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XCMSender

pallet_staking_async_rc_client

Struct XCMSender 

Source 
pub struct XCMSender<Sender, Destination, Message, ToXcm>(/* private fields */);
Expand description

Common utility to send XCM messages that can use SplittableMessage.

It can be used both in the RC and AH. Message is the splittable message type, and ToXcm should be configured by the user, converting message to a valida Xcm<()>. It should utilize the correct call indices, which we only know at the runtime level.

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impl<Sender, Destination, Message, ToXcm> XCMSender<Sender, Destination, Message, ToXcm>
where Sender: SendXcm, Destination: Get<Location>, Message: Clone + Encode, ToXcm: Convert<Message, Xcm<()>>,

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pub fn send(message: Message) -> Result<(), ()>

Send the message single-shot; no splitting.

Useful for sending messages that are already paged/chunked, so we are sure that they fit in one message.

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pub fn send_with_fees<XcmExec, Call, AccountId, AccountToLoc, Balance>( message: Message, payer: AccountId, max_delivery_and_remote_execution_fee: Option<Balance>, execution_cost: Balance, ) -> Result<Balance, SendKeysError<Balance>>
where XcmExec: ExecuteXcm<Call>, AccountToLoc: Convert<AccountId, Location>, Balance: TryFrom<u128> + Into<u128> + PartialOrd + Copy + Default + Add<Output = Balance>,

Send the message with fee charging and optional max fee limit.

This method validates the XCM message first, calculates the total fee (delivery + execution), optionally checks if the total exceeds the specified maximum, charges the total from the payer, and then delivers the message.

The relay chain uses UnpaidExecution, so no fees are charged there. Instead, the total cost (delivery + remote execution) is charged upfront on AssetHub.

  • message: The message to send
  • payer: The account paying fees
  • max_delivery_and_remote_execution_fee: Optional maximum total fee the user is willing to pay
  • execution_cost: The relay chain execution cost to include in the total

Generic parameters:

  • XcmExec: The XCM executor that implements charge_fees
  • Call: The runtime call type (used by XcmExec)
  • AccountId: The account identifier type
  • AccountToLoc: Converter from AccountId to XCM Location
  • Balance: The balance type for fee limits

Returns the total fees charged on success (delivery + execution).

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impl<Sender, Destination, Message, ToXcm> XCMSender<Sender, Destination, Message, ToXcm>
where Sender: SendXcm, Destination: Get<Location>, Message: SplittableMessage + Display + Clone + Encode, ToXcm: Convert<Message, Xcm<()>>,

Source

pub fn split_then_send( message: Message, maybe_max_steps: Option<u32>, ) -> Result<(), ()>

👎Deprecated: all staking related VMP messages should fit the single message limits. Should not be used.

Safe send method to send a message, while validating it and using SplittableMessage to split it into smaller pieces if XCM validation fails with ExceedsMaxMessageSize. It will fail on other errors.

Returns Ok() if the message was sent using XCM, potentially with splitting up to maybe_max_step times, Err(()) otherwise.

Auto Trait Implementations§

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impl<Sender, Destination, Message, ToXcm> Freeze for XCMSender<Sender, Destination, Message, ToXcm>

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impl<Sender, Destination, Message, ToXcm> RefUnwindSafe for XCMSender<Sender, Destination, Message, ToXcm>
where Sender: RefUnwindSafe, Destination: RefUnwindSafe, Message: RefUnwindSafe, ToXcm: RefUnwindSafe,

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impl<Sender, Destination, Message, ToXcm> Send for XCMSender<Sender, Destination, Message, ToXcm>
where Sender: Send, Destination: Send, Message: Send, ToXcm: Send,

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impl<Sender, Destination, Message, ToXcm> Sync for XCMSender<Sender, Destination, Message, ToXcm>
where Sender: Sync, Destination: Sync, Message: Sync, ToXcm: Sync,

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impl<Sender, Destination, Message, ToXcm> Unpin for XCMSender<Sender, Destination, Message, ToXcm>
where Sender: Unpin, Destination: Unpin, Message: Unpin, ToXcm: Unpin,

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impl<Sender, Destination, Message, ToXcm> UnwindSafe for XCMSender<Sender, Destination, Message, ToXcm>
where Sender: UnwindSafe, Destination: UnwindSafe, Message: UnwindSafe, ToXcm: UnwindSafe,

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