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イーサリアムとスマートコントラクト / Ethereum and Smart Contracts
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Kenji Saito
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July 19, 2017
Technology
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880
イーサリアムとスマートコントラクト / Ethereum and Smart Contracts
ブロックチェーンハブ主催で開催しているブロックチェーン基盤技術講義『イーサリアムとスマートコントラクト』のスライドです。2017年7月19日(水) に使用しました。
Kenji Saito
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July 19, 2017
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Transcript
CSO / SFC
[email protected]
— — 2017-07-19 – p.1/40
( ) SFC ( ) CSO (Chief Science Officer) CEO
1993 M.Eng ( ) 2006 ( ) SFC 16 P2P 2011 → ( ) — — 2017-07-19 – p.2/40
(EVM) — — 2017-07-19 – p.3/40
1. 2. (Ethereum) 3. 4. 5. OS 6. — —
2017-07-19 – p.4/40
1. — — 2017-07-19 – p.5/40
— — 2017-07-19 – p.6/40
. . . — — 2017-07-19 – p.7/40
vs. — — 2017-07-19 – p.8/40
1. ⇒ ( ) ⇒ 2. ⇒ ⇒ 3. ⇒
— — 2017-07-19 – p.9/40
(by ) 1. 2. ( ) ( ) . .
. cf. by McLuhan cf. by McLuhan — — 2017-07-19 – p.10/40
⇒ : ⇒ — — 2017-07-19 – p.11/40
⇒ : ⇒ — — 2017-07-19 – p.12/40
2. (Ethereum) EVM (Ethereum Virtual Machine) — — 2017-07-19 –
p.13/40
Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT
& DECENTRALIZED APPLICATION PLATFORM” 15 — — 2017-07-19 – p.14/40
= run — — 2017-07-19 – p.15/40
Ether Ethereum EOA : Externally-Owned Account Ether EVM EVM —
— 2017-07-19 – p.16/40
EVM : Ethereum Virtual Machine Gas — — 2017-07-19 –
p.17/40
3. — — 2017-07-19 – p.18/40
EVM : . . . : Solidity — JavaScript LLL
— Lisp — — 2017-07-19 – p.19/40
Solidity ( ) pragma solidity ˆ0.4.8; contract IndivisibleAsset { /*
*/ string public _name; string public _symbol; uint256 public _quantity; address public _owner; function IndivisibleAsset(string name, string symbol, uint256 quantity) { _name = name; _symbol = symbol; _quantity = quantity; _owner = msg.sender; } function transfer(address to) { if (_owner != msg.sender) { throw; } _owner = to; } } — — 2017-07-19 – p.20/40
Solidity JavaScript ( , ) (constructor) ( ) ( )
Ether — — 2017-07-19 – p.21/40
— — 2017-07-19 – p.22/40
4. ADEPT — — 2017-07-19 – p.23/40
ADEPT ADEPT : IBM IoT → — — 2017-07-19 –
p.24/40
. . . — — 2017-07-19 – p.25/40
⇒ — — 2017-07-19 – p.26/40
The DAO ( ) The DAO Split ( ) 360
ETH (50∼60 ) (2016/6/17) ( ) ( ; ) (2016/7/20 ) — — 2017-07-19 – p.27/40
5. OS — — 2017-07-19 – p.28/40
OS (2007) — — 2017-07-19 – p.29/40
OS ↑ cf. NPO/NGO — — 2017-07-19 – p.30/40
OS — — 2017-07-19 – p.31/40
Uber — — 2017-07-19 – p.32/40
Uber Uber P2P + Uber — — 2017-07-19 – p.33/40
6. / . . . — — 2017-07-19 – p.34/40
( ) / / — — 2017-07-19 – p.35/40
— 1. ( ) 2. ( ) 3. ( )
— — 2017-07-19 – p.36/40
Communicating Promises in the Air CPA : Communicating Promises in
the Air etc. → — — 2017-07-19 – p.37/40
10 12 → 120 120 12 12 120 — —
2017-07-19 – p.38/40
— — 2017-07-19 – p.39/40
— — 2017-07-19 – p.40/40