スマートコントラクトプログラミング(2) イーサリアム(Ethereum)入門 / Introduction to Ethereum, Smart Contract Programming 2

ブロックチェーンハブ主催で開催しているブロックチェーン連続講義シリーズ「スマートコントラクトプログラミング」の第2回「イーサリアム(Ethereum)入門」のスライドです。2016年10月14日(金) に使用しました。

Transcript

1. (Ethereum) (2) SFC / CSO ks91@sfc.wide.ad.jp (Ethereum) — (2) – 2016-10-14 – p.1/43
2. 1. 2. 3. 4. 5. (Ethereum) — (2) – 2016-10-14 – p.2/43
3. 1. 2. 3. 4. 5. (Ethereum) — (2) – 2016-10-14 – p.3/43
4. 1. (Ethereum) — (2) – 2016-10-14 – p.4/43
5. Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT & DECENTRALIZED APPLICATION PLATFORM” 12 (Ethereum) — (2) – 2016-10-14 – p.5/43
6. 2. Mac OS X (Yosemite 10.10.5) + Homebrew Linux (Ubuntu 14.04 Desktop) Windows 10 geth (CLI) Ethereum-Wallet (GUI) Ethereum | NTT (Ethereum) — (2) – 2016-10-14 – p.6/43
7. URL http://goo.gl/Xjluar (Ethereum) — (2) – 2016-10-14 – p.7/43
8. geth GO https://github.com/ethereum/go-ethereum/wiki/Building-Ethereum #installation-instructions geth 1.4.17-stable $ geth -help (Ethereum) — (2) – 2016-10-14 – p.8/43
9. Ethereum-Wallet GUI https://github.com/ethereum/mist/releases Downloads ZIP geth ( ) (Ethereum) — (2) – 2016-10-14 – p.9/43
10. genesis.json { "nonce": "0x00006d6f7264656e", "difficulty": "0x200", "mixhash": "0x0000000000000000000000000000000000000064757 2616c65787365646c6578", "coinbase": "0x0000000000000000000000000000000000000000", "timestamp": "0x00", "parentHash": "0x0000000000000000000000000000000000000000 000000000000000000000000", "extraData": "0x", "gasLimit": "0x2FEFD8", "alloc": { } } “genesis.json” Windows geth.exe (Ethereum) — (2) – 2016-10-14 – p.10/43
11. genesis.json cd Windows geth.exe $ geth init genesis.json “successfully wrote genesis block and/or chain rule set” (Ethereum) — (2) – 2016-10-14 – p.11/43
12. $ geth --networkid 12345678 --port 50303 --maxpeers 0 --nodiscover console 2>> node.log > > exit $ tail -f node.log (Mac OS X, Linux) > Get-Content node.log -Wait -Tail 10 (Windows PowerShell) (Ethereum) — (2) – 2016-10-14 – p.12/43
13. Ethereum-Wallet “LAUNCH APPLICATION” (Ethereum) — (2) – 2016-10-14 – p.13/43
14. ADD ACCOUNT 2 (Ethereum) — (2) – 2016-10-14 – p.14/43
15. (ETHERBASE) Ether (Ethereum) — (2) – 2016-10-14 – p.15/43
16. geth > miner.start(2) true ‘2’ ( CPU ) > miner.stop() (Ethereum) — (2) – 2016-10-14 – p.16/43
17. node.log DAG (Directed Acyclic Graph) Ether (Ethereum) — (2) – 2016-10-14 – p.17/43
18. 3. (Ethereum) — (2) – 2016-10-14 – p.18/43
19. (Ethereum) — (2) – 2016-10-14 – p.19/43
20. . . . (Ethereum) — (2) – 2016-10-14 – p.20/43
21. vs. (Ethereum) — (2) – 2016-10-14 – p.21/43
22. = run (Ethereum) — (2) – 2016-10-14 – p.22/43
23. Ether Ethereum EOA : Externally-Owned Account Ether EVM EVM (Ethereum) — (2) – 2016-10-14 – p.23/43
24. EVM : Ethereum Virtual Machine Gas (Ethereum) — (2) – 2016-10-14 – p.24/43
25. EVM : : Solidity — JavaScript LLL — Lisp (Ethereum) — (2) – 2016-10-14 – p.25/43
26. Solidity contract metaCoin { mapping (address => uint) balances; function metaCoin() { balances[msg.sender] = 10000; } function sendCoin(address receiver, uint amount) returns(bool sufficient) { if (balances[msg.sender] < amount) return false; balances[msg.sender] -= amount; balances[receiver] += amount; return true; } } by hshimo (Ethereum) — (2) – 2016-10-14 – p.26/43
27. (Ethereum) — (2) – 2016-10-14 – p.27/43
28. 4. (Ethereum) — (2) – 2016-10-14 – p.28/43
29. ADEPT ADEPT : IBM IoT (Ethereum) — (2) – 2016-10-14 – p.29/43
30. (Ethereum) — (2) – 2016-10-14 – p.30/43
31. ⇒ (Ethereum) — (2) – 2016-10-14 – p.31/43
32. The DAO ( ) The DAO Split ( ) 360 ETH (50∼60 ) (6/17) ( ) ( ; ) (7/20 ) (Ethereum) — (2) – 2016-10-14 – p.32/43
33. 5. (Ethereum) — (2) – 2016-10-14 – p.33/43
34. ADD ACCOUNT 2 (Ethereum) — (2) – 2016-10-14 – p.34/43
35. (1) CONTRACTS DEPLOY NEW CONTRACT (Ethereum) — (2) – 2016-10-14 – p.35/43
36. (2) & https://ethereum.github.io/browser-solidity/?#gist=21935dc37c5bfbe92e5a &version=soljson-v0.4.1-2016-09-08-8a057e3.js (Ethereum) — (2) – 2016-10-14 – p.36/43
37. (3) Pick a contract My Token _supply : 0 _name : BcH Coin _symbol : BcH _decimals : 0 (Ethereum) — (2) – 2016-10-14 – p.37/43
38. DEPLOY TX ( ) 12 (Ethereum) — (2) – 2016-10-14 – p.38/43
39. (1) WALLET Ether 1,000,000 BcH WALLET 0 Ether (Ethereum) — (2) – 2016-10-14 – p.39/43
40. (2) Transfer Ether & Tokens 1 BcH BcH Coin AMOUNT 1 (Ethereum) — (2) – 2016-10-14 – p.40/43
41. (3) SEND TX (Ethereum) — (2) – 2016-10-14 – p.41/43
42. WALLET BcH Coin 1 BcH (Ethereum) — (2) – 2016-10-14 – p.42/43
43. I (Ethereum) — (2) – 2016-10-14 – p.43/43