Struct ChainId 

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

A chain identifier for an Aptos network.

The chain ID is included in every transaction to ensure transactions cannot be replayed across different networks.

Known Chain IDs

• Mainnet: 1
• Testnet: 2
• Devnet: not fixed – devnet is reset periodically and its chain ID changes on each reset, so it must be fetched from the network rather than hardcoded.
• Localnet: typically 4, but depends on how the local node was configured.

Note: ChainId::default() returns testnet (2), not a local or devnet value.

Example

use aptos_sdk::ChainId;

let mainnet = ChainId::mainnet();
assert_eq!(mainnet.id(), 1);

let custom = ChainId::new(42);
assert_eq!(custom.id(), 42);

Implementations

impl ChainId

pub const fn new(id: u8) -> Self

Creates a new chain ID.

pub const fn mainnet() -> Self

Returns the chain ID for mainnet (1).

pub const fn testnet() -> Self

Returns the chain ID for testnet (2).

pub const fn id(&self) -> u8

Returns the numeric chain ID value.

pub const fn is_mainnet(&self) -> bool

Returns true if this is the mainnet chain ID.

pub const fn is_testnet(&self) -> bool

Returns true if this is the testnet chain ID.

Trait Implementations

impl Clone for ChainId

fn clone(&self) -> ChainId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ChainId

impl Debug for ChainId

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

Formats the value using the given formatter.

impl Default for ChainId

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ChainId

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ChainId

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

Formats the value using the given formatter.

impl Eq for ChainId

impl From<ChainId> for u8

fn from(chain_id: ChainId) -> Self

Converts to this type from the input type.

impl From<u8> for ChainId

fn from(id: u8) -> Self

Converts to this type from the input type.

impl Hash for ChainId

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

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 PartialEq for ChainId

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for ChainId

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ChainId