org-mode spreadsheet formula, can one use the result of org-babel block?

After quite a bit of fighting trying to create a wrapper emacs-lisp function I found the org-sbe macro that solves this exact problem.

To make it work, I've changed TBLFM definition to the following:

#+TBLFM: $3='(org-sbe "currencyRateOnDate" (date $2))' 

org-sbe macro docs:

org-sbe org-sbe is a Lisp macro in `ob-table.el'.

(org-sbe SOURCE-BLOCK &rest VARIABLES)

Return the results of calling SOURCE-BLOCK with VARIABLES. Each element of VARIABLES should be a two element list, whose first element is the name of the variable and second element is a string of its value. The following call to `org-sbe' would be equivalent to the following source code block.

(org-sbe 'source-block (n $2) (m 3))

#+begin_src emacs-lisp :var results=source-block(n=val_at_col_2, m=3) :results silent results #+end_src

NOTE: by default string variable names are interpreted as references to source-code blocks, to force interpretation of a cell's value as a string, prefix the identifier a "$" (e.g., "$$2" instead of "$2" or "$@2$2" instead of "@2$2").

NOTE: it is also possible to pass header arguments to the code block. In this case a table cell should hold the string value of the header argument which can then be passed before all variables as shown in the example below.

| 1 | 2 | :file nothing.png | nothing.png | #+TBLFM: @1$4='(org-sbe test-sbe $3 (x $1) (y $2))