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Get random integers or doubles from the hizi.io certified RNG
POST
/getRandomResult
Conditional. Returns random integers or doubles within a given
range from the hizi.io certified RNG.
getInts includes max. getDoubles excludes max.
Required only when the game logic runs inside the hizi.io RGS and
must obtain its randomness from hizi.io for compliance — direct
game-engine integrations hosted by hizi.io, or a partner RGS hosted
within the hizi.io RGS ("RGS inception").
A classic RGS-to-RGS integration does not call this endpoint. If
your RGS runs on your own infrastructure with your own certified (e.g.
provably-fair) RNG, keep using it and pass its results in the
rngResult fields of startGameRound, addWin and the other round
calls. Your certification is entirely yours; hizi.io is not involved,
provides no certification suite for it, and no part of it expects
/getRandomResult calls from such an integration.
Authorizations
V2AuthId
Game provider ID assigned by hizi.io (Hinterzimmer). Identifies which
shared secret the signature must be verified against. Mandatory on
every game engine / RGS call.
Type
API Key (header: X-H-AUTH-ID)
V2Signature
HMAC signature of the request. OpenAPI cannot express a computed
signature, so the scheme is modelled as an apiKey header; the value
is derived per request as follows.
You need a shared secret, which you can retrieve by logging in to the
hizi.io backoffice with your credentials. The signature is a
base64-encoded SHA-256 HMAC digest of a defined set of request
parameters, joined with a hash character (#). This allows the secret
to be shared without ever being sent in the request. A timestamp
(X-H-TIMESTAMP) must also be supplied as a request header and is part
of the signed data.
Outbound (you → hizi.io RGS) — the fields signed are the
serialised JSON body and the timestamp:
X-H-AUTH-SIG = base64(
HMAC_SHA256( secret, [ JSON.stringify(body), X-H-TIMESTAMP ].join('#') )
)
See the Signing appendix for a complete
reference implementation.
Inbound (hizi.io RGS → your backendQueue) — same primitive, but
the RGS signs a fixed, per-endpoint ordered list of scalar fields
and the body is not hashed. The secret is used both as the HMAC key
and as the first element of the signed string:
X-H-AUTH-SIG = base64( HMAC_SHA256( secret, fields.join('#') ) )
| endpoint | fields (in order) |
|---|---|
GET /getGameConfiguration |
[ secret, X-H-AUTH-ID, X-H-TIMESTAMP, currency ] |
POST /getGameResult |
[ secret, X-H-AUTH-ID, X-H-TIMESTAMP, gameRound ] |
A wrong signature is reported as HTTP 401 / error code 1001
(SIGNATUREWRONG) and must not be retried.
The header family is shared with the Operator API, which documents the
same base64/SHA-256-HMAC/#-joined construction; the set of signed
fields differs per API and per direction, so do not assume a signer
written for one is reusable for the other without checking the field
list.
Type
API Key (header: X-H-AUTH-SIG)
V2Timestamp
ISO 8601 timestamp of the request (e.g. 2023-01-26T11:28:21.429Z).
Mandatory, and included in the signed data of X-H-AUTH-SIG.
Type
API Key (header: X-H-TIMESTAMP)
Parameters
Header Parameters
X-Request-Id*
Unique ID identifying the call in the logs. Documented as a mandatory
request header for all game engine / RGS calls.
Note: the reference implementation in the
Signing appendix additionally sets
X-Response-Id (a fresh UUID) and, when relaying a request,
X-Forwarded-Response-Id.
Type
Requiredstring
Example
"8c00b93dd861405cbeb7c14fded1e72a"Request Body
application/json
JSON "token": "string", "rngEndPoint": "getDoubles", "rngPayload": { "count": 0, "min": 0, "max": 0 }
{
}
Responses
The requested random values. Note that the published
V2_GameAPIRngReply type declares rngRequestId, but the
documented example response does not include it.
application/json
JSON "tokenData": { "operatorId": "string", "playerId": "string", "gameId": "string", "mode": "string", "currency": "EUR", "currentToken": "string", "gameRound": "ff85e29cb4414c89a89829c8411dacc2", "walletMode": "string", "language": "DE", "currencyMultiplier": 1, "device": "string", "commonDraw": "string" }, "values": [ 0 ], "rngRequestId": "string"
{
}