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# The Ethereum Sharding Meeting #2 - Berlin ![](https://notes.ethereum.org/uploads/upload_1d68e64bb42dad6987b41fb609ba5436.JPG) As a parasitic conference of [Ethereum Client Dev Conference (ECDC) 2018](https://hackmd.io/s/rkHu8MjAM), Ethereum Foundation research team organized the second sharding meeting after ECDC on July 1st, 2018. We invited sharding client implementers and researchers to join the discussions of cutting-edge Ethereum layer one protocol scalability technology. Thanks to all the attendees and live streaming viewers! The videos and slides resources are summarized below. ## Videos and Slides ### ⟠ [YouTube playlist](https://www.youtube.com/playlist?list=PLaM7G4Llrb7zEHK2UzQo3kxadPyeUy2sZ&spfreload=5) ### ⟠ 1. Sharding client implementation updates * [Trinity](https://github.com/ethereum/py-evm) (Ethereum Foundation): [Slides](https://docs.google.com/presentation/d/1bTcPN_WhjgQ4g8zDlR89bxxwKXHCIFMmWclqctToOO0/edit?usp=sharing), [beacon_chain](https://github.com/ethereum/beacon_chain) * [Diamond Drops](https://github.com/Drops-of-Diamond/diamond_drops) (Drops of Diamond) * [EthereumJ/Harmony](https://github.com/ethereum/ethereumj) (Ethereum Foundation) [Slides](https://docs.google.com/presentation/d/1p_weMS0_urlqczimkVrHpokUOaZ1QBAeqLPz3Cmg35I/edit#slide=id.g3d338c6014_0_727) * [Nimbus](https://github.com/status-im/nimbus) (Status.im) * [geth-sharding](https://github.com/prysmaticlabs/geth-sharding) (Prysmatic Labs) * [Parity](https://github.com/paritytech/parity) (ParityTech) * [PegaSys](https://pegasys.tech/) (ConsenSys) {%youtube p2nPOY4MLUM %} ### ⟠ 2. Spokes & Sharding by Nicolas Liochon (ConsenSys) * [Slides](https://docs.google.com/presentation/d/1m9rL_J_pZn9l7mCtaWDN7dHOpMo3z8H1zzG3z9Ex52g/edit?usp=sharing) {%youtube t3v0hRSKzXA %} ### ⟠ 3. Sharding Simulation by Leonardo A. BAUTISTA GOMEZ (Barcelona Supercomputing Center) * [Slides](https://www.dropbox.com/s/3xzcggw5iujjsk5/Leo-EthShard.pdf?dl=0) * Reading material: * [vbuterin and leobago: sharding fork choice rule PoC](https://github.com/leobago/research/tree/master/sharding_fork_choice_poc) {%youtube EqQigUgAEUQ %} ### ⟠ 4. Beacon Casper chain by Vitalik Buterin and Justin Drake (Ethereum Foundation) * Reading material: * [Full Casper chain v2 draft](https://notes.ethereum.org/s/Syj3QZSxm) {%youtube GAywmwGToUI %} ### ⟠ 5. BLS aggregation by Vitalik Buterin and Justin Drake (Ethereum Foundation) * [Slides](https://docs.google.com/presentation/d/1OGNauhidq60lSqq9APfKp0nfAXnZu0gszW7FNllaetQ/edit) * Reading material: * [Pragmatic signature aggregation with BLS](https://ethresear.ch/t/pragmatic-signature-aggregation-with-bls/2105) {%youtube DpV0Hh9YajU %} ### ⟠ 6. Discussion: STARKs in sharding with Eli Ben Sasson, Uri Kolodny, Avihu Levy (StarkWare), and Justin Drake (Ethereum Foundation) * Reading material: * [Vitalik Buterin - STARKs, Part I: Proofs with Polynomials](https://vitalik.ca/general/2017/11/09/starks_part_1.html) * [Vitalik Buterin - STARKs, Part II: Thank Goodness It's FRI-day ](https://vitalik.ca/general/2017/11/22/starks_part_2.html) * [Hash-based VDFs, MIMC and STARKs](https://ethresear.ch/t/hash-based-vdfs-mimc-and-starks/2337) {%youtube OD9zeWh4upw %} ### ⟠ 7. Proofs-of-Custody by Vitalik Buterin and Justin Drake (Ethereum Foundation) * Reading material: * [Cryptographic proof of custody for incentivized file-sharing](https://distributedlab.com/whitepaper/ProofOfcustody.pdf) and [An efficient concise scheme for proof-of-custody ](https://docs.google.com/document/d/10A-eDCozwd8um2R7ojOMFjRjitiGx81YCOYu4rbfewI/edit#heading=h.gn15qq27fdzu) by Pavel Kravchenko and Vlad Zamfir * [Enforcing windback (validity and availability), and a proof of custody](https://ethresear.ch/t/enforcing-windback-validity-and-availability-and-a-proof-of-custody/949) * [Extending skin-in-the-game of notarization with proofs of custody](https://ethresear.ch/t/extending-skin-in-the-game-of-notarization-with-proofs-of-custody/1639) * [1-bit aggregation-friendly custody bonds](https://ethresear.ch/t/1-bit-aggregation-friendly-custody-bonds/2236) {%youtube jRcS9D_gw_o %} ### ⟠ 8. Discussion: Sharding P2P networking roundtable with Mai-Hsuan (Kevin) Chia, Felix Lange, Guillaume Ballet (Ethereum Foundation), and Lars Gierth (Protocol Labs) * [Slides - P2P roundtable by Mai-Hsuan (Kevin) Chia](https://docs.google.com/presentation/d/11a0jibNz0fyUnsWt9fa2MmghHANdHAAABa0TV7EieHs/edit?usp=drivesdk%0A) * [Slides - libp2p in a nutshell by Lars Gierth](https://ipfs.io/ipfs/QmfG4kCHatezZYsbhkisM97upxXxv3Jzt8YWD6y7B2pExh) * Reading materal: * [Ethereum Sharding P2P Requirements](https://docs.google.com/presentation/d/1qJInTUsx_dSo836lcDxq9jR7pv-QWyKYJemcYi_iQnA/edit?usp=sharing) * [Torus-shaped sharding network](https://ethresear.ch/t/torus-shaped-sharding-network/1720) * [Exploring Ethereum on libp2p](https://github.com/libp2p/libp2p/issues/33) {%youtube TLzQe59qX5E %} ### ⟠ 9. Discussion: Casper ❤️ sharding and everything with Vitalik Buterin, Justin Drake, Karl Floersch, Danny Ryan, Hsiao-Wei Wang (Ethereum Foundation), and Everyone * Reading materal: * [Committee-based sharded Casper](https://ethresear.ch/t/committee-based-sharded-casper/2197/) * [Full Casper chain v2 draft](https://notes.ethereum.org/s/Syj3QZSxm) {%youtube JDR9NollfmY %} ## Acknowledgments Thank you to [Livepeer](https://livepeer.org/) for providing live streaming and filming. * Video: Anton Tal [@antontal](https://twitter.com/antontal) * Audio: Matteo Tambussi [@matlemad](https://twitter.com/matlemad) * Producer: Chris Hobcroft [@chrishobcroft](https://twitter.com/chrishobcroft) * Executive Producer: Doug Petkanics [@petkanics](https://twitter.com/petkanics) * For [@livepeertv](https://twitter.com/livepeertv) on behalf of [@LivepeerOrg](https://twitter.com/LivepeerOrg) Thank you to [Status.im](https://status.im/) for coordinating the event planning with us, especially [Jacek Sieka](https://twitter.com/jcksie). Thank you to Ethereum Foundation, especially [Aya Miyaguchi](https://twitter.com/mi_ayako), [Maurice von Glasenapp](https://twitter.com/mvglasenapp), and [Toya Budunggud](https://twitter.com/toya77196996) for helping us organize the event. Thank you to all the attendees and community supports - thank you for spending your valuable time, participating and engaging sharding R&D! :::info For further and deeper discussion, please visit https://ethresear.ch/ forum. :::