Ethereum-PHP Calling contract function with parameter

manpreet Best Answer 2 years ago

I'm not the author of Ethereum part but have to connect to using php. Choosen Ethereum-PHP package (https://github.com/digitaldonkey/ethereum-php). Have connection to ethereum and smart contract but cannot execute smart contract function with parameter successfuly. I have Schema contract and function test ():

 function test(uint value) public returns(uint) {
return value*2;
 }

and ABI:

...
{"constant":false,"inputs":[{"name":"value","type":"uint256"}],
"name":"test","outputs":
[{"name":"","type":"uint256"}],
"payable":false,"stateMutability":"nonpayable","type":"function"}
...

Now in php I have:

  $eth = new Ethereum('https://kovan.infura.io/address>');
  $schemaContract = new SmartContract($abi, 'address>', $eth);

  // Call a function with result : 2
  $result = $schemaContract->test(1)->Val();

I cannot recieve the result. Don't know exactly how to achieve this. Tried many different options like :

$result = $schemaContract->test(1);
$result = $schemaContract->test('1');
$result = $schemaContract->test(1);
$result = $schemaContract->__call('test',1);

But always recieved some error messages.

What am I doing wrong?

Best regards, TB