Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
ブロックチェーン概論 / Introduction to Blockchain
Search
Kenji Saito
PRO
October 11, 2021
Technology
0
180
ブロックチェーン概論 / Introduction to Blockchain
2021年10月11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1回で使用されたスライドです。
Kenji Saito
PRO
October 11, 2021
Tweet
Share
More Decks by Kenji Saito
See All by Kenji Saito
ゼミ紹介 : 公共の利益のためのデジタルトランスフォーメーション / Zemi Introduction : Digital Transformation for Public Good
ks91
PRO
0
25
強者の側にいたら『テクノロジーで不自由なく』ではない / If you side with the powerful, then it is not like people can live without any inconvenience because of the technology.
ks91
PRO
0
54
アカデミーキャンプ 2024冬「都の西北でAI(アイ) を叫ぶ(準備編)」DAY 2 / Academy Camp 2024 Winter "Shouting AI in the Northwest of the Capital" DAY 2
ks91
PRO
0
42
アカデミーキャンプ 2024冬「都の西北でAI(アイ) を叫ぶ(準備編)」DAY 1 / Academy Camp 2024 Winter "Shouting AI in the Northwest of the Capital" DAY 1
ks91
PRO
0
40
続・衣食住をテクノロジーで不自由なく / Technology Ensures Food, Clothing, and Housing
ks91
PRO
0
43
ブロックチェーン技術の来し方行く末 / The Coming and Going of Blockchain Technology
ks91
PRO
0
44
言うことを聞かないこどもたちになってもらうためのAI活用論 / Using AI to Prevent Children from Listening to Others
ks91
PRO
0
74
LaTeX と Overleaf によるショートペーパー作成 / Short Paper Writing with LaTeX and Overleaf
ks91
PRO
0
36
GPT-4 を用いたデータ分析 / Data Analysis Using GPT-4
ks91
PRO
0
50
Other Decks in Technology
See All in Technology
理想の組織も自分たちで作ろう! ―LayerXの「全員採用」を支える文化 / How to create our own ideal team
ar_tama
7
2.5k
複数の LLM モデルを扱う上で直面した辛みまとめ
kazuyaseki
1
210
今さら聞けない!? AWSの生成AIサービス Amazon Bedrock入門!
minorun365
PRO
11
1.7k
BDD(Cucumber)コミュニティが無料提供しているコンテンツの紹介と現在起きている危機
nihonbuson
4
720
LLMプロダクト事業の立ち上げにおける挑戦
layerx
PRO
7
1.4k
バッチ処理のSLOをどう設計するか
rynsuke
7
540
MongoDB Atlas Vectorsearchではじめる生成AIアプリ開発
chie8842
3
500
技術イベントはなんとかひねり出す 日経の技術広報の取り組み/techpr3
nishiuma
0
220
Ask-LLM論文紹介: How to Train Data-Efficient LLMs
s_ota
0
110
マイクロサービス環境におけるDB戦略 in DMMプラットフォーム
pospome
11
3k
KubeCon EU: Unlocking new Platform Experiences with Open Interfaces
salaboy
1
360
サービス成長と共に肥大化するモノレポ、長くなるCI時間 / As services grow, monorepos get bigger and CI time gets longer
kohbis
5
2k
Featured
See All Featured
How To Stay Up To Date on Web Technology
chriscoyier
781
250k
Pencils Down: Stop Designing & Start Developing
hursman
115
11k
Adopting Sorbet at Scale
ufuk
66
8.5k
[RailsConf 2023] Rails as a piece of cake
palkan
21
3.8k
Building Flexible Design Systems
yeseniaperezcruz
317
37k
JazzCon 2018 Closing Keynote - Leadership for the Reluctant Leader
reverentgeek
178
11k
Into the Great Unknown - MozCon
thekraken
10
830
The Invisible Side of Design
smashingmag
293
49k
Imperfection Machines: The Place of Print at Facebook
scottboms
257
12k
Atom: Resistance is Futile
akmur
258
25k
Code Review Best Practice
trishagee
54
15k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
28
5.9k
Transcript
B 2021 1 ( ) B 2021 — 1 —
2021-10-11 – p.1/69
https://speakerdeck.com/ks91 ( ) ( ) Discord Discord ( / /
) Zoom URL ( ) B 2021 — 1 — 2021-10-11 – p.2/69
( ) SFC ( ) CSO (Chief Science Officer) 1993
( ) 2006 ( ) SFC 21 P2P (Peer-to-Peer) 2011 2018 2019 VR 2021.7 , VR 2021.8 “ALL THESE WORLDS ARE YOURS”, VR 2021.9 & ( (VR) ) → ( ) B 2021 — 1 — 2021-10-11 – p.3/69
VR VR B 2021 — 1 — 2021-10-11 – p.4/69
VR 2021.7 (2030 ) B 2021 — 1 — 2021-10-11
– p.5/69
VR 2021.8 “ALL THESE WORLDS ARE YOURS” 2040 2 .
. . B 2021 — 1 — 2021-10-11 – p.6/69
VR 2021.8 “ALL THESE WORLDS ARE YOURS” 2 . .
. (VRChat COMMUNITY LABS “Europa” ) B 2021 — 1 — 2021-10-11 – p.7/69
VR 2021.9 & 6 B 2021 — 1 — 2021-10-11
– p.8/69
DNA (1) Ԙج σΦΩγ ϦϘʔε 5’ 3’ 5’ 5’ 3’
4’ 3’ 2’ 1’ Ϧϯࢎ $ $ $ " " " 5 5 5 ( ( ( DNA = ( + ( ) + )* ( ) ( ) ′ ( ) DNA CG https://youtu.be/7Hk9jct2ozY?t=147 DNA/RNA (3′ → 5′ ) 5′ → 3′ ( ) 5′ → 3′ 3′ → 5′ B 2021 — 1 — 2021-10-11 – p.9/69
DNA (2) ` ` ` ` ` ` ` `
ͷૹΓํ ઌߦ͢Δ ΕΔ ͷૹΓํ ෳϑΥʔΫ %/" ϙϦϝϥʔθ సࣸث Ԭ࡚ϑϥάϝϯτ ʹ༧͞Ε ʹൃݟ ᶃ ᶄ ᶅ %/" ϙϦϝϥʔθ సࣸث ( 100 ) B 2021 — 1 — 2021-10-11 – p.10/69
VR 2021.9 & DNA RNA DNA 3D B 2021 —
1 — 2021-10-11 – p.11/69
. . . ( ) 2018 1 2 2018 OK
Google, Google ( ) Python (2020 ) ( ) ∈ Alexa, B 2021 — 1 — 2021-10-11 – p.12/69
Alexa, ত࣌ ੈلޙ ࣾձγεςϜ ࣾձڥ ػց ٕज़ ਓؒ ࣗಈγεςϜ ྩ࣌
ੈلલ ిؾ͚ͭͯ ͍ ͍ ిؾ͚ͭͯ ͜ͷ݅ͷͱ͖ ٕज़Ͱ͋Γࣾձڥˠࣗવڥ ਓ ⇒ ( ) B 2021 — 1 — 2021-10-11 – p.13/69
— ( ) ( ) “FinTech — Financial Innovation and
the Internet” ( ) ( ) ( ) B — (2020 ∼) ( ) → ( ) https://speakerdeck.com/ks91 B 2021 — 1 — 2021-10-11 – p.14/69
(1) 2020 9 60 (2020) : ( ) . .
. = ( ) B 2021 — 1 — 2021-10-11 – p.15/69
(2) (2020) : ( ) B 2021 — 1 —
2021-10-11 – p.16/69
Python 3 Ethereum B 2021 — 1 — 2021-10-11 –
p.17/69
B 2021 — 1 — 2021-10-11 – p.18/69
(1/2) — World Wide Web SARS-CoV-2 COVID-19 2020 1990 World
Wide Web End-to-End ( ) ( ) ( ) End-to-End ( ) 2008 B 2021 — 1 — 2021-10-11 – p.19/69
(2/2) — 2020 ( ) B 2021 — 1 —
2021-10-11 – p.20/69
← Python Flask (Python ) Ethereum Brownie (Python Ethereum )
BBc-1 ( ) B 2021 — 1 — 2021-10-11 – p.21/69
( 2 ) ( ) Discord miro VR Discord miro
( ) ( : ) . . . : ( ) : DApp ( ) B 2021 — 1 — 2021-10-11 – p.22/69
( ) 25% 25% 20% 30% ( ) B 2021
— 1 — 2021-10-11 – p.23/69
( ) 1 10 11 • 2 10 18 3
10 25 1 4 11 1 2 5 11 8 1 6 11 15 2 7 11 22 8 11 29 11/22 ← KMD Discord B 2021 — 1 — 2021-10-11 – p.24/69
1. 2. Ethereum 3. ↑ B 2021 — 1 —
2021-10-11 – p.25/69
/ STAND ALONE COMPLEX Yes. B 2021 — 1 —
2021-10-11 – p.26/69
( ) ੪౻ 0DVMVT2VFTU खݩͷΩʔϘʔυ ࣮ߦ )%.* #MVFUPPUI #MVFUPPUI खݩͷτϥοΫϘʔϧ
.BD1SP ͷલͷσΟεϓϨΠ എޙͷ..BD#PPL"JS "QQMF 3FNPUF%FTLUPQ 0DVMVT 3FNPUF%FTLUPQ )PSJ[PO8PSLSPPNT VT2VFTU MacBook Air B 2021 — 1 — 2021-10-11 – p.27/69
1. B 2021 — 1 — 2021-10-11 – p.28/69
( ) ( ) ( ) ↓ ( ( ))
(BP : Blockchain Property ) BP-1 : ( ) BP-2 : ( ( ) ) BP-3 : ( ) ( ) ( ) B 2021 — 1 — 2021-10-11 – p.29/69
( ) (LIFO : Last In, First Out) ( )
B 2021 — 1 — 2021-10-11 – p.30/69
( ) ( ) ( ) ( ) ( 16
) SHA (Secure Hash Algorithm) ( ) 1bit B 2021 — 1 — 2021-10-11 – p.31/69
( ) ( ) < , > ( ) ←
: < , > : : < , , > : OK ( 1 ) NG ( ) B 2021 — 1 — 2021-10-11 – p.32/69
BP-1 ( ), BP-2 ( ) BBc-1 f : →
BP-3 ( ) ( ) ( ) ← BP-2 ← BP-3 ( ) (BP-2 ) ( ) ← BP-3 (?) + ← BP-{1,2} B 2021 — 1 — 2021-10-11 – p.33/69
[Lamport 1984][Schneider 1990] (1) (2) (3) (4) ( ) ←
↑ B 2021 — 1 — 2021-10-11 – p.34/69
TX : transaction ( 4 TX ) SMRP (State Machine
Replication Problem) SMRP-1 ( ) SMRP-2 : B 2021 — 1 — 2021-10-11 – p.35/69
( ) ( ) ϒϩοΫ൪߸O ϒϩοΫ൪߸O ϒϩοΫ൪߸O ϒϩοΫ൪߸O
ϒϩοΫ൪߸O ϒϩοΫ൪߸O ϒϩοΫ൪߸O ϒϩοΫ൪߸O ͍ͪΜهɾॻ͖͑ͷίετ͕ߴ͍ྺ࢙ ࠷վ͟Μ͠ʹ͍͘ྺ࢙ ͕༗ޮ ͻͱͭखલͷϒϩοΫͷ ʮμΠδΣετʯ σδλϧॺ໊͞Εͨ ʮτϥϯβΫγϣϯ औҾ ʯ ϒϩοΫΛ࡞ΔͨΊʹɺͦͷʮμΠδΣετʯ͕͋ΔҎԼͱ͍͏݅Λຬͨͨ͠Γ 1SPPGPG8PSL Ծ௨՟ͷ࣋ͪʹԠͨ͡ݖརΛͬͨථͰউͬͨΓ 1SPPGPG4UBLF ͢Δඞཁ͕͋Δ ίετ͕͔͔Δ ϒϩοΫΛ࡞ΔਓͦͷதʹࣗʹѼͯͨ Ծ௨՟ͰͷใुΛॻ͖ࠐΉ͜ͱ͕Ͱ͖ɺ ͦͷϒϩοΫ͕༗ޮͳྺ࢙ͷதʹ͋Δ߹ʹ ݶΓใु༗ޮͱͳΔ τϥϯβΫγϣϯͷଘࡏΛ֬ೝ͢Δ ͨΊͷޮతͳํ๏͕ఏڙ͞ΕΔ ਖ਼ੑ ଘࡏੑ །Ұੑ Proof of Work ( ) . . . → B 2021 — 1 — 2021-10-11 – p.36/69
(BP-3 ) ( : ) (BP-3 ) ( : )
← NFT BP-{1,2,3} BP-{1, 2} ⇒ B 2021 — 1 — 2021-10-11 – p.37/69
(Confidentiality) BP-{1,2,3} ↑ ( = ) (Integrity) BP-3 (Availability) BP-2
B 2021 — 1 — 2021-10-11 – p.38/69
2009 ↑ 12 ( 5 ) B 2021 — 1
— 2021-10-11 – p.39/69
( ) ADR (Active (space) Debris Removal) : https://doi.org/10.1109/TCSS.2018.2890655 (1930
) ( ) B 2021 — 1 — 2021-10-11 – p.40/69
( ) ( ) ( ) B 2021 — 1
— 2021-10-11 – p.41/69
( ) ( - ) : https://doi.org/10.1016/j.future.2019.05.019 B 2021 —
1 — 2021-10-11 – p.42/69
( ) ( ) ( ) B 2021 — 1
— 2021-10-11 – p.43/69
( ) B 2021 — 1 — 2021-10-11 – p.44/69
/ ( ) ( ) ( ) ( ) B
2021 — 1 — 2021-10-11 – p.45/69
( ) ( ) ( ) B 2021 — 1
— 2021-10-11 – p.46/69
( ) : https://www.lij.jp/html/jli/jli_2017/ 2017summer_p018.pdf B 2021 — 1 —
2021-10-11 – p.47/69
( ) ( ) B 2021 — 1 — 2021-10-11
– p.48/69
B 2021 — 1 — 2021-10-11 – p.49/69
with ( ) ( ) : https://doi.org/10.1016/j.icte.2021.08.012 ( ) B
2021 — 1 — 2021-10-11 – p.50/69
DNS : https://arxiv.org/abs/2011.05442 ( ) IP AS B 2021 —
1 — 2021-10-11 – p.51/69
( ) ( ) : https://arxiv.org/abs/2011.05442 ( ) : https://doi.org/10.1016/j.icte.2021.08.012
(web ) B 2021 — 1 — 2021-10-11 – p.52/69
( ) ( ) ( ) : https://doi.org/10.1016/j.icte.2021.08.012 ( )
( ) ( ) : https://arxiv.org/abs/2011.05442 B 2021 — 1 — 2021-10-11 – p.53/69
( ) ( ) : https://arxiv.org/abs/2011.05442 3D HACCP ( )
B 2021 — 1 — 2021-10-11 – p.54/69
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 — 1 — 2021-10-11 – p.55/69
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 — 1 — 2021-10-11 – p.56/69
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 — 1 — 2021-10-11 – p.57/69
Python3 macOS $ brew install
[email protected]
python3 python 3.9 (12/2
) 3.9 3.8 3.9 $ brew uninstall --ignore-dependencies
[email protected]
$ brew install
[email protected]
/usr/local/opt/
[email protected]
/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 — 1 — 2021-10-11 – p.58/69
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 — 1 — 2021-10-11 – p.59/69
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 — 1 — 2021-10-11 – p.60/69
Brownie Python Ethereum https://eth-brownie.readthedocs.io Brownie $ pip install eth-brownie version
1.16.4 (10/6 ) B 2021 — 1 — 2021-10-11 – p.61/69
$ brownie init ( ERC-20 ) $ brownie bake token
$ cd token B 2021 — 1 — 2021-10-11 – p.62/69
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 — 1 — 2021-10-11 – p.63/69
Brownie $ brownie console Python >>> len(accounts) 10 >>> accounts[0].balance()
100000000000000000000 >>> quit() B 2021 — 1 — 2021-10-11 – p.64/69
3. Ethereum ropsten B 2021 — 1 — 2021-10-11 –
p.65/69
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 — 1 — 2021-10-11 – p.66/69
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 — 1 — 2021-10-11 – p.67/69
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 — 1 — 2021-10-11 – p.68/69
B 2021 — 1 — 2021-10-11 – p.69/69