Create Ask

With asks, sellers offer to sell a specific set of EACs with a specific volume for a specific price. Users can define the volume and price when creating the ask. Asks are tied directly to the EACs that the seller owns and that are in the seller’s Exchange user account (see Deposit process). Every EAC in the system is represented by the “asset” data structure that holds the EAC information like device ID and generation time. An ask is tied to one specific asset which means that it can only contain certificates from one device and a specific generation time frame. Users can only create asks for asset volumes that are currently in the active part of their exchange user account. The one-to-one connection between ask and asset ensures that sellers can only offer EACs that they actually own and have locked on the Exchange.

By creating an ask, the specified EACs are offered for sale and the order becomes visible on the Exchange. The corresponding asset volumes are moved to the locked part of the Exchange user account. Locking the asset volume ensures that the EACs cannot be withdrawn from the exchange or offered for sale in a second ask. As a result, all buyers on the Exchange can be sure on a technical level that asks are backed by the correct amount of EACs. 

The ask that appears on the Exchange only includes price, volume, and underlying EAC information. It does not disclose any information about the user that created the bid. All orders that are created on the Exchange are anonymous. This is possible because the Exchange operator keeps all the ownership information in the back-end and order matching is done through the operator’s system. 

Asks that are not bought or matched can be canceled. Canceling an ask moves the offered asset value back to the active part of the exchange user account. The underlying EACs can now be withdrawn again or be used to create another bid. Canceled asks can also be reactivated but only if the matching asset volume is available in the user’s Exchange account. Asks cannot be updated. To change parts of the ask like the price, the ask has to be canceled and a new ask has to be created.


  • Every ask has to be connected to exactly one renewable energy device

  • The ask volume cannot be larger than the asset volume in the active part of the Exchange user account

  • Once created, the ask has to appear on the Exchange without disclosing any user information

  • The asset volume corresponding to the ask has to be moved to the locked part of the Exchange user account

  • Only asks that have not been matched or bought can be canceled

  • An ask can only be reactivated if the user has a matching amount of asset volume in the active part of the user Exchange account