Add methods for ZKInputs IntermStates generation

- Add L1Tx TxCompressedData method
- Add PoolL2Tx TxCompressedDataV2 method
- Update ProcessTxs logic
- Add ZKInputs Intermediate States & Fee parameters calculation

common/l1tx_test.go

@@ -49,6 +49,22 @@ func TestNewL1CoordinatorTx(t *testing.T) {
 	assert.Equal(t, "0x01000000000000cafe005800", l1Tx.TxID.String())
 }
 
+func TestL1TxCompressedData(t *testing.T) {
+	tx := L1Tx{
+		FromIdx: 2,
+		ToIdx:   3,
+		Amount:  big.NewInt(4),
+		TokenID: 5,
+	}
+	txCompressedData, err := tx.TxCompressedData()
+	assert.Nil(t, err)
+
+	// test vector value generated from javascript implementation
+	expectedStr := "7307597389635308713748674793997299267460566876160"
+	assert.Equal(t, expectedStr, txCompressedData.String())
+	assert.Equal(t, "050004000000000003000000000002000100000000", hex.EncodeToString(txCompressedData.Bytes()))
+}
+
 func TestL1userTxByteParsers(t *testing.T) {
 	var pkComp babyjub.PublicKeyComp
 	pkCompL := []byte("0x56ca90f80d7c374ae7485e9bcc47d4ac399460948da6aeeb899311097925a72c")