodeValidator interface {
+		// Must verify and update NodeInfo structure.
+		//
+		// Must return an error if NodeInfo input is invalid.
+		// Must return an error if it is not possible to correctly
+		// change the structure for sending to the network map.
+		//
+		// If no error occurs, the parameter must point to the
+		// ready-made NodeInfo structure.
+		VerifyAndUpdate(*netmap.NodeInfo) error
+	}
+
 	// Processor of events produced by network map contract
 	// and new epoch ticker, because it is related to contract.
 	Processor struct {
@@ -45,6 +61,8 @@ type (
 
 		handleNewAudit         event.Handler
 		handleAuditSettlements event.Handler
+
+		nodeValidator NodeValidator
 	}
 
 	// Params of the processor constructor.
@@ -62,6 +80,8 @@ type (
 
 		HandleAudit             event.Handler
 		AuditSettlementsHandler event.Handler
+
+		NodeValidator NodeValidator
 	}
 )
 
@@ -90,6 +110,8 @@ func New(p *Params) (*Processor, error) {
 		return nil, errors.New("ir/netmap: audit settlement handler is not set")
 	case p.ContainerWrapper == nil:
 		return nil, errors.New("ir/netmap: container contract wrapper is not set")
+	case p.NodeValidator == nil:
+		return nil, errors.New("ir/netmap: node validator is not set")
 	}
 
 	p.Log.Debug("netmap worker pool", zap.Int("size", p.PoolSize))
@@ -112,6 +134,8 @@ func New(p *Params) (*Processor, error) {
 		handleNewAudit: p.HandleAudit,
 
 		handleAuditSettlements: p.AuditSettlementsHandler,
+
+		nodeValidator: p.NodeValidator,
 	}, nil
 }