Struct Address 

pub struct Address(/* private fields */);

An Address is just a H256 with a different name. Has a different ABI name than H256.

Note: we are currently using ManagedAddress in contracts. While this also works, its use in contracts is discouraged.

Implementations

impl Address

pub const fn new(bytes: [u8; 32]) -> Address

Creates a new Address from a 32-byte array.

pub const fn from_hex(hex_str: &str) -> Address

Constructs an Address from a hex string at compile time. The hex string can optionally start with “0x” or “0X”. The hex string must represent exactly 32 bytes (64 hex characters).

Panics

Panics at compile time if:

• The hex string is not exactly 64 characters (excluding optional “0x” prefix)
• Any character is not a valid hex digit (0-9, a-f, A-F)

Example

const ADDR: Address = Address::from_hex("0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef");
const ADDR_WITH_PREFIX: Address = Address::from_hex("0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef");

pub fn shard_of_3(&self) -> ShardId

Returns the shard ID of this address in a 3-shard configuration.

pub fn to_bech32(&self, hrp: &str) -> Bech32Address

Encodes the address as a bech32 string using the given human-readable part (HRP).

pub fn to_bech32_default(&self) -> Bech32Address

Encodes the address as a bech32 string using the default HRP (erd).

pub fn to_hex(&self) -> String

Returns the address as a lowercase hex string (64 characters, no prefix).

impl Address

pub fn from_slice(slice: &[u8]) -> Address

Constructs an Address from a byte slice. Pads with zeros if shorter than 32 bytes, truncates if longer.

impl Address

pub fn zero() -> Address

Returns a new address of 32 zeros. Allocates directly in heap. Minimal resulting wasm code (14 bytes if not inlined).

pub fn len_bytes() -> usize

Returns the size of an address in bytes.

pub fn as_bytes(&self) -> &[u8]

Extracts a byte slice containing the entire fixed hash.

pub fn as_array(&self) -> &[u8; 32]

Returns a reference to the underlying 32-byte array.

pub fn copy_to_array(&self, target: &mut [u8; 32])

Copies the address bytes into the provided 32-byte array.

pub fn to_vec(&self) -> Vec<u8>

Returns the address bytes as a heap-allocated Vec<u8>.

pub fn as_ptr(&self) -> *const u8

Pointer to the data on the heap.

pub fn as_mut_ptr(&mut self) -> *mut u8

Returns an unsafe mutable pointer to the data on the heap. Used by the API to populate data.

pub fn is_zero(&self) -> bool

True if all 32 bytes of the hash are zero.

pub fn is_smart_contract_address(&self) -> bool

Returns true if this address belongs to a smart contract. A smart contract address has its first 8 bytes set to zero.

pub fn is_smart_contract_on_metachain(&self) -> bool

Returns true if this is a smart contract address deployed on the metachain. Conditions:

1. The last two bytes are both 0xFF (metachain identifier).
2. The address is a smart contract address (first 8 bytes are zero).
3. Bytes [10..25] (the “on-meta” region) are all zero.

Trait Implementations

impl AsMut<[u8]> for Address

fn as_mut(&mut self) -> &mut [u8]

Converts this type into a mutable reference of the (usually inferred) input type.

impl AsRef<[u8]> for Address

fn as_ref(&self) -> &[u8]

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for Address

fn clone(&self) -> Address

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Address

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Display for Address

Available on crate feature std only.

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Eq for Address

impl<'a> From<&'a Address> for &'a H256

fn from(address: &'a Address) -> &'a H256

Converts to this type from the input type.

impl<'a> From<&'a [u8; 32]> for Address

fn from(bytes: &'a [u8; 32]) -> Address

Converts to this type from the input type.

impl<'a> From<&'a mut [u8; 32]> for Address

fn from(bytes: &'a mut [u8; 32]) -> Address

Converts to this type from the input type.

impl From<Address> for H256

fn from(address: Address) -> H256

Converts to this type from the input type.

impl From<Box<[u8; 32]>> for Address

fn from(bytes: Box<[u8; 32]>) -> Address

Converts to this type from the input type.

impl From<H256> for Address

fn from(hash: H256) -> Address

Converts to this type from the input type.

impl From<[u8; 32]> for Address

fn from(arr: [u8; 32]) -> Address

Converts to this type from the input type.

impl Hash for Address

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl NestedDecode for Address

fn dep_decode_or_handle_err<I, H>( input: &mut I, h: H, ) -> Result<Address, <H as DecodeErrorHandler>::HandledErr>

where I: NestedDecodeInput, H: DecodeErrorHandler,

Version of dep_decode that can handle errors as soon as they occur. For instance in can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.

fn dep_decode<I>(input: &mut I) -> Result<Self, DecodeError>

where I: NestedDecodeInput,

Attempt to deserialise the value from input, using the format of an object nested inside another structure. In case of success returns the deserialized value and the number of bytes consumed during the operation.

impl NestedEncode for Address

fn dep_encode_or_handle_err<O, H>( &self, dest: &mut O, h: H, ) -> Result<(), <H as EncodeErrorHandler>::HandledErr>

where O: NestedEncodeOutput, H: EncodeErrorHandler,

Version of dep_encode that can handle errors as soon as they occur. For instance in can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.

fn dep_encode<O>(&self, dest: &mut O) -> Result<(), EncodeError>

where O: NestedEncodeOutput,

NestedEncode to output, using the format of an object nested inside another structure. Does not provide compact version.

impl PartialEq for Address

fn eq(&self, other: &Address) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for Address

impl TopDecode for Address

fn top_decode_or_handle_err<I, H>( input: I, h: H, ) -> Result<Address, <H as DecodeErrorHandler>::HandledErr>

where I: TopDecodeInput, H: DecodeErrorHandler,

Version of top_decode that can handle errors as soon as they occur. For instance it can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.

fn top_decode<I>(input: I) -> Result<Self, DecodeError>

where I: TopDecodeInput,

Attempt to deserialize the value from input.

impl TopEncode for Address

fn top_encode_or_handle_err<O, H>( &self, output: O, h: H, ) -> Result<(), <H as EncodeErrorHandler>::HandledErr>

where O: TopEncodeOutput, H: EncodeErrorHandler,

Version of top_encode that can handle errors as soon as they occur. For instance in can exit immediately and make sure that if it returns, it is a success. By not deferring error handling, this can lead to somewhat smaller bytecode.

fn top_encode<O>(&self, output: O) -> Result<(), EncodeError>

where O: TopEncodeOutput,

Attempt to serialize the value to output.