CoinDCX Streaming Socket.IO API

asyncapi: '2.6.0'
info:
  title: CoinDCX Streaming Socket.IO API
  version: '1.0.0'
  description: >-
    AsyncAPI 2.6 description of CoinDCX's public and authenticated streaming
    interface. CoinDCX exposes a Socket.IO endpoint at https://stream.coindcx.com
    that delivers real-time orderbook, trade, price, price-statistics, and
    candlestick data for spot and futures markets, plus authenticated channels
    for the signed-in user's balance, order, trade, and (for futures) position
    updates.

    Channel subscription is driven by client-emitted "join" and "leave" events
    that reference a string channelName. Public market channels follow the
    pattern <EXCHANGE>-<BASE>_<QUOTE>@<topic> (for example B-BTC_USDT@orderbook)
    where the EXCHANGE prefix is one of B, I, HB, or KC. Candlestick channels
    use the form candlestick@<EXCHANGE>-<BASE>_<QUOTE>_<interval>. The
    authenticated user-data channel name is "coindcx" and the join payload
    must include a JSON body together with an HMAC-SHA256 authSignature
    computed with the API secret over that body, along with the apiKey.

    Only Socket.IO client version 2.4.0 is supported by the server.
  contact:
    name: CoinDCX API Support
    url: https://docs.coindcx.com/
  license:
    name: CoinDCX API Terms
    url: https://coindcx.com/terms-of-use
defaultContentType: application/json
servers:
  production:
    url: stream.coindcx.com
    protocol: wss
    description: >-
      Production Socket.IO streaming endpoint. Use the Socket.IO client
      protocol (only [email protected] is supported) over secure
      WebSocket transport.
channels:
  join:
    description: >-
      Client-emitted Socket.IO event used to subscribe to a channel. For
      public market channels the payload is a string such as
      "B-BTC_USDT@orderbook". For the authenticated user-data channel the
      payload is a JSON object containing channelName "coindcx", a stringified
      body with at least a timestamp, an HMAC-SHA256 authSignature of that
      body computed with the API secret, and the apiKey.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    publish:
      operationId: joinChannel
      summary: Subscribe to a public or authenticated streaming channel.
      message:
        oneOf:
          - $ref: '#/components/messages/PublicJoin'
          - $ref: '#/components/messages/AuthenticatedJoin'
  leave:
    description: >-
      Client-emitted Socket.IO event used to unsubscribe from a previously
      joined channel. The payload is the same channelName string passed to
      join.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    publish:
      operationId: leaveChannel
      summary: Unsubscribe from a previously joined channel.
      message:
        $ref: '#/components/messages/Leave'
  depth-snapshot:
    description: >-
      Full orderbook snapshot for a market channel of the form
      <EXCHANGE>-<BASE>_<QUOTE>@orderbook.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receiveDepthSnapshot
      summary: Receive an orderbook snapshot event.
      message:
        $ref: '#/components/messages/DepthSnapshot'
  depth-update:
    description: >-
      Incremental orderbook update for a market channel of the form
      <EXCHANGE>-<BASE>_<QUOTE>@orderbook. Updates should be applied on top
      of the most recent depth-snapshot for the same channel.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receiveDepthUpdate
      summary: Receive an incremental orderbook update event.
      message:
        $ref: '#/components/messages/DepthUpdate'
  new-trade:
    description: >-
      Incoming trade notification for a market channel of the form
      <EXCHANGE>-<BASE>_<QUOTE>@trades.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receiveNewTrade
      summary: Receive a public trade event for a market.
      message:
        $ref: '#/components/messages/NewTrade'
  currentPrices:
    description: >-
      Real-time price feed for a market channel of the form
      <EXCHANGE>-<BASE>_<QUOTE>@prices.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receiveCurrentPrices
      summary: Receive a current-prices event for a market.
      message:
        $ref: '#/components/messages/CurrentPrices'
  price-change:
    description: >-
      Last traded price (LTP) movement for a market channel of the form
      <EXCHANGE>-<BASE>_<QUOTE>@prices.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receivePriceChange
      summary: Receive a last-traded-price change event for a market.
      message:
        $ref: '#/components/messages/PriceChange'
  price-stats:
    description: >-
      Rolling price statistics for a market channel of the form
      <EXCHANGE>-<BASE>_<QUOTE>@prices-stats.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receivePriceStats
      summary: Receive a price-statistics event for a market.
      message:
        $ref: '#/components/messages/PriceStats'
  candlestick:
    description: >-
      Candlestick (OHLCV) updates for a candlestick channel of the form
      candlestick@<EXCHANGE>-<BASE>_<QUOTE>_<interval> (for example
      candlestick@B-BTC_USDT_1m).
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receiveCandlestick
      summary: Receive a candlestick event for a market and interval.
      message:
        $ref: '#/components/messages/Candlestick'
  balance-update:
    description: >-
      Authenticated user-data event delivered on the "coindcx" channel
      whenever the signed-in user's wallet balance changes.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receiveBalanceUpdate
      summary: Receive a balance update for the authenticated user.
      message:
        $ref: '#/components/messages/BalanceUpdate'
  order-update:
    description: >-
      Authenticated user-data event delivered on the "coindcx" channel for
      lifecycle changes to the signed-in user's spot or futures orders.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receiveOrderUpdate
      summary: Receive an order lifecycle update for the authenticated user.
      message:
        $ref: '#/components/messages/OrderUpdate'
  trade-update:
    description: >-
      Authenticated user-data event delivered on the "coindcx" channel for
      the signed-in user's executed trades (fills).
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receiveTradeUpdate
      summary: Receive an executed trade event for the authenticated user.
      message:
        $ref: '#/components/messages/TradeUpdate'
  position-update:
    description: >-
      Authenticated user-data event delivered on the "coindcx" channel for
      changes to the signed-in user's futures positions.
    bindings:
      ws:
        bindingVersion: '0.1.0'
    subscribe:
      operationId: receivePositionUpdate
      summary: Receive a futures position update for the authenticated user.
      message:
        $ref: '#/components/messages/PositionUpdate'
components:
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: user
      description: >-
        API key issued in the CoinDCX user dashboard. Passed in the join
        payload for the "coindcx" channel as the apiKey field.
    hmacAuth:
      type: symmetricEncryption
      description: >-
        HMAC-SHA256 signature of the join payload body, computed with the
        API secret and hex-encoded. Passed in the join payload for the
        "coindcx" channel as the authSignature field.
  messages:
    PublicJoin:
      name: PublicJoin
      title: Public Channel Join Request
      summary: >-
        String channel name used to subscribe to a public market channel,
        for example B-BTC_USDT@orderbook, B-BTC_USDT@trades,
        B-BTC_USDT@prices, B-BTC_USDT@prices-stats, or
        candlestick@B-BTC_USDT_1m.
      contentType: application/json
      payload:
        type: string
        example: B-BTC_USDT@orderbook
    AuthenticatedJoin:
      name: AuthenticatedJoin
      title: Authenticated Channel Join Request
      summary: >-
        Join payload for the authenticated user-data channel. The body field
        is a JSON-stringified object containing at least a timestamp; the
        authSignature is the hex HMAC-SHA256 of that string computed with
        the API secret.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/AuthenticatedJoin'
    Leave:
      name: Leave
      title: Channel Leave Request
      summary: Channel name string previously passed to join.
      contentType: application/json
      payload:
        type: string
        example: B-BTC_USDT@orderbook
    DepthSnapshot:
      name: DepthSnapshot
      title: Orderbook Snapshot
      summary: Full orderbook snapshot for a market.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/DepthSnapshot'
    DepthUpdate:
      name: DepthUpdate
      title: Orderbook Incremental Update
      summary: Incremental orderbook update for a market.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/DepthUpdate'
    NewTrade:
      name: NewTrade
      title: Public Trade
      summary: Public trade event for a market.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/NewTrade'
    CurrentPrices:
      name: CurrentPrices
      title: Current Prices
      summary: Current-price event for a market.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/CurrentPrices'
    PriceChange:
      name: PriceChange
      title: Last Traded Price Change
      summary: Last traded price movement for a market.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/PriceChange'
    PriceStats:
      name: PriceStats
      title: Price Statistics
      summary: Rolling price statistics for a market.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/PriceStats'
    Candlestick:
      name: Candlestick
      title: Candlestick
      summary: Candlestick (OHLCV) update for a market and interval.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/Candlestick'
    BalanceUpdate:
      name: BalanceUpdate
      title: Balance Update
      summary: Authenticated wallet balance change event.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/BalanceUpdate'
    OrderUpdate:
      name: OrderUpdate
      title: Order Update
      summary: Authenticated order lifecycle event.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/OrderUpdate'
    TradeUpdate:
      name: TradeUpdate
      title: Trade Update
      summary: Authenticated executed trade event.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/TradeUpdate'
    PositionUpdate:
      name: PositionUpdate
      title: Position Update
      summary: Authenticated futures position change event.
      contentType: application/json
      payload:
        $ref: '#/components/schemas/PositionUpdate'
  schemas:
    AuthenticatedJoin:
      type: object
      required:
        - channelName
        - authSignature
        - apiKey
      properties:
        channelName:
          type: string
          description: >-
            Authenticated user-data channel name. Use "coindcx" to subscribe
            to balance, order, and trade updates for the signed-in user.
          example: coindcx
        body:
          type: string
          description: >-
            JSON-stringified payload that was signed. Must contain at least
            a numeric timestamp in milliseconds.
          example: '{"timestamp":1700000000000}'
        authSignature:
          type: string
          description: >-
            Hex-encoded HMAC-SHA256 of the body string, computed using the
            API secret as the HMAC key.
        apiKey:
          type: string
          description: CoinDCX API key issued in the user dashboard.
    DepthSnapshot:
      type: object
      description: >-
        Full orderbook snapshot for the subscribed market channel. The
        documented topic suffix is @orderbook and the documented exchange
        prefixes are B, I, HB, and KC.
      properties:
        channel:
          type: string
          description: Channel name the snapshot was emitted on.
          example: B-BTC_USDT@orderbook
      additionalProperties: true
    DepthUpdate:
      type: object
      description: >-
        Incremental orderbook update for the subscribed market channel.
        Apply on top of the most recent depth-snapshot for the same channel.
      properties:
        channel:
          type: string
          example: B-BTC_USDT@orderbook
      additionalProperties: true
    NewTrade:
      type: object
      description: Public trade event for the subscribed market channel.
      properties:
        channel:
          type: string
          example: B-BTC_USDT@trades
      additionalProperties: true
    CurrentPrices:
      type: object
      description: Current-prices event for the subscribed market channel.
      properties:
        channel:
          type: string
          example: B-BTC_USDT@prices
      additionalProperties: true
    PriceChange:
      type: object
      description: >-
        Last traded price (LTP) movement event for the subscribed market
        channel.
      properties:
        channel:
          type: string
          example: B-BTC_USDT@prices
      additionalProperties: true
    PriceStats:
      type: object
      description: >-
        Rolling price-statistics event for the subscribed market channel
        (topic suffix @prices-stats).
      properties:
        channel:
          type: string
          example: B-BTC_USDT@prices-stats
      additionalProperties: true
    Candlestick:
      type: object
      description: >-
        Candlestick (OHLCV) event for a candlestick channel of the form
        candlestick@<EXCHANGE>-<BASE>_<QUOTE>_<interval>.
      properties:
        channel:
          type: string
          example: candlestick@B-BTC_USDT_1m
      additionalProperties: true
    BalanceUpdate:
      type: object
      description: >-
        Authenticated wallet balance change event delivered on the "coindcx"
        channel.
      additionalProperties: true
    OrderUpdate:
      type: object
      description: >-
        Authenticated order lifecycle event delivered on the "coindcx"
        channel.
      additionalProperties: true
    TradeUpdate:
      type: object
      description: >-
        Authenticated executed trade event delivered on the "coindcx"
        channel.
      additionalProperties: true
    PositionUpdate:
      type: object
      description: >-
        Authenticated futures position change event delivered on the
        "coindcx" channel.
      additionalProperties: true