# POST /api/hostedpaymentpages/sessions/{sessionId}/reconcile-completions

Recomputes a reusable link's completion count from its own completions.

Corrects the link when the stored count and the completions disagree.
The repair for a count that drifted. The link's count is advanced after a payer's completion
is consumed and handed back when a consume is reversed, and neither write can be made to
fail loudly: the payer-facing consume proceeds rather than refusing a payment over a counter
write, and the release side is best-effort. Either can leave the count disagreeing with the
completions, which are the record of what actually happened.


Deliberately separate from the completions listing rather than folded into it, so reading a
link's payments never writes to the link. Safe to call on a link that is already correct:
the response says whether anything changed, and nothing is written when nothing did. A link
whose completions have passed their retention window is reported untouched rather than reset
to zero. Refused on a link that is not reusable, with the error code's HTTP status published
in the error catalogue rather than declared here, for the reason the pause action gives.

**Operation ID:** `hppSessionReconcileCompletions`

## Authorization

Requires: HostedPaymentPage.HppSessions, HostedPaymentPage.HppSessions.Create, merchant scope.

Requires API key scope: `transactions:write`

Required permissions:
- `HostedPaymentPage.HppSessions`
- `HostedPaymentPage.HppSessions.Create`

## Parameters

| Name | In | Required | Type | Description |
| --- | --- | --- | --- | --- |
| sessionId | path | yes | string(uuid) | The reusable link to reconcile. |
| suppressNulls | query | no | boolean | If true, omit properties with null values. |

## Responses

### 200

OK

**Content type:** `application/json`

Schema: [`HppSessionCompletionReconciliationDto`](https://devportal.demo.winkpg.io/docs/api/models/HppSessionCompletionReconciliationDto.md)

Properties:
- `sessionId` (string(uuid)): The reusable link that was reconciled.
- `changed` (boolean): Whether the link was actually written to. `false` means the stored count and status  already agreed with the children, which is the expected answer.
- `previousCompletionCount` (integer(int32)): The completion count the link carried before the reconciliation.
- `completionCount` (integer(int32)): The completion count the link carries now. Equal to  `previousCompletionCount` when nothing needed correcting.
- `consumedCompletions` (integer(int32)): How many of the link's completions are consumed, which is the number the count was  reconciled to.
- `totalCompletions` (integer(int32)): How many completions the link has at all. Zero means the reconciliation was a no-op by  design: children share the link's retention TTL, so an empty partition is not evidence the  count should be zero.
- `previousStatus` ([HppSessionStatus](https://devportal.demo.winkpg.io/docs/api/models/HppSessionStatus.md)): The link's status before the reconciliation.
  Values:
  - `Pending`: The session has been created and is awaiting use by a customer. Also the status a session returns to when a premature consume is released: a submission that was rejected by pure request-shape validation before the orchestrator was invoked leaves the link usable, so the payer can correct their input and resubmit on the same link (see Consumed).
  - `Consumed`: The session has been consumed by a transaction submission. Terminal in practice: the only exit is the narrow release back to Pending performed by HppSession.ReleaseConsume, which requires that the session carries no OrchestratorDispatchedAt marker, that the consuming transaction id is still the one recorded, and that no vault token was minted. Once a submission reaches the orchestrator the marker is durable and the session stays Consumed regardless of the outcome, including a decline. Submit paths additionally validate the request BEFORE consuming, so a rejected request usually never spends the link in the first place; the release covers the rules that can only run inside the create.
  - `Revoked`: The session has been manually revoked by an administrator.
  - `Cancelled`: The session was cancelled by the parent page via the iframe two-way command channel Distinct from Revoked (admin-initiated) for clarity in audit + reporting: same terminal effect (session can no longer be consumed).
  - `Completed`: A reusable link has taken every completion it was capped at, so it accepts no further payers. Terminal, and reachable only on a reusable session: a single-use link spends itself through Consumed instead, and a reusable one is never Consumed because its per-payer consume state lives on its HppSessionCompletion children rather than on the parent. A reusable link created with no cap never reaches this status; it stays payable until it is revoked, cancelled or expires.
- `status` ([HppSessionStatus](https://devportal.demo.winkpg.io/docs/api/models/HppSessionStatus.md)): The link's status now. Differs from `previousStatus` only when the corrected  count crossed the link's cap in one direction or the other.
  Values:
  - `Pending`: The session has been created and is awaiting use by a customer. Also the status a session returns to when a premature consume is released: a submission that was rejected by pure request-shape validation before the orchestrator was invoked leaves the link usable, so the payer can correct their input and resubmit on the same link (see Consumed).
  - `Consumed`: The session has been consumed by a transaction submission. Terminal in practice: the only exit is the narrow release back to Pending performed by HppSession.ReleaseConsume, which requires that the session carries no OrchestratorDispatchedAt marker, that the consuming transaction id is still the one recorded, and that no vault token was minted. Once a submission reaches the orchestrator the marker is durable and the session stays Consumed regardless of the outcome, including a decline. Submit paths additionally validate the request BEFORE consuming, so a rejected request usually never spends the link in the first place; the release covers the rules that can only run inside the create.
  - `Revoked`: The session has been manually revoked by an administrator.
  - `Cancelled`: The session was cancelled by the parent page via the iframe two-way command channel Distinct from Revoked (admin-initiated) for clarity in audit + reporting: same terminal effect (session can no longer be consumed).
  - `Completed`: A reusable link has taken every completion it was capped at, so it accepts no further payers. Terminal, and reachable only on a reusable session: a single-use link spends itself through Consumed instead, and a reusable one is never Consumed because its per-payer consume state lives on its HppSessionCompletion children rather than on the parent. A reusable link created with no cap never reaches this status; it stays payable until it is revoked, cancelled or expires.
- `remainingCompletions` (integer(int32)): How many completions the cap still allows, or `null` on an uncapped link. (nullable)

### 403

Forbidden

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

### 401

Unauthorized

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

### 400

Bad Request

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

_Example: Request failed validation_

One or more fields were rejected before any rule ran. error.code is null on the envelope and the causes are in validationErrors, one entry per failure. An entry carries code when the validator declared a publishable one, and memberPaths when the full path says more than members does (an element inside a collection, for example). Both keys are omitted when they would add nothing.

```json
{
  "error": {
    "code": "null",
    "message": "Your request is not valid!",
    "details": "The following errors were detected during validation.",
    "data": {
      "correlationId": "0123456789abcdef0123456789abcdef"
    },
    "validationErrors": [
      {
        "message": "'Amount' must be greater than 0.",
        "members": [
          "amount"
        ]
      },
      {
        "message": "The card has expired.",
        "members": [
          "expirationDate"
        ],
        "code": "CardData:CardExpired"
      },
      {
        "message": "'Value' must not be empty.",
        "members": [
          "value"
        ],
        "memberPaths": [
          "customFields[2].value"
        ]
      }
    ]
  }
}
```

### 404

Not Found

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

_Example: Resource not found_

The id in the path names no record the caller can see. Most resources answer with a null error.code and a message naming the resource type and the id; a resource that publishes a not-found code in the catalog above carries it in error.code instead, so check for one before matching on the message.

```json
{
  "error": {
    "code": "null",
    "message": "There is no entity Transaction with id = 7d1f3a52-0c4e-4b8a-9e21-5a6b7c8d9e00!",
    "details": "null",
    "data": {
      "correlationId": "0123456789abcdef0123456789abcdef"
    },
    "validationErrors": "null"
  }
}
```

### 501

Not Implemented

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

### 500

Internal Server Error

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

### default

The request failed. The body carries the standard error envelope: a machine-readable `error.code`, a human-readable `error.message`, and `error.validationErrors` when the failure was a validation rejection. The [error reference](https://devportal.demo.winkpg.io/docs/errors.md) lists the values `error.code` can take.

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

_Example: Business rule refused the request_

The request was understood and rejected by a platform rule. This is the shape that carries a code from the catalog above, so branch on error.code rather than on the message text. The HTTP status is the one listed against the code.

```json
{
  "error": {
    "code": "Transactions:OperationNotAllowed",
    "message": "The operation 'Void' is not allowed on a Sale transaction with result 'Approved' and settlement state 'Settled'.",
    "details": "null",
    "data": {
      "correlationId": "0123456789abcdef0123456789abcdef"
    },
    "validationErrors": "null"
  }
}
```

### 429

The request was refused because a rate limit was exceeded, or because something a later retry can clear stopped it. A rate limit refusal carries an `application/problem+json` body: wait at least the interval `Retry-After` names before retrying, then back off. Limits are tuned per deployment, so read the allowance from the response headers rather than assuming a fixed ceiling. Any other refusal carries the standard error envelope as `application/json`, and its `error.code` names the cause.

**Content type:** `application/problem+json`

Schema: [`RateLimitProblemDetails`](https://devportal.demo.winkpg.io/docs/api/models/RateLimitProblemDetails.md)

Properties:
- `type` (string) required: The problem type identifier. Always the same value: the failure is the status code itself,  so there is no sub-type for a caller to branch on. (nullable)
- `title` (string) required: A short, human-readable summary of the problem type. (nullable)
- `status` (integer(int32)) required: The HTTP status code, repeated in the body as the problem-details format defines.
- `detail` (string) required: A human-readable explanation of this occurrence of the problem. (nullable)
- `retryAfterSeconds` (integer(int32)) required: How long to wait before retrying, in whole seconds, carrying the same figure as the  `Retry-After` header. Always at least one: a value of zero would invite an immediate  retry that is certain to be rejected again.

**Content type:** `application/json`

Schema: [`RemoteServiceErrorResponse`](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorResponse.md)

Properties:
- `error` ([RemoteServiceErrorInfo](https://devportal.demo.winkpg.io/docs/api/models/RemoteServiceErrorInfo.md))

## Example request

Every block below sends the same request. Replace {{BASE_URL}} with the address of the API you are calling and {{API_KEY}} with your own key.

### cURL

```bash
curl -X POST "{{BASE_URL}}/api/hostedpaymentpages/sessions/{sessionId}/reconcile-completions" \
  -H "api-key: {{API_KEY}}"
```

### PowerShell

```powershell
$headers = @{
    'api-key' = '{{API_KEY}}'
}

$response = Invoke-RestMethod -Method POST -Uri '{{BASE_URL}}/api/hostedpaymentpages/sessions/{sessionId}/reconcile-completions' `
    -Headers $headers
```

### TypeScript (SDK)

```bash
npm install @winkpg/winkpg-api
```

```typescript
import { Configuration, HostedPaymentPagesApi } from '@winkpg/winkpg-api';

const api = new HostedPaymentPagesApi(new Configuration({
  basePath: '{{BASE_URL}}',
  apiKey: '{{API_KEY}}',
}));

const { data } = await api.hppSessionReconcileCompletions("3fa85f64-5717-4562-b3fc-2c963f66afa6");
```

### TypeScript (raw HTTP)

```typescript
const response = await fetch('{{BASE_URL}}/api/hostedpaymentpages/sessions/{sessionId}/reconcile-completions', {
  method: 'POST',
  headers: {
    "api-key": "{{API_KEY}}",
  },
});

const data = await response.json();
```

### C# (SDK)

```bash
dotnet add package WinkPg.Api.Client
```

```csharp
using WinkPg.Api.Client.Api;
using WinkPg.Api.Client.Client;

var config = new Configuration { BasePath = "{{BASE_URL}}" };
config.AddApiKey("api-key", "{{API_KEY}}");

var api = new HostedPaymentPagesApi(config);
var result = await api.HppSessionReconcileCompletionsAsync(Guid.Parse("3fa85f64-5717-4562-b3fc-2c963f66afa6"));
```

### C# (raw HTTP)

```csharp
using var http = new HttpClient { BaseAddress = new Uri("{{BASE_URL}}") };

var request = new HttpRequestMessage(new HttpMethod("POST"), "/api/hostedpaymentpages/sessions/{sessionId}/reconcile-completions");
request.Headers.Add("api-key", "{{API_KEY}}");

var response = await http.SendAsync(request);
response.EnsureSuccessStatusCode();
var json = await response.Content.ReadAsStringAsync();
```

### Python (SDK)

```bash
pip install winkpg-api
```

```python
import winkpg_api

configuration = winkpg_api.Configuration(host="{{BASE_URL}}")
configuration.api_key["ApiKey"] = "{{API_KEY}}"

with winkpg_api.ApiClient(configuration) as client:
    api = winkpg_api.HostedPaymentPagesApi(client)
    result = api.hpp_session_reconcile_completions("3fa85f64-5717-4562-b3fc-2c963f66afa6")
```

### Python (raw HTTP)

```bash
pip install requests
```

```python
import requests

headers = {
    "api-key": "{{API_KEY}}",
}

response = requests.request(
    "POST",
    "{{BASE_URL}}/api/hostedpaymentpages/sessions/{sessionId}/reconcile-completions",
    headers=headers,
)
response.raise_for_status()
data = response.json()
```

## See also

- [All documentation](https://devportal.demo.winkpg.io/llms.txt): the machine-readable index of every public page on this site.
