+
+/// Encrypt TLV payload to be used as a [`crate::blinded_path::BlindedHop::encrypted_payload`].
+pub(super) fn encrypt_payload<P: Writeable>(payload: P, encrypted_tlvs_ss: [u8; 32]) -> Vec<u8> {
+ let mut writer = VecWriter(Vec::new());
+ let write_adapter = ChaChaPolyWriteAdapter::new(encrypted_tlvs_ss, &payload);
+ write_adapter.write(&mut writer).expect("In-memory writes cannot fail");
+ writer.0
+}
+
+/// Blinded path encrypted payloads may be padded to ensure they are equal length.
+///
+/// Reads padding to the end, ignoring what's read.
+pub(crate) struct Padding {}
+impl Readable for Padding {
+ #[inline]
+ fn read<R: io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
+ loop {
+ let mut buf = [0; 8192];
+ if reader.read(&mut buf[..])? == 0 { break; }
+ }
+ Ok(Self {})
+ }
+}