alloy_rpc_client

Struct RpcCall

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pub struct RpcCall<Params, Resp, Output = Resp, Map = fn(Resp) -> Output>
where
    Params: RpcSend,
    Map: FnOnce(Resp) -> Output,
{ /* private fields */ }
Expand description

A prepared, but unsent, RPC call.

This is a future that will send the request when polled. It contains a Request, a BoxTransport, and knowledge of its expected response type. Upon awaiting, it will send the request and wait for the response. It will then deserialize the response into the expected type.

Errors are captured in the RpcResult type. Rpc Calls will result in either a successful response of the Resp type, an error response, or a transport error.

§Note

Serializing the request is done lazily. The request is not serialized until the future is polled. This differs from the behavior of crate::BatchRequest, which serializes greedily. This is because the batch request must immediately erase the Param type to allow batching of requests with different Param types, while the RpcCall may do so lazily.

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impl<Params, Resp, Output, Map> RpcCall<Params, Resp, Output, Map>
where Params: RpcSend, Map: FnOnce(Resp) -> Output,

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pub fn map_resp<NewOutput, NewMap>( self, map: NewMap, ) -> RpcCall<Params, Resp, NewOutput, NewMap> ⓘ
where NewMap: FnOnce(Resp) -> NewOutput,

Map the response to a different type. This is usable for converting the response to a more usable type, e.g. changing U64 to u64.

§Note

Carefully review the rust documentation on fn pointers before passing them to this function. Unless the pointer is specifically coerced to a fn(_) -> _, the NewMap will be inferred as that function’s unique type. This can lead to confusing error messages.

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pub fn is_subscription(&self) -> bool

Returns true if the request is a subscription.

§Panics

Panics if called after the request has been sent.

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pub fn set_is_subscription(&mut self)

Set the request to be a non-standard subscription (i.e. not “eth_subscribe”).

§Panics

Panics if called after the request has been sent.

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pub fn set_subscription_status(&mut self, status: bool)

Set the subscription status of the request.

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pub fn params(&mut self) -> &mut Params

Get a mutable reference to the params of the request.

This is useful for modifying the params after the request has been prepared.

§Panics

Panics if called after the request has been sent.

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pub fn request(&self) -> &Request<Params>

Returns a reference to the request.

§Panics

Panics if called after the request has been sent.

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pub fn method(&self) -> &str

Returns the RPC method

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pub fn request_mut(&mut self) -> &mut Request<Params>

Returns a mutable reference to the request.

§Panics

Panics if called after the request has been sent.

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pub fn map_params<NewParams: RpcSend>( self, map: impl Fn(Params) -> NewParams, ) -> RpcCall<NewParams, Resp, Output, Map> ⓘ

Map the params of the request into a new type.

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pub fn map_meta(self, f: impl FnOnce(RequestMeta) -> RequestMeta) -> Self

Maps the metadata of the request using the provided function.

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impl<Params, Resp, Output, Map> RpcCall<&Params, Resp, Output, Map>
where Params: RpcSend + ToOwned, Params::Owned: RpcSend, Map: FnOnce(Resp) -> Output,

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pub fn into_owned_params(self) -> RpcCall<Params::Owned, Resp, Output, Map> ⓘ

Convert this call into one with owned params, by cloning the params.

§Panics

Panics if called after the request has been polled.

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impl<'a, Params, Resp, Output, Map> RpcCall<Params, Resp, Output, Map>
where Params: RpcSend + 'a, Resp: RpcRecv, Output: 'static, Map: FnOnce(Resp) -> Output + Send + 'a,

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pub fn boxed(self) -> RpcFut<'a, Output>

Convert this future into a boxed, pinned future, erasing its type.

Trait Implementations§

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impl<Params, Resp: Clone, Output: Clone, Map> Clone for RpcCall<Params, Resp, Output, Map>
where Params: RpcSend + Clone, Map: FnOnce(Resp) -> Output + Clone,

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fn clone(&self) -> RpcCall<Params, Resp, Output, Map> ⓘ

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<Params, Resp, Output, Map> Debug for RpcCall<Params, Resp, Output, Map>
where Params: RpcSend, Map: FnOnce(Resp) -> Output,

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

Formats the value using the given formatter. Read more
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impl<Params, Resp, Output, Map> Future for RpcCall<Params, Resp, Output, Map>
where Params: RpcSend, Resp: RpcRecv, Output: 'static, Map: FnOnce(Resp) -> Output,

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type Output = Result<Output, RpcError<TransportErrorKind>>

The type of value produced on completion.
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fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output>

Attempts to resolve the future to a final value, registering the current task for wakeup if the value is not yet available. Read more
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impl<'pin, Params, Resp, Output, Map> Unpin for RpcCall<Params, Resp, Output, Map>
where Params: RpcSend, Map: FnOnce(Resp) -> Output, PinnedFieldsOf<__RpcCall<'pin, Params, Resp, Output, Map>>: Unpin,

Auto Trait Implementations§

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impl<Params, Resp, Output, Map> Freeze for RpcCall<Params, Resp, Output, Map>
where Map: Freeze, Params: Freeze,

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impl<Params, Resp, Output = Resp, Map = fn(Resp) -> Output> !RefUnwindSafe for RpcCall<Params, Resp, Output, Map>

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impl<Params, Resp, Output, Map> Send for RpcCall<Params, Resp, Output, Map>
where Map: Send,

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impl<Params, Resp, Output = Resp, Map = fn(Resp) -> Output> !Sync for RpcCall<Params, Resp, Output, Map>

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impl<Params, Resp, Output = Resp, Map = fn(Resp) -> Output> !UnwindSafe for RpcCall<Params, Resp, Output, Map>

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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