Ruby: How do I pass all parameters and blocks received by one method to another?

You can use * and & in method calls to turn arrays back into lists of arguments and procs back into blocks. So you can just do this:

def myhelper(*args, &block)
  link_to(*args, &block)
  # your code
end

def method(...)

Starting from Ruby 2.7 it is possible to pass all the arguments of the current method to the other method using (...).

So, now,

def my_helper(*args, &block)
  link_to(*args, &block)
  
  # your code
end

can be rewritten as

def my_helper(...)
  link_to(...)

  # your code
end

Here is the link to the feature request.