How does Bitcoin core differentiate transactions category?

for instance, when we are calling listtrnasctions in the response body we have category, how bitcoin core assigns category type for a transaction? Programmatically, How it decides that some transaction should have send or receive string.

The answer is in here:

// Sent
if ((!listSent.empty() || nFee != 0) && (fAllAccounts || strAccount == strSentAccount))
{

}

// Received
if (listReceived.size() > 0 && wtx.GetDepthInMainChain() >= nMinDepth)
{
  
   
}

But can someone read and explain the code? I see that receive transactions have zero fees but what is listSent.empty() and other variables?

How does Bitcoin core differentiate transactions category?

for instance, when we are calling listtrnasctions in the response body we have category, how bitcoin core assigns category type for a transaction? Programmatically, How it decides that some transaction should have send or receive string.

The answer is in here:

// Sent
if ((!listSent.empty() || nFee != 0) && (fAllAccounts || strAccount == strSentAccount))
{

}

// Received
if (listReceived.size() > 0 && wtx.GetDepthInMainChain() >= nMinDepth)
{
  
   
}

Can someone read and explain the code? I see that receive transactions have zero fees, and Bitcoin core considers transactions with fees as sent.

How does Bitcoin core differentiate transactions category?

for instance, when we are calling listtrnasctions in the response body we have category, how bitcoin core assigns category type for a transaction? Programmatically, How it decides that some transaction should have send or receive string.

How does Bitcoin core differentiate transactions category?

for instance, when we are calling listtrnasctions in the response body we have category, how bitcoin core assigns category type for a transaction? Programmatically, How it decides that some transaction should have send or receive string.

The answer is in here:

// Sent
if ((!listSent.empty() || nFee != 0) && (fAllAccounts || strAccount == strSentAccount))
{

}

// Received
if (listReceived.size() > 0 && wtx.GetDepthInMainChain() >= nMinDepth)
{
  
   
}

But can someone read and explain the code? I see that receive transactions have zero fees but what is listSent.empty() and other variables?

How does Bitcoin core differentiate transactions category?

for instance, when we are calling listtrnasctions in the response body we have category, how bitcoin core assign category type for a transaction?

How does Bitcoin core differentiate transactions category?

for instance, when we are calling listtrnasctions in the response body we have category, how bitcoin core assigns category type for a transaction? Programmatically, How it decides that some transaction should have send or receive string.