​
What are holder groups?

With MPC technology, private key shares are individually generated within separate secure environments, encrypted, and divided amongst multiple parties. A set of key shares is referred to as a holder group. There are three types of holder groups: Main Group, Signing Group, and Recovery Group. The Main Group is the first set of key shares you create before using MPC Wallets. It will be used to create both Signing Groups and Recovery Groups.
To ensure the safety and recoverability of your assets, it is recommended to create at least one Signing Group and one Recovery Group in addition to the Main Group. It is strongly recommended that the same private key share holder (the same TSS Node ID) should not belong to different types of key share holder groups simultaneously, such as both the Main Group and the Signing Group. If this situation occurs, please ensure that there is more than one Signing Group.
Main GroupSigning GroupRecovery Group
Primary Purposes
  1. Sign transactions (if you have not created Signing Groups)
  2. Create Signing Groups and Recovery Groups
Sign transactions
  1. Create a new Main Group (if your Main Group and the backup copy are lost or compromised)
  2. Recover the whole private key
Required / OptionalRequiredOptionalOptional
Threshold2/2 (You and Cobo each hold one key share, and both are required to sign)2/2 (You and Cobo each hold one key share, and both are required to sign)With Cobo Participation:
2/3 (Cobo holds one key share, and the remaining two key shares are held either entirely by you or jointly by you and a third party. Only two key shares are required to sign.)

Without Cobo Participation
2/2 (Cobo does not hold any key shares. The two key shares are held either entirely by you or jointly by you and a third party. Both key shares are required to sign.)
Max Quantity per Vault11 or more1 (recommended) or more
Feel free to share your feedback to improve our documentation!