Remove unnecessary Vault dependencies from vendor

The service doesn't use Vault client anymore as now
it asks the signer service for proofs.
Also golib is updated to the latest version.

go.mod

@@ -3,8 +3,7 @@ module code.vereign.com/gaiax/tsa/infohub
 go 1.17
 
 require (
-	code.vereign.com/gaiax/tsa/golib v0.0.0-20220603082703-12e9e3c06615
-	github.com/hashicorp/vault/api v1.6.0
+	code.vereign.com/gaiax/tsa/golib v0.0.0-20220615064316-ca49265d8b0e
 	github.com/hyperledger/aries-framework-go v0.1.8
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/piprate/json-gold v0.4.1
@@ -49,6 +48,7 @@ require (
 	github.com/hashicorp/go-version v1.2.0 // indirect
 	github.com/hashicorp/golang-lru v0.5.4 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/hashicorp/vault/api v1.6.0 // indirect
 	github.com/hashicorp/vault/sdk v0.5.0 // indirect
 	github.com/hashicorp/yamux v0.0.0-20181012175058-2f1d1f20f75d // indirect
 	github.com/hyperledger/aries-framework-go/spi v0.0.0-20220322085443-50e8f9bd208b // indirect

go.sum

@@ -38,6 +38,8 @@ cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RX
 cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
 code.vereign.com/gaiax/tsa/golib v0.0.0-20220603082703-12e9e3c06615 h1:EdWAZfrfEzWiIo0iMkCcs4bPTW7gItLLgJSU5I143vI=
 code.vereign.com/gaiax/tsa/golib v0.0.0-20220603082703-12e9e3c06615/go.mod h1:bDorhOdL8/uRy56rvdBLWiRiOKlDjC5tQvpS5eN6wzo=
+code.vereign.com/gaiax/tsa/golib v0.0.0-20220615064316-ca49265d8b0e h1:Tf+6cXb+hh/EsoNLyeGJ/T+hhJMn8Hdbo43cVkeAQZ4=
+code.vereign.com/gaiax/tsa/golib v0.0.0-20220615064316-ca49265d8b0e/go.mod h1:bDorhOdL8/uRy56rvdBLWiRiOKlDjC5tQvpS5eN6wzo=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=

internal/clients/vault/client.go

-package vault
-
-import (
-	"context"
-	"encoding/base64"
-	"encoding/json"
-	"fmt"
-	"net/http"
-
-	vaultpkg "github.com/hashicorp/vault/api"
-)
-
-type Client struct {
-	keyname string
-	client  *vaultpkg.Client
-}
-
-func New(addr string, token string, keyname string) (*Client, error) {
-	cfg := vaultpkg.DefaultConfig()
-	cfg.Address = addr
-	client, err := vaultpkg.NewClient(cfg)
-	if err != nil {
-		return nil, err
-	}
-
-	client.SetToken(token)
-
-	return &Client{
-		client:  client,
-		keyname: keyname,
-	}, nil
-}
-
-func (c *Client) Sign(data []byte) ([]byte, error) {
-	body := map[string]interface{}{
-		"input": base64.StdEncoding.EncodeToString(data),
-	}
-
-	req := c.client.NewRequest(http.MethodPost, "/v1/transit/sign/"+c.keyname)
-	if err := req.SetJSONBody(body); err != nil {
-		return nil, err
-	}
-
-	// nolint:staticcheck
-	res, err := c.client.RawRequestWithContext(context.Background(), req)
-	if err != nil {
-		return nil, err
-	}
-	defer res.Body.Close()
-
-	if res.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("unexpected response from vault: %s", res.Status)
-	}
-
-	// expected response from the sign operation
-	var response struct {
-		Data struct {
-			Signature string `json:"signature"`
-		} `json:"data"`
-	}
-	if err := json.NewDecoder(res.Body).Decode(&response); err != nil {
-		return nil, err
-	}
-
-	if len(response.Data.Signature) == 0 {
-		return nil, fmt.Errorf("unexpected response: no signature")
-	}
-
-	return []byte(response.Data.Signature), nil
-}