Working with Blockcerts raised a question for me. How does Blockcerts handle transactions? I’m creating certificates, and it requests a signature to complete the transaction. But how does Blockcerts manage the process of creating a transaction on Ethereum? I’ve read about how to perform transactions, but where does Blockcerts handle this? Is there a possibility for me to have more control over these transactions? I would like to calculate the cost of a transaction, and I believe knowing this could help.