## What happens after updating expired participant key?

Thank you so much for your patience and the detailed reply, Fabrice!  
I still have one more question. From here, it states that The previous hash is a cryptographic hash of the previous block header in the sequence of blocks. So the hash...

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Thank you for the reply! I’m just curious about the field ParticipationUpdates. The field ParticipationUpdates of block n, it contains the Expired Participation Accounts after block n generation, or the...

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Hi everyone, I’m currently studying how the chain works and one question bothers me. After generating a block and finishing the voting, what happens if a participant key expired? In my opinion, I think the chain will update this info but I don’t know the effect of this update. I suppose the block...

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## Question about inner transactions fields set

Thank you for the quick reply, Fabrice. That helps a lot!

Hi everyone, I have some questions about building inner transactions in a smart contract and any help is appreciated.  
If I want to build an inner transaction in the contract and use it to transfer asset to another account, do I have to name the xfer_asset in the InnerTxnBuilder.SetFields if that’s...

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## Question related to group transactions

Thank you for the detailed response, Fabrice. I’m still having some questions about the field Fee and pay. The doc says ’ Pooled transaction fees - One transaction pays the fees of others.’, but how can we specify which transaction in the group pays all fee. Also, if I would like to make sure that...

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Hi everyone, I wonder if the transaction order of a group orders is based on the groupIndex. Also, if I used txn Fee in the contract for a group order function, does it refer to txn 0? Or does the txn refer to the first transaction that sender is lsig. TYSM!