8

A block may contain only one transaction: the coinbase transaction. However, the time it takes to mine a block is not affected by the number of transactions in that block, so mining blocks with fewer transactions does not benefit the miner. On the other hand, miners collect fees from the transactions they include in a block, so by including more transactions ...


6

Miners pick transactions from the mempool which is the queue of unconfirmed transactions. When there are fewer transactions waiting than would fit into a block, the block will not be full. The miner could create more transactions themselves, but that would be only useful if they wanted to send one themselves already in the first place, otherwise they'd just ...


4

The process of a transaction being created and included in the blockchain is as follows: The sender creates, signs, and broadcasts the transaction All Bitcoin full nodes, including miners and regular users, receive the transaction and validate it by making sure it follows the Bitcoin protocol rules Nodes temporarily store the unconfirmed/yet-to-be-mined ...


2

When a miner validates a block, does the block contain all transactions in Bitcoin for that time period? See this question for info about the structure of a block. A block can contain up to 4,000,000 weight units worth of transactions. So the miner can select transactions to include in the block, up to this limit. Generally, the miner will select the ...


2

The answer is one, the coinbase transaction.


2

While miners do try to maximize transaction space, they can't always fill a block. Miners usually start with a block template that contains just the coinbase transaction - that alone will net them the block reward, currently 12.5 BTC. Any transaction fees over and above that are "free" money. When blocks are mined in quick succession, it may take miners a ...


1

Miners do optimize the block construction process internally. Unfortunately they do not share this information with the community, so we don't know what methods they use, how they choose TX's and how they distribute work to pool participants. Both mining machines and mining software the big miners use are secret. Modern ASIC machines' hardware are closed ...


1

Nodes will relay all transactions to each other, true. But, how do you know all miners have the same block if only one is actually published? In any case, miners are incentivized monetarily to include the transactions with the highest fee rate (fee/kB) because the miner gets all of the transaction fees. So, it would not be surprising if miners had similar ...


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