(PHP ActiveX) Generate an E-way Bill

Demonstrates how to send an HTTP POST request to generate an e-way bill.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// This example uses the previously obtained access token that was retrieved
// in this example:  Get EWAY Auth Token using Gstin, username, password, and app_key

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonAuth = new COM("Chilkat.JsonObject");
$success = $jsonAuth->LoadFile('qa_data/tokens/ewayAuth.json');
if ($success != 1) {
    print $jsonAuth->LastErrorText . "\n";
    exit;
}

// The jsonAuth contains something like this:
// {
//   "authToken": "IBTeFtxNfVurg71LTzZ2r0xK7",
//   "decryptedSek": "5g1TyTie7yoslU3DrbYATa7mWyPazlODE7cEh5Vy4Ho="
// }

// Generate the JSON data for the e-way bill.
// The following code can be generated by pasting representative JSON into this online tool:
// Generate JSON Code
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonData = new COM("Chilkat.JsonObject");
$jsonData->UpdateString('supplyType','O');
$jsonData->UpdateString('subSupplyType','1');
$jsonData->UpdateString('docType','INV');
$jsonData->UpdateString('docNo','AW1234-2');
$jsonData->UpdateString('docDate','05/04/2018');
$jsonData->UpdateString('fromGstin','09ABDC24212B1FK');
$jsonData->UpdateString('fromTrdName','willy');
$jsonData->UpdateString('fromAddr1','3RD CROSS NO 200  19  A');
$jsonData->UpdateString('fromAddr2','GROUND FLOOR OZZY ROAD');
$jsonData->UpdateString('fromPlace','BUSY TOWN');
$jsonData->UpdateNumber('fromPincode','640033');
$jsonData->UpdateNumber('actFromStateCode','05');
$jsonData->UpdateNumber('fromStateCode','05');
$jsonData->UpdateString('toGstin','01AAAASCC10BBBB');
$jsonData->UpdateString('toTrdName','mthustra');
$jsonData->UpdateString('toAddr1','Shrek Ogre');
$jsonData->UpdateString('toAddr2','Basadronsil');
$jsonData->UpdateString('toPlace','Grifl Blagar');
$jsonData->UpdateNumber('toPincode','699988');
$jsonData->UpdateNumber('actToStateCode','29');
$jsonData->UpdateNumber('toStateCode','02');
$jsonData->UpdateNumber('totalValue','5609889');
$jsonData->UpdateNumber('cgstValue','0');
$jsonData->UpdateNumber('sgstValue','0');
$jsonData->UpdateNumber('igstValue','168296.67');
$jsonData->UpdateNumber('cessValue','224395.56');
$jsonData->UpdateString('transporterId','09ABDC24212B1FK');
$jsonData->UpdateString('transporterName','');
$jsonData->UpdateString('transDocNo','12332');
$jsonData->UpdateNumber('transMode','1');
$jsonData->UpdateString('transDistance','656');
$jsonData->UpdateString('transDocDate','10/04/2018');
$jsonData->UpdateString('vehicleNo','PBN4567');
$jsonData->UpdateString('vehicleType','R');
$jsonData->I = 0;
$jsonData->UpdateString('itemList[i].productName','Wheat');
$jsonData->UpdateString('itemList[i].productDesc','Wheat');
$jsonData->UpdateNumber('itemList[i].hsnCode','1001');
$jsonData->UpdateNumber('itemList[i].quantity','4');
$jsonData->UpdateString('itemList[i].qtyUnit','BOX');
$jsonData->UpdateNumber('itemList[i].cgstRate','0');
$jsonData->UpdateNumber('itemList[i].sgstRate','0');
$jsonData->UpdateNumber('itemList[i].igstRate','3');
$jsonData->UpdateNumber('itemList[i].cessRate','4');
$jsonData->UpdateNumber('itemList[i].cessAdvol','0');
$jsonData->UpdateNumber('itemList[i].taxableAmount','5609889');

// The body of the HTTP POST will contain JSON that looks like this:
// 	{
// 	"action":"GENEWAYBILL",
// 	"data": " iJiJGXq ... oUZp/25Y "
// 	}

// The "data" is the encrypted jsonData using our previously agreed-upon symmetric encryption key.
// Let's begin build the JSON request body..
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonRequestBody = new COM("Chilkat.JsonObject");
$jsonRequestBody->UpdateString('action','GENEWAYBILL');

// Setup the encryptor using the decryptedSek from the jsonAuth
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2')
$crypt = new COM("Chilkat.Crypt2");
$crypt->CryptAlgorithm = 'aes';
$crypt->CipherMode = 'ecb';
$crypt->KeyLength = 256;
$crypt->SetEncodedKey($jsonAuth->stringOf('decryptedSek'),'base64');
$crypt->EncodingMode = 'base64';

// Encrypt the jsonData and add it to our JSON request body
$jsonRequestBody->UpdateString('data',$crypt->encryptStringENC($jsonData->emit()));

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Http')
$http = new COM("Chilkat.Http");

// Add the authtoken to the request header.
// Be careful to be precise with uppercase/lowercase ("authtoken" vs "authToken")
$http->SetRequestHeader('authtoken',$jsonAuth->stringOf('authToken'));
$http->SetRequestHeader('Gstin','09ABDC24212B1FK');
$http->Accept = 'application/json';

// POST the request to generate an e-way bill:
// resp is a Chilkat.HttpResponse
$resp = $http->PostJson2('http://ewb.wepgst.com/api/EWayBill','application/json',$jsonRequestBody->emit());
if ($http->LastMethodSuccess != 1) {
    print $http->LastErrorText . "\n";
    exit;
}

$respStatusCode = $resp->StatusCode;
print 'response status code =' . $respStatusCode . "\n";
print 'response body:' . "\n";
print $resp->BodyStr . "\n";

if ($respStatusCode != 200) {

    print 'Failed in some unknown way.' . "\n";
    exit;
}

// When the response status code = 200, we'll have either
// success response like this:
//  {"status":"1","data":"..."}
// 
// or a failed response like this:
// 
// {"status":"0","error":"eyJlcnJvckNvZGVzIjoiMTA4In0="}

// Load the response body into a JSON object.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$json = new COM("Chilkat.JsonObject");
$json->Load($resp->BodyStr);

$status = $json->IntOf('status');
print 'status = ' . $status . "\n";

if ($status != 1) {
    // Failed.  Base64 decode the error
    // {"status":"0","error":"eyJlcnJvckNvZGVzIjoiMTA4In0="}
    // For an invalid password, the error is: {"errorCodes":"108"}
    // For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
    $sbError = new COM("Chilkat.StringBuilder");
    $json->StringOfSb('error',$sbError);
    $sbError->Decode('base64','utf-8');
    print 'error: ' . $sbError->getAsString() . "\n";
    exit;
}

$json->EmitCompact = 0;
print 'JSON response:' . "\n";
print $json->emit() . "\n";

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$bdData = new COM("Chilkat.BinData");
$bdData->AppendEncoded($json->stringOf('data'),'base64');
$crypt->DecryptBd($bdData);

// Decrypts to 
// {"ewayBillNo":331001121234,"ewayBillDate":"24/05/2018 04:38:00 PM","validUpto":"31/05/2018 11:59:00 PM"}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.JsonObject')
$jsonBill = new COM("Chilkat.JsonObject");
$jsonBill->Load($bdData->getString('utf-8'));

$ewayBillNo = $jsonBill->IntOf('ewayBillNo');
print 'ewayBillNo = ' . $ewayBillNo . "\n";

$ewayBillDate = $jsonBill->stringOf('ewayBillDate');
print 'ewayBillDate = ' . $ewayBillDate . "\n";

$validUpto = $jsonBill->stringOf('validUpto');
print 'validUpto = ' . $validUpto . "\n";

// Sample output:

// ewayBillNo = 331001121234
// ewayBillDate = 24/05/2018 04:55:00 PM
// validUpto = 31/05/2018 11:59:00 PM

?>