nano-dpow | Nano 's unofficial Distributed Proof of Work system | Blockchain library

by guilhermelawless Python Version: 1.1 License: MIT

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | nano-dpow Summary

nano-dpow is a Python library typically used in Telecommunications, Media, Advertising, Marketing, Blockchain, Bitcoin, Nodejs applications. nano-dpow has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. However nano-dpow build file is not available. You can download it from GitHub.

Welcome to the Distributed Proof of Work (DPoW) system. The DPoW system allows any user to support Nano community services by computing the required proof of work for transactions. DPoW has helped reduce operating costs of community projects, such as faucets, tipping bots, and wallets. As a reward for helping, clients get occasional Nano payouts.

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Quality

Security

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Support

Quality

Security

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Support

nano-dpow has a low active ecosystem.

It has 24 star(s) with 48 fork(s). There are 7 watchers for this library.

It had no major release in the last 12 months.

There are 6 open issues and 19 have been closed. On average issues are closed in 69 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of nano-dpow is 1.1

nano-dpow Support

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nano-dpow Support

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Quality

nano-dpow has 0 bugs and 0 code smells.

nano-dpow Quality

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Average in #Blockchain

nano-dpow Quality

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Security

nano-dpow has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

nano-dpow code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

nano-dpow Security

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nano-dpow Security

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License

nano-dpow is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

nano-dpow License

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nano-dpow License

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Reuse

nano-dpow releases are available to install and integrate.

nano-dpow has no build file. You will be need to create the build yourself to build the component from source.

It has 1368 lines of code, 104 functions and 20 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

nano-dpow Reuse

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nano-dpow Reuse

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Top functions reviewed by kandi - BETA

kandi has reviewed nano-dpow and discovered the below as its top functions. This is intended to give you an instant insight into nano-dpow implemented functionality, and help decide if they suit your requirements.

Handle a client message

Publish a message to MQTT
Set the value of the key to expire
Update stats for a client

Handle a WSGI request

Handler for service requests
Update an entry
Compute the hash of x

Work loop

Create a new entry

Delete an entry

Check if a service exists

Handler for block arrival

Do setup

Send a request to the node

Handler for block arrival

Close the connection

Check if a service exists

Validate a given string

Creates a logger for the given directory

Create a socket

Handle JSON response

Main loop

Generate a random request

Show stats for given users

Start the daemon

Remove a block from the queue

Get all kandi verified functions for this library.

nano-dpow Key Features

Nano's unofficial Distributed Proof of Work (DPoW) system

nano-dpow Examples and Code Snippets

No Code Snippets are available at this moment for nano-dpow.

Community Discussions

Trending Discussions on Blockchain

Why Metamask if web3.js can interact directly with ganache?

How to get all the NFTs of particular smart contract

I am not able to use ipfs

Interacting With Contract Web3.js

Should I use the elrond devnet instead of the testnet for development?

Trying to run "brownie run .\scripts\deploy.py --network rinkeby" but getting a ValueError

I want to get the address from mnemonic with the proper derivation path

error in ganache installation: The term 'ganache-cli' is not recognized as the name of a cmdlet, function, script file, or operable program

Truffle installation error: "install latest visual studio version"

Why am I getting this error Error: Transaction reverted without a reason string. When trying to swap tokens on uniswap?

Trending Discussions on Blockchain

Why Metamask if web3.js can interact directly with ganache?

How to get all the NFTs of particular smart contract

I am not able to use ipfs

Interacting With Contract Web3.js

Should I use the elrond devnet instead of the testnet for development?

Trying to run "brownie run .\scripts\deploy.py --network rinkeby" but getting a ValueError

I want to get the address from mnemonic with the proper derivation path

error in ganache installation: The term 'ganache-cli' is not recognized as the name of a cmdlet, function, script file, or operable program

Truffle installation error: "install latest visual studio version"

Why am I getting this error Error: Transaction reverted without a reason string. When trying to swap tokens on uniswap?

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.

curl --request GET \
     --url https://api.opensea.io/api/v1/asset/0xb47e3cd837ddf8e4c57f05d70ab865de6e193bbb/1/

This is for a single asset and it requires a token id as well. But I want data of all the NFTs of a particular smart contract address just by giving the smart contract address.

And this is for a single contract.

curl --request GET \
     --url https://api.opensea.io/api/v1/asset_contract/0x06012c8cf97bead5deae237070f9587f8e7a266d

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:

curl 'https://api.opensea.io/api/v1/assets?offset=0&limit=20&asset_contract_address=0xb47e3cd837ddf8e4c57f05d70ab865de6e193bbb'

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...

const ipfsClient = require('ipfs-http-client');
const ipfs = ipfsClient({host: 'ipfs.infura.io', port: 5001, protocol: 
'https'});

function App() {
const [buffer, setBuffer] = useState();

const handleChange = (event) => {
  event.preventDefault();
  const file = event.target.files[0];
  const reader = new window.FileReader();
  reader.readAsArrayBuffer(file);
  reader.onloadend = () =>{
    setBuffer(reader.result);
  }

}

const handleSubmit = async(event) => {
    event.preventDefault();
    console.log('submitting...')
    await ipfs.add({buffer}, (error, result) => {
      console.log('ipfs results');
      if(error){
        console.error(error);
        return;
      }
    });
}

I am getting this error in browser...

TypeError: ipfsClient is not a function

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:

const { CID } = require('ipfs-http-client')

Those brackets are essential

What do {curly braces} around javascript variable name mean

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.

  const contract = new Contract(*abi*, '0x82194f7d4Ded53A546ec4e3A7a57f81C5a54E194');
  console.log("transaction sent");
  await contract.methods.transfer(address, amount).send({to: "0xxxxxx"});
  console.log("transaction sent really");
}

Also, is it acceptable to paste the abi directly into the constructor in between [] brackets, like so? const contract = new Contract(*abi*, '0x82194f7d4Ded53A546ec4e3A7a57f81C5a54E194');

Here is the Contract ABI

    "status": "1",
    "message": "OK",
    "result": "[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"burn\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"burnFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"subtractedValue\",\"type\":\"uint256\"}],\"name\":\"decreaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"addedValue\",\"type\":\"uint256\"}],\"name\":\"increaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"mint\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]"
  }]```

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

const abi = [{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}];

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

// TODO: Adjust with respect to current terminology (localnet instead of devnet).
function getDevnetProvider() {
    return new proxyProvider_1.ProxyProvider("http://localhost:7950", { timeout: 5000 });
}
exports.getDevnetProvider = getDevnetProvider;
function getTestnetProvider() {
    return new proxyProvider_1.ProxyProvider("https://testnet-gateway.elrond.com", { timeout: 5000 });
}
exports.getTestnetProvider = getTestnetProvider;
function getMainnetProvider() {
    return new proxyProvider_1.ProxyProvider("https://gateway.elrond.com", { timeout: 20000 });
}

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:

function getDevnetProvider() {
    return new proxyProvider_1.ProxyProvider("https://devnet-gateway.elrond.com", { timeout: 5000 });
}

And the devnet explorer is here: https://devnet-explorer.elrond.com/

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:

INFO: Could not find files for the given pattern(s).
Brownie v1.17.1 - Python development framework for Ethereum

  File "c:\users\allow\appdata\local\programs\python\python39\lib\site-packages\brownie\_cli\__main__.py", line 64, in main
    importlib.import_module(f"brownie._cli.{cmd}").main()
  File "c:\users\allow\appdata\local\programs\python\python39\lib\site-packages\brownie\_cli\run.py", line 44, in main
    network.connect(CONFIG.argv["network"])
  File "c:\users\allow\appdata\local\programs\python\python39\lib\site-packages\brownie\network\main.py", line 40, in connect
    web3.connect(host, active.get("timeout", 30))
  File "c:\users\allow\appdata\local\programs\python\python39\lib\site-packages\brownie\network\web3.py", line 52, in connect
    uri = _expand_environment_vars(uri)
  File "c:\users\allow\appdata\local\programs\python\python39\lib\site-packages\brownie\network\web3.py", line 183, in _expand_environment_vars
    raise ValueError(f"Unable to expand environment variable in host setting: '{uri}'")
ValueError: Unable to expand environment variable in host setting: 'https://rinkeby.infura.io/v3/$WEB3_INFURA_PROJECT_ID'

Here is my deploy.py code

from brownie import accounts, config, SimpleStorage, network
import os

def deploy_simple_storage():
    account = get_account()
    simple_storage = SimpleStorage.deploy({"from": account})
    stored_value = simple_storage.retrieve()
    print(stored_value)
    transaction = simple_storage.store(15, {"from": account})
    transaction.wait(1)
    updated_stored_value = simple_storage.retrieve()
    print(updated_stored_value)


def get_account():
    if network.show_active() == "development":
        return accounts[0]
    else:
        return accounts.add(config["wallets"]["from_key"])


def main():
    deploy_simple_storage()

I have a really little experience in coding. I think the problem is related to .env, but I don't know what I should now. FYI I am using windows n follow this course https://www.youtube.com/watch?v=M576WGiDBdQ stuck at 4:48:00

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.

from bip_utils import *

MNEMONIC = "...12 words phrase..."

seed_bytes = Bip39SeedGenerator(MNEMONIC).Generate("")

bip44_mst_ctx = Bip44.FromSeed(seed_bytes, Bip44Coins.SOLANA)

bip44_acc_ctx = bip44_mst_ctx.Purpose().Coin().Account(0)

bip44_chg_ctx = bip44_acc_ctx.Change(Bip44Changes.CHAIN_EXT)

print(bip44_chg_ctx.PublicKey().ToAddress())

This code outputs the first address of your mnemonic. This is only for Sollet and Phantom wallet!

If you are using Solflare you can cut the line bip44_chg_ctx = bip44_acc_ctx.Change(Bip44Changes.CHAIN_EXT) out!

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

npm install -g ganache-cli

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

npm install -g npm@7.24.2

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:

    function swap(address router, address _tokenIn, address _tokenOut, uint _amount) public {
        IERC20(router).approve(router, _amount);
        address[] memory path;
        path = new address[](2);
        path[0] = _tokenIn;
        path[1] = _tokenOut;
        uint deadline = block.timestamp + 300;  
        IUniswapV2Router(router).swapExactTokensForTokens(_amount, 1, path, address(this), deadline);  
}

It is a simple function and it should work. This is how I'm calling it:

await arb.swap(
    uniAddress,
    wethAddress,
    daiAddress,
    ethers.utils.parseEther('0.5')
);

Thanks for answers!

Also here are the addresses I'm calling just to verify if they are the right ones but I'm pretty sure they are:

const wethAddress = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2';
const daiAddress = '0x6B175474E89094C44Da98b954EedeAC495271d0F';
const uniAddress = '0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D';

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:

function swapEth(address router, address _tokenIn, address _tokenOut, uint _amount) public {
    IERC20(router).approve(router, _amount);
    address[] memory path;
    path = new address[](2);
    path[0] = _tokenIn;
    path[1] = _tokenOut;
    uint deadline = block.timestamp + 300;
    IUniswapV2Router(router). swapExactETHForTokens(... parameters);  
}

JSCode

const dataOption = { gasPrice: ethers.getDefaultProvider().getGasPrice(), gasLimit: 310000, value: ethers.utils.parseEther('0.5') }

await arb.swap(`enter code here`
    uniAddress,
    wethAddress,
    daiAddress,
    ethers.utils.parseEther('0.5'), // this parameter should be remove from the function declaration as well as in this Javascript
    dataOption
);

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

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