scripts: add script for containers and netmap entries comparison

May be used to check data consistency between different chain versions.

Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>

CHANGELOG.md

@@ -5,6 +5,7 @@ Changelog for NeoFS Contract
 
 ### Added
 - `verify` method for Alphabet contracts (#386)
+- script comparing some of NeoFS contract states (#399)
 
 ### Updated
 

LICENSE.md

@@ -9,6 +9,7 @@ Specifically, GPLv3 is used by code in these folders:
  * common
  * contracts
  * tests
+ * scripts
 
 Apache 2.0 is used in:
  * rpc

README.md

@@ -93,6 +93,11 @@ ok      github.com/nspcc-dev/neofs-contract/tests       0.462s
 |        v0.15.x         |                                  [v2.11.0](https://github.com/nspcc-dev/neofs-api/releases/tag/v2.11.0), [v2.12.0](https://github.com/nspcc-dev/neofs-api/releases/tag/v2.12.0)                                  |
 |        v0.16.x         |                                                                      [v2.14.0](https://github.com/nspcc-dev/neofs-api/releases/tag/v2.14.0)                       |        v0.17.x         |                                                                      [v2.14.0](https://github.com/nspcc-dev/neofs-api/releases/tag/v2.14.0)                                                                      |
 
+# Comparing contracts content of NeoFS chains
+`scripts` directory contains CLI utilities to compare some of the NeoFS contract
+contents between two RPC nodes:
+ * `compare-fscontent` performs comparison of container blobs and NetMap contract
+   entries.
 
 # License
 

scripts/compare-fscontent/compare-fscontent.go

@@ -0,0 +1,156 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"fmt"
+	"os"
+
+	"github.com/davecgh/go-spew/spew"
+	"github.com/nspcc-dev/neo-go/pkg/rpcclient"
+	"github.com/nspcc-dev/neo-go/pkg/rpcclient/invoker"
+	"github.com/nspcc-dev/neofs-contract/rpc/container"
+	"github.com/nspcc-dev/neofs-contract/rpc/netmap"
+	"github.com/nspcc-dev/neofs-contract/rpc/nns"
+	"github.com/pmezard/go-difflib/difflib"
+	"github.com/urfave/cli"
+)
+
+func initClient(addr string, name string) (*rpcclient.Client, uint32, error) {
+	c, err := rpcclient.New(context.Background(), addr, rpcclient.Options{})
+	if err != nil {
+		return nil, 0, fmt.Errorf("RPC %s: %w", name, err)
+	}
+	err = c.Init()
+	if err != nil {
+		return nil, 0, fmt.Errorf("RPC %s init: %w", name, err)
+	}
+	h, err := c.GetBlockCount()
+	if err != nil {
+		return nil, 0, fmt.Errorf("RPC %s block count: %w", name, err)
+	}
+	return c, h, nil
+}
+
+func getFSContent(c *rpcclient.Client) ([][]byte, []*netmap.NetmapNode, error) {
+	nnsState, err := c.GetContractStateByID(nns.ID)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to get NNS state: %w", err)
+	}
+	inv := invoker.New(c, nil)
+
+	nnsReader := nns.NewReader(inv, nnsState.Hash)
+	containerH, err := nnsReader.ResolveFSContract(nns.NameContainer)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to resolve container contract: %w", err)
+	}
+	reader := container.NewReader(inv, containerH)
+	containers, err := reader.List([]byte{})
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to list containers: %w", err)
+	}
+
+	netmapH, err := nnsReader.ResolveFSContract(nns.NameNetmap)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to resolve netmap contract: %w", err)
+	}
+	netmapReader := netmap.NewReader(inv, netmapH)
+	netmap, err := netmapReader.Netmap()
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to retrieve netmap: %w", err)
+	}
+	return containers, netmap, nil
+}
+
+func cliMain(c *cli.Context) error {
+	a := c.Args().Get(0)
+	b := c.Args().Get(1)
+	if a == "" {
+		return errors.New("no arguments given")
+	}
+	if b == "" {
+		return errors.New("missing second argument")
+	}
+	ca, ha, err := initClient(a, "A")
+	if err != nil {
+		return err
+	}
+	cb, hb, err := initClient(b, "B")
+	if err != nil {
+		return err
+	}
+	if ha != hb {
+		var diff = hb - ha
+		if ha > hb {
+			diff = ha - hb
+		}
+		if diff > 10 && !c.Bool("ignore-height") { // Allow some height drift.
+			return fmt.Errorf("chains have different heights: %d vs %d", ha, hb)
+		}
+	}
+	fmt.Printf("RPC %s height: %d\nRPC %s height: %d\n", a, ha, b, hb)
+
+	containersA, netmapA, err := getFSContent(ca)
+	if err != nil {
+		return fmt.Errorf("RPC %s: %w", a, err)
+	}
+	containersB, netmapB, err := getFSContent(cb)
+	if err != nil {
+		return fmt.Errorf("RPC %s: %w", b, err)
+	}
+
+	if len(containersA) != len(containersB) {
+		return fmt.Errorf("number of containers mismatch: %d vs %d", len(containersA), len(containersB))
+	}
+	fmt.Printf("number of containers checked: %d\n", len(containersA))
+	for i := range containersA {
+		if !bytes.Equal(containersA[i], containersB[i]) {
+			dumpContentDiff("container", i, a, b, containersA[i], containersB[i])
+		}
+	}
+
+	if len(netmapA) != len(netmapB) {
+		return fmt.Errorf("number of netmap entries mismatch: %d vs %d", len(netmapA), len(netmapB))
+	}
+	fmt.Printf("number of netmap entries checked: %d\n", len(netmapA))
+	for i := range netmapA {
+		if netmapA[i].State.Cmp(netmapB[i].State) != 0 || !bytes.Equal(netmapA[i].BLOB, netmapB[i].BLOB) {
+			dumpContentDiff("netmap entry", i, a, b, netmapA[i], netmapB[i])
+		}
+	}
+	return nil
+}
+
+func dumpContentDiff(itemName string, i int, a string, b string, itemA any, itemB any) {
+	fmt.Printf("%s %d:\n", itemName, i)
+	da := spew.Sdump(itemA)
+	db := spew.Sdump(itemB)
+	diff, _ := difflib.GetUnifiedDiffString(difflib.UnifiedDiff{
+		A:        difflib.SplitLines(da),
+		B:        difflib.SplitLines(db),
+		FromFile: a,
+		ToFile:   b,
+		Context:  1,
+	})
+	fmt.Println(diff)
+}
+
+func main() {
+	ctl := cli.NewApp()
+	ctl.Name = "compare-fscontent"
+	ctl.Version = "1.0"
+	ctl.Usage = "compare-fscontent RPC_A RPC_B"
+	ctl.Action = cliMain
+	ctl.Flags = []cli.Flag{
+		cli.BoolFlag{
+			Name:  "ignore-height, g",
+			Usage: "ignore height difference",
+		},
+	}
+
+	if err := ctl.Run(os.Args); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}