Modifiers misunderstanding

Question

pragma solidity ^0.4.0;

contract test {

  bool test_bool1 = false;

  bool test_bool2 = true;

  modifier test_modifier(bool _test_bool){
      if (_test_bool == false) throw;
      _;
  }

  function test1(uint input1) test_modifier(test_bool1) returns (uint){
      return input1;
  }

   function test2(uint input2) test_modifier(test_bool2) returns (uint){
      return input2;
  }

}

Here is my simple modifier test code. If I deploy that contract and call test.test1(5), I expect shoud not return anything because test_bool1 is false. The result of eth.getTransaction() of this function call transactionHash will be:

>console.log((eth.getTransaction("0x9da931ab4a750423bd780a3b76b70d32ab14f7af0bb967f765c72f9e84674e48").input))
    0x19ae89940000000000000000000000000000000000000000000000000000000000000005
    5

And if I do it again with test.test2(5) (which passed modifier test) I get:

> console.log((eth.getTransaction("0xdf2d0d0ff2a7aed5bf53ca23ccbcb05c76f350255120a098829c839965c4439d").input))
0xcaf446830000000000000000000000000000000000000000000000000000000000000005
5

Why did that happend?
Is there anything about first 8 digits of transaction input? caf44683, 19ae8994

Answer 1

You get transaction details for a failed transaction but later on, you are checking the input value of this transaction, which indeed for the first transaction is 5 (data sent by you as specified in docs):

).input)

rather that checking for a result value. To do so, you may publish an event populated by a return value and listen for such an event.