Categories
Cryptocurrency Development Ethereum

Connect ethereum node

How to configure a node and connect it to a browser so that I can perform erc20 token transactions on my site between users?

Categories
Cryptocurrency Development Ethereum

Gas estimation errored with the following message (see below). The transaction execution will likely fail

can someone help me with this quesion, please When i try to excute deposit function, it shows Gas estimation errored with the following message (see below). The transaction execution will likely fail. Do you want to force sending? execution error: revert { mapping (string => mapping(string => int)) gameResult; address player1; bool hasRight1; address player2; […]

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Cryptocurrency Development Ethereum

How to interact with smart contracts on Ganache from Express app

How can I interact with the smart contract on ganache from my express app using Web3.js Any Tutorials?

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Cryptocurrency Development Ethereum

How to recieve notification of incoming transaction in metamask mobile in real time

I have a erc-20 token in the ropsten testnet and i am using my metamask for admin my token, and i just want to recieve a notification via sms, to take screenshot, whatsapp or another way frendly user, when i recieve an incoming transaction in the metamask mobile app instantly whe the transaction is confirmed.

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Cryptocurrency Development Ethereum

No events where emmited. Why?

This is not a duplicate question. The other one doesn’t answer the problem in any way. Can anyone explain to me why do I get No Events where emmited when running truffle test? Ganache is listening in 7545 and my truffle config file points to that port. I can see more blocks being produced in […]

Categories
Cryptocurrency Development Ethereum

how to specify transfer from(address not the sender address) to (address)

reciver.transfer(10 ether); in this function, the sender is the one who calls this function but i dont want to transfer from the sender. I want to transfer money from another address.

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Cryptocurrency Development Ethereum

Stop watching events

i have activated watching events with Contract.events.events_name(filter, lastBlock), now i need stop watching this event. I don’t find the command in web3 docs. Web3 version: 1.2.1. How can i stop watching events, please?

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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?

Categories
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! […]