Pages:
Author

Topic: [ANN][CRW] CROWN (SHA256) | Platform | Governance | Systemnodes | Masternodes | - page 5. (Read 316960 times)

jr. member
Activity: 73
Merit: 1
CROWN CRW exploit MN with RaspiBlitz New Version 1.4 released Smiley

This release has 2 assets:

Source code (zip)
Source code (tar.gz)

https://github.com/rootzoll/raspiblitz/releases/tag/v1.4

Beside many small improvements and changes, these are most important changes:

the full Tutorial how to build a RaspiBlitz in the README https://github.com/rootzoll/raspiblitz/blob/master/README.md or follow the instructions to update to the latest version https://github.com/rootzoll/raspiblitz/blob/master/README.md#updating-raspiblitz-to-new-version

Update: LND version 0.9.0-beta
Update: bitcoin-core version 19.0.1-beta
Update: litecoin version 0.17.1-beta
Update: RTL (Ride the Lightning) Web UI version 0.6.7-beta (redesign)
Update: Touchscreen UI (Node Info & Donate)
Update: Fee Report on LCD
Update: TORv2 -> TORv3
Update: New Torrent files
New: ElectRS (Electrum Server in Rust) details
New: BTCPayServer (Cryptocurrency Payment Processor) details
New: LNDmanage (Advanced Channel Management CLI) details
New: BTC-RPC-Explorer (Bitcoin Blockchain Explorer) details
New: Loop (Submarine Swaps Service) details
New: LNBits (Lightning wallet/accounts System) details
New: Fully Noded (iOS) details
New: TOR Support to connect mobile Apps
New: Migration Export/Import (e.g. HDD -> SSD) details
New: Start without LCD (switch to HDMI) details
New: Recovery Sheet (PDF) details
Experimental: BTRFS details
update: New Shopping Lists with RaspberryPi 4
Update: LND version 0.7.1-beta (fix for CVE-2019-12999)
Update: bitcoin-core version 0.18.1-beta
Update: RTL (Ride the Lightning) Web UI version 0.4.2 -beta
Update: Blockchain Index not needed anymore
Update: New Torrent files
New: Logo (see folder raspiblitz/logos)
New: Sync/Validate Blockchain as default for RP4
New: Switch on TOR during setup
New: Support Zap Mobile for Android
New: Repair Options in main menu
New: UPNP (AutoNAT) support in services menu
New: LCD rotate 180 degrees in services menu
Fix: TOR switch on/off
Fix: Zap iOS Mobile Wallet connect
Fix: Shango Mobile Wallet connect
Experimental: LCD Touchscreen Support
Experimental: UPS support (APC) details


newbie
Activity: 39
Merit: 0
newbie
Activity: 32
Merit: 0
Sorry, but I'had mined somes crown since a long time ago..

But ever the same problem like wallet contains the address and private key, but not updating TxIndex cause they'are mining bonus transactions..

A long time ago, and I'v not enough just two U1 usb asic and an old antimner (first gen like S1)

And a script gridseed..



Ha HA HA!!!
A SHA stories....

And others algo... Grin Grin Grin Grin Grin
hero member
Activity: 805
Merit: 500
@crowncoin_knight how should the fundraising process for the marketing plan be carried out? Under what conditions?

there will be a medium article available about the fundraising this weekend
newbie
Activity: 9
Merit: 0
@crowncoin_knight how should the fundraising process for the marketing plan be carried out? Under what conditions?
hero member
Activity: 805
Merit: 500


Crown non-development meeting minutes 06/02/2020
Keeping the community informed

Present: crowncoin-knight, pjcltd, walkjivefly

There was no development progress meeting yesterday. Instead a few contributors had a short discussion about NFT framework testing, strategy regarding the forthcoming “Emerald” release, and the marketing plan for it.

The level of NFT framework testing/experimentation appears to be very low with no testnet activity except from walkjivefly and defunctec. There has been no feedback from any other contributors in Discord or Gitlab. We can only hope the reasons are

* other community members, 3rd-party developers and experimenters are using sandbox environments instead, and
* Artem’s code is rock solid with none of them hitting any issues.

The marketing team lead by Crownfan and KalayaanCrypto have created a comprehensive marketing plan (see below) for the Emerald release. They require that the complete funding for this plan be secured upfront so that there is no chance of not being able to complete it. If funding is not secured then the campaign will not be launched. We are expecting a Medium article from Crownfan this weekend explaining the matter in greater detail.

Crown Platform has signed up as a sponsor of the Coinfest 2020 (see below) meeting in Manchester on the 3rd to 5th of April 2020. We will have a several person presence there for the full three days of the event and expect to be able to demonstrate the NFT framework through defunctec’s Crown Cards application and hopefully other 3rd-party use-cases.

We discussed the timing of the v0.14.0 “Emerald” mainnet release. We are keen to launch it around the start of March with the marketing campaign kicking off at the same time. However, there is an argument for delaying the launch of the marketing campaign, and even the Emerald release, until Coinfest. The decision will be made soon (probably within the next week) and will be influenced by the level and outcome of NFT framework testing and the success or otherwise of raising the funds for the marketing campaign.
newbie
Activity: 66
Merit: 0
My deep research led me to follow Crown because there are huge opportunities.

ETH2.0, EOS, XTZ Compare Crown CRW and its Blockchain Governance system. Besides NFT (in side chains), Smart Contracts, MN, SYSNodes, there is a nice feature because there are super reward blocks that are mined in the meantime each one is free to submit its proposals on the crowncentral at: https://crowncentral.net/proposals/generator to increment the proposal directly on the blockchain and dispatch it to all connected terminals or wallets.

Thus budgets, marketing, foundations, donations, budgets, files, documents, works, in short everything that is distributed fungible or non-fungible etc... are voted and decided by the community users who have the choice to vote 'yes' or 'no' abstention.

Each proposal is encoded in the blockchain with a Hashcode timestamp so it is not forged (POS) as well as a start date of execution "of the contract" and an end date of execution. It is called Block Start - Block end - Payment allocated from the superblock and the Remaning (month - days - years) etc... In this way there is a real decentralization in the governance of the blockchains that is included in the digital constitution of the protocols so no worries, no disputes, no attacks or usurpations. No need for forks in case of disagreement. The community (people) thus retains the right to decide.. In addition Crown CRW which is in mnPOS which consumes much less energy and even runs on a classic raspberrypi.

This system of governance is a catalyst of usefulness for example can be used as a certificate label to counter a fakenews for example, there are thousands of use cases, even to validate property links, collections, inheritances, acquisition, rental, insurance, medical, business, IoT, records, health, real estate etc... without extra cost or fallible intermediary.

Crown has dedicated itself to designing an open protocol that can support different programming languages as no training is required; developers can use the language of their choice, provided they can call crown-cli or make an RPC call via curl.

This project is technologically powerful and has been evolving since 2014. Crown is a nugget that can take off at any time because the supply side is limited and its scope is largely underestimated.

http://crwwallet.net/
newbie
Activity: 39
Merit: 0
According to the research firm Gartner, blockbuster smart contracts could bring advantages (and some disadvantages) to companies in their data management. While smart contracts could improve the quality of this data, they could in return reduce its availability...Smart contracts, a revolution in the world of Data In a press release issued on January 30, Gartner's analyst group presented its findings on a study of the potential of smart contracts for enterprise data.

https://www.gartner.com/en/newsroom/press-releases/2020-01-30-gartner-predicts-that-organizations-using-blockchain-

According to Gartner, by 2023, companies that use smart contracts - voluntarily or by external necessity - will see a 50% increase in the overall quality of their data. Conversely, these smart contracts could reduce the availability of data for these same companies by 30%. A decrease linked to the inherent risks on governance and consensus of a blockchain.

An overall positive impact: However, the net impact of smart contracts would be "positive" for data management and analysis, as they "improve the transparency, timeliness and distribution of decision making," as well as the quality of decision making, according to Gartner's findings. This is due to the continuous verification of blockchains, which makes the data "more accurate, reliable and trustworthy".

"Smart contracts are important (...) they promise an almost certain exchange of trust. Once deployed, smart blockchain contracts are immutable and irrevocable (...), which imposes a binding commitment to do or not to do something in the future. In addition, they eliminate third party intermediaries and their fees," Lydia Clougherty Jones, senior director of research at Gartner. Gartner concludes its press release by recommending that leading players in the data and analytics industry "start testing smart blockchain contracts now", first with simple processes and then to automate more complex processes. Distributed register technology (DLT), popularized by Bitcoin, has brought with it a host of new innovations. Smart contracts are a good example, and more and more research is taking their disruptive potential in various industries very seriously. Crown is also leading the way in this technology.

───▄▀▀▀▄▄▄▄▄▄▄▀▀▀▄───
───█▒▒░░░░░░░░░▒▒█───
────█░░█░░░░░█░░█────
─▄▄──█░░░▀█▀░░░█──▄▄─
█░░█─▀▄░░░░░░░▄▀─█░░█
█▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀█
█░░╦─╦╔╗╦─╔╗╔╗╔╦╗╔╗░░█
█░░║║║╠─║─║─║║║║║╠─░░█
█░░╚╩╝╚╝╚╝╚╝╚╝╩─╩╚╝░░█
jr. member
Activity: 73
Merit: 1
Quote











With the blockchain it is possible to collect unique digital assets, how does it work?

crypto-collectible
The blockchain technology has allowed the emergence of crypto currencies, these are digital assets carrying a value, they are identical, i.e. you cannot differentiate one Bitcoin from another, they all have the same characteristics. The blockchain has also made it possible to create unique digital assets to be collected, in English we speak of "collectible crypto".

The unique digital assets to be collected therefore have a certain value due to their rarity.
The blockchain secures the unique aspect of the asset, making it impossible to make a copy. The only way to obtain the collectible is to buy it from its owner or to exchange it for another collectible. This is, quite simply, the collector's item sector transposed into the digital world.



Is it possible to make money with these digital collectibles?
There are several types of collectible crypto, which have the characteristic of being rare, sometimes even legendary! They are often intimately linked to the game world.


Where do you store your collectibles?
You have to store them like crypto coins in a wallet. By using the blockchain technology and this standard, the tokens are indivisible and their uniqueness is guaranteed thanks to the blockchain.


Which games include collectibles on the blockchain?
The Ether Quest game is an RPG that allows you to lead unique soldiers to collect and train to win battles against other players. New soldiers are "released" through a mining process. A platform called "Mycryptons" allows you to collect cryptons that are representations of public figures from Donald Trump to Oprah Winfrey.  One of the most famous token collection platforms is Cryptokitties, it made the "buzz" at the end of 2017 when crypto currencies had a high valuation. A cryptokittie is a kind of kitten to collect. One of these items was bought for $120,000! This game was then taken up by the detractors of crypto-currencies who explained that the majority of the transactions made on Ethereum were only used to run a kitten collector's game...

Today, the sports sector is developing many use cases around these digital collectibles.
With the aim of building fan loyalty around unique digital figurines featuring their favourite players! Teams from Dortmund, Benfica, Real Madrid and Arsenal are the first to test this new market.


Crown CRW is in the place to tokenize all material and immaterial goods and digitize their ownership property on the blockchain engraved in forgery-proof stone!

To come with Crown's "smart contracts", it is possible to unlock the transfer of "ownership" in a temporized and decided way (in a block) at a precise date (at a specific and decided time) as for an inheritance for example .
jr. member
Activity: 73
Merit: 1
Quote
***thanks to Guillaume for his precious help

What is a non-fungible token (NFT) or non-fungible token?
While much of the market trade is done through tokens or cryptomoney, their uses are not always relevant. Indeed, if we go beyond monetary transactions, for some specific cases of exchange of unique goods or digital collectibles, we face a problem, it is for these transactions that non-fungible tokens can be useful.

To understand this, we must first ask ourselves the question of fungibility. A copy (or specimen) of a good is said to be fungible if it is interchangeable with another of the same quality and quantity, without distinction between the two. To illustrate the concept, two Bitcoins can be interchanged, even if they do not necessarily have the same transaction history. However, they are not, in theory, completely fungible, because of the history established for each. The most classic example of a fungible good is therefore coins or banknotes, which are fungible as long as the institutions that issued them allow them to exist.

An example of extreme fungibility is that of anonymous crypto-currencies, which do not have unique characteristics such as a serial number, for example.

Thus, a non-fungible token can be summarized as a token with unique characteristics, and whose value may be different from another. But it still has common attributes among all goods of the same type. The greatest examples of non-fungible goods are collectibles, such as trading cards or stamps. Indeed, while each collectible stamp belongs to the large set of "stamps", it also has unique characteristics that allow other subsets to be established and valued differently from other stamps. Similarly, non-fungible tokens may share some of their attributes with other tokens, but it is the set of the latter that makes it unique.

But then how does non-fungibility fit into cryptomoney? If we look at the different cryptocurrency and tokens in the ecosystem, we find a lot of fungibility. The units of bitcoins and ethers are all fungible - in principle - and the same goes for stablecoins.



For example: NFTs in video games.
The video game industry - or rather the niche of video games that are meant to be decentralized - quickly understood the interest of these unique tokens. Indeed, these tokens can easily represent many objects that are currently traded in existing video games. And that doesn't necessarily represent in-game purchases against virtual and worthless currencies, but also in hard currency. Using NFTs for these various in-game items would give players real ownership over them.

Let's transpose this hypothesis to one of the video games of the moment: Fortnite. This free game finances its development through its in-game shop that allows players to buy various digital items for their characters against V-bucks, the game's virtual currency. The use of non-fungible in-app or in-game digital tokens could, according to some, allow to modify the dynamics of secondary markets in these digital worlds.

These avenues are being explored by Ubisoft in particular, even if we will have to wait for the time being to see the first practical applications in the daily lives of gamers.


* It should be remembered that in this case, the global market is expected to generate more than 165 billion euros in 2019.


Let's take the example of Gods Unchained, which is a virtual card game based on the NFT. Players therefore obtain real digital ownership of the cards they have bought, which they can freely use in the game, sell or trade as they wish.

or CryptoKitties CryptoKitties is the first video game using NFTs to have contributed to the democratization of this unique token system. It was at the end of 2017 during the general enthusiasm for cryptomoney that CryptoKitties received a great success from the community. The concept is quite simple since it consists in the deployment of NFTs representing cats and their unique characteristics through a "DNA" then coded in Solidity. These cats can breed with each other and thus give birth to new cats with unique characteristics.

The value of one of these cats depends on various factors mainly related to its rarity. The generation of that cat can be a factor, knowing that there are only 50,000 cats of generation 0, and that the generation of a cat depends on those of its parents. But there are also rarer types of cats, and characteristics that are more sought after than others. The value of a particular cat depends completely on supply and demand. Purchases are made in the form of auctions.

Note that, in physical collecting contexts, some contractors or artists are considering co-integrations linking real-life physical collectibles and their property rights modelled by such tokens. This is, for example, the case of Pascal Boyart, who tokenizes some of his frescoes and then puts them up for auction in a more or less fractional form.


What future for non-fungible tokens?
The concept of NFTs gave birth to "theory" a few years ago but now, in 2020, these last technologies are still very young. But the ecosystem is continuously developing. So we can expect developments in the coming months. First of all technical, could for example allow to bring new ways of interaction between fungible and non-fungible tokens, or even to constitute NFTs encapsulating other NFTs.

The Crown NFTs solution open up a field of unlimited possibilities by giving a real property of belonging to the latter. Applicable to all sectors, Banking, Real Estate, Health, Agricultural, Identity, Presidential Voting, Insurance, Communication, Energy, Art, Consumer Goods, IoT Internet of Things, Programming modules, Depth Learning, Artificial Intelligence, Video Games and other many domains.

Crown is positioned in these totally innovative ways. That's why I suggest you get on board, communicate about Crown and share, because a lot of positive things are going to happen with Crown CRW (Roadmap), just think about it Wink

Crown is on a concrete step towards Web 3.0 and CRW to its own development code open to all.



Learn more and get on board

https://www.crownplatform.com/  --- https://crowncentral.net/ ---




hero member
Activity: 805
Merit: 500

https://medium.com/crownplatform/crown-platform-nft-framework-part-2-f713fe6cd81c

Crown Platform NFT Framework (Part 2)

In which our NFT framework developer, Artem, explains the functionality and use of the nftproto RPC


In the first article https://medium.com/crownplatform/crown-platform-nft-framework-18d88f9db76 I explained the basics of the Crown Platform NFT Framework and how to start using it. If you didn’t read it, it’s recommended to do that before going forward. Today we will discuss the generation of the NFT protocols.

Non-Fungible Token Use Cases
Before proceeding I would like to mention that non-fungible tokens are gaining more and more traction in the blockchain industry. Business owners and developers are building use cases to leverage this technology. The phrase “tokenisation of assets” became a topic of many discussions at blockchain conferences. Interest is growing because of all the possible ways the technology can be used to simplify peoples’ lives and move ownership from the hands of companies to the hands of their users. These are some use cases of how you can apply the Crown NFT Framework in:

-Highly secure supply chain applications, where the goods’ authenticity can be proven by the blockchain
-Crypto-collectibles games, for example Cryptokitties and Gods Unchained
-Different forms of certificates (ISO documents, academic credentials, etc.)
-Digital art
-Physical goods tokenisation. Property titles (houses, cars, etc.)
-Fractional ownership of physical objects
-Financial assets
-Tickets for events
-Software and hardware licensing
-Digital identity
-Proof of existence
-Limited editions of valuable data sets

Crown Community Cards
A simple use-case built to demonstrate some of the capabilities CrownPlatform and NFT’s have to offer. Crwcards.com will offer the Crown community credit card sized plastic “NFC” enabled cards with unique designs by blockdesigns.net. The card holds a link (URL) and metadata (text). Once a card is scanned by a phone, for example the link is immediately activated and the phone is taken to the users own webpage on crwcards.com. The webpage shows each card and holder the user owns along with the metadata contained in the NFT associated with the card. The text or metadata on each card and holder is a direct copy of the NFT metadata and is written in JSON format for easy digital reading.
{  
   "CardDetails": {
     "Username": "defunctec",
     "WalletAddress": "tCRWakMb8VWWj7kMcoaSKo65yT9APo1B9yA7w",
     "Tier": "1",
     "CardHash":   "c68ec016e5b28f63cb3cd2d922e6bdace5906eab54bd615d6da4514ba216c733",
     "Version": "1",
     "CreationDate": "28/01/20",
     "Active": "true"
   }
}
{
   "HolderDetails": {
     "Username": "defunctec",
     "WalletAddress": "tCRWakMb8VWWj7kMcoaSKo65yT9APo1B9yA7w",
     "Tier": "1",
     "HolderHash": "3dd3c016e5b28f63cb3cd2d922e6bdace5906eab54bd615d6da4514ba216c732",
     "Version": "1",
     "CreationDate": "28/01/20",
     "Active": "true"
   }
 }
Crwcards.com are currently researching and developing a mobile application to scan cards and holders to confirm they match with the NFT details fetched from the blockchain. The app will be simple, one swipe and the app will confirm with a green tick or a red cross.

Non-Fungible Token Protocols
As I pointed out in the previous article, when you register an NFT protocol you define a set of rules for your non-fungible tokens registry. They must comply with pre-defined rules during registration and other operations (transfer, update, delete). The NFT protocol rule set contains the list of properties defined below. In the future these rules will be extended to adapt to other developers’ needs:

Token Protocol Id
NF token protocol unique symbol/identifier, can be an a abbreviated name describing this NF token type. Represented as a base32 string, can only contain characters: .abcdefghijklmnopqrstuvwxyz12345. Minimum length 3 symbols, maximum length 12 symbols.

Token Protocol Name
Full name for this NF token type/protocol. Minimum length 3 symbols, maximum length 24 symbols.

Token Metadata Schema URI
URI to schema (json/xml/binary) describing metadata format.
Token Metadata Mime Type
MIME type describing metadata content type, default: "text/plain".
Is Token Transferable
Defines if this NF token type can be transferred. Default: true.
Is Metadata Embedded
Defines if metadata is embedded or contains a URI. It's recommended to use embedded metadata only if it's shorter than URI. Default: false.
NFT Registration Signature
Defines who must sign an NFT registration transaction. Possible values:
- Self-Sign. Signed by the new token owner
- Sign by the NFT protocol creator
- Sign by the NFT transaction fee payer

Maximum Metadata Size

Defines the maximum size of the NFT metadata. Default: 255. Absolute maximum size: 255.

Token Protocol Owner Address

Owner of the NF token protocol.

When you create an application that will use Crown non-fungible tokens, you should make some technical decisions first:
Create a unique NFT protocol ID and and a readable protocol name.

Define metadata mimetype, for example: application/json, text/plain, application/xml etc. Also define a metadata schema URI if needed. It should contain a schema of the chosen mimetype.

Decide if you want to embed metadata on the blockchain or just to keep a URI to the metadata. It can be an IPFS URI for example. Usually it’s recommended to keep a URI, unless it’s longer than the metadata you want to save. Also, be aware that the longer metadata field will be — the higher fee you will have to pay for it.

Decide if you want your NFTs to be transferable in the future.
Define an algorithm of how your tokens will be generated. Each token ID must be a unique 256-bit number. It can be a random number, a counter, the result of a 256-bit hash function, a combination of these methods or something else that gives a unique outcome.
One of the most important decisions you have to make is to choose the NFT Registration Signature type. This field will define who will have the authority to sign new NFT transactions of your protocol. There are always at least two signatures present in every NFT transaction. One signature is a part of standard transaction flow. That signature belongs to a private key that pays the transaction fee. The second one can be one of the three types explained below.

NFT Registration Signature Types
Sign by the NFT protocol creator — defines a rule where each NFT generated must be signed by the Token Protocol Owner Address that was registered in the protocol transaction. It creates a flow where the protocol creator can control the process of issuing new tokens. In the first article we compare Crown NFTs to the Ethereum NFTs. This type of transaction generation can be compared to the mintable ERC721 token contract. In this implementation there is a minter (or minters) who have authority to generate new tokens and assign ownership of them. This approach can be applied to many different use cases, mostly when you put some valuable assets on the blockchain, or your business logic requires ability to govern the assets generation. For example, think about the Cryptokitties collectible game. In this game you can create new kitties by minting and breeding them. It wouldn’t be much fun if you could mint or breed cats every second and everybody could gain ownership of millions of them. So there are some rules applied that won’t let you do that (check out this article if you want to find out more about how the game works). The same approach can be applied to the Crown Platform. The difference is that you will put your business logic on your application back-end, and simply define rules for the NFTs on the Crown blockchain. That logic and the rules will manage the way your tokens are generated including the mandatory signature of the protocol creator. Other use cases for such type of protocol could be: secure supply chain, proven form of certificates. physical goods tokenisation, financial assets registration, licensing, etc.
Self-Sign. The difference from the Sign by the NFT protocol creator is that an NFT must be signed by the key of the created token owner, instead of the protocol creator owner key. This approach will fit use cases where you as an application/protocol creator don’t have to approve each token generation. Of course, they still have to comply with all the protocol rules, otherwise a transaction will be rejected by the blockchain. Such a model can be applied to use cases where no approver is needed, like proof of existence of information, ownership and provenance of an artwork or similar entity, self-sign certificates, etc.

Sign by fee payer means that neither protocol owner signature nor NFT owner signature is required. A token can be generated and assigned by anybody to an arbitrary Crown address. This is the least constrained type. You can use it for the same use cases as the Self-Sign approach if your model fits into it, or something like a gift-cards application. You can also leverage it for other use cases listed above if you want to allow such type of tokens generation.

NFT protocol API
In the first article I explained how to use the nftoken APIs. In the next release you will also have access the nftproto APIs that manages creation and access to the NFT protocols:

nftproto register|list|get|getbytxid|ownerof

You can get the same list and details on each API using help nftproto or help nftproto calls from the Crown wallet command line or crown-cli tool. To register a new NFT protocol you simply have to call the nftproto register API with the defined list of rules. They will manifest the technical and business decisions about your token application.

In Part 1 we introduced a crypto-collectibles game — CryptoKnights. It’s a game where you can own digital assets that represent unique knights. Every other instance has different properties based on the DNA generation algorithm, just like with the Ethereum Cryptokitties game. Now we’ll define a list of properties for our new NFT protocol:

Protocol Id: ckt
Protocol Name: CryptoKnights Collection
Generate the NFT protocol owner address:
NFT Registration Signature: Sign by the NFT protocol creator
Metadata mimetype: application/json
Metadata schema hosted at the URL: https://api.myjson.com/bins/16m4o2
{
    "title": "Asset Metadata (Ethereum compatible metadata)",
    "type": "object",
    "properties": {
        "name": {
            "type": "string",
            "description": "Identifies the asset to which this NFT represents"
        },
        "description": {
            "type": "string",
            "description": "Describes the asset to which this NFT represents"
        },
        "image": {
            "type": "string",
            "description": "A URI pointing to a resource with mime type image/* representing the asset to which this NFT represents. Consider making any images at a width between 320 and 1080 pixels and aspect ratio between 1.91:1 and 4:5 inclusive."
        }
    }
}
The metadata will not be embedded, it will contain a link to the metadata URI
Our token should be transferable
The token generation process will be a result of the SHA256 hash function with the pre-image: concatenation of a unique number and the metadata itself

To register the protocol from the Crown command line you will make a call:
nftproto register ckt “CryptoKnights Collection” CRWKXU1RRRmizKf2J74XuZjYPxUzMd7QSsB4 2 “application/json” “https://api.myjson.com/bins/16m4o2" true false 255

As a result you will get a transaction ID: 127eca7233dc2d9130d88387f55d8931cab63935fd686935529896006217769a. To uniquely identify an NFT protocol you can use the protocol ID or the transaction ID. Now you can query information about protocol(s) using other nftproto APIs:
nftproto get ckt
result:
{
    "blockHash" : "b4f4c3d0c90afb13020be9afd86f8e523d013d2d35e2e81a4c11e97b82c466d4",
    "registrationTxHash" : "127eca7233dc2d9130d88387f55d8931cab63935fd686935529896006217769a",
    "height" : 570,
    "timestamp" : 1580224126,
    "nftProtocolId" : "ckt",
    "tokenProtocolName" : "CryptoKnights Collection",
    "tokenMetadataSchemaUri" : "https://api.myjson.com/bins/16m4o2",
    "tokenMetadataMimeType" : "application/json",
    "isTokenTransferable" : true,
    "isMetadataEmbedded" : false,
    "nftRegSign" : "SignByCreator",
    "maxMetadataSize" : 255,
    "tokenProtocolOwnerId" : "CRWKXU1RRRmizKf2J74XuZjYPxUzMd7QSsB4"
}
nftproto ownerof ckt
result:
CRWKXU1RRRmizKf2J74XuZjYPxUzMd7QSsB4
nftproto list
result:
{
    "blockHash" : "b4f4c3d0c90afb13020be9afd86f8e523d013d2d35e2e81a4c11e97b82c466d4",
    "registrationTxHash" : "127eca7233dc2d9130d88387f55d8931cab63935fd686935529896006217769a",
    "height" : 570,
    "timestamp" : 1580224126,
    "nftProtocolId" : "ckt",
    "tokenProtocolName" : "CryptoKnights Collection",
    "tokenMetadataSchemaUri" : "https://api.myjson.com/bins/16m4o2",
    "tokenMetadataMimeType" : "application/json",
    "isTokenTransferable" : true,
    "isMetadataEmbedded" : false,
    "nftRegSign" : "SignByCreator",
    "maxMetadataSize" : 255,
    "tokenProtocolOwnerId" : "CRWKXU1RRRmizKf2J74XuZjYPxUzMd7QSsB4"
}
The nftproto list is an API that will return you a list of existing NFTs based on provided arguments (use help nftproto list for the details).


If you want to have a look at more interactive tutorials, feel free to watch these videos:

NFT Protocol Registration

https://www.youtube.com/watch?v=RZal25BIV1k&feature=emb_title

NFT Reading API

https://www.youtube.com/watch?time_continue=784&v=5rvd2tLvHG4&feature=emb_title

Crown Platform Sandbox

https://youtu.be/2GywilJsaes
hero member
Activity: 805
Merit: 500

https://medium.com/crownplatform/nft-framework-v0-13-9-3-released-f0b757d9ed37

NFT Framework v0.13.9.3 released
The long awaited second part of the NFT framework has arrived in testnet

Many months ago we released the first part of NFT framework into testnet with version 0.13.9.0. At the time we expected to release the second part in September or October 2019. Unfortunately the long running crypto winter put a crimp in our plans. Fortunately our framework developer, Artem, has stuck with us and today we are finally releasing the second part of the NFT framework.

Recent community participants in Discord and Telegram know that the v0.13.9.1 code was actually available soon after last week’s development update meeting. Since then Artem has already fixed a couple of issues. He believes v0.13.9.3 is a solid basis for testers to begin thrashing and developers to begin building their applications.

In the last few days he has released three instructional videos, aimed at developers, explaining how to use the sandbox test system, how to register NFT protocols and how to query them. Yesterday he released some written documentation for those who prefer not to watch movies or who want to solidify their understanding of the new functionalities.

The release process has been something of a soft launch with no blaring marketing effort. We are saving that for the mainnet release.

Developers and experimenters have a choice of test environments. They can use private sandboxes which isolate their work from the world at large, or the public testnet which allows for wider participation. Artem expects most developers will want to begin their testing in sandboxes before deploying to a wider audience in testnet.

Community members interested in helping test the release are invited to do so in testnet. Questions and feedback are welcome through Discord (preferred) and Telegram. Bug reports directly in Gitlab are welcome too. If there’s an existing Gitlab issue you want to comment on, but you don’t have or don’t want to request a Gitlab account, you can use the gitlab-updater bot in Discord to add comments to it.

The more members who experiment with the new functionality, the more and the quicker we can find issues for Artem to address before the mainnet release. The code has already been fairly well tested so we’re not expecting to find any showstoppers. But the more people that play with it, the more chance we can find and fix minor issues ahead of the mainnet launch.

Executables for linux, Mac and Windows are available for download here. https://gitlab.crownplatform.com/crown/crown-core/pipelines/1163

The instruction video for sandbox use is here. https://www.youtube.com/watch?v=2GywilJsaes

If you want to setup a new testnet wallet or node from scratch there is a simple variation of the normal installation/upgrade script which takes care of downloading the chain snapshot available here https://gitlab.crownplatform.com/crown/crown-core/raw/Current-dev/scripts/crown-testnet-install.sh. Download it, make it executable and run it as

./crown-testnet-install.sh -b -c -j 7076

to install the linux-64 version and run it as a wallet.

If you already have a testnet wallet or node set up and simply want to update to v0.13.9.3 you can run either the script with the -j 7076 option to download the current executables.

If you are reading this more than a few days after publication check in the #testing-nft channel in Discord for the correct job number to use since it may have changed.

Artem is keen to receive feedback and your comments, questions and suggestions are welcome. The best place to make them is Discord.
jr. member
Activity: 73
Merit: 1
Hello what are the technical specifications of Crown environment? Where can I find them?

On this road https://docs.google.com/document/d/1WE9ikiSieQvyiM0iSY7hJh1h6HXIdQZJFD9jkJPW6dc/edit crown-core

and CRW source code on https://gitlab.crownplatform.com/crown/crown-core

Other: https://medium.com/crownplatform

Speak with Team in live at https://discordapp.com/invite/rB3Kr86


Since 2014, Crown Platform has evolved to provide optimal security and specific features to move to a new form of interactive channel marketing, including the ability to create:

- Non-Fungible Tokens (NFTs) is a special type of cryptographic token that represents something unique; therefore, non-fungible tokens are not interchangeable.

- Applications (DApps ), control programs for the Internet of Things. Programming modules for in-depth learning and Artificial Intelligence.

- Decentralised interoperable Blockchains within the CRW network.

- News forms of marketing and web 3.0


CROWN website: https://www.crownplatform.com/

CROWN CENTRAL: https://crowncentral.net/
https://discordapp.com/invite/rB3Kr86
https://twitter.com/crownplatform
https://www.facebook.com/crownplatform
https://www.instagram.com/crownplatform/
https://www.youtube.com/channel/UCCKAgkSSOI-fIqcAEHR1rXw
https://www.linkedin.com/company/crown-platform/
https://t.me/crownplatform

CROWN source code on https://gitlab.crownplatform.com/crown/crown-core

Speak with Team in live at https://discordapp.com/invite/rB3Kr86

CROWN BITCOINTALK https://bitcointalksearch.org/topic/anncrw-crown-sha256-platform-governance-systemnodes-masternodes-815487

CROWN MEDIUM https://medium.com/crownplatform

CROWN REDDIT https://www.reddit.com/r/Crown/

CROWN History: https://www.crownplatform.com/about/#history

Team & Contributors: https://www.crownplatform.com/about/#team

Explorer: https://chainz.cryptoid.info/crw/

CROWN NFT DOC - NFT Framework Simple assets registration on the blockchain. The NFT (non-fungible tokens) framework is a registry subsystem which enables the community to register physical or digital assets on the Crown blockchain.https://docs.google.com/document/d/1WE9ikiSieQvyiM0iSY7hJh1h6HXIdQZJFD9jkJPW6dc

CROWN NFT Framework Paper: https://medium.com/crownplatform/crown-platform-nft-framework-18d88f9db76


Crown Paper 1.0 - Governance
In this paper, the Crown team provides a brief background on the platform, introduces its governance concepts, and outlines how the project will interact with both the technology and the community. https://crownplatform.com/wp-content/uploads/2018/04/CRW1.0-Governance.pdf

Crown Paper 1.1 - Identity In this paper, Crown defines its concept of identity and explores the key driver behind the platform’s development and success. https://crownplatform.com/wp-content/uploads/2018/04/CRW1.1-Identity.pdf

Crown Paper 2.0 - Introduction & Features
In this paper, the Crown team introduces the core entities that will form the platform, and the design principles it will use alongside the development process.
https://crownplatform.com/wp-content/uploads/2018/04/CRW2.0-Introduction-Features.pdf

Crown Paper 3.0 - Applications
In this paper, Crown’s team describes its vision of how applications will fit into the platform, and how the platform will allow those applications to operate as business entities. https://crownplatform.com/wp-content/uploads/2018/04/CRW3.0-Applications.pdf

Crown Paper 4.0 - Combinations & Permutations
In this paper, the Crown team explains what makes the project unique, detailing some of the proposed use models for its platform. https://crownplatform.com/wp-content/uploads/2018/04/CRW4.0-Combinations.pdf

Crown Paper 5.0 - Symbols, Skyhooks & Survival
In this paper, the Crown team discusses the power and significance of symbols, revealing the meaning behind its namesake headdress. https://crownplatform.com/wp-content/uploads/2018/04/CRW5.0-Symbols.pdf

Crown Paper 6.0 - Sharing & Open Teams
In this paper, Crown contextualizes the relationship between economic, social and technological change, delving into how these connections influence blockchain technology and Crown’s future goals. https://crownplatform.com/wp-content/uploads/2018/04/CRW6.0-Team.pdf

Crown Paper 7.0 - A Personal Story
In this paper, one of Crown’s team members describes why he became involved with the platform. https://crownplatform.com/wp-content/uploads/2018/04/CRW7.0-Stories.pdf

Crown Paper 8.0 - Crown Atomic Features
In this paper, the Crown team discusses three development proposals for the community at large to consider and vote on. https://crownplatform.com/wp-content/uploads/2018/04/CRW8.0-Atomic.pdf

STYLING GUIDE
http://nextcloud.crownplatform.com/nextcloud/s/QapQ3eB2TFokCeQ


Contact: https://www.crownplatform.com/contact-us/



FILIP MAJOR FOUNDER OF CROWNCOIN (PRECURSOR TO CROWNPLATFORM)
https://cz.linkedin.com/in/filip-major-7937b868

JAN BRODY FOUNDER OF CROWNCOIN (PRECURSOR TO CROWNPLATFORM)
New account: https://medium.com/@janbrody

PAUL JENKINSON INFRASTRUCTURE ENGINEER
https://twitter.com/DevPJ

CROWN CENTRALE https://twitter.com/CrownPlatform

EDWARD MORRA CROWN SYSTEM ADMINISTRATOR
https://twitter.com/EdwardMorra_CRW

CAL NAUGHTON JR CROWN Platform Business Development
https://twitter.com/NaughtonJnr

ARTEM BRAZHNIKOV CROWN TECH LEAD
https://www.linkedin.com/in/artembrazhnikov/
https://twitter.com/dev_artem

ASHOT KHACHATRYAN CROWN C++ DEVELOPER
https://www.linkedin.com/in/ashkhachatryan/
https://twitter.com/ashkhachatryanh

Aitor Ibañez CROWN C++ JavaScript developer & frontend & smartContracts
https://twitter.com/aitoribanez_

CHRIS KIBBLE CROWN PR & MARKETING
https://www.linkedin.com/in/chris-kibble-test-manager/
https://twitter.com/Chr1s_K1

MATT BLACK CROWN webdeveloper
https://twitter.com/the_mattblack

OLYA SUHOVIRSKAYA CROWN SOCMA
https://www.linkedin.com/in/olya-suhovirskaya-1b363215b/

DAN JAMES CROWN STRATEGY ADVISOR
https://www.linkedin.com/in/amesdaniel/

DAVE MIDNIGHT CROWN engineer
https://twitter.com/crowntechltd

INIGO VAN DIJK WEB DEVELOPMENT
https://twitter.com/CrownInUa

And others CROWN contributors at: https://discordapp.com/invite/rB3Kr86
newbie
Activity: 9
Merit: 0
Hello what are the technical specifications of Crown environment? Where can I find them?
hero member
Activity: 805
Merit: 500


How to set up a sandbox environment for Crown developers

In this educational video for developers, Artem (Crown Tech lead) explains how to set up a sandbox testnet environment. The video has a theoretical and practical part. Watch it on the Crown youtube channel:

https://youtu.be/2GywilJsaes

hero member
Activity: 805
Merit: 500



How to work with the NFT APIs and read NFToken information on Crown Platform

https://youtu.be/5rvd2tLvHG4
hero member
Activity: 805
Merit: 500


How to register NFT Protocols and Tokens on Crown Platform

https://youtu.be/RZal25BIV1k

Third video "NFT API" comes next
hero member
Activity: 805
Merit: 500



https://medium.com/crownplatform/crown-development-meeting-minutes-23-01-2020-78cc11a1d429

Crown development meeting minutes 23/01/2020


Present: Artem, crowncoin-knight, walkjivefly

NFT Framework progress
Artem merged the 234-simple-nf-token-protocol-registraton-2 branch into Current-dev https://gitlab.crownplatform.com/crown/crown-core/tree/Current-dev. Since then he also pushed a few more commits to fix some sandbox issues and nftoken help messages. The NFT framework is now officially available for experimentation. Artem expects developers will initially want to work in private sandboxes before moving their applications to testnet. Testnet has about a dozen nodes running for anyone who wants to jump into testing there. He released the sandbox instructional video on Monday and the NFT protocol and token creation video just after this meeting. He is working on a third video explaining how to query and retrieve information from NFTs. Once all three videos are out he’ll create some written documentation.

The target audience for the videos and the planned Medium article are developers, but we encourage all interested community members to watch them and read the article. The more people that see them and start thinking about how NFTs can be used, the more people providing feedback, the better adoption will be. The videos are already, or soon will be available from several locations including Facebook and YouTube. Community members are editing them for polish but the originals are available to watch or download now from our Nextcloud server

* Sandbox video https://nextcloud.crownplatform.com/index.php/s/GMZFsMLSaHJiWgB
* Protocol and token creation video https://nextcloud.crownplatform.com/index.php/s/8aiLJmx4M2bWBWP

Community members interested in creating subtitles in their local language are invited to speak up in Discord.

BTC 0.17 core upgrade progress
Ashot was not able to attend the meeting because of personal reasons. He made no new commits this week. Hopefully he’ll post a brief report on the codebase update progress in Discord when circumstances allow. Interested parties can see the latest published state of the code on the bitcoin-merge branch in Gitlab. https://gitlab.crownplatform.com/crown/crown-core/tree/bitcoin-merge

Other dev
walkjivefly created a simple variation on the mainnet installation/upgrade script https://gitlab.crownplatform.com/crown/crown-core/raw/Current-dev/scripts/crown-testnet-install.sh to facilitate installing a testnet node or wallet.
newbie
Activity: 2
Merit: 0
This is very interesting information. Great to see the thread being kept alive  Kiss
newbie
Activity: 9
Merit: 0
This thread is one of the most interesting I've read in several months. Thank you for your comments and information about Crown CRW which is in the top 10 of Coinmarketcap but is not yet well enough known.
Pages:
Jump to: