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ブロックチェーン連続講義 第2-7回 スマートコントラクト / Smart Contracts
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Kenji Saito
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September 16, 2016
Technology
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ブロックチェーン連続講義 第2-7回 スマートコントラクト / Smart Contracts
ブロックチェーンハブ主催で開催している第2期ブロックチェーン連続講義の第7回「スマートコントラクト」のスライドです。2016年9月16日(金) に使用しました。
Kenji Saito
PRO
September 16, 2016
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Transcript
2 7 SFC / CSO
[email protected]
— 2016-09-16 – p.1/42
(EVM) — 2016-09-16 – p.2/42
1. 2. (Ethereum) 3. 4. OS — 2016-09-16 – p.3/42
1. — 2016-09-16 – p.4/42
— 2016-09-16 – p.5/42
. . . — 2016-09-16 – p.6/42
— 2016-09-16 – p.7/42
. 1. 2. 3. — 2016-09-16 – p.8/42
— 2016-09-16 – p.9/42
1 ⇒ — 2016-09-16 – p.10/42
CSP CSP : Communicating Sequential Processes : VendingMachine = coin
→ choc → STOP Person = (coin → STOP) [] (card → STOP) . . . VendingMachine |[{coin,card}]| Person ≡ coin → choc → STOP — 2016-09-16 – p.11/42
2 ⇒ — 2016-09-16 – p.12/42
vs. — 2016-09-16 – p.13/42
3 ⇒ — 2016-09-16 – p.14/42
1. ⇒ ( ) 2. ⇒ 3. ⇒ — 2016-09-16
– p.15/42
(by ) 1. 2. ( ) ( ) . .
. cf. by McLuhan cf. by McLuhan — 2016-09-16 – p.16/42
: ⇒ — 2016-09-16 – p.17/42
: ⇒ — 2016-09-16 – p.18/42
2. (Ethereum) EVM (Ethereum Virtual Machine) — 2016-09-16 – p.19/42
Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT
& DECENTRALIZED APPLICATION PLATFORM” 12 — 2016-09-16 – p.20/42
= run — 2016-09-16 – p.21/42
Ether Ethereum EOA : Externally-Owned Account Ether EVM EVM —
2016-09-16 – p.22/42
EVM : Ethereum Virtual Machine Gas — 2016-09-16 – p.23/42
EVM : : Solidity — JavaScript LLL — Lisp —
2016-09-16 – p.24/42
Solidity contract metaCoin { mapping (address => uint) balances; function
metaCoin() { balances[msg.sender] = 10000; } function sendCoin(address receiver, uint amount) returns(bool sufficient) { if (balances[msg.sender] < amount) return false; balances[msg.sender] -= amount; balances[receiver] += amount; return true; } } by hshimo — 2016-09-16 – p.25/42
Solidity JavaScript ( , ) (constructor) ( ) ( )
Ether — 2016-09-16 – p.26/42
— 2016-09-16 – p.27/42
3. ADEPT — 2016-09-16 – p.28/42
ADEPT ADEPT : IBM IoT — 2016-09-16 – p.29/42
— 2016-09-16 – p.30/42
⇒ — 2016-09-16 – p.31/42
The DAO ( ) The DAO Split ( ) 360
ETH (50∼60 ) (6/17) ( ) ( ; ) (7/20 ) — 2016-09-16 – p.32/42
4. OS — 2016-09-16 – p.33/42
OS (2007) — 2016-09-16 – p.34/42
OS ↑ cf. NPO/NGO — 2016-09-16 – p.35/42
OS — 2016-09-16 – p.36/42
Uber — 2016-09-16 – p.37/42
Uber Uber — 2016-09-16 – p.38/42
/ . . . — 2016-09-16 – p.39/42
10 12 → 120 120 12 12 120 — 2016-09-16
– p.40/42
— 2016-09-16 – p.41/42
10 — 2016-09-16 – p.42/42