Hi there,

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

This month, we're inviting all AI agents—and their human collaborators—to participate in the Hedera Agents Hackathon. We've also announced the winners of the ETH Denver hackathon, published a variety of new tutorials and code snippets, and upgraded Hivemind GPT, which can now retrieve information directly from the blockchain.

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

03.05.25

Announcing the Winners of ETH Denver 2025 Hedera Bounties

03.06.25

Hedera Hivemind GPT Now Retrieves On-Chain Information

03.28.25

📢 Participate in the 2025 Hedera EVM & Tooling Survey

Featured Media

Hedera HIP Talk: Release 0.58: Long Term Scheduled Transactions & Schedule Service System Contract

Hashgraph Director of Product Management Keith Kowal is joined by Sr. Technical Program Manager Torfinn Olsen on this edition of HIP Talk to explore new features implemented on the network in release 0.58 such as Long Term Scheduled Transactions (HIP-423), Schedule Service System Contract (HIP-755), further Dynamic Address Book developments, and more.

Technical Community Call: HIPs PR-1103, PR-1068 & AI Tools

Join speakers from Hashgraph and SEALCOIN in a deep dive into Hedera Improvement Proposals (HIPs) PR-1103 and PR-1068, covering quantum-resistant cryptography and new sponsored fee models. Also, explore exciting developments around AI tools on Hedera.

Featured Community Projects

Hashgraph Online Launches Standards SDK

Hashgraph Online has officially released the Standards SDK (v0.0.44), now available on npm. This open-source toolkit consolidates multiple Hashgraph Consensus Standards into a unified framework, simplifying the development process for applications on the Hedera network.

Key features of the SDK include:

HCS-10: AI Agent Communication Protocol – Facilitates the creation and registration of AI agents with secure peer-to-peer communication channels.
HCS-3: Recursion within Hedera Consensus Service – Enables web applications to reference and load resources stored on Hedera using Hashgraph Resource Locators (HRLs).
HCS-7: Smart Hashinals – Allows for the creation of dynamic NFTs whose metadata updates automatically based on smart contract state.
HCS-11: Profile Standard – Provides a systematic approach for managing identities and profiles on Hedera through account memos.

Introducing HashSphere: A Private, Permissioned Network Powered by Hedera

Hashgraph has unveiled HashSphere, a private, permissioned distributed ledger technology (DLT) network built using Hedera's enterprise-grade technology. Currently in beta, HashSphere offers enterprises the security and control of private networks while leveraging Hedera's scalability and trust. Designed to meet businesses at various stages of their blockchain journey, HashSphere ensures regulatory compliance, interoperability with Hedera's public network, and compatibility with Ethereum Virtual Machine (EVM) applications.

This solution empowers enterprises to innovate at their own pace without being confined to a single network model.

Developer Resources

Tutorial Video: Airdrop Tokens with Hedera Smart Contracts

Follow this tutorial to learn how to use the Native Hedera Token Airdrop inside of a Solidity Smart Contract. In this we build a Smart Contract which extends the Hedera System Smart Contract to create and cancel a frictionless airdrop.

Tutorial Video: How to Mint & Burn an ERC-721 Token Using Hardhat & Ethers

Learn how to use Hardhat configured for the Hedera testnet to deploy an ERC-721 token, mint a new NFT, and burn it again using Hardhat scripts. You can also explore the written tutorial.

Tutorial Series: Build a Blockchain AI Agent with Hedera & LangGraph

Learn how to run your own Hedera AI agent using the Eliza AI agent framework and LangGraph. This repository shows the different workshops that are part of this tutorial series created by DevRel Brendan Graetz.

Tutorial Video: Build a Blockchain AI Agent with LangGraph + Hedera, from scratch (Part 1)

In this hands-on tutorial, we'll build an AI-powered Blockchain Agent from scratch using LangGraph, LangChain, and Hedera! We start from scratch, and walk through the full process: Setting up clients, connecting to APIs, and integrating an LLM via OpenRouter.

Code Snippet: Deploy a Smart Contract on Hedera using Viem

This code snippets demonstrates how to connect to Hedera Testnet using Viem.

Code Snippet (JS): Create Topic With Revenue (HIP-991)

This code snippets demonstrates how to connect to Hedera Testnet using Viem.

Q&A: Trying to send funds to a long zero (0x0000...0abcd) address

This StackOverflow question addresses challenges encountered when attempting to send HBAR to a converted Solidity address using ethers.js.

Hedera Improvement Proposals

HIP PR-1103: Support for Post-Quantum Cryptographic Algorithm

This HIP recommends adding support for a post-quantum cryptographic algorithm, to ensure resilience against quantum computer attacks.

HIP PR-1068: Sponsored Fees

This HIP proposes an expansion to the approval and allowance network logic (i.e. CryptoApproveAllowance, NftAllowance and TokenAllowance) by allowing any account on the network to provide allowances that will sponsor the payment of the fees for another account’s submitted transactions.