Getting started with Blockchain
summary
Live-codes a minimal custody service using Quarkus and web3j against a local Docker Ethereum node exposing JSON‑RPC 8545, with a custom genesis and rapid local mining (blocks ~every 5s). Implements withdrawals, deposits and balance tracking by building and signing raw transactions from stored private keys, computing nonce and fees (base fee + tip + max), broadcasting via sendRawTransaction, and scanning blocks to confirm receipts. Demo submits transactions, the node mines them and the service marks operations confirmed.
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chapters (13)
- 0:00Introduction and goals
- 2:46Speaker introduction
- 3:29What is blockchain
- 8:35Setting up a local Ethereum node
- 14:11Interacting with the blockchain
- 16:16Building the custody service
- 21:17Transaction fees and nonce
- 31:13Signing transactions securely
- 37:14Handling transaction states
- 41:53Scanning the blockchain for updates
- 46:33Live demo of the service
- 50:10Anchorage Digital platform overview
- 53:27Q&A session
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