Blockchain Software Engineering Daily 공개
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Coinbase is a very popular and well trusted cryptocurrency platform for buying and selling digital assets like Bitcoin, Ethereum, and many more. With Coinbase you can manage your portfolio of cryptocurrencies in 1 place like you would for other investments. There are added features like scheduling recurring purchases of assets, time-delayed withdra…
 
Platforms like Ethereum have billions of dollars of market cap and large developer communities. However, it is still a challenge to build widely adopted DApps on it because of current limitations. Blockchain Proof of Work transactions are typically slow, and Proof of Stake transactions trade off decentralization to achieve high throughput. Transact…
 
The company Skynet Labs provides an open protocol for hosting data and web applications on the decentralized web. Skynet allows for decentralized, censorship-resistant, highly redundant storage and applications that are available around the globe. Developers don’t pay for their application’s storage, can launch apps with access to a user’s data rig…
 
A liquid market enables individuals or groups to quickly buy and sell assets. Decentralized platforms can struggle to execute trades when their platform does not have much liquidity for a specific token. Newer tokens or tokens with limited supply are most often the least liquid because there might be an imbalance of buyers and sellers. You can’t se…
 
Non-fungible tokens are proofs of authenticity that are stored on a blockchain. Unlike fungible tokens, such as cryptocurrencies which are interchangeable, non-fungible tokens aren’t inherently equivalent to any other token. Because they are unique, they can be used to represent any unique asset. Their presence on a blockchain enables an NFT owner …
 
Volatility is the degree of fluctuation of something’s price. Highly volatile assets may see rapid and large price changes, while less volatile assets will maintain a steady price. This concept is important in decentralized finance because cryptocurrencies tend to be volatile assets. The company Synthetix provides assets called Synths that provide …
 
A decentralized exchange, usually referred to as a DEX, is a platform for exchanging cryptocurrencies. Depending on trading volume for different coins, some DEXs are more liquid than others. On the one hand you can freely swap unlisted tokens and maintain full control over your private keys and wallet information. On the other hand, without the rig…
 
Decentralized applications, termed “dApps,” are applications that feel like normal apps but are actually deployed (mostly) on the Ethereum blockchain. This means dApps can’t be taken down, can’t be censored or blocked, typically use Ethereum accounts as identity, and would only experience downtime if Ethereum itself went down. There are a lot of th…
 
A ‘token’ can represent almost anything in Ethereum, according to Ethereum.org: Lottery tickets, points in an online platform, fiat currency, and much more. These tokens must follow a standard called ECR-20 to have the same type and value of any other token, and behave just like the ETH. The platform Opyn lets users buy and trade decentralized fina…
 
In decentralized finance (DeFi) a liquidity pool is a collection of cryptocurrency funds created from the deposits of many users and usually multiple different currencies. There are 2 main types of pools: custodial and non-custodial. Custodial pools are controlled by a third party manager which contains information like the private keys and the fun…
 
A smart contract contains the “terms” of a blockchain transaction between a buyer and a seller as well as the capabilities to execute those terms. In order for smart contracts to include outside data from the world, such as stock market data, weather, sports data, etc…, the contract needs a third party service called an oracle. The industry standar…
 
Cryptocurrencies like Bitcoin and Dogecoin are electronic currencies with a complete transaction history stored on a blockchain. A cryptocurrency blockchain is a linear record of all the transactions between users for a given currency. This record is public and distributed across thousands of computers, which makes falsifying a transaction nearly i…
 
Prediction Markets provide an exchange for trading based on the outcome of events. Most prediction markets are centralized- they operate like a casino, where betting takes place under the supervision of one central governing organization. This makes the market less efficient than it otherwise might be: the central organization is a business, and it…
 
Blockchain technology has a wide variety of potential applications. Fields such as finance, supply chain management, and even voting have seen innovations driven by the development of distributed applications built on blockchains, called DApps. However, developing a DApp on a blockchain often requires low-level knowledge about cryptographic protoco…
 
Cryptocurrencies today serve two purposes: store of value and speculation. The application infrastructure that has been built around cryptocurrency is mostly to support these use cases. At some point in the future, perhaps cryptocurrencies can be used as a global medium of exchange that is accepted at the grocery store. Perhaps we will use the bloc…
 
If the Internet was reimagined with the software and hardware infrastructure we have today, what would it look like? That is the question that DFINITY is working on answering. DFINITY’s goal is to build a decentralized, secure Internet computer. DFINITY takes concepts from the cryptocurrency world, but it is focused on computation, not financial pr…
 
Andreas M. Antonopoulos is the author of several books about cryptocurrency engineering, including Mastering Bitcoin and Mastering Ethereum. In these books, Andreas lays out the systems of economics and computer science that underpin the two most mature decentralized monetary systems. When Andreas originally discovered the Bitcoin whitepaper, he ha…
 
Upcoming events: A Conversation with Haseeb Qureshi at Cloudflare on April 3, 2019 FindCollabs Hackathon at App Academy on April 6, 2019 A currency can fulfill numerous financial use cases. One use case is store of value: currency holders can reliably expect their currency to maintain some value, though that value may fluctuate over time. Another u…
 
Malware is malicious software that makes money for the creator of that software. Malware can appear onto a user’s computer if that user visits a malicious website or installs malicious software by accident. There are many types of malware. Spyware sits on your machine and logs your data in order to sell it. Ransomware can lock your computer and dem…
 
Cryptocurrencies enable a large number of applications. Trustless reputation systems, decentralized identity tools, micropayments, non-fungible Internet items, borderless currencies, just to name a few. But cryptocurrencies have not yet impacted daily life, for most of us. Why is that? One reason is that it is still very hard for developers to buil…
 
Ethereum allows developers to run decentralized applications. But the tooling for building and managing those decentralized applications is immature. Experienced software engineers have difficulty getting started with writing Ethereum applications because the stack of tools is so unfamiliar and different than traditional software tools. Whether or …
 
The Bitcoin main chain is a large distributed ledger of transactions. Bitcoin is useful for maintaining a trusted record of payments, but is not practical for small day-to-day payments. Bitcoin payment channels allow users to issue small payments to each other without paying the high transaction cost and latency of going through the main chain. Whe…
 
Parity is a company that builds blockchain infrastructure. Parity has built several open source projects and works with enterprises to put blockchain technology in production. Gavin Wood is the founder of Parity, and he joins the show to talk about the state of blockchain technology and what his company is currently focused on. Four years ago, Gavi…
 
Cryptocurrencies are not very usable today. The main use cases for cryptocurrencies today are store of value (somewhat like gold) and speculation. One reason that the use cases are so narrow is the problem of scalability. Cryptocurrencies have several scalability bottlenecks. Think about the Internet in 1994. The consumer sitting at home with a dia…
 
Cryptocurrency security is a concern to anyone who has a significant amount of money in the form of Bitcoin, Ethereum, or other crypto assets. Most Bitcoin is held in either a Bitcoin wallet or a Bitcoin bank. Your Bitcoin holdings are recorded on a public ledger. You access these holdings by authenticating with your private key. A Bitcoin wallet c…
 
A token is a unit of virtual currency. Most tokens are built on a blockchain-based cryptocurrency platform, such as Ethereum. Building on top of a platform like Ethereum allows these tokens to form their own financial ecosystem while leveraging the scale of an existing currency. Tokens became highly popular in early 2018, with the boom in ICOs–init…
 
Big blocks or small blocks: this is the fundamental question of Bitcoin scalability. The argument for big blocks is also known as “on-chain scalability.” Under this strategy, each block in the append-only chain of Bitcoin transaction blocks would grow in size to be able to support lower transaction fees and higher on-chain throughput. A set of Bitc…
 
Cryptocurrency infrastructure is a new form of software. Thousands of developers are submitting transactions to Bitcoin and Ethereum, and this transaction volume tests the scalability of current blockchain implementations. The bottlenecks in scalability lead to slow transaction times and high fees. Over the last twenty years, engineers have learned…
 
Podcasting about cryptocurrencies is a strange occupation. You get emails all the time from companies doing a token sale that you would never want to be affiliated with. You get angry tweets from anonymous Twitter accounts that are on one side of the Bitcoin scaling debate. You get to interview extreme personalities, and the technical discussions c…
 
Bitcoin and Bitcoin Cash are two cryptocurrencies with similar properties. But the supporters of each of these Bitcoin versions have strongly divergent opinions on the direction of the Bitcoin project. At the center of this debate is the subject of block size. Bitcoin’s block size determines how many transactions fit into each block that is mined. …
 
Let’s Talk Bitcoin is one of the most popular podcasts about cryptocurrencies. Adam B. Levine started it after three other podcasts he started did not get the traction he had hoped for. Adam parlayed the success of Let’s Talk Bitcoin into a network of podcasts–the Let’s Talk Bitcoin Network–which also includes one of my favorite shows, Epicenter. A…
 
The Interplanetary File System (IPFS) is a decentralized global, peer-to-peer file system. IPFS combines ideas from BitTorrent, Git, and Bitcoin, creating a new way to store and access objects across the Internet. When you access an object on almost any website, you are accessing the object via a location address—a URL. The URL tells you where to f…
 
The Ethereum community started as a small group of dedicated engineers. It has ballooned to thousands of engineers, entrepreneurs and investors, all of whom have a stake in the direction of Ethereum. Ethereum is an open source project, and the direction of a popular open source project can get complex. Ethereum is figuring out how to govern itself.…
 
The pubsub pattern allows a developer to create channels, which messages can be written to and read from. Pubsub messaging is useful for multicast messaging–when you want to publish messages from a producer, and have multiple consumers who are subscribed to the publisher receive those messages. Almost any application that reaches a high level of co…
 
Most technology companies rely on open source software projects. But open source software projects are often maintained by a group of people that is not affiliated with any particular company. When an open source project develops too much technical debt, it can become a tragedy of the commons. Who is responsible for maintaining these open source pr…
 
Zcash is a payment and consensus system that allows users to transfer money to each other with strong guarantees of privacy. Zcash implements the same core features of Bitcoin, with the added functionality of shielded payments. Shielded payments are private, and they are enabled by a novel cryptographic technique called zk-SNARKS: zero knowledge su…
 
“The Federal Reserve System is fraudulent. Whatever its stated purpose, its effective purpose is to create a mechanism of deficit spending by politicians, through the insidious invisible taxation of monetary debasement (aka inflation).” These are the words of Erik Voorhees, the CEO of crypto financial exchange ShapeShift. Long before he started Sha…
 
We sign many different types of contracts throughout our lives. We sign a mortgage to get a loan for a house. When we go to the hospital, we sign a piece of paper that defines how our medical data can be shared between organizations. These pieces of paper represent our opting into an agreement that will be mediated and enforced by computer interact…
 
Ethereum is a system for running decentralized smart contracts. In the current implementation of Ethereum, every smart contract gets deployed to every full node. Whenever a user wants to call a smart contract, that smart contract gets executed on each full node–across the entire network. The current model for smart contract execution needs to be ma…
 
Soumya Basu is a PhD student at Cornell, where he studies distributed systems problems associated with cryptocurrencies. Soumya is advised by Emin Gun Sirer, a Cornell professor who previously appeared on the show to discuss smart contract security. Soumya joins the show today to talk about a variety of issues in the cryptocurrency space. We first …
 
Consensus protocols are used to allow computers to work together. A consensus protocol lets different servers agree on the state of a system. For decades, these protocols have been used to establish consensus among database nodes, application servers, and other infrastructure that runs within an enterprise. More recently, new consensus protocols ha…
 
The DAO was a system of smart contracts on the Ethereum blockchain that investors put millions of dollars into. Back in May 2016, it was the largest crowdfunding event in history, and we discussed it in detail in a previous episode with Matt Leising. The DAO was hacked due to a security vulnerability, and this event led to a hard fork of Ethereum. …
 
Data streams about the weather can be used to predict how soybean futures are going to change in price. Satellite data streams can take pictures of the number of cars on the road, and judge how traffic patterns are changing. Search engines can aggregate data from different queries and determine what people are most interested in. Data streams defin…
 
To use a web application, you probably open a web browser or a mobile app. To access an Ethereum application, many people use an Ethereum browser. In previous episodes, we explored Metamask and Mist, which are Ethereum browsers for the desktop. In today’s episode, we explore Status, a mobile Ethereum browser. Status founders Jarrad Hope and Oskar T…
 
Anthony Diiorio was involved with Ethereum since the earliest days. He was one of the first people to see the Ethereum ideas presented by Vitalik Buterin, and he invested deeply in Ethereum–both financially and by helping to establish the early Ethereum community. Anthony started Decentral in 2014, which is a hub for his projects in the cryptocurre…
 
A financial exchange is an operationally intensive business. You have customers making a high volume of transactions, your service has to be low latency and highly available, and you are dealing with a lot of money. A cryptocurrency exchange has all of the complexity of a typical financial exchange–and then some additional complexity. ShapeShift is…
 
Cryptocurrency speculation has pulled in a large population of people who do not know what they are investing in. If you hear about an investment of $1000 turning into $1M, it’s tempting to get sucked in yourself. For most of these everyday people, the game is completely rigged. A large percentage of market activity is driven by “pump and dumps.” A…
 
In the finance industry, many people have a computer on their desk called a Bloomberg terminal. A Bloomberg terminal contains news, stock prices, communication tools, and other features that make it worth a high subscription price. And people in finance can afford to pay that high subscription because their decisions can cause a gain or loss of tho…
 
Most applications today run on a cloud provider like AWS. They are built with a framework like Ruby on Rails. They use a set of APIs like Stripe and Twilio for middleware services. This is the era of “web 2.0.” With decentralized systems, we are starting to get a feel for what “web 3.0” might feel like. The futuristic idea of “web 3.0” works off of…
 
Decentralized applications can be built on the Ethereum blockchain. Just as the Bitcoin blockchain is a distributed, append-only ledger of financial transaction history, Ethereum is a distributed, append-only ledger of computational transaction history. New kinds of applications can be built on the Ethereum blockchain—and just like every new techno…
 
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