I encountered a problem while writing a smart contract to send ETH. Please provide me with an answer

[Apostleasd]

As shown in Figure 1, I have used Solidity to write contracts SendEth for sending ETH and EthReceiver for receiving ETH, and have already sent 1 ETH token to the SendEth contract during deployment

However, when I called the sendViaTransfer function in SendEth, I found that the address displayed in the log for 'from' was not the address of the SendEth contract, but another address I had not seen before.
I have also considered whether it is possible that it is the caller's address, but if it is the caller's address, why can we use the ETH in the contract address?

[EngrPips]

Hello @Apostleasd, The from field you saw when you opened the transaction details of the sendViaTransfer function does not specify the sender of the ETH but instead, the address that initiated the sendViaTransfer transaction. So, the ETH was sent using the SendEth contract. The address displayed in the from field of the sendViaTransfer transaction details is the address your remix was connected to when you clicked on the sendViaTransfer function button.

[Apostleasd]

OK，I got it，thank you very much!

[EngrPips]

I am glad you got it. Keep crushing it, friend.