Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

This tag should be used for unconfirmed transactions, transactions that have not yet been included in a block.

An unconfirmed transaction is a valid transaction which has not been confirmed, i.e. it has not yet been included in a block. A transaction may be unconfirmed for many reasons: it was recently broadcast and a block has not yet been found, it's transaction fee is too low, it has many unconfirmed parent transactions, etc.

Unconfirmed transactions should generally not be accepted as a payment unless the receiver is highly confident that the transaction will confirm. Even so, high value payments should wait for a confirmation before considered final as double spending an unconfirmed transaction is fairly trivial, even without the Replace-By-Fee node policy employed today by many nodes.

history | excerpt history