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2 votes

If you have the required mining power, is it possible to mine your transaction in the next block without propagating it to the network?

To add to Vojtěch's answer, take the point of view of nodes validating blocks on the network. How would they enforce that a transaction must have been propagated before it's included in a block? Not ...
Antoine Poinsot's user avatar
8 votes
Accepted

If you have the required mining power, is it possible to mine your transaction in the next block without propagating it to the network?

Yes, since miners (pools) construct the blocks they mine, they can insert any valid transactions they want, including transactions that were never broadcasted to the wider network. They don't even ...
Vojtěch Strnad's user avatar
3 votes

Can the two biggest bitcoin mining pools lock out all others?

A mining pool (or several cooperating mining pools) can only prevent others from mining if they maintain a majority of the hashrate. That can only happen if miners continue mining with them. Since ...
Vojtěch Strnad's user avatar
4 votes

Can the two biggest bitcoin mining pools lock out all others?

It's certainly not an ideal situation. However them cooperating to censor outsiders' blocks doesn't make it impossible for anyone else to "squeeze in a block" ever again. In order to prevent ...
Antoine Poinsot's user avatar

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