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API Cryptocurrency Development Ethereum

Api to get total transfer count of an ERC-721 Token

I want to retrieve the total number of an erc 721 token’s transfers/ transactions. I couldn’t scrape the transfers value from etherscan as well e.g. given here https://etherscan.io/token/0x06012c8cf97bead5deae237070f9587f8e7a266d. Is there any api by which I can just get the total amount of transcations/transfers of an ERC-721 token?

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Cryptocurrency Development Ethereum

How much gigabytes of storage can ethereum block chain handle? And what is the mechanism of distributing data all over the network?

I have read about block chain technology, I became interested in the fact that block chain works like a global distributed data-base and computer, which is amazing. However, that global computer for sure has a maximum memory storage capacity. I am asking for an estimate to that, even though I know it is too much. […]

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Cryptocurrency Development Ethereum

error while installing web3 in ubuntu

gyp WARN install got an error, rolling back install gyp WARN install got an error, rolling back install gyp ERR! configure error gyp ERR! stack Error: EACCES: permission denied, mkdir ‘/usr/lib/node_modules/we b3/node_modules/sha3/.node-gyp’ gyp ERR! System Linux 4.15.0-70-generic gyp ERR! command “/usr/bin/node” “/usr/lib/node_modules/npm/node_modules/node-gy p/bin/node-gyp.js” “rebuild” gyp ERR! cwd /usr/lib/node_modules/web3/node_modules/sha3 gyp ERR! node -v v12.13.1 gyp ERR! […]

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Bitcoin Cryptocurrency Development

When exactly do the transactions get validated?

I have some gaps in my understanding to the life cycle of the transaction that I want someone to help me fill them specially with the validation. What I understand about the life cycle with my questions: 1) Transaction is signed off by the user through the wallet app and broadcasted to the blockchain network. […]

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Bitcoin Cryptocurrency Development

Is trading cryptocurrency in india illegal or legal?

Is btc trading legal ? how to proceed into this business if this is legal in india! Please share your views and suggestions. how this business works and whether this business is profitable or not. Thank you!

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Bitcoin Cryptocurrency Development

What would the effect of a very long bear market be on the Bitcoin economy?

I don’t mean to be a doomsday prophet or spread FUD, but I need to know if Bitcoin (or any PoW coin) investors should be concerned about the following scenario: Assume Bitcoin goes in a very long bearish market which makes mining unprofitable and cause many mining companies/individuals to go bankrupt. From my understanding, the […]

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Android Cryptocurrency Development Ethereum Java

Web3J Java Android SendAsync Error

I am trying to interact with a method in my smart contract. The method is a simple method where you send a string value to a global variable. I end up using a SendAsync which appears to initially work, but the data isn’t being sent. The code I am trying to get working is as […]

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Cryptocurrency Development Ethereum

Web3 Ethereum log subscriptions – removed field?

I am trying to subscribe to Ethereum events (via Infura) but I’m a bit confused. I am following this documentation: https://web3js.readthedocs.io/en/v1.2.0/web3-eth-subscribe.html#subscribe-logs Here is my code: const ep = ‘wss://goerli.infura.io/ws/v3/<XXX>’ const Web3 = require(‘web3’) const address = ‘0xdf9E19BB25A200429511bE09892A9B6A4842d483’ const web3ws = new Web3( new Web3.providers.WebsocketProvider( ep ) ) web3ws.eth.subscribe( ‘logs’, { address: address, }, function( error, […]

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Cryptocurrency Development Ethereum

Calling contract method results in metamask error using ganache

I have a simple Vue form, that calls a method in an Ethereum contract. If I don’t provide a callback to my method, Metamask complains: Uncaught Error: The MetaMask Web3 object does not support synchronous methods like eth_sendTransaction without a callback parameter. So I added this. (even though I already have a callback in my […]

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Cryptocurrency Development Ethereum Windows

what kind of Hardware required for run geth private chain for ethereum on windows?

i need to help to find out what were the minimum hardware requirements needed for deploy the private chain on ethereum.