diff --git a/examples/drivers/windows/include/otLwfIoctl.h b/examples/drivers/windows/include/otLwfIoctl.h
index 4a139a45d..daa207f06 100644
--- a/examples/drivers/windows/include/otLwfIoctl.h
+++ b/examples/drivers/windows/include/otLwfIoctl.h
@@ -200,7 +200,7 @@ typedef enum _OTLWF_NOTIF_TYPE
 #define IOCTL_OTLWF_OT_EXTENDED_ADDRESS \
     OTLWF_CTL_CODE(107, METHOD_BUFFERED, FILE_READ_DATA | FILE_WRITE_DATA)
     // GUID - InterfaceGuid
-    // otExtAddress - aExtendedAddress
+    // otExtAddress - aExtAddress
 
 #define IOCTL_OTLWF_OT_EXTENDED_PANID \
     OTLWF_CTL_CODE(108, METHOD_BUFFERED, FILE_READ_DATA | FILE_WRITE_DATA)
diff --git a/examples/drivers/windows/otApi/otApi.cpp b/examples/drivers/windows/otApi/otApi.cpp
index 5aabd2529..7d7675e02 100644
--- a/examples/drivers/windows/otApi/otApi.cpp
+++ b/examples/drivers/windows/otApi/otApi.cpp
@@ -1476,7 +1476,7 @@ otThreadSetChildTimeout(
 
 OTAPI 
 const 
-uint8_t *
+otExtAddress *
 OTCALL
 otLinkGetExtendedAddress(
     _In_ otInstance *aInstance
@@ -1490,7 +1490,7 @@ otLinkGetExtendedAddress(
         free(Result);
         Result = nullptr;
     }
-    return (uint8_t*)Result;
+    return Result;
 }
 
 OTAPI 
@@ -1498,11 +1498,11 @@ otError
 OTCALL
 otLinkSetExtendedAddress(
     _In_ otInstance *aInstance, 
-    const otExtAddress *aExtendedAddress
+    const otExtAddress *aExtAddress
     )
 {
     if (aInstance == nullptr) return OT_ERROR_INVALID_ARGS;
-    return DwordToThreadError(SetIOCTL(aInstance, IOCTL_OTLWF_OT_EXTENDED_ADDRESS, aExtendedAddress));
+    return DwordToThreadError(SetIOCTL(aInstance, IOCTL_OTLWF_OT_EXTENDED_ADDRESS, aExtAddress));
 }
 
 OTAPI 
diff --git a/examples/drivers/windows/otLwf/radio.c b/examples/drivers/windows/otLwf/radio.c
index 78c26591a..eaf6f4dcc 100644
--- a/examples/drivers/windows/otLwf/radio.c
+++ b/examples/drivers/windows/otLwf/radio.c
@@ -210,7 +210,7 @@ void otPlatRadioSetPanId(_In_ otInstance *otCtx, uint16_t panid)
     }
 }
 
-void otPlatRadioSetExtendedAddress(_In_ otInstance *otCtx, uint8_t *address)
+void otPlatRadioSetExtendedAddress(_In_ otInstance *otCtx, const otExtAddress *address)
 {
     NT_ASSERT(otCtx);
     PMS_FILTER pFilter = otCtxToFilter(otCtx);
@@ -223,7 +223,7 @@ void otPlatRadioSetExtendedAddress(_In_ otInstance *otCtx, uint8_t *address)
 
     for (size_t i = 0; i < OT_EXT_ADDRESS_SIZE; i++)
     {
-        extAddr.bytes[i] = address[7 - i];
+        extAddr.bytes[i] = address->m8[7 - i];
     }
 
     // Indicate to the miniport
@@ -654,7 +654,7 @@ otError otPlatRadioAddSrcMatchShortEntry(_In_ otInstance *otCtx, const uint16_t
     return NT_SUCCESS(status) ? OT_ERROR_NONE : OT_ERROR_FAILED;
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(_In_ otInstance *otCtx, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(_In_ otInstance *otCtx, const otExtAddress *aExtAddress)
 {
     NT_ASSERT(otCtx);
     PMS_FILTER pFilter = otCtxToFilter(otCtx);
@@ -696,7 +696,7 @@ otError otPlatRadioClearSrcMatchShortEntry(_In_ otInstance *otCtx, const uint16_
     return NT_SUCCESS(status) ? OT_ERROR_NONE : OT_ERROR_FAILED;
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(_In_ otInstance *otCtx, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(_In_ otInstance *otCtx, const otExtAddress *aExtAddress)
 {
     NT_ASSERT(otCtx);
     PMS_FILTER pFilter = otCtxToFilter(otCtx);
diff --git a/examples/drivers/windows/otLwf/tunnel.c b/examples/drivers/windows/otLwf/tunnel.c
index 770f635ae..e28178d51 100644
--- a/examples/drivers/windows/otLwf/tunnel.c
+++ b/examples/drivers/windows/otLwf/tunnel.c
@@ -596,7 +596,7 @@ otLwfTunValueInserted(
             NotifEntry->Notif.NotifType = OTLWF_NOTIF_ACTIVE_SCAN;
             NotifEntry->Notif.ActiveScanPayload.Valid = TRUE;
 
-            const uint8_t *aExtAddr = NULL;
+            const otExtAddress *aExtAddr = NULL;
             const uint8_t *aExtPanId = NULL;
             const char *aNetworkName = NULL;
             unsigned int xpanid_len = 0;
diff --git a/examples/drivers/windows/otNodeApi/otNodeApi.cpp b/examples/drivers/windows/otNodeApi/otNodeApi.cpp
index 48168ebc5..74707941d 100644
--- a/examples/drivers/windows/otNodeApi/otNodeApi.cpp
+++ b/examples/drivers/windows/otNodeApi/otNodeApi.cpp
@@ -1172,7 +1172,7 @@ OTNODEAPI const char* OTCALL otNodeGetAddr64(otNode* aNode)
     {
         aNode->mMemoryToFree.push_back(str);
         for (int i = 0; i < 8; i++)
-            sprintf_s(str + i * 2, 18 - (2 * i), "%02x", extAddr[i]);
+            sprintf_s(str + i * 2, 18 - (2 * i), "%02x", extAddr->m8[i]);
         printf("%d: extaddr\r\n%s\r\n", aNode->mId, str);
     }
     otFreeMemory(extAddr);
diff --git a/examples/platforms/cc2538/radio.c b/examples/platforms/cc2538/radio.c
index a0138fa19..8ac87975c 100644
--- a/examples/platforms/cc2538/radio.c
+++ b/examples/platforms/cc2538/radio.c
@@ -209,17 +209,17 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t aPanid)
     HWREG(RFCORE_FFSM_PAN_ID1) = aPanid >> 8;
 }
 
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aAddress)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aAddress)
 {
     (void)aInstance;
 
     otLogInfoPlat(sInstance, "ExtAddr=%X%X%X%X%X%X%X%X",
-                  aAddress[7], aAddress[6], aAddress[5], aAddress[4], aAddress[3],
-                  aAddress[2], aAddress[1], aAddress[0]);
+                  aAddress->m8[7], aAddress->m8[6], aAddress->m8[5], aAddress->m8[4],
+                  aAddress->m8[3], aAddress->m8[2], aAddress->m8[1], aAddress->m8[0]);
 
     for (int i = 0; i < 8; i++)
     {
-        ((volatile uint32_t *)RFCORE_FFSM_EXT_ADDR0)[i] = aAddress[i];
+        ((volatile uint32_t *)RFCORE_FFSM_EXT_ADDR0)[i] = aAddress->m8[i];
     }
 }
 
@@ -593,7 +593,7 @@ int8_t findSrcMatchShortEntry(const uint16_t aShortAddress)
     return entry;
 }
 
-int8_t findSrcMatchExtEntry(const uint8_t *aExtAddress)
+int8_t findSrcMatchExtEntry(const otExtAddress *aExtAddress)
 {
     int8_t entry = -1;
     uint32_t bitMask;
@@ -614,7 +614,7 @@ int8_t findSrcMatchExtEntry(const uint8_t *aExtAddress)
 
         for (j = 0; j < sizeof(otExtAddress); j++)
         {
-            if (HWREG(addr + j) != aExtAddress[j])
+            if (HWREG(addr + j) != aExtAddress->m8[j])
             {
                 break;
             }
@@ -746,7 +746,7 @@ exit:
     return error;
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
     int8_t entry = findSrcMatchAvailEntry(false);
@@ -761,7 +761,7 @@ otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aEx
 
     for (uint8_t i = 0; i < sizeof(otExtAddress); i++)
     {
-        HWREG(addr++) = aExtAddress[i];
+        HWREG(addr++) = aExtAddress->m8[i];
     }
 
     setSrcMatchEntryEnableStatus(false, (uint8_t)(entry), true);
@@ -786,7 +786,7 @@ exit:
     return error;
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
     int8_t entry = findSrcMatchExtEntry(aExtAddress);
diff --git a/examples/platforms/cc2650/radio.c b/examples/platforms/cc2650/radio.c
index fd4a2589d..5d51004f3 100644
--- a/examples/platforms/cc2650/radio.c
+++ b/examples/platforms/cc2650/radio.c
@@ -1468,7 +1468,7 @@ exit:
 /**
  * Function documented in platform/radio.h
  */
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
     (void)aInstance;
@@ -1501,7 +1501,7 @@ exit:
 /**
  * Function documented in platform/radio.h
  */
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
     (void)aInstance;
@@ -1696,7 +1696,7 @@ exit:
  * @note it is entirely possible for this function to fail, but there is no
  * valid way to return that error since the funciton prototype was changed.
  */
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aAddress)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aAddress)
 {
     (void)aInstance;
 
diff --git a/examples/platforms/cc2652/radio.c b/examples/platforms/cc2652/radio.c
index c6c7aa0a1..c87f3ae46 100644
--- a/examples/platforms/cc2652/radio.c
+++ b/examples/platforms/cc2652/radio.c
@@ -1465,7 +1465,7 @@ exit:
 /**
  * Function documented in platform/radio.h
  */
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
     (void)aInstance;
@@ -1498,7 +1498,7 @@ exit:
 /**
  * Function documented in platform/radio.h
  */
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
     (void)aInstance;
@@ -1694,7 +1694,7 @@ exit:
  * @note it is entirely possible for this function to fail, but there is no
  * valid way to return that error since the function prototype was changed.
  */
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aAddress)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aAddress)
 {
     (void)aInstance;
 
diff --git a/examples/platforms/da15000/radio.c b/examples/platforms/da15000/radio.c
index 9b8fc8554..daeefeebd 100644
--- a/examples/platforms/da15000/radio.c
+++ b/examples/platforms/da15000/radio.c
@@ -155,15 +155,15 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t aPanid)
     FTDF_setValue(FTDF_PIB_PAN_ID, &aPanid);
 }
 
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aAddress)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aAddress)
 {
     (void)aInstance;
 
     otLogInfoPlat(sInstance, "Set Extended Address: %X%X%X%X%X%X%X%X",
-                  aAddress[7], aAddress[6], aAddress[5], aAddress[4],
-                  aAddress[3], aAddress[2], aAddress[1], aAddress[0]);
+                  aAddress->m8[7], aAddress->m8[6], aAddress->m8[5], aAddress->m8[4],
+                  aAddress->m8[3], aAddress->m8[2], aAddress->m8[1], aAddress->m8[0]);
 
-    FTDF_setValue(FTDF_PIB_EXTENDED_ADDRESS, aAddress);
+    FTDF_setValue(FTDF_PIB_EXTENDED_ADDRESS, aAddress->m8);
 }
 
 void otPlatRadioSetShortAddress(otInstance *aInstance, uint16_t aAddress)
@@ -311,7 +311,7 @@ exit:
 
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
 
@@ -320,8 +320,10 @@ otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aEx
     uint32_t addrL;
     uint64_t addrH;
 
-    addrL = (aExtAddress[3] << 24) | (aExtAddress[2] << 16) | (aExtAddress[1] << 8) | (aExtAddress[0] << 0);
-    addrH = (aExtAddress[7] << 24) | (aExtAddress[6] << 16) | (aExtAddress[5] << 8) | (aExtAddress[4] << 0);
+    addrL = (aExtAddress->m8[3] << 24) | (aExtAddress->m8[2] << 16) |
+            (aExtAddress->m8[1] << 8) | (aExtAddress->m8[0] << 0);
+    addrH = (aExtAddress->m8[7] << 24) | (aExtAddress->m8[6] << 16) |
+            (aExtAddress->m8[5] << 8) | (aExtAddress->m8[4] << 0);
     addr = addrL | (addrH << 32);
 
     // check if address already stored
@@ -357,7 +359,7 @@ exit:
     return error;
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
 
@@ -366,8 +368,10 @@ otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *a
     uint32_t addrL;
     uint64_t addrH;
 
-    addrL = (aExtAddress[3] << 24) | (aExtAddress[2] << 16) | (aExtAddress[1] << 8) | (aExtAddress[0] << 0);
-    addrH = (aExtAddress[7] << 24) | (aExtAddress[6] << 16) | (aExtAddress[5] << 8) | (aExtAddress[4] << 0);
+    addrL = (aExtAddress->m8[3] << 24) | (aExtAddress->m8[2] << 16) |
+            (aExtAddress->m8[1] << 8) | (aExtAddress->m8[0] << 0);
+    addrH = (aExtAddress->m8[7] << 24) | (aExtAddress->m8[6] << 16) |
+            (aExtAddress->m8[5] << 8) | (aExtAddress->m8[4] << 0);
     addr = addrL | (addrH << 32);
 
     otError error = OT_ERROR_NONE;
diff --git a/examples/platforms/efr32/radio.c b/examples/platforms/efr32/radio.c
index 847ff1cd6..8369e3a6d 100644
--- a/examples/platforms/efr32/radio.c
+++ b/examples/platforms/efr32/radio.c
@@ -201,15 +201,15 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t aPanId)
     RAIL_IEEE802154_SetPanId(aPanId);
 }
 
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aAddress)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aAddress)
 {
     (void)aInstance;
 
     otLogInfoPlat(sInstance, "ExtAddr=%X%X%X%X%X%X%X%X",
-                  aAddress[7], aAddress[6], aAddress[5], aAddress[4],
-                  aAddress[3], aAddress[2], aAddress[1], aAddress[0]);
+                  aAddress->m8[7], aAddress->m8[6], aAddress->m8[5], aAddress->m8[4],
+                  aAddress->m8[3], aAddress->m8[2], aAddress->m8[1], aAddress->m8[0]);
 
-    RAIL_IEEE802154_SetLongAddress(aAddress);
+    RAIL_IEEE802154_SetLongAddress(aAddress->m8);
 }
 
 void otPlatRadioSetShortAddress(otInstance *aInstance, uint16_t aAddress)
@@ -433,15 +433,15 @@ int8_t findSrcMatchShortEntry(const uint16_t aShortAddress)
     return entry;
 }
 
-int8_t findSrcMatchExtEntry(const uint8_t *aExtAddress)
+int8_t findSrcMatchExtEntry(const otExtAddress *aExtAddress)
 {
     int8_t entry = -1;
     uint16_t checksum = sPanId;
 
-    checksum += (uint16_t)aExtAddress[0] | (uint16_t)(aExtAddress[1] << 8);
-    checksum += (uint16_t)aExtAddress[2] | (uint16_t)(aExtAddress[3] << 8);
-    checksum += (uint16_t)aExtAddress[4] | (uint16_t)(aExtAddress[5] << 8);
-    checksum += (uint16_t)aExtAddress[6] | (uint16_t)(aExtAddress[7] << 8);
+    checksum += (uint16_t)aExtAddress->m8[0] | (uint16_t)(aExtAddress->m8[1] << 8);
+    checksum += (uint16_t)aExtAddress->m8[2] | (uint16_t)(aExtAddress->m8[3] << 8);
+    checksum += (uint16_t)aExtAddress->m8[4] | (uint16_t)(aExtAddress->m8[5] << 8);
+    checksum += (uint16_t)aExtAddress->m8[6] | (uint16_t)(aExtAddress->m8[7] << 8);
 
     for (uint8_t i = 0; i < RADIO_CONFIG_SRC_MATCH_EXT_ENTRY_NUM; i++)
     {
@@ -464,14 +464,14 @@ void addToSrcMatchShortIndirect(uint8_t entry, const uint16_t aShortAddress)
     srcMatchShortEntry[entry].allocated = true;
 }
 
-void addToSrcMatchExtIndirect(uint8_t entry, const uint8_t *aExtAddress)
+void addToSrcMatchExtIndirect(uint8_t entry, const otExtAddress *aExtAddress)
 {
     uint16_t checksum = sPanId;
 
-    checksum += (uint16_t)aExtAddress[0] | (uint16_t)(aExtAddress[1] << 8);
-    checksum += (uint16_t)aExtAddress[2] | (uint16_t)(aExtAddress[3] << 8);
-    checksum += (uint16_t)aExtAddress[4] | (uint16_t)(aExtAddress[5] << 8);
-    checksum += (uint16_t)aExtAddress[6] | (uint16_t)(aExtAddress[7] << 8);
+    checksum += (uint16_t)aExtAddress->m8[0] | (uint16_t)(aExtAddress->m8[1] << 8);
+    checksum += (uint16_t)aExtAddress->m8[2] | (uint16_t)(aExtAddress->m8[3] << 8);
+    checksum += (uint16_t)aExtAddress->m8[4] | (uint16_t)(aExtAddress->m8[5] << 8);
+    checksum += (uint16_t)aExtAddress->m8[6] | (uint16_t)(aExtAddress->m8[7] << 8);
 
     srcMatchExtEntry[entry].checksum = checksum;
     srcMatchExtEntry[entry].allocated = true;
@@ -524,7 +524,7 @@ exit:
     return error;
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
     int8_t entry = -1;
@@ -568,7 +568,7 @@ exit:
     return error;
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
     int8_t entry = -1;
diff --git a/examples/platforms/emsk/radio.c b/examples/platforms/emsk/radio.c
index ee95ff8e6..047f55af7 100644
--- a/examples/platforms/emsk/radio.c
+++ b/examples/platforms/emsk/radio.c
@@ -243,10 +243,10 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t panid)
     mrf24j40_set_pan(pan);
 }
 
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *address)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *address)
 {
     (void)aInstance;
-    mrf24j40_set_eui(address);
+    mrf24j40_set_eui(address->m8);
 }
 
 void otPlatRadioSetShortAddress(otInstance *aInstance, uint16_t address)
@@ -633,7 +633,7 @@ otError otPlatRadioAddSrcMatchShortEntry(otInstance *aInstance, const uint16_t a
     return OT_ERROR_NONE;
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
     (void)aExtAddress;
@@ -647,7 +647,7 @@ otError otPlatRadioClearSrcMatchShortEntry(otInstance *aInstance, const uint16_t
     return OT_ERROR_NONE;
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
     (void)aExtAddress;
diff --git a/examples/platforms/gp712/radio.c b/examples/platforms/gp712/radio.c
index c5327914b..1bc040ef3 100644
--- a/examples/platforms/gp712/radio.c
+++ b/examples/platforms/gp712/radio.c
@@ -96,10 +96,10 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t panid)
     otCachedSettings.panid = panid;
 }
 
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *address)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *address)
 {
     (void)aInstance;
-    qorvoRadioSetExtendedAddress(address);
+    qorvoRadioSetExtendedAddress(address->m8);
 }
 
 void otPlatRadioSetShortAddress(otInstance *aInstance, uint16_t address)
@@ -268,10 +268,10 @@ otError otPlatRadioAddSrcMatchShortEntry(otInstance *aInstance, const uint16_t a
     return qorvoRadioAddSrcMatchShortEntry(aShortAddress, otCachedSettings.panid);
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
-    return qorvoRadioAddSrcMatchExtEntry(aExtAddress, otCachedSettings.panid);
+    return qorvoRadioAddSrcMatchExtEntry(aExtAddress->m8, otCachedSettings.panid);
 }
 
 otError otPlatRadioClearSrcMatchShortEntry(otInstance *aInstance, const uint16_t aShortAddress)
@@ -280,10 +280,10 @@ otError otPlatRadioClearSrcMatchShortEntry(otInstance *aInstance, const uint16_t
     return qorvoRadioClearSrcMatchShortEntry(aShortAddress, otCachedSettings.panid);
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
-    return qorvoRadioClearSrcMatchExtEntry(aExtAddress, otCachedSettings.panid);
+    return qorvoRadioClearSrcMatchExtEntry(aExtAddress->m8, otCachedSettings.panid);
 }
 
 void otPlatRadioClearSrcMatchShortEntries(otInstance *aInstance)
diff --git a/examples/platforms/kw41z/radio.c b/examples/platforms/kw41z/radio.c
index 06e077b71..8effe74e8 100644
--- a/examples/platforms/kw41z/radio.c
+++ b/examples/platforms/kw41z/radio.c
@@ -151,14 +151,14 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t aPanId)
     ZLL->MACSHORTADDRS0 |= ZLL_MACSHORTADDRS0_MACPANID0(aPanId);
 }
 
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aExtendedAddress)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void) aInstance;
     uint32_t addrLo;
     uint32_t addrHi;
 
-    memcpy(&addrLo, aExtendedAddress, sizeof(addrLo));
-    memcpy(&addrHi, aExtendedAddress + sizeof(addrLo), sizeof(addrHi));
+    memcpy(&addrLo, aExtAddress->m8, sizeof(addrLo));
+    memcpy(&addrHi, aExtAddress->m8 + sizeof(addrLo), sizeof(addrHi));
 
     ZLL->MACLONGADDRS0_LSB = addrLo;
     ZLL->MACLONGADDRS0_MSB = addrHi;
@@ -272,10 +272,10 @@ otError otPlatRadioAddSrcMatchShortEntry(otInstance *aInstance, const uint16_t a
     return rf_add_addr_table_entry(checksum, false);
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void) aInstance;
-    uint16_t checksum = rf_get_addr_checksum((uint8_t *)aExtAddress, true, sPanId);
+    uint16_t checksum = rf_get_addr_checksum((uint8_t *)aExtAddress->m8, true, sPanId);
 
     return rf_add_addr_table_entry(checksum, true);
 }
@@ -288,10 +288,10 @@ otError otPlatRadioClearSrcMatchShortEntry(otInstance *aInstance, const uint16_t
     return rf_remove_addr_table_entry(checksum);
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void) aInstance;
-    uint16_t checksum = rf_get_addr_checksum((uint8_t *)aExtAddress, true, sPanId);
+    uint16_t checksum = rf_get_addr_checksum((uint8_t *)aExtAddress->m8, true, sPanId);
 
     return rf_remove_addr_table_entry(checksum);
 }
diff --git a/examples/platforms/nrf52840/radio.c b/examples/platforms/nrf52840/radio.c
index 8b08dafb3..40a53b4cb 100644
--- a/examples/platforms/nrf52840/radio.c
+++ b/examples/platforms/nrf52840/radio.c
@@ -194,11 +194,11 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t aPanId)
     nrf_drv_radio802154_pan_id_set(address);
 }
 
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aExtendedAddress)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void) aInstance;
 
-    nrf_drv_radio802154_extended_address_set(aExtendedAddress);
+    nrf_drv_radio802154_extended_address_set(aExtAddress->m8);
 }
 
 void otPlatRadioSetShortAddress(otInstance *aInstance, uint16_t aShortAddress)
@@ -405,13 +405,13 @@ otError otPlatRadioAddSrcMatchShortEntry(otInstance *aInstance, const uint16_t a
     return error;
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void) aInstance;
 
     otError error;
 
-    if (nrf_drv_radio802154_pending_bit_for_addr_set(aExtAddress, true))
+    if (nrf_drv_radio802154_pending_bit_for_addr_set(aExtAddress->m8, true))
     {
         error = OT_ERROR_NONE;
     }
@@ -444,13 +444,13 @@ otError otPlatRadioClearSrcMatchShortEntry(otInstance *aInstance, const uint16_t
     return error;
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void) aInstance;
 
     otError error;
 
-    if (nrf_drv_radio802154_pending_bit_for_addr_clear(aExtAddress, true))
+    if (nrf_drv_radio802154_pending_bit_for_addr_clear(aExtAddress->m8, true))
     {
         error = OT_ERROR_NONE;
     }
diff --git a/examples/platforms/posix/radio.c b/examples/platforms/posix/radio.c
index 49f704c86..482025b2c 100644
--- a/examples/platforms/posix/radio.c
+++ b/examples/platforms/posix/radio.c
@@ -311,13 +311,13 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t panid)
     sPanid = panid;
 }
 
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *address)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
 
     for (size_t i = 0; i < sizeof(sExtendedAddress); i++)
     {
-        sExtendedAddress[i] = address[sizeof(sExtendedAddress) - 1 - i];
+        sExtendedAddress[i] = aExtAddress->m8[sizeof(sExtendedAddress) - 1 - i];
     }
 }
 
@@ -719,7 +719,7 @@ otError otPlatRadioAddSrcMatchShortEntry(otInstance *aInstance, const uint16_t a
     return OT_ERROR_NONE;
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
     (void)aExtAddress;
@@ -733,7 +733,7 @@ otError otPlatRadioClearSrcMatchShortEntry(otInstance *aInstance, const uint16_t
     return OT_ERROR_NONE;
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
     (void)aExtAddress;
diff --git a/include/openthread/link.h b/include/openthread/link.h
index 1a16a8dc3..753e3de83 100644
--- a/include/openthread/link.h
+++ b/include/openthread/link.h
@@ -186,22 +186,22 @@ OTAPI otError OTCALL otLinkSetChannel(otInstance *aInstance, uint8_t aChannel);
  *
  * @returns A pointer to the IEEE 802.15.4 Extended Address.
  */
-OTAPI const uint8_t *OTCALL otLinkGetExtendedAddress(otInstance *aInstance);
+OTAPI const otExtAddress *OTCALL otLinkGetExtendedAddress(otInstance *aInstance);
 
 /**
  * This function sets the IEEE 802.15.4 Extended Address.
  *
  * This function will only succeed when Thread protocols are disabled.
  *
- * @param[in]  aInstance         A pointer to an OpenThread instance.
- * @param[in]  aExtendedAddress  A pointer to the IEEE 802.15.4 Extended Address.
+ * @param[in]  aInstance    A pointer to an OpenThread instance.
+ * @param[in]  aExtAddress  A pointer to the IEEE 802.15.4 Extended Address.
  *
  * @retval OT_ERROR_NONE           Successfully set the IEEE 802.15.4 Extended Address.
- * @retval OT_ERROR_INVALID_ARGS   @p aExtendedAddress was NULL.
+ * @retval OT_ERROR_INVALID_ARGS   @p aExtAddress was NULL.
  * @retval OT_ERROR_INVALID_STATE  Thread protocols are enabled.
  *
  */
-OTAPI otError OTCALL otLinkSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtendedAddress);
+OTAPI otError OTCALL otLinkSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtAddress);
 
 /**
  * Get the factory-assigned IEEE EUI-64.
diff --git a/include/openthread/link_raw.h b/include/openthread/link_raw.h
index 89e7b8e98..03464fc67 100644
--- a/include/openthread/link_raw.h
+++ b/include/openthread/link_raw.h
@@ -90,14 +90,14 @@ otError otLinkRawSetPanId(otInstance *aInstance, uint16_t aPanId);
 /**
  * This function sets the IEEE 802.15.4 Extended Address.
  *
- * @param[in]  aInstance         A pointer to an OpenThread instance.
- * @param[in]  aExtendedAddress  A pointer to the IEEE 802.15.4 Extended Address.
+ * @param[in]  aInstance    A pointer to an OpenThread instance.
+ * @param[in]  aExtAddress  A pointer to the IEEE 802.15.4 Extended Address.
  *
  * @retval OT_ERROR_NONE             If successful.
  * @retval OT_ERROR_INVALID_STATE    If the raw link-layer isn't enabled.
  *
  */
-otError otLinkRawSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtendedAddress);
+otError otLinkRawSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtAddress);
 
 /**
  * Set the Short Address for address filtering.
@@ -303,7 +303,7 @@ otError otLinkRawSrcMatchAddShortEntry(otInstance *aInstance, const uint16_t aSh
  * @retval OT_ERROR_INVALID_STATE    If the raw link-layer isn't enabled.
  *
  */
-otError otLinkRawSrcMatchAddExtEntry(otInstance *aInstance, const uint8_t *aExtAddress);
+otError otLinkRawSrcMatchAddExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress);
 
 /**
  * Removing short address to the source match table.
@@ -329,7 +329,7 @@ otError otLinkRawSrcMatchClearShortEntry(otInstance *aInstance, const uint16_t a
  * @retval OT_ERROR_INVALID_STATE    If the raw link-layer isn't enabled.
  *
  */
-otError otLinkRawSrcMatchClearExtEntry(otInstance *aInstance, const uint8_t *aExtAddress);
+otError otLinkRawSrcMatchClearExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress);
 
 /**
  * Removing all the short addresses from the source match table.
diff --git a/include/openthread/platform/radio.h b/include/openthread/platform/radio.h
index ce5cca252..0af620710 100644
--- a/include/openthread/platform/radio.h
+++ b/include/openthread/platform/radio.h
@@ -174,11 +174,12 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t aPanId);
 /**
  * Set the Extended Address for address filtering.
  *
- * @param[in] aInstance         The OpenThread instance structure.
- * @param[in] aExtendedAddress  A pointer to the IEEE 802.15.4 Extended Address.
+ * @param[in] aInstance    The OpenThread instance structure.
+ * @param[in] aExtAddress  A pointer to the IEEE 802.15.4 Extended Address stored in little-endian byte order.
+ *
  *
  */
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aExtendedAddress);
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtAddress);
 
 /**
  * Set the Short Address for address filtering.
@@ -304,12 +305,12 @@ otError otPlatRadioAddSrcMatchShortEntry(otInstance *aInstance, const uint16_t a
  * Add an extended address to the source address match table.
  *
  * @param[in]  aInstance    The OpenThread instance structure.
- * @param[in]  aExtAddress  The extended address to be added.
+ * @param[in]  aExtAddress  The extended address to be added stored in little-endian byte order.
  *
  * @retval OT_ERROR_NONE      Successfully added extended address to the source match table.
  * @retval OT_ERROR_NO_BUFS   No available entry in the source match table.
  */
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress);
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress);
 
 /**
  * Remove a short address from the source address match table.
@@ -326,12 +327,12 @@ otError otPlatRadioClearSrcMatchShortEntry(otInstance *aInstance, const uint16_t
  * Remove an extended address from the source address match table.
  *
  * @param[in]  aInstance    The OpenThread instance structure.
- * @param[in]  aExtAddress  The extended address to be removed.
+ * @param[in]  aExtAddress  The extended address to be removed stoerd in little-endian byte order.
  *
  * @retval OT_ERROR_NONE        Successfully removed the extended address from the source match table.
  * @retval OT_ERROR_NO_ADDRESS  The extended address is not in source address match table.
  */
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress);
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress);
 
 /**
  * Clear all short addresses from the source address match table.
diff --git a/src/cli/cli.cpp b/src/cli/cli.cpp
index d6443a231..064fda62e 100644
--- a/src/cli/cli.cpp
+++ b/src/cli/cli.cpp
@@ -881,7 +881,7 @@ void Interpreter::ProcessExtAddress(int argc, char *argv[])
 
     if (argc == 0)
     {
-        otBufferPtr extAddress(otLinkGetExtendedAddress(mInstance));
+        otBufferPtr extAddress(reinterpret_cast<const uint8_t *>(otLinkGetExtendedAddress(mInstance)));
         OutputBytes(extAddress, OT_EXT_ADDRESS_SIZE);
         mServer->OutputFormat("\r\n");
     }
diff --git a/src/core/api/link_api.cpp b/src/core/api/link_api.cpp
index baa718c33..2c2fb4bd0 100644
--- a/src/core/api/link_api.cpp
+++ b/src/core/api/link_api.cpp
@@ -62,9 +62,9 @@ exit:
     return error;
 }
 
-const uint8_t *otLinkGetExtendedAddress(otInstance *aInstance)
+const otExtAddress *otLinkGetExtendedAddress(otInstance *aInstance)
 {
-    return reinterpret_cast<const uint8_t *>(aInstance->mThreadNetif.GetMac().GetExtAddress());
+    return reinterpret_cast<const otExtAddress *>(aInstance->mThreadNetif.GetMac().GetExtAddress());
 }
 
 otError otLinkSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtAddress)
diff --git a/src/core/api/link_raw_api.cpp b/src/core/api/link_raw_api.cpp
index 0b388ec28..f244f7ff2 100644
--- a/src/core/api/link_raw_api.cpp
+++ b/src/core/api/link_raw_api.cpp
@@ -72,19 +72,19 @@ exit:
     return error;
 }
 
-otError otLinkRawSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtendedAddress)
+otError otLinkRawSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
-    uint8_t buf[sizeof(otExtAddress)];
+    otExtAddress address;
 
     VerifyOrExit(aInstance->mLinkRaw.IsEnabled(), error = OT_ERROR_INVALID_STATE);
 
-    for (size_t i = 0; i < sizeof(buf); i++)
+    for (size_t i = 0; i < sizeof(address); i++)
     {
-        buf[i] = aExtendedAddress->m8[7 - i];
+        address.m8[i] = aExtAddress->m8[7 - i];
     }
 
-    otPlatRadioSetExtendedAddress(aInstance, buf);
+    otPlatRadioSetExtendedAddress(aInstance, &address);
 
 exit:
     return error;
@@ -199,7 +199,7 @@ exit:
     return error;
 }
 
-otError otLinkRawSrcMatchAddExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otLinkRawSrcMatchAddExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
 
@@ -223,7 +223,7 @@ exit:
     return error;
 }
 
-otError otLinkRawSrcMatchClearExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otLinkRawSrcMatchClearExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     otError error = OT_ERROR_NONE;
 
diff --git a/src/core/mac/mac.cpp b/src/core/mac/mac.cpp
index e01e38900..6e34303f8 100644
--- a/src/core/mac/mac.cpp
+++ b/src/core/mac/mac.cpp
@@ -464,16 +464,16 @@ void Mac::GenerateExtAddress(ExtAddress *aExtAddress)
 
 void Mac::SetExtAddress(const ExtAddress &aExtAddress)
 {
-    uint8_t buf[sizeof(aExtAddress)];
+    otExtAddress address;
 
     otLogFuncEntry();
 
-    for (size_t i = 0; i < sizeof(buf); i++)
+    for (size_t i = 0; i < sizeof(address); i++)
     {
-        buf[i] = aExtAddress.m8[7 - i];
+        address.m8[i] = aExtAddress.m8[7 - i];
     }
 
-    otPlatRadioSetExtendedAddress(&GetInstance(), buf);
+    otPlatRadioSetExtendedAddress(&GetInstance(), &address);
     mExtAddress = aExtAddress;
 
     otLogFuncExit();
diff --git a/src/core/thread/src_match_controller.cpp b/src/core/thread/src_match_controller.cpp
index 3f755fd5a..be409223c 100644
--- a/src/core/thread/src_match_controller.cpp
+++ b/src/core/thread/src_match_controller.cpp
@@ -153,17 +153,17 @@ otError SourceMatchController::AddAddress(const Child &aChild)
     }
     else
     {
-        uint8_t addr[sizeof(aChild.GetExtAddress())];
+        otExtAddress addr;
 
         for (uint8_t i = 0; i < sizeof(addr); i++)
         {
-            addr[i] = aChild.GetExtAddress().m8[sizeof(addr) - 1 - i];
+            addr.m8[i] = aChild.GetExtAddress().m8[sizeof(addr) - 1 - i];
         }
 
-        error = otPlatRadioAddSrcMatchExtEntry(&GetInstance(), addr);
+        error = otPlatRadioAddSrcMatchExtEntry(&GetInstance(), &addr);
 
         otLogDebgMac(GetInstance(), "SrcAddrMatch - Adding addr: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x -- %s (%d)",
-                     addr[7], addr[6], addr[5], addr[4], addr[3], addr[2], addr[1], addr[0],
+                     addr.m8[7], addr.m8[6], addr.m8[5], addr.m8[4], addr.m8[3], addr.m8[2], addr.m8[1], addr.m8[0],
                      otThreadErrorToString(error), error);
     }
 
@@ -190,17 +190,17 @@ void SourceMatchController::ClearEntry(Child &aChild)
     }
     else
     {
-        uint8_t addr[sizeof(aChild.GetExtAddress())];
+        otExtAddress addr;
 
         for (uint8_t i = 0; i < sizeof(addr); i++)
         {
-            addr[i] = aChild.GetExtAddress().m8[sizeof(aChild.GetExtAddress()) - 1 - i];
+            addr.m8[i] = aChild.GetExtAddress().m8[sizeof(aChild.GetExtAddress()) - 1 - i];
         }
 
-        error = otPlatRadioClearSrcMatchExtEntry(&GetInstance(), addr);
+        error = otPlatRadioClearSrcMatchExtEntry(&GetInstance(), &addr);
 
         otLogDebgMac(GetInstance(), "SrcAddrMatch - Clearing addr: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x -- %s (%d)",
-                     addr[7], addr[6], addr[5], addr[4], addr[3], addr[2], addr[1], addr[0],
+                     addr.m8[7], addr.m8[6], addr.m8[5], addr.m8[4], addr.m8[3], addr.m8[2], addr.m8[1], addr.m8[0],
                      otThreadErrorToString(error), error);
     }
 
diff --git a/src/ncp/ncp_base.cpp b/src/ncp/ncp_base.cpp
index d97d48823..25eee16fe 100644
--- a/src/ncp/ncp_base.cpp
+++ b/src/ncp/ncp_base.cpp
@@ -6346,7 +6346,7 @@ otError NcpBase::SetPropertyHandler_MAC_SRC_MATCH_EXTENDED_ADDRESSES(uint8_t aHe
     while (dataLen >= sizeof(otExtAddress))
     {
         spinel_ssize_t parsedLength;
-        uint8_t *extAddress;
+        otExtAddress *extAddress;
 
         parsedLength = spinel_datatype_unpack(
                            data,
@@ -7003,7 +7003,7 @@ otError NcpBase::InsertPropertyHandler_MAC_SRC_MATCH_EXTENDED_ADDRESSES(uint8_t
     spinel_ssize_t parsedLength;
     otError error = OT_ERROR_NONE;
     spinel_status_t spinelError = SPINEL_STATUS_OK;
-    uint8_t *extAddress = NULL;
+    otExtAddress *extAddress = NULL;
 
     parsedLength = spinel_datatype_unpack(
                        aValuePtr,
@@ -7604,7 +7604,7 @@ otError NcpBase::RemovePropertyHandler_MAC_SRC_MATCH_EXTENDED_ADDRESSES(uint8_t
     spinel_ssize_t parsedLength;
     otError error = OT_ERROR_NONE;
     spinel_status_t spinelError = SPINEL_STATUS_OK;
-    uint8_t *extAddress;
+    otExtAddress *extAddress;
 
     parsedLength = spinel_datatype_unpack(
                        aValuePtr,
diff --git a/tests/fuzz/fuzzer_platform.c b/tests/fuzz/fuzzer_platform.c
index a52cb3837..23427876e 100644
--- a/tests/fuzz/fuzzer_platform.c
+++ b/tests/fuzz/fuzzer_platform.c
@@ -84,7 +84,7 @@ void otPlatRadioSetPanId(otInstance *aInstance, uint16_t aPanId)
     (void)aPanId;
 }
 
-void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aExtAddr)
+void otPlatRadioSetExtendedAddress(otInstance *aInstance, otExtAddress *aExtAddr)
 {
     (void)aInstance;
     (void)aExtAddr;
@@ -177,7 +177,7 @@ otError otPlatRadioAddSrcMatchShortEntry(otInstance *aInstance, const uint16_t a
     return OT_ERROR_NONE;
 }
 
-otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
     (void)aExtAddress;
@@ -191,7 +191,7 @@ otError otPlatRadioClearSrcMatchShortEntry(otInstance *aInstance, const uint16_t
     return OT_ERROR_NONE;
 }
 
-otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
 {
     (void)aInstance;
     (void)aExtAddress;
diff --git a/tests/unit/test_platform.cpp b/tests/unit/test_platform.cpp
index 651396bbc..22ba019bc 100644
--- a/tests/unit/test_platform.cpp
+++ b/tests/unit/test_platform.cpp
@@ -190,7 +190,7 @@ extern "C" {
         }
     }
 
-    void otPlatRadioSetExtendedAddress(otInstance *aInstance, uint8_t *aExtAddr)
+    void otPlatRadioSetExtendedAddress(otInstance *aInstance, const otExtAddress *aExtAddr)
     {
         if (g_testPlatRadioSetExtendedAddress)
         {
@@ -317,7 +317,7 @@ extern "C" {
         return OT_ERROR_NONE;
     }
 
-    otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+    otError otPlatRadioAddSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
     {
         (void)aInstance;
         (void)aExtAddress;
@@ -331,7 +331,7 @@ extern "C" {
         return OT_ERROR_NONE;
     }
 
-    otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const uint8_t *aExtAddress)
+    otError otPlatRadioClearSrcMatchExtEntry(otInstance *aInstance, const otExtAddress *aExtAddress)
     {
         (void)aInstance;
         (void)aExtAddress;
diff --git a/tests/unit/test_platform.h b/tests/unit/test_platform.h
index 99fea4d8f..992fe9035 100644
--- a/tests/unit/test_platform.h
+++ b/tests/unit/test_platform.h
@@ -68,7 +68,7 @@ extern testPlatAlarmGetNow              g_testPlatAlarmGetNow;
 //
 
 typedef void (*testPlatRadioSetPanId)(otInstance *, uint16_t);
-typedef void (*testPlatRadioSetExtendedAddress)(otInstance *, uint8_t *);
+typedef void (*testPlatRadioSetExtendedAddress)(otInstance *, const otExtAddress *);
 typedef void (*testPlatRadioSetShortAddress)(otInstance *, uint16_t);
 
 typedef bool(*testPlatRadioIsEnabled)(otInstance *);