Blockchain
FAQ

Blockchain is a decentralised, distributed ledger that uses cryptography and consensus to keep data tamper-proof and transparent. Web3 builds on top of blockchain, letting users own their own assets and data, blockchain is the foundation Web3 runs on.

All three can be built with BaaS.

A smart contract is a program deployed on a blockchain that runs automatically when preset conditions are met, letting two parties transact without an intermediary. Because it is hard to change once deployed, a security audit before launch is essential.

A dApp (decentralised application) runs on a blockchain, its logic is driven by smart contracts and its data lives on-chain, so it does not depend on a single centralised server.

Both are blockchain consensus mechanisms. PoW produces blocks through computational competition (like Bitcoin) and uses more energy; PoS has holders stake assets to become validators that produce blocks, using far less energy. On PoS chains you can take part in staking through validator hosting.

The three models trade off control against operational cost differently.

If your goal is PoS staking and earning validator rewards, choose validator & node hosting (standardised plans, public pricing). If you need custom chains, hybrid nodes or broader infrastructure, choose BaaS.

An RPC node lets applications connect directly to a blockchain to read and write data, it is the connection point for dApps and protocols. UD provides RPC node hosting through BaaS.

Traditional cloud centralises files on its servers; IPFS uses content addressing (CIDs) to store files across many nodes, resisting single points of failure and censorship, ideal for NFTs and Web3 content. Files must be pinned to stay available.

Nodes and infrastructure cover the major chains below, with standard validator-hosting plans for six of them.

NFTs can serve as membership credentials, marketing tools, royalty streams, product tokenization and passes into the metaverse.

It suits traditional institutions phasing financial services on-chain, and teams building entirely new on-chain finance apps, covering deposits, lending, swaps and payments.

GameFi brings blockchain and financial mechanics into games, players can earn through Play-to-Earn and truly own their on-chain assets.

Tokenization represents a product, service or asset as tokens on-chain; tokenomics is the design of a token’s supply, distribution and incentives.

All are token issuance and crowdfunding models, differing mainly in the issuance venue and regulation.

Merchants accept crypto and fiat through the platform, convert balances to fiat or a cold wallet, and reconcile through a unified report.

OTC (over-the-counter) settles large trades by private agreement outside public exchanges, reducing market-price impact and speeding settlement.

The two make opposite trade-offs between security and convenience, suited to different uses of funds.

Whoever holds the private keys controls the assets. Across its node and infrastructure services, UD never holds client keys, so ownership and data security stay with the client, fundamentally different from exchange-style custody.

They span the application, user, network, system and consensus layers, plus flaws in smart-contract code.

An audit thoroughly reviews contract code to find bugs and security holes and recommends fixes. Because a blockchain is immutable, audits should be completed before a project goes live.

The following are factual statements, not legal advice. What applies depends on your business; consult a licensed professional.

No. UD handles technical design and implementation; legal advice, securities classification and licence applications should go to licensed professionals, with UD supporting on the technical side.

They may, depending on your business and jurisdiction. Merchants should consult a licensed adviser on anti-money-laundering (AML) and know-your-customer (KYC) requirements; UD handles the technical platform setup and support.

Some have public pricing (validator hosting, IPFS, NFT marketplace); the rest are custom-quoted by project scope. Send an enquiry and the team will assess and propose a plan.

Many infrastructure services can be rented monthly or by project, paid in crypto or fiat. Final terms follow the quote at enquiry.

It starts with consultation and requirements, then solution design, development and testing, deployment, and ongoing monitoring, with UD coordinating infrastructure, application development and security end-to-end.

Infrastructure services come with a 99.99% uptime SLA and 24/7 monitoring, with a local team watching node and system health.

A Hong Kong blockchain pioneer since 2017, UD offers end-to-end solutions from infrastructure and application development to fund custody, and never holds client private keys.

From infrastructure and applications to fund custody, covering the solutions below.

Yes. They integrate with one another, for example, hosting a DeFi app on BaaS, storing NFT assets on IPFS, and protecting the whole project with our security solution, all coordinated by one local team.