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This article introduces how to back up your key share once you have successfully generated it.

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Prerequisites

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Verify the root extended public key

You must first check the local key share information before backup and ensure that the root extended public key displayed in Cobo Portal matches the one shown in the TSS Node log.
  1. Navigate to the corresponding vault page and click on the Key Share Management icon.
A Key Share Management icon
  1. You can see the root extended public keys in the Key Share Management page.
A root extended public key
  1. Execute the following command to check the root extended public keys in the TSS Node log: 
    sudo ./tss-node.sh info group
    Example: 
    $ sudo ./tss-node.sh info group
Container started: bc5e54bc4675a46b3edc9bbabc76ebb7d3918260fe8aeb09bbd60375ae26438c
Wait a few seconds ..................
INFO[2022-12-14T09:51:28+08:00] Total number of groups: 2, from db/secrets.db
INFO[2023-01-16T09:04:12+08:00] Group info: 
    Group ID: OoQGkknsPdPjLCmSuuSf
    Created Time: 2023-01-09 17:42:21.391854 +0800 HKT
    Root Extended Public Key: xpub661MyMwAqRbcGNFddDqGveSvN9jr1n1GMGFypyhqn34oKyMw9bvrych636CDwgBbLjdLgQRoQtmqPucPb1pZQVBZq3tuXXTQX8wP3JMWAak
    ChainCode: 0xb74087d551e44ef8d3a1270accb1977fd373c29fe6e235bc681c59a2137e1334
    Share ID: 914259450665435839517029445012417071559
    Share Public Key: 0x023633989378b01c2e66d5fd70666101546a310aaab2c08c7b5813be371d438c0d
    Type: 1
    Curve: secp256k1
    Threshold: 2
    Local Node ID: cobo2Jitd83uNFZmGnvs8c4Bs1TUNjVVeBQmc82a4KpLFqdbLs
    Other Node IDs: [coboBP97RpWKD2WGKhUUtZ1iu6uyWL7MjY4S8MpTUHDiwvRni cobok1nJ4P8DL1mU5SDEzh8QDA5FzdSg7gdkAZKUWK4NuviS4]
    Participants: 3
      (1) Node ID: coboBP97RpWKD2WGKhUUtZ1iu6uyWL7MjY4S8MpTUHDiwvRni
          Share ID: 751341643106997665517612415491881522730
          Share Public Key: 0x02ad8728dce88aa210645cff8dea474114376796d81e4b4df76bfa3ea847131b57
      (2) Node ID: cobo2Jitd83uNFZmGnvs8c4Bs1TUNjVVeBQmc82a4KpLFqdbLs
          Share ID: 914259450665435839517029445012417071559
          Share Public Key: 0x023633989378b01c2e66d5fd70666101546a310aaab2c08c7b5813be371d438c0d
      (3) Node ID: cobok1nJ4P8DL1mU5SDEzh8QDA5FzdSg7gdkAZKUWK4NuviS4
          Share ID: 997493310528521058725882883276549657588
          Share Public Key: 0x02a233d2d37297bcfc3092ea65997a29b72931b5ca343db5cd608c85a306be5994
    Verify that the root extended public key shown in the above log matches the one displayed in Cobo Portal. Otherwise, the backup data will be invalid.

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Back up your key share

After verification, please back up the following data:
  1. The encrypted database file located at db/secrets.db.
  2. The database encryption password, which is the password you set during the TSS Node initialization process.
Both items are critical components of your key share. Losing either one will result in the complete loss of access to your private key. It is crucial to back up both items securely, but they must NOT be stored together, as this would be equivalent to keeping a key with its lock, which compromises security.