List of Blocks

The sections below contain information about the blocks available to build lambda processes, organized according to the categories shown in the lambda processes editor left panel.

Note

You can also hover over a block to see a brief description of its purpose.

Registers are data repositories where you can store any value, relating it to a numeric identifier. The register where information will be saved or read from depends on the context of execution (app, module, or component). The blocks in this category allow you to assign a value to a register, obtain a value from a register, clean a register and create constant values.

Get

register number (0)	Obtains the value of a register as a number. This block converts the value of a register to number, accepting integers, decimals and the Veritran notation "N+XXX".
register text (0)	Obtains the value of a register as text.
get [STATIC/CUSTOM] encrypted value from register (0)	Obtains the desencrypted value from registers set as encrypted (static or custom). It is equivalent to the SE and CE formats used with the #S expression.

Dump

save register (0) with value ( )

Saves a value within a register. Accepts text or numbers (integers or decimals).

Clean

clean all images	Clears the value of all registers used to store images.
clean all registers	Clears the value of all registers. Warning This operation can delete important information, use with caution.
clean register (0)	Clears the value of a specific register.

Constants

parameter ( )	Obtains a parameter defined by users in Studio. It is the equivalent to the use of the #P expression. Click the field and select one of the parameters available.
constant (" ")	Obtains the value of the constant defined. It is equivalent to the use of the #K expression.

Profiling

get profile for transaction code (" ") and attribute (" ") with default value (" ")

Obtains the value of a profiling JSON attribute. It is equivalent to the use of the #R expression.

Arrays are data repositories with a numerical identifier. In the Veritran format, one-dimensional arrays are represented as lists, and two-dimensional arrays are represented as tables. For example, arrays allow you to access to a table with the user's bank accounts and each account information (such as the account number, balance and last transaction) previously obtained through a transactionand to perform different actions using this information.

Each item in an array has an index number that represents its position within the array. Veritran arrays have their row 0 and column 0 reserved for selector and tags information, so storage of data begins at index position 1.

Arrays

clean all arrays	Clears the value of all arrays.
clean array (0)	Clears the value of a specific array.

List

[Get] array list value (0) on index (0)	Obtains the value of a specific index from a defined array. This block solves the expression `#A{ArrayId:Row:Column;Format} #A{ArrayId:0:index;Format}`.
[Get] array list (0)	Obtains a one-dimensional array as a list of texts (the javascript equivalent is `string[]`). If the array is saved as a table, it is converted to a `string[]` including the first cell of each row added to the list.
[Dump] set cell to array list (0) with value (" ") on index (0)	Sets a value to a specific one-dimensional array.
[Dump] save array (0) with list array of ( ) ( ) ( )	Sets a list of values to an array. Click - to delete a value or click + to add more values. You can add as many values as you need but the array must contain at least one value.

Table

[Get] array table value (0) on row (0) and column (0)	Obtains the value of a specific row and column from the defined array.
[Get] array table row (0) on index (0)	Obtains the list of values of a specific row from the defined array.
[Get] array table (0)	Obtains a two-dimensional array as a table of texts (the javascript equivalent is `string[][]`). In case the array was saved as a list, it automatically converts into a one-column list.
[Dump] set cell to array table (0) with value ( ) on row (0) and column (0)	Sets a single value to the position in a specific row and column from the defined array.
[Dump] set row to array table (0) with list ( ) on index (0)	Saves a list to an array table as a row in a specific position.
[Dump] add row to array table (0) with list ( )	Saves a list to an array table as a new row.
[Dump] save array (0) with table ()	Saves a two-dimensional array as a table.
[Clean] remove row from array table (0) on index (0)	Removes a specific row from a table.

Selector

[Get] selected row on table (0)	Obtains the index position of the table row selected.
[Dump] unselect row on table (0)	Clears the selected row on a table.
[Dump] select row (0) on table (0)	Selects a specific row on a table.

Loop blocks allow you to execute a set of actions multiple times. They are helpful for tasks that need to be repeated, such as iterating through a list of items. For example, loops allow you to go through a list of accounts to obtain the current balance of a specific account.

repeat (0) times do	Repeats an action the specified number of times.
while <true/false> do	Repeats an action while a boolean condition is true or false.
for (index) from (0) to (0) do	Repeat an action a specified number of times, from 0 (zero) to the specified number, with the index constantly incrementing.
for element (value) of (list) do	Repeats an action over every item in a list. This block is used to go through a list or array.
break	Breaks out of the current loop and continues running the process.
continue	Skips the rest of the code in a loop and starts the loop again.
on start	Starts the connection of blocks to create the main statement, which will run first when executing the lambda process. By default, the editor opens with the on start block already placed on the canvas.

Branch blocks allow you to create conditional statements, control program flow, and execute specific actions based on predefined conditions. For example, conditionals allow you to identify which accounts are accounts in USD to then perform a specific action over these accounts only, such as adding up and retrieving the total balance in USD.

Conditionals

if <true/false> then	Executes the action defined within the socket, if a certain condition is true or false.
if <true/false> then else	Executes the action defined within the first socket, if a certain condition is true or false. Otherwise, it executes the action defined within the second socket.

Comparison

(0) = (0)	Compares two numeric values and returns true or false based on whether the condition is met. The conditions available are: equal to (=), not equal to (≠), greater than (>), greater than or equal to (≥), less than (<), and less than or equal to (≤).
(0) < (0)	Compares two numeric values and returns true or false based on whether the condition is met. The conditions available are: equal to (=), not equal to (≠), greater than (>), greater than or equal to (≥), less than (<), and less than or equal to (≤).
(" ") = (" ")	Compares two text values and returns true or false based on whether the condition is met. The conditions available are: equal to (=), not equal to (≠), greater than (>), greater than or equal to (≥), less than (<), and less than or equal to (≤).

Boolean

< > and < >	Allows you to compare multiple conditions. Returns true if both statements are true, false otherwise.
< > or < >	Allows you to compare multiple conditions. Returns true if either statement is true and false if neither statement is true.
not < >	Inverts the value of a true/false statement. This means that it returns true if the input is false, and it returns false if the input is true.
<true>	Returns true. This block is often used within other control blocks (conditionals and loops) to help determine if a certain condition is true and, consequently, perform a specified action.
<false>	Returns false. This block is often used within other control blocks (conditionals and loops) to help determine if a certain condition is false and, consequently, perform a specified action.

Functions contain encapsulated logic that can be invoked from another statement (the main statement or another function). Functions help you improve the readability of your lambda process. You may add three types of parameters to a function: text, boolean or number. When creating a new function, two blocks become available:

return (0)	Returns a value if the conditions set within the function are met. Adding multiple return blocks to a function allows you to provide different output values depending on specific conditions set within the function.
call (function name)	Invokes the function previously created and configured. This option is available as an action block and as a round-shaped (value) block.

List blocks allow you to work with lists or arrays of elements, and execute actions such as: adding or removing items from a list, accessing specific items by their position, and sorting items. Each item in a list has an index number that represents its position within the list.

Create

set [list] to array of (0) (0)	Creates a list of numbers and assigns a variable to that list.
set [text list] to array of (0) (0) (0)	Creates a list of text strings and assigns a variable to that list.
empty array	Creates an empty array.

Read

length of array (list)	Analyzes a list and returns the length of a list as a number.
(list) get value at (0)	Obtains the value saved in a specific item (index number) in a list.
(list) get and remove value at (0)	Obtains and removes an item's value at a certain position (index number).
get and remove last value from (list)	Obtains and removes the last item's value (last index number) in a list.
get and remove first value from (list)	Obtains and removes the first item's value (first index number) in a list.
get random value from (list)	Obtains a random item's value (random index number) in a list.

Modify

(list) set value at (0) to ( )	Replaces the value saved in a specific item (index number) in a list.
(list) add value ( ) to end	Adds a new value as an item at the end of the list.
remove last value from (list)	Removes the last item's value (last index number) in a list.
remove first value from (list)	Removes the first item's value (first index number) in a list.
(list) insert ( ) at the beginning	Adds a new value as an item at the beginning of the list. This option is available as an action block and as a round-shaped (value) block.
(list) insert at (0) value ( )	Adds a value to an item at a certain position (index number).
(list) remove value at (0)	Removes the value from an item at a certain position (index number).

Operations

(list) find index of ( )	Finds the index number of a certain value in the list.
reverse (list)	Reverses the position of all the elements in a list.

Math blocks allow you to manipulate numerical data, perform calculations, and use math functions or formulas to solve problems.

(0) + (0)	Allows you to add two numbers.
(0) - (0)	Allows you to substract two numbers.
(0) x (0)	Allows you to multiply two numbers.
(0) ÷ (0)	Allows you to divide two numbers.
(0)	Specifies a number you want to use in your app.
remainder of (0) ÷ (1)	Returns the remainder when a number is divided by another number.
[min] of (0) and (0)	Returns the smaller of two numbers.
[max] of (0) and (0)	Returns the bigger of two numbers.
absolute of (0)	Returns the absolute value of a number. That is to say, the distance of a number from zero. For example, 2 and −2 have the same absolute value (2).
[square root] of (0)	Returns the square root of a number.
[round] (0)	If a number has a fractional part, this block makes the number change to the closest, next integer value. If the number has a fractional part greater than or equal to 0.5, the number will round up to the next whole integer value with the higher value. Otherwise, it will round down to the next lowest integer value. For example, rounding the number 6.78 will return 7 and rounding 9.3 will return 9.
parse number (0) to VT notation	Turns a number in decimal notation to Veritran notation (N+XXX). For example, the number 4.65 becomes 2+465.
round number (0) with decimals (0)	If a number has a fractional part with several decimal numbers, this block makes the number change to the closest value with the number of decimals defined in the second socket. For example, rounding the number 6.78787878 with 2 decimals, will return 6.79 and rounding 9.3333333 with 2 decimals will return 9.33.
pick random (0) to (10)	Returns a random integer within a specified range, inclusive of the provided integers.

Text blocks handle and manipulate textual information and allow you to work with strings of characters, words, or sentences.

(" ")	Allows you to type text directly into a block.
length of ("Hello")	Returns the character length of a given string as a number.
join ("Hello") ("World")	Allows you to join two or more text values together.
(" ") has sequence (" ")	Determines whether a string contains the characters of a specified sequence.
propercase (" ")	Sets a text string to propercase (the first letter of each word becomes uppercase and all the others become lowercase).
lowercase (" ")	Sets a text string to lowercase.
uppercase (" ")	Sets a text string to uppercase.
color hex ( ) as string numeral	Returns a color selected from a hex color picker as a numeric string.
text (" ") match regex (" ")	Evaluates if a string matches a regular expression and returns a boolean value (true or false).
replace in text (" ") occurrences of (" ") with (" ")	Finds and replaces texts within a text string.
pad (" ") right with (" ") and repeat (0) times	Adds a string to the right side of another string as many times as specified.
pad (" ") left with (" ") and repeat (0) times	Adds a string to the left side of another string as many times as specified.
trim right (" ")	Trims blank spaces from the right side of a string of text. It returns the reformatted text.
trim left (" ")	Trims blank spaces from the left side of a string of text. It returns the reformatted text.
trim (" ")	Trims blank spaces from both sides of a string of text. It returns the reformatted text.
parse to number ("123")	Returns an integer number value for the text number in the string.
split ("this") at (" ")	Splits a string into smaller strings using a separator to divide it. The string to be split is defined in the first socket of the block and the separator in the second socket.
("this") includes (" ")	Determines whether a string contains the characters of a specified string.
("this") find index of (" ")	Gets the index (position) of the first occurrence of a specified value in a string.
("this") is empty	Determines whether a text string has any characters in it or not.
substring of ("this") from (0) of length (10)	Returns the substring at the specified start and end position, where 1 is the first letter of the string.
compare ("this") to (" ")	Compares two text strings based on the order of their characters.
char from ("this") at (0)	Gets a character (letter, number, or symbol) from a specific position in a text string. For example, in the text string "hello", the character at position 5 is "o".
text from char code (0)	Returns the letter or symbol represented by the selected character code number in a character set.

Transactions blocks can invoke configurable or native transactions, which allow you to implement complex business logic in your app by integrating with services, APIs and databases exposed by a third party or client, or with Veritran's services.

Error event

on transaction (this) fail with timeout	Event triggered by timeout error. This block masks the error branch configuration of transaction steps for the timeout event LOCAL UA563.
on transaction (this) fail with no connection	Event triggered by no connection error. This block masks the error branch configuration of transaction steps for the no connection event LOCAL UA233.
on transaction (this) with error type [error] and codes ( )	Defines how to handle transactions custom errors.

Execute

execute transaction ( )	Executes a synchronous transaction and waits for a response before executing the next step. If an error occurs, it looks for execution-related events (or global events) and interrupts the process.
execute async transaction () with next (" ") and message (" ")	Executes an asynchronous transaction. Does not wait for a response before executing the next step. Optionally, you can set a next step and specify a message to obtain when the transaction is finalized.

Transactions

Transactions blocks cannot be found within the list of blocks displayed on the left panel. Use the search bar next to the canvas to look for a transaction by its code.

Transactions blocks contain the following information: On the first line, the product, the transaction code and the transaction name. Then, for each input, a letter indicating if it is a register (R) or an array (A), its number and description, and its value. If no information is provided in the value field, the value set for the register is used. Finally, for each output, a letter indicating if it is a register (R) or an array (A), its number and description.

Call API blocks are related to the mechanism that calls APIs of custom functionalities integrated with the platform. Since call APIs are implemented natively for each platform (web or mobile), the ability to use them depends on the permissions granted in each binary. These permissions are validated before the call is executed.

Result Fail

on call api (this) fail with error (code)

Event triggered when the call API ends with an unexpected result (any result other than 000). The event returns the error code specified for each call API.

Execute

execute call api ( )	Executes a call API function.
execute call api ( ) and response code	Executes a call API function and returns the response code.
execute call api < > and response success	Executes a call API function and returns a boolean upon success code. Returns `true` if the result is 000, otherwise returns `false`.

Call APIs

Dynamic subcategories and blocks generated upon creation of call APIs in the middleware. For each call API available in your environment, there are function blocks available that allow you to use the integration functionalities.

Note

Contact the Mobile Product team to obtain more information about a specific call API and its configuration.

Devtools contains two different types of blocks that are specifically used to perform actions on Devtools, the runtime debugging and analysis tool.

snapshot context (" ")	Allows you to take a snapshot, or capture the app's information, and visualize it in Devtools. This block takes a picture of the application and captures the arrays and registers values in that exact moment to later visualize them on Devtools as a new context. To learn more about this tool, read Devtools.
console log (" ")	Allows you to log data and visualize it in the Devtools console.

Next blocks contain the stack of actions that will try to be executed in order as soon as the process is finished. For example, invoking a screen or another process, or triggering an event on a screen component.

Clean

clean next stack commands

Clears the entire next stack. This allows you to reformulate the stack or to simply abort calling any actions.

Screen

request next render view ( )	Adds a screen request to the stack. This block solves the expression `V{view}`.
request next render sequence ( ) into layout ( ) for view ( )	Adds a sequence request to the stack. This block solves the expression `V{view}\|{layout}:{sequence}`.

Component

request next event ( ) for group (" ")	Adds a component group event request to the stack. This block solves the expression `G{groupname}({event})`.
request next event ( ) for component (" ")	Adds a component event request to the stack. This block solves the expression `E{component}({event})`.

Logic

request next process ( )	Adds a legacy process request to the stack. This block solves the expression `P{process}`
request next lambda ( )	Adds a lambda process request to the stack. This block solves the expression `Z{lambda}`

Command

request next command (" ")

Adds a command request to the stack. This block allows you to write expressions not yet supported or added as blocks.

Error blocks contain the error handling mechanism, which can execute a series of actions depending on the unexpected trigger event.

on error default	Default event triggered by any error that doesn't have a specific error block assigned.
on error with type [ ] and code (" ")	Event triggered by an error with a specific type and code. This block allows you to select the type of error between EVENT, ERROR and LOCAL, and to enter the error code as text.
on error with [ ]	Event triggered by a specific known error. This block allows you to select an error from a list of main errors (UA233, UA563, ZZZ, UPDATEAPP, UPDATECONFIG).

JSON blocks allow you to parse and obtain values from JSON attributes or lists while creating the process.

Create

set [jsonobject] to (create json object from serialized string (" "))	Creates a JSON object from a well structured JSON string and assigns a variable to that object.
set [jsonobject] to (create json object)	Creates an empty JSON object and assigns a variable to that object.

Serialize

serialize json object (jsonobject)

Obtains a well-structured JSON string from a JSON object.

Read

get json object for (" ")	Given a JSON object, this block obtains the specified JSON object attribute.
get boolean for (" ")	Given a JSON object, this block obtains the specified boolean attribute (true or false).
get boolean for (" ") with default <true/false>	Given a JSON object, this block obtains the specified boolean attribute (true or false). If the attribute is not found, it returns a default true/false.
get number for (" ")	Given a JSON object, this block obtains the specified number attribute.
get number for (" ") with default <true/false>	Given a JSON object, this block obtains the specified number attribute. If the attribute is not found, it returns a default true/false.
get string for (" ")	Given a JSON object, this block obtains the specified string attribute.
get string for (" ") with default <true/false>	Given a JSON object, this block obtains the specified string attribute. If the attribute is not found, it returns a default true/false.
get number list for (" ")	Given a JSON object, this block obtains the specified number list attribute.
get string list for (" ")	Given a JSON object, this block obtains the specified string list attribute.
get json object list for (" ")	Given a JSON object, this block obtains the specified JSON object list attribute.

Write

set json object with ( ) for (" ")	Creates a JSON object attribute within a parent JSON object.
set boolean with <true/false> for (" ")	Creates a boolean attribute within a parent JSON object.
set string with (" ") for (" ")	Creates a string attribute within a parent JSON object.
set number with (0) for (" ")	Creates a number attribute within a parent JSON object.
set number list with ( ) for (" ")	Creates a number list attribute within a parent JSON object.
set string list with ( ) for (" ")	Creates a string list attribute within a parent JSON object.
set json object list with ( ) for (" ")	Creates a JSON object list attribute within a parent JSON object.

In this section:

(variable name)	Invokes the value stored in the variable.
set (variable name) to (0)	Stores a value in the variable.
change (variable name) by (0)	Incrementally changes the variable by the defined number.

Veritran Docs

List of Blocks

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