[#979] adm: Deploy missing contracts during updating

Make `nnsResolveHash` function to return declared error on `token not
found` fault exception. Catch this error in `deployContracts` method,
and switch to deployment if updating contract is missing.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

cmd/neofs-adm/internal/modules/morph/initialize.go

@@ -57,13 +57,13 @@ func initializeSideChainCmd(cmd *cobra.Command, args []string) error {
 
 	// 3. Deploy NNS contract.
 	cmd.Println("Stage 3: deploy NNS contract.")
-	if err := initCtx.deployNNS("deploy"); err != nil {
+	if err := initCtx.deployNNS(deployMethodName); err != nil {
 		return err
 	}
 
 	// 4. Deploy NeoFS contracts.
 	cmd.Println("Stage 4: deploy NeoFS contracts.")
-	if err := initCtx.deployContracts("deploy"); err != nil {
+	if err := initCtx.deployContracts(deployMethodName); err != nil {
 		return err
 	}
 

cmd/neofs-adm/internal/modules/morph/initialize_deploy.go

@@ -4,6 +4,7 @@ import (
 	"archive/tar"
 	"compress/gzip"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -83,7 +84,10 @@ type contractState struct {
 	Hash        util.Uint160
 }
 
-const updateMethodName = "update"
+const (
+	updateMethodName = "update"
+	deployMethodName = "deploy"
+)
 
 func (c *initializeContext) deployNNS(method string) error {
 	cs := c.getContract(nnsContract)
@@ -214,10 +218,18 @@ func (c *initializeContext) deployContracts(method string) error {
 		cs := c.Contracts[ctrName]
 
 		ctrHash := cs.Hash
+
+		methodCur := method // prevent overriding in if-block
+
 		if method == updateMethodName {
 			ctrHash, err = nnsResolveHash(c.Client, nnsHash, ctrName+".neofs")
 			if err != nil {
-				return fmt.Errorf("can't resolve hash for contract update: %w", err)
+				if errors.Is(err, errMissingNNSRecord) {
+					// if contract not found we deploy it instead of update
+					methodCur = deployMethodName
+				} else {
+					return fmt.Errorf("can't resolve hash for contract update: %w", err)
+				}
 			}
 		}
 		if c.isUpdated(ctrHash, cs) {
@@ -226,7 +238,7 @@ func (c *initializeContext) deployContracts(method string) error {
 		}
 
 		invokeHash := mgmtHash
-		if method == updateMethodName {
+		if methodCur == updateMethodName {
 			invokeHash = ctrHash
 		}
 
@@ -237,7 +249,7 @@ func (c *initializeContext) deployContracts(method string) error {
 			Scopes:  transaction.Global,
 		}
 
-		res, err := c.Client.InvokeFunction(invokeHash, method, params, []transaction.Signer{signer})
+		res, err := c.Client.InvokeFunction(invokeHash, methodCur, params, []transaction.Signer{signer})
 		if err != nil {
 			return fmt.Errorf("can't deploy %s contract: %w", ctrName, err)
 		}

cmd/neofs-adm/internal/modules/morph/initialize_nns.go

@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"strconv"
+	"strings"
 
 	nns "github.com/nspcc-dev/neo-go/examples/nft-nd-nns"
 	"github.com/nspcc-dev/neo-go/pkg/core/native"
@@ -116,6 +117,9 @@ func (c *initializeContext) nnsRootRegistered(nnsHash util.Uint160) (bool, error
 	return res.State == vm.HaltState.String(), nil
 }
 
+var errMissingNNSRecord = errors.New("missing NNS record")
+
+// Returns errMissingNNSRecord if invocation fault exception contains "token not found".
 func nnsResolveHash(c *client.Client, nnsHash util.Uint160, domain string) (util.Uint160, error) {
 	result, err := c.InvokeFunction(nnsHash, "resolve", []smartcontract.Parameter{
 		{
@@ -131,6 +135,9 @@ func nnsResolveHash(c *client.Client, nnsHash util.Uint160, domain string) (util
 		return util.Uint160{}, fmt.Errorf("`resolve`: %w", err)
 	}
 	if result.State != vm.HaltState.String() {
+		if strings.Contains(result.FaultException, "token not found") {
+			return util.Uint160{}, errMissingNNSRecord
+		}
 		return util.Uint160{}, fmt.Errorf("invocation failed: %s", result.FaultException)
 	}
 	if len(result.Stack) == 0 {