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    API reference

    Start vote checkout

    Validates campaign and nominee, initializes the existing vote payment and reuses the durable operation on retries; the server records completed votes.

    POSThttps://api.sparkglim.net/api/white-label/v1/votes/initialize

    Access model

    Access model
    Server-side Organization HMAC
    Required scope
    payments:write
    Documented availability
    Implemented in source

    Availability is verified from source, not a live production guarantee.

    Private signing stays on your server. API Version 1 uses signature format v2; it is not API v2.

    Headers

    NameTypeValidation
    x-white-label-domainRequired

    Verified website hostname used to resolve the approved organization account and bind this request.

    stringValidation: verified HTTPS hostname.
    x-white-label-key-idRequired

    Identifier extracted from the single issued Private Key value; never send its secret in this header.

    stringValidation: issued private key internal identifier.
    x-white-label-signature-versionRequired

    Selects the domain-bound signing format; API routes remain Version 1.

    stringValidation: 2.
    x-white-label-timestampRequired

    Request signing time in milliseconds, checked against the server clock to reject stale requests.

    stringValidation: 13 digit milliseconds; within five minutes.
    x-white-label-nonceRequired

    Fresh random signing value recorded by the server to reject replay of a signed request.

    stringValidation: fresh 16–128 [A-Za-z0-9_-].
    x-white-label-signatureRequired

    HMAC-SHA256 of the canonical domain, idempotency key, campaign credential, timestamp, nonce, method, path, sorted query and exact body hash.

    stringValidation: lowercase hexadecimal HMAC-SHA256.
    x-white-label-campaign-keyOptional

    Optional complete Campaign Key that narrows a private request to the same authorized campaign.

    stringValidation: complete optional scoped keyId:secret.
    X-Idempotency-KeyRequired

    Stable business-operation identity reused on retries with unchanged request details; different details under the same key are rejected.

    stringValidation: 16–128 [A-Za-z0-9_-].

    Request

    NameTypeValidation
    campaignIdRequired

    Existing campaign record within the caller’s account and any narrower campaign credential.

    stringValidation: UUID.
    participantIdRequired

    The nominee selected within this campaign; approval and campaign rules are checked by the server.

    stringValidation: UUID.
    voteCountRequired

    Number of votes requested for the selected nominee; SparkGlim Server determines the valid price and records completed votes.

    integerValidation: 1–100.
    phoneNumberRequired

    Participant contact phone; required payment channels and campaign rules may require a valid international number.

    stringValidation: 8–32.
    callbackUrlRequired

    Return destination accepted by the existing integration contract; never proof that a payment succeeded.

    stringValidation: URL.
    emailOptional

    Contact email used by the configured campaign or account workflow; never a credential granting access by itself.

    string|nullValidation: email.
    channelOptional

    Delivery or integration channel supported by this operation and the account’s enabled configuration.

    enumValidation: web | ussd | telegram | whatsapp.
    payment_channelOptional

    Optional channel preference; only methods enabled for the real selling country, currency and merchant may be used.

    enumValidation: enabled checkout method.
    metadataOptional

    Additional JSON metadata accepted by the documented schema; it never overrides authorization, prices or account ownership.

    objectValidation: JSON object.

    Request

    Examples describe the contract and are not executed. Use authorized test records; never paste a real secret into these pages.

    POST /api/white-label/v1/votes/initialize
    http
    POST /api/white-label/v1/votes/initialize HTTP/1.1
    Host: api.sparkglim.net
    x-white-label-domain: events.example.com
    x-white-label-key-id: <ISSUED_KEY_ID>
    x-white-label-signature-version: 2
    x-white-label-timestamp: <FRESH_MILLISECONDS>
    x-white-label-nonce: <FRESH_SIGNING_NONCE>
    x-white-label-signature: <SERVER_GENERATED_SIGNATURE>
    X-Idempotency-Key: example_stable_operation_0001
    Content-Type: application/json
    
    {
      "campaignId": "11111111-1111-4111-8111-111111111111",
      "participantId": "33333333-3333-4333-8333-333333333333",
      "voteCount": 1,
      "phoneNumber": "+233200000000",
      "callbackUrl": "https://events.example.com/payment-return"
    }

    Response

    Success response · HTTP 200
    json
    {
      "success": true,
      "data": {
        "authorization_url": "https://checkout.sparkglim.net/gh/<SERVER_REFERENCE>",
        "reference": "<SERVER_REFERENCE>"
      },
      "requestId": "wlapi_example"
    }
    Error response · HTTP 400
    json
    {
      "success": false,
      "error": "<ERROR_MESSAGE>",
      "requestId": "wlapi_example"
    }

    Validation, permissions, unavailable records and temporary service failures use the handler’s HTTP status and error payload.

    Limits & retries

    Organization limiter: 120 requests per key and 300 per IP per window; honor Retry-After and X-RateLimit headers.

    Source compatibility

    Authorized operations require account-specific testing.

    • server/src/api/router.ts
    • server/src/api/routes/white-label.ts
    • server/src/white-label/auth.ts
    • server/src/white-label/schemas.ts
    • server/src/white-label/organization-service.ts
    • server/src/white-label/service.ts