Ethereum: How to calculate transaction size before sending (Legacy Non-Segwit – P2PKH/P2SH)
Calculation of transaction size before sending Ethereum
As a website owner who uses Bitcoins and wants to prevent users from exceeding their bandwidth when sending operations, you have a good situation to understand how Ethereum works. In this article we will investigate the concept of the size of the operations before sending RPC API.
Why calculate the size of the operation?
The Legacy Non -Breed (LNW) Block Circuit, such as Ethereum Classic (ETC), Bitcoin Cash (BCH) and others, is determined by its useful cargo. In order for users to exceed their permeability limits, it is necessary to calculate the calculated amount of surgery before sending.
Legacy not segwit block height
Before calculating the size of the operation, you need to know the height of the block where the operation will be sent. You can get this information using ETH_BLOCKNUGER () “RPC API or by requesting a Bitcoin index file such asbtindex.dat.
Here’s an example of how to calculate the height of the block:
`Javascript
CONST BLOCKCHAIN = {
Blockheight: Null,
Data: {},
};
// Get the latest block
Async’s feature of Getlatsblock () {
Const Response = Waiting Fetch (‘
CONST DATA = JSON.
// …
blockchain.blockheight = data [0] .Height;
}
GetLATESTBLOCK ();
`
Calculation of transaction size
When you have a block height, you will be able to calculate the calculated surgery by summing up the following components:
- Operation Type : Txtype field determines the type of surgery (eg ‘Send’, ‘accept’, etc.)
2.
- Output data
: If your site uses a different output format, you may need to adjust this calculation accordingly.
Here’s an example of how to estimate the size of the operation operation operation using P2PKH:
`Javascript
CONST TXTYPE = ‘Send’;
CONST INPUTDATASISE = 0; // Suppose the simplicity is 0 bytes
// Evaluate the size of the operation (KB)
Calculatesize = inputdatize + 10; // Add some additional data (eg headlines, lining)
`
CODE EXAMPLE
Here’s a simple example of how to evaluate the size of the operation using Node.js and Ethers.js Library:
`Javascript
Const Ethers = requires (‘Ether’);
Async’s feature Calculansactize (blockheight) {
Const Blockchain = wait for Getblockchain ();
CONST TXTYPE = ‘Send’;
CONST INPUTDATASISE = 0; // Suppose the simplicity is 0 bytes
// Evaluate the size of the operation (KB)
Calculatesize = inputdatize + 10; // Add some additional data (eg headlines, lining)
the return is calculated;
}
Async’s feature getblockchain () {
Const Response = Waiting Fetch (‘
CONST DATA = JSON.
return Blockchain;
}
`
the best practice
When calculating the size of the operation before sending, remember:
- For most operations, round up to the nearest Kilobyte (KB).
- Add some additional data (eg headlines, padding) as a minimum rating.
- Consider using a more sophisticated assessment algorithm if you need accurate results.
By following these guidelines and understanding how Ethereum works, you can ensure that your site users do not exceed their permeability boundaries by sending operations. Happy coding!