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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/bootloader/dfu/nrf_dfu_validation.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/bootloader/dfu/nrf_dfu_validation.h
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index 0000000..d0de004
--- /dev/null
+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/bootloader/dfu/nrf_dfu_validation.h
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+/**
+ * Copyright (c) 2017 - 2018, Nordic Semiconductor ASA
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ * 
+ * 2. Redistributions in binary form, except as embedded into a Nordic
+ *    Semiconductor ASA integrated circuit in a product or a software update for
+ *    such product, must reproduce the above copyright notice, this list of
+ *    conditions and the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 
+ * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ * 
+ * 4. This software, with or without modification, must only be used with a
+ *    Nordic Semiconductor ASA integrated circuit.
+ * 
+ * 5. Any software provided in binary form under this license must not be reverse
+ *    engineered, decompiled, modified and/or disassembled.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+ * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ */
+/**@file
+ *
+ * @defgroup sdk_nrf_dfu_validation Validation
+ * @{
+ * @ingroup  nrf_dfu
+ */
+ 
+#ifndef __NRF_DFU_VALIDATION_H
+#define __NRF_DFU_VALIDATION_H
+
+#include "stdint.h"
+#include "sdk_errors.h"
+#include "nrf_dfu_handling_error.h"
+
+/**
+ * @brief Function for module initialization.
+ *
+ * Function checks if there is a valid init packet in DFU settings written in flash.
+ */
+void nrf_dfu_validation_init(void);
+
+/**
+ * @brief Function called on reception of init command creation request.
+ *
+ * @param[in] size Size of incoming init packet.
+ *
+ * @return       Operation result. See @ref nrf_dfu_result_t
+ */
+nrf_dfu_result_t nrf_dfu_validation_init_cmd_create(uint32_t size);
+
+/**
+ * @brief Function called on reception of fragment of init command.
+ *
+ * @param[in] p_data Init command fragment.
+ * @param[in] length Init command fragment size.
+ *
+ * @return       Operation result. See @ref nrf_dfu_result_t
+ */
+nrf_dfu_result_t nrf_dfu_validation_init_cmd_append(uint8_t const * p_data, uint32_t length);
+
+/**
+ * @brief Function for getting init command status.
+ *
+ * @param[out] p_offset   Current offset.
+ * @param[out] p_crc      Current CRC.
+ * @param[out] p_max_size Maximum size of init command.
+ */
+void nrf_dfu_validation_init_cmd_status_get(uint32_t * p_offset,
+                                            uint32_t * p_crc,
+                                            uint32_t * p_max_size);
+
+/**
+ * @brief Function for inquiring whether a valid init command has been received.
+ *
+ * @return true  if there is a valid init command. This can be true at boot time
+ *               if the device was reset during a DFU operation.
+ */
+bool nrf_dfu_validation_init_cmd_present(void);
+
+/**
+ * @brief Function for validating init command.
+ *
+ * If init command is successfully validated Bank 1 details are written to out parameters.
+ *
+ * Until @ref nrf_dfu_validation_init_cmd_create is called, this function can be called
+ * again after the first time without side effects to retrieve address and length.
+ *
+ * @param[out] p_dst_data_addr Bank 1 start address if validation is successful.
+ * @param[out] p_data_len  Bank 1 length if validation is successful.
+ *
+ * @return       Operation result. See @ref nrf_dfu_result_t
+ */
+nrf_dfu_result_t nrf_dfu_validation_init_cmd_execute(uint32_t * p_dst_data_addr,
+                                                     uint32_t * p_data_len);
+
+/**
+ * @brief Function for postvalidating the update. Function is called once all data is received.
+ *
+ * @param[in] dst_data_addr Bank 1 start address.
+ * @param[in] data_len      Bank 1 length.
+ *
+ * @return       Operation result. See @ref nrf_dfu_result_t
+ */
+nrf_dfu_result_t nrf_dfu_validation_post_data_execute(uint32_t dst_data_addr, uint32_t data_len);
+
+#endif //__NRF_DFU_VALIDATION_H
+
+/** @} */