Understand the Ethereum transaction costs: how to extract them from raw transactions
Ethereum transaction fees can be a significant part of the total cost of user transactions. Although the RPC GetTrawtransAction call” provides detailed information on transactions, including input and exit values, it does not directly reveal the amount of transaction costs. In this article, we will explore how to extract the transaction costs from raw transactions Ethereum.
Why are the transaction costs not included in "GetrawtransAction"?
The RPCGetrawtransAction ‘call recovers an instantaneous of all transactions on the Ethereum network at a specific block height. However, it does not include any metadata concerning the input and exit values, such as gas prices or transaction costs. These costs are calculated by the minor when they validate and perform each block.
Extraction of the transaction costs for raw transactions
To extract the transaction costs of the “getrawtransaction” results, you can use a combination of techniques:
1. Analyze transaction data
The response “GetTrawtransAction” contains a JSON object with various fields, including “Gas”, “Value” and “Entrance”. You can analyze this structure to access these values.
`Javascript
Const TX = Waits Provider.GetraWtransAction (ID);
Const transactionData = JSON.PARSE (TX.BODY);
Const Gasprice = transactiondata.gas;
Const Value = transactiondata.Value;
Const input = transactiondata.input;
// Calculate transaction costs
Const Transactionfee = Gas - (Gasprice / 1e8); // Convert to Wei and divide by 10 ^ 8
'
2. Use a library to analyze transaction data
You can use a library like "Ethers.js" or "Web3JS" to analyze and analyze raw transaction data. These libraries provide a more practical interface to work with Ethereum transactions.
Javascript
Const Ethers = require ('ethers');
Const TX = Waits Provider.GetraWtransAction (ID);
Const transactionData = Ethers.utils.pSSernsAction (TX);
// Calculate transaction costs
Const Gasprice = Ethers.utils.formatunits (transactiondata.Gas, "Gwei"); // convert to wei and format as a number
Const Value = transactiondata.Value;
Const input = transactiondata.input;
Const transactionfee = Gasprice - (value / 1e8); // Convert to Wei and divide by 10 ^ 8
'
3. Use the LibraryEthers.jsto obtain raw transactions
Alternatively, you can use the “Ethers.js” library directly to recover the raw transactions. This approach allows more flexibility in the analysis of transaction data.
Javascript
Const Ethers = require ('ethers');
Const Provider = NewThers.Providers.jsonrpcProvider ('
Const txid = 'Your_tx_id'; // replaced with the real transaction ID
// Get raw transactions for a specific block height
Const Rawtransactions = Await Provider.GetrawtransAction (TXID);
// loop in each gross transaction and extract transaction costs
Rawtransactions.Foreach ((transaction) => {
Const Gasprice = Transaction.Gas;
value of value = transaction.VALUE;
Const input = transaction.input;
// Calculate transaction costs
Const Transactionfee = Gas - (Gasprice / 1e8); // Convert to Wei and divide by 10 ^ 8
console.log (Transaction costs for $ {txid}:, transactionfee);
});
'
Conclusion
Although "GetrawtransAction" provides valuable information on Ethereum transactions, including input and exit values, it does not directly reveal the transaction costs. Using a combination of techniques such as JSON object analysis or the use of libraries to analyze raw transaction data, you can extract transaction costs from these results.
Do not forget to replace the reserved space values (for example,your_project_id, your_tx_id`) with your real infura project ID and your transaction ID respectively.