CommonFun.calcBuff_7830
function CommonFun.calcBuff_7830(srcUser, targetUser, a, b, c, d, lv)
  if srcUser == nil or targetUser == nil then
    return 0
  end
  local skilllv = srcUser:GetLernedSkillLevel(a)
  local A = c
  if b <= skilllv then
    A = d
  end
  return A
end