Ethereum: Why does IsCoinBase() check if there is exactly one input?

** Ethereum: Understanding the “Iscoinbase ()function

In blockchain ethereum, transactions can be divided into two types: coins and coins. The coin transaction is a special type of transaction that includes additional input data known as the "coin" or "fee" input. This contribution is used to pay for creating a new coin in the Ethereum network.

The "Iscoinbase () function in the Bitcoin core allows programmers to check whether a given transaction is the Coinbaza base or not. But what exactly does it doing? In this article, we will break down why Iscoinbase () checks whether it is exactly one contribution, and we give examples illustrating its functionality.

** Why check if exactly one entrance?

It is necessary in the context of coin transaction, having exactly one input data. Here's why:

• The Coinbase transaction includes additional input dataTX_IN, which represents the input data used for payment for creating a new coin.

• If there were a lot of input data in the transaction, it would be difficult to determine whether they are all part of the same coin base or not. The presence of many input data may indicate that the transaction is not a coin base.

• By checking if there is exactly one input data, Iscoinbase () ensures that considering only transactions at the entrance of one fee.

Implementation details

The implementation of "Iscoinbase () in Bitcoin Core is as follows:

C

Bool Iscoinbase () const {

Return (vin.size () == 1 && vin [0] .Prevout == null || vin.size () == 2 && vin [0] .Prevout! = Null);

}

Here’s what is happening:

• Vin.size () Returns the number of entries in the transaction.

• (Vin.size () == 1) checks if there is exactly one entrance. If not, the function immediately returns False.

• & & vin [0] .Prevout == null checks whether the first entrance (which corresponds to the fee) is null. If this is not Null, then we have a Coinbase transaction with many inputs, and the function returns false.

• The second condition (Vin.size () == 2 && Vin [0] .Prevout! = Null) is used for verification, which are exactly two entries in the transaction (one fee input and one output). However, this condition only checks if the first output corresponds to the entrance of the fee; It does not guarantee that there is no additional Coinbase input.

Application

To sum up, the “Iscoinbase ()” function checks exactly one entry into the transaction, because having many entries can cause that they have been distributed whether they are all part of the same coin base or not. By checking if there is only one fairy entrance and that there is two total input data (one fee and one output), Iscoinbase () ensures accurate identification of the coin transaction.

While working with the development of Ethereum, knowledge about how the “Iscoinbase () functions can help you write a more reliable and reliable code that accurately identifies coin transactions.