🛠️KUtils

KUTHULU Utilities. This is a shared library of commonly used functions.

append

Joins five strings together.

let a = 'Hello';
let b = ' my';
let c = ' name';
let d = ' is';
let e = ' John';
let result = contract.append(a, b, c, d, e);

Input

Name	Type	Description
a, b, c, d, e	string	The strings to be concatenated.

Output

Name	Type	Description
return value	string	The concatenated string.

_toLower

Converts all uppercase characters in a string to lowercase.

let str = 'Hello World';
let result = contract._toLower(str);

Input

Name	Type	Description
str	string	The string to be converted.

Output

Name	Type	Description
return value	string	The converted string.

strlen

Returns the length of a given string.

let str = 'Hello World';
let result = contract.strlen(str);

Input

Name	Type	Description
str	string	The string to get the length.

Output

Name	Type	Description
return value	uint256	The length of the string.

stringsEqual

Compares two strings for equality.

let str1 = 'Hello';
let str2 = 'Hello';
let result = contract.stringsEqual(str1, str2);

Input

Name	Type	Description
a, b	string	The strings to be compared.

Output

Name	Type	Description
return value	bool	True if the strings are equal, false otherwise.

URI and String Validation

isValidURI

Checks if the given string is a valid URI according to RFC3986 URI Generic Syntax.

let str = 'https://example.com';
let result = contract.isValidURI(str);

Input

Name	Type	Description
str	string	The string to be checked.

Output

Name	Type	Description
return value	bool	True if the string is a valid URI, false otherwise.

isValidGroupString

Checks if the given string is a valid group string.

let str = 'HelloWorld';
let result = contract.isValidGroupString(str);

Input

Name	Type	Description
str	string	The string to be checked.

Output

Name	Type	Description
return value	bool	True if the string is a valid group string, false otherwise.

isValidString

Checks if the given string is a valid string.

let str = 'HelloWorld';
let result = contract.isValidString(str);

Input

Name	Type	Description
str	string	The string to be checked.

Output

Name	Type	Description
return value	bool	True if the string is valid, false otherwise.

Integer to String Conversion

toString

Converts a uint256 value to its string representation.

let value = 123456;
let result = contract.toString(value);

Input

Name	Type	Description
value	uint256	The value to be converted.

Output

Name	Type	Description
return value	string	The string representation of the input value.

addressToString

Converts an Ethereum address to its string representation.

let addr = '0x742d35Cc6634C0532925a3b844Bc454e4438f44e';
let result = contract.addressToString(addr);

Input

Name	Type	Description
addr	address	The address to be converted.

Output

Name	Type	Description
return value	string	The string representation of the input address.