How to use sendHexTransaction?

[zotakk4o]

Hi, guys,
I would really like to figure out how to use the sendHexTransaction API but I can't figure out how to obtain the protobuf encoded transaction hex string after sign. Any Ideas or examples you can help with?

[Satan-web3]

You can use txJsonToPb method to do it, for example:

const tx = await tronWeb.transactionBuilder.sendTrx(toAddress, 100*10e6);
const signedTx = await tronWeb.trx.sign(tx);
const pb = txJsonToPb(signedTx);
pb.addSignature(new Uint8Array(hexStr2byteArray(signedTx.signature[0])));
const result = await tronWeb.trx.broadcastHex(byteArray2hexStr(pb.serializeBinary()));

[zotakk4o]

Thank you but the problem is that when I use privateKey: "01" in order to be able to generate the transaction data I get the error
Validate signature error: db91f809aa4acd967e860847c42224d35a8161caea843b2146a90ea952dafd80160d1e53d3ed9f98708d4df3761ab65ed6ba0950bbe130e997c4dfe740b201f71b is signed by TJKKhrZJuNn3FD7diRSjCtpCSydnSPp8Zd but it is not contained of permission.

I have no access to the private key so I cannot instantiate the tronweb lib with it.