Foo.cairo

%lang starknet

from starkware.cairo.common.cairo_builtins import HashBuiltin
from starkware.starknet.common.syscalls import get_caller_address


@view
func get_caller {
    pedersen_ptr: HashBuiltin*,
    range_check_ptr,
    syscall_ptr: felt*
  } () -> (address: felt):
    let (address) = get_caller_address()
    return (address)
end