This document provides an overview of building an NFT marketplace similar to OpenSea using AWS services. It describes the key components including storing NFT assets on IPFS/S3 and metadata on the blockchain, using smart contracts to manage minting, ownership transfers and royalties, and building APIs and user interfaces to allow creators to mint/list NFTs and buyers to discover and purchase them. It also discusses using AWS services like Lambda, API Gateway, DynamoDB, and managed blockchain to build the backend infrastructure while hosting the frontend on S3/CloudFront. The goal is to create a scalable and secure marketplace for buying and selling NFT assets.
Metaverse is a digital or virtual world that will use technologies such as VR, AR, blockchain to create a unique experience for the users. On the other hand, NFTs or non-fungible tokens are a form of token that is unique in nature. These tokens are different from one another, indivisible and immutable. NFTs help represent ownership of digital assets and physical assets in the blockchain.
NFTs are a huge part of the Metaverse. Metaverse will need to have digital assets, and NFTs are perfect for representing any type of digital assets. Users can buy and sell their assets on the marketplace in the form of an NFT. Here, we will discuss the role of NFTs within the Metaverse and how various sectors within the Metaverse can use NFT for their benefits.
101 Blockchains is an educational platform where you will get access to in-depth and updated information regarding blockchain technology. As blockchain technology is a huge part of the Metaverse, we are offering an array of courses that will help you understand how Metaverse works.
The following courses will help you ->
Metaverse Fundamentals
https://academy.101blockchains.com/courses/metaverse-fundamentals
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Introduction to DeFi Course
https://academy.101blockchains.com/courses/defi-course
Tokenization Fundamentals
https://academy.101blockchains.com/courses/tokenization-fundamentals
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Learn more from our guide ->
https://101blockchains.com/nfts-and-metaverse/
We offer a realistic gaming experience with NFTs. NFT in games unlocks gaming's potential with its realistic approach to trade NFTs within the virtual world.
Non-fungible tokens are the new addition to the blockchain ecosystem. These tokens bring a new type of digital asset to the crypto community. NFT can help to tokenize almost any kind of asset you can have, starting from songs to GIFs or even Memes. However, the craze of buying NFT has led to some high-value sales.
Everydays: the First 5000 Days from Beeple definitely is one of the most expensive NFTs ever sold. Other than that, we have a series of CryptoPunks. These are also some of the most expensive NFTs in 2021. Here, we are listing out the top 10 most expensive NFTs on the market as of now.
But if you are more curious about NFTs other than just knowing about the top sales, we have a specialized course for that. 101 Blockchains are always one step ahead, bringing quality courses to help you understand the blockchain ecosystem better.
We have a full NFT course just to help you understand the depth of this new type of token. The following courses will help you stay on top of the game ->
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Ethereum Development Fundamentals Course
https://academy.101blockchains.com/courses/ethereum-development-fundamentals
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Check out our full article on this topic ->
https://101blockchains.com/most-expensive-nfts/
Monetary tokenomics is the way to use token issuance as an incentive mechanism to obtain healthy behavior from network participants in a decentralized ecosystem.
Tokens are non blockchain native digital assets which can be used as an incentive mechanism. As programmable assets they can be granted to network participants under specific conditions.
Metaverse is a digital or virtual world that will use technologies such as VR, AR, blockchain to create a unique experience for the users. On the other hand, NFTs or non-fungible tokens are a form of token that is unique in nature. These tokens are different from one another, indivisible and immutable. NFTs help represent ownership of digital assets and physical assets in the blockchain.
NFTs are a huge part of the Metaverse. Metaverse will need to have digital assets, and NFTs are perfect for representing any type of digital assets. Users can buy and sell their assets on the marketplace in the form of an NFT. Here, we will discuss the role of NFTs within the Metaverse and how various sectors within the Metaverse can use NFT for their benefits.
101 Blockchains is an educational platform where you will get access to in-depth and updated information regarding blockchain technology. As blockchain technology is a huge part of the Metaverse, we are offering an array of courses that will help you understand how Metaverse works.
The following courses will help you ->
Metaverse Fundamentals
https://academy.101blockchains.com/courses/metaverse-fundamentals
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Introduction to DeFi Course
https://academy.101blockchains.com/courses/defi-course
Tokenization Fundamentals
https://academy.101blockchains.com/courses/tokenization-fundamentals
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Learn more from our guide ->
https://101blockchains.com/nfts-and-metaverse/
We offer a realistic gaming experience with NFTs. NFT in games unlocks gaming's potential with its realistic approach to trade NFTs within the virtual world.
Non-fungible tokens are the new addition to the blockchain ecosystem. These tokens bring a new type of digital asset to the crypto community. NFT can help to tokenize almost any kind of asset you can have, starting from songs to GIFs or even Memes. However, the craze of buying NFT has led to some high-value sales.
Everydays: the First 5000 Days from Beeple definitely is one of the most expensive NFTs ever sold. Other than that, we have a series of CryptoPunks. These are also some of the most expensive NFTs in 2021. Here, we are listing out the top 10 most expensive NFTs on the market as of now.
But if you are more curious about NFTs other than just knowing about the top sales, we have a specialized course for that. 101 Blockchains are always one step ahead, bringing quality courses to help you understand the blockchain ecosystem better.
We have a full NFT course just to help you understand the depth of this new type of token. The following courses will help you stay on top of the game ->
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Ethereum Development Fundamentals Course
https://academy.101blockchains.com/courses/ethereum-development-fundamentals
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Check out our full article on this topic ->
https://101blockchains.com/most-expensive-nfts/
Monetary tokenomics is the way to use token issuance as an incentive mechanism to obtain healthy behavior from network participants in a decentralized ecosystem.
Tokens are non blockchain native digital assets which can be used as an incentive mechanism. As programmable assets they can be granted to network participants under specific conditions.
This presentation explains, what is NFT, what is art NFT, History of it and how it become famous.
One can easily understand NFT Marketplace and understand the crypto relation.
What is NFT? | A Complete Use-Cases of Non-Fungible Token (NFT)Linda John
We provide the best Non Fungible Token development services to our clients. It will help to make your own NFT for Arts, digital collectibles, gaming, etc & NFT Marketplaces, etc. Get the complete Use-Cases of NFTs.
SOURCE: https://www.blockchainappfactory.com/nft-development-services
Lecture given by Mark Billinghurst on June 18th 2022 about how the Metaverse can be used for corporate training. In particular how combining AR, VR and other Metaverse elements can be used to provide new types of learning experiences.
NFTs or non-fungible tokens are unique types of tokens that can provide ownership of a particular asset. This token is not exchangeable with another token as every NFT is different from one another. NFTs are not like other digital tokens or currencies.
There are many NFT applications. These are programmable art, authenticating luxury goods, verifying licenses and certifications, owning collectibles, tokenized sports industry, providing unstoppable domains and Ethereum name service, ownership of identification, safeguarding asset forgery, and expanding paperless transactions, etc.
NFT applications are vast and can be utilized in many sectors. To help you guide through the ecosystem, we at 101 Blockchains are offering a complete course on NFT. This course will help you understand what NFT is, but it will also give you a good idea of NFT applications.
The following courses will help you learn about NFTs->
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Ethereum Development Fundamentals Course
https://academy.101blockchains.com/courses/ethereum-development-fundamentals
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Learn more from our guides ->
https://101blockchains.com/non-fungible-tokens-nft/
https://101blockchains.com/nft-use-cases/
https://101blockchains.com/non-fungible-tokens-in-2021/
https://101blockchains.com/most-expensive-nfts/
https://101blockchains.com/nft-future-applications-and-challenges/
https://101blockchains.com/advantages-of-nfts/
https://101blockchains.com/types-of-non-fungible-tokens/
https://101blockchains.com/use-cases-of-nfts/
Non-Fungible Token (NFT) Marketplace Development Service ProviderLinda John
Non-Fungible Token Marketplace Development Company for NFT Marketplace Services. This marketplace acts as a huge revenue system for artists, musicians, and other unique creators. This is the right time to launch your own NFT Marketplace.
SOURCE: https://bit.ly/3bKgzfi
Though there are several speculations on NFT, it has been a dominating force in the market and gradually increasing its popularity. In the present time, people have a great fascination with crypto concepts. So NFT can easily retain its popularity for a long haul of time.
An Eye-Opener To Prepare An NFT Marketing ChecklistIsaCharlotte
By this time, you would have recognized a plethora of available NFT marketing services. Preparing a checklist before you reach out to a developer would make you unique from the clients and also saves your time considerably. Let’s quickly go through the preparation of the checklist for the aforementioned services.
Visit: https://www.cryptocurrencyexchangescript.com/nft-marketing-services
Agenda:
I. Metaverse Revolution
Metaverse Revolution Imperatives
Metaverse Enterprise/Industry Applications Boom
Metaverse Virtual/Creator Economy Emergence
Metaverse Infrastructure/System Architecture
II. ESG/Sustainability Imperative
ESG/Sustainability Imperative
ESG Factors/Considerations
III. Impact Investing in Metaverse
The Toolbox for Impact Investing in Metaverse
IV. Positive Impact on Sustainability
Metaverse Renewable Energy System Management
Metaverse Store for Sustainable Products
Metaverse Factory for Sustainable Manufacturing/Supply Chain
Metaverse for Sustainable Smart City Development
Metaverse NFT/DeFi Based Sustainable Financing
V. Negative Impact on Sustainability
Metaverse Infrastructure Requirements
Impact on Environment
Impact on People/Society
The artist Grimes recently sold a bunch of NFTs for nearly $6 million. Twitter CEO Jack Dorsey listed his first-ever tweet as an NFT, and the band Kings of Leon recently released their album in the form of an NFT. You might be wondering: what is an NFT, anyhow? Let’s dip our toes into the world of cryptocurrency, blockchain, and NFT’s, and explore the potential of NFT’s in the music industry.
NFTs are a type of digital token where every single token represents some form of asset. The asset can be digital or physical. Typically, NFTs are unique in nature, which means every NFT is different from one another.
NFTs are an extremely popular market, so it’s a good option to grab the opportunity and build a career on it. The growth of NFTs has been promising and, in the future, can offer higher growth as a new industry form.
There are many reasons to get a career in NFT; some of these are better income, more opportunities, flexible working hours, lifetime royalties, and exploring creativity. Other than these, you need to follow some special methods to create a lucrative career in this space.
101 Blockchains is always here to help you in your career journey within the blockchain ecosystem. We already have covered a lot of aspects within this industry. To help you out, we also have an NFT fundamentals course that will ensure you learn everything about NFTs.
The following courses will help you learn about NFTs->
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Ethereum Development Fundamentals Course
https://academy.101blockchains.com/courses/ethereum-development-fundamentals
How to Build Your Career in Enterprise Blockchains
https://academy.101blockchains.com/courses/career-in-blockchain
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Learn more from our guide ->
https://101blockchains.com/nft-minting/
A non-fungible token or NFT is a type of digital token. This type of token can’t be interchanged or replaced as every token comes with unique attributes. Understanding how NFTs work is very important. However, to do that, we need to look into the fundamentals behind this technology.
NFTs use public blockchain platforms to function. At this time, Ethereum is the most popular public platform that many of the NFT projects are using for storing or minting NFTs. Due to using blockchain, transparency regarding NFT ownership is high, as anyone can see the ownership status. ERC-721 and ERC-1155 are the only 2 token standards that can help create NFTs.
To help you better understand how NFT works, we at 101 Blockchains offer an array of courses that will help you better comprehend the topic. More so, we have an exclusive course on NFT, where we cover every single element within the ecosystem.
The following courses will help you learn about NFTs->
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Ethereum Development Fundamentals Course
https://academy.101blockchains.com/courses/ethereum-development-fundamentals
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Learn more from our guides ->
https://101blockchains.com/non-fungible-tokens-nft/
https://101blockchains.com/nft-minting/
https://101blockchains.com/buy-and-sell-nfts/
https://101blockchains.com/nft-in-blockchain/
https://101blockchains.com/nft-marketplace/
https://101blockchains.com/types-of-non-fungible-tokens/
https://101blockchains.com/nft-attributes/
https://101blockchains.com/best-nft-wallets/
https://101blockchains.com/sell-nfts-on-shopify/
Check out list of Most Popular NFT games in 2021. For more technical updates follow Game App Studio or if you want to develop a game in latest technology like NFT Gaming than we are here for you. Who provides you the best gaming NFT Gaming Solutions in USA
Ethereum Devcon1 Report (summary writing)Tomoaki Sato
Ethereum devcon1 in London, 27th November By Tomoaki Sato I have been to the conference, so I wrote this summary and doing presentation in Japan. The meetup name is "Smart Contract Japan". Some of the presentations are missing, or added.
Please refer these official sources also
Devcon
http://devcon.ethereum.org/
Devcon1 youtube presentations
https://www.youtube.com/user/ethereumproject
Devcon1 slides on reddit
https://www.reddit.com/r/ethereum/comments/3soym7/devcon_1_slides/
This presentation explains, what is NFT, what is art NFT, History of it and how it become famous.
One can easily understand NFT Marketplace and understand the crypto relation.
What is NFT? | A Complete Use-Cases of Non-Fungible Token (NFT)Linda John
We provide the best Non Fungible Token development services to our clients. It will help to make your own NFT for Arts, digital collectibles, gaming, etc & NFT Marketplaces, etc. Get the complete Use-Cases of NFTs.
SOURCE: https://www.blockchainappfactory.com/nft-development-services
Lecture given by Mark Billinghurst on June 18th 2022 about how the Metaverse can be used for corporate training. In particular how combining AR, VR and other Metaverse elements can be used to provide new types of learning experiences.
NFTs or non-fungible tokens are unique types of tokens that can provide ownership of a particular asset. This token is not exchangeable with another token as every NFT is different from one another. NFTs are not like other digital tokens or currencies.
There are many NFT applications. These are programmable art, authenticating luxury goods, verifying licenses and certifications, owning collectibles, tokenized sports industry, providing unstoppable domains and Ethereum name service, ownership of identification, safeguarding asset forgery, and expanding paperless transactions, etc.
NFT applications are vast and can be utilized in many sectors. To help you guide through the ecosystem, we at 101 Blockchains are offering a complete course on NFT. This course will help you understand what NFT is, but it will also give you a good idea of NFT applications.
The following courses will help you learn about NFTs->
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Ethereum Development Fundamentals Course
https://academy.101blockchains.com/courses/ethereum-development-fundamentals
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Learn more from our guides ->
https://101blockchains.com/non-fungible-tokens-nft/
https://101blockchains.com/nft-use-cases/
https://101blockchains.com/non-fungible-tokens-in-2021/
https://101blockchains.com/most-expensive-nfts/
https://101blockchains.com/nft-future-applications-and-challenges/
https://101blockchains.com/advantages-of-nfts/
https://101blockchains.com/types-of-non-fungible-tokens/
https://101blockchains.com/use-cases-of-nfts/
Non-Fungible Token (NFT) Marketplace Development Service ProviderLinda John
Non-Fungible Token Marketplace Development Company for NFT Marketplace Services. This marketplace acts as a huge revenue system for artists, musicians, and other unique creators. This is the right time to launch your own NFT Marketplace.
SOURCE: https://bit.ly/3bKgzfi
Though there are several speculations on NFT, it has been a dominating force in the market and gradually increasing its popularity. In the present time, people have a great fascination with crypto concepts. So NFT can easily retain its popularity for a long haul of time.
An Eye-Opener To Prepare An NFT Marketing ChecklistIsaCharlotte
By this time, you would have recognized a plethora of available NFT marketing services. Preparing a checklist before you reach out to a developer would make you unique from the clients and also saves your time considerably. Let’s quickly go through the preparation of the checklist for the aforementioned services.
Visit: https://www.cryptocurrencyexchangescript.com/nft-marketing-services
Agenda:
I. Metaverse Revolution
Metaverse Revolution Imperatives
Metaverse Enterprise/Industry Applications Boom
Metaverse Virtual/Creator Economy Emergence
Metaverse Infrastructure/System Architecture
II. ESG/Sustainability Imperative
ESG/Sustainability Imperative
ESG Factors/Considerations
III. Impact Investing in Metaverse
The Toolbox for Impact Investing in Metaverse
IV. Positive Impact on Sustainability
Metaverse Renewable Energy System Management
Metaverse Store for Sustainable Products
Metaverse Factory for Sustainable Manufacturing/Supply Chain
Metaverse for Sustainable Smart City Development
Metaverse NFT/DeFi Based Sustainable Financing
V. Negative Impact on Sustainability
Metaverse Infrastructure Requirements
Impact on Environment
Impact on People/Society
The artist Grimes recently sold a bunch of NFTs for nearly $6 million. Twitter CEO Jack Dorsey listed his first-ever tweet as an NFT, and the band Kings of Leon recently released their album in the form of an NFT. You might be wondering: what is an NFT, anyhow? Let’s dip our toes into the world of cryptocurrency, blockchain, and NFT’s, and explore the potential of NFT’s in the music industry.
NFTs are a type of digital token where every single token represents some form of asset. The asset can be digital or physical. Typically, NFTs are unique in nature, which means every NFT is different from one another.
NFTs are an extremely popular market, so it’s a good option to grab the opportunity and build a career on it. The growth of NFTs has been promising and, in the future, can offer higher growth as a new industry form.
There are many reasons to get a career in NFT; some of these are better income, more opportunities, flexible working hours, lifetime royalties, and exploring creativity. Other than these, you need to follow some special methods to create a lucrative career in this space.
101 Blockchains is always here to help you in your career journey within the blockchain ecosystem. We already have covered a lot of aspects within this industry. To help you out, we also have an NFT fundamentals course that will ensure you learn everything about NFTs.
The following courses will help you learn about NFTs->
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Ethereum Development Fundamentals Course
https://academy.101blockchains.com/courses/ethereum-development-fundamentals
How to Build Your Career in Enterprise Blockchains
https://academy.101blockchains.com/courses/career-in-blockchain
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Learn more from our guide ->
https://101blockchains.com/nft-minting/
A non-fungible token or NFT is a type of digital token. This type of token can’t be interchanged or replaced as every token comes with unique attributes. Understanding how NFTs work is very important. However, to do that, we need to look into the fundamentals behind this technology.
NFTs use public blockchain platforms to function. At this time, Ethereum is the most popular public platform that many of the NFT projects are using for storing or minting NFTs. Due to using blockchain, transparency regarding NFT ownership is high, as anyone can see the ownership status. ERC-721 and ERC-1155 are the only 2 token standards that can help create NFTs.
To help you better understand how NFT works, we at 101 Blockchains offer an array of courses that will help you better comprehend the topic. More so, we have an exclusive course on NFT, where we cover every single element within the ecosystem.
The following courses will help you learn about NFTs->
NFT Fundamentals Course
https://academy.101blockchains.com/courses/nft-fundamentals
Ethereum Development Fundamentals Course
https://academy.101blockchains.com/courses/ethereum-development-fundamentals
Learn more about the certification courses from here ->
Certified Enterprise Blockchain Professional (CEBP) course
https://academy.101blockchains.com/courses/blockchain-expert-certification
Certified Enterprise Blockchain Architect (CEBA) course
https://academy.101blockchains.com/courses/certified-enterprise-blockchain-architect
Certified Blockchain Security Expert (CBSE) course
https://academy.101blockchains.com/courses/certified-blockchain-security-expert
Learn more from our guides ->
https://101blockchains.com/non-fungible-tokens-nft/
https://101blockchains.com/nft-minting/
https://101blockchains.com/buy-and-sell-nfts/
https://101blockchains.com/nft-in-blockchain/
https://101blockchains.com/nft-marketplace/
https://101blockchains.com/types-of-non-fungible-tokens/
https://101blockchains.com/nft-attributes/
https://101blockchains.com/best-nft-wallets/
https://101blockchains.com/sell-nfts-on-shopify/
Check out list of Most Popular NFT games in 2021. For more technical updates follow Game App Studio or if you want to develop a game in latest technology like NFT Gaming than we are here for you. Who provides you the best gaming NFT Gaming Solutions in USA
Ethereum Devcon1 Report (summary writing)Tomoaki Sato
Ethereum devcon1 in London, 27th November By Tomoaki Sato I have been to the conference, so I wrote this summary and doing presentation in Japan. The meetup name is "Smart Contract Japan". Some of the presentations are missing, or added.
Please refer these official sources also
Devcon
http://devcon.ethereum.org/
Devcon1 youtube presentations
https://www.youtube.com/user/ethereumproject
Devcon1 slides on reddit
https://www.reddit.com/r/ethereum/comments/3soym7/devcon_1_slides/
Building decentralized applications (dapps) on Ethereum - Eva Shon, & Igor Li...WithTheBest
Learn how to build Dapps using: Open source tools (Truffle, IPFS, Lightwallet and BTC Relay), ConsenSys tools (BlockApps API and Microsoft Azure BlockApps nodes) and other ConsenSys tools (MetaMask, a Chrome Ethereum plugin, or uPort, an ID management system).
Eva Shon & Igor Lilic, ConsenSys
ABCN - Ace Blockchain Cyber Network is an ecosystem of essential web3 and
crypto products built on Ace Blockchain Cyber Network and tokenized by ABCN
token.
Hands-on introduction to blockchain technologies.
First, basic concepts as peer-to-peer networks, mining and distributed consens are introduced basd on the Bitcoin protocol. Next smart contracts are discussed for the Ethereum protocol and demonstrated using a local/private blockchain.
The session concludes with a live demo of the interaction of a Java based classical business application with a smart contract running in the Ethereum network.
The goal of the session is to provide a meaningful background of blockchain technologies in genral and to enable developers to start exploring Ethereum and smart contracts within a few hours.
The proposed development setup is oriented towards Java developers and contains Docker images for the Geth and TestRPC Ethereum clients that can be run locally. To access Ethereum from Java the web3j Java library is used. The business application that integrates with the smart contracts is built with the Eclipse Scout framework.
Slides have been created by @ZimMatthias for the JUG Switzerland session on May 22, 2017 https://www.jug.ch/html/events/2017/blockchain_ethereum.html
Coding Workshop : how to create your own crypto currency and NFT
Learn to create your own cryptocurrency coin or token with a mix of blockchain development, and smart contracts and a webpage.
Metpass NFT holder is highly prioritized
Agenda:
• 1. Related terms & structure introduction
• 2. Development software tools and development environment
• 3. Create crypto currency
• 4. Create user interface
• 5. transfer crypto currency
• 6. check the balance of crypto currency
• 7. Introduce mainstream currencies – ERC20
Ryan Stortz & Sophia D'Antoine - “EVM2VEC: Bug Discovery in Smart Contracts”Hacken_Ecosystem
Sophia D'Antoine and Ryan Stortz on the topic “EVM2VEC: Bug Discovery in Smart Contracts”
HackIT is an annual cybersecurity conference that gathers the best technical researchers and top players in the cybersecurity industry to explore cutting-edge technologies together. In 2018, HackIT focused on the use of blockchain technology.
Join our community:
Website - https://hacken.live/hackit-slideshare
Twitter - https://hacken.live/twitter_hackit
Facebook - https://hacken.live/facebook_hackit
Instagram - https://hacken.live/instagram_hackit
Reddit - https://hacken.live/reddit
Telegram community - https://hacken.live/tg-hackit
Blockchain, cryptography and tokens — NYC Bar presentationPaperchain
Concise version of presentation delivered at the NYC Bar Association.
Overview of blockchains, how cryptography works on blockchains and the difference between cryptocurrencies and tokens.
Introduction to Ethereum Blockchain & Smart ContractThanh Nguyen
The Harvard Business Review (HBR) thinks that Blockchain Technology has to power to keep data safe for consumers and businesses alike; because Blockchain provides a secure and immutable ledger, HBR says it represents the key to taking back privacy of data.
“You can keep certified copies of identity documents, biometric test results, health data, or academic and training certificates online, available at all times, yet safe unless you give away your key. At a whole system level, the database is very secure.”
Indexing Decentralized Data with Ethereum, IPFS & The GraphStefan Adolf
The deck for a lightning talk I gave at Coding Berlin November 2019. Demonstrates how you can index data from a decentralized ledger (Ethereum) and filesystem (IPFS) using "The Graph" nodes and query them by using a pure GraphQL API.
How to Develop a Rarible Clone A Comprehensive Guide.pdfTurnkeytown
Developing a Rarible clone requires a comprehensive understanding of the essential features, technologies, and steps required to create a successful NFT marketplace.
1. Why are Customers adopting a Serverless-first Strategy?
AXA >> Rearchitecting with Serverless to accelerate innovation
2. Thinking Serverless >> from Business Problem to Serverless Solution ⚡
3. Getting started with Serverless for Developers
The fundamentals of AWS Cloud Security 🛠⛅️🚀Thanh Nguyen
1. Control your Cloud Infrastructure: AWS IAM
✍️ Identities that can make AWS calls
✍️ How to read and write IAM policy
2. Control your Data: AWS KMS
✍️ How AWS KMS integrates with AWS services
✍️ How to authorize access to AWS KMS keys
3. Control your Network: Amazon VPC ⛅️
✍️ How to get least-privilege connectivity
✍️ How to use your network as a security perimeter
https://datalake.aws.job4u.io/en/
You are a Data Analytics Team at Unicorn-Taxi Startup. You’ve been asked to help with the following tasks:
* Create a Dataset for Reporting and Visualization: Cleanse, Transform, Optimize for Reporting Queries
* Help solve a Machine Learning problem: Unicorn-Taxi’s Data Scientists need to understand Passenger tipping behavior
Enhanced Enterprise Intelligence with your personal AI Data Copilot.pdfGetInData
Recently we have observed the rise of open-source Large Language Models (LLMs) that are community-driven or developed by the AI market leaders, such as Meta (Llama3), Databricks (DBRX) and Snowflake (Arctic). On the other hand, there is a growth in interest in specialized, carefully fine-tuned yet relatively small models that can efficiently assist programmers in day-to-day tasks. Finally, Retrieval-Augmented Generation (RAG) architectures have gained a lot of traction as the preferred approach for LLMs context and prompt augmentation for building conversational SQL data copilots, code copilots and chatbots.
In this presentation, we will show how we built upon these three concepts a robust Data Copilot that can help to democratize access to company data assets and boost performance of everyone working with data platforms.
Why do we need yet another (open-source ) Copilot?
How can we build one?
Architecture and evaluation
Adjusting OpenMP PageRank : SHORT REPORT / NOTESSubhajit Sahu
For massive graphs that fit in RAM, but not in GPU memory, it is possible to take
advantage of a shared memory system with multiple CPUs, each with multiple cores, to
accelerate pagerank computation. If the NUMA architecture of the system is properly taken
into account with good vertex partitioning, the speedup can be significant. To take steps in
this direction, experiments are conducted to implement pagerank in OpenMP using two
different approaches, uniform and hybrid. The uniform approach runs all primitives required
for pagerank in OpenMP mode (with multiple threads). On the other hand, the hybrid
approach runs certain primitives in sequential mode (i.e., sumAt, multiply).
STATATHON: Unleashing the Power of Statistics in a 48-Hour Knowledge Extravag...sameer shah
"Join us for STATATHON, a dynamic 2-day event dedicated to exploring statistical knowledge and its real-world applications. From theory to practice, participants engage in intensive learning sessions, workshops, and challenges, fostering a deeper understanding of statistical methodologies and their significance in various fields."
06-04-2024 - NYC Tech Week - Discussion on Vector Databases, Unstructured Data and AI
Round table discussion of vector databases, unstructured data, ai, big data, real-time, robots and Milvus.
A lively discussion with NJ Gen AI Meetup Lead, Prasad and Procure.FYI's Co-Found
Techniques to optimize the pagerank algorithm usually fall in two categories. One is to try reducing the work per iteration, and the other is to try reducing the number of iterations. These goals are often at odds with one another. Skipping computation on vertices which have already converged has the potential to save iteration time. Skipping in-identical vertices, with the same in-links, helps reduce duplicate computations and thus could help reduce iteration time. Road networks often have chains which can be short-circuited before pagerank computation to improve performance. Final ranks of chain nodes can be easily calculated. This could reduce both the iteration time, and the number of iterations. If a graph has no dangling nodes, pagerank of each strongly connected component can be computed in topological order. This could help reduce the iteration time, no. of iterations, and also enable multi-iteration concurrency in pagerank computation. The combination of all of the above methods is the STICD algorithm. [sticd] For dynamic graphs, unchanged components whose ranks are unaffected can be skipped altogether.
Analysis insight about a Flyball dog competition team's performanceroli9797
Insight of my analysis about a Flyball dog competition team's last year performance. Find more: https://github.com/rolandnagy-ds/flyball_race_analysis/tree/main
Unleashing the Power of Data_ Choosing a Trusted Analytics Platform.pdfEnterprise Wired
In this guide, we'll explore the key considerations and features to look for when choosing a Trusted analytics platform that meets your organization's needs and delivers actionable intelligence you can trust.
Adjusting primitives for graph : SHORT REPORT / NOTESSubhajit Sahu
Graph algorithms, like PageRank Compressed Sparse Row (CSR) is an adjacency-list based graph representation that is
Multiply with different modes (map)
1. Performance of sequential execution based vs OpenMP based vector multiply.
2. Comparing various launch configs for CUDA based vector multiply.
Sum with different storage types (reduce)
1. Performance of vector element sum using float vs bfloat16 as the storage type.
Sum with different modes (reduce)
1. Performance of sequential execution based vs OpenMP based vector element sum.
2. Performance of memcpy vs in-place based CUDA based vector element sum.
3. Comparing various launch configs for CUDA based vector element sum (memcpy).
4. Comparing various launch configs for CUDA based vector element sum (in-place).
Sum with in-place strategies of CUDA mode (reduce)
1. Comparing various launch configs for CUDA based vector element sum (in-place).
6. https://nft.job4u.io
Seller
• List their NFTs
• Offers them in fixed
price sales or auctions
OpenSea
(NFT Marketplace)
Wallet
Creator
Artist
• Upload image,
define meta-data
• Mint a new NFT
NFTs
① NFT Minting
Market Operator
• Operate the marketplace
• Settles sales
• Platform Fees for every sale (2.5% - 5%)
Buyer
• Looking for new NFTs
• Buy with crypto/fiat
• Pay for royalties/licensing
Wallet
② Buy NFT
Cryptocurrency
Exchange
Cryptocurrency
transfer
③ Deposit cryptocurrency
③ NFT Ownership Transfer
7. https://nft.job4u.io
Wallets
Custodial Wallets Non-Custodial Wallets
No account recovery
Private key gone, tokens gone
Tokens owned by the user
Email/PW sign-up/ login (No wallet)
Account recovery
Tokens manged by them
Security risk for all assets on the platform
Metamask Portis
8. https://nft.job4u.io
Simply programs stored on a Blockchain that run when predetermined conditions are met
Smart Contract
pragma solidity ^0.8.0;
contract SimpleHouse {
uint storedHouse;
function set(uint x) {
storedHouse = x;
}
function get() constant returns (uint) {
return storedHouse;
}
}
Real Estate Contract
Registration
& Contract
Visit
& Contract
Real Estate Brokers & Courts
Borrower Home Owner
Reality
Smart Contract
Borrower Home Owner
P2P Network
Blockchain
=
9. https://nft.job4u.io
Non-Fungible Tokens
ERC-721
Smart Contract Impl.
157
158
0x722….042c
0x932….043e
token_id owner
159 0x212….013e
ERC-721 defines:
• Standard Interface for a NFT collection
Properties:
• Collection Name
• Collection Symbol
Functions:
• Get owner of tokens
• Get balance of an address
• Transfers of ownership
• Approvals (e.g. for exchanges)
• Links tokenId to the URI
…
…
…
…
10. https://nft.job4u.io
Non-Fungible Token
token_id: 157
User with Wallet
owns
0x7222fB737B4480A80d71452bBa5C9C799300424b
ERC-721 / ERC-1155 NFT
Smart Contract
stored on public Ethereum
157
Hashmask-157.jpeg
IPFS/S3
stored in a data store (IPFS / S3)
Meta-Data
links
11. https://nft.job4u.io
Backend
Block1
EVM
(Ethereum Virtual Machine)
Data
(Transaction List)
Developer
Smart Contract
pragma solidity ^0.8.0;
contract SimpleHouse {
uint storedHouse;
function set(uint x) {
storedHouse = x;
}
}
Block2
Smart
Contract
Block3
Data
(Transaction List)
Node
Node
Node
Node
Data
Distributed
Network
JSON RPC/HTTP
Borrower
Frontend
Mobile / Web App.
(javascript/HTML)
Web3.js
TheGraph.com
Wallet
(eg. Metamask)
I want to rent this
house for months
Smart
Contract
12. https://nft.job4u.io
User with Wallet
0x7222fB737B4480A80d714
52bBa5C9C799300424b
DATA STORAGE
BLOCKCHAIN
owns Digital Asset
links
16 YEARS
001.mp4
NFT
Media Data
Meta-Data
links
(Ethereum) (IPFS / Amazon S3)
16 YEARS
TokenID 157
Owner 0x722..…
s3://yyy..
Metadata_URI
NFT
Smart Contract
(ERC-721 / ERC-1155)
NFT
Token
157
NFT
Meta-Data
Name : AWS
s3://xxx….
File_URI
13. https://nft.job4u.io
By mid 2021, projects can reduce the environmental impact
by ”off-loading” transactions to layer 2 solutions
Scaling Ethereum: Two Approaches to Fix Things
ETH 2.0 Enlarge blockspace (Layer 1):
Modify the base protocol
L2 Approaches Fit more tx into existing blockspace (Layer 2): Move
stuff off-chain
Layer 1 Layer 2
15 tx/sec
100s tx/sec
to
1000 tx/sec
14. https://nft.job4u.io
Years of research by the community
Launch of phase 0 in 2020
Full scale launch expected in 2022
Goals:
• Scalability & Security
• Sustainability “Will cut the energy demand by 99%”
15. https://nft.job4u.io
Ethereum mainnet is too
expensive for day to day low
value transactions
Optimism/Arbitrum are still
in development
Polygon provides the right
balance between security
and cost
Security high
low
Tx
Cost
100$
0.1$
Ethereum
β
16. https://nft.job4u.io
BaaS Comparison
Name IBM AWS Kaleido Luniverse Klaytn
Network Hyperledger Fabric
Hyperledger Fabric
Ethereum (MainNet)
Ethereum (TestNet)
Hyperledger Fabric
Hyperledger Besu
Quarum, R3
Ethereum (MainNet)
Ethereum (TestNet)
Ethereum (Private)
Hyperledger Fabric
Hyperledger Besu
Bitcoin, Quarum
Ethereum (MainNet)
Ethereum (TestNet)
Ethereum (Private)
Luniverse
RPC Node
on Cloud Infra
O (1)
IBM
O (1)
AWS
O (3)
AWS, Azure, On-prem
O (5)
AWS, Azure, GCP,
NCP, On-prem
Smart Contract
IDE
Visual Studio Code IDE X
Remix
Truffle Suite
Remix
Atom
Truffle Suite
SaaS Service Food Trust
X
NFT, DID, Bridge,
Sidechain
Ethereum Development Stacks
17. https://nft.job4u.io
Challenge: Querying Smart Contracts for historic data is not a good idea
Option1: Run an Ethereum node in archive
mode ( 8TB)
Option2: Listen to events like mint and
transfers, and track the balances off-chain
• Needs to be robust (do not miss an event!)
• Needs to handle chain reorgs
Option3: Use “TheGraph” Project
• It tracks all the events & builds up index
• Provides graphQL API interfaces
• Powers all the popular crypto projects
18. https://nft.job4u.io
Amazon CloudFront
Amazon CloudFront
Amazon CloudFront
Amazon Cognito
Amazon
API Gateway
Amazon S3
Web Apps
Amazon S3
Web Apps
Amazon S3
NFT Assets
AWS Lambda
Create NFT
AWS Lambda
Transaction Signer
AWS KMS
Ethereum Private
Key(Admin)
Amazon DynamoDB AWS Fargate
AWS Lambda
Proxy
Smart Contract
Owner Wallet
Marketplace
Smart Contract
ERC-721
Smart Contract
Company
Wallet
Royalty Fee
Recipients Wallet
Creator Frontend
NFT Asset API NFT Storage
NFT API Blockchain Event Synchronizer
Amazon Managed Blockchain
Transaction Manager & Admin Wallet
Ethereum
Create, mint,
and list a new
NFT
Buy an NFT
Personal
wallet
Buyer Frontend
Buyer user
interface
NFT API
Blockchain
event
synchronizer
Ethereum
contracts
and wallets
Amazon
Managed
Blockchain
Transaction manager
and admin wallet
NFT
storage
Creator user
interface
NFT
assets
19. https://nft.job4u.io
Amazon
CloudFront
Amazon
CloudFront
Amazon CloudFront
Amazon Cognito
Amazon
API Gateway
Amazon S3
(web apps)
Amazon S3
(web apps)
Amazon S3
NFT Assets
AWS Lambda
Create NFT
AWS Lambda
Transaction Signer
AWS KMS
Ethereum Private
Key(Admin)
Amazon DynamoDB AWS Fargate
AWS Lambda
Proxy
Smart Contract
Owner Wallet
Marketplace
Smart Contract
ERC-721
Smart Contract
Company
Wallet
Royalty Fee
Recipients Wallet
Creator user interface
NFT Asset API NFT Storage
NFT API Blockchain Event Synchronizer
Amazon Managed Blockchain
Transaction Manager & Admin Wallet
Ethereum
Buyer user interface
NFT API
Blockchain
event
synchronizer
Ethereum Contracts
and Wallets
Amazon
Managed
Blockchain
NFT
storage
NFT
assets
Create, mint,
and list a new
NFT
Buy an NFT
Personal
wallet
NFT API
NFT
storage
NFT
assets
Blockchain
event
synchronizer
Ethereum
contracts
and wallets
Amazon
Managed
Blockchain
Transaction manager
and admin wallet
20. https://nft.job4u.io
Amazon
CloudFront
Amazon
CloudFront
Amazon
CloudFront
Amazon
Cognito
Amazon
API Gateway
Amazon S3
(web apps)
Amazon S3
(web apps)
Amazon S3
NFT Assets
AWS Lambda
Create NFT
AWS Lambda
Transaction Signer
AWS KMS
Ethereum Private
Key(Admin)
Amazon DynamoDB AWS Fargate
AWS Lambda
Proxy
Smart Contract
Owner Wallet
Marketplace
Smart Contract
ERC-721
Smart Contract
Company
Wallet
Royalty Fee
Recipients Wallet
Creator user interface
NFT assets NFT Storage
NFT API Blockchain Event Synchronizer
Amazon Managed Blockchain
Transaction Manager & Admin Wallet
Ethereum
Buyer user interface
Blockchain Event
Synchronizer
Ethereum Contracts
and Wallets
Amazon Managed Blockchain
Transaction Manager
and Admin Wallet
NFT Storage
Create, mint,
and list a new
NFT
Buy an NFT
Personal
wallet
NFT
storage
Blockchain
event
synchronizer
Ethereum
contracts
and wallets
Amazon
Managed
Blockchain
Transaction manager
and admin wallet
21. https://nft.job4u.io
Amazon
CloudFront
Amazon
CloudFront
Amazon
CloudFront
Amazon
Cognito
Amazon
API Gateway
Amazon S3
(web apps)
Amazon S3
(web apps)
Amazon S3
NFT assets
AWS Lambda
create NFT
AWS Lambda
Transaction Signer
AWS KMS
Ethereum Private
Key(Admin)
Amazon DynamoDB AWS Fargate
AWS Lambda
Proxy
Smart Contract
Owner Wallet
Marketplace
Smart Contract
ERC-721
Smart Contract
Company
Wallet
Royalty Fee
Recipients Wallet
Blockchain Event Synchronizer
Amazon Managed Blockchain
Transaction Manager & Admin Wallet
Ethereum
Blockchain Event
Synchronizer
Ethereum Contracts
and Wallets
Amazon Managed Blockchain
Transaction Manager
and Admin Wallet
Create, mint,
and list a new
NFT
Buy an NFT
Personal
wallet
Blockchain
event
synchronizer
Ethereum
contracts
and wallets
Amazon
Managed
Blockchain
Transaction manager
and admin wallet
Creator user interface
NFT assets
NFT API
Buyer user interface
NFT storage
22. https://nft.job4u.io
Amazon
CloudFront
Amazon
CloudFront
Amazon
CloudFront
Amazon
Cognito
Amazon
API Gateway
Amazon S3
(web apps)
Amazon S3
(web apps)
Amazon S3
NFT assets
AWS Lambda
create NFT
AWS Lambda
Transaction Signer
AWS KMS
Ethereum Private
Key(Admin)
Amazon
DynamoDB
AWS Fargate
AWS Lambda
Proxy
Smart Contract
Owner Wallet
Marketplace
Smart Contract
ERC-721
Smart Contract
Company
Wallet
Royalty Fee
Recipients Wallet
Blockchain event synchronizer
Amazon Managed Blockchain
Transaction Manager & Admin Wallet
Ethereum
Ethereum Contracts
and Wallets
Amazon Managed Blockchain
Transaction Manager
and Admin Wallet
Create, mint,
and list a new
NFT
Buy an NFT
Personal
wallet
Creator user interface
NFT assets
NFT API
Buyer user interface
NFT storage
Ethereum
contracts
and wallets
Amazon
Managed
Blockchain
Transaction manager
and admin wallet
23. https://nft.job4u.io
Amazon
CloudFront
Amazon
CloudFront
Amazon
CloudFront
Amazon
Cognito
Amazon
API Gateway
Amazon S3
(web apps)
Amazon S3
(web apps)
Amazon S3
NFT assets
AWS Lambda
create NFT
AWS Lambda
Transaction Signer
AWS KMS
Ethereum Private
Key(Admin)
Amazon
DynamoDB
AWS Fargate
AWS Lambda
proxy
Amazon Managed
Blockchain
Smart Contract
Owner Wallet
Marketplace
Smart Contract
ERC-721
Smart Contract
Company
Wallet
Royalty Fee
Recipients Wallet
Amazon Managed Blockchain
Transaction Manager & Admin Wallet
Ethereum
Ethereum Contracts
and Wallets
Transaction Manager
and Admin Wallet
Create, mint,
and list a new
NFT
Buy an NFT
Personal
wallet
Blockchain event synchronizer
Creator user interface
NFT assets
NFT API
Buyer user interface
NFT storage
Transaction manager
and admin wallet
Ethereum
contracts
and wallets
24. https://nft.job4u.io
Amazon
CloudFront
Amazon
CloudFront
Amazon
CloudFront
Amazon
Cognito
Amazon
API Gateway
Amazon S3
(web apps)
Amazon S3
(web apps)
Amazon S3
NFT assets
AWS Lambda
create NFT
AWS Lambda
transaction signer
AWS KMS Ethereum private
key (admin)
Amazon
DynamoDB
AWS Fargate
AWS Lambda
proxy
Smart Contract
Owner Wallet
Marketplace
Smart Contract
ERC-721
Smart Contract
Company
Wallet
Royalty Fee
Recipients Wallet
Transaction manager
and admin wallet
Ethereum
Ethereum Contracts
and Wallets
Create, mint,
and list a new
NFT
Buy an NFT
Personal
wallet
Amazon Managed Blockchain
Blockchain event synchronizer
Creator user interface
NFT assets
NFT API
Buyer user interface
NFT storage
Ethereum
contracts
and wallets
Amazon Managed
Blockchain
25. https://nft.job4u.io
Amazon
CloudFront
Amazon
CloudFront
Amazon
CloudFront
Amazon
Cognito
Amazon
API Gateway
Amazon S3
(web apps)
Amazon S3
(web apps)
Amazon S3
NFT assets
AWS Lambda
create NFT
Amazon
DynamoDB
AWS Fargate
AWS Lambda
proxy
Smart contract
owner wallet
Other smart
contracts
(marketplace)
ERC-721
smart contract
Company
wallet
Royalty fee
recipients
wallet
Ethereum
Create, mint,
and list a new
NFT
Buy an NFT
Personal
wallet
Transaction manager
and admin wallet
Amazon Managed Blockchain
Blockchain event synchronizer
Creator user interface
NFT assets
NFT API
Buyer user interface
NFT storage
AWS Lambda
transaction signer
AWS KMS Ethereum private
key (admin)
Amazon Managed
Blockchain
26. https://nft.job4u.io
Amazon
CloudFront
Amazon
CloudFront
Amazon
CloudFront
Amazon
Cognito
Amazon
API Gateway
Amazon S3
(web apps)
Amazon S3
(web apps)
Amazon S3
NFT assets
AWS Lambda
create NFT
Amazon
DynamoDB
AWS Fargate
AWS Lambda
proxy
Smart contract
owner wallet
Other smart
contracts
(marketplace)
ERC-721
smart contract
Company
wallet
Royalty fee
recipients
wallet
Ethereum
Create, mint,
and list a new
NFT
Buy an NFT
Personal
wallet
Transaction manager
and admin wallet
Amazon Managed Blockchain
Blockchain event synchronizer
Creator user interface
NFT assets
NFT API
Buyer user interface
NFT storage
AWS Lambda
transaction signer
AWS KMS Ethereum
private key (admin)
Amazon Managed
Blockchain
27. https://nft.job4u.io
Seller
Recruiter/BD/Agent
• List their NFTs
• Offers them in fixed
price sales or auctions
Resume4U
(NFT Marketplace)
Wallet
Creator
Job-Seeker
• Upload Resume - personal & professional,
experiences & achievements …
define meta-data
• Mint a new NFT
NFTs
① NFT Minting
Market Operator
Job4U Call-Center
• Operate the marketplace
• Settles sales
• Platform Fees for every sale (2.0% - 5%)
Buyer
Employer
• Looking for new NFTs
• Buy with crypto/fiat
• Pay for royalties/licensing
Wallet
② Buy NFT
Cryptocurrency
Exchange
cryptocurrency
transfer
③ Deposit cryptocurrency
③ NFT Ownership Transfer
We’ve seen an explosion of NFTs and different types of digital assets.
In sports, NBA TopShots launched a baseball card like product where you can own highlight moments of individual players.
In art work, Cryptopunks launched 10k pieces of art. Beeple sold many of his art pieces for significant amounts, including an all encompassing artwork for $69M.
Triple digits of bidders from the crypto world as well as modern art world
More 22mn people watched the auction live
In music, Kings of Leon sold an NFT only album (6500 copies), along with six golden tickets which give perks like lifetime front row seats to their shows, backstage passes etc.
BLAU sold 33 different NFTs for various experiences like being able to record a song with him.
There are marketplaces like OpenSea where people can resell and buy these
----
Everything what you see - is on Ethereum except “NBA topshot”
What about NFT market trends?
Axie Infinity P2E (Play to Earn) games are the most active.
As for the network, Ethereum ranks first, followed by Ronin and Solana.
In addition to the Axie Infinity game,
Community-friendly NFTs such as bored Ape yacht club and art blocks are active and popular.
2022_NFT Market Report Q1_final.pdf
The process of issuing and trading NFTs in the open market is as follows:
First, the creator creates an NFT and uploads it.
If the Buyer purchases it with cryptocurrency
Cryptocurrency is deposited to the creator, and
The buyer receives a certificate of ownership and stores this in his wallet.
Creator/Artist:
Apply + GetVerified
Create new NFTs (primary market)
Upload image, define meta-data
Unlockable content (e.g. image in high-resolution)
Royalty fee (10%)
Seller:
List NFT
Fixed price sales
Run an auctions (English/VN)
Buyer:
Explore/Search/Filter
Verify chain info
Check provenance of the item
Bid on auctions (can be canceld)
Buy with crypto/fiat
Fees for every sale:
Platform fee (2.5% - 5%)
Artist/Jobseeker:
Apply + GetVerified
Create new NFTs (primary market)
Upload image, define meta-data
Unlockable content (e.g. iamge in high resolution)
Royalty fee (10%)
Seller:
List NFT
Fixed price sales
Run an auctions (English/VN)
Buyer:
Explore/Search/Filter
Verify chain info
Check provenance of the item
Bid on auctions (can be canceld)
Buy with crypto/fiat
Fees for every sale:
Platform fee (2.5% - 5%)
* To use cryptocurrency, you need a different type of wallet than the one you always use.
* Among them, the most familiar one is probably the exchange wallet (Binance, CoinBase).
The exchange wallet does not manage the key by the user
Users can access with their familiar email and password.
Even if you lose your password, there is no need to worry because the exchange will recover it. However, if the exchange is closed or hacked, users cannot do anything.
* In some cases, the user directly manages the key.
You may know 'MetaMask'. Users do not need any personal information, they only need a password to connect to the wallet.
If you lose your password or key, the tokens in your wallet are gone.
This key management is absolutely up to you!.
To rent a house in reality,
Through a real estate agent
You must write a lease agreement.
But in blockchain
With smart contract, “non-face-to-face” and “automatic contract” is possible.
If the contract condition is implemented as programming, it will be executed when this condition is satisfied.
This condition means . . whether a specific parameter comes in, whether the parameter value is greater than a certain value etc.
What is a standard:
Royalties
Which NFT standard makes most sense?
Pros of ERC 721:
Best ecosystem support
Clear provenance of each NFT
Pros of ERC 1155:
More generic: Allows also fungible tokens
Less transactions, more gas-efficient for certain operations
Questions:
Do you need fungible tokens for your use case?
Challenge: What is the best standard if you need fungibility for the shares, but would like to attach a media asset as well.
NFT properties:
Ownership
Transferable
Fraud-proof
Invisible
Provably Scarce
Unique
Problem: which standard
Problem2: security tokens
- A non-fungible token (NFT) is a unit of data on a blockchain, where each NFT can represent a unique digital item, and thus they are not interchangeable. - NFTs can represent digital files such as art, audio, videos, items in video games.- While the digital files themselves are infinitely reproducible, the NFTs representing them are tracked on their underlying blockchains and provide buyers with proof of ownership.
A Fungible Token represents ownership of an on-chain asset
One of the most frequently asked questions by customers is which NFT standard to use.
ERC20 is not NFT standard but FT standard, and there are two NFT standards, ERC-721 and 1155.
In ERC20, balance is important, in ERC-721, owner is important information.
But in the case of game items or if there are many NFT collections, the cost would be huge if you trade them one by one.
ERC-1155 adds Balance so that multiple NFTs can be traded at once.
For example, instead of selling each sword one by one, you can sell 3 or 2 at a time.
The working process of the actual smart contract is as follows.
Data is stored in Blockchain in each node, not in a database.
As Java has JVM, for Ethereum, there is EVM. In order for a smart contract to work, there must be a VM
When a developer develops a smart contract and deploys it to the network,
The Smart Contract code is stored in a block. Smart Contract code is exactly the same as other transaction data.
You can call the Smart Contract stored in the blockchain / using the web application, and the data created in this application is also stored as a new block.
Making NFTs is called 'minting'.
Let's say that S3 “16th anniversary” NFT is issued.
Upload this file to distributed storage IPFS or Amazon S3.
If the file is uploaded successfully, the uploaded location will appear, right?and then store meta-information such as this link and the name of the person / who issued it.
So, until now, we have saved the actual file and metadata to S3. Metadata can be stored in the database.
* The smart contract is distributed in advance on the blockchain.
In the case of Ethereum, smart contract is created and distributed in advance
* When an NFT issuance request comes, this contract creates a token with a unique ID
This token records the location of metadata and the owner' address.
* If you want to check the current ownership of this file, you can check this token.
* If you want to look at the original file, you can see the actual file by following the metadata link and file link.
By mid 2021, projects can reduce the environmental impact by ”off-loading” transactions to layer 2 solutions
Scaling Ethereum: Two Approaches to Fix Things
Enlarge blockspace (Layer 1): Modify the base protocol ETH 2.0
Fit more tx into existing blockspace (Layer 2): Move stuff off-chain L2 Approaches
Source: https://spectrum.ieee.org/computing/networks/ethereum-plans-to-cut-its-absurd-energy-consumption-by-99-percent
Scalability: Sharding, in combination with layer 2 rollups should allow to 100,000 tx / second
In Proof Of Work, miners invest their resources – mainly electricity – to validate transactions and secure the network. This model requires massive amounts of energy to work properly and protect the network from “51% attacks”.
In Proof of Stake, users who want to secure the network, stake their ETH and become validators. Each validator is incentivised to validate transactions by receiving, similarly to miners in proof-of-work, both the block reward and the transaction fees.
To discourage validators from trying to game the system and validate fraudulent transactions, the Proof of Stake system implements a mechanism called “slashing” where validators lose part of their staked ETH if they decide to act dishonestly.
Phase 0: Means staking Eth. Right now we have 3.6mn ETH staked $7bn
Layer2 discussion Polygon
Side-chain that periodically syncs to main net: Plasma & Polygon
🌟 useful for NFT applications
🌟 constant data on-chain per tx (1 merkle root per period) = O(1)
☄️ tx not instant (have to wait for interval to end)
☄️ not general purpose (can’t simulate full EVM)
Based on: 10gwei, ETH price: 2100$
Action
Gas costs
Transaction costs
Mint a new NFT
150k
3.50$
Transfer NFT
80k
2$
Deploy a ERC721 smart contract
3.7mn
85$
TokenDataService (based on theGraph)
NFT Ownership have a limited interval or sales NFT to everyone?
The process of issuing and trading NFTs in the open market is as follows:
First, the creator creates an NFT and uploads it.
If the Buyer purchases it with cryptocurrency
Cryptocurrency is deposited to the creator, and
The buyer receives a certificate of ownership and stores this in his wallet.
For individuals or Job Seekers, they simply need to create a profile and Resume NFT in the marketplace.
Verify Resume: Digital Identity
Marketplace fee: 2.5%