
Citadel Wallet
Citadel Wallet is a specialized hardware wallet designed to offer robust security and a seamless user experience for individuals interacting with the Hedera Hashgraph network. Its development was supported by HeadStarter's Builder Labs.
It features a full suite of secure storage options focused on providing secure storage and transaction capabilities for Hedera's native cryptocurrency, HBAR, as well as Hedera Token Service (HTS) tokens and non-fungible tokens (NFTs).
The Citadel Wallet device emphasizes high-grade security, incorporating features such as Common Criterial Evaluation Assurance Level 6+ (EAL8+) certified Secure Element and a secure microprocessor featuring Trust Zone technology to protect users' private keys offline.
Citadel Wallet is engineered to support the full spectrum of Hedera network services, including native staking, interaction with smart contracts, and management of various Hedera-based assets. It also features a user-friendly interface and offers both USB-C and secure Bluetooth connectivity for flexible interaction with companion applications and decentralized applications (DApps) within the Hedera ecosystem.
Project Information
Related Projects

RealityPlus is a Web3-focused company developing innovative gaming and metaverse experiences. The company specializes in creating bespoke games, NFT marketplaces, and immersive online worlds for global brands, leveraging the Hedera blockchain platform.
A key aspect of RealityPlus' strategy involves several high-profile collaborations with AAA entertainment properties. These includes partnerships with BBC Studios to create the "Doctor Who: Worlds Apart" digital collectible card game and a "Top Gear" experience built within The Sandbox metaverse.
Another significant venture includes bringing the iconic Paul Frank character, Julius the Monkey, into the Web3 space with NFTs linked to physical merchandise. Reality Plus is also a core partner in the "RoadCode" project, an initiative with Immortal, Velon, and Hedera, aimed at revolutionizing the fan experience for professional cycling with support for major events including the Tour de France.
Reality Plus is a member of the HBAR Foundation and uses the Hedera network for all its Web3 projects with a focus on secure, transparent, and efficient Web3 solutions for major brand partners.

HaitiPay is a Haiti-based fintech company focused on digitalizing the country's economy and increasing financial inclusion for underserved communities. Its core services are delivered through an API-enabled digital banking platform. This includes a mobile wallet that is designed to be universal and telecom-agnostic, capable of turning even basic feature phones into electronic payment devices.
The platform facilitates a range of financial transactions, including local and cross-border e-payments and remittances. By enabling electronic payments, HaitiPay supports merchants in expanding their sales and provides a secure and traceable way for all users, from rural farmers to urban merchants, to access digital financial services.
In collaboration with EMTECH, a CBDC infrastructure provider, HaitiPay has developed a proof-of-concept for a potential Central Bank Digital Currency (CBDC) in Haiti. This solution is built on the Hedera public distributed ledger, chosen for its high throughput, low fees, and security. This integration is designed to lower the cost of payments and provide seamless access to digital cash.

The Hyperledger Fabric plugin for Hedera Consensus Service (HCS) enables Hyperledger Fabric networks to utilize the Hedera public network for transaction ordering. This plugin allows developers to replace or augment traditional Fabric ordering services such as Raft or Kafka with HCS, leveraging Hedera's asynchronous Byzantine Fault Tolerant (aBFT) consensus mechanism.
The core function of the plugin is to have Fabric orderer nodes submit endorsed transactions to a designated topic on the Hedera Consensus Service. HCS then assigns these transactions a unique, immutable, and verifiable consensus timestamp and sequence. Fabric orderers subscribe to this topic via a Hedera mirror node, retrieve the ordered transactions, and use this sequence to consistently form blocks and propagate them within the private Fabric network.
By integrating HCS, Hyperledger Fabric applications gain several benefits including enhanced trust and decentralization in the ordering process, public verifiability of transaction sequences for increased auditability, and potentially reduced operational complexity compared to managing a traditional private ordering service.

Logstash is an open-source, server-side data processing pipeline from Elastic NV. It ingests data from multiple sources simultaneously, transforms it, and then sends it to a chosen destination. It is a core component of the Elastic Stack, often used for centralizing and processing logs, metrics, and other event data.
In the context of the Hedera blockchain network, Logstash can be integrated using tools such as the logstash-output-hedera plugin. This specific Java Output Plugin is designed for the Hedera Consensus Service (HCS). It enables Logstash to send processed events or logs directly to an HCS topic. Users configure the plugin by specifying details including their HCS topic ID, an operator account ID, and the associated private key for that operator account. An optional submit key used for topic creation can also be provided, along with the target Hedera network, which can be "mainnet" or "testnet".
By using this plugin, applications can leverage Logstash's data collection and transformation capabilities to then record events onto the Hedera public ledger via HCS. This creates an immutable, verifiable, and timestamped log of the data, enhancing transparency and auditability for any system employing this integration.
