Getting Started With the Hedera Consensus Service скачать в хорошем качестве

Getting Started With the Hedera Consensus Service

Learn how to use the Hedera Consensus Service to build applications using JavaScript or other programming languages. Further, you'll learn how to use the mirror node to retrieve and filter messages. 00:00 Introduction to Hedera Consensus Service 01:49 Code setup 02:30 Create a topic ID and retrieve ID 03:50 5s timeout (explanation) 04:17 Subscribe to topic 04:31 Add subscribe callback 05:51 Submit message to topic ID 06:38 Get receipt for message 07:22 Test code in terminal 08:10 Retrieve messages from Mirror Node 09:20 Example query (all messages) 10:15 Query filters for messages 11:01 OpenAPI specification (more filters) 12:46 Subscribe to topic (from timestamp) 14:34 Summary 15:08 Try the code! Developer resources: Quickstart: https://hedera.com/get-started Create a Testnet Account: https://portal.hedera.com/register Repo: https://github.com/hashgraph Docs: https://docs.hedera.com/guides​ Whitepapers: https://hedera.com/papers​ FAQ: https://help.hedera.com Chat: https://hedera.com/discord​ Join our community to learn more: Twitter:   / hedera​   Telegram: https://t.me/hederahashgraph​ Discord: https://hedera.com/discord​ LinkedIn:   / hashgraph   Facebook:   / hashgraph​   Reddit:   / hedera   YouTube:    / hederahashgraph   #Hedera #Hashgraph​ #HBAR