2022 08 22 08 28

8/23

• IEEE Blockchain Technical Briefs - March 2022

  • DAO 讓 work to earn > invest to earn/play to earn
  • 民主投資
  • Play it Forward （Movecoin、Blockbuster、Daywalker movie fund)

• Non-Fungible Token (NFT): Overview, Evaluation, Opportunities and Challenges

• NFT for Eternity

• Incorporating Registration, Reputation, and Incentivization Into the NFT Ecosystem

  • 完整的設計

• An Initial Framework for NFT Auction Mechanism Design: Impossibility Results and Solutions

  • 哥倫比亞大學blockchain報告

• Utilizing Non-fungible Tokens for an Event Ticketing System

• https://www.blockcerts.org/

  • https://www.blockcerts.org/guide/quick-start.html
  • https://github.com/blockchain-certificates/cert-tools
    • 有錯誤，發PR，看起來沒人理

8/24

• https://github.com/BlockTechCert/BTCert
• blockcert example: https://raw.githubusercontent.com/blockchain-certificates/cert-issuer/master/examples/data-testnet/unsigned_certificates/verifiable-credential.json
• https://github.com/blockchain-certificates/cert-issuer#quick-start-using-docker > docker commit
  • err:Error: Config setting for -rpcport only applied on regtest network when in [regtest] section.
  • https://medium.com/@bitstein/setting-up-a-bitcoin-lightning-network-test-environment-ab967167594a https://ithelp.ithome.com.tw/articles/10216368 https://livebook.manning.com/book/grokking-bitcoin/copyright-2018-manning-publications/v-6/

8/26

• npx hardhat node
• 設定conf.ini

issuing_address = 0xFfe3602dd0e2B34c90bA8ea2C8a241C8FD7746c3
verification_method=did:ion:EiA_Z6LQILbB2zj_eVrqfQ2xDm4HNqeJUw5Kj2Z7bFOOeQ
chain = ethereum_ropsten

usb_name=/etc/cert-issuer/
key_file= /home/alanhc/workspace/cert-issuer/pk.key

# put your unsigned certificates here for signing. Default is <project-base>/data/unsigned_certificates
unsigned_certificates_dir= /home/alanhc/workspace/cert-issuer/data/unsigned_certificates
# final blockchain certificates output. Default is <project-base>/data/unsigned_certificates
blockchain_certificates_dir= /home/alanhc/workspace/cert-issuer/data/unsigned_certificates
# where to store intermediate files, for debugging and checkpointing. Default is <project-base>/data/work
work_dir=/home/alanhc/workspace/cert-issuer/data/work

no_safe_mode

• run成功:python -m cert_issuer -c conf.ini –ropsten_rpc_url localhost:9545

1. https://github.com/alanhc/cert-issuer
2. git checkout v2
3. python setup.py experimental –blockchain=ethereum
4. cp examples/data-testnet/unsigned_certificates/3bc1a96a-3501-46ed-8f75-49612bbac257.json data/unsigned_certificates/
5. cp conf_ethtest.ini conf.ini 更改裡面檔案
6. mkdir data/context
7. curl https://w3id.org/security/suites/ed25519-2020/v1 -L > data/context/ed25519.v1.json
8. https://rpc.info/ 查可用的rpc network
9. python -m cert_issuer -c conf.ini –ropsten_rpc_url https://ropsten.infura.io/v3/9aa3d95b3bc440fa88ea12eaa4456161

• 這篇很多人轉 190 cite Blockchain and the Future of Digital Learning Credential Assessment and Management
• Decentralized Identity: Passport to Web3