Trait DecodeCandid 

pub trait DecodeCandid {
    // Required method
    fn decode_candid<T>(self) -> Result<T, String>
       where T: CandidType + for<'de> Deserialize<'de>;
}

Extension trait for decoding Candid responses from inter-canister calls.

This trait provides a convenient method to decode the response of an inter-canister call into a Rust type, combining error handling for both call failures and decoding failures.

Required Methods

fn decode_candid<T>(self) -> Result<T, String>

where T: CandidType + for<'de> Deserialize<'de>,

Decodes the response as a Candid type.

This method handles both the call result and Candid decoding in a single step, converting any errors into descriptive string messages.

Type Parameters

• T - The type to decode the response into. Must implement CandidType and Deserialize.

Returns

• Ok(T) - The successfully decoded response.
• Err(String) - An error message describing either the call failure or decoding failure.

Examples

let result: u32 = Call::bounded_wait(canister_id, "get_value")
    .await
    .decode_candid()?;

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl DecodeCandid for Result<Response, CallFailed>

fn decode_candid<T>(self) -> Result<T, String>

where T: CandidType + for<'de> Deserialize<'de>,

Implementors