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()));