Zcoin Development Update 31 March 2019

Muggles · April 1, 2019, 3:05am

Sigma

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Private testnet launch was successful
Sigma spend with remint was completed
RPC for spending old Zerocoin mints en-masse for preparation of movement to Sigma coded.
Working on transition code still for hard fork.
Accumulator size per denomination set at 16,000
Transaction balance checks being worked on
Basic QT GUI coding in progress
Because of MTP hard fork ntime (wasn’t based on height) and block time set to 5 minutes, halving is slightly inaccurate, to adjust during Sigma hard fork.
Discussion on using alternative denominations based on this paper.
Public testnet hopefully in another 2 weeks.

Code revised to take into account Aram’s change in paper
Benchmark multi exponentiation improvements over paper
- Test implementation of Pippenger’s algorithm yielded worse results than earlier implementation so need to relook into it
- Still about 20% slower compared to Andrew Poelstra’s implementation but aim to beat it
Received feedback from Dr Sarang Noether from Monero Research Labs who wanted clarification on the implementation of Fiat-Shamir transform security properties. Jens Groth didn’t express any alarms on this but to look into whether we can have more rigorous security analysis.
Aram cleaning up paper to prepare for publication on eprint.

All issues ported from old repo to new repo and run through with Reuben
Agreed on 0.1 milestone release targets
Mostly minor issues but some bugs in relation to calculating balances may take a little longer
Some design elements are less than ideal and don’t reflect real world behavior. Agreed on way to modify.
Italian translation done (please get in touch if you want to volunteer some time to add other translations!)

Privatesend removed and InstantSend being ported
Estimated 2-3 weeks able to roll out and complete migration of Dash code for using deterministic masternodes