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イーサリアム (Ethereum) 入門 / Introduction to Ethereum
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Kenji Saito
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October 25, 2017
Technology
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イーサリアム (Ethereum) 入門 / Introduction to Ethereum
2017年10月25日(水)、ブロックチェーンアカデミー「スマートコントラクトプログラミング講座(2)」にて使用のスライドです。
Kenji Saito
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October 25, 2017
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Transcript
(Ethereum) (2) CSO / SFC
[email protected]
(Ethereum) – (2) –
2017-10-25 – p.1/33
1. 2. 3. 4. 5. (Ethereum) – (2) – 2017-10-25
– p.2/33
1. 2. 3. 4. 5. (Ethereum) – (2) – 2017-10-25
– p.3/33
1. (Ethereum) – (2) – 2017-10-25 – p.4/33
Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT
& DECENTRALIZED APPLICATION PLATFORM” 15 (Ethereum) – (2) – 2017-10-25 – p.5/33
2. macOS (High Sierra 10.13) + Homebrew Linux (Ubuntu 16.04)
Windows 10 + Bash on Ubuntu on Windows geth, solidity populus (Ethereum) – (2) – 2017-10-25 – p.6/33
geth GO https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum #installation-instructions geth 1.7.2-stable (10/24 ) $ geth
-help (Ethereum) – (2) – 2017-10-25 – p.7/33
Solidity http://solidity.readthedocs.io/en/latest/installing-solidity.html solc 0.4.18 (10/24 ) $ solc --version (Ethereum)
– (2) – 2017-10-25 – p.8/33
Python pip macOS http://qiita.com/oct_itmt/items/2d066801a7464a676994 (pyenv ) Ubuntu 16.04 (Ethereum) –
(2) – 2017-10-25 – p.9/33
Populus Python http://populus.readthedocs.io/en/latest/quickstart.html Open SSL Populus $ pip install populus
version 1.10.1 (10/24 ) requirement rlp==0.5.1 ( pip ) $ pip install -U rlp==0.5.1 (Ethereum) – (2) – 2017-10-25 – p.10/33
$ populus init contracts/Greeter.sol tests/test_greeter.py $ populus compile $ py.test
. (Ethereum) – (2) – 2017-10-25 – p.11/33
(1) http://beyond-blockchain.org/public/BcH-smart-contract-programming.zip Python (init.py, run.py, deploy.py) populus.json genesis.json $ python
init.py $ geth init genesis.json (Ethereum) – (2) – 2017-10-25 – p.12/33
(2) $ geth account new 16 (Ethereum) – (2) –
2017-10-25 – p.13/33
“run.py” ‘--etherbase’ 0x $ python run.py $ tail -f geth.log
process id kill (Ethereum) – (2) – 2017-10-25 – p.14/33
DAG (Directed Acyclic Graph) Ether (Ethereum) – (2) – 2017-10-25
– p.15/33
3. (Ethereum) – (2) – 2017-10-25 – p.16/33
(Ethereum) – (2) – 2017-10-25 – p.17/33
. . . (Ethereum) – (2) – 2017-10-25 – p.18/33
vs. (Ethereum) – (2) – 2017-10-25 – p.19/33
= run (Ethereum) – (2) – 2017-10-25 – p.20/33
Ether Ethereum EOA : Externally-Owned Account Ether EVM EVM (Ethereum)
– (2) – 2017-10-25 – p.21/33
EVM : Ethereum Virtual Machine Gas (Ethereum) – (2) –
2017-10-25 – p.22/33
EVM : : Solidity — JavaScript LLL — Lisp (Ethereum)
– (2) – 2017-10-25 – p.23/33
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; } } (Ethereum) – (2) – 2017-10-25 – p.24/33
(Ethereum) – (2) – 2017-10-25 – p.25/33
4. (Ethereum) – (2) – 2017-10-25 – p.26/33
ADEPT ADEPT : IBM IoT (Ethereum) – (2) – 2017-10-25
– p.27/33
(Ethereum) – (2) – 2017-10-25 – p.28/33
⇒ (Ethereum) – (2) – 2017-10-25 – p.29/33
The DAO ( ) The DAO Split ( ) 360
ETH (50∼60 ) (2016/6/17) ( ) ( ; ) (2016/7/20 ) (Ethereum) – (2) – 2017-10-25 – p.30/33
5. (Ethereum) – (2) – 2017-10-25 – p.31/33
Greeter.sol “deploy.py” __main__ Greeter 0x & $ python deploy.py (Ethereum)
– (2) – 2017-10-25 – p.32/33
I (Ethereum) – (2) – 2017-10-25 – p.33/33