forked from Qortal/qortal
9e2663b11b
NullAccount has 'empty' public key (32 bytes of zeros) compared with GenesisAccount's vague sometimes 8 bytes, sometimes 32 bytes public key. NullAccount has static public key and address, plus overridden methods to speed up pointless calls like verify(). Genesis Block also tidied up, dropping old Qora v1 compatibility and using proper block signature and public key to generate minter's block signature. Genesis Block transaction processing also simplified, with no need to access repository to handle fake references, due to new last-reference code (which will need to be merged). Dropped support for old, broken RMD160 code.