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#ifndef LIGHTNING_BITCOIN_SIGNATURE_H
#define LIGHTNING_BITCOIN_SIGNATURE_H
#include "config.h"
#include <ccan/short_types/short_types.h>
#include <secp256k1.h>
#include <stdbool.h>
struct sha256_double;
struct bitcoin_tx;
struct pubkey;
struct privkey;
struct bitcoin_tx_output;
enum sighash_type {
SIGHASH_ALL = 1,
SIGHASH_NONE = 2,
SIGHASH_SINGLE = 3,
SIGHASH_ANYONECANPAY = 0x80
};
void sign_hash(const struct privkey *p,
const struct sha256_double *h,
secp256k1_ecdsa_signature *s);
bool check_signed_hash(const struct sha256_double *hash,
const secp256k1_ecdsa_signature *signature,
const struct pubkey *key);
/* All tx input scripts must be set to 0 len. */
void sign_tx_input(struct bitcoin_tx *tx,
unsigned int in,
const u8 *subscript,
const u8 *witness,
const struct privkey *privkey, const struct pubkey *pubkey,
secp256k1_ecdsa_signature *sig);
/* Does this sig sign the tx with this input for this pubkey. */
bool check_tx_sig(struct bitcoin_tx *tx, size_t input_num,
const u8 *redeemscript,
const u8 *witness,
const struct pubkey *key,
const secp256k1_ecdsa_signature *sig);
/* Give DER encoding of signature: returns length used (<= 72). */
size_t signature_to_der(u8 der[72], const secp256k1_ecdsa_signature *s);
/* Parse DER encoding into signature sig */
bool signature_from_der(const u8 *der, size_t len, secp256k1_ecdsa_signature *sig);
#endif /* LIGHTNING_BITCOIN_SIGNATURE_H */