Zkool supports multisignature accounts that leverage the FROST technology.
Multisignature accounts differ from standard accounts in several ways.
Warning
I highly recommend you read this section since MultiSignature accounts may not behave as you expect.
- MultiSignature Accounts (MSig Acct) are created via a distributed Key Generation process described in the Distributed Key Generation (DKG) section.
- A MSig Acct involves a several entities/individuals who create the shared address of the account.
- During DKG, the number of signers needed for a payment is set.
- For example: a "2 out of 3" MSig Acct requires 2 participants out of the 3 account creators to sign a transaction.
- The MSig Accts do not have a known secret key[1]. They has a unified viewing key and of course an address.
- Funds sent to the MSig Acct address ends up in the account, just like for a standard account. From an external point of view, a MSig Acct is undistinguishable for a standard account[2].
- MSig Accts are Orchard. They do not have a transparent nor a sapling receiver.
- MSig Accts have diversified addresses. New addresses can be generated by any participant without coordinating with the others.
- MSig Accts do not have a seed phrase. They do not have a complete secret key. They have a share of the secret key.
- You cannot backup a MSig Acct like a regular account (since they do not have a seed phrase), but you can and should export the account.
- DKG and Signing
Important
Save your MSig Acct by exporting it, or by saving the whole database file. It has your share of the secret key.
DKG and Signing Multi Party Ceremonies
The Distributed Key Generation and the Multi Party Signing are multi step workflows that involve the transmission of secure messages between the participants.
Zkool uses the Zcash blockchain and leverages encrypted memos to send and receives the commitments, signature packages, signature shares, etc.
Funding
The communication necessitates a bit of ZEC to pay for the transaction fees.
They should be in a separate account from the MultiSig Account. This is called the funding account.
Tips
0.25 ZEC should be more than enough for ~100 multisig transactions.
If the funding account does not have enough, the DKG or SIGN will return an error. You can add more funds and resume the operation.
Sequentiality
Important
A given database can only process one DKG and one SIGN at a time. If you need to make more than one, you need to use another database file.