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Ethereum 2.0 �a.k.a. Serenity Update

Ethereum Research

​

NodeTokyo�November 19th, 2018

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英語が上手くない

日本語が下手くそ

電波系でごめんね

Hello Tokyo!

I Am Hsiao-Wei Wang

GitHub/gitter @hwwhww�Twitter @icebearhww

王筱維（おうしょうい！？）

英語が良いです

日本語が下手くそ

電波系でごめんね

こんにちは!

I Am Danny Ryan

GitHub/gitter @djrtwo�Twitter @dannyryan

ダニー ライアン

​

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We plan to upgrade...

  • From Proof-of-Work to Proof-of-Stake
  • Scaling the blockchain throughput capacity
    • Computation
    • Faster
    • Network latency
  • Extending the existing Ethereum mainnet that is still running!

​

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Serenity

Ethereum 1.0

Beacon Chain

Shard Chains

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Beacon Chain

(PoS Root Chain)

provides random numbers

Shard Chain

provides data

Shard 1024

State Execution Engine

provides state �execution result

Shard 1

PoW Main Chain

provides staking

state root

state root

state root

state root

state root

state root

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Random Number Generation

Needs randomness for selecting beacon chain & shard chains’ block proposer and attestation committee

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Random Number Generation

RANDAO scheme + �(Nice to have) Un-biasable VDF (Verifiable Delay Function) scheme

= Non-exploitable Randomness

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Proof-of-Stake

  • Casper FFG (the Friendly Finality Gadget)

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Beacon Chain

<> Shard Chain

The selected attester has to send the “attestation” to attest that:

      • some parent blocks are in the beacon chain
      • a block hash is in a shard�

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Beacon Chain

<> Shard Chain

The selected attester has to send the “attestation” to attest that:

      • some parent blocks are in the beacon chain
      • a block hash is in a shard�

Sign for the parent blocks

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Beacon Chain

<> Shard Chain

The selected attester has to send the “attestation” to attest that:

      • some parent blocks are in the beacon chain
      • a block hash is in a shard�

Crosslink: “confirm” segments of the shard chains into the beacon chain

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Only data-consensus

Block bodies are just blobs, no state root in the header

Verify the data availability

​

Shard Chain

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State Layer

​

Ethereum flavored WebAssembly (eWASM)

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Roadmap

Beacon Chain

PoS

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Roadmap

  • Shards as�data chains

Beacon Chain

PoS

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Roadmap

  • State transitions
  • Shards as�data chains

Beacon Chain

PoS

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Roadmap

  • State transitions

+

  • Shards as�data chains

Beacon Chain

PoS

Improvements

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Implementation

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To Buidlers

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Ethereum 2.0 Buidlers

GitHub: ethresearch/eth2.0-pm

gitter: ethereum/sharding

Danny Ryan

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ethresear.ch

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We are looking for ...

Blockchain Researchers

P2P Masters

Experienced Engineers

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  • Scalability
  • Usability
  • Security
  • Hackternship

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Thank you!

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Vector Icons by Matthew Skiles

Presentation template designed by Slidesmash

Photographs by unsplash.com and pexels.com

CREDITS

Special thanks to all people who made and share these awesome resources for free:

Icons made by Becris from www.flaticon.com is licensed by CC 3.0 BY

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Presentation Design

This presentation uses the following typographies and colors:

Colors used

Free Fonts used:

https://www.fontsquirrel.com/fonts/nunito

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Beacon Chain

provides random numbers

Shard Chain

provides data

Shard 100

B1

B2

B3

B4

B5

VM

provides state �execution result

Shard 1

Main Chain

provides staking

B1 �state root

B2 �state root

B3�state root

B4 �state root

B5�state root

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Beacon Chain

(PoS Root Chain)

provides random numbers

Shard Chain

provides data

Shard 1024

State Execution Engine

provides state �execution result

Shard 1

PoW Main Chain

provides staking

state root

state root

state root

state root

state root

state root