[#83] pkg/client: Support status returns

Make all `Client` methods to return structured values and error. Parse v2
status messages in all RPC and provide status getter from all result
structures. Returns status failures as status result instead of error.

Interface changes:
  * all methods return `<method>Res` structure;
  * rename some methods to be more clear;
  * unify TZ and SHA256 objecy payload hashing in single method.

Behavior changes:
  * client doesn't verify object header structure received via Object.Head.
    If the caller was tied to verification, now it must do it explicitly.

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

client/reputation.go

@@ -2,7 +2,6 @@ package client
 
 import (
 	"context"
-	"fmt"
 
 	v2reputation "github.com/nspcc-dev/neofs-api-go/v2/reputation"
 	rpcapi "github.com/nspcc-dev/neofs-api-go/v2/rpc"
@@ -49,7 +48,9 @@ func (x *AnnounceLocalTrustPrm) SetTrusts(trusts []*reputation.Trust) {
 }
 
 // AnnounceLocalTrustRes groups results of AnnounceLocalTrust operation.
-type AnnounceLocalTrustRes struct{}
+type AnnounceLocalTrustRes struct {
+	statusRes
+}
 
 func (c *clientImpl) AnnounceLocalTrust(ctx context.Context, prm AnnounceLocalTrustPrm, opts ...CallOption) (*AnnounceLocalTrustRes, error) {
 	// apply all available options
@@ -77,17 +78,27 @@ func (c *clientImpl) AnnounceLocalTrust(ctx context.Context, prm AnnounceLocalTr
 		return nil, err
 	}
 
-	// handle response meta info
-	if err := c.handleResponseInfoV2(callOptions, resp); err != nil {
-		return nil, err
+	var (
+		res     = new(AnnounceLocalTrustRes)
+		procPrm processResponseV2Prm
+		procRes processResponseV2Res
+	)
+
+	procPrm.callOpts = callOptions
+	procPrm.resp = resp
+
+	procRes.statusRes = res
+
+	// process response in general
+	if c.processResponseV2(&procRes, procPrm) {
+		if procRes.cliErr != nil {
+			return nil, procRes.cliErr
+		}
+
+		return res, nil
 	}
 
-	err = v2signature.VerifyServiceMessage(resp)
-	if err != nil {
-		return nil, fmt.Errorf("can't verify response message: %w", err)
-	}
-
-	return new(AnnounceLocalTrustRes), nil
+	return res, nil
 }
 
 // AnnounceIntermediateTrustPrm groups parameters of AnnounceIntermediateTrust operation.
@@ -128,7 +139,9 @@ func (x *AnnounceIntermediateTrustPrm) SetTrust(trust *reputation.PeerToPeerTrus
 }
 
 // AnnounceIntermediateTrustRes groups results of AnnounceIntermediateTrust operation.
-type AnnounceIntermediateTrustRes struct{}
+type AnnounceIntermediateTrustRes struct {
+	statusRes
+}
 
 func (c *clientImpl) AnnounceIntermediateTrust(ctx context.Context, prm AnnounceIntermediateTrustPrm, opts ...CallOption) (*AnnounceIntermediateTrustRes, error) {
 	// apply all available options
@@ -157,15 +170,25 @@ func (c *clientImpl) AnnounceIntermediateTrust(ctx context.Context, prm Announce
 		return nil, err
 	}
 
-	// handle response meta info
-	if err := c.handleResponseInfoV2(callOptions, resp); err != nil {
-		return nil, err
+	var (
+		res     = new(AnnounceIntermediateTrustRes)
+		procPrm processResponseV2Prm
+		procRes processResponseV2Res
+	)
+
+	procPrm.callOpts = callOptions
+	procPrm.resp = resp
+
+	procRes.statusRes = res
+
+	// process response in general
+	if c.processResponseV2(&procRes, procPrm) {
+		if procRes.cliErr != nil {
+			return nil, procRes.cliErr
+		}
+
+		return res, nil
 	}
 
-	err = v2signature.VerifyServiceMessage(resp)
-	if err != nil {
-		return nil, fmt.Errorf("can't verify response message: %w", err)
-	}
-
-	return new(AnnounceIntermediateTrustRes), nil
+	return res, nil
 }