hdwallet | HD wallet BIP-32 related key derivation utilities | Cryptography library

I am trying to sign a message in go generated via hd wallet's private key using cosmos sdk. Below is the equivalent implementation in python which generates the signed message / signature as expected when submitted/verified is working properly but unable to get it working wtih Go implementation. Any inputs for equivalent golang version of the python implementation is much appreciated. Thank you.

Python version uses sha256 , ecdsa but when using the equivalent cyrpto/ecdsa doesn't return valid signature.

Python

I am trying to generate hd wallet private keys , public keys and addresess using cosmos sdk. Below is the equivalent implementation in python which generates the keys , address as expected but when trying to generated in golang using cosmos sdk it won't generate same keys. Any inputs for equivalent golang version of the python implementation is much appreciated. Thank you.

Python

I export JSON interface from compile.js file but deploy.js file not work it shows error as

I am running into a bug when trying to run 'npm start' for a react app.

My app had been running mostly as I expected while developing, however I ran into a bug that required me to update my node version as a potential fix. I updated node to v16.13.2 and I also decided to update npm to v8.3.2. Now when trying to run npm start I receive the following error. I also find it odd that the files referenced are not from directories within my current project folder.

I have tried the following so far:

1. Deleting the package-lock.json and node_modules folder and then reinstalling with npm install.
2. Restarting my computer.
3. npm install react-scripts.

I was wondering if anyone could kindly help with a solution?

I finished up an Ethereum smart contract course on Udemy that used solc@^0.4.17, React and Next.js. I thought it would be a fun exercise to try and upgrade everything to the latest version and try to refactor. I have the following code in a file called factory.js being imported into my main index file:

I deployed a simple NFT smart contract on polygon mumbai testnet but when I am trying to verify it then It is showing an error. please guide me how to verify it...

This is the error which I am getting

I have upgaded m project Node version with all dependancies now I am attempting upgrade to Webpack 4 to Webpack 5. However when I run npm start I get this error. Strange thing is I don't use applyWebpackOptionsDefaults anywhere and after scouring the node_modules I see that it is used in the webpack lib quite a few times. Can anyone tell me what I am doing wrong? Is there a package I haven't updated? What am I missing?

Invalid options object. Dev Server has been initialized using an options object that does not match the API schema.

• options has an unknown property 'before'. These properties are valid: object { allowedHosts?, bonjour?, client?, compress?, devMiddleware?, headers?, historyApiFallback?, host?, hot?, http2?, https?, ipc?, liveReload?, magicHtml?, onAfterSetupMiddleware?, onBeforeSetupMiddleware?, onListening?, open?, port?, proxy?, server?, setupExitSignals?, static?, watchFiles?, webSocketServer? }

Here is the package.json:

I am trying to deploy a smart contract to the Ropsten test net.

I have tried to add the private keys mnemonic to a .secret file but get the following error below when running in the terminal truffle migrate --network ropsten

Error: Private key does not satisfy the curve requirements (ie. it is invalid)

The infura api key works by importing it with dot env.

The mnemonic private key is from a metamask wallet.

This is what is in the truffle.config file now:

I compiled a Python script into an exe file, but after opening the exe, the console opens and an error occurs, then the console immediately closes. Perhaps this is due to the fact that I am using downloaded libraries (web3, bs4, hdwallet, bip_utils)