[Ride v6] Built-in functions

⚠️ This is the documentation for the Standard Library version 6, which becomes available after activation of feature #17 “Ride V6, MetaMask support”. Go to version 5

A built-in function is a function of the Standard library.

Account data storage functions

Name	Description	Complexity
getBinary(Address|Alias, String): ByteVector|Unit	Gets an array of bytes by key	10
getBinary(String): ByteVector|Unit	Gets an array of bytes by key from dApp's own data storage	10
getBinaryValue(Address|Alias, String): ByteVector	Gets an array of bytes by key. Fails if there is no data	10
getBinaryValue(String): ByteVector	Gets an array of bytes by key from dApp's own data storage. Fails if there is no data	10
getBoolean(Address|Alias, String): Boolean|Unit	Gets a boolean value by key	10
getBoolean(String): Boolean|Unit	Gets a boolean value by key from dApp's own data storage	10
getBooleanValue(Address|Alias, String): Boolean	Gets a boolean value by key. Fails if there is no data	10
getBooleanValue(String): Boolean	Gets a boolean value by key from dApp's own data storage. Fails if there is no data	10
getInteger(Address|Alias, String): Int|Unit	Gets an integer by key	10
getInteger(String): Int|Unit	Gets an integer by key from dApp's own data storage	10
getIntegerValue(Address|Alias, String): Int	Gets an integer by key. Fails if there is no data	10
getIntegerValue(String): Int	Gets an integer by key from dApp's own data storage. Fails if there is no data	10
getString(Address|Alias, String): String|Unit	Gets a string by key	10
getString(String): String|Unit	Gets a string by key from dApp's own data storage	10
getStringValue(Address|Alias, String): String	Gets a string by key. Fails if there is no data	10
getStringValue(String): String	Gets a string by key from dApp's own data storage. Fails if there is no data	10
isDataStorageUntouched(Address|Alias): Boolean	Checks if the data storage of a given account never contained any entries	10

Blockchain functions

Name	Description	Complexity
addressFromRecipient(Address|Alias): Address	Gets the corresponding address of the alias	5
assetBalancе(Address|Alias, ByteVector): Int	Gets account balance by token ID	10
assetInfo(ByteVector): Аsset|Unit	Gets the information about a token	15
blockInfoByHeight(Int): BlockInfo |Unit	Gets the information about a block by the block height	5
calculateAssetId(Issue): ByteVector	Calculates ID of the token formed by the Issue structure when executing the callable function	10
calculateLeaseId(Lease): ByteVector	Calculates ID of the lease formed by the Lease structure when executing the callable function	1
scriptHash(Address|Alias): ByteVector|Unit	Returns BLAKE2b-256 (opens new window) hash of the script assigned to a given account	200
transactionHeightById(ByteVector): Int|Unit	Gets the block height of a transaction	20
transferTransactionById(ByteVector): TransferTransaction|Unit	Gets the data of a transfer transaction	60
wavesBalance(Address|Alias): Int	Gets account balance in WAVES	10

Byte array functions

Name	Description	Complexity
drop(ByteVector, Int): ByteVector	Returns a given byte array without the first N bytes	6
dropRight(ByteVector, Int): ByteVector	Returns a given byte array without the last N bytes	6
size(ByteVector): Int	Returns the number of bytes in a byte array	1
take(ByteVector, Int): ByteVector	Returns the first N bytes of the byte array	6
takeRight(ByteVector, Int): ByteVector	Returns the last N bytes of the byte array	6

Converting functions

Name	Description	Complexity
addressFromPublicKey(ByteVector): Address	Converts account public key to address	1
parseBigInt(String): BigInt|Unit	Converts the string representation of a number to its big integer equivalent	65
parseBigIntValue(String): BigInt	Converts the string representation of a number to its big integer equivalent. Fails if the string cannot be parsed	65
parseInt(String): Int|Unit	Converts the string representation of a number to its integer equivalent	2
parseIntValue(String): Int	Converts the string representation of a number to its integer equivalent. Fails if the string cannot be parsed	2
toBigInt(ByteVector): BigInt	Converts an array of bytes to a big integer	65
toBigInt(ByteVector, Int, Int): BigInt	Converts an array of bytes starting from a certain index to a big integer	65
toBigInt(Int): BigInt	Converts an integer to a big integer	1
toBytes(Boolean): ByteVector	Converts a boolean to an array of bytes	1
toBytes(Int): ByteVector	Converts an integer to an array of bytes	1
toBytes(String): ByteVector	Converts a string to an array of bytes	8
toBytes(BigInt): ByteVector	Converts a big integer to an array of bytes	65
toInt(BigInt): Int	Converts a big integer to an integer. Fails if the number cannot be converted	1
toInt(ByteVector): Int	Converts an array of bytes to an integer	1
toInt(ByteVector, Int): Int	Converts an array of bytes to an integer starting from a certain index	1
toString(Address): String	Converts an address to a string	1
toString(BigInt): String	Converts a big integer to a string	1
toString(Boolean): String	Converts a boolean to a string	1
toString(Int): String	Converts an integer to a string	1
toUtf8String(ByteVector): String	Converts an array of bytes to a UTF-8 string	7
transferTransactionFromProto(ByteVector): TransferTransaction|Unit	Deserializes transfer transaction	5

dApp-to-dApp invocation functions

Name	Description	Complexity
invoke(Address|Alias, String, List[Any], List[AttachedPayments]): Any	Invokes a dApp callable function, with reentrancy restriction	75
reentrantInvoke(Address|Alias, String, List[Any], List[AttachedPayments]): Any	Invokes a dApp callable function, without reentrancy restriction	75

Data transaction functions

Name	Description	Complexity
getBinary(List[], String): ByteVector|Unit	Gets a binary value from a list of data entires by key	10
getBinary(List[], Int): ByteVector|Unit	Gets a binary value from a list of data entires by index	4
getBinaryValue(List[], String): ByteVector	Gets a binary value from a list of data entires by key. Fails if there is no data	10
getBinaryValue(List[], Int): ByteVector	Gets a binary value from a list of data entires by index. Fails if there is no data	4
getBoolean(List[], String): Boolean|Unit	Gets a boolean value from a list of data entires by key	10
getBoolean(List[], Int): Boolean|Unit	Gets a boolean value from a list of data entires by index	4
getBooleanValue(List[], String): Boolean	Gets a boolean value from a list of data entires by key. Fails if there is no data	10
getBooleanValue(List[], Int): Boolean	Gets a boolean value from a list of data entires by index. Fails if there is no data	4
getInteger(List[], String): Int|Unit	Gets an integer value from a list of data entires by key	10
getInteger(List[], Int): Int|Unit	Gets an integer value from a list of data entires by index	4
getIntegerValue(List[], String): Int	Gets an integer value from a list of data entires by key. Fails if there is no data	10
getIntegerValue(List[], Int): Int	Gets an integer value from a list of data entires by index. Fails if there is no data	4
getString(List[] String): String|Unit	Gets a string value from a list of data entires by key	10
getString(List[], Int): String|Unit	Gets a string value from a list of data entires by index	4
getStringValue(List[], String): String	Gets a string value from a list of data entires by key. Fails if there is no data	10
getStringValue(List[], Int): String	Gets a string value from a list of data entires by index. Fails if there is no data	4

Decoding functions

Name	Description	Complexity
addressFromString(String): Address|Unit	Decodes address from base58 (opens new window) string	1
addressFromStringValue(String): Address	Decodes address from base58 string. Fails if the address cannot be decoded	1
fromBase16String(String): ByteVector	Decodes base16 (opens new window) string to an array of bytes	10
fromBase58String(String): ByteVector	Decodes base58 (opens new window) string to an array of bytes	1
fromBase64String(String): ByteVector	Decodes base64 (opens new window) string to an array of bytes	40

Encoding functions

Name	Description	Complexity
toBase16String(ByteVector): String	Encodes array of bytes to base16 (opens new window) string	10
toBase58String(ByteVector): String	Encodes array of bytes to base58 (opens new window) string	3
toBase64String(ByteVector): String	Encodes array of bytes to base64 (opens new window) string	35

Exception functions

Name	Description	Complexity
throw()	Raises an exception	1
throw(String)	Raises an exception with a message	1

Hashing functions

Name	Description	Complexity
blake2b256(ByteVector): ByteVector	Range of functions. Hash an array of bytes using BLAKE2b-256 (opens new window)	13–136
keccak256(ByteVector): ByteVector	Range of functions. Hash an array of bytes using Keccak-256 (opens new window)	20–195
sha256(ByteVector): ByteVector	Range of functions. Hash an array of bytes using SHA-256 (opens new window)	12–118

List functions

Name	Description	Complexity
cons(A, List[B]): List[A|B]	Inserts element to the beginning of the list	1
containsElement(list: List[T], element: T): Boolean	Check if the element is in the list	5
getElement(List[T], Int): T	Gets element from the list	2
indexOf(List[T], T): Int|Unit	Returns the index of the first occurrence of the element in the list	5
lastIndexOf(List[T], T): Int|Unit	Returns the index of the last occurrence of the element in the list	5
max(List[Int]): Int	Returns the largest element in the list of integers	3
max(List[BigInt]): BigInt	Returns the largest element in the list of big integers	192
min(List[Int]): Int	Returns the smallest element in the list of integers	3
min(List[BigInt]): BigInt	Returns the smallest element in the list of big integers	192
removeByIndex(List[T], Int): List[T]	Removes an element from the list by index	7
size(List[T]): Int	Returns the size of the list	2

A, B, T means any valid type.

Math functions

Name	Description	Complexity
fraction(Int, Int, Int): Int	Multiplies and divides integers to avoid overflow	1
fraction(Int, Int, Int, Union): Int	Multiplies and divides integers to avoid overflow, applying the specified rounding method	1
fraction(BigInt, BigInt, BigInt): BigInt	Multiplies and divides big integers to avoid overflow	1
fraction(BigInt, BigInt, BigInt, Union): BigInt	Multiplies and divides big integers to avoid overflow, applying the specified rounding method	1
log(Int, Int, Int, Int, Int, Union): Int	Calculates logarithm of a number with a base	100
log(BigInt, Int, BigInt, Int, Int, Union): BigInt	Calculates logarithm of a number to a given base with high accuracy	200
median(List[Int]): Int	Returns the median of a list of integers	20
median(List[BigInt]): BigInt	Returns the median of a list of big integers	160
pow(Int, Int, Int, Int, Int, Union): Int	Raises a number to a given power	28
pow(BigInt, Int, BigInt, Int, Int, Union): BigInt	Raises a number to a given power with high accuracy	270
sqrt(Int, Int, Int, Union): Int	Returns the square root of a number	2
sqrt(BigInt, Int, Int, Union): BigInt	Returns the square root of a number with high accuracy	5

String functions

Name	Description	Complexity
contains(String, String): Boolean	Checks whether the string contains substring	3
drop(String, Int): String	Returns a given string without the first N characters	20
dropRight(String, Int): String	Returns a given string without the last N characters	20
indexOf(String, String): Int|Unit	Returns the index of the first occurrence of a substring	3
indexOf(String, String, Int): Int|Unit	Returns the index of the first occurrence of a substring after a certain index	3
lastIndexOf(String, String): Int|Unit	Returns the index of the last occurrence of a substring	3
lastindexOf(String, String, Int): Int|Unit	Returns the index of the last occurrence of a substring before a certain index	3
makeString(List[String], String): String	Range of functions. Concatenate list strings adding a separator	1–11
size(String): Int	Returns the size of a string	1
split(String, String): List[String]	Range of functions. Split a string delimited by a separator into a list of substrings	1–51
take(String, Int): String	Takes the first N characters from a string	20
takeRight(String, Int): String	Takes the last N characters from a string	20

Union functions

Name	Description	Complexity
isDefined(T|Unit): Boolean	Checks if an argument is not unit	1
value(T|Unit): T	Gets a value from a union type argument. Fails if it is unit	2
valueOrElse(T|Unit, T): T	Returns a value from a union type argument if it's not unit. Otherwise, returns the second argument	2
valueOrErrorMessage(T|Unit, String): T	Gets a value from a union type argument if it's not unit. Otherwise, fails with the message specified in the second argument	2

Verification functions

Name	Description	Complexity
bn256Groth16Verify(ByteVector, ByteVector, ByteVector): Boolean	Range of functions. Check zk-SNARK (opens new window) by groth16 protocol on the bn254 curve	800–1650
createMerkleRoot(List[ByteVector], ByteVector, Int) : ByteVector	Calculates the Merkle root hash for transactions of block	30
ecrecover(messageHash: ByteVector, signature: ByteVector)	Recovers public key from the message hash and the ECDSA (opens new window) digital signature	70
groth16Verify(ByteVector, ByteVector, ByteVector): Boolean	Range of functions. Check zk-SNARK (opens new window) by groth16 (opens new window) protocol on the bls12-381 curve	1200–2700
rsaVerify(digestAlgorithmType, ByteVector, ByteVector, ByteVector): Boolean	Range of functions. Check that the RSA (opens new window) digital signature is valid, i.e. it was created by the owner of the public key	500–1000
sigVerify(ByteVector, ByteVector, ByteVector): Boolean	Range of functions. Check that the Curve25519 (opens new window) digital signature is valid, i.e. it was created by the owner of the public key	43–180