Transaction Deadlines

Every transaction contains a deadline parameter, set to a number of minutes from the time the transaction is submitted to the network. The default deadline is 1440 minutes (24 hours). A transaction that has been broadcast to the network but has not been included in a block yet is referred to as an unconfirmed transaction.

If a transaction has not been included in a block before the transaction deadline expires, the transaction is removed from the network.

Transactions may be left unconfirmed until their deadline expire, because they are permanently invalid or malformed, or because they do not meet certain temporary conditions such as sufficient balances, or because blocks are being filled with transactions that have offered to pay higher transaction fees.