Compatibility with `CreateX` `salt` scheme

[pcaversaccio]

Background

CreateX is now live on 56 EVM chains (see also createx.rocks). TL;DR: CreateX is a factory smart contract to make easier and safer usage of the CREATE and CREATE2 EVM opcodes as well as of CREATE3-based (i.e. without an initcode factor) contract creations.

CreateX salt scheme

The full documentation can be viewed here.

CreateX implements some special features:

1. Permissioned Deploy Protection
2. Cross-Chain Redeploy Protection

The salt value implements these different safeguarding mechanisms depending on the encoded values in the salt (|| stands for byte-wise concatenation):

=> salt (32 bytes) = 0xbebebebebebebebebebebebebebebebebebebebe||ff||1212121212121212121212

• The first 20 bytes (i.e. bebebebebebebebebebebebebebebebebebebebe) may be used to implement a permissioned deploy protection by setting them equal to msg.sender,
• The 21st byte (i.e. ff) may be used to implement a cross-chain redeploy protection by setting it equal to 0x01,
• The last random 11 bytes (i.e. 1212121212121212121212) allow for $2^{88}$ bits of entropy for mining a salt.

Feature Request

Make ERADICATE2 compatible with CreateX's salt scheme. Cc: @mds1 @Vectorized

[pcaversaccio]

See createXcrunch for a dedicated CreateX cruncher implementation.