[BREAKING] Remove NimBLEAddress type default value.

When constructing a NimBLEAddress via string or other non `ble_addr_t` parameters it is important that the address type be specified.
This will help prevent issues where applications are not able to connect or identify scanned devices when comparing their addresses.

src/NimBLEAddress.cpp

@@ -45,7 +45,9 @@ NimBLEAddress::NimBLEAddress(ble_addr_t address) : ble_addr_t{address} {}
  * ```
  * which is 17 characters in length.
  * @param [in] addr The hex string representation of the address.
- * @param [in] type The type of the address.
+ * @param [in] type The type of the address, should be one of:
+ * * BLE_ADDR_PUBLIC (0)
+ * * BLE_ADDR_RANDOM (1)
  */
 NimBLEAddress::NimBLEAddress(const std::string& addr, uint8_t type) {
     this->type = type;
@@ -70,7 +72,9 @@ NimBLEAddress::NimBLEAddress(const std::string& addr, uint8_t type) {
 /**
  * @brief Constructor for compatibility with bluedroid esp library using native ESP representation.
  * @param [in] address A uint8_t[6] or esp_bd_addr_t containing the address.
- * @param [in] type The type of the address.
+ * @param [in] type The type of the address should be one of:
+ * * BLE_ADDR_PUBLIC (0)
+ * * BLE_ADDR_RANDOM (1)
  */
 NimBLEAddress::NimBLEAddress(const uint8_t address[BLE_DEV_ADDR_LEN], uint8_t type) {
     std::reverse_copy(address, address + BLE_DEV_ADDR_LEN, this->val);
@@ -81,7 +85,9 @@ NimBLEAddress::NimBLEAddress(const uint8_t address[BLE_DEV_ADDR_LEN], uint8_t ty
  * @brief Constructor for address using a hex value.\n
  * Use the same byte order, so use 0xa4c1385def16 for "a4:c1:38:5d:ef:16"
  * @param [in] address uint64_t containing the address.
- * @param [in] type The type of the address.
+ * @param [in] type The type of the address should be one of:
+ * * BLE_ADDR_PUBLIC (0)
+ * * BLE_ADDR_RANDOM (1)
  */
 NimBLEAddress::NimBLEAddress(const uint64_t& address, uint8_t type) {
     memcpy(this->val, &address, sizeof this->val);

src/NimBLEAddress.h

@@ -34,9 +34,9 @@
 # include <string>
 
 /**
- * @brief A %BLE device address.
+ * @brief A BLE device address.
  *
- * Every %BLE device has a unique address which can be used to identify it and form connections.
+ * Every BLE device has a unique address which can be used to identify it and form connections.
  */
 class NimBLEAddress : private ble_addr_t {
   public:
@@ -45,9 +45,9 @@ class NimBLEAddress : private ble_addr_t {
      */
     NimBLEAddress() = default;
     NimBLEAddress(const ble_addr_t address);
-    NimBLEAddress(const uint8_t address[BLE_DEV_ADDR_LEN], uint8_t type = BLE_ADDR_PUBLIC);
-    NimBLEAddress(const std::string& stringAddress, uint8_t type = BLE_ADDR_PUBLIC);
-    NimBLEAddress(const uint64_t& address, uint8_t type = BLE_ADDR_PUBLIC);
+    NimBLEAddress(const uint8_t address[BLE_DEV_ADDR_LEN], uint8_t type);
+    NimBLEAddress(const std::string& stringAddress, uint8_t type);
+    NimBLEAddress(const uint64_t& address, uint8_t type);
 
     bool                 isRpa() const;
     bool                 isNrpa() const;

src/NimBLEDevice.cpp

@@ -614,18 +614,14 @@ bool NimBLEDevice::isBonded(const NimBLEAddress& address) {
 /**
  * @brief Get the address of a bonded peer device by index.
  * @param [in] index The index to retrieve the peer address of.
- * @returns NimBLEAddress of the found bonded peer or nullptr if not found.
+ * @returns NimBLEAddress of the found bonded peer or null address if not found.
  */
 NimBLEAddress NimBLEDevice::getBondedAddress(int index) {
     ble_addr_t peer_id_addrs[MYNEWT_VAL(BLE_STORE_MAX_BONDS)];
     int        num_peers, rc;
     rc = ble_store_util_bonded_peers(&peer_id_addrs[0], &num_peers, MYNEWT_VAL(BLE_STORE_MAX_BONDS));
-    if (rc != 0) {
-        return nullptr;
-    }
-
-    if (index > num_peers || index < 0) {
-        return nullptr;
+    if (rc != 0 || index > num_peers || index < 0) {
+        return NimBLEAddress{};
     }
 
     return NimBLEAddress(peer_id_addrs[index]);
@@ -704,12 +700,12 @@ size_t NimBLEDevice::getWhiteListCount() {
 /**
  * @brief Gets the address at the vector index.
  * @param [in] index The vector index to retrieve the address from.
- * @returns The NimBLEAddress at the whitelist index or nullptr if not found.
+ * @returns The NimBLEAddress at the whitelist index or null address if not found.
  */
 NimBLEAddress NimBLEDevice::getWhiteListAddress(size_t index) {
     if (index > m_whiteList.size()) {
         NIMBLE_LOGE(LOG_TAG, "Invalid index; %u", index);
-        return nullptr;
+        return NimBLEAddress{};
     }
 
     return m_whiteList[index];