Struct EnvData 

pub struct EnvData {
    pub prime_root_pid: Option<Principal>,
    pub subnet_type: Option<SubnetRole>,
    pub subnet_pid: Option<Principal>,
    pub root_pid: Option<Principal>,
    pub canister_type: Option<CanisterRole>,
    pub parent_pid: Option<Principal>,
}

EnvData

prime_root_pid : passed to the root during install arguments. parent_pid : passed to the root during install arguments.

All other fields are derived during install/upgrade and cached locally so every canister can answer questions about its environment without touching global state.

Fields

prime_root_pid: Option<Principal>

subnet_type: Option<SubnetRole>

subnet_pid: Option<Principal>

root_pid: Option<Principal>

canister_type: Option<CanisterRole>

parent_pid: Option<Principal>

Trait Implementations

impl CandidType for EnvData

fn _ty() -> Type

fn id() -> TypeId

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

where __S: Serializer,

fn ty() -> Type

impl Clone for EnvData

fn clone(&self) -> EnvData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EnvData

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

Formats the value using the given formatter.

impl Default for EnvData

fn default() -> EnvData

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for EnvData

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for EnvData

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Storable for EnvData

const BOUND: Bound

The size bounds of the type.

fn to_bytes(&self) -> Cow<'_, [u8]>

Converts the element into a possibly borrowed byte slice.

fn into_bytes(self) -> Vec<u8>

Converts the element into an owned byte vector.

fn from_bytes(bytes: Cow<'_, [u8]>) -> Self

Converts bytes into an element.

fn to_bytes_checked(&self) -> Cow<'_, [u8]>

Like to_bytes, but checks that bytes conform to declared bounds.

fn into_bytes_checked(self) -> Vec<u8>

where Self: Sized,

Like into_bytes, but checks that bytes conform to declared bounds.

fn check_bounds(bytes: &[u8])

Validates that a byte slice fits within this type’s declared bounds.