bitcoin_in_a_nutshell | Книга о том , как действительно работает Bitcoin | Blockchain library
kandi X-RAY | bitcoin_in_a_nutshell Summary
kandi X-RAY | bitcoin_in_a_nutshell Summary
Буквально пару лет назад было немало людей, считавших Bitcoin либо игрушкой для гиков, либо в лучшем случае инструментом для покупки наркотиков, а кое-где его даже хотели запретить. Тем не менее сегодня со всех сторон слышно, что эта технология совсем скоро изменит мир, блокчейн стартапы появляются как грибы после дождя, а криптовалюты, по-моему, уже никто не считает. Удивительно, но при этом литературы, описывающей принципы работы Bitcoin, до сих пор очень мало, а та что есть, как правило, не несет никакой ценной информации. Поэтому я написал небольшую книгу для тех, кто хочет понять, как действительно работает Bitcoin. В ней я постарался коснуться всех основных моментов и по возможности объяснил их максимально доступным языком. Хотя книга рассчитана все-таки на людей, близких к IT сфере, благо примеров кода, специфической терминологии и несмешных шуток хватает. "You can't stop things like Bitcoin. It will be everywhere and the world will have to readjust. World governments will have to readjust" - John McAfee, Founder of McAfee.
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Top functions reviewed by kandi - BETA
- Generate a coinbase message
- Create a transaction message
- Generate a version message .
- Hash a list of hashes .
- Get the data message .
- Compute the hash of two strings .
- Make a message based on command and payload .
- Compute the hash of a txn .
bitcoin_in_a_nutshell Key Features
bitcoin_in_a_nutshell Examples and Code Snippets
Community Discussions
Trending Discussions on Blockchain
QUESTION
I am new to blockchain app development, I saw a project where ganache accounts are imported into Metamask, then web3.js is used to access and print those accounts and balances on Frontend (user interface).
If web3.js can directly access ganache blockchain accounts and balances, why do we need Metamask in between?
...ANSWER
Answered 2022-Feb-08 at 09:11If web3.js can directly acccess ganache blockchain accounts and balances, why we need metamask in between?
In this case, you don't need MetaMask to sign the transaction, as the node (Ganache) holds your private key.
But in a public environment (testnets and mainnet), the node doesn't hold your private key, so you'd need to sign the transaction using MetaMask (or any other tool that holds the private key).
QUESTION
I tried https://docs.opensea.io/reference opensea.io docs to fetch data. However, I think there are 2 APIs.
...ANSWER
Answered 2021-Aug-04 at 15:03The assets
endpoint (docs) has the asset_contract_address
filter that allows you to filter by a contract address. Which will effectively allow you to paginate through all NFTs of the contract (that Opensea knows of).
Example:
QUESTION
I want to publish files on ipfs but it's showing me an error.
Here is my code...
...ANSWER
Answered 2021-Nov-11 at 04:27I am not familiar with ipfs but i checked the official docs and they have done the first line like this:
QUESTION
I have been trying to interact with a contract on the AVAX chain using web3js and it keeps throwing the error, "TypeError: Cannot read properties of undefined (reading 'send')". I cannot figure out why this is happening, as it should be a valid statement. If anyone can help that would be awesome.
...ANSWER
Answered 2022-Mar-19 at 17:10The ABI needs to contain just the function and event definitions that are stored in your result
property. Without the wrapper object containing status
and other properties.
So in your case
QUESTION
I've been using the testnet lately and I encounter issues: they reset it very often and the service is down for multiple hours and sometimes have bugs.
Should I use the devnet? From what I've understood it's more stable and they reset it less often?
I have a backend in js that uses the elrond-sdk-erdjs and I'm confused because there is no function that initializes the https://devnet-gateway.elrond.com only the testnet. Is there a reason?
...ANSWER
Answered 2021-Aug-24 at 12:56The testnet is pretty volatile and it is reset very often (maybe weekly), without any warnings. Elrond recommends developers to use the devnet, it is reset maybe once every 3-4 months, so it's more stable.
You can get the provider like this:
QUESTION
Hey guys I am trying to deploy my project on the rinkeby chain using infura, but I am getting a ValueError Here is my trackback:
...ANSWER
Answered 2021-Nov-28 at 10:14it appears your env variables are not set correctly, and it looks like in this case it's your WEB3_INFURA_PROJECT_ID.
You can fix it by setting the variable in your .env file and adding dotenv: .env to your brownie-config.yaml.
brownie-config.yaml:
dotenv: .env .env:
export WEB3_INFURA_PROJECT_ID=YOUR_PROJECT_ID_HERE Remember to save these files.
Additionally, you should be on at least brownie version v1.14.6. You can find out what version you're on with:
brownie --version
QUESTION
I am very new to blockchain programming and programming in general. I want to generate my SOL address using the mnemonic seed phrase with the derivation path "m/44'/501'/0'/0". I can't find a proper BIP44 module for python where you can specify the derivation path.
...ANSWER
Answered 2022-Feb-23 at 00:41After a long search through the internet, I have finally found a way of solving my problem that I want to share with you.
QUESTION
ANSWER
Answered 2021-Oct-18 at 02:20I had the same issue but then I installed with npm and it worked
QUESTION
enter image description hereI've installed latest version of visual studio with desktop development c++ workload but still they are asking for it when i try to install truffle. I entered command :npm install -g truffle and lot of messages appear after 2 to 3 minutes of some kind of installation process. they are asking for Latest version of Visual Studio with "Desktop development with c++ workload" whereas i just installed my Visual studio with the same requirements. node.js and ganache are already installed. Is there any other way to install truffle?
...ANSWER
Answered 2022-Feb-17 at 16:59If you are installing it using npm package manager. Downgrade your npm to 7.24.2 it worked for me I hope it will also work for you. Use the following command to downgrade npm
QUESTION
I'm trying to swap tokens on uniswap unsing hardhat's mainnet fork but I'm getting this error: Error: Transaction reverted without a reason string
. And I don't really know why.
Here is my swap function:
...ANSWER
Answered 2022-Feb-17 at 06:46Weth
is different from other token, you're not able to use swapTokensForTokens
. We must use the swapEthForTokens
function instead, and you have to declare the data option separately.
so in your case we need to do:
Solidity code:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install bitcoin_in_a_nutshell
You can use bitcoin_in_a_nutshell like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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