BBc-1 と Ethereum 入門 / Introduction to BBc-1 and Ethereum

2020年5月13日(水)、ブロックチェーンハブ主催のブロックチェーンアカデミー「実践！スマートコントラクトプログラミング 」第1回にて使用したスライドです。

Transcript

1. 1 BBc-1 Ethereum CSO / ks91@blockchainhub.co.jp — 1 BBc-1 Ethereum — 2020-05-13 – p.1/34
2. https://speakerdeck.com/ks91 — 1 BBc-1 Ethereum — 2020-05-13 – p.2/34
3. ( ) SFC / ( ) CSO (Chief Science Officer) 1993 ( ) 2006 ( ) SFC 19 P2P (Peer-to-Peer) ( 9 ) 2011 2018 2019 2019 2020 “STAY HOME, ENJOY LIFE” (in Zoom) → ( ) — 1 BBc-1 Ethereum — 2020-05-13 – p.3/34
4. BBc-1 (Beyond Blockchain One) Ethereum — 1 BBc-1 Ethereum — 2020-05-13 – p.4/34
5. 1. Ethereum 2. Ethereum 3. Ethereum 4. 5. BBc-1 — 1 BBc-1 Ethereum — 2020-05-13 – p.5/34
6. 1. Ethereum — 1 BBc-1 Ethereum — 2020-05-13 – p.6/34
7. 1) 2) (= ) 3) ⇒ (= ) ⇒ · / (dependable ) — 1 BBc-1 Ethereum — 2020-05-13 – p.7/34
8. /DLT ( ) Bitcoin ( ) Open Assets Protocol (OAP) ( ) Ethereum (Dapps ( ) ) ( ) EOS (↓ ) (DLT) ( ) Hyperledger (Linux Foundation) Fabric (IBM/DAH), Sawtooth (Intel), Iroha ( ) Corda (R3), . . . , BBc-1 ( ) — 1 BBc-1 Ethereum — 2020-05-13 – p.8/34
9. Ethereum Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT & DECENTRALIZED APPLICATION PLATFORM” 15 Dapps ( / / ) — 1 BBc-1 Ethereum — 2020-05-13 – p.9/34
10. 2. Ethereum macOS (Catalina 10.15.4) + Homebrew Linux (Ubuntu 18.04) Windows 10 + Windows Subsystem for Linux (Ubuntu 18.04 ) Ethereum solidity brownie — 1 BBc-1 Ethereum — 2020-05-13 – p.10/34
11. Solidity Ethereum http://solidity.readthedocs.io/en/latest/installing-solidity.html Linux (on Windows) “sudo apt”, macOS “brew” solc 0.6.7 (5/13 ) $ solc --version brownie py-solc-x solc (dependencies) ( solc py-solc-x ) — 1 BBc-1 Ethereum — 2020-05-13 – p.11/34
12. Python3 macOS $ brew install python3 Linux $ sudo add-apt-repository ppa:deadsnakes/ppa $ sudo apt update $ sudo apt install python3.7 python3.7-dev python3.7-venv python3.7-tk 16.10 python3(.7) apt python3.8 — 1 BBc-1 Ethereum — 2020-05-13 – p.12/34
13. macOS : . . . macOS wget brew dyld: Library not loaded: /usr/local/opt/gettext/lib/libintl.8.dylib $ brew uninstall --force gettext $ brew install gettext — 1 BBc-1 Ethereum — 2020-05-13 – p.13/34
14. Python (venv) macOS ‘python3.7’ ‘python3’ $ python3.7 -m venv bbc1env $ source bbc1env/bin/activate (bbc1env) $ pip install -U pip (bbc1env) $ pip install wheel bbc1env ( BBc-1 ) ( ) (bbc1env) $ deactivate — 1 BBc-1 Ethereum — 2020-05-13 – p.14/34
15. Ganache CLI Ethereum RPC npm ( ) macOS https://qiita.com/kyosuke5_20/items/c5f68fc9d89b84c0df09 Linux https://qiita.com/seibe/items/36cef7df85fe2cefa3ea npm Ganache CLI $ sudo npm install -g ganache-cli — 1 BBc-1 Ethereum — 2020-05-13 – p.15/34
16. Brownie Python Ethereum https://eth-brownie.readthedocs.io Brownie $ pip install eth-brownie version 1.8.4 (5/13 ) — 1 BBc-1 Ethereum — 2020-05-13 – p.16/34
17. $ brownie init ( ERC-20 ) $ brownie bake token $ cd token ( ) $ brownie compile ( ) $ pytest tests — 1 BBc-1 Ethereum — 2020-05-13 – p.17/34
18. Brownie $ brownie console Python >>> len(accounts) 10 >>> accounts[0].balance() 100000000000000000000 >>> quit() — 1 BBc-1 Ethereum — 2020-05-13 – p.18/34
19. 3. Ethereum — 1 BBc-1 Ethereum — 2020-05-13 – p.19/34
20. — 1 BBc-1 Ethereum — 2020-05-13 – p.20/34
21. . . . — 1 BBc-1 Ethereum — 2020-05-13 – p.21/34
22. vs. — 1 BBc-1 Ethereum — 2020-05-13 – p.22/34
23. = run — 1 BBc-1 Ethereum — 2020-05-13 – p.23/34
24. Ether Ethereum EOA : Externally-Owned Account Ether EVM EVM — 1 BBc-1 Ethereum — 2020-05-13 – p.24/34
25. EVM : Ethereum Virtual Machine Gas — 1 BBc-1 Ethereum — 2020-05-13 – p.25/34
26. EVM : : Solidity — JavaScript LLL — Lisp Vyper — Python — 1 BBc-1 Ethereum — 2020-05-13 – p.26/34
27. Solidity ( ) pragma solidityˆ0.5.0; contract IndivisibleAsset { /* */ string public _name; string public _symbol; uint256 public _quantity; address public _owner; constructor(string memory name, string memory symbol, uint256 quantity) public { _name = name; _symbol = symbol; _quantity = quantity; _owner = msg.sender; } function transfer(address to) public returns (bool) { require (_owner == msg.sender); _owner = to; return true; } } — 1 BBc-1 Ethereum — 2020-05-13 – p.27/34
28. Ethereum — 1 BBc-1 Ethereum — 2020-05-13 – p.28/34
29. 4. Ethereum ropsten — 1 BBc-1 Ethereum — 2020-05-13 – p.29/34
30. infura.io Brownie https://infura.io SIGN UP PROJECT ID infura Ethereum API infura . . . infura.io PROJECT ID Brownie “brownie-config.yaml” . . . YAML WEB3_INFURA_PROJECT_ID PROJECT ID (∼/.bash_profile ) $ export WEB3_INFURA_PROJECT_ID= PROJECT ID — 1 BBc-1 Ethereum — 2020-05-13 – p.30/34
31. ropsten ETH brownie console ropsten >>> network.disconnect() >>> network.connect(’ropsten’) >>> len(accounts) 0 >>> accounts.add() <LocalAccount object ’ 16 ’> >>> accounts[0].private_key 16 >>> quit() Ropsten Ethereum Faucet 1.0ETH https://faucet.ropsten.be ( ) https://metamask.io/ — 1 BBc-1 Ethereum — 2020-05-13 – p.31/34
32. ropsten ETH brownie console ropsten ETH >>> network.disconnect() >>> network.connect(’ropsten’) >>> len(accounts) 0 >>> accounts.add( 16 ) <LocalAccount object ’ 16 ’> >>> accounts[0].balace() ETH >>> quit() — 1 BBc-1 Ethereum — 2020-05-13 – p.32/34
33. 5. BBc-1 https://speakerdeck.com/beyondblockchain/bbc-1-hands-on-installation-and-file-content-proof — 1 BBc-1 Ethereum — 2020-05-13 – p.33/34
34. 2 BBc-1 Ethereum I : — 1 BBc-1 Ethereum — 2020-05-13 – p.34/34