Ethereum: Retrieving the Incoming and Outgoing Wallet Addresses of a Transaction
Ethereum provides a robust framework for managing transactions and the wallets associated with them. Understanding how to retrieve the input and output wallet addresses of a transaction is crucial for a variety of use cases, such as token management, implementing smart contracts, and developing decentralized applications (dApps).
In this article, we will explore how to extract wallet addresses from a transaction using Ethereum’s built-in APIs and libraries.
Transaction Hash
To retrieve the input and output wallet addresses of a transaction, you first need to obtain its hash. You can find the transaction hash by querying the Ethereum blockchain or using the “ethers.js” library. Here’s an example:
const ethers = require('ethers');
// Get the transaction hash from the blockchain
async function getTransactionHash(transaction) {
const tx = await ethers.getTransaction(transaction);
return tx.hash;
}
// Get the input and output wallet addresses of the transaction
async function getWalletAddresses(hash, networkName) {
const tx = await ethers.providers.estimateGas({ from: '0x...', to: ... });
if (tx.gasLimit < 1000000) {
// For small transactions, use the local provider's gas estimation API
return estimateGAS(tx);
} else {
// For larger transactions, use the Ethereum mainnet gas estimation API
const gasPrice = await ethers.provider.getGasPrice();
const tx = await ethers.providers.estimateTransactionGas(hash, gasPrice);
return tx;
}
}
async function estimateGAS(tx) {
// Calculate gas price and estimated quantity
const gasPrice = await ethers.provider.getGasPrice();
const gasAmount = (tx.gasLimit - 1) * gasPrice / 1000;
// Create an option object for the Trade Estimation API
return new ethers.providers.TransactionEstimationOptions({
to: '0x...', // recipient address
gasprice: gasprice,
gasamount,
});
}
Taking the input wallet address
Once you have the transaction hash, you can use the ethers.js library or other APIs to retrieve the input wallet addresses. A popular option is to use the “ether-transactions-inputs” package:
const ethers = require('ether');
const TransactionInputs = require('ether-transaction-inputs');
// Get the transaction hash and network name
asynchronous function getWalletAddresses(hash, networkName) {
// For small transactions, use the local provider's transaction input API
const txInputs = await ethers.providers.estimateTransactionInput(hash);
return txInputs;
}
Retrieving output wallet address
To retrieve the output wallet addresses of a transaction, you will need to estimate the price and gas amount of each input. You can use the ethers.js library or other APIs for this.
Here is an example of using the “ether-transaction-output-estimation” package:
const ethers = require('ether');
const TransactionOutputEstimation = require('ether-transaction-output-estimation');
// Get the transaction hash and network name
asynchronous function getWalletAddresses(hash, networkName) {
// For small transactions, use the local provider's transaction output estimation API
const txOutputEstimation = await ethers.providers.estimateTransactionOutput(hash);
return txOutputEstimation;
}
Conclusion
In this article, we showed you how to retrieve the input and output wallet addresses of a transaction using Ethereum’s built-in APIs and libraries. By understanding these concepts and implementing them in your code, you will be well-prepared to manage transactions and wallets for various use cases.
Remember to always verify the authenticity of the information provided and fix any errors that may occur during the process.