Function derive_to_remote

tools/lightning-hsmtool.c:454–479

}

static void derive_to_remote(const struct unilateral_close_info *info, const char *hsm_secret_path)
{
	struct secret hsm_secret, channel_seed, basepoint_secret;
	struct pubkey basepoint;
	struct privkey privkey;

	secp256k1_ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY
						 | SECP256K1_CONTEXT_SIGN);

	struct hsm_secret *hsms = load_hsm_secret(tmpctx, hsm_secret_path);
	/* Copy first 32 bytes of secret_data to the local secret struct */
	memcpy(hsm_secret.data, hsms->secret_data, sizeof(hsm_secret.data));
	get_channel_seed(&channel_seed, &info->peer_id, info->channel_id, &hsm_secret);
	if (!derive_payment_basepoint(&channel_seed, &basepoint, &basepoint_secret))
		errx(ERROR_KEYDERIV, "Could not derive basepoints for dbid %"PRIu64
				     " and channel seed %s.", info->channel_id,
				     fmt_secret(tmpctx, &channel_seed));
	if (!info->commitment_point)
		privkey.secret = basepoint_secret;
	else if (!derive_simple_privkey(&basepoint_secret, &basepoint, info->commitment_point, &privkey))
		errx(ERROR_KEYDERIV, "Could not derive simple privkey for dbid %"PRIu64
				     ", channel seed %s, and commitment point %s.", info->channel_id,
				     fmt_secret(tmpctx, &channel_seed),
				     fmt_pubkey(tmpctx, info->commitment_point));
	printf("privkey : %s\n", fmt_secret(tmpctx, &privkey.secret));
}

static void dumponchaindescriptors(const char *hsm_secret_path,
				   const u32 version, bool show_secrets)