Null Data (OP_RETURN) Transaction

Definition

A transaction type relayed and mined by default in Bitcoin Core 0.9.0 and later that adds arbitrary data to a provably unspendable pubkey script that full nodes don’t have to store in their UTXO database.

Synonyms

• Null data transaction

• OP_RETURN transaction

• Data carrier transaction

Not To Be Confused With

• OP_RETURN (an opcode used in one of the outputs in an OP_RETURN transaction)

Links

• Null data transaction — Developer Guide

• Pull request implement null data transactions — GitHub