pyspv | python implementation of a programmable Bitcoin SPV node

 by   sarchar Python Version: Current License: MIT

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kandi X-RAY | pyspv Summary

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pyspv is a python implementation of a programmable Bitcoin SPV node
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            pyspv Key Features

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            pyspv Examples and Code Snippets

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            Community Discussions

            QUESTION

            Why Metamask if web3.js can interact directly with ganache?
            Asked 2022-Mar-30 at 17:55

            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 09:11

            If 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).

            Source https://stackoverflow.com/questions/70952165

            QUESTION

            How to get all the NFTs of particular smart contract
            Asked 2022-Mar-30 at 11:00

            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 15:03

            The 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:

            Source https://stackoverflow.com/questions/68651167

            QUESTION

            I am not able to use ipfs
            Asked 2022-Mar-29 at 03:32

            I want to publish files on ipfs but it's showing me an error.

            Here is my code...

            ...

            ANSWER

            Answered 2021-Nov-11 at 04:27

            I am not familiar with ipfs but i checked the official docs and they have done the first line like this:

            Source https://stackoverflow.com/questions/69897780

            QUESTION

            Interacting With Contract Web3.js
            Asked 2022-Mar-19 at 17:10

            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 17:10

            The 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

            Source https://stackoverflow.com/questions/71534875

            QUESTION

            Should I use the elrond devnet instead of the testnet for development?
            Asked 2022-Mar-08 at 09:03

            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?

            utils.ts

            ...

            ANSWER

            Answered 2021-Aug-24 at 12:56

            The 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:

            Source https://stackoverflow.com/questions/68863572

            QUESTION

            Trying to run "brownie run .\scripts\deploy.py --network rinkeby" but getting a ValueError
            Asked 2022-Mar-01 at 18:15

            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 10:14

            it 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

            Source https://stackoverflow.com/questions/70098080

            QUESTION

            I want to get the address from mnemonic with the proper derivation path
            Asked 2022-Feb-23 at 00:41

            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 00:41

            After a long search through the internet, I have finally found a way of solving my problem that I want to share with you.

            Source https://stackoverflow.com/questions/71217530

            QUESTION

            error in ganache installation: The term 'ganache-cli' is not recognized as the name of a cmdlet, function, script file, or operable program
            Asked 2022-Feb-18 at 17:26

            I installed ganache with yarn, but when I check the version to see if correctly installed, I get the error: "The term 'ganache-cli' is not recognized as the name of a cmdlet, function, script file, or operable program".

            ...

            ANSWER

            Answered 2021-Oct-18 at 02:20

            I had the same issue but then I installed with npm and it worked

            Source https://stackoverflow.com/questions/69236378

            QUESTION

            Truffle installation error: "install latest visual studio version"
            Asked 2022-Feb-17 at 16:59

            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 16:59

            If 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

            Source https://stackoverflow.com/questions/70954642

            QUESTION

            Why am I getting this error Error: Transaction reverted without a reason string. When trying to swap tokens on uniswap?
            Asked 2022-Feb-17 at 06:46

            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 06:46

            Weth 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:

            Source https://stackoverflow.com/questions/71152833

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

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