Quote from: freeshippingislaw on October 26, 2017, 10:42:07 PM

Hi OP, love the concept! I have a clarification question. Will the minimum required gas for a successful call to Mine() increase as the number of calls to Mine() increase? If not, then will the minimum required gas be determined by the instantaneous largest gas limit set by the current competing Txs? Also, if two wallets invoke Mine() with the same gas limit at the same time, is it possible for both invocations to return true or will only one of them return true? Thank you for advising.

The minimum gas accepted depends on the ethereum network.

Some transactions are processed with as low as 0.1 GWEI of gas, but with the current gas market we recommend 1 GWEI to be safe.

You can check this website here where you can see the current "safe-low" for ethereum transactions: http://ethgasstation.info/

About your question with the two wallets, yes it is possible that both return true, there is no problem with that.