Re: [ANN][Qtum]UTXO berbasis POS Smart Contract Platform | Penjualan Maret 2017

[falala69]

mau nanya nih coin mau ada ICO yah ? kalau gitu ICOnya kapan dimulai dan berakhirnya kapan ?

Biar tidak ada kesalahan bisa langsung ditanyakan di sesi Q&A Qtum di slack (https://qtumslack.herokuapp.com/) jam 10 WIB nanti. Kalo sepengetahuan saya, detail tentang token sale akan di umumin tanggal 1 maret. 

[len01]

masih lama juga ya qtum ini di mulai ico nya tapi promosi nya sangat wah dan gencar, semoga sukses ico nya

[rahmad2nd]

mau nanya nih coin mau ada ICO yah ? kalau gitu ICOnya kapan dimulai dan berakhirnya kapan ?

Ada kok rencananya bulan maret nanti dibuka kepublik yang kemaren Qtum dapat suntikan dana $1 million modal awal
itu termasuk ico cuma mungkin namanya pre-ico khusus bagi pemodal besar, ini lengkapnya di tulis di artikel bitcoin magazine

Qtum plans to have a crowdsale to cover the development costs of the project on March 1, 2017, through their website and exchanges.
https://bitcoinmagazine.com/articles/qtum-connecting-blockchain-technology-with-the-commercial-world-1484145776/

[barnes13]

Saya bertanya di sesi tanya jawab di Qtum slack channel mengenai exchange yang akan ngehost crowdsale Qtum, jawaban dari Patrick Dai selaku Cofounder Qtum adalah:

"We will have 3 exchanges support the crowdsale+1 crowdfunding platform+ Qtum official website, so you can choose one of these 5 to participate"

Jadi crowdsale akan di ada di 3 exchange 1 crowdfunding platform dan 1 lagi di Qtum official jadi yang kurang nyaman dengan exchange dari china bisa pilih Qtum official.

[rindo]

Saya bertanya di sesi tanya jawab di Qtum slack channel mengenai exchange yang akan ngehost crowdsale Qtum, jawaban dari Patrick Dai selaku Cofounder Qtum adalah:

"We will have 3 exchanges support the crowdsale+1 crowdfunding platform+ Qtum official website, so you can choose one of these 5 to participate"

Jadi crowdsale akan di ada di 3 exchange 1 crowdfunding platform dan 1 lagi di Qtum official jadi yang kurang nyaman dengan exchange dari china bisa pilih Qtum official.

wanjirr keren ada 3 situs buat crowdsale nya bakal seru neh kayanya eh ngomong'' nama stus exchanges yang dari cina apa ? , gak ikutan nyimak ke slack jadi gak tau, kalo boleh tau ada info'' penting apa aja lagi om barnes13 ?

[liangpodol]

Saya bertanya di sesi tanya jawab di Qtum slack channel mengenai exchange yang akan ngehost crowdsale Qtum, jawaban dari Patrick Dai selaku Cofounder Qtum adalah:

"We will have 3 exchanges support the crowdsale+1 crowdfunding platform+ Qtum official website, so you can choose one of these 5 to participate"

Jadi crowdsale akan di ada di 3 exchange 1 crowdfunding platform dan 1 lagi di Qtum official jadi yang kurang nyaman dengan exchange dari china bisa pilih Qtum official.

ane yakin nih hari pertama ico qtum bakal tembus ratusan BTC jika melihat strategi qtum dengan menyediakan 3 tempat untuk para peserta yang berminat invest akan lebih mudah terutama dengan exchange asal china sangat yakin akan mendapatkan investor yg banyak.

[falala69]

wanjirr keren ada 3 situs buat crowdsale nya bakal seru neh kayanya eh ngomong'' nama stus exchanges yang dari cina apa ? , gak ikutan nyimak ke slack jadi gak tau, kalo boleh tau ada info'' penting apa aja lagi om barnes13 ?

Here you go, tolong di koreksi jika saya salah tangkap informasi dari Q&A di slack tadi.  

• Crowdsale token Qtum di mulai dari tanggal 1 Maret
• Pembelian token bisa menggunakan BTC dan ETH (Untuk alt coin masih dibelum di tentukan)
• Terdapat 100 million Qtum token
• Inflasi harga token pertahun sekitar 1%
• Test net dan publikasi source code pada bulan Juni atau Juli
• Crowdsale tokennya bukan di Poloniex dan OKcoin

[barnes13]

Saya bertanya di sesi tanya jawab di Qtum slack channel mengenai exchange yang akan ngehost crowdsale Qtum, jawaban dari Patrick Dai selaku Cofounder Qtum adalah:

"We will have 3 exchanges support the crowdsale+1 crowdfunding platform+ Qtum official website, so you can choose one of these 5 to participate"

Jadi crowdsale akan di ada di 3 exchange 1 crowdfunding platform dan 1 lagi di Qtum official jadi yang kurang nyaman dengan exchange dari china bisa pilih Qtum official.

wanjirr keren ada 3 situs buat crowdsale nya bakal seru neh kayanya eh ngomong'' nama stus exchanges yang dari cina apa ? , gak ikutan nyimak ke slack jadi gak tau, kalo boleh tau ada info'' penting apa aja lagi om barnes13 ?

Belum di tentukan/diumumkan exchangenya apa aja, tapi mereka bilang kalau Poloniex tidak mau lagi untuk ngehost ICO (maaf kalau salah), di tunggu aja ya gan, karena saya ga bisa sepenuhnya ikut sesi tanya jawab karena ada ditempat pekerjaan, dan pusing juga lihat chat yang cepet dan terkadang ada yang nanya ke urusan pribadi .
Hanya di chat itu team Qtum bilang kalau Patrick Dai sudah sangat lama mempersiapkan proyek ini, jadi bisa dibilang proyek ini cukup matang dipersiapkan.

[JariKriting]

Saya bertanya di sesi tanya jawab di Qtum slack channel mengenai exchange yang akan ngehost crowdsale Qtum, jawaban dari Patrick Dai selaku Cofounder Qtum adalah:

"We will have 3 exchanges support the crowdsale+1 crowdfunding platform+ Qtum official website, so you can choose one of these 5 to participate"

Jadi crowdsale akan di ada di 3 exchange 1 crowdfunding platform dan 1 lagi di Qtum official jadi yang kurang nyaman dengan exchange dari china bisa pilih Qtum official.

untuk penjualan ico yang rencana nya salah satu nya akan menggukana exchanger dari china, apakah exchanger yang di gunakan adalah exchanger yang reputable populer dengan volume transaksi besar seperti huobi, okcoin atau btcchina , apakah sudah ada informasi exchanger china mana yang akan di gunakan untuk melakukan penjualan ico nya qtum coin

[Banjiro]

Saya bertanya di sesi tanya jawab di Qtum slack channel mengenai exchange yang akan ngehost crowdsale Qtum, jawaban dari Patrick Dai selaku Cofounder Qtum adalah:

"We will have 3 exchanges support the crowdsale+1 crowdfunding platform+ Qtum official website, so you can choose one of these 5 to participate"

Jadi crowdsale akan di ada di 3 exchange 1 crowdfunding platform dan 1 lagi di Qtum official jadi yang kurang nyaman dengan exchange dari china bisa pilih Qtum official.

untuk penjualan ico yang rencana nya salah satu nya akan menggukana exchanger dari china, apakah exchanger yang di gunakan adalah exchanger yang reputable populer dengan volume transaksi besar seperti huobi, okcoin atau btcchina , apakah sudah ada informasi exchanger china mana yang akan di gunakan untuk melakukan penjualan ico nya qtum coin

Kalau ke 3 exchanger china itu kelihatannya sih tidak ada informasi bahwa akan ada ico di exchanger itu terutama di huobi
jadi mungkin saja di exchanger china yg lain blm kita tahu yg mana.

[rindo]

wanjirr keren ada 3 situs buat crowdsale nya bakal seru neh kayanya eh ngomong'' nama stus exchanges yang dari cina apa ? , gak ikutan nyimak ke slack jadi gak tau, kalo boleh tau ada info'' penting apa aja lagi om barnes13 ?

Here you go, tolong di koreksi jika saya salah tangkap informasi dari Q&A di slack tadi.  

• Crowdsale token Qtum di mulai dari tanggal 1 Maret
• Pembelian token bisa menggunakan BTC dan ETH (Untuk alt coin masih dibelum di tentukan)
• Terdapat 100 million Qtum token
• Inflasi harga token pertahun sekitar 1%
• Test net dan publikasi source code pada bulan Juni atau Juli
• Crowdsale tokennya bukan di Poloniex dan OKcoin

Belum di tentukan/diumumkan exchangenya apa aja, tapi mereka bilang kalau Poloniex tidak mau lagi untuk ngehost ICO (maaf kalau salah), di tunggu aja ya gan, karena saya ga bisa sepenuhnya ikut sesi tanya jawab karena ada ditempat pekerjaan, dan pusing juga lihat chat yang cepet dan terkadang ada yang nanya ke urusan pribadi .
Hanya di chat itu team Qtum bilang kalau Patrick Dai sudah sangat lama mempersiapkan proyek ini, jadi bisa dibilang proyek ini cukup matang dipersiapkan.

Nah iya gak apa om terima kasih banyak neh info'' nya om falala69 and barnes13 nah dapat point yang bagus neh.
Di lihat dari Patrick Dai bahwa dia sudah mempersiapkan proyek ini sejak lama berarrti kesimpulan nya ini project memang sangat serious, iya sih bisa di bilang lewat campaign'' yang sudah ada, mreka keluarin banyak dana untuk promosi, sedangkan ICO nya masih jauh,semoga jeger dah neh Qtum, kita tunggu gimana kelanjutannya dan info'' selanjutnya juga

[truimpheriues]

wanjirr keren ada 3 situs buat crowdsale nya bakal seru neh kayanya eh ngomong'' nama stus exchanges yang dari cina apa ? , gak ikutan nyimak ke slack jadi gak tau, kalo boleh tau ada info'' penting apa aja lagi om barnes13 ?

Here you go, tolong di koreksi jika saya salah tangkap informasi dari Q&A di slack tadi.  

• Crowdsale token Qtum di mulai dari tanggal 1 Maret
• Pembelian token bisa menggunakan BTC dan ETH (Untuk alt coin masih dibelum di tentukan)
• Terdapat 100 million Qtum token
• Inflasi harga token pertahun sekitar 1%
• Test net dan publikasi source code pada bulan Juni atau Juli
• Crowdsale tokennya bukan di Poloniex dan OKcoin

poloniex ga pernah buka service crowdsale atau ico selling gan
dan poloniex exchanger berasal dari amerika bukan china, dan sudah di sebutkan oleh official nya qtum, penjualan ico nya yang melaui exchanger, melalui exchanger china

[barnes13]

Update terbaru dari Qtum, yang tidak ikut sesi tanya jawab bisa lihat dibawah screenshoot chat slack, panjang dan semoga bisa membantu member disini.

Qtum Update: 2 Feb 2017

Sesi tanya jawab kami dengan Patrick Dai, Jordan Earlz, dan tamu kami Bo Shen dilakukan kemarin. Postingan dibawah ini memajang list pertanyaan dan jawaban kami. Mohon untuk diperhatikan, list ini hanya jawaban dari team kami. Ada lebih dari 600 orang di channel slack kami saat ini, dan kami memiliki beberapa peserta yang aktif, jadi gambar ini beberapa sudah kami edit. Kami akan menyediakan transkip secara penuh di website kami nanti (https://qtum.org) tapi jika anda ingin membacanya secara penuh, anda dapat bergabung dengan channel slack kami.

https://qtumslack.herokuapp.com/

[falala69]

poloniex ga pernah buka service crowdsale atau ico selling gan
dan poloniex exchanger berasal dari amerika bukan china, dan sudah di sebutkan oleh official nya qtum, penjualan ico nya yang melaui exchanger, melalui exchanger china

Wah saya baru tahu mereka dr US, saya jarang cross-check hal - hal tsb. Terima kasih byk koreksi nya. 

Saya malah penasaran dengan bagaimana implementasi arsitektur Qtum itu sendiri (in code).  Berdasarkan informasi dari Patrick demo & sample code jg baru akan di rilis dalam 2 minggu lagi.

[barnes13]

Press Update dari Qtum, 8btc.com meliput tentang proyek Qtum bisa dilihat liputannya dibawah, saya belum ada waktu untuk menterjemahkannya, nanti akan saya terjemahkan secepatnya. thanks

Qtum Press Update:





8btc.com goes into depth with an article about the Qtum project:

http://news.8btc.com/the-qtum-leap-driving-smart-contracts-to-mainstream-business

Ever since an anonymous group of developers published the groundbreaking White Paper in 2009, titled “A Peer-to-Peer Electronic Cash System” – Bitcoin, the open source system it introduced, kept on delivering its promises uninterrupted.

qtum
The reliability of the network, described by the bitcoin pioneers in a clear and short document of merely nine pages, is truly unprecedented and adequately reflected in the (somewhat unbelievable) 15 billion USD market capitalization of the bitcoin ecosystem it initiated.

 

The blockchain, the technology underlying this achievement, was originally introduced to solve the “double spending problem” in peer-to-peer digital currency systems. However, soon enough it became self-evident that blockchain technology was capable of facilitating much more than allowing individuals to exchange “electronic cash” without having to rely on banks, clearing houses or any other intermediary.
In 2013, a young cryptocurrency researcher named Vitalik Buterin, only 19 at the time, proposed a scheme to generalize bitcoin’s decentralized exchange model, so it could execute far more complicated transactions, which could be tied to binary conditions. For instance: if, and only if, a set of conditions is met (like a product delivered, a service provided, etc.), then a payment should be triggered automatically and irreversibly. This re-introduced the idea of self-executing smart contracts into blockchain discourse – allowing anonymous parties to engage in direct exchange without the backing of lawyers, court orders or the police, taking the idea of intermediary-less p2p commerce to a whole new level.
Buterin and his colleagues proposed to generalize this concept of smart contracts even further, exceeding the purely economic realm of economics, and heralding a new age of decentralized computation. Since smart contracts operate on a binary if-this-then-that basis, Buterin suggested that they could serve as the basis of a decentralized programming language, able to code any application, without it having to be deployed on a centralized server. With this understanding, the Ethereum Project was born.
However, these new exciting abilities came at a price: in order to sustain the complexity of the new smart contracting platform, bitcoin’s elegant and rock solid transaction model had to be modified to the degree that interacting with the ethereum blockchain became a complicated and heavy-duty operation. While bitcoin has been running for almost a decade on, more or less, the same code, and has sparked since then numerous light-weight, mobile applications, and gateways; ethereum – with all its potential – remained a niche work-in-progress, not very well suited for massive mainstream adoption.
Preparing for a Qtum Leap
Understanding both – the enormous potential of ethereum’s decentralized computation platform, as well the importance of bitcoin’s ingenious simplicity – the Qtum team has designed a system which combines the most valuable assets of both projects.
Building on bitcoins reliable and proven-to-deliver blockchain, Qtum stacks a communication layer, allowing it to seamlessly interact with an enhanced version of the Ethereum Virtual Machine (EVM) called the Qtum Virtual Machine (QVM). With this innovation it is now possible to execute smart contracts and run decentralized applications, simply and securely, in environments that were previously out of reach for ethereum, combining the endless possibilities provided by smart contracts with the stability and maturity of the bitcoin ecosystem.
Going Mobile
One of the main advantages of bitcoin’s unspent transaction output (UTXO) model is its ability to sustain lite wallets. Lite wallets allow users to interact with the bitcoin network without having to download and sync with the entire blockchain. Instead, lite wallets use the Simplified Payment Verification (SPV) protocol, which only requires wallets to download a small part of the blockchain, while ensuring that they only receive transactions which are necessary and relevant to operate.
On ethereum, however, the entire blockchain needs to be processed to interact with the network. Therefore, if one is interested in using an ethereum-powered application, or communicating with a smart contract, one first has to download and sync the entire ethereumblockchain, which to date weighs up to 50 GB and has a monthly growth rate of 1-5 GB, depending on the ethereum client.
This state of affairs made it impossible to envision a mobile future for fully decentralized applications. Until now, that is. Qtum, based on bitcoin’s UTXO transaction model, allows applications and devices to interact with the Qtumblockchain with a lite wallet, while still being able to process smart contracts on Qtum’s Virtual Machine.
With this, it is finally possible to execute any smart contract on your mobile phone or tablet, as easily, fast and securely as sending a simple transaction from your mobile wallet. With about a half of all internet traffic to major sites being generated by mobile devices, this ability is mandatory if we want to see the massive adoption of decentralized applications (DApps), smart contracts and a p2p economy.
A Blockchain Powered Internet of Things
A smart contract fueled Internet of Things has always been among the primary goals of the decentralization movement, and rightly so. Imagine an apartment door that unlocks automatically if and when the owner receives the due payment or a rental car that can be picked up by whoever paid the fee, without having to sign forms or leave a security in escrow. Any given device could be locked or unlocked for predetermined periods, according to a smart contract where all parties agree upon in advance.
Envisioning such a decentralized sharing economy becomes much easier with Qtum’s lite wallet functionality. Instead of forcing each and every device, connected to the IoT, to act as a full node, smart devices could easily sync with the blockchain using a small amount bandwidth and storage, allowing for a much more agile and efficient network.
Scalability, Speed, and Efficiency
Both, ethereum and bitcoin, are based on a similar consensus scheme to ensure the coherence and security of their blockchain. Consensus in this respect means that all nodes in the network compare their results, so to speak, to make sure that only entries everybody agrees upon are recorded on the blockchain. There are several ways to reach consensus; the classic bitcoin/ethereum method is called Proof-of-Work (PoW) mining, which functions by agreeing that the most accurate chain of blocks is the one associated with the most work, or computational tasks, behind it. Mining makes attacks very costly due to arduous, and otherwise useless, computations demanded from miners participating in the block-verification game.
Mining is very wasteful, in both terms of energy consumption and time. Essentially, millions of devices are performing non-functional operations for the sole purpose of rendering attacks on the network expensive.
Qtum is among the first fully decentralized and Turing-complete blockchains to utilize an attractive and much more energy-efficient method to maintain coherence with a Proof-of-Stake (PoS) consensus algorithm. In a PoS environment, nodes have to pose a staking fee to participate in the validation game, which is automatically foreclosed upon if the node is shown to operate with malicious intents, hence rendering attacks costly and inefficient, without having to waste precious computational resources.
Further increasing speed and efficiency, bitcoin’s UTXO transaction model, implemented on Qtum, allows the network to process several transactions in parallel and in any given order. This is in stark contrast to ethereum’s architecture, which demands all transactions to be processed one at a time, in chronological order – making it so that at any given moment all nodes connected to the ethereum network process only one single transaction, while all other transactions have to wait in line.
Compatibility across the board
Utilizing an enhanced EVM analog, the Qtumblockchain is compatible with existing ethereum-based smart contracts. Ethereum contracts can be ported to Qtum with little to no change to their code and execute as expected. Furthermore, Qtum implements complete backwards compatibility, meaning that once a decentralized application or contract is deployed on the Qtum network, they will stay operational, even if the system is updated. With this, Qtum solves a huge problem, very well known to ethereum developers, who very often find their applications rendered useless by recurring changes to the ethereum network.
The bitcoin-based UTXO transaction model also ensures that Qtum will be mostly compatible with the existing bitcoin ecosystem, allowing Qtum users to benefit from the industry’s top-notch innovations, fueled by hundreds of millions of dollars already invested in the space. For example, if a payment gateway accepts bitcoin today, it already holds the potential to support Qtum transactions easily and link to Qtum’s API, without any significant modifications to their operation.

Bridging the Gap between Blockchains and the Business World
Despite their great potential, businesses, governments, and other legacy organizations still struggle with implementing blockchain-based solutions. These groups, in large part, aren’t using blockchain smart contracts because they operate in an isolated blockchain environment. In this respect, the greatest advantage of smart contract based commerce is also its biggest impairment.

To circumvent these technical and legal hurdles, and to unleash the full potential of the blockchain, Qtum introduces the Master Contract concept. Master Contracts allow DApps and smart contracts to trigger real-world, off-chain data inputs, auditable by a verified Oracle or the contracts mediator – while the contracts essential elements, such as participants and authorization structures, are secured on the blockchain itself.

This allows blockchain-based commerce to adhere to changing commercial rules and regulations, while interfacing with real-time data inputs from stock markets, weather forecasts, news agencies, etc..
Cooperating with a series of partners and third parties, Qtum aims to establish a smart contract hub, offering secure and thoroughly tested contract templates, tailor fitted for a multitude of industries and use cases, such as supply chain management, telecommunications, IoT, social networking, and more. With this, it will be easier than ever for established sectors and legacy institutions to interface with blockchain technology and enjoy their benefits
Conclusion
Smart contracts and DApps hold great potential for the future of both – the emerging p2p economy and the Internet sustaining it; but for them to reach mainstream adoption, decentralized applications have to be accessible, easy to use and operational on all major platforms used by the end consumer.

With this in mind, the Qtum team is building on well-established technologies like the bitcoin network, as well as on state of the art innovations, to produce a blockchain compatible with the major existing ecosystems, as well as cutting-edge capabilities these are lacking. Join us for a Qtum leap towards the future of mobile smart contracts and the mainstream adoption of decentralized applications.

[seven.71]

Press Update dari Qtum, 8btc.com meliput tentang proyek Qtum bisa dilihat liputannya dibawah, saya belum ada waktu untuk menterjemahkannya, nanti akan saya terjemahkan secepatnya. thanks

Qtum Press Update:





8btc.com goes into depth with an article about the Qtum project:

http://news.8btc.com/the-qtum-leap-driving-smart-contracts-to-mainstream-business

Ever since an anonymous group of developers published the groundbreaking White Paper in 2009, titled “A Peer-to-Peer Electronic Cash System” – Bitcoin, the open source system it introduced, kept on delivering its promises uninterrupted.

qtum
The reliability of the network, described by the bitcoin pioneers in a clear and short document of merely nine pages, is truly unprecedented and adequately reflected in the (somewhat unbelievable) 15 billion USD market capitalization of the bitcoin ecosystem it initiated.

 

The blockchain, the technology underlying this achievement, was originally introduced to solve the “double spending problem” in peer-to-peer digital currency systems. However, soon enough it became self-evident that blockchain technology was capable of facilitating much more than allowing individuals to exchange “electronic cash” without having to rely on banks, clearing houses or any other intermediary.
In 2013, a young cryptocurrency researcher named Vitalik Buterin, only 19 at the time, proposed a scheme to generalize bitcoin’s decentralized exchange model, so it could execute far more complicated transactions, which could be tied to binary conditions. For instance: if, and only if, a set of conditions is met (like a product delivered, a service provided, etc.), then a payment should be triggered automatically and irreversibly. This re-introduced the idea of self-executing smart contracts into blockchain discourse – allowing anonymous parties to engage in direct exchange without the backing of lawyers, court orders or the police, taking the idea of intermediary-less p2p commerce to a whole new level.
Buterin and his colleagues proposed to generalize this concept of smart contracts even further, exceeding the purely economic realm of economics, and heralding a new age of decentralized computation. Since smart contracts operate on a binary if-this-then-that basis, Buterin suggested that they could serve as the basis of a decentralized programming language, able to code any application, without it having to be deployed on a centralized server. With this understanding, the Ethereum Project was born.
However, these new exciting abilities came at a price: in order to sustain the complexity of the new smart contracting platform, bitcoin’s elegant and rock solid transaction model had to be modified to the degree that interacting with the ethereum blockchain became a complicated and heavy-duty operation. While bitcoin has been running for almost a decade on, more or less, the same code, and has sparked since then numerous light-weight, mobile applications, and gateways; ethereum – with all its potential – remained a niche work-in-progress, not very well suited for massive mainstream adoption.
Preparing for a Qtum Leap
Understanding both – the enormous potential of ethereum’s decentralized computation platform, as well the importance of bitcoin’s ingenious simplicity – the Qtum team has designed a system which combines the most valuable assets of both projects.
Building on bitcoins reliable and proven-to-deliver blockchain, Qtum stacks a communication layer, allowing it to seamlessly interact with an enhanced version of the Ethereum Virtual Machine (EVM) called the Qtum Virtual Machine (QVM). With this innovation it is now possible to execute smart contracts and run decentralized applications, simply and securely, in environments that were previously out of reach for ethereum, combining the endless possibilities provided by smart contracts with the stability and maturity of the bitcoin ecosystem.
Going Mobile
One of the main advantages of bitcoin’s unspent transaction output (UTXO) model is its ability to sustain lite wallets. Lite wallets allow users to interact with the bitcoin network without having to download and sync with the entire blockchain. Instead, lite wallets use the Simplified Payment Verification (SPV) protocol, which only requires wallets to download a small part of the blockchain, while ensuring that they only receive transactions which are necessary and relevant to operate.
On ethereum, however, the entire blockchain needs to be processed to interact with the network. Therefore, if one is interested in using an ethereum-powered application, or communicating with a smart contract, one first has to download and sync the entire ethereumblockchain, which to date weighs up to 50 GB and has a monthly growth rate of 1-5 GB, depending on the ethereum client.
This state of affairs made it impossible to envision a mobile future for fully decentralized applications. Until now, that is. Qtum, based on bitcoin’s UTXO transaction model, allows applications and devices to interact with the Qtumblockchain with a lite wallet, while still being able to process smart contracts on Qtum’s Virtual Machine.
With this, it is finally possible to execute any smart contract on your mobile phone or tablet, as easily, fast and securely as sending a simple transaction from your mobile wallet. With about a half of all internet traffic to major sites being generated by mobile devices, this ability is mandatory if we want to see the massive adoption of decentralized applications (DApps), smart contracts and a p2p economy.
A Blockchain Powered Internet of Things
A smart contract fueled Internet of Things has always been among the primary goals of the decentralization movement, and rightly so. Imagine an apartment door that unlocks automatically if and when the owner receives the due payment or a rental car that can be picked up by whoever paid the fee, without having to sign forms or leave a security in escrow. Any given device could be locked or unlocked for predetermined periods, according to a smart contract where all parties agree upon in advance.
Envisioning such a decentralized sharing economy becomes much easier with Qtum’s lite wallet functionality. Instead of forcing each and every device, connected to the IoT, to act as a full node, smart devices could easily sync with the blockchain using a small amount bandwidth and storage, allowing for a much more agile and efficient network.
Scalability, Speed, and Efficiency
Both, ethereum and bitcoin, are based on a similar consensus scheme to ensure the coherence and security of their blockchain. Consensus in this respect means that all nodes in the network compare their results, so to speak, to make sure that only entries everybody agrees upon are recorded on the blockchain. There are several ways to reach consensus; the classic bitcoin/ethereum method is called Proof-of-Work (PoW) mining, which functions by agreeing that the most accurate chain of blocks is the one associated with the most work, or computational tasks, behind it. Mining makes attacks very costly due to arduous, and otherwise useless, computations demanded from miners participating in the block-verification game.
Mining is very wasteful, in both terms of energy consumption and time. Essentially, millions of devices are performing non-functional operations for the sole purpose of rendering attacks on the network expensive.
Qtum is among the first fully decentralized and Turing-complete blockchains to utilize an attractive and much more energy-efficient method to maintain coherence with a Proof-of-Stake (PoS) consensus algorithm. In a PoS environment, nodes have to pose a staking fee to participate in the validation game, which is automatically foreclosed upon if the node is shown to operate with malicious intents, hence rendering attacks costly and inefficient, without having to waste precious computational resources.
Further increasing speed and efficiency, bitcoin’s UTXO transaction model, implemented on Qtum, allows the network to process several transactions in parallel and in any given order. This is in stark contrast to ethereum’s architecture, which demands all transactions to be processed one at a time, in chronological order – making it so that at any given moment all nodes connected to the ethereum network process only one single transaction, while all other transactions have to wait in line.
Compatibility across the board
Utilizing an enhanced EVM analog, the Qtumblockchain is compatible with existing ethereum-based smart contracts. Ethereum contracts can be ported to Qtum with little to no change to their code and execute as expected. Furthermore, Qtum implements complete backwards compatibility, meaning that once a decentralized application or contract is deployed on the Qtum network, they will stay operational, even if the system is updated. With this, Qtum solves a huge problem, very well known to ethereum developers, who very often find their applications rendered useless by recurring changes to the ethereum network.
The bitcoin-based UTXO transaction model also ensures that Qtum will be mostly compatible with the existing bitcoin ecosystem, allowing Qtum users to benefit from the industry’s top-notch innovations, fueled by hundreds of millions of dollars already invested in the space. For example, if a payment gateway accepts bitcoin today, it already holds the potential to support Qtum transactions easily and link to Qtum’s API, without any significant modifications to their operation.

Bridging the Gap between Blockchains and the Business World
Despite their great potential, businesses, governments, and other legacy organizations still struggle with implementing blockchain-based solutions. These groups, in large part, aren’t using blockchain smart contracts because they operate in an isolated blockchain environment. In this respect, the greatest advantage of smart contract based commerce is also its biggest impairment.

To circumvent these technical and legal hurdles, and to unleash the full potential of the blockchain, Qtum introduces the Master Contract concept. Master Contracts allow DApps and smart contracts to trigger real-world, off-chain data inputs, auditable by a verified Oracle or the contracts mediator – while the contracts essential elements, such as participants and authorization structures, are secured on the blockchain itself.

This allows blockchain-based commerce to adhere to changing commercial rules and regulations, while interfacing with real-time data inputs from stock markets, weather forecasts, news agencies, etc..
Cooperating with a series of partners and third parties, Qtum aims to establish a smart contract hub, offering secure and thoroughly tested contract templates, tailor fitted for a multitude of industries and use cases, such as supply chain management, telecommunications, IoT, social networking, and more. With this, it will be easier than ever for established sectors and legacy institutions to interface with blockchain technology and enjoy their benefits
Conclusion
Smart contracts and DApps hold great potential for the future of both – the emerging p2p economy and the Internet sustaining it; but for them to reach mainstream adoption, decentralized applications have to be accessible, easy to use and operational on all major platforms used by the end consumer.

With this in mind, the Qtum team is building on well-established technologies like the bitcoin network, as well as on state of the art innovations, to produce a blockchain compatible with the major existing ecosystems, as well as cutting-edge capabilities these are lacking. Join us for a Qtum leap towards the future of mobile smart contracts and the mainstream adoption of decentralized applications.

kalau dari news yang dibaca Qtum ini mengadopsi Smart kontrak etherum atau yang dikenal EVM karena selam ini etherum terjadi banyak masalah dari segi keamanan dan decentralisasi terhadap blockchain, nah si Dev Qtum itu sendiri memecahkan masalah dari EVM itu maka nya dia menyebut nya QVM (Qtum virtual Machine) sebagai terobosan yg terjadi dari etheum itu sendiri, jadi bisa dibilang kombinasi antara EVM dan QTM dan yang paling utama sich teknolog yang di pakai Qtum sebagai masa depan smart kontrak mobile nya itu menurut saya yang saya baca

[barnes13]

Pemberitaan dari Forbes tentang Qtum, seingat saya ICONOMI juga pernah diberitakan oleh Forbes, jadi melihat hal ini semakin menyakinkan kalau ini proyek punya potensi bagus

Qtum Press Update:





Forbes did an article about the Qtum project.  Expect to see more press over the next few days.



http://www.forbes.com/sites/rogeraitken/2017/02/06/qtum-mixing-bitcoin-ethereum-launching-proof-of-stake-smart-contracts-platform










Purporting to have a host of tech innovations in the pipeline and influential partners, the architects of the Qtum blockchain – Qtum Foundation – have gained a prominent group of Angel investors and signed up a top four accountancy firm for project governance and risk control. The founder of Kuaidi, a major Chinese car-hailing service that merged with DiDi, and a big global bitcoin holder are amongst the backers.

It was through this network that US$1m was raised last year to kickstart that the Singapore-based project, which has the ambitious goal of becoming the ‘Blockchain of China’ no less.

Having previously announced plans to meld the Bitcoin protocol with Ethereum technology, they are now launching the first ‘Proof-of-Stake’ smart contracts platform. It is all part of what the developers behind the project hope “can disrupt entire business models” by spawning a series of ideas and engagement with enthusiasts.

The Backers

A group of ten major backers have provided their financial support and opened up their network of connections to help accelerate development of the Qtum technology and infrastructure around it. However, the identity of the top accountancy firm helping with the project’s governance structure remains undisclosed for now.

“All of our investors are strategic backers as well as financial backers,” explained Patrick Dai, the 27-year co-founder of Qtum (pronounced ‘Quantum’). It is the Qtum Foundation, established last November and headquartered in Singapore, that is the decision-making body driving the project’s development.

By any measure we are talking to some big hitters on the investment scene when looking down the list of the protagonists supporting Qtum’s endeavours.

As well as Chen Weixing, the billionaire founder of Kuaidi being in the fold, there is Anthony Di Iorio, Ethereum founder and CEO of JaxxWallet; Jeremy Gardner, co-founder of Augur and EIR at Blockchain Capital; David Lee Cuo Chuen, founder of Left Coast, Libai, and DLEE Capital Management.
Recommended by Forbes

Then there is Bo Shen, General Partner at Fenbushi Capital; Jehan Chu, Managing Partner at Jen Advisors; Qingzhong Gao, director of Huawei Strategic Cooperation; Xu Star, OKCoin CEO; Lihua Yi; and, Partner of ZhongWo Investment. Add to that Xiaolai Li, one of biggest bitcoin holders in the world and a Blockchain Angel backer.

Dai, a Computer Science PhD candidate at the Chinese Academy of Sciences, commenting on the level of investment attracted said: “We raised more than we originally intended to get the project started.”

He added: “But since these backers were able to provide a great deal of technical and strategic support, we saw it as very beneficial to the project. This has enabled us to hit a few major milestones before our crowdsale.”

A former Alibaba senior product manager, Dai told Forbes that funds from this crowdsale will be used to develop the technology and “enhance the usability of the platform”.

He asserted: “Qtum is committed to creating a globally influential open source community by co-operating with other blockchain communities, third-party developers and technological innovations.” Their ultimate goal is to bring blockchain technology into industries spanning finance, social, mobile, the Internet of Things (IoT) as well as other sectors.

While they clearly want to the community to be involved in helping develop this platform, Qtum has yet to decide on a date for its crowdsale.

As a combination of Bitcoin Core, Proof-of-Stake (PoS) and the Ethereum Virtual Machine (EVM), the end product of Qtum Blockchain is Qtum Core, which will allow smart contracts to execute on a PoS consensus model.

A major Qtum goal is to build a so-called Value Transfer Protocol, which along with decentralized applications (dapps) can be used to support and enhance various industries. Another goal is to maintain compatibility with existing processes from Bitcoin and Ethereum, to be as secure as possible and to be used not just in the finance industry.

While Qtum can in theory be used just like Bitcoin to send and receive digital currency – except for the PoS modifications – the real power of Qtum centres on the Smart Contract system.

What’s The Interest?

Many consider Qtum to be the top team coming out of China given their industry expertise and enterprise interest. “Our backers like the fact that we have taken into consideration what has and has not worked for blockchain technology…and they see us building from there,” he said. And, the pioneers and the backers aim to make this technology extremely usable going forward.

Dai added: “There is high demand for China to have its own blockchain and our objective is to be the blockchain of China and gradually advance from there to be one of the top technology platforms in the world.”

The team at Qtum alongside Dai includes Jordan Earls, Qtum Core developer, and Neil Mahi, Qtum Blockchain Architect. Earls, who has been developing software since he was thirteen, reviewed over 100 altcoins and identified multiple exploits in coins.

Mahi, who has Master’s degree in Business Administration from ISCAE but specialized later on in computer science, has around twenty years’ experience developing software and four years’ experience in the blockchain space. There are also former employees from some China’s biggest companies including Alibaba, Baidu and Tencent in the team.

Bitcoin Core Protocol

From a technical perspective, Qtum is an open-source value transfer protocol and decentralized application platform, which is boldly touted as an “elegant new paradigm” combining  the stability of the Bitcoin Core protocol with an enhanced version of the EVM called the Qtum Virtual Machine (QVM).

Some have expressed the view that it is basically just another bitcoin fork with extension to the bitcoin scripting language and a new altcoin platform. The founders counter those claims.

While the Bitcoin Core is the most thoroughly tested blockchain code in the world, with billions of dollars of trust within the network and millions of dollars spent each year for the developers to maintain and enhance it, “unfortunately bitcoin is limited in what it can do with its simple script language” according to Dai.

“Primarily it’s used for sending value. On the other hand, ethereum allows for many use cases; but the source code is not as stable and secure as bitcoin’s source code,” he explained.

“The new paradigm of Qtum is where we bring the new industry-friendly consensus with a stable, safe and scalable platform. Qtum is combining the best parts of bitcoin and ethereum,” contended Dai.

As such it is claimed to be “consistent” with Bitcoin Improvement Proposals (BIPs), as it is based on Bitcoin’s unspent transaction output (UTXO) model, while allowing real-time interactions with the QVM.

Account Abstraction Layer

This is said to be accomplished by using Qtum’s Account Abstraction Layer, which allows the QVM to operate on a stable and proven platform – without the use of Ethereum’s account model. (Note: The open source project integrates the EVM with Bitcoin’s UTXO model and aims to provide smart contracts to businesses worldwide).

Dai pointed out: “Bringing a superior version of the EVM to the UTXO model does more than just allow the standard smart contracts you can perform on Ethereum. And, we plan to expand on this in the next few weeks.”

This Smart Contract and Decentralized Applications platform is further held up as allowing developers to “easily port” projects from the Ethereum blockchain to Qtum’s. But one might ask how exactly.

“All current ethereum projects can be easily ported to Qtum platform since the Qtum platform is compatible with EVM,” explained John Scianna at Qtum, who has worked for several startups included CoinPip and been following bitcoin since 2012. “The only thing a developer needs to do is to construct the states of contract and account based on the Qtum Account Abstraction Layer.”

He added: “We already have two community project. One is springemail (BiSMTP: Blockchain integrated SMTP), which we hope everyone will use their email as a wallet address, so people can send and receive cryptographic tokens through their email address. It aims aim to improve the usability of the blockchain industry.”

Likewise Qloha, is another project that will integrate into WeChat’s new mini app platform whereby people will be able to send and receive tokens through WeChat. Both these projects aim to improve the usability of the blockchain industry.

Qtum’s Roadmap

The startup has revealed that it is “constantly looking” to implement not just what designs they have now, but also to ensure that the designs they are building will be extensible and work well as a foundation to build on for their future activities.

While these are “in-flux designs”, some ideas currently being discussed include: better and faster interactions with smart contracts from SPV wallets, making data feeds a ‘first-class citizen’ on the blockchain with efficiency and usability improvements and Automatic/periodic contract execution, plus enhancing side-chain support with smart contracts.

They have also not limited themselves one particular industry, which is why they have talked to many different potential stakeholders so that they could build an “industry agnostic” platform and not be oblivious to actual business needs.

Embracing Blockchain Technology

Qtum is a compatible community that according to Dai “embraces much of the best Blockchain technology available.”

Through the use of Oracles and data feeds, Smart Contracts can be made that allow anyone to take part in a living economy. This decentralized economy model under Qtum will be fully open sourced, meaning that any developer is welcome to review the code base completely.

An Oracle is a particular agent (i.e. entity, node or address) that is trusted by the participants in the blockchain. An Oracle network can be used to implement a system for off-blockchain computations and (total or partial) contract code execution.

“Useful and exciting smart contracts operating on public blockchains may need or require to process certain data (e.g. financial, economic, business, meteorological, social) that is external to the blockchain (i.e. out-of-blockchain data),” Dai explained.

For example, the result of a smart contract execution could depend on external data such as exchange rates, the GDP of countries, temperatures in cities and sports scores amongst other data. The term data-feed refers to any system, procedure or technique used to fetch ‘off-blockchain’ data and feed it to a smart contract – or decentralized application – being executed on the blockchain.

“Platform approaches based on a blockchain with a built-in virtual machine have the limitation that every node must execute (run) all of the smart contracts in real time, leading to slower speeds and redundant processing,” Dai stated. “Then, it’s possible that smart contracts that are computationally expensive would consume (take) an enormous amount of resources when being run on the blockchain.”

Therefore, in such cases a full execution of the smart contract on the blockchain may not be the best choice. And, he indicated that it might be “better or even necessary” to run the contract or part of its source code off-blockchain, where computations can be done at a much lower cost.

Also, given the public nature of the blockchain – where data and computations are publicly visible – and the privacy requirements of many financial transactions, off-blockchain executions could be necessary to preserve the privacy of smart contracts data and transactions.

Blockchain Ecosystem & Issues

As a promising ecosystem, Qtum Blockchain as well as combining the advantages of Bitcoin and Ethereum community it is said to address the “inherited problems” of existing blockchain systems.

These problems span the lack of business-oriented smart contracts in that the current smart contract platforms are mainly based on ‘Proof-of-Work’ (PoW). However, according to a recently published Qtum whitepaper the “consensus mechanism of Proof-of-Stake is more suited for business applications.”

There is also issue of compatibility between different blockchain technologies. Bitcoin’s UTXO model, for example, is not compatible with Ethereum’s account model.

One can also add the lack of flexibility consensus mechanisms because of different participants. Requirements of consensus mechanisms in the public chains and permissioned chain are different,

Then there is the lack of consideration for business compliance requirements (i.e. identity and KYC/AML requirements of the financial industry, which the current blockchain implementations cannot fully support).

Furthermore, current blockchain systems are not open enough, with most of the triggering criteria for smart contracts being set on the blockchain itself. And, there are no triggering criteria from ‘off-chain’ data sources, which can be used to build a connection with the real world.

As to when Qtum’s platform is expected to launch in 2017, the Foundation hopes to launch it this summer. The testnet is expected to be available in a few months’ time from now.

[barnes13]

-snip-

kalau dari news yang dibaca Qtum ini mengadopsi Smart kontrak etherum atau yang dikenal EVM karena selam ini etherum terjadi banyak masalah dari segi keamanan dan decentralisasi terhadap blockchain, nah si Dev Qtum itu sendiri memecahkan masalah dari EVM itu maka nya dia menyebut nya QVM (Qtum virtual Machine) sebagai terobosan yg terjadi dari etheum itu sendiri, jadi bisa dibilang kombinasi antara EVM dan QTM dan yang paling utama sich teknolog yang di pakai Qtum sebagai masa depan smart kontrak mobile nya itu menurut saya yang saya baca

Ini adalah modifikasi dari EVM jadi bisa dibilang bahwa Qtum memperbarui atau memodifikasi Ethereum Virtual Machine yang selama ini memang masih terdapat banyak masalah. Yang jadi pertanyaan saya apakah Qtum akhirnya nanti juga bisa menggantikan Ethereum, kita lihat saja nanti pas penjualannya dimulai.

[marufnang]

-snip-

kalau dari news yang dibaca Qtum ini mengadopsi Smart kontrak etherum atau yang dikenal EVM karena selam ini etherum terjadi banyak masalah dari segi keamanan dan decentralisasi terhadap blockchain, nah si Dev Qtum itu sendiri memecahkan masalah dari EVM itu maka nya dia menyebut nya QVM (Qtum virtual Machine) sebagai terobosan yg terjadi dari etheum itu sendiri, jadi bisa dibilang kombinasi antara EVM dan QTM dan yang paling utama sich teknolog yang di pakai Qtum sebagai masa depan smart kontrak mobile nya itu menurut saya yang saya baca

Ini adalah modifikasi dari EVM jadi bisa dibilang bahwa Qtum memperbarui atau memodifikasi Ethereum Virtual Machine yang selama ini memang masih terdapat banyak masalah. Yang jadi pertanyaan saya apakah Qtum akhirnya nanti juga bisa menggantikan Ethereum, kita lihat saja nanti pas penjualannya dimulai.

Bounty campaignya seperti signature campaign dan twitter campaign kemarin dibayar dengan bitcoin ya gan??

[falala69]

Bounty campaignya seperti signature campaign dan twitter campaign kemarin dibayar dengan bitcoin ya gan??

Untuk sekarang semua bounty dibayar via btc, mungkin bisa karna token Qtum sendiri belum di buat atau memang rencana bisnis mereka terkait bounty sudah diputuskan untuk menggunakan btc