Ethereum: Checking/polling a balance of an address in Electrum via the command line/RPC
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Checking and Interrogating Ethereum Balances Using Electrum CLI and RPC
The Ethereum decentralized platform provides a robust API for interacting with the network, allowing developers to programmatically check and interrogate address balances in a variety of ways. In this article, we will explore how to use the Electrum command line interface (CLI) and remote procedure call (RPC) API to accomplish this task.
Prerequisites
Before you begin, make sure you have:
- An Ethereum wallet is set up and linked to a compatible cryptocurrency account.
- Installed the ethers.js library: npm install ethers or yarn add ethers
- Installed the Electrum CLI: [Install Electrum CLI](
Method 1: Using the Electrum CLI
You can use the Electrum CLI to query the balance of an Ethereum address directly from your terminal. Here are the steps:
- Get the wallet private key: Make sure you have access to the private key of the account you want to verify.
- Set up the Electrum CLI
:
”bash
npx @openethereum cli init –name eth-cli –default-wallet private_key
Replace "private_key" with your actual wallet private key.
List all addresses: Run the following command to display a list of all addresses in the wallet:
''bash
eth account list
- Query address balance: Select the address you want to check and run the following command:
”bash
eth balance –address
-count 1Replace “
” with the desired Ethereum address.
Method 2: Using Electrum RPC
The Electrum RPC API provides a more convenient way to communicate with an Ethereum wallet, allowing you to query balances without having to set up multiple connections. To use RPC, first install the ethers.js library and import it into your application:
javascript
const { ethers } = require(‘ethers’);
Then create a new Electrum API client instance:
javascript
const api = new ethers. Wallet(privateKey);
Here is an example of how to query the balance of an address using RPC:
Get the wallet private key: Make sure you have access to the private key of the account you want to check.
Create a new Electrum API client instance:
javascript
const api = new ethers. Wallet(privateKey);
List all addresses: Run the following command to display a list of all addresses in the wallet:
''bash
list eth accounts
- Query the address balance: Select the address you want to check and run the following code:
async function getBalance(address) {
try {
const balance = await api.getBalance(address);
console.log(Address: ${address}, balance: ${balance});
} catch (error) {
console.error(error);
}
}
Replace “address’ with the desired Ethereum address.
Example use cases
- Transaction automation
: You can use this technique to automate transactions by polling the address balance and using it as input to a script or application.
- Wallet balance monitoring: This technique allows you to monitor wallet balances in real time and ensure that accounts are updated correctly.
By following these steps and examples, you can easily poll Ethereum address balances using the Electrum CLI and RPC API to manage and programmatically interact with digital assets.
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