スマートコントラクトプログラミング (2) イーサリアム (Ethereum) 入門 / Introduction to Ethereum

ブロックチェーンハブ主催で開催している (第2期) スマートコントラクトプログラミング講義 (2) 「イーサリアム (Ethereum) 入門」のスライドです。2017年5月17日(水) に使用しました。

Transcript

1. (Ethereum) (2) CSO / SFC ks91@sfc.wide.ad.jp (Ethereum) – (2) – 2017-05-17 – p.1/33
2. 1. 2. 3. 4. 5. (Ethereum) – (2) – 2017-05-17 – p.2/33
3. 1. 2. 3. 4. 5. (Ethereum) – (2) – 2017-05-17 – p.3/33
4. 1. (Ethereum) – (2) – 2017-05-17 – p.4/33
5. Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT & DECENTRALIZED APPLICATION PLATFORM” 15 (Ethereum) – (2) – 2017-05-17 – p.5/33
6. 2. Mac OS X (Yosemite 10.10.5) + Homebrew Linux (Ubuntu 16.04) Windows 10 + Bash on Ubuntu on Windows geth, solidity populus (Ethereum) – (2) – 2017-05-17 – p.6/33
7. geth GO https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum #installation-instructions geth 1.6.1-stable (5/16 ) $ geth -help (Ethereum) – (2) – 2017-05-17 – p.7/33
8. Solidity http://solidity.readthedocs.io/en/latest/installing-solidity.html solc 0.4.11 (5/16 ) $ solc --version (Ethereum) – (2) – 2017-05-17 – p.8/33
9. Python pip macOS http://qiita.com/zaburo/items/fbdaf6c04151671407db (Homebrew ) http://qiita.com/oct_itmt/items/2d066801a7464a676994 (pyenv ) Ubuntu 16.04 (Ethereum) – (2) – 2017-05-17 – p.9/33
10. Populus Python http://populus.readthedocs.io/en/latest/quickstart.html Open SSL Populus $ pip install populus version 1.6.9 (5/16 ) (Ethereum) – (2) – 2017-05-17 – p.10/33
11. $ populus init contracts/Greeter.sol tests/test_greeter.py $ populus compile $ py.test tests/ (Ethereum) – (2) – 2017-05-17 – p.11/33
12. (1) { "version": "3", "chains": { "bch": { "chain": { "class": "populus.chain.geth.LocalGethChain" }, "web3": { "provider": { "class": "web3.providers.ipc.IPCProvider" } }, "contracts": { "backends": { "JSONFile": {"$ref": "contracts.backends.JSONFile"} } } } } } (Ethereum) – (2) – 2017-05-17 – p.12/33
13. (2) populus.json $ mv populus.json populus.json.std $ mv populus.json.bch populus.json (Ethereum) – (2) – 2017-05-17 – p.13/33
14. $ populus chain run bch (coinbase) 1 chains (Ethereum) – (2) – 2017-05-17 – p.14/33
15. DAG (Directed Acyclic Graph) Ether (Ethereum) – (2) – 2017-05-17 – p.15/33
16. 3. (Ethereum) – (2) – 2017-05-17 – p.16/33
17. (Ethereum) – (2) – 2017-05-17 – p.17/33
18. . . . (Ethereum) – (2) – 2017-05-17 – p.18/33
19. vs. (Ethereum) – (2) – 2017-05-17 – p.19/33
20. = run (Ethereum) – (2) – 2017-05-17 – p.20/33
21. Ether Ethereum EOA : Externally-Owned Account Ether EVM EVM (Ethereum) – (2) – 2017-05-17 – p.21/33
22. EVM : Ethereum Virtual Machine Gas (Ethereum) – (2) – 2017-05-17 – p.22/33
23. EVM : : Solidity — JavaScript LLL — Lisp (Ethereum) – (2) – 2017-05-17 – p.23/33
24. 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 (Ethereum) – (2) – 2017-05-17 – p.24/33
25. (Ethereum) – (2) – 2017-05-17 – p.25/33
26. 4. (Ethereum) – (2) – 2017-05-17 – p.26/33
27. ADEPT ADEPT : IBM IoT (Ethereum) – (2) – 2017-05-17 – p.27/33
28. (Ethereum) – (2) – 2017-05-17 – p.28/33
29. ⇒ (Ethereum) – (2) – 2017-05-17 – p.29/33
30. The DAO ( ) The DAO Split ( ) 360 ETH (50∼60 ) (2016/6/17) ( ) ( ; ) (2016/7/20 ) (Ethereum) – (2) – 2017-05-17 – p.30/33
31. 5. (Ethereum) – (2) – 2017-05-17 – p.31/33
32. Greeter.sol populus ˆC $ populus deploy --chain bch Greeter (Ethereum) – (2) – 2017-05-17 – p.32/33
33. I (Ethereum) – (2) – 2017-05-17 – p.33/33