This is Michiel from Hashgraph back with highlights from the month of April
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Hi there,

This is Michiel from Hashgraph, bringing you the April developer highlights.

This month, Hedera has adopted Chainlink's cross-chain interoperability standard (CCIP), enhancing connectivity across blockchain ecosystems. Additionally, the latest technical community call introduced new feedback channels and provided insights into the HCS-10 architecture. For developers, a new tutorial guides you through advanced ERC-721 token management, covering access control, URI storage, pausing, and transferring tokens. Jay also demonstrates how to monetize your AI agents using revenue-generating topic IDs on Hedera.

Lastly, we're seeking valuable insights from our developer community through the 2025 Hedera EVM & Tooling Survey. Your feedback helps us continually improve our tools, documentation, and overall developer experience.

Let's dive into these exciting updates and more!

Announcements

    04.01.25

    📢 Participate in the 2025 Hedera EVM & Tooling Survey

      04.05.25

      Hedera Java SDK Upgrading to Java 21

        04.08.25

        Hedera Integrates Chainlink's Cross-Chain Protocol (CCIP)

          04.22.25

          Join Hedera's weekly developer Q&A sessions on Discord

            Featured Media

              Technical Community Call: AI Hackathon & New Discord Feedback Channels

                In the April 2025 Technical Community Call, the team introduced new Discord feedback channels, shared updates on the AI Agents Hackathon, and explored how HCS-10 enables agent-to-agent communication via the Hedera Consensus Service.

                Screenshot 2025-05-02 at 7.17.27 PM

                Pragmatic Blockchain Design Patterns – Integrating Blockchain into Business Processes

                  This blog explores practical blockchain strategies for enterprises, focusing on aligning solutions with business needs. It highlights four key patterns: timestamping for auditability, tokenizing real-world assets, enabling self-sovereign identity, and automating processes with smart contracts.

                  bus

                  Featured Community Projects

                    HCS-10 and Moonscape Demo: AI Agents Hackathon Workshop

                      In this workshop by Michael Kantor and Brendan Graetz, you can learn how to build and run decentralized AI agents that communicate with each other (or with humans) using the HCS-10 "Open Convey" standard on Hedera. This workshop demonstrates agent-to-agent messaging via HCS, setting up secure communication channels, and using tools like the Standards Agent Kit and LangChain for autonomous interactions. You'll also see how to use vector databases for context-aware responses.

                      Screenshot 2025-05-05 at 1.01.56 PM

                      Developer Resources

                        Tutorial: Mastering ERC-721 Tokens on Hedera with Hardhat (Part 2)

                        Dive into the second part of our ERC-721 tutorial series (video) with Hardhat, where you'll learn to implement access control, manage token URIs, pause and unpause contracts, and handle NFT transfers using Hardhat and OpenZeppelin. This hands-on guide builds upon part 1.

                          Tutorial: Monetize Your AI Agents with Revenue-Generating Topic IDs on Hedera

                          Jay demonstrates how to monetize AI agents on the Hedera network using revenue-generating topic IDs—now live on mainnet v0.59—offering greater customizability and consistent behavior.

                            Screenshot 2025-05-05 at 1.06.37 PM

                            Blog: What is gRPC, gRPC-Web, and Proxies?

                            This article dives into the roles of gRPC, gRPC-Web, and proxies in facilitating communication between web applications and blockchain networks. It explains how gRPC enables efficient service-to-service communication, while gRPC-Web extends this capability to browser-based clients. Proxies are highlighted as essential intermediaries that bridge the gap between web clients and gRPC services, ensuring seamless integration and performance.

                              Blog: Hedera Release Cycle Overview

                              This blog post explores Hedera's structured release cycle, which channels updates through previewnet and testnet before mainnet deployment to ensure stability and reliability. It also highlights the role of Project Hiero, Hedera's open-source codebase, in fostering transparent and collaborative development.

                                Blog: How Can We Model a Building in Web3?

                                This blog post explores how to represent physical buildings on-chain using NFTs and smart contracts. It outlines a system where each building is modeled as a unique NFT containing metadata like location and construction year, with additional data stored off-chain via IPFS. A factory contract automates the deployment of these building NFTs, linking them to governance, treasury, and share tokens for decentralized management and fractional ownership. This approach bridges real-world real estate with Web3 infrastructure, enabling programmable, tokenized property systems.

                                  Hedera Improvement Proposals

                                    HIP-551: Batch Transactions

                                    HIP-551 introduces a mechanism for executing multiple Hedera API (HAPI) transactions atomically within a single network transaction. This ensures that all included operations either succeed together or fail together, adhering to the ACID properties (Atomicity, Consistency, Isolation, Durability).

                                      HIP-1084: Zero Cost EthereumTransaction on Success

                                      With the implementation of HIP-1084: Zero Cost EthereumTransaction on Success, Hedera is introducing an updated transaction fee model that will eliminate charges for successful EthereumTransactions submitted by relay operators. This change brings Hedera's fee structure more in line with Ethereum while maintaining network security and improving the network experience for relay operators.

                                        Developer Events

                                          Stay informed about upcoming Hedera developer events with our public events calendar at hedera.com/events.

                                          Screenshot 2025-05-02 at 7.29.19 PM

                                          Consensus 2025

                                            Screenshot 2025-05-05 at 4.35.24 PM

                                            Hedera AI Agents Hackathon Demos

                                              Screenshot 2025-05-02 at 7.31.01 PM

                                              ETHGlobal Prague

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