Common Data Types

This document describes common data structures used throughout the FinHub API. All endpoints follow these conventions unless explicitly documented otherwise.

Purpose: Standard data structures used across all FinHub API endpoints.Use these schemas for consistent request/response formatting.

BaseResponse<T>

All API responses are wrapped in this standard structure:

interface BaseResponse<T> {
  code: number        // HTTP status code (200, 201, 400, 404, etc.)
  message: string     // Human-readable message
  data: T            // The actual response payload (generic type)
}

Success Response Example

{
  "code": 200,
  "message": "Success",
  "data": {
    "userId": "5887c98c-b5b1-4234-b819-a4987f54aa77",
    "email": "user@example.com",
    "status": "ACTIVE"
  }
}

Error Response Example

{
  "code": 400,
  "message": "Prepared order not found: prepared-order-123",
  "data": {
    "error": "Prepared order not found: prepared-order-123"
  }
}

Important: Never expect direct data in responses. All responses are wrapped in BaseResponse.Incorrect:

{ "userId": "123" }

Correct:

{ "code": 200, "message": "Success", "data": { "userId": "123" } }

AmountDto

Financial amounts use scaled integers to avoid floating-point precision issues.

AmountDto {
  value: string       // Scaled integer as string (e.g., "5000000")
  scale: number       // Number of decimal places (e.g., 2)
  currency?: string   // ISO 4217 currency code (e.g., "EUR")
}

How It Works

The value field contains the amount multiplied by 10^scale:

€50,000.00 = { "value": "5000000", "scale": 2, "currency": "EUR" }
€100.00 = { "value": "10000", "scale": 2, "currency": "EUR" }
€0.01 = { "value": "1", "scale": 2, "currency": "EUR" }

Examples

Request with Amount

{
  "amount": {
    "value": "5000000",
    "scale": 2,
    "currency": "EUR"
  },
  "description": "Incoming SEPA transfer"
}

Response with Amount

{
  "code": 200,
  "message": "Success",
  "data": {
    "preparedOrderId": "666f111b-20fd-4756-b610-3ee24938e96a",
    "summary": {
      "amount": 100,
      "currency": "EUR",
      "totalAmount": 100
    }
  }
}

Why Scaled Integers?Floating-point numbers (like 1000.00) can cause precision errors in financial calculations. Scaled integers ensure exact arithmetic:

Addition: "1000" + "500" = "1500"
Subtraction: "1000" - "500" = "500"
Comparison: "1000" > "500" = true

Common Mistake:Incorrect (using float):

{
  "amount": {
    "value": 1000.00,
    "currency": "EUR"
  }
}

Correct (using scaled integer):

{
  "amount": {
    "value": "100000",
    "scale": 2,
    "currency": "EUR"
  }
}

AddressDto

Physical address structure used for customer registration and KYC.

AddressDto {
  id?: string                // Optional ID for existing addresses
  type: AddressType          // "HOME" | "WORK" | "BILLING" | "SHIPPING"
  street: string             // Street address
  city: string               // City name
  postalCode: string         // Postal/ZIP code
  country: string            // ISO 3166-1 alpha-2 country code
  state?: string             // State/Province (optional)
  building?: string          // Building name/number (optional)
  apartment?: string         // Apartment/Unit number (optional)
  isPrimary: boolean         // Whether this is the primary address
}

Example

{
  "id": "6vsvy01jbzo",
  "type": "HOME",
  "street": "123 Medium Risk Street",
  "city": "Compliance City",
  "postalCode": "12345",
  "country": "LT",
  "isPrimary": true
}

Address Types

Type	Description
`HOME`	Residential address
`WORK`	Business/office address
`BILLING`	Billing address for invoices
`SHIPPING`	Delivery/shipping address

ContactDto

Contact information (email, phone, etc.) for customers.

ContactDto {
  id?: string                // Optional ID for existing contacts
  type: ContactType          // "EMAIL" | "PHONE" | "MOBILE" | "FAX"
  value: string              // Contact value (email address, phone number, etc.)
  isPrimary: boolean         // Whether this is the primary contact method
  verified?: boolean         // Whether this contact has been verified (optional)
}

Example

{
  "id": "g4dh2ch831",
  "type": "EMAIL",
  "value": "marcus.jensen@example.com",
  "isPrimary": true,
  "verified": true
}

Contact Types

Type	Description	Format Example
`EMAIL`	Email address	`user@example.com`
`PHONE`	Landline phone	`+37060012345`
`MOBILE`	Mobile phone	`+37067890124`
`FAX`	Fax number	`+37060012399`

PersonDto

Personal information for individual customers, directors, shareholders, etc.

PersonDto {
  id?: string                // Optional person ID
  firstName: string          // Given name(s)
  lastName: string           // Family name(s)
  middleName?: string        // Middle name(s) (optional)
  email: string              // Primary email address
  dateOfBirth: string        // ISO 8601 date (YYYY-MM-DD)
  nationality: string        // ISO 3166-1 alpha-2 country code
  gender?: Gender            // "MALE" | "FEMALE" | "OTHER" (optional)
  placeOfBirth?: string      // Birth city/location (optional)
  fullName?: string          // Full name display (optional)
  addresses?: AddressDto[]   // Array of addresses
  contacts?: ContactDto[]    // Array of contact methods
  documents?: DocumentDto[]  // Array of identity documents (optional)
}

Example

{
  "id": "the2r6zaa6",
  "firstName": "Marcus",
  "lastName": "Jensen",
  "email": "marcus.jensen@example.com",
  "dateOfBirth": "1990-05-15",
  "nationality": "LT",
  "gender": "MALE",
  "placeOfBirth": "Vilnius",
  "fullName": "Marcus Jensen",
  "addresses": [
    {
      "type": "HOME",
      "street": "123 Medium Risk Street",
      "city": "Compliance City",
      "postalCode": "12345",
      "country": "LT",
      "isPrimary": true
    }
  ],
  "contacts": [
    {
      "type": "EMAIL",
      "value": "marcus.jensen@example.com",
      "isPrimary": true
    }
  ]
}

TelephoneNumberDto

Telephone number with metadata (used for organizations).

TelephoneNumberDto {
  number: string             // E.164 format phone number
  country: string            // ISO 3166-1 alpha-2 country code
  phoneType: number          // 0=UNKNOWN, 1=MOBILE, 2=LANDLINE
  operator?: string          // Telecom operator (optional)
  purpose?: string           // Purpose (e.g., "personal", "business")
  isPrimary: boolean         // Whether this is the primary number
}

Example

{
  "number": "+37060012345",
  "country": "LT",
  "phoneType": 1,
  "operator": "Telia",
  "purpose": "personal",
  "isPrimary": true
}

Standard HTTP Headers

Request Headers

All API requests should include these headers:

Header	Required	Description
`X-Tenant-ID`	Yes	Tenant identifier
`Authorization`	Yes	Bearer token from session login
`Content-Type`	Yes	`application/json`
`Accept`	Optional	`application/json` (default)
`X-Session-Id`	Conditional	Required for transfer operations
`X-User-ID`	Conditional	Required for some admin operations
`X-User-Roles`	Conditional	Comma-separated roles for authorization

Example Request Headers

curl -X POST "https://api.finhub.cloud/api/v2.1/customer/individual/registration" \
  -H "X-Tenant-ID: 97e7ff29-15f3-49ef-9681-3bbfcce4f6cd" \
  -H "Authorization: Bearer eyJ0eXAiOiJKV1QiLCJh..." \
  -H "Content-Type: application/json" \
  -H "Accept: application/json" \
  -d '{ ... }'

Standard Error Responses

400 Bad Request

{
  "code": 400,
  "message": "Missing required role 'ADMIN_USER' for BUSINESS_TYPE_CLIENT_TO_TENANT organization. At least one employee must have this role.",
  "data": {
    "error": "Missing required role 'ADMIN_USER'"
  }
}

403 Forbidden

{
  "code": 403,
  "message": "Access denied"
}

404 Not Found

{
  "code": 404,
  "message": "Unable to find matching target resource method",
  "data": {
    "error": "Unable to find matching target resource method"
  }
}

500 Internal Server Error

{
  "code": 500,
  "message": "Internal server error",
  "data": {
    "error": "An unexpected error occurred"
  }
}

Enums Reference

Gender

enum Gender {
  MALE = "MALE",
  FEMALE = "FEMALE",
  OTHER = "OTHER"
}

AddressType

enum AddressType {
  HOME = "HOME",
  WORK = "WORK",
  BILLING = "BILLING",
  SHIPPING = "SHIPPING"
}

ContactType

enum ContactType {
  EMAIL = "EMAIL",
  PHONE = "PHONE",
  MOBILE = "MOBILE",
  FAX = "FAX"
}

CustomerType

enum CustomerType {
  CT_PERSON = "CT_PERSON",
  CT_ORGANIZATION = "CT_ORGANIZATION"
}

CustomerStatus

enum CustomerStatus {
  CS_REGISTRATION_COMPLETED = "CS_REGISTRATION_COMPLETED",
  CS_PENDING_ACTIVATION = "CS_PENDING_ACTIVATION",
  CS_ACTIVE = "CS_ACTIVE",
  CS_SUSPENDED = "CS_SUSPENDED",
  CS_CLOSED = "CS_CLOSED"
}

Date and Time Formats

All dates and times use ISO 8601 format:

Type	Format	Example
Date	`YYYY-MM-DD`	`2026-01-13`
DateTime	`YYYY-MM-DDTHH:mm:ss.SSSZ`	`2026-01-13T19:21:47.631Z`
DateTime (with timezone)	`YYYY-MM-DDTHH:mm:ss.SSS+HH:mm`	`2026-01-12T22:21:56.903+03:00`

Examples

{
  "dateOfBirth": "1990-05-15",
  "createdAt": "2026-01-12T19:21:59.019243Z",
  "expiresAt": "2027-01-12T22:21:53.254059600"
}

Pagination (Future)

Pagination is not yet implemented in v2.1. All list endpoints currently return complete results. Future versions will support cursor-based pagination.

Validation Rules

Email Format

Must match RFC 5322 standard
Example: user@example.com

Phone Number Format

Must use E.164 format
Example: +37060012345

Country Codes

Must use ISO 3166-1 alpha-2 (2-letter codes)
Examples: LT, GB, DE, US

Currency Codes

Must use ISO 4217 (3-letter codes)
Examples: EUR, USD, GBP

Customer APIs

Customer registration and management

Financial Operations

Transfers, payments, and wallet operations

Verification & Compliance

KYC, AML, and compliance workflows

​Common Data Types

​BaseResponse<T>

​Success Response Example

​Error Response Example

​AmountDto

​How It Works

​Examples

​Request with Amount

​Response with Amount

​AddressDto

​Example

​Address Types

​ContactDto

​Example

​Contact Types

​PersonDto

​Example

​TelephoneNumberDto

​Example

​Standard HTTP Headers

​Request Headers

​Example Request Headers

​Standard Error Responses

​400 Bad Request

​403 Forbidden

​404 Not Found

​500 Internal Server Error

​Enums Reference

​Gender

​AddressType

​ContactType

​CustomerType

​CustomerStatus

​Date and Time Formats

​Examples

​Pagination (Future)

​Validation Rules

​Email Format

​Phone Number Format

​Country Codes

​Currency Codes

​Related Resources

Customer APIs

Financial Operations

Verification & Compliance

Common Data Types

BaseResponse<T>

Success Response Example

Error Response Example

AmountDto

How It Works

Examples

Request with Amount

Response with Amount

AddressDto

Example

Address Types

ContactDto

Example

Contact Types

PersonDto

Example

TelephoneNumberDto

Example

Standard HTTP Headers

Request Headers

Example Request Headers

Standard Error Responses

400 Bad Request

403 Forbidden

404 Not Found

500 Internal Server Error

Enums Reference

Gender

AddressType

ContactType

CustomerType

CustomerStatus

Date and Time Formats

Examples

Pagination (Future)

Validation Rules

Email Format

Phone Number Format

Country Codes

Currency Codes

Related Resources