add dedicated method performing loading and filtering of false positives from coinjoins

Scripts/cj_analysis.py

@@ -937,3 +937,18 @@ def sort_coinjoins(cjtxs: dict, sort_by_order: bool = False):
                    for cjtxid in cjtxs.keys()]
         sorted_cj_time = sorted(cj_time, key=lambda x: x['broadcast_time'])
         return sorted_cj_time
+
+
+def load_coinjoins_from_file(target_load_path: str, filter_false_positives: bool) -> dict:
+    logging.info(f'Loading {target_load_path}/coinjoin_tx_info.json ...')
+    data = load_json_from_file(os.path.join(target_load_path, f'coinjoin_tx_info.json'))
+
+    # Filter false positives if required
+    if filter_false_positives:
+        fp_file = os.path.join(target_load_path, 'false_cjtxs.json')
+        false_cjtxs = load_json_from_file(fp_file)
+        for false_tx in false_cjtxs:
+            if false_tx in data['coinjoins'].keys():
+                data['coinjoins'].pop(false_tx)
+
+    return data