implementing pre-authorization code flow for OpenId4VCI

README.md

@@ -33,12 +33,13 @@ The library provides the following functionality:
 - Document issuance
     - [x] Support for OpenId4VCI Draft 13 document issuance
         - [x] Authorization Code Flow
-        - [ ] Pre-authorization Code Flow
+      - [x] Pre-authorization Code Flow
         - [x] Support for mso_mdoc format
         - [ ] Support for sd-jwt-vc format
       - [x] Support credential offer
       - [x] Support for DPoP JWT in authorization
       - [x] Support for JWT and CWT proof types
+        - [ ] Support for deferred issuing
 - Proximity document presentation
     - [x] Support for ISO-18013-5 device retrieval
         - [x] QR device engagement
@@ -454,6 +455,7 @@ EudiWallet.resolveDocumentOffer(offerUri) { result ->
             // display the offer's data to the user
             val issuerName = offer.issuerName
             val offeredDocuments: List<OfferedDocument> = offer.offeredDocuments
+            val txCodeSpec: Offer.TxCodeSpec? = offer.txCodeSpec // information about pre-authorized flow
             // ...
         }
         is OfferResult.Failure -> {
@@ -546,11 +548,23 @@ val onIssueEvent = OnIssueEvent { event ->
     }
 }
 
-EudiWallet.issueDocumentByDocType("eu.europa.ec.eudiw.pid.1", onIssueEvent)
+EudiWallet.issueDocumentByDocType(
+    docType = "eu.europa.ec.eudiw.pid.1",
+    txCode = "<Transaction Code for Pre-authorized flow>", // if transaction code is provided
+    onEvent = onIssueEvent
+)
 // or
-EudiWallet.issueDocumentByOfferUri("https://issuer.com/?credential_offer=...", onIssueEvent)
+EudiWallet.issueDocumentByOfferUri(
+    offerUri = "https://issuer.com/?credential_offer=...",
+    txCode = "<Transaction Code for Pre-authorized flow>", // if transaction code is provided
+    onEvent = onIssueEvent
+)
 // or given a resolved offer object
-EudiWallet.issueDocumentByOffer(offer, onIssueEvent)
+EudiWallet.issueDocumentByOffer(
+    offer = offer,
+    txCode = "<Transaction Code for Pre-authorized flow>", // if transaction code is provided
+    onEvent = onIssueEvent
+)
 ```
 
 There's also available for `issueDocumentByDocType`, `issueDocumentByOfferUri` and `issueDocumentByOffer` methods to
@@ -559,7 +573,10 @@ If the `executor` parameter is null, the callback will be executed on the main t
 
 ```kotlin
 val executor = Executors.newSingleThreadExecutor()
-EudiWallet.issueDocumentByDocType("eu.europa.ec.eudiw.pid.1", executor) { event ->
+EudiWallet.issueDocumentByDocType(
+    docType = "eu.europa.ec.eudiw.pid.1",
+    executor = executor
+) { event ->
     // ...
 }
 ```
@@ -578,8 +595,8 @@ Also, the redirect uri declared in the OpenId4VCI configuration must be declared
     <application>
         <!-- rest of manifest -->
         <activity
-            android:name=".MainActivity"
-            android:exported="true">
+                android:name=".MainActivity"
+                android:exported="true">
             <!-- rest of activity -->
             <intent-filter>
                 <action android:name="android.intent.action.VIEW"/>
@@ -621,6 +638,25 @@ class SomeActivity : AppCompatActivity() {
 }
 ```
 
+##### Pre-Authorization code flow
+
+When Issuer supports the pre-authorization code flow, the resolved offer will also contain the corresponding
+information. Specifically, the `txCodeSpec` field in the `Offer` object will contain:
+
+- The input mode, whether it is NUMERIC or TEXT
+- The expected length of the input
+- The description of the input
+
+From the user's perspective, the application must provide a way to input the transaction code.
+
+When the transaction code is provided, the issuance process can be resumed by calling any of the following methods:
+
+- `EudiWallet.issueDocumentByDocType`
+- `EudiWallet.issueDocumentByOfferUri`
+- `EudiWallet.issueDocumentByOffer`
+
+passing the transaction code as in the `txCode` parameter.
+
 ### Transfer documents
 
 The library supports the following 3 ways to transfer documents:

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-offered-document/as-pair.md

@@ -3,7 +3,7 @@
 # asPair
 
 [androidJvm]\
-fun [asPair](as-pair.md)(): [Pair](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-pair/index.html)
+open fun [asPair](as-pair.md)(): [Pair](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-pair/index.html)
 <[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html), [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)
 >
 

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-offered-document/doc-type.md

@@ -3,4 +3,4 @@
 # docType
 
 [androidJvm]\
-val [docType](doc-type.md): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)
+abstract val [docType](doc-type.md): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-offered-document/index.md

@@ -3,20 +3,19 @@
 # OfferedDocument
 
 [androidJvm]\
-data class [OfferedDocument](index.md)
+interface [OfferedDocument](index.md)
 
 An item to be issued.
 
 ## Functions
 
-| Name                     | Summary                                                                                                                                                                                                                                                                                                                                                       |
-|--------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| [asPair](as-pair.md)     | [androidJvm]<br>fun [asPair](as-pair.md)(): [Pair](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-pair/index.html)&lt;[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html), [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)&gt;<br>Converts this item to a pair of name and document type. |
-| [toString](to-string.md) | [androidJvm]<br>open override fun [toString](to-string.md)(): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)                                                                                                                                                                                                                |
+| Name                 | Summary                                                                                                                                                                                                                                                                                                                                                            |
+|----------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [asPair](as-pair.md) | [androidJvm]<br>open fun [asPair](as-pair.md)(): [Pair](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-pair/index.html)&lt;[String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html), [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)&gt;<br>Converts this item to a pair of name and document type. |
 
 ## Properties
 
-| Name                   | Summary                                                                                                                                                       |
-|------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| [docType](doc-type.md) | [androidJvm]<br>val [docType](doc-type.md): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)<br>the document type of the item |
-| [name](name.md)        | [androidJvm]<br>val [name](name.md): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)<br>the name of the item                 |
+| Name                   | Summary                                                                                                                                                                |
+|------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [docType](doc-type.md) | [androidJvm]<br>abstract val [docType](doc-type.md): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)<br>the document type of the item |
+| [name](name.md)        | [androidJvm]<br>abstract val [name](name.md): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)<br>the name of the item                 |

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-offered-document/name.md

@@ -3,4 +3,4 @@
 # name
 
 [androidJvm]\
-val [name](name.md): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)
+abstract val [name](name.md): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-tx-code-spec/-input-mode/-n-u-m-e-r-i-c/index.md

@@ -0,0 +1,13 @@
+//[wallet-core](../../../../../../index.md)/[eu.europa.ec.eudi.wallet.issue.openid4vci](../../../../index.md)/[Offer](../../../index.md)/[TxCodeSpec](../../index.md)/[InputMode](../index.md)/[NUMERIC](index.md)
+
+# NUMERIC
+
+[androidJvm]\
+[NUMERIC](index.md)
+
+## Properties
+
+| Name                                                                                                                  | Summary                                                                                                                                                                                                                  |
+|-----------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [name](../../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-372974862%2FProperties%2F1615067946)    | [androidJvm]<br>val [name](../../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-372974862%2FProperties%2F1615067946): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) |
+| [ordinal](../../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-739389684%2FProperties%2F1615067946) | [androidJvm]<br>val [ordinal](../../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-739389684%2FProperties%2F1615067946): [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)    |

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-tx-code-spec/-input-mode/-t-e-x-t/index.md

@@ -0,0 +1,13 @@
+//[wallet-core](../../../../../../index.md)/[eu.europa.ec.eudi.wallet.issue.openid4vci](../../../../index.md)/[Offer](../../../index.md)/[TxCodeSpec](../../index.md)/[InputMode](../index.md)/[TEXT](index.md)
+
+# TEXT
+
+[androidJvm]\
+[TEXT](index.md)
+
+## Properties
+
+| Name                                                                                                                  | Summary                                                                                                                                                                                                                  |
+|-----------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [name](../../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-372974862%2FProperties%2F1615067946)    | [androidJvm]<br>val [name](../../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-372974862%2FProperties%2F1615067946): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) |
+| [ordinal](../../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-739389684%2FProperties%2F1615067946) | [androidJvm]<br>val [ordinal](../../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-739389684%2FProperties%2F1615067946): [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)    |

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-tx-code-spec/-input-mode/index.md

@@ -0,0 +1,30 @@
+//[wallet-core](../../../../../index.md)/[eu.europa.ec.eudi.wallet.issue.openid4vci](../../../index.md)/[Offer](../../index.md)/[TxCodeSpec](../index.md)/[InputMode](index.md)
+
+# InputMode
+
+[androidJvm]\
+enum [InputMode](index.md) : [Enum](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-enum/index.html)
+<[Offer.TxCodeSpec.InputMode](index.md)>
+
+The input mode for the transaction code.
+
+## Entries
+
+|                                    |                                                    |
+|------------------------------------|----------------------------------------------------|
+| [NUMERIC](-n-u-m-e-r-i-c/index.md) | [androidJvm]<br>[NUMERIC](-n-u-m-e-r-i-c/index.md) |
+| [TEXT](-t-e-x-t/index.md)          | [androidJvm]<br>[TEXT](-t-e-x-t/index.md)          |
+
+## Functions
+
+| Name                   | Summary                                                                                                                                                                                                                                                                                                                                                                                         |
+|------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [valueOf](value-of.md) | [androidJvm]<br>fun [valueOf](value-of.md)(value: [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)): [Offer.TxCodeSpec.InputMode](index.md)<br>Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.) |
+| [values](values.md)    | [androidJvm]<br>fun [values](values.md)(): [Array](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-array/index.html)&lt;[Offer.TxCodeSpec.InputMode](index.md)&gt;<br>Returns an array containing the constants of this enum type, in the order they're declared.                                                                                                                          |
+
+## Properties
+
+| Name                                                                                                               | Summary                                                                                                                                                                                                               |
+|--------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [name](../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-372974862%2FProperties%2F1615067946)    | [androidJvm]<br>val [name](../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-372974862%2FProperties%2F1615067946): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html) |
+| [ordinal](../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-739389684%2FProperties%2F1615067946) | [androidJvm]<br>val [ordinal](../../../-open-id4-vci-manager/-config/-proof-type/-c-w-t/index.md#-739389684%2FProperties%2F1615067946): [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)    |

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-tx-code-spec/-input-mode/value-of.md

@@ -0,0 +1,16 @@
+//[wallet-core](../../../../../index.md)/[eu.europa.ec.eudi.wallet.issue.openid4vci](../../../index.md)/[Offer](../../index.md)/[TxCodeSpec](../index.md)/[InputMode](index.md)/[valueOf](value-of.md)
+
+# valueOf
+
+[androidJvm]\
+fun [valueOf](value-of.md)(
+value: [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)): [Offer.TxCodeSpec.InputMode](index.md)
+
+Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to
+declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
+
+#### Throws
+
+|                                                                                                                        |                                                           |
+|------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------|
+| [IllegalArgumentException](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-illegal-argument-exception/index.html) | if this enum type has no constant with the specified name |

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-tx-code-spec/-input-mode/values.md

@@ -0,0 +1,11 @@
+//[wallet-core](../../../../../index.md)/[eu.europa.ec.eudi.wallet.issue.openid4vci](../../../index.md)/[Offer](../../index.md)/[TxCodeSpec](../index.md)/[InputMode](index.md)/[values](values.md)
+
+# values
+
+[androidJvm]\
+fun [values](values.md)(): [Array](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-array/index.html)
+<[Offer.TxCodeSpec.InputMode](index.md)>
+
+Returns an array containing the constants of this enum type, in the order they're declared.
+
+This method may be used to iterate over the constants.

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-tx-code-spec/-tx-code-spec.md

@@ -0,0 +1,8 @@
+//[wallet-core](../../../../index.md)/[eu.europa.ec.eudi.wallet.issue.openid4vci](../../index.md)/[Offer](../index.md)/[TxCodeSpec](index.md)/[TxCodeSpec](-tx-code-spec.md)
+
+# TxCodeSpec
+
+[androidJvm]\
+constructor(inputMode: [Offer.TxCodeSpec.InputMode](-input-mode/index.md) = InputMode.NUMERIC,
+length: [Int](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-int/index.html)?,
+description: [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? = null)

docs/wallet-core/eu.europa.ec.eudi.wallet.issue.openid4vci/-offer/-tx-code-spec/description.md

@@ -0,0 +1,7 @@
+//[wallet-core](../../../../index.md)/[eu.europa.ec.eudi.wallet.issue.openid4vci](../../index.md)/[Offer](../index.md)/[TxCodeSpec](index.md)/[description](description.md)
+
+# description
+
+[androidJvm]\
+val [description](description.md): [String](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)? =
+null