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블록체인 개발자가 은행을 대체할 수 있을까? Why are "Smart Contracts" such a big deal?
적어도 스마트 컨트랙 (Smart Contract) 정도는 알아야 왜 이더리움 등등이 떡상했는지 알 수 있음!
Timestamps
- 00:00 Intro
- 01:11 비트코인이 지루한 이유
- 01:20 스마트 컨트랙 | Smart Contract
- 02:38 예시 1. 은행
- 03:27 예시 2. 에어비앤비
- 04:30 예시 3. 테슬라
- 05:04 단점 | Limitations
- 06:01 오라클 | Oracle
- 07:01 다음 영상 예고 | Next Video
#blockchain
What is GEEK
Buddha Community
1592205156
Top Smart Contracts Blockchain Development Companies Reviews 2020 – TopDevelopers.co
An extensively researched list of top blockchain and smart contracts developers with ratings & reviews to help find the best smart contracts blockchain Development Companies around the world.
The Smart contract companies listed here on TopDevelopers are top-rated among the Blockchain development agencies experienced in developing Smart Contract projects. With the capability to mobilize enterprises, these Smart Contract development service providers can help you achieve your industrial needs with the technology trends.
#top smart contracts blockchain development companies #smart contract development service providers #best smart contract development companies #top-rated blockchain development agencies #top smart contracts developers
1616333719
블록체인 개발자가 은행을 대체할 수 있을까? Why are "Smart Contracts" such a big deal?
적어도 스마트 컨트랙 (Smart Contract) 정도는 알아야 왜 이더리움 등등이 떡상했는지 알 수 있음!
Timestamps
- 00:00 Intro
- 01:11 비트코인이 지루한 이유
- 01:20 스마트 컨트랙 | Smart Contract
- 02:38 예시 1. 은행
- 03:27 예시 2. 에어비앤비
- 04:30 예시 3. 테슬라
- 05:04 단점 | Limitations
- 06:01 오라클 | Oracle
- 07:01 다음 영상 예고 | Next Video
#blockchain
1609402266
A smart contract application is an automated software program
A smart contract application requires a high level of technical expertise, good knowledge about the functioning of different blockchain networks, complete professionalism, and an understanding of various business use cases.
Smart contracts are beneficial as they are highly reliable, tamper-resistant, fully immutable, help in the decentralized execution of business operations, possess a self-auditing mechanism, ensure that there is no chance of a single point of failure, and have a shared public ledger.
The typical process followed is getting to know the business requirements, preparing the technical specifications, ensuring full-fledged GDPR compliance, preparing a timeline for Alpha and Beta release, carrying out rigorous testing to ensure that the smart contract application is bug-free and secure for daily usage, deploying it on the operational network, and issuing the necessary software updates frequently.
Hire an experienced team who will ensure top-notch integrity, hassle-free management of the project, and flexible engagement models when creating your customized smart contract application.
#smart contract application #smart #smart contracts
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Smart Contracts Blockchain
We understand that Smart contracts are lines of code that are professionally stored on a blockchain and automatically execute when predetermined terms and conditions are mutually met. At basic level, they are programs that run as they have been set up to run by the people who developed them.
It is also noted that a smart contract is a systematic protocol that is intended to digitally verify, facilitate or enforce the performance of a contract. Smart contracts permit the exchange of credible transactions without the need for a third party member. Moreover block chain exists as a perfect example of a Smart contract owing to its decentralization between all allowed parties which allows transaction without the need to pay any intermediaries.
More importantly the smart contracts permit you to exchange monetary funds, shares or property without any conflict by avoiding the services of an intermediary. A good example to Smart contracts is a Vending machine. Generally you would go to a notary or a lawyer to get your documents in place. You can now imagine that you go to a vending machine and drop a Bitcoin in to it and it gives you the required document straight away.
It is discussed that a Smart contract also defines the rules and regulations that a traditional agreement does and also automatically enforces those penalties. When you take uses of Smart contract some people think that using Smart contract is not a viable way owing to security risks.
But the Smart contracts would nullify all those concerns by providing you with the best and more secure systems than before. A Smart contract acts as a backbone of any ICO software. They adeptly enable minting of ICO tokens, their distribution, future earnings, resale and any inflation mechanics you select.
Which is the best Cryptocurrency exchange software development company?
Without any doubt the Hashogen Technologies is a popular motivated cryptocurrency exchange software development company with a team of skilful resources. Their key motto of us is to offer technology-driven services at an affordable cost without compromising the quality. One can also witness quality Bitcoin Exchange Script, Cryptocurrency Exchange script and Cryptocurrency exchange software from Hashogen Technologies.
Demo links: http://exchange.consummo.com/
Click here Get Knew About Hashogen >> https://www.hashogen.com
Contact Us Whatsapp: +91 9003428723
Telegram: https://t.me/hashogen
Skype: skype:live:.cid.8410342345cd3d09?chat
Email: hello@hashogen.com
#smart contracts blockchain #smart contracts ethereum #blockchain #cryptocurrency #bitcoin
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Using the Michelson Programming Language to Write Smart Contracts on Tezos
Learn how to use the Michelson programming language and write smart contracts on Tezos
(Please check first Part 1 and Part 2)
In this new installment of our series about Michelson language, we are going to crank it up a notch!
In the last parts, we were having a quite simple stack and doing some basic manipulations, adding elements, removing them, duplicating them, etc. However, one of the powers of smart contracts is access-control: you can request your smart contract to verify if the person sending a request is allowed to modify the storage. If they are allowed, they can continue performing their operation. If they are not, the execution of the smart contract stops and all subsequent code is ignored.
Unlike Ethereum smart contracts, smart contracts on Tezos do not modify the storage at any point in the execution of the transaction. The new storage is returned at the end of the execution if everything went well. This makes smart contracts on Tezos extremely secure: Michelson will make sure that everything is executed as it should before modifying the storage. Solidity will modify the storage and hope there will be no problem down the road 😊
In this article, we are going to write a smart contract that verifies that the sender of the transaction is allowed to modify the storage. If they are, we are going to concatenate the string they provide with the string in the storage. If they are not, the contract will just stop executing and return an error.
The Michelson code
The whole code of the smart contract is available in the Jupyter notebook binder. After navigating to the page and waiting a minute for the Michelson kernel to load, select _MichelsonTutorial-Demo4.ipynb _to see the code. As for the last lesson, you can see the inline code or run the code step-by-step.
Let’s have a look at the inline code:
It is amazing how much power such a small piece of code packs 😅
The storage looks different this time: it contains a pair with an address on the left side and a string on the right side. We are going to use the address in the storage to compare it to the sender’s address and give/refuse access.
You probably recognized a few opcodes that were introduced in the previous lessons: DUP, CAR, PAIR, NIL, etc. There are also new instructions: DIG, SENDER, IFCMPEQ, FAIL, etc. No worries, we are about to see what they do.
As usual, you are free to play with the step-by-step code in the Jupyter notebook so you can get a better understanding of what the code does and how it modifies the stack at each step.
Step-by-step execution
Now let’s go line by line and see what the code does!
First, a pair containing the provided parameter and the storage is pushed onto the stack:
DUP
We want to duplicate the first element of the storage. As you are probably beginning to understand, this is a normal step to separate the parameter from the storage when you need both in two different elements:
CAR
Remember CAR? It takes the pair at the top of the stack and extracts its left value:
DIP { CDR ; DUP ; CDR }
This one is a very interesting and useful instruction! You can see that the instruction is made of two parts: the DIP part and the part between curly braces.
The DIP instruction “protects” the element of the stack that it refers to. If there is no number after DIP, it will protect the first element on the top of the stack. You can also use DIP 2 or DIP 10 according to the number of elements. The DIP instruction is followed by some code between curly braces that will affect the element below the element protected by the instruction. As such, if you write DIP 0 { code }, it would be as if you wrote code and if you write DIP 1 { code }, as if you wrote DIP { code }:
#tezos #blockchain #michelson #programming #smart-contracts #smart-contracts-top-story #blockchain-top-story #hackernoon-top-story