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ブロックチェーン概論とインストール大会 / Overview of Blockchain and Installation

ブロックチェーン概論とインストール大会 / Overview of Blockchain and Installation

2021年10月18日(月)、慶應義塾大学大学院メディアデザイン研究科「サービスデザインプロジェクト B」2021秋 第2回で使用されたスライドです。

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Kenji Saito
PRO

October 18, 2021
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  1. B 2021 2 ( ) B 2021 — 2 —

    2021-10-18 – p.1/58
  2. https://speakerdeck.com/ks91 ( ) Discord Discord ( / / ) Zoom

    URL ( ) B 2021 — 2 — 2021-10-18 – p.2/58
  3. ( ) 1 10 11 • 2 10 18 •

    3 10 25 4 11 1 5 11 8 1 6 11 15 2 7 11 22 8 11 29 Discord B 2021 — 2 — 2021-10-18 – p.3/58
  4. – : : Ethereum ( ) ( ) Ethereum B

    2021 — 2 — 2021-10-18 – p.4/58
  5. – B 2021 — 2 — 2021-10-18 – p.5/58

  6. ( ) ( ) ( ) ↓ ( ( ))

    (BP : Blockchain Property ) BP-1 : ( ) BP-2 : ( ( ) ) BP-3 : ( ) ( ) ( ) B 2021 — 2 — 2021-10-18 – p.6/58
  7. ( ) (LIFO : Last In, First Out) ( )

    B 2021 — 2 — 2021-10-18 – p.7/58
  8. ( ) ( ) ( ) ( ) ( 16

    ) SHA (Secure Hash Algorithm) ( ) 1bit B 2021 — 2 — 2021-10-18 – p.8/58
  9. ( ) ( ) < , > ( ) ←

    : < , > : : < , , > : OK ( 1 ) NG ( ) B 2021 — 2 — 2021-10-18 – p.9/58
  10. BP-1 ( ), BP-2 ( ) BBc-1 f : →

    BP-3 ( ) ( ) ( ) ← BP-2 ← BP-3 ( ) (BP-2 ) ( ) ← BP-3 (?) + ← BP-{1,2} B 2021 — 2 — 2021-10-18 – p.10/58
  11. [Lamport 1984][Schneider 1990] (1) (2) (3) (4) ( ) ←

    ↑ B 2021 — 2 — 2021-10-18 – p.11/58
  12. TX : transaction ( 4 TX ) SMRP (State Machine

    Replication Problem) SMRP-1 ( ) SMRP-2 : B 2021 — 2 — 2021-10-18 – p.12/58
  13. ( ) ( ) ϒϩοΫ൪߸O ϒϩοΫ൪߸O  ϒϩοΫ൪߸O  ϒϩοΫ൪߸O

     ϒϩοΫ൪߸O  ϒϩοΫ൪߸O  ϒϩοΫ൪߸O  ϒϩοΫ൪߸O  ͍ͪ͹Μه࿥ɾॻ͖׵͑ͷίετ͕ߴ͍ྺ࢙ ࠷΋վ͟Μ͠ʹ͍͘ྺ࢙ ͕༗ޮ ͻͱͭखલͷϒϩοΫͷ ʮμΠδΣετʯ σδλϧॺ໊͞Εͨ ʮτϥϯβΫγϣϯ औҾ ʯ ϒϩοΫΛ࡞ΔͨΊʹ͸ɺͦͷʮμΠδΣετʯ͕͋Δ਺ҎԼͱ͍͏৚݅Λຬͨͨ͠Γ 1SPPGPG8PSL Ծ૝௨՟ͷ࣋ͪ෼ʹԠͨ͡ݖརΛ࢖ͬͨ౤ථͰউͬͨΓ 1SPPGPG4UBLF ͢Δඞཁ͕͋Δ ίετ͕͔͔Δ ϒϩοΫΛ࡞Δਓ͸ͦͷதʹࣗ෼ʹѼͯͨ Ծ૝௨՟ͰͷใुΛॻ͖ࠐΉ͜ͱ͕Ͱ͖ɺ ͦͷϒϩοΫ͕༗ޮͳྺ࢙ͷதʹ͋Δ৔߹ʹ ݶΓใु΋༗ޮͱͳΔ τϥϯβΫγϣϯͷଘࡏΛ֬ೝ͢Δ ͨΊͷޮ཰తͳํ๏͕ఏڙ͞ΕΔ ਖ਼౰ੑ ଘࡏੑ །Ұੑ Proof of Work ( ) ( ) . . . → B 2021 — 2 — 2021-10-18 – p.13/58
  14. (BP-3 ) ( : ) (BP-3 ) ( : )

    ← NFT BP-{1,2,3} BP-{1, 2} ⇒ B 2021 — 2 — 2021-10-18 – p.14/58
  15. (Confidentiality) BP-{1,2,3} ↑ ( = ) (Integrity) BP-3 (Availability) BP-2

    B 2021 — 2 — 2021-10-18 – p.15/58
  16. 2009 ↑ 12 ( 5 ) B 2021 — 2

    — 2021-10-18 – p.16/58
  17. ( ) ADR (Active (space) Debris Removal) : https://doi.org/10.1109/TCSS.2018.2890655 (1930

    ) ( ) B 2021 — 2 — 2021-10-18 – p.17/58
  18. ( ) ( ) ( ) B 2021 — 2

    — 2021-10-18 – p.18/58
  19. ( ) ( - ) : https://doi.org/10.1016/j.future.2019.05.019 B 2021 —

    2 — 2021-10-18 – p.19/58
  20. ( ) ( ) ( ) B 2021 — 2

    — 2021-10-18 – p.20/58
  21. ( ) B 2021 — 2 — 2021-10-18 – p.21/58

  22. / ( ) ( ) ( ) ( ) B

    2021 — 2 — 2021-10-18 – p.22/58
  23. ( ) ( ) ( ) B 2021 — 2

    — 2021-10-18 – p.23/58
  24. ( ) : https://www.lij.jp/html/jli/jli_2017/ 2017summer_p018.pdf B 2021 — 2 —

    2021-10-18 – p.24/58
  25. ( ) ( ) B 2021 — 2 — 2021-10-18

    – p.25/58
  26. B 2021 — 2 — 2021-10-18 – p.26/58

  27. with ( ) ( ) : https://doi.org/10.1016/j.icte.2021.08.012 ( ) B

    2021 — 2 — 2021-10-18 – p.27/58
  28. DNS : https://arxiv.org/abs/2011.05442 ( ) IP AS B 2021 —

    2 — 2021-10-18 – p.28/58
  29. ( ) ( ) : https://arxiv.org/abs/2011.05442 ( ) : https://doi.org/10.1016/j.icte.2021.08.012

    (web ) B 2021 — 2 — 2021-10-18 – p.29/58
  30. ( ) ( ) ( ) : https://doi.org/10.1016/j.icte.2021.08.012 ( )

    ( ) ( ) : https://arxiv.org/abs/2011.05442 B 2021 — 2 — 2021-10-18 – p.30/58
  31. ( ) ( ) : https://arxiv.org/abs/2011.05442 3D HACCP ( )

    B 2021 — 2 — 2021-10-18 – p.31/58
  32. 2. Ethereum macOS (Big Sur 11.6) + Homebrew Linux (Ubuntu

    20.04.3) (x86/AMD64 and ARM) Windows 10 + Windows Subsystem for Linux (Ubuntu ) Ethereum solidity brownie B 2021 — 2 — 2021-10-18 – p.32/58
  33. Solidity Ethereum ( ) http://solidity.readthedocs.io/en/latest/installing-solidity.html Linux (on Windows) “sudo apt”,

    macOS “brew” Linux ARM git clone dependencies solc 0.8.9 (10/6 ) $ solc --version brownie py-solc-x solc (dependencies) ( solc py-solc-x ) B 2021 — 2 — 2021-10-18 – p.33/58
  34. Ganache CLI Ethereum RPC npm ( ) macOS https://qiita.com/kyosuke5_20/items/c5f68fc9d89b84c0df09 Linux

    https://qiita.com/seibe/items/36cef7df85fe2cefa3ea npm Ganache CLI $ sudo npm install -g ganache-cli B 2021 — 2 — 2021-10-18 – p.34/58
  35. Python3 macOS $ brew install python@3.8 python3 python 3.9 (12/2

    ) 3.9 3.8 3.9 $ brew uninstall --ignore-dependencies python@3.9 $ brew install python@3.8 /usr/local/opt/python@3.8/bin/python3 Linux $ sudo apt update $ sudo apt install python3.8 python3.8-dev python3.8-venv python3.8-tk 16.10 python3(.8) apt (PPA ) python3 python3-dev python3-venv python3-tk B 2021 — 2 — 2021-10-18 – p.35/58
  36. macOS : . . . macOS wget brew dyld: Library

    not loaded: /usr/local/opt/gettext/lib/libintl.8.dylib $ brew uninstall --force gettext $ brew install gettext B 2021 — 2 — 2021-10-18 – p.36/58
  37. Python (venv) macOS (Linux python3 ) ‘python3.8’ ‘python3’ $ python3.8

    -m venv bbc1env $ source bbc1env/bin/activate (bbc1env) $ pip install -U pip (bbc1env) $ pip install wheel bbc1env ( BBc-1 ) ( ) (bbc1env) $ deactivate B 2021 — 2 — 2021-10-18 – p.37/58
  38. Brownie Python Ethereum https://eth-brownie.readthedocs.io Brownie $ pip install eth-brownie version

    1.16.4 (10/6 ) B 2021 — 2 — 2021-10-18 – p.38/58
  39. $ brownie init ( ERC-20 ) $ brownie bake token

    $ cd token B 2021 — 2 — 2021-10-18 – p.39/58
  40. contracts (macOS Linux (x86/AMD64) ) $ brownie compile Linux (ARM)

    (AMD64 ) $ python # >>> import solcx >>> solcx.compile_solc(’0.6.12’) # >>> quit() /tmp ~/.solcx/solc-v0.6.12 ( ) $ pytest tests B 2021 — 2 — 2021-10-18 – p.40/58
  41. Brownie $ brownie console Python >>> len(accounts) 10 >>> accounts[0].balance()

    100000000000000000000 >>> quit() B 2021 — 2 — 2021-10-18 – p.41/58
  42. 3. Ethereum ropsten B 2021 — 2 — 2021-10-18 –

    p.42/58
  43. infura.io Brownie https://infura.io SIGN UP PROJECT ID infura Ethereum API

    infura . . . infura.io PROJECT ID WEB3_INFURA_PROJECT_ID PROJECT ID (~/.bash_profile ) $ export WEB3_INFURA_PROJECT_ID= PROJECT ID B 2021 — 2 — 2021-10-18 – p.43/58
  44. ropsten ETH brownie console ropsten >>> network.disconnect() >>> network.connect(’ropsten’) >>>

    len(accounts) 0 >>> accounts.add() <LocalAccount object ’ 16 ’> >>> accounts[0].private_key 16 >>> quit() Ropsten Testnet ETH Faucet 5.0ETH https://faucet.dimensions.network/ ( ) https://metamask.io/ B 2021 — 2 — 2021-10-18 – p.44/58
  45. ropsten ETH brownie console ropsten ETH >>> network.disconnect() >>> network.connect(’ropsten’)

    >>> len(accounts) 0 >>> accounts.add( 16 ) <LocalAccount object ’ 16 ’> >>> accounts[0].balace() ETH >>> quit() ETH >>> accounts[0].transfer(accounts[1], "1 ether") B 2021 — 2 — 2021-10-18 – p.45/58
  46. Ethereum B 2021 — 2 — 2021-10-18 – p.46/58

  47. Ethereum Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART

    CONTRACT & DECENTRALIZED APPLICATION PLATFORM” 15 (= ) = ⇒ → Dapps ( / / ) B 2021 — 2 — 2021-10-18 – p.47/58
  48. ( ) B 2021 — 2 — 2021-10-18 – p.48/58

  49. . . . B 2021 — 2 — 2021-10-18 –

    p.49/58
  50. vs. B 2021 — 2 — 2021-10-18 – p.50/58

  51. = run B 2021 — 2 — 2021-10-18 – p.51/58

  52. Ether Ethereum EOA : Externally-Owned Account ( ) Ether EVM

    EVM B 2021 — 2 — 2021-10-18 – p.52/58
  53. EVM : Ethereum Virtual Machine Gas ( EVM = (

    burn)) . . . B 2021 — 2 — 2021-10-18 – p.53/58
  54. EVM : : ← : Solidity — JavaScript LLL —

    Lisp Vyper — Python Fe — Vyper Rust ← NEW! Solidity Vyper Python B 2021 — 2 — 2021-10-18 – p.54/58
  55. Solidity ( ) pragma solidityˆ0.7.0; contract IndivisibleAsset { /* */

    string public _name; string public _symbol; uint256 public _quantity; address public _owner; constructor(string memory name, string memory symbol, uint256 quantity) public { _name = name; _symbol = symbol; _quantity = quantity; _owner = msg.sender; } function transfer(address to) public returns (bool) { require (_owner == msg.sender); _owner = to; return true; } } B 2021 — 2 — 2021-10-18 – p.55/58
  56. ( , ) (constructor) (deploy) = ( ) ( )

    ETH Trusted Actor Model B 2021 — 2 — 2021-10-18 – p.56/58
  57. Ethereum B 2021 — 2 — 2021-10-18 – p.57/58

  58. B 2021 — 2 — 2021-10-18 – p.58/58