Blockchain, NFT and Smart Contracts for My (Java) Application
Talkat JCON Europe 2023 · on Thursday, 2023-06-22· at 16:00· Cinema 6, Im Mediapark 1, 50670 Köln, Germany·
summary
Shows Java-ready, runnable examples: Solidity compiled with solc (via Docker or Maven plugin) into an ABI, invoked from Java using the Hedera SDK and deployed to Hedera testnet (free HBAR faucet). Claims Hedera runs an EVM-compatible runtime with multi-million daily transactions and much lower energy use after architectural changes, contrasts with Ethereum’s DAO (≈3.6M ETH) and Axie (≈$620M) hacks, and demonstrates a working JavaCoin Spring Boot workshop using OpenZeppelin token contracts.
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chapters (9)
- 0:00Introduction and speaker background
- 1:46Bitcoin and Satoshi Nakamoto
- 9:27Ethereum and smart contracts
- 15:31Ethereum hacks and vulnerabilities
- 20:34Sustainability of blockchain networks
- 25:09Hedera Hashgraph introduction
- 33:46Smart contracts explained
- 44:29Tokens and NFTs
- 49:27Q&A session
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