diff --git a/src/components/AddressHighlighter.tsx b/src/components/AddressHighlighter.tsx
index 7d37b2a..0848a48 100644
--- a/src/components/AddressHighlighter.tsx
+++ b/src/components/AddressHighlighter.tsx
@@ -1,5 +1,5 @@
-import React, { useMemo } from "react";
-import { useSelectionContext } from "../useSelection";
+import React from "react";
+import SelectionHighlighter, { addressSelector } from "./SelectionHighlighter";
 
 type AddressHighlighterProps = React.PropsWithChildren<{
   address: string;
@@ -8,50 +8,14 @@ type AddressHighlighterProps = React.PropsWithChildren<{
 const AddressHighlighter: React.FC<AddressHighlighterProps> = ({
   address,
   children,
-}) => {
-  const [selection, setSelection] = useSelectionContext();
-  const [select, deselect] = useMemo(() => {
-    const _select = () => {
-      setSelection({ type: "address", content: address });
-    };
-    const _deselect = () => {
-      setSelection(null);
-    };
-    return [_select, _deselect];
-  }, [setSelection, address]);
-
-  return (
-    <AddressHighlighterImpl
-      selected={
-        selection !== null &&
-        selection.type === "address" &&
-        selection.content === address
-      }
-      select={select}
-      deselect={deselect}
-    >
-      {children}
-    </AddressHighlighterImpl>
-  );
-};
-
-type _AddressHighlighterImplProps = {
-  selected: boolean;
-  select: () => void;
-  deselect: () => void;
-};
-
-const AddressHighlighterImpl: React.FC<_AddressHighlighterImplProps> =
-  React.memo(({ selected, select, deselect, children }) => (
-    <div
-      className={`border border-dashed rounded hover:bg-transparent hover:border-transparent px-1 truncate ${
-        selected ? "border-orange-400 bg-yellow-100" : "border-transparent"
-      }`}
-      onMouseEnter={select}
-      onMouseLeave={deselect}
-    >
-      {children}
-    </div>
-  ));
+}) => (
+  <SelectionHighlighter
+    myType="address"
+    myContent={address}
+    selector={addressSelector}
+  >
+    {children}
+  </SelectionHighlighter>
+);
 
 export default AddressHighlighter;
diff --git a/src/components/SelectionHighlighter.tsx b/src/components/SelectionHighlighter.tsx
new file mode 100644
index 0000000..baa2ec5
--- /dev/null
+++ b/src/components/SelectionHighlighter.tsx
@@ -0,0 +1,76 @@
+import React, { useMemo } from "react";
+import {
+  useSelectionContext,
+  OptionalSelection,
+  SelectionType,
+} from "../useSelection";
+
+export type ContentSelector = (
+  selection: OptionalSelection,
+  content: string
+) => boolean;
+
+export const genericSelector =
+  (type: SelectionType) =>
+  (selection: OptionalSelection, content: string): boolean =>
+    selection !== null &&
+    selection.type === type &&
+    selection.content === content;
+
+export const addressSelector: ContentSelector = genericSelector("address");
+
+type SelectionHighlighterProps = React.PropsWithChildren<{
+  myType: SelectionType;
+  myContent: string;
+  selector: ContentSelector;
+}>;
+
+const SelectionHighlighter: React.FC<SelectionHighlighterProps> = ({
+  myType,
+  myContent,
+  selector,
+  children,
+}) => {
+  const [selection, setSelection] = useSelectionContext();
+  const [select, deselect] = useMemo(() => {
+    const _select = () => {
+      setSelection({ type: myType, content: myContent });
+    };
+    const _deselect = () => {
+      setSelection(null);
+    };
+    return [_select, _deselect];
+  }, [setSelection, myType, myContent]);
+
+  return (
+    <HighlighterBox
+      selected={selector(selection, myContent)}
+      select={select}
+      deselect={deselect}
+    >
+      {children}
+    </HighlighterBox>
+  );
+};
+
+type HighlighterBoxProps = {
+  selected: boolean;
+  select: () => void;
+  deselect: () => void;
+};
+
+const HighlighterBox: React.FC<HighlighterBoxProps> = React.memo(
+  ({ selected, select, deselect, children }) => (
+    <div
+      className={`border border-dashed rounded hover:bg-transparent hover:border-transparent px-1 truncate ${
+        selected ? "border-orange-400 bg-yellow-100" : "border-transparent"
+      }`}
+      onMouseEnter={select}
+      onMouseLeave={deselect}
+    >
+      {children}
+    </div>
+  )
+);
+
+export default SelectionHighlighter;
diff --git a/src/transaction/FunctionSignature.tsx b/src/transaction/FunctionSignature.tsx
new file mode 100644
index 0000000..516e8a7
--- /dev/null
+++ b/src/transaction/FunctionSignature.tsx
@@ -0,0 +1,25 @@
+import React from "react";
+
+type FunctionSignatureProps = {
+  callType: string;
+  sig: string;
+};
+
+const FunctionSignature: React.FC<FunctionSignatureProps> = ({
+  callType,
+  sig,
+}) => (
+  <span
+    className={`font-bold ${
+      callType === "STATICCALL"
+        ? "text-red-700"
+        : callType === "DELEGATECALL" || callType === "CALLCODE"
+        ? "text-gray-400"
+        : "text-blue-900"
+    }`}
+  >
+    {sig}
+  </span>
+);
+
+export default FunctionSignature;
diff --git a/src/transaction/TraceItem.tsx b/src/transaction/TraceItem.tsx
index e161674..f8e2288 100644
--- a/src/transaction/TraceItem.tsx
+++ b/src/transaction/TraceItem.tsx
@@ -2,6 +2,7 @@ import React from "react";
 import AddressHighlighter from "../components/AddressHighlighter";
 import DecoratedAddressLink from "../components/DecoratedAddressLink";
 import FormattedBalance from "../components/FormattedBalance";
+import FunctionSignature from "./FunctionSignature";
 import { TransactionData } from "../types";
 import { rawInputTo4Bytes, use4Bytes } from "../use4Bytes";
 import { TraceGroup } from "../useErigonHooks";
@@ -38,17 +39,10 @@ const TraceItem: React.FC<TraceItemProps> = ({ t, txData, last }) => {
             </AddressHighlighter>
           </span>
           <span>.</span>
-          <span
-            className={`font-bold ${
-              t.type === "STATICCALL"
-                ? "text-red-700"
-                : t.type === "DELEGATECALL" || t.type === "CALLCODE"
-                ? "text-gray-400"
-                : "text-blue-900"
-            }`}
-          >
-            {fourBytesEntry ? fourBytesEntry.name : raw4Bytes}
-          </span>
+          <FunctionSignature
+            callType={t.type}
+            sig={fourBytesEntry ? fourBytesEntry.name : raw4Bytes}
+          />
           {t.value && !t.value.isZero() && (
             <span className="text-red-700 whitespace-nowrap">
               {"{"}value: <FormattedBalance value={t.value} /> ETH{"}"}
diff --git a/src/useSelection.ts b/src/useSelection.ts
index 03a2a92..8dc8f95 100644
--- a/src/useSelection.ts
+++ b/src/useSelection.ts
@@ -6,12 +6,14 @@ import {
   useContext,
 } from "react";
 
+export type SelectionType = "address" | "value" | "functionSig";
+
 export type Selection = {
-  type: "address" | "value";
+  type: SelectionType;
   content: string;
 };
 
-type OptionalSelection = Selection | null;
+export type OptionalSelection = Selection | null;
 
 export const useSelection = (): [
   OptionalSelection,