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

2020年12月2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 — 2020-12-02 – p.1/36
2. https://speakerdeck.com/ks91 — 1 BBc-1 Ethereum — 2020-12-02 – p.2/36
3. ( ) SFC ( ) CSO (Chief Science Officer) 1993 ( ) 2006 ( ) SFC 20 P2P (Peer-to-Peer) ( 9 ) 2011 2018 2019 2019 2020 2020 → ( ) — 1 BBc-1 Ethereum — 2020-12-02 – p.3/36
4. BBc-1 (Beyond Blockchain One) Ethereum — 1 BBc-1 Ethereum — 2020-12-02 – p.4/36
5. 1. Ethereum 2. Ethereum 3. Ethereum 4. 5. BBc-1 — 1 BBc-1 Ethereum — 2020-12-02 – p.5/36
6. 1. Ethereum — 1 BBc-1 Ethereum — 2020-12-02 – p.6/36
7. (BP : Blockchain Property ) BP-1 : BP-2 : BP-3 : ( ) ( ) — 1 BBc-1 Ethereum — 2020-12-02 – p.7/36
8. 1) 2) (= ) 3) ⇒ (= ) ⇒ · / (dependable ) — 1 BBc-1 Ethereum — 2020-12-02 – p.8/36
9. /DLT ( ) Bitcoin ( ) Open Assets Protocol (OAP) ( ) Ethereum (2.0) (Dapps ( ) ) ( ) (DLT) ( ) Hyperledger (Linux Foundation) Fabric (IBM/DAH), Sawtooth (Intel), Iroha ( ), Indy, Besu Polkadot (Web3 Foundation) ( ; Ethereum 2.0 ) Corda (R3), . . . , BBc-1 ( ) — 1 BBc-1 Ethereum — 2020-12-02 – p.9/36
10. Ethereum Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT & DECENTRALIZED APPLICATION PLATFORM” 15 Dapps ( / / ) — 1 BBc-1 Ethereum — 2020-12-02 – p.10/36
11. 2. Ethereum macOS (Catalina 10.15.7) + Homebrew Linux (Ubuntu 18.04 and 20.04) (x86/AMD64 and ARM) Windows 10 + Windows Subsystem for Linux (Ubuntu ) Ethereum solidity brownie — 1 BBc-1 Ethereum — 2020-12-02 – p.11/36
12. Solidity Ethereum ( ) http://solidity.readthedocs.io/en/latest/installing-solidity.html Linux (on Windows) “sudo apt”, macOS “brew” Linux ARM git clone dependencies solc 0.7.5 (12/2 ) $ solc --version brownie py-solc-x solc (dependencies) ( solc py-solc-x ) — 1 BBc-1 Ethereum — 2020-12-02 – p.12/36
13. 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 — 2020-12-02 – p.13/36
14. Python3 macOS $ brew install python@3.8 python3 python 3.9 (12/2 ) 3.9 3.8 3.9 $ brew uninstall --ignore-dependencies python@3.9 $ brew install python@3.8 /usr/local/opt/python@3.8/bin/python3 Linux $ sudo apt update $ sudo apt install python3.8 python3.8-dev python3.8-venv python3.8-tk 16.10 python3(.8) apt (PPA ) python3 python3-dev python3-venv python3-tk — 1 BBc-1 Ethereum — 2020-12-02 – p.14/36
15. 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 — 2020-12-02 – p.15/36
16. Python (venv) macOS (Linux python3 ) ‘python3.8’ ‘python3’ $ python3.8 -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 — 2020-12-02 – p.16/36
17. Brownie Python Ethereum https://eth-brownie.readthedocs.io Brownie $ pip install eth-brownie version 1.12.1 (12/2 ) — 1 BBc-1 Ethereum — 2020-12-02 – p.17/36
18. $ brownie init ( ERC-20 ) $ brownie bake token $ cd token — 1 BBc-1 Ethereum — 2020-12-02 – p.18/36
19. contracts version 0.5.17 Solidity ‘0.6.0’ ‘0.5.0’ (macOS Linux (x86/AMD64) ) $ brownie compile Linux (ARM) (AMD64 ) $ python # >>> import solcx >>> solcx.compile_solc(’0.5.17’) # >>> quit() /tmp ∼/.solcx/solc-v0.5.17 ( ) $ pytest tests — 1 BBc-1 Ethereum — 2020-12-02 – p.19/36
20. Brownie $ brownie console Python >>> len(accounts) 10 >>> accounts[0].balance() 100000000000000000000 >>> quit() — 1 BBc-1 Ethereum — 2020-12-02 – p.20/36
21. 3. Ethereum — 1 BBc-1 Ethereum — 2020-12-02 – p.21/36
22. — 1 BBc-1 Ethereum — 2020-12-02 – p.22/36
23. . . . — 1 BBc-1 Ethereum — 2020-12-02 – p.23/36
24. vs. — 1 BBc-1 Ethereum — 2020-12-02 – p.24/36
25. = run — 1 BBc-1 Ethereum — 2020-12-02 – p.25/36
26. Ether Ethereum EOA : Externally-Owned Account ( ) Ether EVM EVM — 1 BBc-1 Ethereum — 2020-12-02 – p.26/36
27. EVM : Ethereum Virtual Machine (validator) ⇒ Gas — 1 BBc-1 Ethereum — 2020-12-02 – p.27/36
28. EVM : : ← : Solidity — JavaScript LLL — Lisp Vyper — Python Fe — Vyper Rust ← NEW! Solidity Vyper Python — 1 BBc-1 Ethereum — 2020-12-02 – p.28/36
29. 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 — 2020-12-02 – p.29/36
30. Ethereum — 1 BBc-1 Ethereum — 2020-12-02 – p.30/36
31. 4. Ethereum ropsten — 1 BBc-1 Ethereum — 2020-12-02 – p.31/36
32. infura.io Brownie https://infura.io SIGN UP PROJECT ID infura Ethereum API infura . . . infura.io PROJECT ID WEB3_INFURA_PROJECT_ID PROJECT ID (∼/.bash_profile ) $ export WEB3_INFURA_PROJECT_ID= PROJECT ID — 1 BBc-1 Ethereum — 2020-12-02 – p.32/36
33. 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 Testnet ETH Faucet 5.0ETH https://faucet.dimensions.network/ ( ) https://metamask.io/ — 1 BBc-1 Ethereum — 2020-12-02 – p.33/36
34. 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() ETH >>> accounts[0].transfer(accounts[1], "1 ether") — 1 BBc-1 Ethereum — 2020-12-02 – p.34/36
35. 5. BBc-1 https://speakerdeck.com/beyondblockchain/bbc-1-hands-on-installation-and-file-content-proof — 1 BBc-1 Ethereum — 2020-12-02 – p.35/36
36. 2 BBc-1 Ethereum I : — 1 BBc-1 Ethereum — 2020-12-02 – p.36/36