Mastering Blockchain - Second Edition

Message call transaction

A message call requires several parameters for execution, which are listed as follows:

• The sender
• The transaction originator
• Recipient
• The account whose code is to be executed (usually same as the recipient)
• Available gas
• Value
• Gas price
• Arbitrary length byte array
• Input data of the call
• Current depth of the message call/contract creation stack

Message calls result in a state transition. The message calls also produce output data, which is not used if transactions are executed. In cases where message calls are triggered by VM code, the output produced by the transaction execution is used. As defined in the yellow paper, message call is the act of passing a message from one account to another. If the destination ...