Expression functions help you extend your rule conditions to make transaction monitoring even more precise. For example, if you want to compare the applicant name with the name specified on the card that was used to make a payment, you can invoke the personNamesFuzzyIncompatible method and pass the arguments based on the expression attributes.

personNamesIncompatible

bool personNamesIncompatible(String applicantName, String fullName)

Checks the similarity of applicantName and fullName. Returns true if there is no similarity or the similarity is low.

Argument	Type	Description
`applicantName`	String	Applicant name.
`fullName`	String	Full name to compare with.

personNamesFuzzyIncompatible

bool personNamesFuzzyIncompatible(String applicantName, String fullName)

Checks the fuzzy similarity of applicantName and fullName. Returns true if there is no similarity or the similarity is low. E.g. Stüber Schäfler and Schaefler Stueber returns false.

Argument	Type	Description
`applicantName`	String	Applicant name.
`fullName`	String	Full name to compare with.

intersectsWithDict

bool intersectsWithDict(String str, Set dict)

Returns true if dict contains any token from str.

Argument	Type	Description
`str`	String	String to tokenize and check intersection with.
`dict`	Set	Set of strings.

inList

bool inList(String listName, String value)

Returns true if value is in the client list with the name listName.

Argument	Type	Description
`listName`	String	Client list name.
`value`	String	Value to check.

notInList

bool notInList(String listName, String value)

Returns true if value is not in the client list with the name listName.

Argument	Type	Description
`listName`	String	Client list name.
`value`	String	Value to check.

anyTokenInList

bool anyTokenInList(String listName, String value)

Returns true if any token from value is in the client list with the name listName.

Argument	Type	Description
`listName`	String	Client list name.
`value`	String	String to tokenize and check intersection with.

diffPctGte

bool diffPctGte(Double value1, Double value2, double pct)

Returns true if val1 greater than val2 increased by pct percentage. val1 > val2 + val2 * pct / 100.0.

Argument	Type	Description
`value1`	Double	First value.
`value2`	Double	Second value.
`pct`	Double	Percentage.

uniqTxnsByCounterpartyGroupCntGte

bool uniqTxnsByCounterpartyGroupCntGte(Object obj, Number minElementsInTheGroup, Number minGroupCnt)

Returns true if the count of groups that contain the number of elements is equal to or greater than minElementsInTheGroup is equal to or greater than minGroupCnt. For example, a player played X (minGroupCnt) games more than Y (minElementsInTheGroup) times.

Argument	Type	Description
`obj`	Object	List of transactions.
`minElementsInTheGroup`	Number	Minimum number of elements in the group.
`minGroupCnt`	Number	Minimum number of groups.

amountByTxnFieldInListGte

bool amountByTxnFieldInListGte(Object obj, String listName, String fieldPath, Number maxAmount)

Returns true if the sum amount in the default currency of transactions matched by fieldPath with the client list listName is not less than maxAmount.

Argument	Type	Description
`obj`	Object	List of transactions.
`listName`	String	Client list name.
`fieldPath`	String	Field path in the calculation context. The value from this field is checked in the client list, For example, `counterparty.paymentMethod.issuingCountry`.
`maxAmount`	Number	Maximum amount.

diffInDaysFromNowGte

bool diffInDaysFromNowGte(Object dateStr, int days)

Returns true if the date in dateStr differs from now in not less than days days.

Argument	Type	Description
`dateStr`	Object	String with date to extract and check the difference in days.
`days`	int	Number of days.

diffInDaysFromNowLte

bool diffInDaysFromNowLte(Object dateStr, int days)

Returns true if the date in dateStr differs from now in not more than days days.

Argument	Type	Description
`dateStr`	Object	String with date to extract and check the difference in days.
`days`	int	Number of days.

cntTxnsByMatchingTxnsWithPctAmountGte

bool cntTxnsByMatchingTxnsWithPctAmountGte(Object leftTxnsObj, Object rightTxnsObj, double diffPct, int thresholdCnt)

Returns true if the count of transactions in the left that are similar to the right (according to diffPct) is greater than or equal to thresholdCnt. E.g. for the last 7 days, the number of outgoing transactions that match the approximate amount of incoming transactions is greater than or equal to 3, then alert.

Argument	Type	Description
`leftTxnsObj`	Object	List of transactions.
`rightTxnsObj`	Object	List of transactions.
`diffPct`	Double	Diff percentage.
`thresholdCnt`	int	Count of similar transactions to trigger alert.

timeInRange

bool timeInRange(LocalDateTime localDateTime, String from, String to)

Checks whether the time of local date is in the specified time range: [from; to].

Argument	Type	Description
`localDateTime`	LocalDateTime	Date and time object.
`from`	String	Time in `HH:mm:ss` format.
`to`	String	Time in `HH:mm:ss` format.