mev-beta/pkg/arbitrum/abi_decoder_fuzz_test.go

package arbitrum

import (
	"testing"
)

// FuzzABIValidation tests ABI decoding validation functions
func FuzzABIValidation(f *testing.F) {
	f.Fuzz(func(t *testing.T, dataLen uint16, protocol string) {
		defer func() {
			if r := recover(); r != nil {
				t.Errorf("ABI validation panicked with data length %d: %v", dataLen, r)
			}
		}()

		// Limit data length to reasonable size
		if dataLen > 10000 {
			dataLen = dataLen % 10000
		}

		data := make([]byte, dataLen)
		for i := range data {
			data[i] = byte(i % 256)
		}

		// Test the validation functions we added to ABI decoder
		decoder, err := NewABIDecoder()
		if err != nil {
			t.Skip("Could not create ABI decoder")
		}

		// Test input validation
		err = decoder.ValidateInputData(data, protocol)

		// Should not panic, and error should be descriptive if present
		if err != nil && len(err.Error()) == 0 {
			t.Error("Error message should not be empty")
		}

		// Test parameter validation if data is large enough
		if len(data) >= 32 {
			err = decoder.ValidateABIParameter(data, 0, 32, "address", protocol)
			if err != nil && len(err.Error()) == 0 {
				t.Error("Parameter validation error message should not be empty")
			}
		}

		// Test array bounds validation if data is large enough
		if len(data) >= 64 {
			err = decoder.ValidateArrayBounds(data, 0, 2, 32, protocol)
			if err != nil && len(err.Error()) == 0 {
				t.Error("Array validation error message should not be empty")
			}
		}
	})
}