Hyperledger Korea UserGroup Meetup

2019년 06월 27일

주제

• Hyperledger FabToken Overview 및 실습

자료

• 발표 자료 - https://www.slideshare.net/secret/mOK4nVBWIFKBOR
• 실습 자료 - https://github.com/hlkug/meetup/blob/master/201906/핸즈온%20랩.md

Hyperledger Fabric v2.0 Alpha - FabToken Overview, Hands-On Lab

Enterprise Blockchain - Token 부분

• R3 Corda – Tokens SDK
• JP Morgan Quorum – JPM Coin
  • https://www.jpmorgan.com/global/news/digital-coin-payments
• Hyperledger Fabric v2 – FabToken
  • Token Management Enablement in Hyperledger Fabric
    • http://bit.ly/2KvVKb4
  • Token (base support) - Support Issue, Transfer, and Redeem Token Operations
    • https://jira.hyperledger.org/browse/FAB-11144
  • Using FabToken
    • https://hyperledger-fabric.readthedocs.io/en/latest/token/FabToken.html

FabToken

• Hyperledger Fabric v2.0 -> https://github.com/hyperledger/fabric/tree/master/token
• Token Management System
• Unspent Transaction Output (UTXO) 모델
• 합의, 검증을 위해 Orderer, Peer 사용
• 토큰 생성, 관리를 위해 체인코드를 사용하지 않음.(Endorsement Policy X)
• s송/수신자 식별 – MSP
• Token Lifecycle: Issue, Transfer, Redeem, List

UTXO

• 패브릭에서는 상태(State)는 Key-Value 형태로 저장
  • Key : Namespace + TokenPrefix + Owner + TransactionId + Index Value: Quantity
• Unspent Transaction(Output)은 Ledger(State DB)에 저장되고 Spent Transaction(Input)은 Ledger(State DB)에서 삭제됨

느낀점

fabtoken hands-on 통해 실제 토큰 issue-transfer-redeem 절차 눈으로 확인해서 좋음. 사진에 또 나왔네.