feat(ble): Show the name of a successful pairing

Helps to figure out what is happening and which file just got written to the file system. A later incarnation might try to read some more interesting information from the peer and present that.

epicardium/ble/ble_main.c

@@ -224,6 +224,7 @@ wsfHandlerId_t bleHandlerId;
 
 static dmConnId_t pair_connId = DM_CONN_ID_NONE;
 static uint32_t pair_confirm_value;
+static appDbHdl_t last_pairing = NULL;
 
 static void BleHandler(wsfEventMask_t event, wsfMsgHdr_t *pMsg);
 
@@ -578,6 +579,15 @@ uint32_t epic_ble_get_compare_value(void)
 	return pair_confirm_value;
 }
 
+int epic_ble_get_last_pairing_name(char *buf, size_t buf_size)
+{
+	if(last_pairing == NULL) {
+		return -ENOENT;
+	}
+
+	return AppDbGetPairingName(last_pairing, buf, buf_size);
+}
+
 void epic_ble_compare_response(bool confirmed)
 {
 	if(!active) {
@@ -765,7 +775,8 @@ static void bleProcMsg(bleMsg_t *pMsg)
                pMsg->dm.pairCmpl.auth);
 
       DmSecGenerateEccKeyReq();
-      AppDbNvmStoreBond(AppDbGetHdl((dmConnId_t) pMsg->hdr.param));
+      last_pairing = AppDbGetHdl((dmConnId_t) pMsg->hdr.param);
+      AppDbNvmStoreBond(last_pairing);
 
       pair_connId = DM_CONN_ID_NONE;
       trigger_event(BLE_EVENT_PAIRING_COMPLETE);