BroadcastTransaction

java.lang.Object
- nxt.http.APIServlet.APIRequestHandler
- - nxt.http.BroadcastTransaction

```
public final class BroadcastTransaction
extends APIServlet.APIRequestHandler
```
The purpose of broadcast transaction is to support client side signing of transactions. Clients first submit their transaction using CreateTransaction without providing the secret phrase.
In response the client receives the unsigned transaction JSON and transaction bytes.
The client then signs and submits the signed transaction using BroadcastTransaction
The default wallet implements this procedure in nrs.server.js which you can use as reference.
BroadcastTransaction accepts the following parameters:
transactionJSON - JSON representation of the signed transaction
transactionBytes - row bytes composing the signed transaction bytes excluding the prunable appendages
prunableAttachmentJSON - JSON representation of the prunable appendages

Clients can submit either the signed transactionJSON or the signed transactionBytes but not both.
In case the client submits transactionBytes for a transaction containing prunable appendages, the client also needs to submit the prunableAttachmentJSON parameter which includes the attachment JSON for the prunable appendages.

Prunable appendages are classes implementing the Appendix.Prunable interface.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected boolean`	`allowRequiredBlockParameters()`
`protected org.json.simple.JSONStreamAware`	`processRequest(javax.servlet.http.HttpServletRequest req)`
`protected boolean`	`requirePost()`

Methods inherited from class nxt.http.APIServlet.APIRequestHandler
getAPITags, getFileParameter, getParameters, isPassword, isTextArea, processRequest, requireBlockchain, requireFullClient, requirePassword, startDbTransaction

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - processRequest
```
protected org.json.simple.JSONStreamAware processRequest(javax.servlet.http.HttpServletRequest req)
                                                  throws ParameterException
```
    Specified by:
    
    processRequest in class APIServlet.APIRequestHandler
    
    Throws:
    
    ParameterException
  - requirePost
```
protected boolean requirePost()
```
    Overrides:
    
    requirePost in class APIServlet.APIRequestHandler
  - allowRequiredBlockParameters
```
protected final boolean allowRequiredBlockParameters()
```
    Overrides:
    
    allowRequiredBlockParameters in class APIServlet.APIRequestHandler