KIP-4: "create2" Host Function for pWASM

[sorpaas]

rel openethereum/parity-ethereum#9139

(Rendered)

I found no other KIPs in this repo for reference, so please let me know if anything's not right.

[NikVolf]

There might be no regular create ever used on chain, so we might as well replace the behaviour of regular create?

[sorpaas]

@NikVolf I'm worried it might break consensus. At any moment that assumption may be broken because deploying a contract using create on Kovan is trivial..

[NikVolf]

can this also be updated to avoid mentioning id-s (like #6)? (i cant do it myself, since it's pr from fork)

also CREATE2 should be create2, since wasm imports are not capitalized

[sorpaas]

Done!

[lexfrl]

Please, don't forget to update the docs https://paritytech.github.io/pwasm-ethereum/pwasm_ethereum/ (enable kip4 feature) when the KIP will be merged and fork will be enabled.

[5chdn]

KIP 4 will be activated on Kovan block 9_200_000, please finalize and merge spec.