#ifndef LIGHTNING_PKT_H
#define LIGHTNING_PKT_H
/* Simple (non-threadsafe!) wrapper for protobufs.
 *
 * This could be a simple set of macros, if the protobuf-c people hadn't
 * insisted on "prettifing" the names they generate into CamelCase.
 */
#include <ccan/endian/endian.h>
#include <ccan/short_types/short_types.h>
#include <ccan/tal/tal.h>
#include "lightning.pb-c.h"

/* A packet, ready to be de-protobuf'ed. */
struct pkt {
	le32 len;
	u8 data[];
};

/* Utility helper: dies if there's a problem. */
Pkt *pkt_from_file(const char *filename, Pkt__PktCase expect);
Pkt *any_pkt_from_file(const char *filename);

/* Total length of packet, including header. */
size_t pkt_totlen(const struct pkt *pkt);

struct sha256;
struct sha256_double;
struct bitcoin_compressed_pubkey;
struct signature;
struct pubkey;

/**
 * openchannel_pkt - create an openchannel message
 * @ctx: tal context to allocate off.
 * @revocation_hash: first hash value generated from seed.
 * @commit: the pubkey for commit transactions.
 * @final: the pubkey for the commit transactions' output and escape input.
 * @commitment_fee: the fee to use for commitment tx.
 * @rel_locktime_seconds: relative seconds for commitment locktime.
 * @anchor_txid: the anchor transaction ID.
 * @anchor_amount: the anchor amount.
 * @escape_hash: the hash whose preimage will revoke our escape txs.
 * @escape_fee: the fee for escape txs.
 * @min_confirms: how many confirms we want on anchor.
 */
struct pkt *openchannel_pkt(const tal_t *ctx,
			    const struct sha256 *revocation_hash,
			    const struct pubkey *commit,
			    const struct pubkey *final,
			    u64 commitment_fee,
			    u32 rel_locktime_seconds,
			    u64 anchor_amount,
			    const struct sha256 *escape_hash,
			    u64 escape_fee,
			    u32 min_confirms);

/**
 * open_anchor_pkt - create an open_anchor_sig message
 * @ctx: tal context to allocate off.
 * @txid: the anchor's txid
 * @index: the anchor's output to spend.
 */
struct pkt *open_anchor_pkt(const tal_t *ctx,
			    const struct sha256_double *txid, u32 index);

/**
 * open_commit_sig_pkt - create an open_commit_sig message
 * @ctx: tal context to allocate off.
 * @sigs: two signatures for the commit transaction inputs
 */
struct pkt *open_commit_sig_pkt(const tal_t *ctx,
				const struct signature *sigs);

/**
 * open_complete_pkt - create an open_complete message
 * @ctx: tal context to allocate off.
 * @escape_preimage: preimage to revoke escape transactions.
 */
struct pkt *open_complete_pkt(const tal_t *ctx,
			      const struct sha256 *escape_preimage);

/**
 * close_channel_pkt - create an close_channel message
 * @ctx: tal context to allocate off.
 * @sigs: two signatures for the close transaction inputs
 */
struct pkt *close_channel_pkt(const tal_t *ctx,
			      const struct signature *sigs);

/**
 * close_channel_complete_pkt - create an close_channel_complete message
 * @ctx: tal context to allocate off.
 * @sigs: two signatures for the close transaction inputs
 */
struct pkt *close_channel_complete_pkt(const tal_t *ctx,
				       const struct signature *sigs);


/**
 * update_pkt - create an update message
 * @ctx: tal context to allocate off.
 * @revocation_hash: the revocation hash for the next tx.
 * @delta: the change in satoshis (to me).
 */
struct pkt *update_pkt(const tal_t *ctx,
		       const struct sha256 *revocation_hash,
		       s64 delta);

/**
 * update_accept_pkt - create an update_accept message
 * @ctx: tal context to allocate off.
 * @sigs: two signatures for the commit transaction inputs
 * @revocation_hash: hash to revoke the next tx.
 */
struct pkt *update_accept_pkt(const tal_t *ctx,
			      const struct signature *sigs,
			      const struct sha256 *revocation_hash);

/**
 * update_signature_pkt - create an update_signature message
 * @ctx: tal context to allocate off.
 * @sigs: two signatures for the commit transaction inputs
 * @revocation_preimage: preimage to revoke existing (now-obsolete) tx.
 */
struct pkt *update_signature_pkt(const tal_t *ctx,
				 const struct signature *sigs,
				 const struct sha256 *revocation_preimage);
/**
 * update_complete_pkt - create an update_accept message
 * @ctx: tal context to allocate off.
 * @revocation_preimage: preimage to revoke existing (now-obsolete) tx.
 */
struct pkt *update_complete_pkt(const tal_t *ctx,
				const struct sha256 *revocation_preimage);

#endif /* LIGHTNING_PKT_H */