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64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
#ifndef LIGHTNING_BITCOIN_PUBKEY_H
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#define LIGHTNING_BITCOIN_PUBKEY_H
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#include "config.h"
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#include <ccan/crypto/ripemd160/ripemd160.h>
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#include <ccan/crypto/sha256/sha256.h>
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#include <ccan/short_types/short_types.h>
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#include <ccan/structeq/structeq.h>
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#include <ccan/tal/tal.h>
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#include <secp256k1.h>
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struct privkey;
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struct secret;
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#define PUBKEY_CMPR_LEN 33
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struct pubkey {
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/* Unpacked pubkey (as used by libsecp256k1 internally) */
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secp256k1_pubkey pubkey;
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};
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/* Define pubkey_eq (no padding) */
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STRUCTEQ_DEF(pubkey, 0, pubkey.data);
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/* Convert from hex string of DER (scriptPubKey from validateaddress) */
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bool pubkey_from_hexstr(const char *derstr, size_t derlen, struct pubkey *key);
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/* Convert from hex string of DER (scriptPubKey from validateaddress) */
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char *pubkey_to_hexstr(const tal_t *ctx, const struct pubkey *key);
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/* Convenience wrapper for a raw secp256k1_pubkey */
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char *secp256k1_pubkey_to_hexstr(const tal_t *ctx, const secp256k1_pubkey *key);
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/* Point from secret */
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bool pubkey_from_secret(const struct secret *secret, struct pubkey *key);
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/* Pubkey from privkey */
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bool pubkey_from_privkey(const struct privkey *privkey,
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struct pubkey *key);
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/* Pubkey from DER encoding. */
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bool pubkey_from_der(const u8 *der, size_t len, struct pubkey *key);
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/* Pubkey to DER encoding: must be valid pubkey. */
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void pubkey_to_der(u8 der[PUBKEY_CMPR_LEN], const struct pubkey *key);
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/* Compare the keys `a` and `b`. Return <0 if `a`<`b`, 0 if equal and >0 otherwise */
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int pubkey_cmp(const struct pubkey *a, const struct pubkey *b);
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/* If the two nodes[] are id1 and id2, which index would id1 be? */
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static inline int pubkey_idx(const struct pubkey *id1, const struct pubkey *id2)
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{
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return pubkey_cmp(id1, id2) > 0;
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}
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/**
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* pubkey_to_hash160 - Get the hash for p2pkh payments for a given pubkey
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*/
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void pubkey_to_hash160(const struct pubkey *pk, struct ripemd160 *hash);
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/* marshal/unmarshal functions */
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void towire_pubkey(u8 **pptr, const struct pubkey *pubkey);
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void fromwire_pubkey(const u8 **cursor, size_t *max, struct pubkey *pubkey);
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#endif /* LIGHTNING_BITCOIN_PUBKEY_H */
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