message: Fix misprints in payment design.
diff: @@ -533,7 +533,7 @@ pub fn indy_build_set_txn_fees_req(command_handle: i32,
  payment_method: *const c_char,
  fees_json: *const c_char,
  cb: Option<extern fn(command_handle_: i32,
  - err: ErroCode,
  + err: ErrorCode,
  set_txn_fees_json: *const c_char) -> ErrorCode>) -> ErrorCode {}
  /// Builds Indy get request for getting fees for transactions in the ledger
  @@ -547,7 +547,7 @@ pub fn indy_build_set_txn_fees_req(command_handle: i32,
  pub fn indy_build_get_txn_fees_req(command_handle: i32,
  payment_method: *const c_char,
  cb: Option<extern fn(command_handle_: i32,
  - err: ErroCode,
  + err: ErrorCode,
  get_txn_fees_json: *const c_char) -> ErrorCode>) -> ErrorCode {}
  /// Parses response for Indy request for getting fees
  