Ethereum: How to retrieve the from and to wallet addresses of a transaction?

Ethereum: Retrieving the Input and Output Wallet Addresses of Transactions

Ethereum provides a robust framework for managing transactions and their associated wallets. Understanding how to retrieve the input and output wallet addresses of a transaction is crucial for various use cases, such as token management, smart contract implementation, and decentralized application (dApp) development.

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 is 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 a transaction
async function getWalletAddresses(hash, networkName) {
const tx = await ethers.providers.estimateGas({ from: '0x...', to: ... });
if (tx.gasLimit < 1000000) {
// Use the local provider's gas estimation API for small transactions
return estimateGAS(tx);
} else {
// Use the Ethereum mainnet's gas estimation API for larger transactions
const gasPrice = await ethers.provider.getGasPrice();
const tx = await ethers.providers.estimateTransactionGas(hash, gasPrice);
return tx;
}
}
asynchronous function estimateGAS(tx) {
// Calculate the estimated gas price and quantity
const gasPrice = await ethers.provider.getGasPrice();
const gasAmount = (tx.gasLimit - 1) * gasPrice / 1000;
// Create an options object for the transaction estimation API
return new ethers.providers.TransactionEstimationOptions({
to: '0x...', // recipient address
gasPrice: gasPrice,
gasAmount,
});
}

Taking the wallet address entered

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 `ethers-transaction-inputs'' package:

const ethers = require('ethers');
const TransactionInputs = require('ethers-transaction-inputs');
// Get the transaction hash and network name
async function getWalletAddresses(hash, networkName) {
// Use your local provider's transaction input API for small transactions
const txInputs = await ethers.providers.estimateTransactionInput(hash);
return txInputs;
}

To get the output wallet addresses of a transaction, you will need to estimate the price and gas amount for each input. You can use the ethers.js` library or other APIs for this purpose.

Here is an example of using the “ethers-transaction-output-estimation” package:

const ethers = require('ethers');
const TransactionOutputEstimation = require('ethers-transaction-output-estimation');
// Get the transaction hash and network name
async function getWalletAddresses(hash, networkName) {
// Use the local provider’s transaction output estimation API for small transactions
const txOutputEstimation = await ethers.providers.estimateTransactionOutput(hash);
return txOutputEstimate;
}

Conclusion

In this article, we demonstrated how to retrieve the input and output wallet addresses of a transaction using the built-in Ethereum APIs and libraries. By understanding these concepts and implementing them in your own code, you will be well-equipped to manage transactions and wallets for various use cases.

Remember to always verify the authenticity of the information provided and handle any errors that may occur during the process.

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