core-lightning/bitcoin/pubkey.h

#ifndef LIGHTNING_BITCOIN_PUBKEY_H
#define LIGHTNING_BITCOIN_PUBKEY_H
#include "config.h"
#include <ccan/short_types/short_types.h>
#include <ccan/tal/tal.h>
#include <secp256k1.h>

struct privkey;

#define PUBKEY_DER_LEN 33

struct pubkey {
	/* Unpacked pubkey (as used by libsecp256k1 internally) */
	secp256k1_pubkey pubkey;
};

/* Convert from hex string of DER (scriptPubKey from validateaddress) */
bool pubkey_from_hexstr(secp256k1_context *secpctx,
			const char *derstr, size_t derlen, struct pubkey *key);

/* Convert from hex string of DER (scriptPubKey from validateaddress) */
char *pubkey_to_hexstr(const tal_t *ctx, secp256k1_context *secpctx,
		       const struct pubkey *key);

/* Pubkey from privkey */
bool pubkey_from_privkey(secp256k1_context *secpctx,
			 const struct privkey *privkey,
			 struct pubkey *key,
			 unsigned int compressed_flags);

/* Pubkey from DER encoding. */
bool pubkey_from_der(secp256k1_context *secpctx,
		     const u8 *der, size_t len, struct pubkey *key);

/* Pubkey to DER encoding: must be valid pubkey. */
void pubkey_to_der(secp256k1_context *secpctx, u8 der[PUBKEY_DER_LEN],
		   const struct pubkey *key);

/* Are these keys equal? */
bool pubkey_eq(const struct pubkey *a, const struct pubkey *b);
#endif /* LIGHTNING_PUBKEY_H */