<?php 

include_once "../libraries/vendor/autoload.php";

$hosts = ["https://mainnet.infura.io"=>"https://mainnet.infura.io","https://goerli.infura.io"=>"https://goerli.infura.io", "https://cloudflare-eth.com"=>"https://cloudflare-eth.com", "https://eth-mainnet.alchemyapi.io"=>"https://eth-mainnet.alchemyapi.io", "https://eth-ropsten.alchemyapi.io"=>"https://eth-ropsten.alchemyapi.io", "https://testnet-rpc.anisticnetwork.net"=>"https://testnet-rpc.anisticnetwork.net", "https://data-seed-prebsc-1-s2.binance.org:8545"=>"https://data-seed-prebsc-1-s2.binance.org:8545"];

$apis = ['eth_maxPriorityFeePerGas','eth_feeHistory', 'eth_syncing','eth_coinbase','eth_mining','eth_hashrate','eth_gasPrice','eth_accounts','eth_blockNumber','eth_chainId','eth_getBalance','eth_getStorageAt','eth_getTransactionCount','eth_getBlockTransactionCountByHash','eth_getBlockTransactionCountByNumber','eth_getUncleCountByBlockHash','eth_getUncleCountByBlockNumber','eth_getCode','eth_sign','eth_sendTransaction','eth_sendRawTransaction','eth_call','eth_estimateGas','eth_getBlockByHash','eth_getBlockByNumber','eth_getTransactionByHash','eth_getTransactionByBlockHashAndIndex','eth_getTransactionByBlockNumberAndIndex','eth_getTransactionReceipt','eth_pendingTransactions','eth_getUncleByBlockHashAndIndex','eth_getUncleByBlockNumberAndIndex','eth_getCompilers','eth_compileLLL','eth_compileSolidity','eth_compileSerpent','eth_newFilter','eth_newBlockFilter','eth_newPendingTransactionFilter','eth_uninstallFilter','eth_getFilterChanges','eth_getFilterLogs','eth_getLogs','eth_getWork','eth_submitWork','eth_submitHashrate','eth_getProof'];


if ($_SERVER['REQUEST_METHOD'] == 'POST') {
	
	$ajaxData = [];
	if ($_GET['action'] == 'add_json_request') {
		
		
		try {
			
			if (!in_array($_POST['host'], array_keys($hosts))) {
				throw new Exception("Please provide valid host.");
			}
			
			$url = $_POST['host'] . "/" . $_POST['path'];
			
			$ch = curl_init();
			$requestId = time();
			$paramsParams = json_decode($_POST['params'], true);
			if (json_last_error() != JSON_ERROR_NONE) {
				throw new Exception("`Params` is not a proper JSON string.");
			}
			
			$params = [];
			$params['jsonrpc']= $_POST['jsonver'];
			$params['method'] = $_POST['method'];			
			$params['params'] = $paramsParams;
			$params['id'] = $requestId;
			
			curl_setopt($ch, CURLOPT_URL,$url);
			curl_setopt($ch, CURLOPT_POST, 1);
			curl_setopt($ch, CURLOPT_POSTFIELDS,$req = json_encode($params));
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
			curl_setopt($ch, CURLOPT_HTTPHEADER, ["Content-Type: application/json"]);

			$resp = curl_exec($ch);
			
			if ($resp === false) {
				throw new Exception("curl_exec return false.");
			}
			
			if (strlen($err = @curl_error($ch)) > 0) {
				$errno = @curl_errno($ch);
				throw new Exception( "{$err} ({$errno})." );
			}
			
			$result = json_decode($resp,true); 
			if ($result['id'] != $requestId) {
				throw new Exception("Invalid request id.");
			} else if (isset($result['error'])) {
				throw new Exception(json_encode($result['error']));
			}
			
			curl_close ($ch);
			
			$ajaxData['data'] = ["method"=>$_POST['method'], "params"=>$paramsParams, "jsonrpc"=>$_POST['jsonver'], "id"=>$requestId];
			
		} catch (Exception $e) {
			$errmsg .= "Problem found. " . $e->getMessage();
		}
		
		if ($_GET['ajax'] == '1') {
			if ($errmsg) {
				$ajaxData['error'] = $errmsg;
			} 
			
			die(json_encode($ajaxData));
		}
	}
} 

include_once("html_iframe_header.php");

if ($_SERVER['REQUEST_METHOD'] == 'POST') {
	try {
		
		if (!in_array($_POST['host'], array_keys($hosts))) {
			throw new Exception("Please provide valid host.");
		}
		$url = $_POST['host'] . "/" . $_POST['path'];
		
		$ch = curl_init();
		
		$requests = [];
		foreach($_POST["requests"] as $request) {
			$requests[] = json_decode($request, true);
			
			if (json_last_error() != JSON_ERROR_NONE) {
				throw new Exception("Some request is not a proper JSON string.");
			}
		}
		
		curl_setopt($ch, CURLOPT_URL,$url);
		curl_setopt($ch, CURLOPT_POST, 1);
		curl_setopt($ch, CURLOPT_POSTFIELDS,$payload = json_encode($requests));
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_HTTPHEADER, ["Content-Type: application/json"]);

		$resp = curl_exec($ch);
		
		if ($resp === false) {
			throw new Exception("curl_exec return false.");
		}
		
		if (strlen($err = @curl_error($ch)) > 0) {
			$errno = @curl_errno($ch);
			throw new Exception( "{$err} ({$errno})." );
		}
		
		$result = json_decode($resp,true); 
		
		curl_close ($ch);
		
		?>
		<div class="alert alert-success">
			<h6 class="mt-3">Host</h6>
			<textarea class="form-control" rows="1" readonly><?php echo $url;?></textarea>
			
			<h6 class="mt-3">JSON-RPC Request</h6>
			<textarea class="form-control" rows="5" id="comment" readonly><?php echo $payload;?></textarea>
			
			<h6 class="mt-3">JSON-RPC Response</h6>
			<textarea class="form-control" rows="5" id="comment" readonly><?php echo $resp;?></textarea>
		</div>
		<?php
			
	} catch (Exception $e) {
		$errmsg .= "Problem found. " . $e->getMessage();
	}
}

if ($errmsg) {
?>
    <div class="alert alert-danger">
        <strong>Error!</strong> <?php echo $errmsg?>
    </div>
<?php
}

?>
<form id='this_form' action='?action=submit' method='post'>

	<div class="form-group">
		<label for="host">Host To Receive RPC:</label>
		
		<div class="input-group mb-3">
			<select id="host" name="host" class="form-control" >
			<?php
			foreach($hosts as $k=>$v) {
				echo "<option value='{$k}'".($k == $_POST['host'] ? " selected": "").">{$v}</option>";
			}
			?>
			</select>
			<div class="input-group-append">
				<span class="input-group-text">
					/
				</span>
			</div>
			
			<input class="form-control" type='text' name='path' id='path' value='<?php echo $_POST['path']?>' placeholder="Put extra path or blank if it does not.">
			
		</div>
	</div>
	
	<div class="form-group">
        <label for="jsonver">Json RPC version:</label>
        <input class="form-control" type='text' name='jsonver' id='jsonver' value='<?php echo $_POST['jsonver']?$_POST['jsonver']: "2.0"?>' readonly>
    </div>

	<div class="form-group">
	<label for="jsonver">Method:</label>
		<div class="input-group">
			<input class="form-control" type='text' name='method' id='method' value=''>
			<div class="input-group-append">
				<button class="btn btn-outline-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Select</button>
				<ul class="dropdown-menu w-100 shadow p-0" id="navbarDropdownMega">
					<li class="dropdown-item">
						<?php 
						$itemsPerRow = 4;
						foreach($apis as $k=> $api) {
							if ($k%$itemsPerRow == 0) {
							?>
							<div class="row">
							<?php
							}
							?>
								<div class="col-sm-3">
									<?php 
									if ($api) {
									?>
									<a href="#" onclick="$('input#method').val(this.innerHTML);return false;"><?php echo $api?></a>
									<?php
									}
									?>
								</div>
							<?php
							if (($k+1)%$itemsPerRow == 0) {
							?>
							</div>
							<?Php
							}
						}
						?>
					</li>
				</ul>
			</div>
		</div>
    </div>
	
	<div class="form-group">
		<label for="params">Params:</label>
		
		<div class="input-group mb-3">
			<input class="form-control" name='params' id='params'/>
			<div class="input-group-append">
				<input class="btn btn-success" type="button" value=" + " onclick="
				var self = $(this);
				self.val('...'); 
				
				var form = self.closest('form');
				
				$.ajax({
					url: '?ajax=1&action=add_json_request', 
					type: 'post',
					data: $('#this_form :input'),
					success:function(result){
						
						try {
							j = eval('(' + result + ')');
							
							if ('error' in j && j.error.length>0) {
								var error = true;
							} else {
								var error = false;
							}
							
							if (!error) {
								$('<input>').attr({
									type: 'text',
									name: 'requests[]',
									value: JSON.stringify(j.data),
									readonly: 'readonly',
									class: 'request-item',
									style: 'border-radius:5px;border:1px solid black;margin-right:5px;margin-top:25px;width:300px;'
								}).appendTo(form);
								
								
								var num = $('input[class=request-item]',form).length;
								
								$('input[type=submit]').val('Submit ('+num+' Request)');
							} else {
								alert(j.error);
							}
						} catch(e) {
							alert('Invalid Json Format.');
						}
					},
					complete:function() {
						self.val(' + ');
					}
				});
				"/>
			</div>
		</div>
		<small>
			Must be JSON-ARRAY encoded string, start with '[' and end with ']'.
		</small>
	</div>
	
    <input type='submit' class="btn btn-success btn-block" value="Submit (0 Requests)"/>
</form>
<?php
include_once("html_iframe_footer.php");