diff --git a/.gitignore b/.gitignore
index 210a6c8..e129bfc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,6 @@
 .ipynb_checkpoints/
 /examples/stats/.ipynb_checkpoints
 /.cache/
+.idea
+/__pycache__/
+
diff --git a/.idea/.name b/.idea/.name
deleted file mode 100644
index 2666df7..0000000
--- a/.idea/.name
+++ /dev/null
@@ -1 +0,0 @@
-py-etherscan-api
\ No newline at end of file
diff --git a/.idea/dbnavigator.xml b/.idea/dbnavigator.xml
deleted file mode 100644
index 792a196..0000000
--- a/.idea/dbnavigator.xml
+++ /dev/null
@@ -1,445 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="DBNavigator.Project.DataEditorManager">
-    <record-view-column-sorting-type value="BY_INDEX" />
-    <value-preview-text-wrapping value="true" />
-    <value-preview-pinned value="false" />
-  </component>
-  <component name="DBNavigator.Project.DataExportManager">
-    <export-instructions>
-      <create-header value="true" />
-      <quote-values-containing-separator value="true" />
-      <quote-all-values value="false" />
-      <value-separator value="" />
-      <file-name value="" />
-      <file-location value="" />
-      <scope value="GLOBAL" />
-      <destination value="FILE" />
-      <format value="EXCEL" />
-      <charset value="UTF-8" />
-    </export-instructions>
-  </component>
-  <component name="DBNavigator.Project.DatabaseBrowserManager">
-    <autoscroll-to-editor value="false" />
-    <autoscroll-from-editor value="true" />
-    <show-object-properties value="true" />
-    <loaded-nodes />
-  </component>
-  <component name="DBNavigator.Project.EditorStateManager">
-    <last-used-providers />
-  </component>
-  <component name="DBNavigator.Project.MethodExecutionManager">
-    <method-browser />
-    <execution-history>
-      <group-entries value="true" />
-      <execution-inputs />
-    </execution-history>
-    <argument-values-cache />
-  </component>
-  <component name="DBNavigator.Project.ObjectDependencyManager">
-    <last-used-dependency-type value="INCOMING" />
-  </component>
-  <component name="DBNavigator.Project.ObjectQuickFilterManager">
-    <last-used-operator value="EQUAL" />
-    <filters />
-  </component>
-  <component name="DBNavigator.Project.ScriptExecutionManager" clear-outputs="true">
-    <recently-used-interfaces />
-  </component>
-  <component name="DBNavigator.Project.Settings">
-    <connections />
-    <browser-settings>
-      <general>
-        <display-mode value="TABBED" />
-        <navigation-history-size value="100" />
-        <show-object-details value="false" />
-      </general>
-      <filters>
-        <object-type-filter>
-          <object-type name="SCHEMA" enabled="true" />
-          <object-type name="USER" enabled="true" />
-          <object-type name="ROLE" enabled="true" />
-          <object-type name="PRIVILEGE" enabled="true" />
-          <object-type name="CHARSET" enabled="true" />
-          <object-type name="TABLE" enabled="true" />
-          <object-type name="VIEW" enabled="true" />
-          <object-type name="MATERIALIZED_VIEW" enabled="true" />
-          <object-type name="NESTED_TABLE" enabled="true" />
-          <object-type name="COLUMN" enabled="true" />
-          <object-type name="INDEX" enabled="true" />
-          <object-type name="CONSTRAINT" enabled="true" />
-          <object-type name="DATASET_TRIGGER" enabled="true" />
-          <object-type name="DATABASE_TRIGGER" enabled="true" />
-          <object-type name="SYNONYM" enabled="true" />
-          <object-type name="SEQUENCE" enabled="true" />
-          <object-type name="PROCEDURE" enabled="true" />
-          <object-type name="FUNCTION" enabled="true" />
-          <object-type name="PACKAGE" enabled="true" />
-          <object-type name="TYPE" enabled="true" />
-          <object-type name="TYPE_ATTRIBUTE" enabled="true" />
-          <object-type name="ARGUMENT" enabled="true" />
-          <object-type name="DIMENSION" enabled="true" />
-          <object-type name="CLUSTER" enabled="true" />
-          <object-type name="DBLINK" enabled="true" />
-        </object-type-filter>
-      </filters>
-      <sorting>
-        <object-type name="COLUMN" sorting-type="NAME" />
-        <object-type name="FUNCTION" sorting-type="NAME" />
-        <object-type name="PROCEDURE" sorting-type="NAME" />
-        <object-type name="ARGUMENT" sorting-type="POSITION" />
-      </sorting>
-      <default-editors>
-        <object-type name="VIEW" editor-type="SELECTION" />
-        <object-type name="PACKAGE" editor-type="SELECTION" />
-        <object-type name="TYPE" editor-type="SELECTION" />
-      </default-editors>
-    </browser-settings>
-    <navigation-settings>
-      <lookup-filters>
-        <lookup-objects>
-          <object-type name="SCHEMA" enabled="true" />
-          <object-type name="USER" enabled="false" />
-          <object-type name="ROLE" enabled="false" />
-          <object-type name="PRIVILEGE" enabled="false" />
-          <object-type name="CHARSET" enabled="false" />
-          <object-type name="TABLE" enabled="true" />
-          <object-type name="VIEW" enabled="true" />
-          <object-type name="MATERIALIZED VIEW" enabled="true" />
-          <object-type name="NESTED TABLE" enabled="false" />
-          <object-type name="COLUMN" enabled="false" />
-          <object-type name="INDEX" enabled="true" />
-          <object-type name="CONSTRAINT" enabled="true" />
-          <object-type name="DATASET TRIGGER" enabled="true" />
-          <object-type name="DATABASE TRIGGER" enabled="true" />
-          <object-type name="SYNONYM" enabled="false" />
-          <object-type name="SEQUENCE" enabled="true" />
-          <object-type name="PROCEDURE" enabled="true" />
-          <object-type name="FUNCTION" enabled="true" />
-          <object-type name="PACKAGE" enabled="true" />
-          <object-type name="TYPE" enabled="true" />
-          <object-type name="TYPE ATTRIBUTE" enabled="false" />
-          <object-type name="ARGUMENT" enabled="false" />
-          <object-type name="DIMENSION" enabled="false" />
-          <object-type name="CLUSTER" enabled="false" />
-          <object-type name="DBLINK" enabled="true" />
-        </lookup-objects>
-        <force-database-load value="false" />
-        <prompt-connection-selection value="true" />
-        <prompt-schema-selection value="true" />
-      </lookup-filters>
-    </navigation-settings>
-    <dataset-grid-settings>
-      <general>
-        <enable-zooming value="true" />
-      </general>
-      <sorting>
-        <nulls-first value="true" />
-        <max-sorting-columns value="4" />
-      </sorting>
-      <tracking-columns>
-        <columnNames value="" />
-        <visible value="true" />
-        <editable value="false" />
-      </tracking-columns>
-    </dataset-grid-settings>
-    <dataset-editor-settings>
-      <text-editor-popup>
-        <active value="false" />
-        <active-if-empty value="false" />
-        <data-length-threshold value="100" />
-        <popup-delay value="1000" />
-      </text-editor-popup>
-      <values-list-popup>
-        <show-popup-button value="true" />
-        <element-count-threshold value="1000" />
-        <data-length-threshold value="250" />
-      </values-list-popup>
-      <general>
-        <fetch-block-size value="100" />
-        <fetch-timeout value="30" />
-        <trim-whitespaces value="true" />
-        <convert-empty-strings-to-null value="true" />
-        <select-content-on-cell-edit value="true" />
-        <large-value-preview-active value="true" />
-      </general>
-      <filters>
-        <prompt-filter-dialog value="true" />
-        <default-filter-type value="BASIC" />
-      </filters>
-      <qualified-text-editor text-length-threshold="300">
-        <content-types>
-          <content-type name="Text" enabled="true" />
-          <content-type name="XML" enabled="true" />
-          <content-type name="DTD" enabled="true" />
-          <content-type name="HTML" enabled="true" />
-          <content-type name="XHTML" enabled="true" />
-          <content-type name="SQL" enabled="true" />
-          <content-type name="PL/SQL" enabled="true" />
-          <content-type name="Bash" enabled="true" />
-        </content-types>
-      </qualified-text-editor>
-      <record-navigation>
-        <navigation-target value="VIEWER" />
-      </record-navigation>
-    </dataset-editor-settings>
-    <code-editor-settings>
-      <general>
-        <show-object-navigation-gutter value="false" />
-        <show-spec-declaration-navigation-gutter value="true" />
-      </general>
-      <confirmations>
-        <save-changes value="false" />
-        <revert-changes value="true" />
-      </confirmations>
-    </code-editor-settings>
-    <code-completion-settings>
-      <filters>
-        <basic-filter>
-          <filter-element type="RESERVED_WORD" id="keyword" selected="true" />
-          <filter-element type="RESERVED_WORD" id="function" selected="true" />
-          <filter-element type="RESERVED_WORD" id="parameter" selected="true" />
-          <filter-element type="RESERVED_WORD" id="datatype" selected="true" />
-          <filter-element type="RESERVED_WORD" id="exception" selected="true" />
-          <filter-element type="OBJECT" id="schema" selected="true" />
-          <filter-element type="OBJECT" id="role" selected="true" />
-          <filter-element type="OBJECT" id="user" selected="true" />
-          <filter-element type="OBJECT" id="privilege" selected="true" />
-          <user-schema>
-            <filter-element type="OBJECT" id="table" selected="true" />
-            <filter-element type="OBJECT" id="view" selected="true" />
-            <filter-element type="OBJECT" id="materialized view" selected="true" />
-            <filter-element type="OBJECT" id="index" selected="true" />
-            <filter-element type="OBJECT" id="constraint" selected="true" />
-            <filter-element type="OBJECT" id="trigger" selected="true" />
-            <filter-element type="OBJECT" id="synonym" selected="false" />
-            <filter-element type="OBJECT" id="sequence" selected="true" />
-            <filter-element type="OBJECT" id="procedure" selected="true" />
-            <filter-element type="OBJECT" id="function" selected="true" />
-            <filter-element type="OBJECT" id="package" selected="true" />
-            <filter-element type="OBJECT" id="type" selected="true" />
-            <filter-element type="OBJECT" id="dimension" selected="true" />
-            <filter-element type="OBJECT" id="cluster" selected="true" />
-            <filter-element type="OBJECT" id="dblink" selected="true" />
-          </user-schema>
-          <public-schema>
-            <filter-element type="OBJECT" id="table" selected="false" />
-            <filter-element type="OBJECT" id="view" selected="false" />
-            <filter-element type="OBJECT" id="materialized view" selected="false" />
-            <filter-element type="OBJECT" id="index" selected="false" />
-            <filter-element type="OBJECT" id="constraint" selected="false" />
-            <filter-element type="OBJECT" id="trigger" selected="false" />
-            <filter-element type="OBJECT" id="synonym" selected="false" />
-            <filter-element type="OBJECT" id="sequence" selected="false" />
-            <filter-element type="OBJECT" id="procedure" selected="false" />
-            <filter-element type="OBJECT" id="function" selected="false" />
-            <filter-element type="OBJECT" id="package" selected="false" />
-            <filter-element type="OBJECT" id="type" selected="false" />
-            <filter-element type="OBJECT" id="dimension" selected="false" />
-            <filter-element type="OBJECT" id="cluster" selected="false" />
-            <filter-element type="OBJECT" id="dblink" selected="false" />
-          </public-schema>
-          <any-schema>
-            <filter-element type="OBJECT" id="table" selected="true" />
-            <filter-element type="OBJECT" id="view" selected="true" />
-            <filter-element type="OBJECT" id="materialized view" selected="true" />
-            <filter-element type="OBJECT" id="index" selected="true" />
-            <filter-element type="OBJECT" id="constraint" selected="true" />
-            <filter-element type="OBJECT" id="trigger" selected="true" />
-            <filter-element type="OBJECT" id="synonym" selected="true" />
-            <filter-element type="OBJECT" id="sequence" selected="true" />
-            <filter-element type="OBJECT" id="procedure" selected="true" />
-            <filter-element type="OBJECT" id="function" selected="true" />
-            <filter-element type="OBJECT" id="package" selected="true" />
-            <filter-element type="OBJECT" id="type" selected="true" />
-            <filter-element type="OBJECT" id="dimension" selected="true" />
-            <filter-element type="OBJECT" id="cluster" selected="true" />
-            <filter-element type="OBJECT" id="dblink" selected="true" />
-          </any-schema>
-        </basic-filter>
-        <extended-filter>
-          <filter-element type="RESERVED_WORD" id="keyword" selected="true" />
-          <filter-element type="RESERVED_WORD" id="function" selected="true" />
-          <filter-element type="RESERVED_WORD" id="parameter" selected="true" />
-          <filter-element type="RESERVED_WORD" id="datatype" selected="true" />
-          <filter-element type="RESERVED_WORD" id="exception" selected="true" />
-          <filter-element type="OBJECT" id="schema" selected="true" />
-          <filter-element type="OBJECT" id="user" selected="true" />
-          <filter-element type="OBJECT" id="role" selected="true" />
-          <filter-element type="OBJECT" id="privilege" selected="true" />
-          <user-schema>
-            <filter-element type="OBJECT" id="table" selected="true" />
-            <filter-element type="OBJECT" id="view" selected="true" />
-            <filter-element type="OBJECT" id="materialized view" selected="true" />
-            <filter-element type="OBJECT" id="index" selected="true" />
-            <filter-element type="OBJECT" id="constraint" selected="true" />
-            <filter-element type="OBJECT" id="trigger" selected="true" />
-            <filter-element type="OBJECT" id="synonym" selected="true" />
-            <filter-element type="OBJECT" id="sequence" selected="true" />
-            <filter-element type="OBJECT" id="procedure" selected="true" />
-            <filter-element type="OBJECT" id="function" selected="true" />
-            <filter-element type="OBJECT" id="package" selected="true" />
-            <filter-element type="OBJECT" id="type" selected="true" />
-            <filter-element type="OBJECT" id="dimension" selected="true" />
-            <filter-element type="OBJECT" id="cluster" selected="true" />
-            <filter-element type="OBJECT" id="dblink" selected="true" />
-          </user-schema>
-          <public-schema>
-            <filter-element type="OBJECT" id="table" selected="true" />
-            <filter-element type="OBJECT" id="view" selected="true" />
-            <filter-element type="OBJECT" id="materialized view" selected="true" />
-            <filter-element type="OBJECT" id="index" selected="true" />
-            <filter-element type="OBJECT" id="constraint" selected="true" />
-            <filter-element type="OBJECT" id="trigger" selected="true" />
-            <filter-element type="OBJECT" id="synonym" selected="true" />
-            <filter-element type="OBJECT" id="sequence" selected="true" />
-            <filter-element type="OBJECT" id="procedure" selected="true" />
-            <filter-element type="OBJECT" id="function" selected="true" />
-            <filter-element type="OBJECT" id="package" selected="true" />
-            <filter-element type="OBJECT" id="type" selected="true" />
-            <filter-element type="OBJECT" id="dimension" selected="true" />
-            <filter-element type="OBJECT" id="cluster" selected="true" />
-            <filter-element type="OBJECT" id="dblink" selected="true" />
-          </public-schema>
-          <any-schema>
-            <filter-element type="OBJECT" id="table" selected="true" />
-            <filter-element type="OBJECT" id="view" selected="true" />
-            <filter-element type="OBJECT" id="materialized view" selected="true" />
-            <filter-element type="OBJECT" id="index" selected="true" />
-            <filter-element type="OBJECT" id="constraint" selected="true" />
-            <filter-element type="OBJECT" id="trigger" selected="true" />
-            <filter-element type="OBJECT" id="synonym" selected="true" />
-            <filter-element type="OBJECT" id="sequence" selected="true" />
-            <filter-element type="OBJECT" id="procedure" selected="true" />
-            <filter-element type="OBJECT" id="function" selected="true" />
-            <filter-element type="OBJECT" id="package" selected="true" />
-            <filter-element type="OBJECT" id="type" selected="true" />
-            <filter-element type="OBJECT" id="dimension" selected="true" />
-            <filter-element type="OBJECT" id="cluster" selected="true" />
-            <filter-element type="OBJECT" id="dblink" selected="true" />
-          </any-schema>
-        </extended-filter>
-      </filters>
-      <sorting enabled="true">
-        <sorting-element type="RESERVED_WORD" id="keyword" />
-        <sorting-element type="RESERVED_WORD" id="datatype" />
-        <sorting-element type="OBJECT" id="column" />
-        <sorting-element type="OBJECT" id="table" />
-        <sorting-element type="OBJECT" id="view" />
-        <sorting-element type="OBJECT" id="materialized view" />
-        <sorting-element type="OBJECT" id="index" />
-        <sorting-element type="OBJECT" id="constraint" />
-        <sorting-element type="OBJECT" id="trigger" />
-        <sorting-element type="OBJECT" id="synonym" />
-        <sorting-element type="OBJECT" id="sequence" />
-        <sorting-element type="OBJECT" id="procedure" />
-        <sorting-element type="OBJECT" id="function" />
-        <sorting-element type="OBJECT" id="package" />
-        <sorting-element type="OBJECT" id="type" />
-        <sorting-element type="OBJECT" id="dimension" />
-        <sorting-element type="OBJECT" id="cluster" />
-        <sorting-element type="OBJECT" id="dblink" />
-        <sorting-element type="OBJECT" id="schema" />
-        <sorting-element type="OBJECT" id="role" />
-        <sorting-element type="OBJECT" id="user" />
-        <sorting-element type="RESERVED_WORD" id="function" />
-        <sorting-element type="RESERVED_WORD" id="parameter" />
-      </sorting>
-      <format>
-        <enforce-code-style-case value="true" />
-      </format>
-    </code-completion-settings>
-    <execution-engine-settings>
-      <statement-execution>
-        <fetch-block-size value="100" />
-        <execution-timeout value="20" />
-        <debug-execution-timeout value="600" />
-        <focus-result value="false" />
-        <prompt-execution value="false" />
-      </statement-execution>
-      <script-execution>
-        <command-line-interfaces />
-        <execution-timeout value="300" />
-      </script-execution>
-      <method-execution>
-        <execution-timeout value="30" />
-        <debug-execution-timeout value="600" />
-        <parameter-history-size value="10" />
-      </method-execution>
-    </execution-engine-settings>
-    <operation-settings>
-      <transactions>
-        <uncommitted-changes>
-          <on-project-close value="ASK" />
-          <on-disconnect value="ASK" />
-          <on-autocommit-toggle value="ASK" />
-        </uncommitted-changes>
-        <multiple-uncommitted-changes>
-          <on-commit value="ASK" />
-          <on-rollback value="ASK" />
-        </multiple-uncommitted-changes>
-      </transactions>
-      <session-browser>
-        <disconnect-session value="ASK" />
-        <kill-session value="ASK" />
-        <reload-on-filter-change value="false" />
-      </session-browser>
-      <compiler>
-        <compile-type value="KEEP" />
-        <compile-dependencies value="ASK" />
-        <always-show-controls value="false" />
-      </compiler>
-      <debugger>
-        <debugger-type value="JDBC" />
-        <use-generic-runners value="true" />
-      </debugger>
-    </operation-settings>
-    <ddl-file-settings>
-      <extensions>
-        <mapping file-type-id="VIEW" extensions="vw" />
-        <mapping file-type-id="TRIGGER" extensions="trg" />
-        <mapping file-type-id="PROCEDURE" extensions="prc" />
-        <mapping file-type-id="FUNCTION" extensions="fnc" />
-        <mapping file-type-id="PACKAGE" extensions="pkg" />
-        <mapping file-type-id="PACKAGE_SPEC" extensions="pks" />
-        <mapping file-type-id="PACKAGE_BODY" extensions="pkb" />
-        <mapping file-type-id="TYPE" extensions="tpe" />
-        <mapping file-type-id="TYPE_SPEC" extensions="tps" />
-        <mapping file-type-id="TYPE_BODY" extensions="tpb" />
-      </extensions>
-      <general>
-        <lookup-ddl-files value="true" />
-        <create-ddl-files value="false" />
-        <synchronize-ddl-files value="true" />
-        <use-qualified-names value="false" />
-        <make-scripts-rerunnable value="true" />
-      </general>
-    </ddl-file-settings>
-    <general-settings>
-      <regional-settings>
-        <date-format value="MEDIUM" />
-        <number-format value="UNGROUPED" />
-        <locale value="SYSTEM_DEFAULT" />
-        <use-custom-formats value="false" />
-      </regional-settings>
-      <environment>
-        <environment-types>
-          <environment-type id="development" name="Development" description="Development environment" color="-2430209/-12296320" readonly-code="false" readonly-data="false" />
-          <environment-type id="integration" name="Integration" description="Integration environment" color="-2621494/-12163514" readonly-code="true" readonly-data="false" />
-          <environment-type id="production" name="Production" description="Productive environment" color="-11574/-10271420" readonly-code="true" readonly-data="true" />
-          <environment-type id="other" name="Other" description="" color="-1576/-10724543" readonly-code="false" readonly-data="false" />
-        </environment-types>
-        <visibility-settings>
-          <connection-tabs value="true" />
-          <dialog-headers value="true" />
-          <object-editor-tabs value="true" />
-          <script-editor-tabs value="false" />
-          <execution-result-tabs value="true" />
-        </visibility-settings>
-      </environment>
-    </general-settings>
-  </component>
-  <component name="DBNavigator.Project.StatementExecutionManager">
-    <execution-variables />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/encodings.xml b/.idea/encodings.xml
deleted file mode 100644
index 97626ba..0000000
--- a/.idea/encodings.xml
+++ /dev/null
@@ -1,6 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="Encoding">
-    <file url="PROJECT" charset="UTF-8" />
-  </component>
-</project>
\ No newline at end of file
diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
deleted file mode 100644
index 99b1a92..0000000
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ /dev/null
@@ -1,11 +0,0 @@
-<component name="InspectionProjectProfileManager">
-  <profile version="1.0">
-    <option name="myName" value="Project Default" />
-    <option name="myLocal" value="true" />
-    <inspection_tool class="SpellCheckingInspection" enabled="false" level="TYPO" enabled_by_default="false">
-      <option name="processCode" value="true" />
-      <option name="processLiterals" value="true" />
-      <option name="processComments" value="true" />
-    </inspection_tool>
-  </profile>
-</component>
\ No newline at end of file
diff --git a/.idea/inspectionProfiles/profiles_settings.xml b/.idea/inspectionProfiles/profiles_settings.xml
deleted file mode 100644
index 3b31283..0000000
--- a/.idea/inspectionProfiles/profiles_settings.xml
+++ /dev/null
@@ -1,7 +0,0 @@
-<component name="InspectionProjectProfileManager">
-  <settings>
-    <option name="PROJECT_PROFILE" value="Project Default" />
-    <option name="USE_PROJECT_PROFILE" value="true" />
-    <version value="1.0" />
-  </settings>
-</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
deleted file mode 100644
index 8e17af1..0000000
--- a/.idea/misc.xml
+++ /dev/null
@@ -1,33 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="IpnbSettings">
-    <option name="URL" value="http://127.0.0.1:8893" />
-  </component>
-  <component name="ProjectInspectionProfilesVisibleTreeState">
-    <entry key="Project Default">
-      <profile-state>
-        <expanded-state>
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