message: clean transaction builder
diff: @@ -68,8 +68,6 @@ export class TransactionBuilder extends BaseTransactionBuilder {
  transactionData = this.buildWalletInitializationTransaction();
  break;
  case TransactionType.Send:
  - transactionData = this.buildSendTransaction();
  - break;
  case TransactionType.SendToken:
  transactionData = this.buildSendTransaction();
  break;
  @@ -132,15 +130,9 @@ export class TransactionBuilder extends BaseTransactionBuilder {
  });
  break;
  case TransactionType.Send:
  - if (transactionJson.to === undefined) {
  - throw new BuildTransactionError('Undefined recipient address');
  - }
  - this._contractAddress = transactionJson.to;
  - this._transfer = new TransferBuilder(transactionJson.data);
  - break;
  case TransactionType.SendToken:
  if (transactionJson.to === undefined) {
  - throw new BuildTransactionError('Undefined contract address');
  + throw new BuildTransactionError('Undefined recipient address');
  }
  this._contractAddress = transactionJson.to;
  this._transfer = new TransferBuilder(transactionJson.data);
  