Checkout Management API

This documentation describes the Snabble API endpoints related to the management and simple access of checkouts. These endpoints are available on the api subdomain. See General API access for general information about api access.

Info operation

Create Checkout Info: POST /{project}/checkout/info

Process operations

List Checkout Processes: GET /{project}/checkout/process
Create Checkout Process: POST /{project}/checkout/process
Get Checkout Process: GET /{project}/checkout/process/{id}
Modify Checkout Process: PATCH /{project}/checkout/process/{id}
Create Checkout Process Appoval: POST /{project}/checkout/process/{id}/approval

Content Types

Content-Type : application/json

The payload is a JSON document of the specified type.

Data Model

Cart

Parameter	Type	Description
`clientID`	`string`	The ID of the client/device
`appUserID`	`string`	The ID of the appUser
`session`	`string`	Current session ID
`shopID`	`string`	ID of the shop
`items`	`CartItem[]`	Array of cart items
`customer`	`object`	Contains further information to the customer, e.g.loyaltyCard number

A cart item contains following information:

Parameter	Type	Default	Description
`id`	`string`	null	ID of the item
`sku`	`string`		SKU of the product
`amount`	`int`		Number of products
`weight`	`int`	null	Weight of product in case of a weighable (a not packaged) product
`weightUnit`	`string`	null	Unit of the weight
`units`	`int`	null	Number of units in a package in case of bundle or piece product
`price`	`int`	null	Price of the product in case of an encoded price
`scannedCode`	`string`		Scanned code

Example:

{
  "session": "d06474fa-1584-11e8-b642-0ed5f89f718b",
  "clientID":  "772fdd23-0161-4e3e-85d0-af2a52fbe3f7",
  "appUserID": "d7b5a85a-4186-466e-99ee-414fe93951f3",
  "shopID": "shop-01",
  "items": [
    {"sku": "1", "amount": 2, "scannedCode": "0000000000001" },
    {"sku": "2", "amount": 1, "weight": 102, "weightUnit": "g", "scannedCode": "0000000000002"},
    {"sku": "3", "amount": 42, "scannedCode": "0000000000003"},
    {"sku": "4", "amount": 1, "units": 6, "scannedCode": "000000000004"},
    {"sku": "5", "amount": 1, "price": 129, "scannedCode": "0000000000005"},
  ],
  "customer": {
    "loyaltyCard": "..."
  }
}

Checkout Info

A signed document with mandatory price calculation and available payment methods.

Signed Checkout Info

Parameter	Type	Default	Description
`checkoutInfo`	`CheckoutInfo`		Actual Checkout Info
`signature`	`string`		Signature of the `checkoutInfo` object

Checkout Info

Parameter	Type	Default	Description
`session`	`string`		Identifier of the session
`clientID`	`string`		The ID of the client/device
`appUserID`	`string`	The ID of the appUser
`shopID`	`string`		Identifier of the shop
`shop`	`ShopInformation`		Shop details
`customer`	`Customer`		Customer details
`createdAt`	`date`		Creation date of the checkout info (RFC3339 Datetime formatted)
`availableMethods`	`string[]`		List of payment methods available for this checkout
`lineItems`	`LineItem[]`		List of the line items
`price`	`Price`		Price of the checkout
`currency`	`string`		Currency of the project

Shop Information

The Shop Information captures the details of the essential for the checkout.

Parameter	Type	Description
`externalId`	`string`	An identifier provided by external sources
`name`	`string`	The name of the shop
`email`	`string`	Email address
`phone`	`string`	Phone number
`street`	`string`	Street and number
`zip`	`string`	Postal code
`city`	`string`	City
`state`	`string`	State
`country`	`string`	Country

Line Item

A line item normaly represents a certain amount of a product. But it can also used for additional items that are indivisble from the bought product like a deposit. Further, it can be used to represent promotions like a general discount. The line items are hence typed to distinguish these cases. Also it can refer to another one through the refersTo property.

Parameter	Type	Default	Description
`id`	`string`		Identifier of the line item
`type`	`string`	default	Type of the line item (`default`, `deposit`, `promotion`)
`refersTo`	`string`	null	Line item that is related to this one (ie. if the line item represents a deposit the id of the line item wich requires it)
`sku`	`string`		SKU of the product
`amount`	`int`		Number of products / packages
`weight`	`int`	0	Weight purchased
`weightUnit`	`string`		Unit of the weight
`referenceUnit`	`string`		Reference unit for weighable item, Details: Product API: weighable products
`units`	`int`	0	Number of units in a package in case of bundle or piece product
`price`	`int`		Price of the product for single unit, piece, weightUnit, etc
`priceOrigin`	`string`		Origin of the price (`master` price from the products list, `client` the price was provided by the client)
`totalPrice`	`int`		Total price of the line item
`name`	`string`		Name of the product
`taxRate`	`string`		Tax rate as string encoded decimal
`scannedCode`	`string`		Scanned code
`saleRestriction`	`string`		Restriction for product e.g. min age

Example:

{
    "links": {
      "checkoutProcess": {
        "href": "/demo/checkout/process"
      }
    },
    "checkoutInfo" : {
      "price" : {
         "tax" : {
            "19" : 7673
         },
         "taxNet" : {
            "19" : 40382
         },
         "taxPre" : {
           "19" : 48055
         },
         "netPrice" : 40382,
         "price" : 48055
      },
      "availableMethods" : [
         "cash",
         "girocard",
         "sepa",
         "visa",
         "mastercard"
      ],
      "clientID":  "772fdd23-0161-4e3e-85d0-af2a52fbe3f7",
      "appUserID": "d7b5a85a-4186-466e-99ee-414fe93951f3",
      "shopID" : "shop-01",
      "shop": {
         "externalID": "shop-1234",
         "street": "Shop Street 3",
         "zip": "12345",
         "state": "Shop State",
         "country": "Some Country",
         "city": "Some City",
         "phone": "+4912342356",
         "email": "shop@someshop.de",
         "name": "Some Shop"
      },
      "lineItems" : [
         {
            "id": "e25bc1ee-5233-11e9-9e12-68f7286a148f",
            "type": "default",
            "totalPrice" : 798,
            "amount" : 2,
            "name" : "Kugelschreiber tarent rot",
            "price" : 399,
            "taxRate" : "19",
             "sku" : "1",
            "scannedCode": "0000000000001",
            "saleRestriction": "min_age_18"
         },
         {
            "id": "ecac5c4e-5233-11e9-b17e-68f7286a148f",
            "type": "default",
            "price" : 1099,
            "name" : "tarent logo-Cap grau",
            "totalPrice" : 1099,
            "amount" : 1,
            "taxRate" : "19",
            "sku" : "2",
            "scannedCode": "0000000000002",
            "saleRestriction": ""
         },
         {
            "id": "f660bac8-5233-11e9-a689-68f7286a148f",
            "type": "default",
            "amount" : 42,
            "totalPrice" : 46158,
            "name" : "tarent logo-Cap rot",
            "price" : 1099,
            "sku" : "3",
            "taxRate" : "19",
            "scannedCode": "0000000000003"
         }
      ],
      "currency": "EUR",
      "project" : "demo",
      "session" : "d06474fa-1584-11e8-b642-0ed5f89f718b",
      "clientID": "app-id-12345",
      "createdAt": "2018-06-19T09:59:29.245Z",
      "customer": {
        "loyaltyCard": "..."
      }
   },
   "signature" : "Dynit3mnsBnM8eA9.."
}

Create Checkout Process Request

Example:

{
    "signedCheckoutInfo" : { .. signedCheckoutInfo .. },
    "paymentMethod": "sepa",
    "paymentInformation": { .. some information depending on payment system .. }
}

Checkout Process

Process attributes:

Parameter	Type	Default	Description
`supervisorApproval`	`bool/nil`	nil	Approval by the checkout supervisor (nil=pending, true=granted, false=rejected)
`paymentApproval`	`bool/nil`	nil	Approval by the payment process (nil=pending, true=granted, false=rejected)
`aborted`	`bool`	false	Flag, if the process was aborted by the user
`checkoutInfo`	`CheckoutInfo`		The full Checkout Info object (that was provided in the creation of the process)
`pricing`	`pricing`		The Pricing information of the checkout
`paymentMethod`	`string`		A valid payment method
`paymentState`	`string`	pending	The Status of the associated payment process
`paymentInformation`	`object`	nil	Payment dependent additional information, i.e. a code to present to the user
`paymentResult`	`object`	nil	Information from payment system, i.e. transaction id, state
`modified`	`bool`	false	Flag, if the process was modified by the checkout supervisor
`createdAt`	`date`		Creation date of the process (RFC3339 Datetime formated )
`finalizedAt`	`date`		The time the process was finalized, i.e. the time it was paid
`processedOffline`	`bool`	false	Flag, if the customer was offline while creating the process
`clientID`	`string`		The ID of the client/device
`appUserID`	`string`		The ID of the appUser

Example:

{
   "links": {
      "self": {"href": "/demo/checkout/process/f42a5718-1621-11e8-b642-0ed5f89f718b"},
      "approval": {"href": "/demo/checkout/process/f42a5718-1621-11e8-b642-0ed5f89f718b/approval"},
      "payment": {"href": "/demo/checkout/payment"}
   },
   "supervisorApproval" : null,
   "paymentApproval" : null,
   "aborted" : false,
   "checkoutInfo" : { .. checkoutInfo .. },
   "paymentMethod" : "cash",
   "pricing": { .. pricing .. },
   "modified" : false,
   "processedOffline": false,
   "clientID":  "772fdd23-0161-4e3e-85d0-af2a52fbe3f7",
   "appUserID": "d7b5a85a-4186-466e-99ee-414fe93951f3"
}

Payment State

Represents the state of the payment process associated with the Checkout Process.

Possible values are:

pending (initial state): The payment is pending
processing: A payment system is currently processing the process
transferred (terminal state): The process was transferred to a payment system. But the outcome of the processing will not be communicated to the process.
successful (terminal state)
failed (terminal state)

Payment Result

The structure of the payment result depends on the payment method and the provider used. In general three cases have to be considered: Online Payment Credit Card, Online SEPA Direct Debit and Payment Terminal. In this cases the system assures that at least the described fields are present.

Payment Result: Payment Credit Card

The payment was processed online using a Credit Card, ie. Visa, Mastercard.

Parameter	Type	Description
`transactionTime`	`string`	Transation time as unix timestamp in time zone UTC
`pan`	`string`	Annonymized Primary Account
`processorApprovalCode`	`string`	Approval code of the transaction
`processorReferenceNumber`	`string`	Reference number of the transaction

Payment Result: SEPA Direct Debit

The payment was processed online using a Direct Debit transaction

Parameter	Type	Description
`transactionTime`	`string`	Transation time as unix timestamp in time zone UTC
`mandateReference`	`string`	SEPA Mandate reference
`processorApprovalCode`	`string`	Approval code of the transaction
`processorReferenceNumber`	`string`	Reference number of the transaction

Payment Result: Payment Terminal

The payment was processed using a payment terminal with the ZVT-Protocol.

Parameter	Type	Description
`time`	`string`	Transation time as encoded as RFC3339
`aid`	`string`	Authorization Code
`pan`	`string`	Primary Account Number
`paymentType`	`string`	ZVT-Payment Type

Checkout Process List

Example:

{
   "processes" : [
        {
           "links": {
              "self": {"href": "/demo/checkout/process/f42a5718-1621-11e8-b642-0ed5f89f718b"},
              "approval": {"href": "/demo/checkout/process/f42a5718-1621-11e8-b642-0ed5f89f718b/approval"},
              "payment": {"href": "/demo/checkout/payment"}
           },
           "supervisorApproval" : null,
           "paymentApproval" : null,
           "aborted" : false,
           "checkoutInfo" : { .. checkoutInfo .. },
           "paymentMethod" : "cash",
           "paymentState": "pending",
           "pricing": { .. pricing .. },
           "modified" : false
        },
        {
           "links": {
              "self": {"href": "/demo/checkout/process/f42a5718-1621-11e8-b642-xxd5f89f718b"},
              "approval": {"href": "/demo/checkout/process/f42a5718-1621-11e8-b642-xxd5f89f718b/approval"},
              "payment": {"href": "/demo/checkout/payment"}
           },
           "supervisorApproval" : null,
           "paymentApproval" : null,
           "aborted" : false,
           "checkoutInfo" : { .. checkoutInfo .. },
           "paymentMethod" : "cash",
           "paymentState": "pending",
           "pricing": { .. pricing .. },
           "modified" : false
        }
    ]
}

Pricing

Price information.

Parameter	Type	Description
`tax`	`Object`	Map of tax rates (as string encoded decimals) to the portion of the price that was taxed with this rate
`taxNet`	`Object`	Map of tax rates (as string encoded decimals) to the portion of the net price that was taxed with this rate
`taxPre`	`Object`	Map of tax rates (as string encoded decimals) sums all pre tax prices of products with this rate up
`lineItems`	`LineItem[]`	Line items of the order. For details see Checkout API: Line Item

{
   "price" : {
      "tax" : {
         "19" : 7673
      },
      "taxNet" : {
        "19" : 40382
      },
      "taxPre" : {
        "19" : 48055
      },
      "netPrice" : 40382,
      "price" : 48055
   },
   "lineItems" : [
      {
         "totalPrice" : 798,
         "amount" : 2,
         "name" : "Kugelschreiber tarent rot",
         "price" : 399,
         "taxRate" : 19,
         "sku" : "1",
         "scannedCode": "0000000000001"
      },
      {
         "price" : 1099,
         "name" : "tarent logo-Cap grau",
         "totalPrice" : 1099,
         "amount" : 1,
         "taxRate" : 19,
         "sku" : "2",
         "scannedCode": "0000000000002"
      }
   ]
}

Checkout Approval

Possible Types:

supervisor

Example:

{"type": "supervisor"}

Abort Request

Example:

{"aborted": true}

Update Pricing Request

Updates the pricing of the checkout process.

Example:

{
   "pricing" : {
      "lineItems" : [
         {
            "sku" : "1",
            "amount" : 1,
            "taxRate" : 19,
            "price" : 399,
            "totalPrice" : 399,
            "name" : "Kugelschreiber tarent rot"
         }
      ],
      "price" : {
         "price" : 399
      }
   }
}

Set Payment State Request

Valid values are:

pending
processing
successful
failed

Example:

{
   "paymentState" : "successful"
}

Create Checkout Info

POST /{project}/checkout/info

Creates a Checkout Info document with mandatory price calculation and available payment methods. This document can be used to show the real price to the user and it can be used to start a Checkout Process as input of Create Checkout Process.

Required permissions : productsRead

Request

Content-Type : application/json

Data : Cart.

Success Response `200 OK`

Content-Type : application/json

Data : Checkout Info.

Possible structured errors

More information on structured errors in General API

Type	Description
`shop_not_found`	shop for provided shopID does not exists
`bad_shop_id`	The provided `shopID` is either not present or invalid
`no_available_method`	No payment method is available
`invalid_cart_item`	One or multiple cart items are invalid. The api returns an array of lineItemErrors in `details`

LineItemError

A LineItemError gives further information on line item which caused an error.

Property	Type	Description
`sku`	`string`	SKU of the affected product
`type`	`string`	line item error types
`message`	`string`	error message

Possible line item error types:

Type	Description
`sale_stop`	product is affected by a sale stop
`product_not_found`	product with the given SKU does not exist

Example:

{
   "type": "invalid_cart_item",
   "details": [
      {
         "sku": "some-sku",
         "type": "sale_stop",
         "message": "product is excluded from sale"
      },
      {
         "sku": "some-other-sku",
         "type": "product_not_found",
         "message": "product not found"
      }
   ]
}

Create Checkout Process

POST /{project}/checkout/process

Initiate a Checkout Process.

Required permissions : productsRead and a Checkout Info

Request

Content-Type : application/json

Data : Create Checkout Process Request.

Success Response `201 Created`

Location : Get Checkout Process

Content-Type : application/json

Data : Checkout Process

Get Checkout Process

GET /{project}/checkout/process/{id}

Get the state of a Checkout Process.

Required permissions : checkoutRead for the checkout process

Success Response `200 OK`

Content-Type : application/json

Data : Checkout Process

List Checkout Processes

GET /{project}/checkout/process?shop=shopID

List all available Checkout Processes for a shop.

Parameter : shop (string) - the shop id

Required permissions : supervisor

Success Response `200 OK`

Content-Type : application/json

Data : Checkout Process List

Modify Checkout Process

PATCH /{project}/checkout/process/{id}

Modify a Checkout Process.

Aborting the Checkout Process

Required permissions : productsRead and the id of a Checkout Process

Abort Request

Mark a checkout process as aborted.

Content-Type : application/json

Data : Abort Request.

Success Response `200 OK`

Content-Type : application/json

Data : Checkout Process

Set Payment State of the Checkout Process

Required permissions : setPaymentState and the id of a Checkout Process

Set Payment State Request

Mark a checkout process as successful, failed or in process.

Content-Type : application/json

Data : Set Payment State Request.

Success Response `200 OK`

Content-Type : application/json

Data : Checkout Process

Update the Pricing of the Checkout Process

Required permissions : updatePricingCheckoutProcess and the id of a Checkout Process

Update Pricing Request

Update the pricing of the CheckoutProcess.

The provided pricing might be incomplete. This means whole line items or parts of them (like taxRate) might be missing. Also the netPrice and the tax properties are optional. This leads to the generation of incomplete orders. In this case downstream processes like the generation of receipts might not be possible or can't generate the correct results.

Content-Type : application/json

Data : Update Pricing Request.

Success Response `200 OK`

Content-Type : application/json

Data : Checkout Process

Create Checkout Process Approval

POST /{project}/checkout/process/{id}/approval

Create an approval for a Checkout Process.

Request

Content-Type : application/json

Data : Create Checkout Approval Request.

Success Response `201 Created`

Content-Type : application/json

Data : Checkout Approval.

Info operation​

Process operations​

Data Model​

Content Types​

Data Model​

Cart​

Checkout Info​

Signed Checkout Info​

Checkout Info​

Shop Information​

Line Item​

Create Checkout Process Request​

Checkout Process​

Payment State​

Payment Result​

Payment Result: Payment Credit Card​

Payment Result: SEPA Direct Debit​

Payment Result: Payment Terminal​

Checkout Process List​

Pricing​

Checkout Approval​

Abort Request​

Update Pricing Request​

Set Payment State Request​

Create Checkout Info​

Request​

Success Response 200 OK​

Possible structured errors​

LineItemError​

Create Checkout Process​

Request​

Success Response 201 Created​

Get Checkout Process​

Success Response 200 OK​

List Checkout Processes​

Success Response 200 OK​

Modify Checkout Process​

Aborting the Checkout Process​

Abort Request​

Success Response 200 OK​

Set Payment State of the Checkout Process​

Set Payment State Request​

Success Response 200 OK​

Update the Pricing of the Checkout Process​

Update Pricing Request​

Success Response 200 OK​

Create Checkout Process Approval​

Request​

Success Response 201 Created​

Info operation

Process operations

Data Model

Content Types

Data Model

Cart

Checkout Info

Signed Checkout Info

Checkout Info

Shop Information

Line Item

Create Checkout Process Request

Checkout Process

Payment State

Payment Result

Payment Result: Payment Credit Card

Payment Result: SEPA Direct Debit

Payment Result: Payment Terminal

Checkout Process List

Pricing

Checkout Approval

Abort Request

Update Pricing Request

Set Payment State Request

Create Checkout Info

Request

Success Response `200 OK`

Possible structured errors

LineItemError

Create Checkout Process

Request

Success Response `201 Created`

Get Checkout Process

Success Response `200 OK`

List Checkout Processes

Success Response `200 OK`

Modify Checkout Process

Aborting the Checkout Process

Abort Request

Success Response `200 OK`

Set Payment State of the Checkout Process

Set Payment State Request

Success Response `200 OK`

Update the Pricing of the Checkout Process

Update Pricing Request

Success Response `200 OK`

Create Checkout Process Approval

Request

Success Response `201 Created`