Epic: Demo for Trusted Dealer key share generation

[mpguerra]

Motivation

We want to simulate a simple execution of FROST to show potential FROST implementers how to use the FROST library.

Scope

Build a simple CLI that runs trusted dealer key generation and writes out the necessary data to the terminal. Demo can take in a number of participants and will generate a number of unique identifiers for the number of participants, it will then generate all of the various data required in each round

• Generate trusted dealer keygen output in CLI demo #283
• Return VerifiableSecretSharingCommitment in frost-zcash-demo #324
• Update frost package to v0.2.0 #325
• Handle errors in frost-zcash-demo #326
• Build README #339
• Implement split() in demo so a trusted dealer can accept a secret #362

Specification

On startup, the Trusted Dealer demo will prompt for:

• A group secret to be split into shares (s)
• The number of shares to generate (MAX_PARTICIPANTS)
• The threshold number of participants for the secret sharing scheme (MIN_PARTICIPANTS)

The dealer CLI will then use that data to generate:

• Each participant’s secret share: s_1 - s_MAX_PARTICIPANTS - by running trusted_dealer_keygen
• The group public key: PK (which is the same as vss_commitment[0]) - by running trusted_dealer_keygen
• A commitment to the secret: vss_commitment - by running trusted_dealer_keygen
• Each participant’s public key: PK_1 - PK_MAX_PARTICIPANTS - by running derive_group_info

This above data will be output by the Trusted Dealer demo to the terminal (or a file or wherever it makes sense) to be input into the Participant CLI (#239) during the Signature Generation demo.

[mpguerra]

Hey team! Please add your planning poker estimate with Zenhub @conradoplg @dconnolly @natalieesk

[natalieesk]

I didn't mean to close this issue. There's more to be done.

[mpguerra]

I think this is big enough for an epic by itself

[mpguerra]

All done! 🎉