29회 이더리움 밋업 - Ethereum 2.0 and Deposit Contract

1. SCVSoft : Benajmin Hyokeun Oh 주식회사 에스씨브이소프트 Ethereum 2.0 And Deposit Contract

2. Whoami Benjamin Hyokeun Oh (오효근) CEO of SCVSoft • Hanyang Univ. majoring CSE • Best of the Best 4th, Vulnerability Research Track • CodeEngn Conference 12 (2015) • Inc0gnito 2015/2016 Speaker • (주)Doobit ex-CDO For more info : www.benjioh5.com 1/50

3. - NOT the Space Contruct Vehicle! - Security & Cryptocurrency Venture - B2B w/ R&D, auditing, consulting based company - ﬁrst B2C product (ACHER) will be lauching at 2019 Q4 or 2020 Q1 For more info : www.scvsoft.net 2/50 SCVSoft

4. - No one in Korea talks about deposit phase's importance (Really?) - There are lots of description about FFG, CBC, Chasper, and Beacon Chain.  BUT there are few article on deposit contract. - Want to say there are extensible way to ERC-20 deposit/withdrawal activity. - ACHER -our ﬁrst B2C project- has deposit/withdrawal action on smart contract by Call and DelegateCall. I can be adopted every another new contract! Why I choose deposit contract? 3/50

5. - Ethereum 2.0 has 3 Phases for PoW to fully PoS support (or more phases?) - Each phase, Beacon Chain and shards get more feature of ETH 1.0 Chain. - Then Why PoS is needed for Ethereum 2.0? - More fast and decentralized chain will be made - More power eﬃcient to make system working than PoW Eth2.0 & Pos & Deposit &… 4/50

6. - Then, What is Proof of Staking? - Kind of betting or deposit for making new block. - Who use PoS? - QTUM, EOS, and so on... - Any diﬀerence btw ordinary PoS? - FFG is totally diﬀerent from other PoS Algorithm. Eth2.0 & Pos & Deposit &… 5/50

7. - Then how to stake Ethereum in Eth1.0 Chain? - Using deposit contract. Send adjust amount Ethereum to deposit contract. - How to withdraw it? - There are no way until Phase 2. Sending Ethereum to deposit contract is one way trip. - All Ethereum send to deposit contract is only usable on Beacon chain. There is no turning back. - Q : Is it a risk factor? A : Maybe Eth2.0 & Pos & Deposit &… 6/50

8. - Then how to stake Ethereum in Eth1.0 Chain? - Using deposit contract. Send adjust amount Ethereum to deposit contract. - How to withdraw it? - There are no way until Phase 2. Sending Ethereum to deposit contract is one way trip. - All Ethereum send to deposit contract is only usable on Beacon chain. There is no turning back. - Q : Is it a risk factor? A : Maybe Eth2.0 & Pos & Deposit &… 7/50

9. - Made by Vyper - Using @Payable decorator to deposit Ethereum - Using Merkle Tree to store data ( > 4.2 Billion deposit data) - About 110 line of vyper code makes fully deposit contract for the beacon chain Deposit contract 8/50

14. - It takes too long time to describe it. I'll say very little of it. - It's data structure which can extend data with very low cost and lower time. - Lots of bit operations and hashing is main thing of merkle tree. - 32 depth == 2^32 depositable address == 4,294,967,295 Address! - 2^(32-1) == 2,147,483,648 Address! - Then 2^32 * 192 Byte == 824,633,720,832 Byte??? - > 824GB ?? Merkle tree in deposit contract 13/50

15. - No! - (2^32 + 2^31 + 2^30 + ... + 2^1 + 2^0) * 32 Byte (SHA256) == 274,877,906,912 Byte - < 275 GB (...?) for 4,294,967,295 Address! - Well.... It's eﬃcient than old one.... Hmm... - Merkle Tree grows when new data is added. So, must has lesser size than 275GB - (2^([log_2(n)]+1) - 1) * 32 Byte < 32 * n Byte will be size of merkle tree. Merkle tree in deposit contract 14/50

16. - There are more eﬃcient way to do it. isn't it? - Yes. Let's see the code. Merkle tree in deposit contract 15/50

17. - There are more eﬃcient way to do it. isn't it? - Yes. Let's see the code. Merkle tree in deposit contract 16/50

18. Only the Ethereum is depositable?

19. No!

20. Sample Solidity 19/50

25. Done?

26. No!

27. Sample Solidity w/ SCVToken 26/50

31. Token can be send to the smartcontract  (actually ERC20 smart contract's data is updated, and doesn't care about address type) Sample Solidity w/ SCVToken 30/50

33. Let's Init SCVToken addr Sample Solidity w/ SCVToken 32/50

35. Initialized! Sample Solidity w/ SCVToken 34/50

36. Now using Smartcontract's call (or delegatecall) send some ERC20 Token Sample Solidity w/ SCVToken 35/50

37. Now using Smartcontract's call (or delegatecall) send some ERC20 Token Sample Solidity w/ SCVToken 36/50

38. <- Don't forget * 10^18 (decimal) call! I forgot about that :( <- Target Addr Sample Solidity w/ SCVToken 37/50

40. calls smartcontract Sample Solidity w/ SCVToken 39/50

41. - ㅊㅊㅊㅊㅊ차ㅗㅕ추ㅗㅕㅜㅠㅆㄹㅅ총여ㅜㅜㅎ퍄차아ㅣㄱ도셔ㅣㅕ핓 - It works! Smart contract send token to another address! Sample Solidity w/ SCVToken 40/50

42. - Using call and delegatecall, there are way to DEPOSIT & WITHDRAW ERC20 Tokens. - Actually, ERC721, ERC1155 would works too. - So, We can construct one way trip to another chain or smart contract based asset management! - But If ERC20 Contract has function which force A to B transfer by admin, there are some problem on deposit or staking. :( - Actually, Ethereum transfer and ERC20 transfer can be never same thing. - But there are way to mock staking and desposit system. Sample Solidity w/ SCVToken 41/50

43. - No one in Korea talks about deposit phase's importance (Really?) - There are lots of description about FFG, CBC, Chasper, and Beacon Chain.  BUT there are few article on deposit contract. - Want to say there are extensible way to ERC-20 deposit/withdrawal activity. - ACHER -our ﬁrst B2C project- has deposit/withdrawal action on smart contract by Call and DelegateCall. I can be adopted every another new contract! Sample Solidity w/ SCVToken 42/50

44. - No one in Korea talks about deposit phase's importance (Really?) - There are lots of description about FFG, CBC, Chasper, and Beacon Chain  BUT there are few article on deposit contract. - Want to say there are extensible way to ERC-20 deposit/withdrawal activity. - ACHER -our ﬁrst B2C project- has deposit/withdrawal action on smart contract by Call and DelegateCall. It can be adopted every another new contract! Sample Solidity w/ SCVToken 43/50

45. Identification on Blockchain

46. - ACHER -our ﬁrst B2C project- has deposit/withdrawal action on smart contract by Call and DelegateCall. It can be adopted every another new contract! - Identiﬁcation through smart contract which is called ERC-725 is used for DID and multi support of EOA. - Present day, Our Goal is using smart contract for Deposit and Withdrawal of any type of asset in Blockchain. - Using Depositable smart contract, BLOCKCHAIN WOULD BE MORE EASIER ACHER 45/50

47. ACHER : Identification on blockchain User Signature Checking & Authorization Get Authority Info Private Key KYC Digital Signature Identification Crypto Wallet OAuth2 FIDO2 END Service ERC-725 ERC-1484 Smart Contract Service Blockchain Stack 46/50

48. KYC Digital Signature Identification Crypto Wallet OAuth2 FIDO2 END Service Browser Extension  (e.g. Metamask) iOS Android App Dapp (Centralized) Auth Server IPFS/ Swarm decentralize SDK (js/python) Service Blockchain Stack ERC-725 ERC-1484 Smart Contract ACHER : Identification on blockchain 47/50

49. KYC Digital Signature Identification Crypto Wallet OAuth2 FIDO2 END Service Browser Extension  (e.g. Metamask) iOS Android App Dapp (Centralized) Auth Server IPFS/ Swarm Service Blockchain Stack ERC-725 ERC-1484 Smart Contract B2B Part ACHER : Identification on blockchain decentralize SDK (js/python) 48/50

50. KYC Digital Signature Identification Crypto Wallet OAuth2 FIDO2 END Service Browser Extension  (e.g. Metamask) iOS Android App Dapp IPFS/ Swarm Service Blockchain Stack ERC-725 ERC-1484 Smart Contract B2C Part ACHER : Identification on blockchain decentralize SDK (js/python) (Centralized) Auth Server 49/50

51. FIN

29회 이더리움 밋업 - Ethereum 2.0 and Deposit Contract

You are reading a preview.

Check these out next

29회 이더리움 밋업 - Ethereum 2.0 and Deposit Contract

More Related Content

Similar to 29회 이더리움 밋업 - Ethereum 2.0 and Deposit Contract (20)

Recently uploaded (20)

29회 이더리움 밋업 - Ethereum 2.0 and Deposit Contract