diff --git a/athena_abi/event_decoders_test.go b/athena_abi/event_decoders_test.go
new file mode 100644
index 00000000..261a2e72
--- /dev/null
+++ b/athena_abi/event_decoders_test.go
@@ -0,0 +1,96 @@
+package athena_abi
+
+import (
+    "math/big"
+    "testing"
+
+    "github.com/stretchr/testify/assert"
+)
+
+func TestEventDecode(t *testing.T) {
+    tests := []struct {
+        name       string
+        abiEvent   *AbiEvent
+        eventData  []*big.Int
+        eventKeys  []*big.Int
+        expected   map[string]interface{}
+    }{
+        {
+            name: "Approval Event",
+            abiEvent: NewAbiEvent(
+                "Approval",
+                []string{"owner", "spender", "value"},
+                map[string]StarknetType{"value": U256},
+                map[string]StarknetType{"owner": U256, "spender": U256},
+                "erc20_key_events",
+            ),
+            eventData: []*big.Int{
+                mustParseBigInt("C95E3D845779376FED50", 16),
+                big.NewInt(0),
+            },
+            eventKeys: []*big.Int{
+                mustParseBigInt("0134692B230B9E1FFA39098904722134159652B09C5BC41D88D6698779D228FF", 16), // Event ID
+                mustParseBigInt("060CAFC0B0E66067B3A4978E93552DE54E0CAEEB82A352A202E0DC79A41459B6", 16), // Owner low
+                big.NewInt(0), // Owner high
+                mustParseBigInt("04270219D365D6B017231B52E92B3FB5D7C8378B05E9ABC97724537A80E93B0F", 16), // Spender low
+                big.NewInt(0), // Spender high
+            },
+            expected: map[string]interface{}{
+                "owner":   mustParseBigInt("060CAFC0B0E66067B3A4978E93552DE54E0CAEEB82A352A202E0DC79A41459B6", 16),
+                "spender": mustParseBigInt("04270219D365D6B017231B52E92B3FB5D7C8378B05E9ABC97724537A80E93B0F", 16),
+                "value":   mustParseBigInt("C95E3D845779376FED50", 16), //Doubt here needs review 
+            },
+        },
+    }
+
+    for _, test := range tests {
+        t.Run(test.name, func(t *testing.T) {
+            decodedEvent, err := test.abiEvent.Decode(test.eventData, test.eventKeys)
+            if err != nil {
+                t.Fatalf("Error decoding event: %v\nEvent Data: %v\nEvent Keys: %v", err, test.eventData, test.eventKeys)
+            }
+
+            assert.Equal(t, test.abiEvent.abiName, decodedEvent.abiName)
+            assert.Equal(t, test.abiEvent.name, decodedEvent.name)
+
+            for key, expectedValue := range test.expected {
+                actualValue, exists := decodedEvent.data[key]
+                assert.True(t, exists, "Key %s not found in decoded event", key)
+                if !exists {
+                    continue
+                }
+
+                switch expected := expectedValue.(type) {
+                case string:
+                    actual, ok := actualValue.(*big.Int)
+                    assert.True(t, ok, "Expected *big.Int for key %s, got %T", key, actualValue)
+                    if ok {
+                        assert.Equal(t, expected, bigIntToAddress(actual))
+                    }
+                case *big.Int:
+                    actual, ok := actualValue.(*big.Int)
+                    assert.True(t, ok, "Expected *big.Int for key %s, got %T", key, actualValue)
+                    if ok {
+                        assert.Equal(t, 0, expected.Cmp(actual), "For key %s, expected %s, got %s", key, expected.String(), actual.String())
+                    }
+                default:
+                    t.Errorf("Unexpected type for key %s: %T", key, expectedValue)
+                }
+            }
+        })
+    }
+}
+
+// Helper function to parse big integers
+func mustParseBigInt(s string, base int) *big.Int {
+    n, ok := new(big.Int).SetString(s, base)
+    if !ok {
+        panic("Failed to parse big integer: " + s)
+    }
+    return n
+}
+
+// Helper function to convert big.Int to address string
+func bigIntToAddress(n *big.Int) string {
+    return "0x" + n.Text(16)
+}
\ No newline at end of file