message: Clarify size_factor comment
diff: @@ -16,9 +16,10 @@ use crate::wasm_backend::{compile_and_use, compile_only, make_runtime_store};
  const WASM_DIR: &str = "wasm";
  const MODULES_DIR: &str = "modules";
  -// Rounded-up average of Module size to optimized wasm size ratio
  -// Based on `examples/module_size.sh`, and the (optimized) cosmwasm-plus modules
  -const OPTIMIZED_WASM_SIZE_FACTOR: usize = 18;
  +// Upper bound of Module size to optimized wasm size ratio.
  +// Based on `examples/module_size.sh`, and the (optimized) cosmwasm-plus modules,
  +// where we observed up to 18.4597. Need to assume an attacker could find a higher factor.
  +const OPTIMIZED_WASM_SIZE_FACTOR: usize = 20;
  #[derive(Debug, Default, Clone, Copy)]
  pub struct Stats {
  