Cobo MPC Recovery Kits

Cobo MPC WaaS provides Hard Key Recovery for disaster recovery. The tool named cobo-mpc-recovery-tool in this repository can reconstruct the MPC private key that corresponds to the Cobo MPC wallet.

Binary archives are published at https://github.com/CoboCustody/cobo-mpc-recovery-kits/releases

Building the source

Building binary from the source in local environment, instead of using published binary archives

• Go 1.23 is required. Manually install Go, please click here

• Clone the repository:

git clone https://github.com/CoboCustody/cobo-mpc-recovery-kits.git

• Enter the directory

cd cobo-mpc-recovery-kits

• Build cobo-mpc-recovery-tool

make tool

Binary executable found in the build directory

Commands

Recovery command

Reconstruct all MPC key shares in TSS recovery group files, and derive the child private keys of all wallet addresses under the Cobo MPC wallet

cobo-mpc-recovery-tool [flags]

flags	Description
csv-file	address csv file, contains HD derivation paths
csv-output-dir	address csv output dir, derive keys file output in this directory (default "recovery")
group-id	recovery group id
recovery-group-files	TSS recovery group files, such as recovery/recovery-secrets-node1-time1,recovery/recovery-secrets-node2-time2
paths	key HD derivation paths
show-root-private-key	show TSS root private key

Verify command

Verify all TSS recovery group files are valid

cobo-mpc-recovery-tool verify [flags]

flags	Description
group-id	recovery group id
recovery-group-files	TSS recovery group files, such as recovery/recovery-secrets-node1-time1,recovery/recovery-secrets-node2-time2

Derive command

Derive the child public key and addresses based on the paths and token

cobo-mpc-recovery-tool derive [flags]

flags	Description
key	extended root key
paths	key HD derivation paths
token	token

Running

• Prerequisites

  • Acquire TSS recovery group files (JSON format) that contain exported MPC key shares.
  • Passphrase of each TSS recovery group file

• Create a new recovery folder in the same directory level as cobo-mpc-recovery-tool, and paste the TSS recovery group files under the recovery folder

├── cobo-mpc-recovery-tool
└── recovery
    ├── recovery-secrets-<nodeID1>-<time1>
    └── recovery-secrets-<nodeID2>-<time2>

• Execute the verify command

./cobo-mpc-recovery-tool verify \
    --recovery-group-files recovery/recovery-secrets-<nodeID1>-<time1>,recovery/recovery-secrets-<nodeID2>-<time2> \
    --group-id <groupID>

• (Optional) Locate the address.csv file after manually exporting the address information from Cobo Custody Web. Please paste address.csv under the recovery folder

├── cobo-mpc-recovery-tool
└── recovery
    ├── address.csv
    ├── recovery-secrets-<nodeID1>-<time1>
    └── recovery-secrets-<nodeID2>-<time2>

• Execute the recovery command

Adding flag --csv-file recovery/address.csv or --paths are optional and alternative to recovery command

./cobo-mpc-recovery-tool \
    --recovery-group-files recovery/recovery-secrets-<nodeID1>-<time1>,recovery/recovery-secrets-<nodeID2>-<time2> \
    --group-id <groupID> \
    --show-root-private-key

The MPC root private key and the MPC root extended public key will be reconstructed and shown in logs.

• Once the execution completed, if flag --csv-file recovery/address.csv added, all child private keys will be saved under the recovery/address-recovery-<time>.csv file in plain text. Please make sure that all data stored securely.