Function wallet_can_spend

wallet/wallet.c:636–677

}

bool wallet_can_spend(struct wallet *w, const u8 *script,
		      u32 *index, bool *output_is_p2sh)
{
	struct ext_key ext;
	u64 bip32_max_index = db_get_intvar(w->db, "bip32_max_index", 0);
	u32 i;

	/* If not one of these, can't be for us. */
	if (is_p2sh(script, NULL))
		*output_is_p2sh = true;
	else if (is_p2wpkh(script, NULL))
		*output_is_p2sh = false;
	else
		return false;

	for (i = 0; i <= bip32_max_index + w->keyscan_gap; i++) {
		u8 *s;

		if (bip32_key_from_parent(w->bip32_base, i,
					  BIP32_FLAG_KEY_PUBLIC, &ext)
		    != WALLY_OK) {
			abort();
		}
		s = scriptpubkey_p2wpkh_derkey(w, ext.pub_key);
		if (*output_is_p2sh) {
			u8 *p2sh = scriptpubkey_p2sh(w, s);
			tal_free(s);
			s = p2sh;
		}
		if (scripteq(s, script)) {
			/* If we found a used key in the keyscan_gap we should
			 * remember that. */
			if (i > bip32_max_index)
				db_set_intvar(w->db, "bip32_max_index", i);
			tal_free(s);
			*index = i;
			return true;
		}
		tal_free(s);
	}
	return false;
}

s64 wallet_get_newindex(struct lightningd *ld)
{