unable to decode txs

[TangMonk]

in your example code:

https://github.com/metachris/flashbotsrpc/blob/master/examples/callBundle/main.go

it return error with relay error response: unable to decode txs

[KuwaTakushi]

Use raw transaction hash
signedTx, err := types.SignTx(transaction, types.NewEIP155Signer(chainID), privateKey)
if err != nil {
log.Fatal("Failed to sign transactionB: ", err)
}

	rawTxABytes, err := signedTxA.MarshalBinary()
	if err != nil {
		log.Fatal(err)
	}
	rawTxHex := "0x" + hex.EncodeToString(rawTxBytes)