Intermediate. In a few words, a candidate block is a block that a mining node (miner) is trying to mine in order to receive the block reward . So a candidate block may be described as a temporary block that will be either validated or discarded by the network.
Read moreHow long does 6 blocks take Bitcoin?
The average time for mining a block is 10 minutes, and when 6 blocks have to be mined for one transaction, it means it will take an average of 60 minutes to process a full Bitcoin transaction.
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