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
怖いスマートコントラクト
Search
wshino
November 27, 2017
Programming
200
0
Share
怖いスマートコントラクト
2017/11/20 DMM.com labo で発表した内容です。
The DAO事件、ParityのMulti-Sig Walletのバグによる、盗難、凍結について解説しています。
wshino
November 27, 2017
More Decks by wshino
See All by wshino
Past, Present and Future
wshino
1
480
libp2p
wshino
7
1.3k
Superiority of Rust
wshino
3
390
Try Cross Compile Then Fail
wshino
0
160
GORMOS - A high performance and scalable design for decentralized applications -
wshino
4
1.9k
DAppのデプロイ戦略 / DApp Deployment Strategy
wshino
3
1.8k
Sharding
wshino
4
1.1k
Plasma Debit
wshino
2
2k
ブロックチェーン技術の登場とスマートコントラクト化する社会
wshino
5
5.4k
Other Decks in Programming
See All in Programming
Augmenting AI with the Power of Jakarta EE
ivargrimstad
0
410
How We Practice Exploratory Testing in Iterative Development( #scrumniigata ) / 反復開発の中で、探索的テストをどう実施しているか
teyamagu
PRO
3
820
「OSSがあるなら自作するな」は AI時代も正しいか ── Build vs Adopt の新しい判断基準
kumorn5s
7
2.6k
Skillは並べた。動かなかった。契約で繋いだ。— 65個のSkillから、自走する開発サイクルへ
junholee
0
500
AIを導入する前にやるべきこと
negima
2
350
いつか誰かが、と思っていた フロントエンド刷新5年間の実践知
kiichisugihara
1
280
Making the RBS Parser Faster
soutaro
0
710
(Re)make Regexp in Ruby: Democratizing internals for the JIT
makenowjust
3
1.1k
KMP × Kotlin 2.3 - How Android Got Slower While iOS Builds Improved by 47%
rio432
0
180
SkillsをS3 Filesに置く時のあれこれ
watany
3
1.6k
Back to the roots of date
jinroq
0
830
サプライチェーン攻撃対策「層を重ねて落ちない壁」を10日間で組み上げた話 #TechLeadConf2026
kashewnuts
1
270
Featured
See All Featured
Reality Check: Gamification 10 Years Later
codingconduct
0
2.1k
Winning Ecommerce Organic Search in an AI Era - #searchnstuff2025
aleyda
1
2k
技術選定の審美眼(2025年版) / Understanding the Spiral of Technologies 2025 edition
twada
PRO
118
110k
16th Malabo Montpellier Forum Presentation
akademiya2063
PRO
0
120
Technical Leadership for Architectural Decision Making
baasie
3
360
Art, The Web, and Tiny UX
lynnandtonic
304
21k
The innovator’s Mindset - Leading Through an Era of Exponential Change - McGill University 2025
jdejongh
PRO
1
170
How to Create Impact in a Changing Tech Landscape [PerfNow 2023]
tammyeverts
55
3.3k
The browser strikes back
jonoalderson
0
1k
Building Better People: How to give real-time feedback that sticks.
wjessup
370
20k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
47
8.1k
Marketing to machines
jonoalderson
1
5.3k
Transcript
BEERBASH 2017/11/20 ා͍εϚʔτίϯτϥΫτ SHINOHARA WATARU
ࢲ Ϗοάσʔλ෦ ϨίϝϯυνʔϜ Kubernetes Spinnaker Istio Scala / Haskell /
PureScript / Golang Blockchain, Ethereum
ETHEREUM ࢄΞϓϦέʔγϣϯͷϓϥοτϑΥʔϜ ϏοτίΠϯͷ࣍ʹن͕େ͖͍ εϚʔτίϯτϥΫτΛಈ͔ͤΔ
εϚʔτίϯτϥΫτ ࣗಈܖ EthereumͰಈ࡞͢ΔϓϩάϥϜ ૹۚͦΕҎ֎ͳΜͰͰ͖Δ
࡞Γํ ϓϩάϥϜΛॻ͘ ϒϩοΫνΣʔϯʹσϓϩΠ͢Δ ☺
ར νϡʔϦϯάશ ঢ়ଶΛ࣋ͭ͜ͱ͕Ͱ͖Δ ࣗ༝͕ߴ͍
ࢭΊΔΈΛೖΕͳ͍ͱࢭΊΒΕͳ͍ ফ͢Α͏ʹ࡞Βͳ͍ͱফͤͳ͍ σϓϩΠͨ͠ΒมߋͰ͖ͳ͍ ͦͷίʔυɺਖ਼͘͠ಈ͖·͔͢
τϨʔυΦϑ ࣗ༝⤴ όάͷةݥੑ⤴
ຊʹ͋ͬͨා͍ The DAOࣄ݅ 2017 Parityͷόά⛱ 2017 Parityͷόά⛄
THE DAO The DAO = ΫϥυϑΝϯσΟϯάΈ͍ͨͳͭ ඇதԝूݖ 20166݄17 52ԯԁͷඃ
THE DAO #1 splitDAO DAOʹࢍಉ͠ͳ͍߹ʹɺ৽͍͠DAOΛ࡞͢ΔػೳΛ ར༻ DAOͷߴ % DAOͷࣗͷߴ &
৽͍͠DAOͷߴ ' ૹۚॲཧΛߦͬͯྃͨ͠Β&ͷߴΛ0ʹ͢Δ ( % → ( → ) & → ( → '
THE DAO #2 withdrawRewardFor splitDAOͷதͰݺͼग़͞ΕΔ &ͷߴΛDAOຊମ%͔Β'ʹ1͚ͩૹۚ͢Δ લड़ͷॲཧΛ࠶ؼͰݺͼग़ͤΔόά ߴݮ͍ͬͯͳ͍ % →
( → ' ɹ% → ( → ' ίϛϡχςΟޙͰ࣏͢͜ͱʹͨ͠
THE DAO Կ͕ى͖͔ͨ % → ( → ' ɹ% →
( → ' ɹɹ% → ( → ' ɹɹɹ% → ( → ' ɹɹɹɹ% → ( → ' ɹɹɹɹɹ% → ( → ' ... % % → (&( &() * 30 → ' '
THE DAO Ͳ͏ͬͯղܾ͔ͨ͠ ৽͘͠࡞ͨ͠DAOͷࢿۚ27ؒಈ͔ͤͳ͍ ߈ܸ͞Εͨྺ࢙Λר͖ͯ͠ແ͔ͬͨ͜ͱʹͨ͠ EthereumͷίϛϡχςΟ͕྾ͨ͠ ) → Ethereum *
→ Ethereum Classic
2017 PARITYͷόά⛱ ϚϧνγάΥϨοτʹෆ۩߹ αʔυύʔςΟͷParity͕։ൃ ΥϨοτͷॳظԽϝιου͕ݺΔ Φʔφʔݖݶ͕ୣΘΕΔ ߈ܸΞΧϯτʹΥϨοτͷશֹΛૹۚ 34ԯԁͷඃ
2017 PARITYͷόά⛱ Ͳ͏ͬͯղܾ͔ͨ͠ ղܾͤͣ 80ԯԁϗϫΠτϋοΧʔ͕อޢ
2017 PARITYͷόά⛄ ϚϧνγάΥϨοτʹෆ۩߹ ར༻͍ͯ͠ΔϥΠϒϥϦ͕ॳظԽ͞Ε͍ͯͳ͍ ॳظԽ͞Ε͍ͯͳ͍ͱॳظԽϝιου͕ݺΔ ϥΠϒϥϦͷΦʔφʔݖݶ͕ୣΘΕΔ ϥΠϒϥϦͷআϝιου͕͋Δɺ͔ͭݺΔ ΥϨοτ͕ͯ͑͢ͳ͘ͳͬͨ 300ԯԁౚ݁
2017 PARITYͷόά⛄ DEVOPS199
2017 PARITYͷόά⛄ DEVOPS199
2017 PARITYͷόά⛄ Ͳ͏ͬͯղܾ͔ͨ͠ ղܾࡦࡧத ౚ݁ͨ͠ࢿۚաڈͷऔҾ͔ΒΘ͔Δ Ϣʔβʔʹฦ࣮͢ͳͲ͕ఏҊ͞Ε͍ͯΔ
·ͱΊ Ethereumѱ͘ͳ͍ ͱ͍͑ϓϩάϥϜʹόά͖ͭͷ ςετϑϨʔϜϫʔΫΛ͏
·ͱΊ ϢʔβʔརӹΛ࠷༏ઌʹߟ͑Δ ·ͩφϨοδ͕ཷ·ͬͯͳ͍ ΊͬͪΌςετ͠Α͏