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#ifndef LIGHTNING_COMMON_CRYPTOMSG_H
#define LIGHTNING_COMMON_CRYPTOMSG_H
#include "config.h"
#include <ccan/short_types/short_types.h>
#include <ccan/tal/tal.h>
#include <common/crypto_state.h>
/* BOLT #8:
*
* ### Receiving and Decrypting Messages
*
* In order to decrypt the _next_ message in the network stream, the
* following steps are completed:
*
* 1. Read _exactly_ 18 bytes from the network buffer.
*/
#define CRYPTOMSG_HDR_SIZE 18
/* BOLT #8:
*
* 4. Read _exactly_ `l+16` bytes from the network buffer
*/
#define CRYPTOMSG_BODY_OVERHEAD 16
/* Low-level functions for sync comms: doesn't discard unknowns! */
u8 *cryptomsg_encrypt_msg(const tal_t *ctx,
struct crypto_state *cs,
const u8 *msg);
bool cryptomsg_decrypt_header(struct crypto_state *cs, u8 hdr[18], u16 *lenp);
u8 *cryptomsg_decrypt_body(const tal_t *ctx,
struct crypto_state *cs, const u8 *in);
#endif /* LIGHTNING_COMMON_CRYPTOMSG_H */