他の代表的なエンタープライズブロックチェーン基盤と比較したときのHyperledger Fabricの強みと課題、そしてユースケースの向き不向きについてお話します。また、しばしば難しいと言われるFabricをこれから入門する方ができるだけわかりやすく学んでいく、あるいはそうした方に教えていくためのポイントについてもご紹介します。 講演者 : 日本オラクル株式会社 クラウドプラットフォームソリューション部 中村 岳 氏 2020年6月11日オンライン開催 Hyperleger Tokyo Meetup にて講演

1. Hyperledger Meetup Tokyo
Hyperledger Fabric
日本オラクル株式会社
クラウド事業戦略統括
Gaku.Nakamura@oracle.com

2. Safe harbor statement
Oracle Java Oracle Corporation
2 Copyright © 2020, Oracle and/or its affiliates

3. @gakumura
@gakumura
… Hyperledger Fabric
@
SIer
OS AIX
D
3 Copyright © 2020, Oracle and/or its affiliates

4. Oracle Blockchain Platform Cloud Service
Hyperledger Fabricをベースにエンタープライズ利用向けPaaSとして提供
•
•
•
•
•
•
•
4 Copyright © 2020 Oracle and/or its affiliates
東京DCからも
サービス提供中

5. …
•
Hyperledger Fabric
• Fabric
5 Copyright © 2020, Oracle and/or its affiliates

6. …
•
Hyperledger Fabric
• Fabric
6 Copyright © 2020, Oracle and/or its affiliates

7. Hyperledger Fabric
• エンタープライズ用途のパーミッションドブロックチェーン
• 金融からサプライチェーンまで汎用的なユースケースをサポート
• 機密性/プライバシーを確保したデータ共有機能
• スケーラブル、プラガブルな設計
• エンタープライズ領域での本番利用の実績多数
7 Copyright © 2020, Oracle and/or its affiliates

8. エンタープライズ領域で（おそらく）No.1の利用実績
2019 Prod.
• Hyperledger Fabric
• Corda
• MultiChain
…
• Quorum
8 Copyright © 2020, Oracle and/or its affiliates
From: 2nd Global Enterprise Blockchain Study by Cambridge Univ.
https://www.jbs.cam.ac.uk/fileadmin/user_upload/research/centres/alternative-finance/downloads/2019-ccaf-second-global-enterprise-blockchain-report.pdf

9. From: Enterprise Blockchain Protocols Evolution Index
by Chainstack
https://chainstack.com/wp-
content/uploads/2020/01/Enterprise-Blockchain-Protocols-
Evolution-Index-2020.pdf
9 Copyright © 2020, Oracle and/or its affiliates

10. a.k.a. 3
…
•
•
•
Fabric
10 Copyright © 2020, Oracle and/or its affiliates
Quorum
Hyperledger
Fabric Corda

11. Quorum
• Quorum Node Public State Private State
• Ethereum Privacy Manager Tessera/Constellation
… Private Transaction
11 Copyright © 2020, Oracle and/or its affiliates
Quorum
Node
Privacy
Mgr
L
Quorum
Node
Privacy
Mgr
L

12. Corda
• Node
•
Identity Manager Notary
Network Map Service Root CA Trust Root
…
12 Copyright © 2020, Oracle and/or its affiliates
Node
L
Network
Map
Notary
Identity
Mgr
Trust
Root
Node
L

13. Org X Org Y
Hyperledger Fabric
• Peer
Orderer CA Certificate Authority
• Organization
Organization
13 Copyright © 2020, Oracle and/or its affiliates
Peer
L Ord
erer
Ord
erer
CA
Peer
L
CA
Peer
L
Peer
L

14. 1
• DLT
• Quorum Fabric Corda
14 Copyright © 2020, Oracle and/or its affiliates
A B
DC
A B
DC

15. Quorum Private Transaction
• Private Transaction
• Public State
Private State
• Private Transaction Private State
15 Copyright © 2020, Oracle and/or its affiliates
App 1
Tx1; Private for A, B
Node
A
Node
B
Node
C
Public PrivateTx2; Public
2 2
12
Public Private
12
Public Private
2
1
2

16. Hyperledger Fabric Channel
• Fabric Channel
• Channel Organization
• Channel Channel
• Channel
16 Copyright © 2020, Oracle and/or its affiliates
OrgA Peer OrgB Peer OrgC Peer
CH1 L1
L2
L1 L1
L2
L3 L3
CH2
CH3
Org
A
Org
B
Org
C

17. Hyperledger Fabric Private Data
• Channel
Private Data
• Private Data
• Organization …Private Data Collection
• Private Data Purge
17 Copyright © 2020, Oracle and/or its affiliates
OrgA Peer OrgB Peer OrgC Peer
Channel 1
L1
PD1
L1 L1
Private Data
Collection 1
PD1

18. Corda
… Need to know
•
•
Input Tx
Validating Notary
18 Copyright © 2020, Oracle and/or its affiliates
From https://docs.corda.net/docs/corda-os/4.4/key-concepts-ledger.html

19. …
Quorum Corda
• Quorum Private Transaction State
• Private Tx
Private State
• Enterprise Ethereum Hyperledger Besu Private State
Fabric
• Corda Tx
•
•
• Validating Notary
•
19 Copyright © 2020, Oracle and/or its affiliates

20. Fabric
•
• Channel Private Data
•
• Endorsement Policy
• Tx
• Org n 1 1 Channel Private Data Collection
Channel Private Data Collection m m=n(n-1)/2
• n 10 m 45 n 50 m=1225 n 100 m=4950
• Channel Private Data Collection
•
20 Copyright © 2020, Oracle and/or its affiliates

21. State
“Asset” : {
“id”:”1234567”,
“color”:”red”,
“size”:12,
“price”:200,
“owner”:”Bob”
}
2
• State
•
Bob 50 2
Alice
• State
• State DB
21 Copyright © 2020, Oracle and/or its affiliates
“Asset” : {
“id”:”1234567”,
“color”:”red”,
“size”:12,
“price”:200,
“owner”:”Bob”
}
“Asset” : {
“id”:”1234567”,
“color”:”red”,
“size”:12,
“price”:200,
“owner”:”Bob”
}

22. • Quorum
• Key Value …
• RDB State Indexing
• State
• Corda
• State Vault RDB Asset OnLedger
CodApp
• RDB
• Corda OS H2DB Postgress
• Corda Enterprise SQL Server/Azure SQL Oracle DB
22 Copyright © 2020, Oracle and/or its affiliates

23. Fabric
Fabric
• State DB LevelDB CouchDB
• CouchDB JSON Value JSON
JSON
• Phantom Read
Phantom Read OK
• CouchDB
• RDB
…
•
• LevelDB iState
https://github.com/motoreq/istate
- Phantom Read NG
23 Copyright © 2020, Oracle and/or its affiliates

24. 3
•
•
•
•
• Tx State
24 Copyright © 2020, Oracle and/or its affiliates
BA
Fetch
BA
Fetch

25. •
•
•
•
25 Copyright © 2020, Oracle and/or its affiliates

26. Corda Quorum
• Corda RDB
•
• HA RDB
• RDB
• Quorum Private Tx
• Private Tx Private State Corda
• Public State
26 Copyright © 2020, Oracle and/or its affiliates

27. Fabric
DLT
• Peer Channel && Private Data Collection
• Org OK Peer Channel&&
Chaincode Endorsement
• DLT
• HW Peer State DB Org Org Peer
Private Data fetch
Fabric
27 Copyright © 2020, Oracle and/or its affiliates

28. 4
•
•
• Fabric Endorsement Policy
• Peer Channel Chaincode
• Endorsement→Validation TAT Key
•
•
Key
28 Copyright © 2020, Oracle and/or its affiliates

29. Hyperledger Fabric
• Fabric
•
• PET Privacy Enhancement Technology
• 2.X
• Blockchain Verifier
• Interoperability
• Hyperledger Cactus
• FabToken
•
•
29 Copyright © 2020, Oracle and/or its affiliates

30. …
•
Hyperledger Fabric
• Fabric
30 Copyright © 2020, Oracle and/or its affiliates

31. …
31 Copyright © 2020, Oracle and/or its affiliates

32. Copyright © 2020, Oracle and/or its affiliates32
1
3
2

33. • Quorum
• Ethereum
• Solidity
• Ethereum
• Corda
•
• CordApp State Contract Flow
-
• Fabric
•
- Chaincode
•
•
33 Copyright © 2020, Oracle and/or its affiliates

34. Hyperledger Fabric
•
Fabric
• BaaS Fabric
Docker
• Fabric
•
•
• BaaS
34 Copyright © 2020, Oracle and/or its affiliates

35. • Peer Orderer CA Chaincode
• Fabric
• Organization Organization
Channel
• Channel
• Channel Organization Channel Peer Channel Chaincode
• Chaincode
•
• Endorsement Ordering Validation
• Endorsement Policy
• Private Data
35 Copyright © 2020, Oracle and/or its affiliates

36. • Marble Chaincode
• BaaS
• HLF
- HLF Go Java Node.js Version
• Node.js Chaincode
Go
• Chaincode
• Organization Peer Channel
• Chaincode
•
• Channel
•
VM
36 Copyright © 2020, Oracle and/or its affiliates

37. • … HLFv2.x
• IBM Developer JP Hyperledger Fabric 1 6
https://developer.ibm.com/jp/tutorials/cl-hyperledger-fabric-basic-1/
• OCHaCafe #4 Hyperledger Fabric
https://speakerdeck.com/gakumura/ochacafe-number-4-hyperledger-fabric
•
• https://readthedocs.org/projects/hyperledger-fabric/
• Node.js Chaincode API https://hyperledger.github.io/fabric-chaincode-node/
…Java Go Chaincode API
37 Copyright © 2020, Oracle and/or its affiliates

38. Thank you
38 Copyright © 2020, Oracle and/or its affiliates