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OpenAPI Specification

openapi: 3.0.3
info:
  title: LBank Spot Market REST Account API
  description: Public REST endpoints providing real-time and historical market data for all LBank spot trading pairs. All endpoints are unauthenticated and suitable for market data aggregators, dashboards, and trading bots.
  version: 1.0.0
  contact:
    url: https://www.lbank.com/en-US/docs/
  termsOfService: https://www.lbank.com/en-US/agreement/
servers:
- url: https://api.lbkex.com
  description: LBank REST API (primary)
- url: https://api.lbkex.net
  description: LBank REST API (secondary)
- url: https://api.lbank.info
  description: LBank REST API (tertiary)
tags:
- name: Account
  description: Account balance and transaction history
paths:
  /v1/user_info.do:
    post:
      operationId: getUserInfo
      summary: Get user asset information
      description: Returns the authenticated user's account balances including total assets, frozen amounts, and available balances per currency.
      tags:
      - Account
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              $ref: '#/components/schemas/AuthRequest'
      responses:
        '200':
          description: User asset information
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UserInfoResponse'
      security:
      - ApiKeyAuth: []
  /v1/transaction_history.do:
    post:
      operationId: getTransactionHistory
      summary: Get past transaction history
      description: Returns historical trade fill records for the authenticated user, optionally filtered by date range and pair.
      tags:
      - Account
      requestBody:
        required: true
        content:
          application/x-www-form-urlencoded:
            schema:
              allOf:
              - $ref: '#/components/schemas/AuthRequest'
              - type: object
                required:
                - symbol
                properties:
                  symbol:
                    type: string
                    description: Trading pair
                  type:
                    type: string
                    enum:
                    - buy
                    - sell
                    description: Order direction filter
                  start_date:
                    type: string
                    description: Start date (yyyy-mm-dd, max today, default yesterday)
                  end_date:
                    type: string
                    description: End date (yyyy-mm-dd, max today, default today). Max window is 2 days.
                  from:
                    type: string
                    description: Initial transaction ID for pagination
                  direct:
                    type: string
                    enum:
                    - next
                    - prev
                    description: 'Query direction: next (ascending by time) or prev (descending)'
                    default: next
                  size:
                    type: string
                    description: Number of records (default 100)
      responses:
        '200':
          description: Historical transaction records
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionDetailResponse'
      security:
      - ApiKeyAuth: []
components:
  schemas:
    AuthRequest:
      type: object
      required:
      - api_key
      - sign
      properties:
        api_key:
          type: string
          description: User's API key
        sign:
          type: string
          description: Request signature (RSA or HmacSHA256)
    TransactionRecord:
      type: object
      properties:
        txUuid:
          type: string
          description: Trade ID
        orderUuid:
          type: string
          description: Order ID
        tradeType:
          type: string
          enum:
          - buy
          - sell
        dealTime:
          type: integer
          description: Trade timestamp (milliseconds)
        dealPrice:
          type: number
          description: Fill price
        dealQuantity:
          type: number
          description: Fill quantity
        dealVolumePrice:
          type: number
          description: Aggregated fill value (price * quantity)
        tradeFee:
          type: number
          description: Transaction fee amount
        tradeFeeRate:
          type: number
          description: Transaction fee rate
    UserInfoResponse:
      type: object
      properties:
        result:
          type: string
          enum:
          - 'true'
          - 'false'
        info:
          type: object
          properties:
            freeze:
              type: object
              description: Frozen balances by currency
              additionalProperties:
                type: number
            asset:
              type: object
              properties:
                net:
                  type: number
                  description: Total net asset value
            free:
              type: object
              description: Available balances by currency
              additionalProperties:
                type: number
    TransactionDetailResponse:
      type: object
      properties:
        result:
          type: string
          enum:
          - 'true'
          - 'false'
        transaction:
          type: array
          items:
            $ref: '#/components/schemas/TransactionRecord'