State operations

# Environmental Ops
BALANCE = 0x31
EXTCODESIZE = 0x3B
EXTCODECOPY = 0x3C
EXTCODEHASH = 0x3F

# Storage Ops
SLOAD = 0x54
SSTORE = 0x55

# System Operations
CREATE = 0xF0
CALL = 0xF1
CALLCODE = 0xF2
DELEGATECALL = 0xF4
CREATE2 = 0xF5
STATICCALL = 0xFA
SELFDESTRUCT = 0xFF