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

2018年10月24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「【ハンズオン】スマートコントラクトプログラミング(1) イーサリアム(Ethereum)入門」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.1/38
2. ( ) SFC ( ) CSO (Chief Science Officer) 1993 ( ) 2006 ( ) SFC 18 P2P (Peer-to-Peer) 2011 SFC 2018 → ( ) (Ethereum) — (1) — 2018-07-11 – p.2/38
3. 1. 2. 3. 4. 5. (Ethereum) — (1) — 2018-07-11 – p.3/38
4. 1. (Ethereum) — (1) — 2018-07-11 – p.4/38
5. ( ) (1) (2) (3) (4) ( ) state machine replication (Ethereum) — (1) — 2018-07-11 – p.5/38
6. 1) 2) 3) ⇒ ⇒ · / (dependable ) (Ethereum) — (1) — 2018-07-11 – p.6/38
7. /DLT ( ) Bitcoin ( ) Open Assets Protocol (OAP) ( ) Ethereum ( ) ( ) EOS (↓ ) (DLT) ( ) Hyperledger (Linux Foundation) Fabric (IBM/DAH), Sawtooth (Intel), Iroha ( ) Corda (R3), Tangle (IOTA), . . . , BBc-1 ( ) (Ethereum) — (1) — 2018-07-11 – p.7/38
8. /DLT ( ) ( ) ( vs. ) ( ) ( ) ( ) ⇒ ( : BBc-1) DLT : : (Ethereum) — (1) — 2018-07-11 – p.8/38
9. Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT & DECENTRALIZED APPLICATION PLATFORM” 15 (Ethereum) — (1) — 2018-07-11 – p.9/38
10. 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.10/38
11. geth GO https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum #installation-instructions geth 1.8.17-stable (10/24 ) $ geth version (Ethereum) — (1) — 2018-07-11 – p.11/38
12. Solidity http://solidity.readthedocs.io/en/latest/installing-solidity.html solc 0.4.25 (10/24 ) $ solc --version (Ethereum) — (1) — 2018-07-11 – p.12/38
13. 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.13/38
14. 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.14/38
15. 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.15/38
16. $ populus init contracts/Greeter.sol tests/test_greeter.py $ populus compile $ py.test (Ethereum) — (1) — 2018-07-11 – p.16/38
17. (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 Solidity 0.4.22 test_one_time_escrow.py (populus ) (Ethereum) — (1) — 2018-07-11 – p.17/38
18. (2) $ geth init genesis.json $ geth account new 16 (Ethereum) — (1) — 2018-07-11 – p.18/38
19. “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.19/38
20. DAG (Directed Acyclic Graph) Ether (Ethereum) — (1) — 2018-07-11 – p.20/38
21. 3. (Ethereum) — (1) — 2018-07-11 – p.21/38
22. (Ethereum) — (1) — 2018-07-11 – p.22/38
23. . . . (Ethereum) — (1) — 2018-07-11 – p.23/38
24. vs. (Ethereum) — (1) — 2018-07-11 – p.24/38
25. = run (Ethereum) — (1) — 2018-07-11 – p.25/38
26. Ether Ethereum EOA : Externally-Owned Account Ether EVM EVM (Ethereum) — (1) — 2018-07-11 – p.26/38
27. EVM : Ethereum Virtual Machine Gas (Ethereum) — (1) — 2018-07-11 – p.27/38
28. EVM : : Solidity — JavaScript LLL — Lisp (Ethereum) — (1) — 2018-07-11 – p.28/38
29. 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.29/38
30. (Ethereum) — (1) — 2018-07-11 – p.30/38
31. 4. (Ethereum) — (1) — 2018-07-11 – p.31/38
32. ADEPT ADEPT : IBM IoT (Ethereum) — (1) — 2018-07-11 – p.32/38
33. (Ethereum) — (1) — 2018-07-11 – p.33/38
34. ⇒ (Ethereum) — (1) — 2018-07-11 – p.34/38
35. The DAO ( ) The DAO Split ( ) 360 ETH (50∼60 ) (2016/6/17) ( ) ( ; ) (2016/7/20 ) (Ethereum) — (1) — 2018-07-11 – p.35/38
36. 5. (Ethereum) — (1) — 2018-07-11 – p.36/38
37. Greeter.sol “deploy.py” __main__ Greeter 0x & $ python deploy.py (Ethereum) — (1) — 2018-07-11 – p.37/38
38. : ERC20 : : (Ethereum) — (1) — 2018-07-11 – p.38/38