Alina Antonova

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Fastlane Main Network. This is the main network where the tokens hold value and should be guarded very carefully. If you are testing the network, or developing unstable software on Qtum, we highly recommend using either testnet or regtest mode.

The major features of the Qtum network include:

Compatibility with the Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts. No special solidity compiler is required to deploy your smart contract to Qtum.

A Proof of Stake consensus system which is optimized for Qtum's contract model. Any user can stake and help to secure the network. There is no voting, master nodes, or minimum amount required. There have been transactions as small as 2 Qtum that have created blocks in the past. Staking from smart contracts is under development.

The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork or other network disruption. This currently controls parameters like block size, gas prices, etc.

Uses the UTXO transaction model and is compatible with Bitcoin, allowing for existing tooling and workflows to be used with Qtum. This allows for the infamous SPV protocol to be used which is ideal for light wallets on mobile phones and IoT devices.

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Qtum Documentation and Usage Resources

These are some resources that might be helpful in understanding Qtum.

Basic usage resources:

• User guide
• Qtum-Qt Wallet Tutorial
• Qtum staking tutorial
• Qtum tutorial on Raspberry Pi
• Running Qtum on Amazon AWS using Qtum AMI
• Encrypting and unlocking wallet
• Testnet guide
• Block explorer, Older explorer

Development resources:

Qtum Book - A Developer's Guide To QTUM

Qtum contract usage

Deploying a custom token to Qtum

QtumJS document

Smart contract ICO example

Early example faucet contract

General Info about Qtum:

• CIRCLERESEARCH Qtum Primer
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Developer's Tools
• Smart contract deployment tool
• https://github.com/qtumproject/solar
• DApp JavaScript Library
• https://github.com/qtumproject/qtumjs
• A toolkit for building qtum light wallets
• https://github.com/qtumproject/qtumjs-wallet
• CORS qtumd RPC proxy for DApp
• https://github.com/qtumproject/qtumportal
• Docker images for running qtum services
• https://github.com/qtumproject/qtum-docker
• qtum.info API that powers the block explorer and the QTUM Web wallet
• https://github.com/qtumproject/qtuminfo-api#qtuminfo-api-documentation

What is Qtum Core?

Qtum Core is our primary mainnet wallet. It implements a full node and is capable of storing, validating, and distributing all history of the Qtum network. Qtum Core is considered the reference implementation for the Qtum network.

Qtum Core currently implements the following:

• Sending/Receiving QTUM coins
• Sending/Receiving QRC20 tokens on the Qtum network
• Staking and creating blocks for the Qtum network
• Creating and interacting with smart contracts
• Running a full node for distributing the blockchain to other users
• "Prune" mode, which minimizes disk usage
• Regtest mode, which enables developers to very quickly build their own private Qtum network for Dapp testing
• Testnet mode, using the public Qtum Testnet, with faucet available
• Compatibility with the Bitcoin Core set of RPC commands and APIs
• Full SegWit capability with p2sh-segwit (legacy) and bech32 (native) addresses

Alternative Wallets

Qtum Core uses a full node model, and thus requires downloading the entire blockchain. If you do not need the entire blockchain, and do not intend on developing smart contracts, it may be more ideal to use an alternative wallet such as one of our light wallets that can be synchronized in a matter of seconds.

Qtum Web Wallet

A browser wallet that supports the Ledger hardware wallet, offline cold wallet, restoration from mobile wallets, creation of QRC20 tokens and QRC1155 NFTs.

Web site https://qtumwallet.org

User documentation https://github.com/qtumproject/documents/tree/master/en/QTUM-WebWallet-usage

Qtum Electrum

A light wallet that supports the Ledger and Trezor hardware wallets and is based on the well-known Electrum wallet software.

Download: https://github.com/qtumproject/qtum-electrum/releases

iOS and Android Wallets

These wallets run on mobile devices and synchronize quickly.

Android Download: https://play.google.com/store/apps/details?id=org.qtum.newwallet

iOS Download: https://github.com/qtumproject/qtum-ios (open source, deprecated)

Qnekt Chrome Wallet

This light wallet runs in your Chrome browser as a browser extension, based on the popular MetaMask wallet.

Community Resources

Make sure to check out these resources as well for more information and to keep up to date with all the latest news about Qtum. At least 1 developer is always around, so if you're developing on Qtum and need help, we'd love to welcome you to our community.

@Qtum on Twitter https://twitter.com/qtum

Qtum blog https://blog.qtum.org/

Qtum Telegram Group https://t.me/qtumofficial, other languages available

Qtum Discord https://discordapp.com/invite/wRfmkQ9

/r/Qtum on Reddit https://www.reddit.com/r/Qtum/

Qtum.org https://qtum.org

Qtum on Facebook https://www.facebook.com/QtumOfficial/

Qtum Smart Contract Limitations

EVM smart contracts cannot receive coins from or send coins to any address type other than pay-to-pubkeyhash (starts with Q) addresses. This is due to a limitation in the EVM

Contracts are not allowed to create contracts with an initial endowment of coins. The contract must first be created, and then be sent coins in a separate transaction. Humans are also not allowed to create contracts with an initial endowment of coins.

Although all of the infrastructure is present, Qtum Core does not currently parse Solidity event data. You must parse this yourself using either searchlogs or -record-log-opcodes features.

It is not possible to send a contract coins without also executing the contract. This is also the case of Ethereum. This was promised in earlier discussions and technically does work, but due to lack of time for testing this feature was disabled.

In Qtum there can be multiple addresses used to create a proof-of-stake block. However, the EVM can only see the first output using the coinbase operation in Solidity (this address is also the one registered for the continuous staker rewards after 2000 blocks).

StarkWare improves scalability and privacy in blockchains using STARK technology, a family of cryptographic proofs that are zero-knowledge, succinct, transparent (no need for a trusted setup), and post-quantum secure. StarkWare’s software stack supports fast and trustless generation of proofs of computational integrity for general computation (which occurs off-chain) and their verification (which takes place on-chain).

History

StarkWare was founded in January 2018 by Eli Ben-Sasson (co-inventor of STARK, previously prof. of CS at Technion, founding scientist of Zcash), Uri Kolodny (serial entrepreneur), Michael Riabzev (co-inventor of STARK), and Alessandro Chiesa (founding scientist of Zcash and prof. of CS at UC Berkeley).

StarkWare has secured investments from several VCs in the crypto space across three equity rounds (totaling $111 million). It has also received a $12 million grant from the Ethereum Foundation to help scale the Ethereum network. Investors include Vitalik Buterin, Paradigm, Pantera, Sequoia, Founders Fund, DCVC, Wing, Floodgate, Intel Capital, Atomico, ConsenSys, Multicoin, Polychain, Naval Ravikant, and others.

In June 2020, StarkWare’s scaling solution, StarkEx, launched on Ethereum’s mainnet. As of March 2021, StarkWare has not launched a token and has 40+ employees.

Human Park is a next-generation Web3 experience that will empower our community to interpret the "Metaverse" in their own way. This platform will provide blended experiences, elevating what we know to be entertainment to the next level.

This Wiki will be an evolving base of information that will give you everything you need to know to start your journey in “the Park.”

You will be able to stay up to date with everything we are working on. Our Roadmap will show what to look forward to and joining our social channels will give you the latest conversations regarding Human Park.

Join our social channels so you don’t miss out on any events!

See you in the Park!

The Celsius Network token (CEL) is an ethereum (ERC20) utility token that powers the Celsius Network Ecosystem. Users are incentivised to both use and hold the token.

Utility Token

Better earning rates. Users of the platform can decide to earn interest income in CEL for a boost in yield when depositing assets.

Better dollar and coin loan rates. Users of the platform can decide to pay back their debt in CEL for increasing discounts when borrowing.

Access and Premium Membership

Premium membership: the Celsius Loyalty Tiers. To further increase their earning rates, users can benefit from Celsius Loyalty Tiers, a ranking system in 4 tiers (Bronze, Silver, Gold, Platinum) that rewards CEL holders with increasing bonus interest and loan discount, respective to their relative portfolio allocation in CEL.

Buy-back & make mechanism Every CEL token that is distributed as interest to Celsius users is bought from exchanges the week before. This creates a virtuous cycle, indeed the more users choose to “earn in CEL”, the more CEL Celsius has to buy, the more buying pressure the weekly buybacks add.

According to Celsius, ~93% of Celsians hold their earned CEL rather than withdrawing and selling it. (Source)

Valkyrie Digital Assets LLC, the company that created Valkyrie Bitcoin Trust, Valkyrie Algorand Trust and Valkyrie Polkadot Trust, announced today the launch of its fourth investment instrument, Valkyrie Dash Trust.

Dash Trust is the first investment vehicle in Valkyrie that invests exclusively in Dash (DASH), the digital asset on which the Dash network operates. The main investment objective of the trust is to reflect the intrinsic value of Dash in order to offer investors access to cryptocurrency both on an insured and cost-effective basis.

"Dash is a well-known and respected name in the field of payments in many regions of the world, which has loyal and devoted fans," said CEO of Valkyrie Investments Leah Wald. "One of our goals at Valkyrie is to enable those who are underserved by traditional financial companies to access financial services, and expanding investments in the Dash ecosystem is part of this mission."

Valkyrie Dash Trust comes alongside several other trust launches this year and precedes several additional investment instruments currently being developed by Valkyrie. It also comes just a week after the launch of DashDirect, a groundbreaking instant savings retail app that allows users to pay with Dash cryptocurrency and receive exclusive discounts on everyday purchases at more than 155,000 national chain retailers and family stores in the United States. DashDirect can be used in many familiar favorite ordinary establishments, as well as in online stores such as Best Buy, DoorDash, Instacart, CVS, Lowe's, Staples, The Home Depot, Autozone, GameStop, Chili's, Ulta, Chipotle, etc.

"The Dash community is thrilled that Valkyrie has launched Dash Trust because they are committed to learning and research about the assets they support," said Ryan Taylor, CEO of Dash Core Group. This new product allows investors to easily access Dash through brokerage accounts, including IRA, which we know many investors will appreciate."

Dash (DASH) is one of the largest, most widely used and used cryptocurrencies in the world, especially in developing countries, including the Middle East and Latin America, where high inflation and other monetary policy issues are leading people away from paper currencies towards digital assets, because they are easier to send and receive. Valkyrie aims to inform the public about the benefits of Dash and other cryptocurrencies as it launches investment tools for them.

About Valkyrie Investments Inc

Valkyrie Investments Inc. ("Valkyrie Investments") is a specialized alternative financial services firm at the intersection of traditional finance and the emerging cryptocurrency sector, whose branches seek to offer asset management, research and other services.

"Valkyrie Investments, headquartered in Nashville, strives to provide access to an emerging class of digital assets through traditional financial instruments. Valkyrie Investments is led by experienced asset managers who have previously launched several ETFs, publicly traded funds and ETPs, including digital asset funds with experience at Guggenheim Partners, UBS, Chicago Board of Trade, Chicago Mercantile Exchange and The World Bank," the company's description says.

About Dash

Dash (DASH) is digital money that, according to the developers, offers financial freedom to everyone.

"Dash allows millions of people around the world to instantly conduct secure transactions with the possibility of reuse and with virtually no commission. Dash is a leading decentralized payment solution designed to support real-world use cases.: it is accepted by sellers all over the world, available through 3300+ ATMs and 100+ exchanges worldwide. Dash is a pioneer of innovative features, including a two-tier network with motivated nodes and decentralized project management (master nodes), instant payments (InstantSend), instant immutable blockchain (ChainLocks) and much more. The development of Dash Network is supported by Dash Core Group, the largest organization funded by Dash Treasury, which supports and promotes the continuous development and integration of Dash worldwide," the description of the cryptocurrency says.