Transaction

A crypto transaction is a signed instruction to move value or trigger a smart contract on a blockchain. It specifies details such as sender, recipient, amount, and a fee, and must be signed with the senders private key to be valid. Once broadcast, it waits in a queue before being included in a block and confirmed by the network.

A common misconception is that transactions are instant and reversible; in most networks they are irreversible once confirmed, and settlement can take time. See how a crypto transaction gets confirmed.