Android SDK
3 1 android sdk 3 1 1 introduction the samsung pay sdk allows android-based partner apps—such as merchant apps and issuer banking apps—to securely integrate features of integration wallet, enabling in-app payments, push provisioning, and more the following major operations are supported in-app payment - gives customers the option of paying for products and services with samsung wallet push provisioning - allows customers add a bank card to samsung wallet from the issuer app by providing the required card details to integrate your partner application with the samsung pay sdk, the following components are included your sdk download samsungpay jar - contains classes and interfaces of the samsung pay sdk which need to be integrated to partner apps javadoc - provides descriptions of the apis included in the samsung pay sdk, along with sample code showing how to use them sample merchant app and sample issuer app showing how samsung pay apis can be coded in a finished android project all major operations of samsung pay sdk are implemented for demonstration purposes 3 1 2 samsung pay sdk architecture the following diagram shows a high-level architecture revealing the general interactions between the samsung pay sdk and a partner app viewed at this level, the partner apps leverage the samsung pay sdk to perform the operations shown ― push provisioning and opening favorite cards for issuers; online payments for merchants ― with samsung pay the key components involved are partner app - merchant- or issuer-developed app for making online/offline payments and provisioning payment cards through samsung wallet samsung pay sdk - sdk integrated into the partner app for direct communication with samsung wallet samsung wallet app - wallet app that the samsung pay sdk communicates with financial network - comprises the payment gateways, acquirers, card associations, and issuers that participate in transaction processing under agreement with the merchant the main classes comprising the samsung pay sdk include samsungpay – used by the partner app to get the samsung pay sdk information and the status of samsung wallet app on the device paymentmanager – provides payment/transaction functionality cardmanager – manages card list get, add, update functionality watchmanager – manages all functions related to samsung pay watch cardinfolistener – interface for requestcardinfo result from samsung wallet customsheettransactioninfolistener – interface for transaction success/failure callbacks from samsung wallet 3 1 3 uses cases in-app payment the most common in-app online payment use case take the following form merchant app presents user with the option of making payment with samsung wallet upon the user selecting the samsung pay option, the merchant app calls the apis included in the samsung pay sdk to initiate a transaction with samsung wallet app samsung wallet app responds with the tokenized payment information necessary to complete the transaction merchant app forwards this payment information to the designated payment gateway pg , either directly through the merchant's web server, or indirectly via the samsung-pg interface server for normal transaction processing app-to-app push provisioning the push provisioning use case ― adding payment cards to samsung wallet from the card issuer’s app ― typically takes this form the user logs into the issuer app the issuer app checks if samsung wallet is activated on the device and ready to use if it is in the ready status, the issuer app displays an add button for cards not currently registered/enrolled with the samsung wallet app if the add card option is selected, the issuer app calls an api to push the proper payload data to samsung wallet while the card is being provisioned, samsung wallet stays in background 3 1 4 setting up sdk development environment the importance of maintaining a good development environment cannot be overstated for integrating the samsung pay sdk with your partner app, the following prerequisites and recommendations help ensure a successful sdk implementation system requirements the samsung pay sdk is designed exclusively for samsung mobile devices supporting samsung pay and running android lollipop 5 1 android api level 22 or later versions of the android os the sdk’s in-app payments functionality requires android 6 0 m android api level 23 or later versions of the android os note as of sdk version 1 5, if the device runs android lollipop 5 1 android api level 22 or an earlier version, the getsamsungpaystatus api method returns a spay_not supported status code merchant apps still using samsung pay sdk 1 4 or earlier not recommended must check the android version running their app use the following snippet to determine the os version running on a device and whether or not to display the samsung pay button in your partner app import android os build; // in-app payment supported on android m or above // check android version of the device if build version sdk_int < build version_codes m { //hide samsung pay button} service registration to develop a samsung pay sdk service, merchants and issuers need to register for an account with samsung pay developers in order to create the appropriate service type for their applications here are some helpful links inside the portal become a member https //pay samsung com/developers/tour/memberguide create services https //pay samsung com/developers/tour/svcguide register apps https //pay samsung com/developers/tour/appsguide manage services and apps https //pay samsung com/developers/tour/svcnappsguide add samsung pay sdk to your project be sure to do the following before attempting to use the sdk if not already part of your environment, download and install an ide android studio is recommended download the samsung pay sdk the sdk package has the following directory structure folder contents docs javadoc – api reference documentation libs samsungpay jar sdk java archive file – contains the samsung pay apis to be used by your partner app samples sample apps configure your ide to integrate the samsung pay sdk with your partner app a add samsungpay jar to the libs folder of your android project b go to gradle scripts > build gradle and enter the following dependency dependencies { compile files 'libs/samsungpay jar' } c import the sdk package into your code import com samsung android sdk samsungpay v2; d proguard rules - if your app s have any issue with proguard, the following rules are recommended to enter in debug mode dontwarn com samsung android sdk samsungpay ** -keep class com samsung android sdk ** { *; } -keep interface com samsung android sdk ** { *; } -keepresourcexmlelements manifest/application/meta-data@name=spay_sdk_api_level -keepresourcexmlelements manifest/application/meta-data@name=debug_mode -keepresourcexmlelements manifest/application/meta-data@name=spay_debug_api_key dontwarn com samsung android sdk samsungpay ** -keep class com samsung android sdk ** { *; } -keep interface com samsung android sdk ** { *; } -keepresourcexmlelements manifest/application/meta-data@name=spay_sdk_api_level -keepresourcexmlelements manifest/application/meta-data@name=debug_mode -keepresourcexmlelements manifest/application/meta-data@name=spay_debug_api_key e when dexguard is employed, the following additional rules apply -keepresourcexmlelements manifest/application/meta-data@name=spay_sdk_api_level android r os targetsdkversion 30 informationfrom android r os if the target sdk version is 30 , you must include the following <queries> element in the androidmanifest <?xml version="1 0" encoding="utf-8"?> <manifest xmlns android="http //schemas android com/apk/res/android" xmlns tools="http //schemas android com/tools" package="xxx xxx xxx xxx"> <queries> <package android name="com samsung android spay" /> <package android name="com samsung android samsungpay gear" /> </queries> 3 1 5 configuring api level api level attributes as of sdk version 1 4, enhanced version control management has been introduced to improve backward compatibility and handle api dependency from country and service type for example, if a partner integrates the latest sdk―for instance, api level 2 22―but continues to use apis based in level 1 4, the partner app remains compatible with samsung wallet apps supporting api level 1 4 without the necessity of upgrading the samsung pay app the chief characteristics and properties of the api level include every api starting from version 1 4 has an api level assigned based on the sdk version number in which it is introduced the sdk’s javadoc reference can be filtered by api level so you can determine the minimum api level you need to configure in the metadata section of your app’s androidmanifest file the earliest possible version is 1 4 this lets you use the api level defined in your androidmanifest without having to trigger an upgrade of the samsung wallet app on the user’s device implement the following usage in your androidmanifest <application <meta-data android name="spay_sdk_api_level" android value="2 22" /> // most recent sdk version is recommended to leverage the latest apis but it need to be set to 2 17 for russia </application> partner app verification in partner verification process samsung pay sdk verify your registered app, version in samsung pay portal and service it also determines device and app compatibility your app needs to verify the presence of the samsung wallet app on the device, its status, and whether or not its version is sufficient to support your implementation of the sdk 3 1 6 common terminology terminology description aavs automatic add value service aidl android interface definition language for communication merchant a business entity engaged in retail e-commerce that provides an online checkout service for purchasing its products and/or services to registered end users issuer financial institution empowered to issue credit and/or debit payment cards to qualified consumers and businesses payment gateway pg e-commerce app service provider equipped to authorize credit card payments for e-businesses, online retailers, bricks and clicks, or traditional brick and mortar payment token secure method for payment ensuring that a cardholder’s information is not exploited by unauthorized parties samsung pay samsung’s proprietary mobile wallet app and payment system samsung pay service the server and service components of samsung pay samsung pay watch samsung pay app on samsung galaxy watches to support payment system eligibility check a query by third-party apps to check whether or not samsung pay is supported/activated/ready-to-use on a samsung device mst magnetic secure transmission tui trusted user interface 3 1 7 api common flow once setup is complete, you’re ready to add the sdk code within your partner app for calling the sdk’s apis and receiving callbacks when a partner app calls one of the sdk’s apis, the following interaction flow is processed to check whether the caller is authenticated and authorized before responding to the request the steps of the interaction are enumerated below step 1 the partner app calls a samsung pay sdk api the partner app initiates a call to the samsung pay sdk this could be to request in-app payment push provisioning status checks, etc step 2 sdk validates the preconditions the sdk performs initial checks before proceeding is samsung wallet installed on the device? is the integrity of the samsung pay system intact e g , no tampering or missing files ? step 3 sdk initiates communication with samsung wallet if preconditions are met, the sdk uses aidl android interface definition language to securely open a communication channel with the samsung wallet app step 4 samsung wallet app status validation samsung wallet app checks has the samsung pay setup been completed on the device? does the app require a mandatory update? is the samsung pay sdk api level used by the partner app compatible? step 5 partner app eligibility verification sdk triggers a backend verification with the samsung pay server to confirm the app’s package name, service id, and csr match what’s registered on the samsung pay developers portal the app is authorized to use the requested samsung pay functionality step 6 samsung wallet responds to sdk based on the above validations samsung wallet responds via aidl to the sdk it sends status codes, eligibility results, or additional prompts if needed e g , update required step 7 sdk triggers callback in the partner app the sdk invokes a callback function in the partner app this informs the app whether it can proceed with payment/provisioning an error or restriction has occurred step 8 partner app executes business logic based on sdk callback if successful initiate samsung pay payment ui or push provisioning complete transaction or card enrollment via the wallet app if unsuccessful inform the user offer fallback payment options provide guidance on enabling/updating samsung wallet 3 1 8 checking samsung pay status the first step in integrating the samsung pay sdk into your partner app is to create a samsung pay instance and check the status of samsung pay on the user's device this check determines whether the device supports samsung pay and if the samsung pay button should be shown as a payment or provisioning option the samsung pay button serves two key purposes for merchant apps, it enables users to select samsung pay for in-app payments for issuer apps, it allows users to add a card directly to samsung pay via push provisioning setting partnerinfo for verification before checking the status, the partner app must configure and pass a valid partnerinfo object to the samsungpay instance this is essential for verifying the calling app and enabling further sdk functionality the partnerinfo must include serviceid sid a unique identifier assigned by the samsung pay developer portal servicetype defines the type of service e g , merchant or issuer this value is also assigned during service registration samsung pay uses partnerinfo for validating the app’s identity and registration performing sdk version and api compatibility checks verifying allowlist/blocklist status note servicetype is required without it, you cannot call other samsung pay apis once partnerinfo is set correctly, you can proceed to call getsamsungpaystatus to check if samsung pay is available and ready for use on the device val serviceid = "partner_app_service_id" val bundle = bundle bundle putstring samsungpay partner_service_type, samsungpay servicetype inapp_payment tostring val partnerinfo = partnerinfo serviceid, bundle after setting partnerinfo, your partner app can now call getsamsungpaystatus this method of the samsungpay class must be called before using any other feature in the samsung pay sdk noteif you want to get the status of samsung pay watch, you have to use the watchmanager class instead of the samsungpay class fun getsamsungpaystatus callback statuslistener copy the result is delivered to statuslistener and provides the following events onsuccess ‒ called when the requested operation is successful it provides the status of the request, as well as extra bundle data related to the request onfail ‒ called when the request operation fails it returns the error code and extra bundle data related to the request the samsung pay status code returned is one of the following spay_not_supported - indicates samsung wallet is not supported on this device; typically returned if the device is incompatible with samsung pay or if the samsung wallet app is not installed spay_not_ready - indicates samsung wallet is not completely activated; usually returned if the user did not complete a mandatory update or if the user has not signed in with a valid samsung account in which case, the partner app can activate or update the samsung wallet app on the device according to the 'extra_error_reason' bundle keys below error_spay_setup_not_complete - tells the partner app to display a popup message asking if the user wishes to activate samsung pay if the user agrees, the partner app calls activatesamsungpay to activate the samsung wallet app error_spay_app_need_to_update - tells the partner app to display a popup message asking if the user wishes to update samsung pay if user agrees, the partner app calls gotoupdatepage to open the app update page error_partner_info_invalid - indicates that partner app information is invalid; typically, the partner app is using a sdk version that is not allowed, an invalid service type, or the wrong api level error_partner_sdk_api_level - tells the partner app it is using the wrong api level to resolve the error condition, the partner app must set a valid api level error_partner_service_type - tells the partner app that it did not set a service type, or that the service type it did set is invalid service type is set in partnerinfo spay_ready - indicates that samsung pay is activated and ready to use; typically returned after the user completes all mandatory updates and signs in extra bundle data can have the following values extra_country_code - for both onsuccess and onfail , this is the current device’s country code iso 3166-1 alpha-2 set by samsung pay if the partner app is not supported in this particular country, the partner app can decide not to display samsung pay button extra_error_reason - for onfailure , this is the reason for failure set by samsung pay when the returned status code is spay_ready, the partner app can safely display the samsung pay button for user selection as a payment option, push provisioning, and so on the following sample code shows how to use the getsamsungpaystatus api method val serviceid = "partner_app_service_id" val bundle = bundle bundle putstring samsungpay partner_service_type, samsungpay servicetype inapp_payment tostring val partnerinfo = partnerinfo serviceid, bundle val samsungpay = samsungpay context, partnerinfo /* * method to get the samsung pay status on the device * partner issuers, merchants applications must call this method to * check the current status of samsung pay before doing any operation */ samsungpay getsamsungpaystatus object statuslistener { override fun onsuccess status int, bundle bundle { when status { samsungpay spay_not_supported -> // samsung pay is not supported samsungpaybutton setvisibility view invisible samsungpay spay_not_ready -> { // activate samsung pay or update samsung pay, if needed samsungpaybutton setvisibility view invisible val errorreason = bundle getint samsungpay extra_error_reason if errorreason == samsungpay error_setup_not_completed { // display an appropriate popup message to the user samsungpay activatesamsungpay } else if errorreason == samsungpay error_spay_app_need_to_update { // display an appropriate popup message to the user samsungpay gotoupdatepage } else { toast maketext context, "error reason $errorreason", toast length_long show } } samsungpay spay_ready -> // samsung pay is ready samsungpaybutton setvisibility view visible else -> // not expected result samsungpaybutton setvisibility view invisible } } override fun onfail errorcode int, bundle bundle { samsungpaybutton setvisibility view invisible log d tag, "checksamsungpaystatus onfail $errorcode" } } 3 1 9 activating the samsung wallet app the samsungpay class provides the following api method to activate the samsung wallet app on a device fun activatesamsungpay activatesamsungpay is called to activate the samsung wallet app on the same device on which the partner app is running first, however, the partner app must check the samsung pay status with a getsamsungpaystatus call see section 4 2 above if the status is spay_not_ready and extra_error_reason is error_spay_setup_not_complete, the partner app needs to display an appropriate message to user, then call activatesamsungpay to launch the samsung wallet app so the user can sign in here’s an example of how to code this val serviceid = "partner_app_service_id" val bundle = bundle bundle putstring samsungpay partner_service_type, spaysdk servicetype inapp_payment tostring val partnerinfo = partnerinfo serviceid, bundle val samsungpay = samsungpay context, partnerinfo samsungpay activatesamsungpay 3 1 10 updating the samsung wallet app the samsungpay class provides the following api method to update the samsung wallet app on the device fun gotoupdatepage gotoupdatepage is called to update samsung wallet app on the same device on which the partner app is running as with all api calls, the partner app must first check the samsung pay status with getsamsungpaystatus if this returns spay_not_ready and extra_error_reason is error_spay_app_need_to_update, then the partner app needs to display an appropriate message to the user and call gotoupdatepage , which launches the samsung pay update page the following code sample reflects how to update samsung pay val serviceid = "partner_app_service_id" val bundle = bundle bundle putstring samsungpay partner_service_type, spaysdk servicetype inapp_payment tostring val partnerinfo = partnerinfo serviceid, bundle val samsungpay = samsungpay context, partnerinfo samsungpay gotoupdatepage 3 1 11 in-app online the main classes and interfaces involved here are samsungpay– class for a merchant app to get samsung pay sdk information and the status of samsung pay on the device paymentmanager – class to provide payment/transaction functionality cardinfolistener – interface for requestcardinfo result callbacks from samsung wallet customsheettransactioninfolistener – interface for transaction success/failure callbacks from samsung wallet; payment information is provided with a success callback and must be used by the merchant app for processing the payment the flow pictured next captures the essential online payment api process between merchant apps integrated with the samsung pay sdk and samsung wallet and the merchant’s payment gateway pg 3 1 12 api flow for in-app payments the api flow for samsung pay in-app payments involves a series of operations that ensure secure, seamless, and verified payment processing between the merchant app, samsung wallet, and the payment gateway pg these steps are illustrated in the flow diagram above and described below check the ready status of samsung pay use samsungpay getsamsungpaystatus to verify whether samsung pay is installed and supported on the device samsung pay is activated and ready for transactions the user has completed mandatory updates and account setup start the payment manager to establish the service binding and verify the merchant app establish a binding between your app and the samsung wallet app validate that the merchant app is authorized and registered prepare the sdk to handle payment operations get payment card information and the payment amount, including updates this step also includes displaying eligible cards to the user allowing the user to select a card for the transaction collecting or updating the payment amount get/update the user’s billing and shipping addresses, including an updated payment amount if shipping charges will be incurred if required by the transaction retrieve or update the user’s billing and shipping address recalculate and update the total payment amount e g , shipping cost impact authenticate the user trigger authentication via trusted user interface tui , using biometrics or other secure methods supported by samsung wallet submit payment information to pg this ensures the user has authorized the transaction send the tokenized payment data received from samsung pay to your designated payment gateway pg for transaction processing this can be done via a direct merchant server-to-pg connection, or samsung pg interface server if applicable verify transaction success or failure receive confirmation of transaction success or failure from the payment gateway communicate the result back to the user and update your app's ui and backend accordingly 3 1 13 token modes network vs gateway to complete the payment, the merchant’s designated payment gateway pg handles one of two types of tokens gateway tokens indirect or network tokens direct the samsung pay sdk supports both types the essential difference between the two types is who decrypts the token information network tokens require that the merchant app handles decryption of the token bundle or work with the pg to handle decryption, whereas gateway token decryption is handled by the pg via the samsung-pg interface server network token mode direct user selects samsung pay as the payment method at checkout in the merchant app and the samsung pay app requests partner verification from the samsung pay online payment server encrypted payment information is passed from the samsung pay app to the pg through the merchant app via the pg sdk applying the merchant's private key, pg decrypts the payment information structure and processes the payment through the acquirer and payment network upon receiving authorization or rejection, pg notifies the merchant app through its pg sdk gateway token mode indirect user selects samsung pay as the payment method at checkout in the merchant app and the samsung pay app requests partner verification from the samsung pay online payment server encrypted payment information and the partner id are passed to the samsung-pg interface server samsung-pg interface server sends a transaction authorization request to the pg on behalf of the merchant; pg authenticates the partner id before generating a transaction reference id reference id is passed to merchant app via sdk callback merchant app then passes the reference id to the pg for payment process execution samsung-pg interface server returns the payment token to the pg i e , gateway token it received from samsung pay app in step 2 pg continues payment processing with the acquirer and payment network the result approved/declined is returned to the merchant app on the device for display to the user check with your pg to determine its specific requirements for payment processing regardless of the pg model employed, direct or indirect, the goal is to offer samsung pay as a secure payment method within your merchant app the most common use case involves the following general steps to make a purchase, the user selects to “buy” or got to checkout after adding items to a shopping cart now in checkout, the user selects a payment option; for example, either the merchant’s “standard” method or samsung pay upon selecting samsung pay, the user is presented with a payment sheet that allows for card selection and shipping address confirmation with the option to add/modify information for this order, whereupon the user makes payment card selection from the list of enrolled cards chooses to change or add the delivery address enters required address information in the form presented and saves it authenticates the payment method, amount, and delivery with a biometric verification fingerprint, iris… or pin 3 1 14 checking registered/enrolled card information before displaying the samsung pay button, a partner app can query card brand information for the user’s currently enrolled payment cards in samsung wallet to determine if payment is supported with the enrolled card for example, if a merchant app accepts one card brand exclusively but the user has not registered any cards matching this brand in samsung wallet, the merchant app needs to determine whether or not to display the samsung pay button for this purchase checkout to query the card brand, use the requestcardinfo api method of the paymentmanager class the requestfilter is optional bundle data reserved for future use the merchant app does not need to set a value for it now however, before calling this method, cardinfolistener must be registered so its listener can provide the following events onresult - called when the samsung pay sdk returns card information from samsung wallet; returns information about enrolled cards or is empty if no card is registered onfailure - called when the query fails; for example, if sdk service in the samsung wallet app ends abnormally the following snippet shows how to retrieve the list of supported card brands from samsung pay val serviceid = "partner_app_service_id" val bundle = bundle bundle putstring samsungpay partner_service_type, spaysdk servicetype inapp_payment tostring val partnerinfo = partnerinfo serviceid, bundle val paymentmanager = paymentmanager context, partnerinfo paymentmanager requestcardinfo bundle , cardinfolistener // get card brand list //cardinfolistener is for listening requestcardinfo callback events val cardinfolistener cardinfolistener = object cardinfolistener { // this callback is received when the card information is received successfully override fun onresult cardresponse list<cardinfo> { var visacount = 0 var mccount = 0 var amexcount = 0 var dscount = 0 var brandstrings = "card info " var brand spaysdk brand? for i in cardresponse indices { brand = cardresponse[i] brand when brand { spaysdk brand americanexpress -> amexcount++ spaysdk brand mastercard -> mccount++ spaysdk brand visa -> visacount++ spaysdk brand discover -> dscount++ else -> { /* other card brands */ } } } brandstrings += " vi = $visacount, mc = $mccount, ax = $amexcount, ds = $dscount" log d tag, "cardinfolistener onresult $brandstrings" toast maketext context, "cardinfolistener onresult" + brandstrings, toast length_long show } /* * this callback is received when the card information cannot be retrieved * for example, when sdk service in the samsung wallet app dies abnormally */ override fun onfailure errorcode int, errordata bundle { //called when an error occurs during in-app cryptogram generation toast maketext context, "cardinfolistener onfailure " + errorcode, toast length_long show } } 3 1 15 creating a transaction request upon successful initialization of the samsungpay class, the merchant app needs to create a transaction request with payment information note as of sdk v2 0 00, the normal payment sheet is deprecated all merchant apps must now use the custom payment sheet, which offers more dynamic controls for tailoring the ui look and feel with additional customer order and payment data merchant app developers choosing to temporarily continue offering the normal sheet will need to configure their android manifest to reflect the pre-2 0 00 version of the sdk used to implement their app’s existing normal sheet, although this is not recommended in all cases, merchant app developers should update their apps with the latest version of the sdk as soon as possible to avoid timing out using an earlier version of the sdk when responding to samsung pay callbacks using the custom payment sheet to initiate a payment transaction with samsung pay’s custom payment sheet, your merchant app must populate the following mandatory fields in customsheetpaymentinfo merchant name - as it will appear in samsung pay’s payment sheet, as well as the user's card account statement amount - the constituent transaction properties currency, item price, shipping price, tax, total price which together determine the total amount the user is agreeing to pay the merchant cautionnot populating the mandatory fields throws an illegalargumentexception optionally, the following fields can be added to the payment information merchant id- can be used for the merchant’s own designated purpose at its discretion unless the merchant uses an indirect pg like stripe or braintree if an indirect pg is used, this field must be set to the merchant’s payment gateway id fetched from the samsung pay developers portal merchant id is mandatory if a merchant requests with a mada token, this field should be included in the payload order number - usually created by the merchant app via interaction with a pg this number is required for refunds and chargebacks in the case of visa cards, the value is mandatory the allowed characters are [a-z][a-z][0-9,-] and the length of the value can be up to 36 characters address - the user’s billing and/or shipping address see applying an addresscontrol for details allowed card brands - specifies card brands accepted by the merchant if no brand is specified, all brands are accepted by default if at least one brand is specified, all other card brands not specified are set to "card not supported’ on the payment sheet here’s the 'customsheetpaymentinfo' structure class customsheetpaymentinfo parcelable { private val version string? = null private val merchantid string? = null private val merchantname string? = null private val ordernumber string? = null private val addressinpaymentsheet addressinpaymentsheet = addressinpaymentsheet do_not_show private val allowedcardbrand list<spaysdk brand>? = null private val cardinfo cardinfo? = null private val iscardholdernamerequired = false private val isrecurring = false private val merchantcountrycode string? = null private val customsheet customsheet? = null private val extrapaymentinfo bundle? = null } your merchant app sends this customsheetpaymentinfo to samsung wallet via the applicable samsung pay sdk api methods upon successful user authentication in direct mode, samsung wallet returns the above "payment info" structure and a result string the result string is forwarded to the pg by your merchant app to complete the transaction it will vary based on the pg you’re using note if you want to add any other information for any card brand, you can add them in the extrapaymentinfo bundle the following example demonstrates how to populate customsheet in the customsheetpaymentinfo class see sample merchant app using custom payment sheet below for example usage of each customsheet control /* * make user's transaction details * the merchant app should send customsheetpaymentinfo to samsung wallet via * the applicable samsung pay sdk api method for the operation being invoked */ private fun makecustomsheetpaymentinfo customsheetpaymentinfo { val brandlist = arraylist<spaysdk brand> // if the supported brand is not specified, all card brands in samsung wallet are // listed in the payment sheet brandlist add paymentmanager brand visa brandlist add paymentmanager brand mastercard brandlist add paymentmanager brand americanexpress /* * make the sheetcontrols you want and add them to custom sheet * place each control in sequence with amountboxcontrol listed last */ val customsheet = customsheet customsheet addcontrol makebillingaddresscontrol customsheet addcontrol makeshippingaddresscontrol customsheet addcontrol makeplaintextcontrol customsheet addcontrol makeshippingmethodspinnercontrol customsheet addcontrol makeamountcontrol val extrapaymentinfo = bundle /* * you can add transaction type for mada card brand * the supported values are purchase and preauthorization * if you don't set any value, the default value is purchase */ extrapaymentinfo putstring spaysdk extra_online_transaction_type, spaysdk transactiontype preauthorization tostring val customsheetpaymentinfo = customsheetpaymentinfo builder setmerchantid "123456" setmerchantname "sample merchant" // merchant requires billing address from samsung wallet and // sends the shipping address to samsung wallet // show both billing and shipping address on the payment sheet setaddressinpaymentsheet customsheetpaymentinfo addressinpaymentsheet need_billing_send_shipping setallowedcardbrands brandlist setcardholdernameenabled true setrecurringenabled false setcustomsheet customsheet setextrapaymentinfo extrapaymentinfo build return customsheetpaymentinfo } 3 1 16 requesting payment with a custom payment sheet the startinapppaywithcustomsheet method of the paymentmanager class is applied to request payment using a custom payment sheet in samsung wallet the two methods are defined as follows startinapppaywithcustomsheet - initiates the payment request with a custom payment sheet the payment sheet persists for 5 minutes after the api is called if the time limit expires, the transaction fails updatesheet - must be called to update current payment sheet as of api level 1 5, a merchant app can update the custom sheet with a custom error message refer to updating sheet with custom error message when you call the startinapppaywithcustomsheet method, a custom payment sheet is displayed on the merchant app screen from it, the user can select a registered card for payment and change the billing and shipping addresses, as necessary the result is delivered to customsheettransactioninfolistener, which provides the following events onsuccess - called when samsung pay confirms payment it provides the customsheetpaymentinfo object and the paymentcredential json string customsheetpaymentinfo is used for the current transaction it contains amount, shippingaddress, merchantid, merchantname, ordernumber api methods exclusively available in the onsuccess callback comprise getpaymentcardlast4dpan – returns the last 4 digits of the user's digitized personal/primary identification number dpan getpaymentcardlast4fpan – returns the last 4 digits of the user's funding personal/primary identification number fpan getpaymentcardbrand – returns the brand of the card used for the transaction getpaymentcurrencycode – returns the iso currency code in which the transaction is valued getpaymentshippingaddress – returns the shipping/delivery address for the transaction getpaymentshippingmethod – returns the shipping method for the transaction for pgs using the direct model network tokens , the paymentcredential is a json object containing encrypted cryptogram which can be passed to the pg pgs using the indirect model gateway tokens like stripe, it is a json object containing reference card reference – a token id generated by the pg and status i e , authorized, pending, charged, or refunded refer to payment credential sample for details oncardinfoupdated - called when the user changes the payment card in this callback, updatesheet method must be called to update current payment sheet onfailure - called when the transaction fails; returns the error code and errordata bundle for the failure here’s how to call the startinapppaywithcustomsheet method of the paymentmanager class /* * customsheettransactioninfolistener is for listening callback events of in-app custom sheet payment * this is invoked when card is changed by the user on the custom payment sheet, * and also with the success or failure of online in-app payment */ private val transactionlistener = object customsheettransactioninfolistener { // this callback is received when the user changes card on the custom payment sheet in samsung pay override fun oncardinfoupdated selectedcardinfo cardinfo, customsheet customsheet { /* * called when the user changes card in samsung wallet * newly selected cardinfo is passed so merchant app can update transaction amount * based on different card if needed , */ val amountboxcontrol = customsheet getsheetcontrol amount_control_id as amountboxcontrol amountboxcontrol updatevalue product_item_id, 1000 0 //item price amountboxcontrol updatevalue product_tax_id, 50 0 // sales tax amountboxcontrol updatevalue product_shipping_id, 10 0 // shipping fee amountboxcontrol updatevalue product_fuel_id, 0 0, "pending" // additional item status amountboxcontrol setamounttotal 1060 0, amountconstants format_total_price_only // grand total customsheet updatecontrol amountboxcontrol // call updatesheet with amountboxcontrol; mandatory try { paymentmanager updatesheet customsheet } catch e java lang illegalstateexception { e printstacktrace } catch e java lang nullpointerexception { e printstacktrace } } /* * this callback is received when the payment is approved by the user and the transaction payload * is generated payload can be an encrypted cryptogram network token mode or the pg's token * reference id gateway token mode */ override fun onsuccess response customsheetpaymentinfo, paymentcredential string, extrapaymentdata bundle { /* * called when samsung pay creates the transaction cryptogram, which merchant app then sends * to merchant server or pg to complete in-app payment */ try { val dpan = response cardinfo cardmetadata getstring spaysdk extra_last4_dpan, "" val fpan = response cardinfo cardmetadata getstring spaysdk extra_last4_fpan, "" toast maketext context, "dpan " + dpan + "fpan " + fpan, toast length_long show } catch e java lang nullpointerexception { e printstacktrace } toast maketext context, "transaction onsuccess", toast length_long show } override fun onfailure errorcode int, errordata bundle { // called when an error occurs during cryptogram generation toast maketext context, "transaction onfailure $errorcode", toast length_long show } } private fun startinapppaywithcustomsheet { // show custom payment sheet try { val bundle = bundle bundle putstring samsungpay partner_service_type, spaysdk servicetype inapp_payment tostring val partnerinfo = partnerinfo serviceid, bundle paymentmanager = paymentmanager context, partnerinfo // request payment using samsung wallet paymentmanager startinapppaywithcustomsheet makecustomsheetpaymentinfo , transactionlistener } catch e illegalstateexception { e printstacktrace } catch e numberformatexception { e printstacktrace } catch e nullpointerexception { e printstacktrace } catch e illegalargumentexception { e printstacktrace } } when an address is provided by samsung wallet, onaddressupdated is called whenever address information is updated in the custom payment sheet you can use the updatesheet method to update the shipping fee or any other relevant information in the payment sheet set the errorcode to determine if the address provided by samsung wallet app is invalid, out of delivery, or does not exist for example, when the merchant does not support the product delivery to the designated location billing address from samsung wallet is not valid for tax recalculation for all such cases, the merchant app should call updatesheet with one of the following error codes error_shipping_address_invalid error_shipping_address_unable_to_ship error_shipping_address_not_exist error_billing_address_invalid error_billing_address_not_exist the sample code included below under applying the address control demonstrates how to use the updatesheet method for 'addresscontrol' in the payment sheet 3 1 17 payment credential sample the paymentcredential is the resulting output of the startinapppaywithcustomsheet method the structure varies depending on the pg you’re using and the integration model—direct or indirect the following paymentcredential is for a visa card for pg using direct network token mode – e g first data, adyen, visa cybersourse sample paymentcredential json output using jwe-only { "billing_address" {"city" "billingcity","country" "usa","state_province" "ca","street" "billingaddr1","zip_postal_code" "123456"}, "card_last4digits" "1122", "3ds" {"data" "eyjhbgcioijsu0exxzuilcjrawqioijcak91a1h2afv4wu5wofiwvgs2y25oactzwwfqzxhiehrvz0vfdhlhyy9npsisinr5cci6ikppu0uilcjjagfubmvsu2vjdxjpdhldb250zxh0ijoiulnbx1blssisimvuyyi6ikexmjhhq00ifq fg2oouvhdgkkivyba2s5kturpwueujkzeyxz7n6kalhqahszv3p5jabaoj-rokcznfjdg3qierzjktu7zxst9gwv4oclahpfdw64w0x6ttaxeyjiivkjug-edxxtwajeyeikgc68wehf1cltsqg4zlwi6upvcaywdppbn0hl0c5wcf5az4wabytv_fda5ahguypne70keqrtwdlacw9mzejx2xth7msd9ohoulr8luq-7gha17jhoobwgmoq9q0haocnm0ljwiuhkoryyu-njulnbkk8fzus_aiumgdv2yn9ygfqilmculb0vwuf0yekx6isgaxi0zqhliusjkcz_w auzzxog46lnrtk3q qe2llws30vzh-zduue8b045cnfrm2p-rjzgbnzchels3v26n64cfg1av5mtp5f-fswbj3ntp5x4v1nk8fmdy0uspxzemfvl5badgac7w9frxt6x5xv1fqu6-q-zkbxcb9bygownt983bckoe1bd5djxfbodlrc4j68ikdjc5m3lebdx6hv0aqzkmilch-jevl3awqykbny4vj7m3fizw7u1prli2zfwukxdfs4vwv3bpm4qudemvnhxj qtymdmn4ne93juljnmwkjg","type" "s","version" "100"}, "merchant_ref" "merchantid", "method" "3ds", "recurring_payment" false } decrypt using the merchant’s private key below is sample private key -----begin rsa private key----- miieowibaakcaqea4lzyjqr+dqd/xleoxct9jwtjxhd2ptjke9djtmijki0h2oc2ghow4ujhhy/1jvft2+zcnjtoxuvlp+76/dwa3bcwfrj+fpp6x5kkylpb+djdyo1ttumltnqcwymjb3u7jbc+xr4vkfrzqjxke7xhn/sbb82ue8c3smzvkynuji<…> -----end rsa private key----- the decrypted output will be similar to this { "amount" "1000", "currency_code" "usd", "utc" "1490266732173", "eci_indicator" "5", "tokenpan" "1234567890123456", "tokenpanexpiration" "0420", //the format is **mmyy** "cryptogram" "ak+zkbpmcorcabcd3agraoacfa==" } note for amex, it needs to be displayed in the format “yymmdd”, so i would like to add this processing the payload depending on the structure of the payment processing api provided by your pg, your merchant app can send either of these directly to the pg entire paymentcredential output extracted “3ds” part only consult your pg documentation for specific guidance when using indirect model e g stripe in indirect gateway token mode, paymentcredential is the pg’s token reference id and its status here’s a sample of the json output { "reference" "tok_18rje5e6szui23f2mefakep7", "status" "authorized" } for stripe, your merchant app should be able to pass this token object directly to charge or another appropriate payment processing api provided by the pg 3 1 18 push provisioning the following diagram illustrates the flows of the app-to-app apis for payment card push provisioning the main classes involved are samsung pay – for fetching samsung wallet app status and wallet information on the device paymentmanager – for push provisioning and invoking favorite cards payment functionalities cardmanager – for payment card management watchmanager – for all functions related to samsung pay watch 3 1 19 requesting registered card list in the samsung pay the getallcards method of the cardmanager class is used to request a list of all cards currently registered/enrolled in samsung wallet on the same device running the issuer’s app to succeed, the issuer app must pass valid partnerinfo to 'cardmanager' for caller verification 'cardfilter' narrows the card list returned by samsung wallet to the issuername specified please be noted that getsamsungpaystatus must be called before getallcards getallcards could not return a cards list when getsamsungpaystatus responds with a code other than spay_ready noteto get the cards list of samsung pay watch, you have to use the watchmanager class instead of the cardmanager class as of api level sdk version 1 4, cardfilter retrieves this information from the samsung pay developers portal certain issuers may need to register multiple issuer name s with the portal, depending on their app and/or the requirements of their token service provider tsp the getallcards parameter cardfilter matches the issuer name s specified with those registered in the portal only complete matches are returned this method is typically called when your partner app wants to check the card status it does not need to be called every time the partner app resumes therefore, you should create the card list with the 'oncreate ' method, rather than the 'onresume ' method the result of a getallcards call is delivered to getcardlistener, which provides the following events onsuccess - called when the operation succeeds; provides the list of all filtered cards and their status card information includes cardid, cardstatus, and extra cardinfo data onfail - called when the operation fails here’s an example of how to use the 'getallcards ' api method in your issuer app val cardfilter = bundle // since api level 1 4, cardfilter param is ignored partner does not need to use it here // it is retrieved from the samsung pay developers portal cardfilter putstring cardmanager extra_issuer_name, issuername cardmanager getallcards null, object getcardlistener{ override fun onsuccess cards mutablelist<card>? { // getting card status is success if cards == null || cards isempty { log e tag, "no card is found" return } else { // perform operation with card data for s in cards { log d tag, "cardid " + s cardid + "cardstatus " + s cardstatus // get extra card data if s cardinfo != null { val cardid = s cardid // since api level 2 13, id from card network val last4fpan = s cardinfo getstring cardmanager extra_last4_fpan val last4dpan = s cardinfo getstring cardmanager extra_last4_dpan val cardtype = s cardinfo getstring cardmanager extra_card_type val cardissuername = s cardinfo getstring cardmanager extra_issuer_name log d tag, "last4fpan $last4fpan last4dpan $last4dpan cardid $cardid" } } } } override fun onfail errorcode int, errordata bundle? { // getting card status is failed } } 3 1 20 getting wallet information the samsungpay class provides the getwalletinfo api method, which is called to request wallet information from the samsung wallet app prior to calling the addcard api, when you want to avoid duplicate provisioning your issuer app uses this information to uniquely identify the user and the samsung wallet app on a particular device wallet device management id, device id, and wallet user id note to get wallet information of samsung pay watch, you have to use the watchmanager class instead of the cardmanager class fun getwalletinfo list<string> keys, statuslistener callback the following example demonstrates how to use it // set the serviceid assigned by the samsung pay developers portal during service creation val serviceid = "sampleserviceid" val bundle = bundle bundle putstring samsungpay extra_issuer_name, "issuer name" bundle putstring samsungpay partner_service_type, servicetype app2app tostring val pinfo = partnerinfo serviceid, bundle val samsungpay = samsungpay context, pinfo // add bundle keys to get wallet information from samsung pay // this information can be delivered to the partner server for an eligibility check val keys = arraylist<string> keys add samsungpay wallet_user_id keys add samsungpay device_id samsungpay getwalletinfo keys, object statuslistener{ override fun onsuccess status int, walletdata bundle { // log d tag, "dowalletinfo onsuccess callback is called" ; // for visa, deviceid can be set to "clientdeviceid" as defined by visa val deviceid = walletdata getstring samsungpay device_id // for visa, walletuserid can be set to "clientwalletaccountid" as defined by visa val walletuserid = walletdata getstring samsungpay wallet_user_id } override fun onfail errorcode int, errordata bundle? { log e tag, "onfail callback is called, errorcode " + errorcode ; // check the extra error codes in the errordata bundle for all the reasons in // samsungpay extra_error_reason, when provided } } 3 1 21 adding a card to samsung pay your issuer app calls the 'addcard ' api method of cardmanager to add a card to samsung wallet by providing the required card details, your app can make it convenient and easy for users to add their bank-issued debit/credit cards to samsung wallet directly from your app without additional steps, like switching between apps note if you want to add a card to samsung pay watch, you have to use the 'watchmanager' class instead of the cardmanager class for most issuers, getwalletinfo suffices for requesting current wallet information the response from samsung wallet tells the issuer app whether or not the user’s card has already been added to samsung wallet or is ineligible for provisioning it is therefore recommended that you call getwalletinfo before displaying the add to samsung pay button if the card is eligible, display the “add” button and, if the user taps it, call addcard important remember to obtain the governing issuer implementation guide s and specifications from the respective card network and implement each network’s required handling in your partner app and server the 'addcard ' result is delivered to addcardlistener, which provides the following events onsuccess - called when the operation succeeds; provides information and status regarding the added card onfail - called when the operation fails; returns the error code and extra bundle data such as extra_error_reason or extra_request_id if provided onprogress - called to indicate the current progress of the 'addcard ' operation; can be used to show a progress bar to the user in the issuer app this callback is supported for tsm solution issuers in china and spain here’s an example of how to use the addcard api method in your issuer app val cardtype = card card_type_credit val tokenizationprovider string = addcardinfo provider_abcd // samsung pay does not provide detailed payload information; generate the provisioning payload in // accordance with your card network specifications val testpayload = "thisistestpayloadcardinfo1234567890" //bin bank identification number can be set to issuerid it is mandatory for some card network val issuerid = "123456" val carddetail = bundle carddetail putstring extra_provision_payload, testpayload carddetail putstring extra_issuer_id, issuerid val addcardinfo = addcardinfo cardtype, tokenizationprovider, carddetail cardmanager addcard addcardinfo, object addcardlistener { override fun onsuccess status int, card card? { log d tag, "onsuccess callback is called" ; } override fun onfail errorcode int, errordata bundle? { log d tag, "onfail callback is called" ; // check some extra error codes in the errordata bundle // such as samsungpay extra_error_reason or samsungpay extra_request_id if provided } override fun onprogress currentcount int, totalcount int, bundledata bundle? { log d tag,"onprogress callback is called " + currentcount + " / " + totalcount ; } } 3 1 22 adding a co-badge card to samsung pay co-badge payment cards combine two payment brands/networks to add a co-badge card through push provisioning, you must provide two different card network details one for the primary card network and another for the secondary card network issuer app calls the addcobadgecard api method of cardmanager to add a co-badge card to samsung pay in most cases, calling getwalletinfo will suffice to request current wallet information the response from samsung pay indicates whether the user's co-badge card has already been added to samsung pay or is ineligible for provisioning therefore, it is advisable to call getwalletinfo before displaying the add to samsung pay button if the co-badge card is eligible, display the "add" button and, upon user tapping, call addcobadgecard important please remember to refer to the relevant issuer implementation guide s and specifications provided by each card network and ensure that your partner app and server adhere to their specific requirements the addcobadgecard result is delivered to addcardlistener, which provides the following events onsuccess - called when the operation succeeds; provides information and status regarding the added card onfail - called when the operation fails; returns the error code and extra bundle data such as extra_error_reason or extra_request_id if provided onprogress - called to indicate the current progress of the 'addcard ' operation; can be used to show a progress bar to the user in the issuer app this callback is supported for tsm solution issuers in china and spain here’s an example of how to use the addcobadgecard api method in your issuer app notesamsung pay does not provide detailed payload information; generate the provisioning payload in accordance with your card networks specifications string cardtype = card card_type_credit; string primarytokenizationprovider = addcardinfo provider_abcd; //provide your primary card network payload string testprimarypayload = "thisistestprimarypayloadcardinfo1234567890"; string secondarytokenizationprovider = addcardinfo provider_efgh; //provide your secondary card network payload string testsecondarypayload = "thisistestsecondarypayloadcardinfo1234567890"; bundle primarycarddetail = new bundle ; primarycarddetail putstring addcardinfo extra_provision_payload, testprimarypayload ; addcardinfo primaryaddcardinfo = new addcardinfo cardtype, primarytokenizationprovider, primarycarddetail ; bundle secondarycarddetail = new bundle ; secondarycarddetail putstring addcardinfo extra_provision_payload, testsecondarypayload ; addcardinfo secondaryaddcardinfo = new addcardinfo cardtype, secondarytokenizationprovider, secondarycarddetail ; cardmanager addcobadgecard primaryaddcardinfo, secondaryaddcardinfo, new addcardlistener { @override public void onsuccess int status, card card { log d tag, "onsuccess callback is called" ; } @override public void onfail int error, bundle errordata { log d tag, "onfail callback is called" ; check some extra error codes in the errordata bundle such as samsungpay extra_error_reason or samsungpay extra_request_id if provided } @override public void onprogress int currentcount, int totalcount, bundle bundledata { log d tag,"onprogress callback is called " + currentcount + " / " + totalcount ; } } ; 3 1 23 sample applications sample apps, use cases, and ux strategies are included here to aid you in understanding the sdk and implementing it in your application sample source code and apks can be downloaded from download section sample merchant app included with the samsung pay sdk to demonstrate its features, the sample merchant app shows you how to implement the payment sheet’s dynamic controls to leverage additional customer order and payment data and/or create a more custom ui look and feel the following payment sheet controls are available addresscontrol plaintextcontrol amountboxcontrol spinnercontrol controls are applied to suit a particular purpose or need for example, displaying a promotion notice in the payment sheet using the plaintextcontrol applying an addresscontrol this control is used to display the billing or shipping address on the payment sheet based on samsung pay’s my info user profile or addresses provided by your merchant app during the transaction request when creating the control, controlld and sheetitemtype are needed to distinguish the billing address from the shipping address otherwise, your merchant app sets the following properties address title – displays a merchant-defined title on the payment sheet if empty, the default title such as “billing address” is displayed address – provides various methods to retrieve address details the merchant app can retrieve the phone number using the 'getphonenumber' method of 'customsheetpaymentinfo' address starting from api level 1 5, the addressee’s email address has also been added retrieve the email address using 'getemail' you can also set a display option for the shipping address with 'setdisplayoption' for more information, see the samsung pay sdk-api reference javadoc and the sample code included with the samsung pay sdk sheetupdatedlistener – used to capture the response from the samsung wallet app; merchant app must deliver to the samsung wallet app an amountboxcontrol to display payment information on a custom payment sheet when the onresult callback is called, the updatesheet method must also be called to update the current payment sheet errorcode – used for containing error codes directly related to the address the workflows for billingaddresscontrol the workflow for shippingaddresscontrol the following sample code demonstrates use of addresscontrol on the payment sheet fun makebillingaddresscontrol addresscontrol { val billingaddresscontrol = if !iszipcodeonly { // for billing address addresscontrol billing_address_id, sheetitemtype billing_address billingaddresscontrol addresstitle = "billing address" } else { /* * for billing address with zip code only * since api level 2 19, sheetitemtype zip_only_address * for us country only */ addresscontrol billing_address_id, sheetitemtype zip_only_address billingaddresscontrol addresstitle = "zip code" } //this callback is received when controls are updated billingaddresscontrol sheetupdatedlistener = sheetupdatedlistener return billingaddresscontrol } //listener for billing or zip code only billing address fun sheetupdatedlistener sheetupdatedlistener { return sheetupdatedlistener { updatedcontrolid string, customsheet customsheet -> log d tag, "onresult billingaddresscontrol updatedcontrolid $updatedcontrolid" val addresscontrol = customsheet getsheetcontrol updatedcontrolid as addresscontrol val billaddress = addresscontrol address //validate only zipcode or billing address and set errorcode if needed if addresscontrol sheetitem sheetitemtype == sheetitemtype zip_only_address { val errorcode int = validatezipcodebillingaddress billaddress log d tag, "onresult updatesheetbilling errorcode $errorcode" addresscontrol errorcode = errorcode customsheet updatecontrol addresscontrol } else { val errorcode = validatebillingaddress billaddress log d tag, "onresult updatesheetbilling errorcode $errorcode" addresscontrol errorcode = errorcode customsheet updatecontrol addresscontrol } // update transaction values val amountboxcontrol = customsheet getsheetcontrol amount_control_id as amountboxcontrol amountboxcontrol updatevalue product_item_id, 1000 0 amountboxcontrol updatevalue product_tax_id, 50 0 amountboxcontrol updatevalue product_shipping_id, 10 0 amountboxcontrol updatevalue product_fuel_id, 0 0, "pending" amountboxcontrol setamounttotal 1060 0, amountconstants format_total_price_only customsheet updatecontrol amountboxcontrol try { // call updatesheet for the full amountboxcontrol; mandatory paymentmanager updatesheet customsheet } catch e illegalstateexception { e printstacktrace } catch e nullpointerexception { e printstacktrace } } } // for shipping address fun makeshippingaddresscontrol addresscontrol { val shippingaddresscontrol = addresscontrol shipping_address_id, sheetitemtype shipping_address shippingaddresscontrol addresstitle = "shipping address" val shippingaddress = customsheetpaymentinfo address builde setaddressee "name" setaddressline1 "addline1" setaddressline2 "addline2" setcity "city" setstate "state" setcountrycode "usa" setpostalcode "zip" setphonenumber "555-123-1234" setemail "user@samsung com" build shippingaddresscontrol address = shippingaddress /* * set address display option on custom payment sheet * if displayoption is not set, then default addresscontrol is displayed on custom payment sheet * the possible values are combination of below constants * {display_option_addressee} * {display_option_address} * {display_option_phone_number} * {display_option_email} */ var displayoption_val = addressconstants display_option_addressee // addressee is mandatory displayoption_val += addressconstants display_option_address displayoption_val += addressconstants display_option_phone_number displayoption_val += addressconstants display_option_email shippingaddresscontrol displayoption = displayoption_val return shippingaddresscontrol } here’s how these controls display on a custom payment sheet billing address control zip code billing address control shipping address control applying a plaintextcontrol this control is used for displaying a title with two lines of text or a single line of text without a title on the payment sheet when allocating this control, a controlid is needed the merchant app sets both the title, as applicable, and the text diagrammed below is the flow between your merchant app and samsung pay plaintextcontrol flow the merchant app code invoking this class would look something like the following fun makeplaintextcontrol plaintextcontrol { val plaintextcontrol = plaintextcontrol "exampleplaintextcontrolid" plaintextcontrol settext "plain text [example]", "this is example of plaintextcontrol" return plaintextcontrol } and this is how it displays on the custom payment sheet applying an amountboxcontrol amountboxcontrol is used for displaying purchase amount information on the payment sheet it requires a controlid and a currencycode, and consists of item s and amounttotal, defined as follows and diagrammed on the next page item – consists of id, title, price, and extraprice if there is an extraprice in amountboxcontrol, its text is displayed on the payment sheet even though there is an actual numerical price value if there is no extraprice, then currencycode with the price value is displayed amounttotal – consists of price and displayoption the displayoption allows predefined strings only your merchant app can set the text to “estimated amount”, “amount pending”, “pending”, “free”, and so forth the ui format for the string is different for each option note the setamounttotal api may accept strings that are not predefined as an argument, but it generates an invalid parameter condition or returns an error code in such cases for details, see the javadoc samsung pay sdk-api reference, available in the documentation folder of your downloaded sdk package here’s a coding example to demonstrate the use of amountboxcontrol in a payment sheet fun makeamountcontrol amountboxcontrol { val amountboxcontrol = amountboxcontrol amount_control_id, "usd" amountboxcontrol additem product_item_id, "item", 1000 0, "" amountboxcontrol additem product_tax_id, "tax", 50 0, "" amountboxcontrol additem product_shipping_id, "shipping", 10 0, "" amountboxcontrol setamounttotal 1060 0, amountconstants format_total_price_only amountboxcontrol additem 3, product_fuel_id, "fuel", 0 0, "pending" return amountboxcontrol } the merchant app can also add new items using the 'additem' method of 'amountcontrolbox' during callback important your merchant app needs to call the updatevalue item_id method of amountboxcontrol to update each amount item then call customsheet updatecontrol to make the changes take effect in customsheet eventually, paymentmanager updatesheet 'customsheet' must be called to let samsung pay know that no further action is pending in the merchant app when the custom sheet is updated, the merchant can add new items to amountboxcontrol for example, if the user selects a specific card in the payment sheet which the merchant offers, a discount item can be added via the updatesheet // example for adding new item while updating values val amount = sheet getsheetcontroll "id_amount" amount updatevalue "itemid", 900 0 amount updatevalue "taxid", 50 0 amount updatevalue "shippingid", 10 0 amount updatevalue "fuelid", 0 0 // add “discount” item amount additem 4, "discountid", "discount", -60 0, "" amount setamounttotal 1000 0, amountconstants format_total_price_only sheet updatecontrol amount // call updatesheet with amountboxcontrol; mandatory try { paymentmanager updatesheet sheet } catch e illegalstateexception { e printstacktrace } catch e nullpointerexception { e printstacktrace } applying the spinnercontrol this control is used for displaying spinner options on a payment sheet when creating the control, controlid, title, and sheetitemtype are needed to distinguish between the types of spinner to be displayed your merchant app sets the following properties with spinnercontrol title – the merchant-defined spinner title to appear the payment sheet sheetitemtype – provides various types of spinner a shipping_method_spinner and an installment_spinner are the two types of spinner available as of api level 1 6 note shipping_method_spinner can be used when the shipping address comes from the samsung wallet app; i e , when the customsheetpaymentinfo addressinpaymentsheet option is set to need_billing_and_shipping or need_ shipping_spay when the shipping address is provided by the merchant app send_shipping or need_billing_ send_shipping , it is not changeable in the payment sheet the shipping fee if applied must be pre-calculated on the merchant app side here’s an example of constructing a spinnercontrol within your merchant app // construct spinnercontrol for shipping method val spinnercontrol = spinnercontrol shippingmethod_spinner_id, "shipping method ", sheetitemtype shipping_method_spinner // let the user can select one shipping method option on the payment sheet spinnercontrol additem "shipping_method_1", getstring android r string standard_shipping_free spinnercontrol additem "shipping_method_2", getstring android r string twoday_shipping spinnercontrol additem "shipping_method_3", getstring android r string oneday_shipping spinnercontrol selecteditemid = "shipping_method_1" // set default option // listen for sheetcontrol events spinnercontrol setsheetupdatedlistener sheetupdatedlistener { updatedcontrolid, customsheet -> val amountboxcontrol = customsheet getsheetcontrol amount_control_id as amountboxcontrol val spinnercontrol = customsheet getsheetcontrol updatedcontrolid as spinnercontrol when spinnercontrol selecteditemid { "shipping_method_1" -> amountboxcontrol updatevalue product_shipping_id, 10 0 "shipping_method_2" -> amountboxcontrol updatevalue product_shipping_id, 10 + 0 1 "shipping_method_3" -> amountboxcontrol updatevalue product_shipping_id, 10 + 0 2 else -> amountboxcontrol updatevalue product_shipping_id, 10 0 } amountboxcontrol setamounttotal 1000 + amountboxcontrol getvalue product_shipping_id , amountconstants format_total_price_only customsheet updatecontrol amountboxcontrol // call updatesheet with amountboxcontrol; mandatory try { paymentmanager updatesheet customsheet } catch e illegalstateexception { e printstacktrace } catch e nullpointerexception { e printstacktrace } } // construct spinnercontrol for installment plan val spinnercontrol = spinnercontrol installment_spinner_id, "installment", sheetitemtype installment_spinner spinnercontrol additem "installment_1", "1 month without interest" spinnercontrol additem "installment_2", "2 months with 2% monthly interest" spinnercontrol additem "installment_3", "3 months with 2 2% monthly interest" spinnercontrol selecteditemid = "installment_1" // set default option // listen for sheetcontrol events spinnercontrol setsheetupdatedlistener sheetupdatedlistener { updatedcontrolid, customsheet -> val amountboxcontrol amountboxcontrol = customsheet getsheetcontrol amount_control_id as amountboxcontrol val spinnercontrol = customsheet getsheetcontrol updatedcontrolid as spinnercontrol val totalinterest = 0 0 when spinnercontrol selecteditemid { "installment1" -> amountboxcontrol updatevalue product_total_interest_id, totalinterest "installment2" -> // calculate total interest again and updatevalue amountboxcontrol updatevalue product_total_interest_id, totalinterest "installment3" -> // calculate total interest again and updatevalue amountboxcontrol updatevalue product_total_interest_id, totalinterest else -> amountboxcontrol updatevalue product_total_interest_id, totalinterest } amountboxcontrol setamounttotal 1000 + amountboxcontrol getvalue product_total_interest_id , amountconstants format_total_price_only customsheet updatecontrol amountboxcontrol // call updatesheet with amountboxcontrol; mandatory try { paymentmanager updatesheet customsheet } catch e illegalstateexception { e printstacktrace } catch e nullpointerexception { e printstacktrace } } update sheet with custom error message to display a custom error message on the payment sheet, use updatesheet with customerrormessage fun updatesheet sheet customsheet, errorcode int, customerrormessage string this api method is an extended version of the existing updatesheet sheet method which gives the merchant the ability to display a custom error message in the payment sheet’s authentication area it can be used to inform the user of any foreseen error scenarios encountered // update sheet with custom_messsage error code paymentmanager updatesheet customsheet, paymentmanager custom_message,"phone number entered is not valid please change your phone number " sample issuer app the samsung pay sdk also provides a sample issuer app to showcase samsung pay sdk features issuer app can add card to samsung wallet by selecting specific token service provider tsp from the dropdown menu to add cobadge card you need to select primary and secondary token service providers tsp from the dropdown menus for more information, refer to the samsung pay sdk api reference and sample code 3 1 24 api references