Evidence-0000: Retention at/Promotion to Rank 1


Report Date	Date of submission (2024/08/28)
Submitted by	Tsvetomir Dimitrov

Member details

Matrix username: @tsvetomir:parity.io
Polkadot address: 1QhVP5qzR2LfXqP77N1JcuwHoY7NH8JVRNFm1hSooE9d4pR
Current rank: 1
Date of initial induction: 2023/10/11
Date of last report: NA
Area(s) of Expertise/Interest: Disputes, Agile Coretime

Reporting period

Start date: 2024/05/26
End date: 2024/08/28

Evidence

During the last three months I was involved with validator disabling strategy implementation and Agile Coretime testing.

For validator disabling I was responsible for implementing a generic disabling strategy interface in the staking pallet and also implementing a concrete disabling strategy used in Polkadot. PR with the changes: https://github.com/paritytech/polkadot-sdk/pull/2226. It's important to note that the disabling strategy as a whole was a team effort. I was responsible just for the runtime implementation part.

I joined late to the Agile Coretime efforts and contributed mainly with testing and bug fixes. My contributions:

Fix for multiple parachains sharing a single core. When two parachains were set to share a core they were 'skipping slots'. The issue was that not all subsystems were using the claim queue to check what's scheduled in the future. The PR is co-authored by @alindima. PR: https://github.com/paritytech/polkadot-sdk/pull/4724
Fix in the runtime migration transferring legacy parachains leases to Coretime chain. There were two issues with the runtime migration. (1) parachains without a legacy lease in the current period but with a legacy lease in the future were not trasnferred to the Coretime chain and (2) time slice calculation formula was wrong. PRs: https://github.com/paritytech/polkadot-sdk/pull/5380 and https://github.com/polkadot-fellows/runtimes/pull/426
The previous issues was discovered with a chopsticks test performing the runtime upgrade and verifying the state after the migration. The code for the test is in this repo: https://github.com/tdimitrov/polkadot-coretime-launch-test
Add Agile Coretime to Polkadot. I've picked up a draft PR by @eskimor enabling Agile Coretime on Polkadot and ported it ontop of the latest release and finished the necessary configurations. PR: https://github.com/polkadot-fellows/runtimes/pull/401

Besides code contributions I am also an active code reviewer. My reviews: https://github.com/paritytech/polkadot-sdk/pulls?q=is%3Apr+reviewed-by%3Atdimitrov+

Voting record

Provide your voting record in relation to required thresholds for your rank.

Ranks	Activity thresholds	Agreement thresholds	Member's voting activities	Comments
I	90%	N/A	I have voted on 0 out of 2 referenda in which I was eligible to vote (i.e 0 % voting activity). Out of 2 referenda in which members of higher ranks were in complete agreement, I have voted in line with the consensus 0 times (i.e 0 % voting agreement).	I missed both chances to cast my first vote and I have no excuse for this. I'll pay more attention to the referendums in the future.
II	80%	N/A
III	70%	100%
IV	60%	90%
V	50%	80%
VI	40%	70%

Misc