Updated on 2026-08-14

core/utils/src/main/java/com/tangem/utils/extensions/ByteArrayExt.kt

@@ -0,0 +1,38 @@
+package com.tangem.utils.extensions
+
+private const val BYTES_IN_HEX = 2
+private const val RADIX = 16
+
+/**
+ * Converts a [ByteArray] to its hexadecimal string representation
+ *
+ * @return a [String] containing the hexadecimal representation of the byte array
+ */
+fun ByteArray.toHexString(): String = joinToString("") { "%02X".format(it) }
+
+/**
+ * Converts a hexadecimal [String] to a [ByteArray]
+ *
+ * @return a [ByteArray] representing the binary data of the hexadecimal string
+ * @throws NumberFormatException if the string is not a valid hexadecimal representation
+ */
+fun String.hexToBytes(): ByteArray {
+    val hexString = this.removePrefix("0x")
+
+    return ByteArray(size = hexString.length / BYTES_IN_HEX) { i ->
+        Integer.parseInt(
+            hexString.substring(
+                startIndex = BYTES_IN_HEX * i,
+                endIndex = BYTES_IN_HEX * i + BYTES_IN_HEX,
+            ),
+            RADIX,
+        ).toByte()
+    }
+}
+
+/**
+ * Safely converts a hexadecimal [String] to a [ByteArray]
+ *
+ * @return a [ByteArray] if the conversion is successful, or `null` if an exception occurs
+ */
+fun String.hexToBytesOrNull(): ByteArray? = runCatching(String::hexToBytes).getOrNull()