サービスデザインプロジェクトB 第2回「ブロックチェーン概論とインストール大会」 / Overview of Blockchain and Installation

2020年10月19日、慶應義塾大学大学院メディアデザイン研究科の「サービスデザインプロジェクトB (2020 秋)」第2回にて使用したスライドです。

Transcript

1. B 2020 2 ( ) B 2020 — 2 — 2020-10-19 – p.1/56
2. https://speakerdeck.com/ks91 Discord Discord ( / / ) Zoom URL ( ) B 2020 — 2 — 2020-10-19 – p.2/56
3. ( ) 1 10 12 • 2 10 19 • 3 10 26 4 11 2 5 11 9 1 6 11 16 2 7 11 30 8 12 7 B 2020 — 2 — 2020-10-19 – p.3/56
4. – : : Ethereum ( ) ( ) Ethereum B 2020 — 2 — 2020-10-19 – p.4/56
5. – B 2020 — 2 — 2020-10-19 – p.5/56
6. ( ) ( ) ( ) (BP : Blockchain Property ) BP-1 : BP-2 : BP-3 : ( ) ( ) B 2020 — 2 — 2020-10-19 – p.6/56
7. ( ) (LIFO : Last In, First Out) ( ) B 2020 — 2 — 2020-10-19 – p.7/56
8. ( ) ( ) ( ) ( ) ( 16 ) SHA (Secure Hash Algorithm) ( ) 1bit B 2020 — 2 — 2020-10-19 – p.8/56
9. ( ) ( ) < , > ( ) ← : < , > : : < , , > : OK ( 1 ) NG ( ) B 2020 — 2 — 2020-10-19 – p.9/56
10. BP-1 ( ), BP-2 ( ) BBc-1 f : → BP-3 ( ) ( ) ( ) ← BP-2 ← BP-3 ( ) ← BP-3 + ← BP-{1,2} B 2020 — 2 — 2020-10-19 – p.10/56
11. [Lamport 1984][Schneider 1990] (1) (2) (3) (4) ( ) ← ↑ B 2020 — 2 — 2020-10-19 – p.11/56
12. TX : transaction ( 4 TX ) SMRP (State Machine Replication Problem) SMRP-1 ( ) SMRP-2 : B 2020 — 2 — 2020-10-19 – p.12/56
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    PG
    8PSL Ծ૝௨՟ͷ࣋ͪ෼ʹԠͨ͡ݖརΛ࢖ͬͨ౤ථͰউͬͨΓ 1SPPG
    PG
    4UBLF ͢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 2020 — 2 — 2020-10-19 – p.13/56
14. (BP-3 ) ( : ) (BP-3 ) ( : ) BP-{1,2,3} BP-{1, 2} ⇒ B 2020 — 2 — 2020-10-19 – p.14/56
15. (Confidentiality) BP-{1,2,3} ↑ ( = ) (Integrity) BP-3 (Availability) BP-2 B 2020 — 2 — 2020-10-19 – p.15/56
16. : 2009 ↑ 11 B 2020 — 2 — 2020-10-19 – p.16/56
17. ( ) ADR (Active (space) Debris Removal) : https://doi.org/10.1109/TCSS.2018.2890655 (1930 ) ( ) B 2020 — 2 — 2020-10-19 – p.17/56
18. ( ) ( ) ( ) B 2020 — 2 — 2020-10-19 – p.18/56
19. ( ) ( - ) : https://doi.org/10.1016/j.future.2019.05.019 B 2020 — 2 — 2020-10-19 – p.19/56
20. ( ) ( ) ( ) B 2020 — 2 — 2020-10-19 – p.20/56
21. ( ) B 2020 — 2 — 2020-10-19 – p.21/56
22. / ( ) ( ) ( ) ( ) B 2020 — 2 — 2020-10-19 – p.22/56
23. ( ) ( ) ( ) B 2020 — 2 — 2020-10-19 – p.23/56
24. ( ) B 2020 — 2 — 2020-10-19 – p.24/56
25. ( ) ( ) B 2020 — 2 — 2020-10-19 – p.25/56
26. B 2020 — 2 — 2020-10-19 – p.26/56
27. with ( ) ( ) ( ) B 2020 — 2 — 2020-10-19 – p.27/56
28. DNS IP AS B 2020 — 2 — 2020-10-19 – p.28/56
29. ( ) ( ) (web ) B 2020 — 2 — 2020-10-19 – p.29/56
30. ( ) ( ) ( ) ( ) ( ) ( ) B 2020 — 2 — 2020-10-19 – p.30/56
31. ( ) ( ) 3D B 2020 — 2 — 2020-10-19 – p.31/56
32. : Ethereum macOS (Catalina 10.15.7) + Homebrew Homebrew Linux (Ubuntu 18.04) Windows 10 + Windows Subsystem for Linux (Ubuntu 18.04 ) WSL Ethereum solidity brownie B 2020 — 2 — 2020-10-19 – p.32/56
33. Solidity Ethereum http://solidity.readthedocs.io/en/latest/installing-solidity.html Linux (on Windows) “sudo apt”, macOS “brew” solc 0.7.3 (10/10 ) $ solc --version brownie py-solc-x solc (dependencies) ( solc py-solc-x ) B 2020 — 2 — 2020-10-19 – p.33/56
34. Python3 macOS $ brew install python3 Linux $ sudo add-apt-repository ppa:deadsnakes/ppa $ sudo apt update $ sudo apt install python3.8 python3.8-dev python3.8-venv python3.8-tk 16.10 python3(.8) apt B 2020 — 2 — 2020-10-19 – p.34/56
35. macOS : . . . macOS wget brew dyld: Library not loaded: /usr/local/opt/gettext/lib/libintl.8.dylib $ brew uninstall --force gettext $ brew install gettext B 2020 — 2 — 2020-10-19 – p.35/56
36. Python (venv) macOS ‘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 2020 — 2 — 2020-10-19 – p.36/56
37. Ganache CLI Ethereum RPC CLI : Command Line Interface 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 2020 — 2 — 2020-10-19 – p.37/56
38. Brownie Python Ethereum https://eth-brownie.readthedocs.io Brownie $ pip install eth-brownie version 1.11.8 (10/10 ) B 2020 — 2 — 2020-10-19 – p.38/56
39. $ brownie init ( ERC-20 ) $ brownie bake token $ cd token ( ) $ brownie compile ( ) $ pytest tests B 2020 — 2 — 2020-10-19 – p.39/56
40. Brownie $ brownie console Python >>> len(accounts) 10 >>> accounts[0].balance() 100000000000000000000 >>> quit() B 2020 — 2 — 2020-10-19 – p.40/56
41. ( ) Ethereum ropsten B 2020 — 2 — 2020-10-19 – p.41/56
42. 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 2020 — 2 — 2020-10-19 – p.42/56
43. 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 2020 — 2 — 2020-10-19 – p.43/56
44. 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 2020 — 2 — 2020-10-19 – p.44/56
45. Ethereum B 2020 — 2 — 2020-10-19 – p.45/56
46. Ethereum Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT & DECENTRALIZED APPLICATION PLATFORM” 15 (= ) = ⇒ → Dapps ( / / ) B 2020 — 2 — 2020-10-19 – p.46/56
47. B 2020 — 2 — 2020-10-19 – p.47/56
48. . . . B 2020 — 2 — 2020-10-19 – p.48/56
49. vs. B 2020 — 2 — 2020-10-19 – p.49/56
50. = run B 2020 — 2 — 2020-10-19 – p.50/56
51. Ether Ethereum EOA : Externally-Owned Account ( ) Ether EVM EVM B 2020 — 2 — 2020-10-19 – p.51/56
52. EVM : Ethereum Virtual Machine Gas B 2020 — 2 — 2020-10-19 – p.52/56
53. EVM : : Solidity — JavaScript LLL — Lisp Vyper — Python B 2020 — 2 — 2020-10-19 – p.53/56
54. Solidity ( ) pragma solidityˆ0.5.0; 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 2020 — 2 — 2020-10-19 – p.54/56
55. Ethereum B 2020 — 2 — 2020-10-19 – p.55/56
56. B 2020 — 2 — 2020-10-19 – p.56/56