硬分叉，没什么可怕：

Check_Block_Version

// check block version validity at specific height according to current network

Get_HF_info

// this function returns  number of information whether hf is going on scheduled, everything is okay etc

Get_Current_Version

// current hard fork version , block major version
// we may be at genesis block height

Get_Current_Version_at_Height

Get_Ideal_Version

// if we are voting, return the next expected version

Get_Ideal_Version_at_Height

// used to cast vote