Merge pull request #644 from joemphilips/improve_error_message

Improve error message.

diff --cc lightning/src/ln/peer_channel_encryptor.rs
index 111c86ecae30a6afba8c8d61f1fae9ef72bea40c,68f3c505b9beabf342b2938784f92f63537650ee..bbc074e0fd82e638549b2dadc7eb0627efe84dbd
--- 1/lightning/src/ln/peer_channel_encryptor.rs
--- 2/lightning/src/ln/peer_channel_encryptor.rs
+++ b/lightning/src/ln/peer_channel_encryptor.rs
@@@ -11,12 -11,8 +11,13 @@@ use bitcoin::secp256k1
  
  use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
  use util::byte_utils;
+ use bitcoin::hashes::hex::ToHex;
  
 +/// Maximum Lightning message data length according to
 +/// [BOLT-8](https://github.com/lightningnetwork/lightning-rfc/blob/v1.0/08-transport.md#lightning-message-specification)
 +/// and [BOLT-1](https://github.com/lightningnetwork/lightning-rfc/blob/master/01-messaging.md#lightning-message-format):
 +pub const LN_MAX_MSG_LEN: usize = ::std::u16::MAX as usize; // Must be equal to 65535
 +
  // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
  const NOISE_CK: [u8; 32] = [0x26, 0x40, 0xf5, 0x2e, 0xeb, 0xcd, 0x9e, 0x88, 0x29, 0x58, 0x95, 0x1c, 0x79, 0x42, 0x50, 0xee, 0xdb, 0x28, 0x00, 0x2c, 0x05, 0xd7, 0xdc, 0x2e, 0xa0, 0xf1, 0x95, 0x40, 0x60, 0x42, 0xca, 0xf1];
  // Sha256(NOISE_CK || "lightning")