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Utiliser des jetons Web JSON (JWT)

JSON Web Tokens est une norme couramment utilisée dans l'industrie pour transférer des informations de manière sécurisée en tant qu'objet JSON. Lorsque vous utilisez l'API Google Wallet, vous encodez les détails de l'objet Cartes que vous souhaitez utiliser pour créer une instance de carte au format JWT (prononcé "jot"), puis envoyez ce JWT dans une requête à l'API Google Wallet.

Les jetons JWT sont sécurisés en les signant avec une clé secrète partagée avant d'être envoyés à l'API Google Wallet. Si vous utilisez l'API REST Google Wallet, la signature secrète est votre clé de compte de service Google Cloud. Si vous utilisez le SDK Google Wallet pour Android, la signature secrète est l'empreinte SHA-1 de votre application Android.

Encoder une carte dans un jeton JWT

Une fois le OfferObject créé, encapsulez-le avec un jeton JWT non signé doté de l'attribut payload.OfferObjects, comme indiqué dans l'extrait de code suivant:

JSON

{
  "iss": "OWNER_EMAIL_ADDRESS",
  "aud": "google",
  "typ": "savetowallet",
  "iat": "UNIX_TIME",
  "origins": [],
  "payload": {
      "offerObjects": [ NEW_OBJECT ]
  }
}

Pour en savoir plus sur le format attendu des jetons JWT, consultez la documentation de référence sur les jetons JWT.

Signer un jeton JWT

Web, e-mail et SMS

Le jeton JWT doit être signé à l'aide de la clé de compte de service associée au compte de service Google Cloud que vous avez autorisé dans la Business Console de Google Wallet. L'API Google Wallet validera ces revendications en vérifiant la signature JWT.

La signature du jeton JWT génère un jeton qui peut ensuite être utilisé pour créer un jeton "Ajouter à Google Wallet". permettant d'envoyer la carte à un utilisateur:

Java

Pour commencer votre intégration en Java, reportez-vous à notre <ph type="x-smartling-placeholder"></ph> exemples de code sur GitHub.

/**
 * Generate a signed JWT that creates a new pass class and object.
 *
 * <p>When the user opens the "Add to Google Wallet" URL and saves the pass to their wallet, the
 * pass class and object defined in the JWT are created. This allows you to create multiple pass
 * classes and objects in one API call when the user saves the pass to their wallet.
 *
 * @param issuerId The issuer ID being used for this request.
 * @param classSuffix Developer-defined unique ID for this pass class.
 * @param objectSuffix Developer-defined unique ID for the pass object.
 * @return An "Add to Google Wallet" link.
 */
public String createJWTNewObjects(String issuerId, String classSuffix, String objectSuffix) {
  // See link below for more information on required properties
  // https://developers.google.com/wallet/retail/offers/rest/v1/offerclass
  OfferClass newClass =
      new OfferClass()
          .setId(String.format("%s.%s", issuerId, classSuffix))
          .setIssuerName("Issuer name")
          .setReviewStatus("UNDER_REVIEW")
          .setProvider("Provider name")
          .setTitle("Offer title")
          .setRedemptionChannel("ONLINE");

  // See link below for more information on required properties
  // https://developers.google.com/wallet/retail/offers/rest/v1/offerobject
  OfferObject newObject =
      new OfferObject()
          .setId(String.format("%s.%s", issuerId, objectSuffix))
          .setClassId(String.format("%s.%s", issuerId, classSuffix))
          .setState("ACTIVE")
          .setHeroImage(
              new Image()
                  .setSourceUri(
                      new ImageUri()
                          .setUri(
                              "https://farm4.staticflickr.com/3723/11177041115_6e6a3b6f49_o.jpg"))
                  .setContentDescription(
                      new LocalizedString()
                          .setDefaultValue(
                              new TranslatedString()
                                  .setLanguage("en-US")
                                  .setValue("Hero image description"))))
          .setTextModulesData(
                  List.of(
                          new TextModuleData()
                                  .setHeader("Text module header")
                                  .setBody("Text module body")
                                  .setId("TEXT_MODULE_ID")))
          .setLinksModuleData(
              new LinksModuleData()
                  .setUris(
                      Arrays.asList(
                          new Uri()
                              .setUri("http://maps.google.com/")
                              .setDescription("Link module URI description")
                              .setId("LINK_MODULE_URI_ID"),
                          new Uri()
                              .setUri("tel:6505555555")
                              .setDescription("Link module tel description")
                              .setId("LINK_MODULE_TEL_ID"))))
          .setImageModulesData(
                  List.of(
                          new ImageModuleData()
                                  .setMainImage(
                                          new Image()
                                                  .setSourceUri(
                                                          new ImageUri()
                                                                  .setUri(
                                                                          "http://farm4.staticflickr.com/3738/12440799783_3dc3c20606_b.jpg"))
                                                  .setContentDescription(
                                                          new LocalizedString()
                                                                  .setDefaultValue(
                                                                          new TranslatedString()
                                                                                  .setLanguage("en-US")
                                                                                  .setValue("Image module description"))))
                                  .setId("IMAGE_MODULE_ID")))
          .setBarcode(new Barcode().setType("QR_CODE").setValue("QR code value"))
          .setLocations(
                  List.of(
                          new LatLongPoint()
                                  .setLatitude(37.424015499999996)
                                  .setLongitude(-122.09259560000001)))
          .setValidTimeInterval(
              new TimeInterval()
                  .setStart(new DateTime().setDate("2023-06-12T23:20:50.52Z"))
                  .setEnd(new DateTime().setDate("2023-12-12T23:20:50.52Z")));

  // Create the JWT as a HashMap object
  HashMap<String, Object> claims = new HashMap<String, Object>();
  claims.put("iss", ((ServiceAccountCredentials) credentials).getClientEmail());
  claims.put("aud", "google");
  claims.put("origins", List.of("www.example.com"));
  claims.put("typ", "savetowallet");

  // Create the Google Wallet payload and add to the JWT
  HashMap<String, Object> payload = new HashMap<String, Object>();
  payload.put("offerClasses", List.of(newClass));
  payload.put("offerObjects", List.of(newObject));
  claims.put("payload", payload);

  // The service account credentials are used to sign the JWT
  Algorithm algorithm =
      Algorithm.RSA256(
          null, (RSAPrivateKey) ((ServiceAccountCredentials) credentials).getPrivateKey());
  String token = JWT.create().withPayload(claims).sign(algorithm);

  System.out.println("Add to Google Wallet link");
  System.out.printf("https://pay.google.com/gp/v/save/%s%n", token);

  return String.format("https://pay.google.com/gp/v/save/%s", token);
}

PHP

Pour commencer l'intégration en PHP, reportez-vous à notre <ph type="x-smartling-placeholder"></ph> exemples de code sur GitHub.

/**
 * Generate a signed JWT that creates a new pass class and object.
 *
 * When the user opens the "Add to Google Wallet" URL and saves the pass to
 * their wallet, the pass class and object defined in the JWT are
 * created. This allows you to create multiple pass classes and objects in
 * one API call when the user saves the pass to their wallet.
 *
 * @param string $issuerId The issuer ID being used for this request.
 * @param string $classSuffix Developer-defined unique ID for the pass class.
 * @param string $objectSuffix Developer-defined unique ID for the pass object.
 *
 * @return string An "Add to Google Wallet" link.
 */
public function createJwtNewObjects(string $issuerId, string $classSuffix, string $objectSuffix)
{
  // See link below for more information on required properties
  // https://developers.google.com/wallet/retail/offers/rest/v1/offerclass
  $newClass = new OfferClass([
    'id' => "{$issuerId}.{$classSuffix}",
    'issuerName' => 'Issuer name',
    'reviewStatus' => 'UNDER_REVIEW',
    'provider' => 'Provider name',
    'title' => 'Offer title',
    'redemptionChannel' => 'ONLINE'
  ]);

  // See link below for more information on required properties
  // https://developers.google.com/wallet/retail/offers/rest/v1/offerobject
  $newObject = new OfferObject([
    'id' => "{$issuerId}.{$objectSuffix}",
    'classId' => "{$issuerId}.{$classSuffix}",
    'state' => 'ACTIVE',
    'heroImage' => new Image([
      'sourceUri' => new ImageUri([
        'uri' => 'https://farm4.staticflickr.com/3723/11177041115_6e6a3b6f49_o.jpg'
      ]),
      'contentDescription' => new LocalizedString([
        'defaultValue' => new TranslatedString([
          'language' => 'en-US',
          'value' => 'Hero image description'
        ])
      ])
    ]),
    'textModulesData' => [
      new TextModuleData([
        'header' => 'Text module header',
        'body' => 'Text module body',
        'id' => 'TEXT_MODULE_ID'
      ])
    ],
    'linksModuleData' => new LinksModuleData([
      'uris' => [
        new Uri([
          'uri' => 'http://maps.google.com/',
          'description' => 'Link module URI description',
          'id' => 'LINK_MODULE_URI_ID'
        ]),
        new Uri([
          'uri' => 'tel:6505555555',
          'description' => 'Link module tel description',
          'id' => 'LINK_MODULE_TEL_ID'
        ])
      ]
    ]),
    'imageModulesData' => [
      new ImageModuleData([
        'mainImage' => new Image([
          'sourceUri' => new ImageUri([
            'uri' => 'http://farm4.staticflickr.com/3738/12440799783_3dc3c20606_b.jpg'
          ]),
          'contentDescription' => new LocalizedString([
            'defaultValue' => new TranslatedString([
              'language' => 'en-US',
              'value' => 'Image module description'
            ])
          ])
        ]),
        'id' => 'IMAGE_MODULE_ID'
      ])
    ],
    'barcode' => new Barcode([
      'type' => 'QR_CODE',
      'value' => 'QR code value'
    ]),
    'locations' => [
      new LatLongPoint([
        'latitude' => 37.424015499999996,
        'longitude' =>  -122.09259560000001
      ])
    ],
    'validTimeInterval' => new TimeInterval([
      'start' => new DateTime([
        'date' => '2023-06-12T23:20:50.52Z'
      ]),
      'end' => new DateTime([
        'date' => '2023-12-12T23:20:50.52Z'
      ])
    ])
  ]);

  // The service account credentials are used to sign the JWT
  $serviceAccount = json_decode(file_get_contents($this->keyFilePath), true);

  // Create the JWT as an array of key/value pairs
  $claims = [
    'iss' => $serviceAccount['client_email'],
    'aud' => 'google',
    'origins' => ['www.example.com'],
    'typ' => 'savetowallet',
    'payload' => [
      'offerClasses' => [
        $newClass
      ],
      'offerObjects' => [
        $newObject
      ]
    ]
  ];

  $token = JWT::encode(
    $claims,
    $serviceAccount['private_key'],
    'RS256'
  );

  print "Add to Google Wallet link\n";
  print "https://pay.google.com/gp/v/save/{$token}";

  return "https://pay.google.com/gp/v/save/{$token}";
}

Python

Pour commencer l'intégration dans Python, reportez-vous à notre <ph type="x-smartling-placeholder"></ph> exemples de code sur GitHub.

def create_jwt_new_objects(self, issuer_id: str, class_suffix: str,
                           object_suffix: str) -> str:
    """Generate a signed JWT that creates a new pass class and object.

    When the user opens the "Add to Google Wallet" URL and saves the pass to
    their wallet, the pass class and object defined in the JWT are
    created. This allows you to create multiple pass classes and objects in
    one API call when the user saves the pass to their wallet.

    Args:
        issuer_id (str): The issuer ID being used for this request.
        class_suffix (str): Developer-defined unique ID for the pass class.
        object_suffix (str): Developer-defined unique ID for the pass object.

    Returns:
        An "Add to Google Wallet" link.
    """

    # See link below for more information on required properties
    # https://developers.google.com/wallet/retail/offers/rest/v1/offerclass
    new_class = {
        'id': f'{issuer_id}.{class_suffix}',
        'issuerName': 'Issuer name',
        'reviewStatus': 'UNDER_REVIEW',
        'provider': 'Provider name',
        'title': 'Offer title',
        'redemptionChannel': 'ONLINE'
    }

    # See link below for more information on required properties
    # https://developers.google.com/wallet/retail/offers/rest/v1/offerobject
    new_object = {
        'id': f'{issuer_id}.{object_suffix}',
        'classId': f'{issuer_id}.{class_suffix}',
        'state': 'ACTIVE',
        'heroImage': {
            'sourceUri': {
                'uri':
                    'https://farm4.staticflickr.com/3723/11177041115_6e6a3b6f49_o.jpg'
            },
            'contentDescription': {
                'defaultValue': {
                    'language': 'en-US',
                    'value': 'Hero image description'
                }
            }
        },
        'textModulesData': [{
            'header': 'Text module header',
            'body': 'Text module body',
            'id': 'TEXT_MODULE_ID'
        }],
        'linksModuleData': {
            'uris': [{
                'uri': 'http://maps.google.com/',
                'description': 'Link module URI description',
                'id': 'LINK_MODULE_URI_ID'
            }, {
                'uri': 'tel:6505555555',
                'description': 'Link module tel description',
                'id': 'LINK_MODULE_TEL_ID'
            }]
        },
        'imageModulesData': [{
            'mainImage': {
                'sourceUri': {
                    'uri':
                        'http://farm4.staticflickr.com/3738/12440799783_3dc3c20606_b.jpg'
                },
                'contentDescription': {
                    'defaultValue': {
                        'language': 'en-US',
                        'value': 'Image module description'
                    }
                }
            },
            'id': 'IMAGE_MODULE_ID'
        }],
        'barcode': {
            'type': 'QR_CODE',
            'value': 'QR code'
        },
        'locations': [{
            'latitude': 37.424015499999996,
            'longitude': -122.09259560000001
        }],
        'validTimeInterval': {
            'start': {
                'date': '2023-06-12T23:20:50.52Z'
            },
            'end': {
                'date': '2023-12-12T23:20:50.52Z'
            }
        }
    }

    # Create the JWT claims
    claims = {
        'iss': self.credentials.service_account_email,
        'aud': 'google',
        'origins': ['www.example.com'],
        'typ': 'savetowallet',
        'payload': {
            # The listed classes and objects will be created
            'offerClasses': [new_class],
            'offerObjects': [new_object]
        }
    }

    # The service account credentials are used to sign the JWT
    signer = crypt.RSASigner.from_service_account_file(self.key_file_path)
    token = jwt.encode(signer, claims).decode('utf-8')

    print('Add to Google Wallet link')
    print(f'https://pay.google.com/gp/v/save/{token}')

    return f'https://pay.google.com/gp/v/save/{token}'

C#

Pour commencer votre intégration en C#, consultez notre <ph type="x-smartling-placeholder"></ph> exemples de code sur GitHub.

/// <summary>
/// Generate a signed JWT that creates a new pass class and object.
/// <para />
/// When the user opens the "Add to Google Wallet" URL and saves the pass to
/// their wallet, the pass class and object defined in the JWT are created.
/// This allows you to create multiple pass classes and objects in one API
/// call when the user saves the pass to their wallet.
/// <para />
/// The Google Wallet C# library uses Newtonsoft.Json.JsonPropertyAttribute
/// to specify the property names when converting objects to JSON. The
/// Newtonsoft.Json.JsonConvert.SerializeObject method will automatically
/// serialize the object with the right property names.
/// </summary>
/// <param name="issuerId">The issuer ID being used for this request.</param>
/// <param name="classSuffix">Developer-defined unique ID for this pass class.</param>
/// <param name="objectSuffix">Developer-defined unique ID for the pass object.</param>
/// <returns>An "Add to Google Wallet" link.</returns>
public string CreateJWTNewObjects(string issuerId, string classSuffix, string objectSuffix)
{
  // Ignore null values when serializing to/from JSON
  JsonSerializerSettings excludeNulls = new JsonSerializerSettings()
  {
    NullValueHandling = NullValueHandling.Ignore
  };

  // See link below for more information on required properties
  // https://developers.google.com/wallet/retail/offers/rest/v1/offerclass
  OfferClass newClass = new OfferClass
  {
    Id = $"{issuerId}.{classSuffix}",
    IssuerName = "Issuer name",
    ReviewStatus = "UNDER_REVIEW",
    Provider = "Provider name",
    Title = "Offer title",
    RedemptionChannel = "ONLINE"
  };

  // See link below for more information on required properties
  // https://developers.google.com/wallet/retail/offers/rest/v1/offerobject
  OfferObject newObject = new OfferObject
  {
    Id = $"{issuerId}.{objectSuffix}",
    ClassId = $"{issuerId}.{classSuffix}",
    State = "ACTIVE",
    HeroImage = new Image
    {
      SourceUri = new ImageUri
      {
        Uri = "https://farm4.staticflickr.com/3723/11177041115_6e6a3b6f49_o.jpg"
      },
      ContentDescription = new LocalizedString
      {
        DefaultValue = new TranslatedString
        {
          Language = "en-US",
          Value = "Hero image description"
        }
      }
    },
    TextModulesData = new List<TextModuleData>
    {
      new TextModuleData
      {
        Header = "Text module header",
        Body = "Text module body",
        Id = "TEXT_MODULE_ID"
      }
    },
    LinksModuleData = new LinksModuleData
    {
      Uris = new List<Google.Apis.Walletobjects.v1.Data.Uri>
      {
        new Google.Apis.Walletobjects.v1.Data.Uri
        {
          UriValue = "http://maps.google.com/",
          Description = "Link module URI description",
          Id = "LINK_MODULE_URI_ID"
        },
        new Google.Apis.Walletobjects.v1.Data.Uri
        {
          UriValue = "tel:6505555555",
          Description = "Link module tel description",
          Id = "LINK_MODULE_TEL_ID"
        }
      }
    },
    ImageModulesData = new List<ImageModuleData>
    {
      new ImageModuleData
      {
        MainImage = new Image
        {
          SourceUri = new ImageUri
          {
            Uri = "http://farm4.staticflickr.com/3738/12440799783_3dc3c20606_b.jpg"
          },
          ContentDescription = new LocalizedString
          {
            DefaultValue = new TranslatedString
            {
              Language = "en-US",
              Value = "Image module description"
            }
          }
        },
        Id = "IMAGE_MODULE_ID"
      }
    },
    Barcode = new Barcode
    {
      Type = "QR_CODE",
      Value = "QR code"
    },
    Locations = new List<LatLongPoint>
    {
      new LatLongPoint
      {
        Latitude = 37.424015499999996,
        Longitude = -122.09259560000001
      }
    },
    ValidTimeInterval = new TimeInterval
    {
      Start = new Google.Apis.Walletobjects.v1.Data.DateTime
      {
        Date = "2023-06-12T23:20:50.52Z"
      },
      End = new Google.Apis.Walletobjects.v1.Data.DateTime
      {
        Date = "2023-12-12T23:20:50.52Z"
      }
    }
  };

  // Create JSON representations of the class and object
  JObject serializedClass = JObject.Parse(
      JsonConvert.SerializeObject(newClass, excludeNulls));
  JObject serializedObject = JObject.Parse(
      JsonConvert.SerializeObject(newObject, excludeNulls));

  // Create the JWT as a JSON object
  JObject jwtPayload = JObject.Parse(JsonConvert.SerializeObject(new
  {
    iss = credentials.Id,
    aud = "google",
    origins = new List<string>
    {
      "www.example.com"
    },
    typ = "savetowallet",
    payload = JObject.Parse(JsonConvert.SerializeObject(new
    {
      // The listed classes and objects will be created
      // when the user saves the pass to their wallet
      offerClasses = new List<JObject>
      {
        serializedClass
      },
      offerObjects = new List<JObject>
      {
        serializedObject
      }
    }))
  }));

  // Deserialize into a JwtPayload
  JwtPayload claims = JwtPayload.Deserialize(jwtPayload.ToString());

  // The service account credentials are used to sign the JWT
  RsaSecurityKey key = new RsaSecurityKey(credentials.Key);
  SigningCredentials signingCredentials = new SigningCredentials(
      key, SecurityAlgorithms.RsaSha256);
  JwtSecurityToken jwt = new JwtSecurityToken(
      new JwtHeader(signingCredentials), claims);
  string token = new JwtSecurityTokenHandler().WriteToken(jwt);

  Console.WriteLine("Add to Google Wallet link");
  Console.WriteLine($"https://pay.google.com/gp/v/save/{token}");

  return $"https://pay.google.com/gp/v/save/{token}";
}

Node.js

Pour commencer votre intégration dans Node, reportez-vous à notre <ph type="x-smartling-placeholder"></ph> exemples de code sur GitHub.

/**
 * Generate a signed JWT that creates a new pass class and object.
 *
 * When the user opens the "Add to Google Wallet" URL and saves the pass to
 * their wallet, the pass class and object defined in the JWT are
 * created. This allows you to create multiple pass classes and objects in
 * one API call when the user saves the pass to their wallet.
 *
 * @param {string} issuerId The issuer ID being used for this request.
 * @param {string} classSuffix Developer-defined unique ID for the pass class.
 * @param {string} objectSuffix Developer-defined unique ID for the pass object.
 *
 * @returns {string} An "Add to Google Wallet" link.
 */
createJwtNewObjects(issuerId, classSuffix, objectSuffix) {
  // See link below for more information on required properties
  // https://developers.google.com/wallet/retail/offers/rest/v1/offerclass
  let newClass = {
    'id': `${issuerId}.${classSuffix}`,
    'issuerName': 'Issuer name',
    'reviewStatus': 'UNDER_REVIEW',
    'provider': 'Provider name',
    'title': 'Offer title',
    'redemptionChannel': 'ONLINE',
  };

  // See link below for more information on required properties
  // https://developers.google.com/wallet/retail/offers/rest/v1/offerobject
  let newObject = {
    'id': `${issuerId}.${objectSuffix}`,
    'classId': `${issuerId}.${classSuffix}`,
    'state': 'ACTIVE',
    'heroImage': {
      'sourceUri': {
        'uri': 'https://farm4.staticflickr.com/3723/11177041115_6e6a3b6f49_o.jpg'
      },
      'contentDescription': {
        'defaultValue': {
          'language': 'en-US',
          'value': 'Hero image description'
        }
      }
    },
    'textModulesData': [
      {
        'header': 'Text module header',
        'body': 'Text module body',
        'id': 'TEXT_MODULE_ID'
      }
    ],
    'linksModuleData': {
      'uris': [
        {
          'uri': 'http://maps.google.com/',
          'description': 'Link module URI description',
          'id': 'LINK_MODULE_URI_ID'
        },
        {
          'uri': 'tel:6505555555',
          'description': 'Link module tel description',
          'id': 'LINK_MODULE_TEL_ID'
        }
      ]
    },
    'imageModulesData': [
      {
        'mainImage': {
          'sourceUri': {
            'uri': 'http://farm4.staticflickr.com/3738/12440799783_3dc3c20606_b.jpg'
          },
          'contentDescription': {
            'defaultValue': {
              'language': 'en-US',
              'value': 'Image module description'
            }
          }
        },
        'id': 'IMAGE_MODULE_ID'
      }
    ],
    'barcode': {
      'type': 'QR_CODE',
      'value': 'QR code'
    },
    'locations': [
      {
        'latitude': 37.424015499999996,
        'longitude': -122.09259560000001
      }
    ],
    'validTimeInterval': {
      'start': {
        'date': '2023-06-12T23:20:50.52Z'
      },
      'end': {
        'date': '2023-12-12T23:20:50.52Z'
      }
    }
  };

  // Create the JWT claims
  let claims = {
    iss: this.credentials.client_email,
    aud: 'google',
    origins: ['www.example.com'],
    typ: 'savetowallet',
    payload: {
      // The listed classes and objects will be created
      offerClasses: [newClass],
      offerObjects: [newObject]
    }
  };

  // The service account credentials are used to sign the JWT
  let token = jwt.sign(claims, this.credentials.private_key, { algorithm: 'RS256' });

  console.log('Add to Google Wallet link');
  console.log(`https://pay.google.com/gp/v/save/${token}`);

  return `https://pay.google.com/gp/v/save/${token}`;
}

Go

Pour commencer votre intégration dans Go, consultez nos exemples de code complets sur GitHub. <ph type="x-smartling-placeholder"></ph> exemples de code sur GitHub.

// Generate a signed JWT that creates a new pass class and object.
//
// When the user opens the "Add to Google Wallet" URL and saves the pass to
// their wallet, the pass class and object defined in the JWT are
// created. This allows you to create multiple pass classes and objects in
// one API call when the user saves the pass to their wallet.
func (d *demoOffer) createJwtNewObjects(issuerId, classSuffix, objectSuffix string) {
	offerObject := new(walletobjects.OfferObject)
	offerObject.Id = fmt.Sprintf("%s.%s", issuerId, objectSuffix)
	offerObject.ClassId = fmt.Sprintf("%s.%s", issuerId, classSuffix)
	offerObject.State = "ACTIVE"

	offerJson, _ := json.Marshal(offerObject)
	var payload map[string]any
	json.Unmarshal([]byte(fmt.Sprintf(`
	{
		"offerObjects": [%s]
	}
	`, offerJson)), &payload)
	claims := jwt.MapClaims{
		"iss":     d.credentials.Email,
		"aud":     "google",
		"origins": []string{"www.example.com"},
		"typ":     "savetowallet",
		"payload": payload,
	}

	// The service account credentials are used to sign the JWT
	key, _ := jwt.ParseRSAPrivateKeyFromPEM(d.credentials.PrivateKey)
	token, _ := jwt.NewWithClaims(jwt.SigningMethodRS256, claims).SignedString(key)

	fmt.Println("Add to Google Wallet link")
	fmt.Println("https://pay.google.com/gp/v/save/" + token)
}

Applications Android

Lorsque la méthode savePasses est appelée pour émettre une carte à un utilisateur, le SDK Google Wallet pour Android signe automatiquement votre JWT avec l'empreinte SHA-1 de la clé de signature d'application que vous avez fournie dans la Business Console de Google Wallet. Vous pouvez également émettre la carte à l'aide d'un jeton JWT précédemment signé à l'aide de la méthode savePassesJwt du SDK Android.

Pour en savoir plus, consultez Émettre des cartes avec le SDK Android.