イーサリアム (Ethereum) 入門 / Introduction to Ethereum

2018年7月11日(水)、ブロックチェーンハブ主催で開催されたブロックチェーンアカデミー「イーサリアム入門」(【ハンズオン】スマートコントラクトプログラミング (1)) にて使用したスライドです。

Transcript

1. (Ethereum) (1) CSO / SFC ( https://speakerdeck.com/ks91 ) ks91@blockchainhub.co.jp (Ethereum) — (1) — 2018-07-11 – p.1/39
2. ( ) CSO (Chief Science Officer) SFC ( ) 1993 ( ) 2006 ( ) SFC 17 P2P (Peer-to-Peer) 2011 → ( ) (Ethereum) — (1) — 2018-07-11 – p.2/39
3. (2017) : SF + + SF (2048 ) 2048 (Ethereum) — (1) — 2018-07-11 – p.3/39
4. 1. 2. 3. 4. 5. (Ethereum) — (1) — 2018-07-11 – p.4/39
5. 1. (Ethereum) — (1) — 2018-07-11 – p.5/39
6. ( ) (1) (2) (3) (4) ( ) state machine replication (Ethereum) — (1) — 2018-07-11 – p.6/39
7. 1) 2) 3) ⇒ ⇒ · / (dependable ) (Ethereum) — (1) — 2018-07-11 – p.7/39
8. /DLT ( ) Bitcoin ( ) Open Assets Protocol (OAP) ( ) Ethereum ( ) ( ) Enterprise Ethereum Alliance (↓ ) (DLT) ( ) Hyperledger (Linux Foundation) Fabric (IBM/DAH), Sawtooth (Intel), Iroha ( ) Corda (R3), Tangle (IOTA), . . . , BBc-1 ( ) (Ethereum) — (1) — 2018-07-11 – p.8/39
9. /DLT ( ) ( ) ( vs. ) ( ) ( ) ( ) ⇒ ( : BBc-1) DLT : : (Ethereum) — (1) — 2018-07-11 – p.9/39
10. Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT & DECENTRALIZED APPLICATION PLATFORM” 15 (Ethereum) — (1) — 2018-07-11 – p.10/39
11. 2. macOS (High Sierra 10.13) + Homebrew Linux (Ubuntu 16.04) Windows 10 + Windows Subsystem for Linux geth, solidity populus (Ethereum) — (1) — 2018-07-11 – p.11/39
12. geth GO https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum #installation-instructions geth 1.8.12-stable (7/10 ) $ geth -help (Ethereum) — (1) — 2018-07-11 – p.12/39
13. Solidity http://solidity.readthedocs.io/en/latest/installing-solidity.html solc 0.4.24 (7/10 ) $ solc --version (Ethereum) — (1) — 2018-07-11 – p.13/39
14. Python3 macOS $ brew install python3 Linux $ sudo add-apt-repository ppa:deadsnakes/ppa $ sudo apt update $ sudo apt install python3.6 python3.6-dev python3.6-venv 16.10 python3 apt (Ethereum) — (1) — 2018-07-11 – p.14/39
15. Python (venv) macOS ‘python3.6’ ‘python3’ $ python3.6 -m venv popenv $ source popenv/bin/activate (popenv) $ pip install -U pip (popenv) $ deactivate (Ethereum) — (1) — 2018-07-11 – p.15/39
16. Populus Python http://populus.readthedocs.io/en/latest/quickstart.html Open SSL Populus $ pip install populus==2.1.0 $ pip install -U web3==3.16.5 $ pip install -U eth-utils==0.7.4 version 2.1.0 (Ethereum) — (1) — 2018-07-11 – p.16/39
17. $ populus init contracts/Greeter.sol tests/test_greeter.py $ populus compile $ py.test . (Ethereum) — (1) — 2018-07-11 – p.17/39
18. (1) http://beyond-blockchain.org/public/BcH-smart-contract-programming.zip Python (init.py, run.py, deploy.py) project.json genesis.json $ python init.py $ touch MyToken.sol (Ethereum) — (1) — 2018-07-11 – p.18/39
19. (2) $ geth init genesis.json $ geth account new 16 (Ethereum) — (1) — 2018-07-11 – p.19/39
20. “run.py” ‘--etherbase’ 0x ( run.py): http://beyond-blockchain.org/public/modified_run_py.zip $ python run.py $ tail -f geth.log process id kill (Ethereum) — (1) — 2018-07-11 – p.20/39
21. DAG (Directed Acyclic Graph) Ether (Ethereum) — (1) — 2018-07-11 – p.21/39
22. 3. (Ethereum) — (1) — 2018-07-11 – p.22/39
23. (Ethereum) — (1) — 2018-07-11 – p.23/39
24. . . . (Ethereum) — (1) — 2018-07-11 – p.24/39
25. vs. (Ethereum) — (1) — 2018-07-11 – p.25/39
26. = run (Ethereum) — (1) — 2018-07-11 – p.26/39
27. Ether Ethereum EOA : Externally-Owned Account Ether EVM EVM (Ethereum) — (1) — 2018-07-11 – p.27/39
28. EVM : Ethereum Virtual Machine Gas (Ethereum) — (1) — 2018-07-11 – p.28/39
29. EVM : : Solidity — JavaScript LLL — Lisp (Ethereum) — (1) — 2018-07-11 – p.29/39
30. Solidity ( ) pragma solidity ˆ0.4.24; contract IndivisibleAsset { /* */ string public _name; string public _symbol; uint256 public _quantity; address public _owner; constructor (string name, string symbol, uint256 quantity) public { _name = name; _symbol = symbol; _quantity = quantity; _owner = msg.sender; } function transfer(address to) external returns (bool) { require(_owner == msg.sender); _owner = to; return true; } } (Ethereum) — (1) — 2018-07-11 – p.30/39
31. (Ethereum) — (1) — 2018-07-11 – p.31/39
32. 4. (Ethereum) — (1) — 2018-07-11 – p.32/39
33. ADEPT ADEPT : IBM IoT (Ethereum) — (1) — 2018-07-11 – p.33/39
34. (Ethereum) — (1) — 2018-07-11 – p.34/39
35. ⇒ (Ethereum) — (1) — 2018-07-11 – p.35/39
36. The DAO ( ) The DAO Split ( ) 360 ETH (50∼60 ) (2016/6/17) ( ) ( ; ) (2016/7/20 ) (Ethereum) — (1) — 2018-07-11 – p.36/39
37. 5. (Ethereum) — (1) — 2018-07-11 – p.37/39
38. Greeter.sol “deploy.py” __main__ Greeter 0x & $ python deploy.py (Ethereum) — (1) — 2018-07-11 – p.38/39
39. I : ERC20 ∼ ∼ (Ethereum) — (1) — 2018-07-11 – p.39/39