# Coinbase (mining reward / transaction) aka **Coinbase** // **Coinbase Address** // **Generation Transaction** // **Coinbase Transaction** // **[[Mining Reward]]** 1. The first [[Transaction(s)|transaction]] in a block. Always created by a [[Miner(s)|miner]], it includes a single coinbase. 2. A Coinbase is essentially a digital [[Transaction(s)|transaction]] that is mandatorily added to the [[Block(s)|block]] of a particular [[Crypto (cryptocurrency)]]. In regards to the [[bitcoin (BTC)|BTC]] ecosystem, the flagship currency’s coinbase has an input size of 100 bytes. 3. Coinbase, in the context of [[Mining|mining]], is associated directly with a [[Block(s)|block]]. The coinbase of a block points out to the [[Address|address]] where [[Block Reward|block rewards]] are delivered.