# 7 Data Structures
## 7.1 Data Elements
### 7.1.1 eSignature operation
| Name | Type | Description |
| ------------------ | --------- | ------------------------------------------------------------------------------------------------------------ |
| SignatureId | String | Unique Signature Token for signature operations. This can be a random String as well. |
| SignatureType | Enum | Can be ONETIME or SCD |
| SignatureFormat | Enum | Signature format that should be applied. Can be XAdES, CAdES, ASIC, JWS, PAdES |
| Hash | String | Hash to be signed in hex characters or base64 |
| HashType | Enum | Hash type - SHA2-256, SHA2-384, SHA2-512, SHA3-256, SHA3-384, SHA3-512, BLAKE2B |
| DisplayData | String | Text string to be shown on user’s device (SCD). Limited to 256 characters. |
| Certificate | String | X509 Certificate in PEM format |
| RequestTimestamp | Timestamp | Timestamp of the request |
| Signature | Signature | Signature in base64 format |
| SignatureTimestamp | String | rfc3161 asn.1 in base64 |
| ResponseTimestmap | Timestamp | Timestamp of the response |
| Status | Enum | Request status enum. Can be OK, ERROR |
| StatusDesc | String | Description of status |
| CallbackURL | URL | URL to call back with results |
| Pseudonym | String | Unique pseudonym for the user that is bound to the specific SCD/Key id combo. We can call this as Key Handle |
### 7.1.2 eSignature operation header
| Name | Type | Description |
| ------------ | ------ | -------------------------------------- |
| AuthToken | String | JWT Token from ID Building Block |
| PaymentToken | String | Jwt Token from Payments Building Block |
### 7.1.3 User's Device Onboarding
| Name | Type | Description |
| ----------------- | --------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| AuthToken | String | JWT Token from ID Building Block |
| PaymentToken | String | JWT Token from Payments Building Block |
| CSR | String | Certificate signing request PKCS#10 in PEM format |
| SCDType | Enum | The SCD type that is used by user. Can be of REMOTE\_SCD\_APP\_APPLE, REMOTE\_SCD\_APP\_ANDROID, REMOTE\_SCD\_APP\_SE\_APPLE, REMOTE\_SCD\_APP\_SE\_ANDROID, REMOTE\_SCD\_SIM, REMOTE\_SCD\_ESIM,
REMOTE\_SCD\_SMARTID
|
| SCDKeyId | Number | Key id for case the SCD has multiple certificates |
| SCDRemoteId | String | Remote identifier for the SCD communication, for REMOTE\_SCD\_APP\* devices it is push ID, for REMOTE\_SCD\_ESIM/ REMOTE\_SCD\_SIM it is msisdn
For
REMOTE\_SCD\_SMARTID it is citizen id
|
| Pseudonym | String | Unique pseudonym for the user that is bound to the specific SCD/Key id combo. We can call this as Key Handle |
| CertReqTimestamp | Timestamp | Timestamp for the certificate request |
| CertId | String | Unique identifier for the certificate, SCD, Key id combo |
| Certificate | String | X509 Certificate in PEM format in ACTIVE status |
| CertRespTimestamp | Timestamp | Timestamp for the Certificate response |
| Status | Enum | Request status. Can be of of OK, ERROR |
| StatusDesc | String | Description of status |