message: allow access to internal field transaction
diff: @@ -47,7 +47,7 @@ pub enum OutputPolicy {
  /// Transaction builder is an object to construct
  /// a transaction with iterative steps (inputs, outputs)
  pub struct TransactionBuilder<Address, Extra> {
  - tx: tx::Transaction<Address, Extra>,
  + pub tx: tx::Transaction<Address, Extra>,
  }
  impl TransactionBuilder<Address, tx::NoExtra> {
  