Script Logic: Using Function as a BADI Parameter

HI, Experts,

I don't know exactly how to use *FUNCTION at script logic. is there any documentation? May anybody pass the link?

Now, we are using SAP BPC 10.o NW.

We have a script logic with a BADI and we would like to pass parameters that change by a function.

The logic is something like that below. May anybody helps me? Can I use *FUNCTION inside the logic script or I need to move to mdxlib?

*FUNCTION DIA_PGTO()

IIF((([SALESAGREEMENT].CURRENTMEMBER.PROPERTIES("SELLERTYPE"))="INTERNO"),"05",IIF(RIGHT(([SALESAGREEMENT].CURRENTMEMBER.PROPERTIES("RECEIPTMONTHADJ")),2)<="07","10",IIF(RIGHT(([SALESAGREEMENT].CURRENTMEMBER.PROPERTIES("RECEIPTMONTHADJ")),2)<="15","18","10")))

*ENDFUNCTION

*FUNCTION MES_PGTO()

IIF((([SALESAGREEMENT].CURRENTMEMBER.PROPERTIES("SELLERTYPE"))="INTERNO"),1,IIF(RIGHT(([SALESAGREEMENT].CURRENTMEMBER.PROPERTIES("RECEIPTMONTHADJ")),2)>"15",2,1)))

*ENDFUNCTION

*FUNCTION MES_FIXO()

IIF((([SALESAGREEMENT].CURRENTMEMBER.PROPERTIES("SELLERTYPE"))="INTERNO"),"NULO",([SALESAGREEMENT].CURRENTMEMBER.PROPERTIES("RECEIPTMONTHADJ")))

*ENDFUNCTION

%AUX_DIA_PGTO% = DIA_PGTO()

//*START_BADI SLS_BADI_BUSCA_DIA_UTIL

//PARAM_TIPO_DATA = UTIL

//PARAM_DIA=%AUX_DIA_PGTO%           // DIA 07 POR EXEMPLO (2 CASAS DECIMAIS

//PARAM_ADIC_DIA=0           //  NÃO ADICIONA NENHUM DIA

//PARAM_MES=MES_PGTO()               // MES SEGUINTE

//PARAM_DIRECAO=1      // 1 PARA FRENTE E  0 PARA TRÁS

//PARAM_METRICA=PGTOCOMISSAOVENDA     // NOME DA MÉTRICA DESTINO

//PARAM_MES_FIXO=MES_FIXO()   // UTILIZAR O MÊS DE CADA  REGISTRO COMO BASE DE CÁLCULO

//QUERY=ON

//WRITE=ON

//*END_BADI