callContract()

Use this method if you want to execute a function writte in a smart contract.

Method Signature

public function callContract($blockchain, $from, $address, $request) 

Parameters

Name	Type	Description
blockchain	String	Blockchain address in hex
from	String	User's wallet address in hex
address	String	Smart Contract's address in hex
request	String	Requested function in string format (include the parenthesis and the semicolumn e.g. CRC_Contract.__GetContractName();).

Example

<?php
require 'vendor/autoload.php';
use CircularProtocol\Api\CircularProtocolAPI;

$circular = new CircularProtocolAPI();
$blockchain = "0x8a20baa40c45dc5055aeb26197c203e576ef389d9acb171bd62da11dc5ad72b2";
$senderAddress = "0x8b1dd25076c04c5139acba458f86c69cd2d322c61d19bc28daa3bbd945083738";
$contractAddress = "0x9f1dd25076c04c5139acba438f86c69adbd322c61d19bc28dff3bbd9450837312"
$request = "CRC_Contract.__GetContractName();"

$result = $circular->callContract($blockchain, $senderAddress, $contractAddress, $request);

Result

The result will be of type Array, but for easier readability, here is the equivalent in JSON.

200

{
    "Result": 200,
    "Response": "7b20225f506572666f726d616e636522203a2022487970657220436f646520457865637574696f6e2054696d653a20313130307573222c200a0a225f436f6e736f6c655f4f757470757422203a202235343635373337343230373336643631373237343230363336663665373437323631363337343061227d",
    "Node": "7bb5bd50729d6857942701d5673ea70ca1625f883230d8543970a452d1abe1c4"
}

Remember to convert the response from Hex to String if you want to get the result in plain text.

117

Wrong function call. Remember to pass the request in Hex format as shown in the body section or to verify that the smart contract address is the right one.

{
    "Result": 117,
    "Response": "4552524f523a57726f6e672046756e6374696f6e2043616c6c3a200a",
    "Node": "7bb5bd50729d6857942701d5673ea70ca1625f883230d8543970a452d1abe1c4"
}