[ECIP-1104] BASEFEE omit, activations, last call

[diega]

This PR proposes the following changes:

• Exclude EIP-3198: BASEFEE Opcode from Mystique
• Add block number activation for each network based on the following calculations
  • Mordor (1587460 seconds until Jan 10th 2022): 5_294_406 block + 1_587_460 secs / 13.3 secs/block ~= 5_414_000 block
  • Kotti (2449694 seconds until Jan 20th 2022): 5_395_501 block + 2_449_694 secs / 15 secs/block ~= 5_559_000 block
  • Mainnet (4264005 seconds until Feb 10th 2022): 14_181_120 block + 4_264_005 secs / 13.3 secs/block ~= 14_502_000 block
• Change ECIP status to Last call

Ref: discussion #440

[diega]

cc: @ziogaschr @meowsbits @iquidus

[bobsummerwill]

Typo - "This opcode is being added to ensure alignement with evm standards but will not be used on chain."

Should be "alignment".

[meowsbits]

Is 10.5 secs/block for Mordor accurate?

[diega]

Is 10.5 secs/block for Mordor accurate?

It seems to be pretty erratic, I took it yesterday from Blockscout, but now it's at 15.4 secs/block. Do you think this value is more accurate?

[meowsbits]

I was mostly just wondering about exactly that; the variance, and where the estimate came from.
If we assume the true value is somewhere between the numbers you've cited, the actual time of forking hits a little later than Dec 15th. It won't hurt to have a little bonus time to get upgraded.