"invalid sender" when sending a signed transaction on bsc on PHP

I'm trying to replicate a script that I have already running in nodejs in php.

On PHP I'm using "web3p/web3.php": "dev-master", "web3p/ethereum-tx": "^0.4.3" libraries.

When I send the signed transaction I'm always getting a "invalid sender" response. The transaction data is generated using 1inch.exchange API which works perfectly on nodejs.

I'm on PHP7.4 with GMP installed.

Here's a short version of my script

use Web3\Providers\HttpProvider; use Web3\RequestManagers\HttpRequestManager; use Web3p\EthereumTx\Transaction; $web3 = new Web3(new HttpProvider(new HttpRequestManager($_ENV['API_MORALIS_BSC_URL'], 10))); $eth = $web3->eth; $params = [ "fromAddress" => $_ENV['ADDRESS_1'], "fromTokenAddress" => $_ENV['COIN_1'], "toTokenAddress" => $_ENV['COIN_2'], "slippage" => 1, "amount" => "10000000000000000", ]; $client = new \GuzzleHttp\Client(['http_errors' => false, 'timeout' => 10]); $response = $client->get($_ENV['API_1INCH_BSC_URL']."swap", [ "query" => $params ]); $transactionParams = json_decode($response->getBody()->getContents(),true)['tx']; // TRANSACTION PARAMS // Array // ( // [from] => 0x3f9E320Fc------0DBA74d43c539a63bf // [to] => 0x11111112------e05771c2dccff4faa26 // [data] => 0x7c025200000000000000000000000000baf90------0000000000000000000000000000000000000000000000000cfee7c08 // [value] => 0 // [gas] => 198325 // [gasPrice] => 15000000000 // [nonce] => 1d4 // [chainId] => 38 // ) $transaction = new Transaction($transactionParams); $signedTransaction = '0x'.$transaction->sign($_ENV['PRIVATE_KEY_1']); $eth->sendRawTransaction($signedTransaction, function ($err, $tx) { $err->getMessage(); }); 

I'd tried with and without including nonce, from and chainid on the transaction params.

I'm using a Moralis node, but the same happens with an Ankr node. Both nodes work fine when I run the nodejs version of the script.

I've been struggling whit this for a few days now, any help will be appreciated.

Thanks!