{"id":37528,"date":"2022-05-16T16:31:22","date_gmt":"2022-05-16T13:31:22","guid":{"rendered":"https:\/\/forklog.com\/en\/?p=37528"},"modified":"2025-08-29T18:05:27","modified_gmt":"2025-08-29T15:05:27","slug":"what-is-qtum","status":"publish","type":"post","link":"https:\/\/u1f987.com\/en\/what-is-qtum\/","title":{"rendered":"What is Qtum?"},"content":{"rendered":"
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What is Qtum?<\/h2>\n

Qtum<\/a> (pronounced \u201cquantum\u201d) is an open-source smart-contract platform that uses the Mutualized Proof-of-Stake consensus algorithm.<\/p>\n

The Qtum blockchain combines Bitcoin\u2019s transaction model (Unspent Transaction Output, UTXO) with the Ethereum Virtual Machine (EVM).<\/p>\n

QTUM<\/a> is the native token of the Qtum blockchain. For each block produced, validators receive a reward of 0.5 QTUM.<\/p>\n

The block reward decreases every four years. By 2045 it will drop to zero, and the maximum token supply will reach 107,822,406 QTUM.<\/p>\n

At present the Qtum token is supported by more than 15 wallets and 30 cryptocurrency exchanges. The Qtum ecosystem<\/a> includes three staking and seven payment services, as well as three platforms for launching nodes. In development are the Moonland metaverse platform and the QiSwap decentralized exchange.<\/p>\n<\/div>\n

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Who created Qtum, and when?<\/h2>\n

The platform was founded by Patrick Dai in 2016. He began his career as a product manager at Alibaba, then worked on the blockchain projects Factom, Vechain, Bitse Group and Meilink. He currently serves as chairman of the Singapore-based non-profit Qtum Chain Foundation.<\/p>\n

Qtum\u2019s chief technology officer is Neil Mahi. The lead developer is David Jansen. The project\u2019s headquarters are in Miami, USA.<\/p>\n

In 2017 the Qtum team issued 100m tokens on the Ethereum blockchain. In March that year it held an ICO, at which participants bought 51m QTUM for $15.6 million in bitcoin and Ethereum.<\/p>\n

A further 8m QTUM were purchased by private investors, and 12m QTUM remained with the development team. The remaining tokens are controlled by the Qtum Chain Foundation.<\/p>\n

Mainnet launched on September 13, 2017. After that, the ERC-20 QTUM tokens were reissued on the native blockchain.<\/p>\n<\/div>\n

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What makes Qtum distinctive?<\/h2>\n

Qtum uses the Mutualized Proof-of-Stake algorithm, a variant of Proof-of-Stake. The chance of earning a block reward depends on the ratio of a user\u2019s stake to the total amount of QTUM in staking.<\/p>\n

The Qtum team developed the Account Abstraction Layer (AAL), which presents a user\u2019s UTXOs as a single account balance, simplifying work with smart contracts.<\/p>\n

AAL supports the C, C++, Rust and Python programming languages, enabling developers to port existing applications to Qtum.<\/p>\n

To migrate DeFi protocols from Ethereum, developers can use the proxy adapter Janus<\/a>, which allows popular projects such as Uniswap<\/a> and OpenSea to run on Qtum\u2019s UTXO blockchain.<\/p>\n

In addition, the Qtum team implemented the Decentralized Governance Protocol (DGP), which lets users change core network parameters without a hard fork.<\/p>\n<\/div>\n

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How do you become a staker on Qtum?<\/h2>\n

Users can stake QTUM directly (online staking) or delegate it to another user (offline staking).<\/p>\n

For online staking you need to:<\/p>\n