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スマートコントラクト / Smart Contracts

スマートコントラクト / Smart Contracts

2018年4月25日(水)、ブロックチェーンハブ主催で開催されたブロックチェーンアカデミー「スマートコントラクト」(ブロックチェーン基盤技術【トークンの設計からシェアリングエコノミーまで】) にて使用したスライドです。

Kenji Saito
PRO

April 25, 2018
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  1. CSO / SFC [email protected] — — 2018-04-25 – p.1/41

  2. ( ) SFC ( ) CSO (Chief Science Officer) 1993

    ( ) 2006 ( ) SFC 17 P2P (Peer-to-Peer) 2011 → ( ) — — 2018-04-25 – p.2/41
  3. — — 2018-04-25 – p.3/41

  4. — — 2018-04-25 – p.4/41

  5. — — 2018-04-25 – p.5/41

  6. ↑ . . . — — 2018-04-25 – p.6/41

  7. vs. — — 2018-04-25 – p.7/41

  8. 1. ⇒ ( ) ⇒ 2. ⇒ ⇒ 3. ⇒

    — — 2018-04-25 – p.8/41
  9. (by ) 1. 2. ( ) ( ) . .

    . cf. by McLuhan cf. by McLuhan — — 2018-04-25 – p.9/41
  10. ⇒ : ⇒ — — 2018-04-25 – p.10/41

  11. ⇒ : ⇒ — — 2018-04-25 – p.11/41

  12. (Ethereum) ( ) EVM (Ethereum Virtual Machine) — — 2018-04-25

    – p.12/41
  13. Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT

    & DECENTRALIZED APPLICATION PLATFORM” 15 — — 2018-04-25 – p.13/41
  14. = run — — 2018-04-25 – p.14/41

  15. Ether Ethereum EOA : Externally-Owned Account Ether EVM EVM —

    — 2018-04-25 – p.15/41
  16. EVM : Ethereum Virtual Machine Gas — — 2018-04-25 –

    p.16/41
  17. — — 2018-04-25 – p.17/41

  18. EVM : . . . : Solidity — JavaScript LLL

    — Lisp — — 2018-04-25 – p.18/41
  19. Solidity ( ) pragma solidity ˆ0.4.8; contract IndivisibleAsset { /*

    */ string public _name; string public _symbol; uint256 public _quantity; address public _owner; function IndivisibleAsset(string name, string symbol, uint256 quantity) { _name = name; _symbol = symbol; _quantity = quantity; _owner = msg.sender; } function transfer(address to) { if (_owner != msg.sender) { throw; } _owner = to; } } — — 2018-04-25 – p.19/41
  20. Solidity JavaScript ( , ) (constructor) ( ) ( )

    Ether — — 2018-04-25 – p.20/41
  21. · ex. · ex. — — 2018-04-25 – p.21/41

  22. ADEPT — — 2018-04-25 – p.22/41

  23. ADEPT ADEPT : IBM IoT → ⇒ — — 2018-04-25

    – p.23/41
  24. — — 2018-04-25 – p.24/41

  25. ⇒ — — 2018-04-25 – p.25/41

  26. The DAO ( ) The DAO Split ( ) 360

    ETH (50∼60 ) (2016/6/17) ( ) ( ; ) (2016/7/20 ) — — 2018-04-25 – p.26/41
  27. — — 2018-04-25 – p.27/41

  28. ERC20 ERC (Ethereum Request for Comment) 20 https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md contract ERC20

    { function totalSupply() constant returns (uint totalSupply); function balanceOf(address _owner) constant returns (uint balance); function transfer(address _to, uint _value) returns (bool success); function transferFrom(address _from, address _to, uint _value) returns (bool success); function approve(address _spender, uint _value) returns (bool success); function allowance(address _owner, address _spender) constant returns (uint remaining); event Transfer(address indexed _from, address indexed _to, uint _value); event Approval(address indexed _owner, address indexed _spender, uint _value); } name/ , symbol/ , decimals/ approve allowance ERC223 ( ), ERC721 (Non-Fungible) — — 2018-04-25 – p.28/41
  29. OS — — 2018-04-25 – p.29/41

  30. OS (2007) — — 2018-04-25 – p.30/41

  31. OS ↑ cf. NPO/NGO — — 2018-04-25 – p.31/41

  32. OS — — 2018-04-25 – p.32/41

  33. Uber — — 2018-04-25 – p.33/41

  34. Uber Uber P2P + Uber — — 2018-04-25 – p.34/41

  35. / . . . — — 2018-04-25 – p.35/41

  36. ( ) / / — — 2018-04-25 – p.36/41

  37. — 1. ( ) 2. ( ) 3. ( )

    — — 2018-04-25 – p.37/41
  38. Communicating Promises in the Air CPA : Communicating Promises in

    the Air etc. → — — 2018-04-25 – p.38/41
  39. 10 12 → 120 120 12 12 120 — —

    2018-04-25 – p.39/41
  40. — — 2018-04-25 – p.40/41

  41. — — 2018-04-25 – p.41/41