Enum staging_xcm::v2::Instruction
source · pub enum Instruction<RuntimeCall> {
Show 28 variants
WithdrawAsset(MultiAssets),
ReserveAssetDeposited(MultiAssets),
ReceiveTeleportedAsset(MultiAssets),
QueryResponse {
query_id: QueryId,
response: Response,
max_weight: u64,
},
TransferAsset {
assets: MultiAssets,
beneficiary: MultiLocation,
},
TransferReserveAsset {
assets: MultiAssets,
dest: MultiLocation,
xcm: Xcm<()>,
},
Transact {
origin_type: OriginKind,
require_weight_at_most: u64,
call: DoubleEncoded<RuntimeCall>,
},
HrmpNewChannelOpenRequest {
sender: u32,
max_message_size: u32,
max_capacity: u32,
},
HrmpChannelAccepted {
recipient: u32,
},
HrmpChannelClosing {
initiator: u32,
sender: u32,
recipient: u32,
},
ClearOrigin,
DescendOrigin(InteriorMultiLocation),
ReportError {
query_id: QueryId,
dest: MultiLocation,
max_response_weight: u64,
},
DepositAsset {
assets: MultiAssetFilter,
max_assets: u32,
beneficiary: MultiLocation,
},
DepositReserveAsset {
assets: MultiAssetFilter,
max_assets: u32,
dest: MultiLocation,
xcm: Xcm<()>,
},
ExchangeAsset {
give: MultiAssetFilter,
receive: MultiAssets,
},
InitiateReserveWithdraw {
assets: MultiAssetFilter,
reserve: MultiLocation,
xcm: Xcm<()>,
},
InitiateTeleport {
assets: MultiAssetFilter,
dest: MultiLocation,
xcm: Xcm<()>,
},
QueryHolding {
query_id: QueryId,
dest: MultiLocation,
assets: MultiAssetFilter,
max_response_weight: u64,
},
BuyExecution {
fees: MultiAsset,
weight_limit: WeightLimit,
},
RefundSurplus,
SetErrorHandler(Xcm<RuntimeCall>),
SetAppendix(Xcm<RuntimeCall>),
ClearError,
ClaimAsset {
assets: MultiAssets,
ticket: MultiLocation,
},
Trap(u64),
SubscribeVersion {
query_id: QueryId,
max_response_weight: u64,
},
UnsubscribeVersion,
}Expand description
Cross-Consensus Message: A message from one consensus system to another.
Consensus systems that may send and receive messages include blockchains and smart contracts.
All messages are delivered from a known origin, expressed as a MultiLocation.
This is the inner XCM format and is version-sensitive. Messages are typically passed using the
outer XCM format, known as VersionedXcm.
Variants§
WithdrawAsset(MultiAssets)
Withdraw asset(s) (assets) from the ownership of origin and place them into the Holding
Register.
assets: The asset(s) to be withdrawn into holding.
Kind: Command.
Errors:
ReserveAssetDeposited(MultiAssets)
Asset(s) (assets) have been received into the ownership of this system on the origin
system and equivalent derivatives should be placed into the Holding Register.
assets: The asset(s) that are minted into holding.
Safety: origin must be trusted to have received and be storing assets such that they
may later be withdrawn should this system send a corresponding message.
Kind: Trusted Indication.
Errors:
ReceiveTeleportedAsset(MultiAssets)
Asset(s) (assets) have been destroyed on the origin system and equivalent assets should
be created and placed into the Holding Register.
assets: The asset(s) that are minted into the Holding Register.
Safety: origin must be trusted to have irrevocably destroyed the corresponding assets
prior as a consequence of sending this message.
Kind: Trusted Indication.
Errors:
QueryResponse
Fields
query_id: QueryIdRespond with information that the local system is expecting.
query_id: The identifier of the query that resulted in this message being sent.response: The message content.max_weight: The maximum weight that handling this response should take.
Safety: No concerns.
Kind: Information.
Errors:
TransferAsset
Fields
assets: MultiAssetsbeneficiary: MultiLocationWithdraw asset(s) (assets) from the ownership of origin and place equivalent assets
under the ownership of beneficiary.
assets: The asset(s) to be withdrawn.beneficiary: The new owner for the assets.
Safety: No concerns.
Kind: Command.
Errors:
TransferReserveAsset
Fields
assets: MultiAssetsdest: MultiLocationWithdraw asset(s) (assets) from the ownership of origin and place equivalent assets
under the ownership of dest within this consensus system (i.e. its sovereign account).
Send an onward XCM message to dest of ReserveAssetDeposited with the given
xcm.
assets: The asset(s) to be withdrawn.dest: The location whose sovereign account will own the assets and thus the effective beneficiary for the assets and the notification target for the reserve asset deposit message.xcm: The instructions that should follow theReserveAssetDepositedinstruction, which is sent onwards todest.
Safety: No concerns.
Kind: Command.
Errors:
Transact
Fields
origin_type: OriginKindrequire_weight_at_most: u64call: DoubleEncoded<RuntimeCall>Apply the encoded transaction call, whose dispatch-origin should be origin as expressed
by the kind of origin origin_type.
origin_type: The means of expressing the message origin as a dispatch origin.max_weight: The weight ofcall; this should be at least the chain’s calculated weight and will be used in the weight determination arithmetic.call: The encoded transaction to be applied.
Safety: No concerns.
Kind: Command.
Errors:
HrmpNewChannelOpenRequest
Fields
sender: u32A message to notify about a new incoming HRMP channel. This message is meant to be sent by the relay-chain to a para.
sender: The sender in the to-be opened channel. Also, the initiator of the channel opening.max_message_size: The maximum size of a message proposed by the sender.max_capacity: The maximum number of messages that can be queued in the channel.
Safety: The message should originate directly from the relay-chain.
Kind: System Notification
HrmpChannelAccepted
Fields
A message to notify about that a previously sent open channel request has been accepted by the recipient. That means that the channel will be opened during the next relay-chain session change. This message is meant to be sent by the relay-chain to a para.
Safety: The message should originate directly from the relay-chain.
Kind: System Notification
Errors:
HrmpChannelClosing
Fields
initiator: u32A message to notify that the other party in an open channel decided to close it. In
particular, initiator is going to close the channel opened from sender to the
recipient. The close will be enacted at the next relay-chain session change. This message
is meant to be sent by the relay-chain to a para.
Safety: The message should originate directly from the relay-chain.
Kind: System Notification
Errors:
ClearOrigin
Clear the origin.
This may be used by the XCM author to ensure that later instructions cannot command the
authority of the origin (e.g. if they are being relayed from an untrusted source, as often
the case with ReserveAssetDeposited).
Safety: No concerns.
Kind: Command.
Errors:
DescendOrigin(InteriorMultiLocation)
Mutate the origin to some interior location.
Kind: Command
Errors:
ReportError
Fields
query_id: QueryIddest: MultiLocationImmediately report the contents of the Error Register to the given destination via XCM.
A QueryResponse message of type ExecutionOutcome is sent to dest with the given
query_id and the outcome of the XCM.
query_id: An identifier that will be replicated into the returned XCM message.dest: A valid destination for the returned XCM message.max_response_weight: The maximum amount of weight that theQueryResponseitem which is sent as a reply may take to execute. NOTE: If this is unexpectedly large then the response may not execute at all.
Kind: Command
Errors:
DepositAsset
Fields
assets: MultiAssetFiltermax_assets: u32beneficiary: MultiLocationRemove the asset(s) (assets) from the Holding Register and place equivalent assets under
the ownership of beneficiary within this consensus system.
assets: The asset(s) to remove from holding.max_assets: The maximum number of unique assets/asset instances to remove from holding. Only the firstmax_assetsassets/instances of those matched byassetswill be removed, prioritized under standard asset ordering. Any others will remain in holding.beneficiary: The new owner for the assets.
Kind: Command
Errors:
DepositReserveAsset
Fields
assets: MultiAssetFiltermax_assets: u32dest: MultiLocationRemove the asset(s) (assets) from the Holding Register and place equivalent assets under
the ownership of dest within this consensus system (i.e. deposit them into its sovereign
account).
Send an onward XCM message to dest of ReserveAssetDeposited with the given effects.
assets: The asset(s) to remove from holding.max_assets: The maximum number of unique assets/asset instances to remove from holding. Only the firstmax_assetsassets/instances of those matched byassetswill be removed, prioritized under standard asset ordering. Any others will remain in holding.dest: The location whose sovereign account will own the assets and thus the effective beneficiary for the assets and the notification target for the reserve asset deposit message.xcm: The orders that should follow theReserveAssetDepositedinstruction which is sent onwards todest.
Kind: Command
Errors:
ExchangeAsset
Fields
give: MultiAssetFilterreceive: MultiAssetsRemove the asset(s) (give) from the Holding Register and replace them with alternative
assets.
The minimum amount of assets to be received into the Holding Register for the order not to fail may be stated.
give: The asset(s) to remove from holding.receive: The minimum amount of assets(s) whichgiveshould be exchanged for.
Kind: Command
Errors:
InitiateReserveWithdraw
Fields
assets: MultiAssetFilterreserve: MultiLocationRemove the asset(s) (assets) from holding and send a WithdrawAsset XCM message to a
reserve location.
assets: The asset(s) to remove from holding.reserve: A valid location that acts as a reserve for all asset(s) inassets. The sovereign account of this consensus system on the reserve location will have appropriate assets withdrawn andeffectswill be executed on them. There will typically be only one valid location on any given asset/chain combination.xcm: The instructions to execute on the assets once withdrawn on the reserve location.
Kind: Command
Errors:
InitiateTeleport
Fields
assets: MultiAssetFilterdest: MultiLocationRemove the asset(s) (assets) from holding and send a ReceiveTeleportedAsset XCM message
to a dest location.
assets: The asset(s) to remove from holding.dest: A valid location that respects teleports coming from this location.xcm: The instructions to execute on the assets once arrived on the destination location.
NOTE: The dest location MUST respect this origin as a valid teleportation origin for
all assets. If it does not, then the assets may be lost.
Kind: Command
Errors:
QueryHolding
Fields
query_id: QueryIddest: MultiLocationassets: MultiAssetFilterSend a Balances XCM message with the assets value equal to the holding contents, or a
portion thereof.
query_id: An identifier that will be replicated into the returned XCM message.dest: A valid destination for the returned XCM message. This may be limited to the current origin.assets: A filter for the assets that should be reported back. The assets reported back will be, asset-wise, the lesser of this value and the holding register. No wildcards will be used when reporting assets back.max_response_weight: The maximum amount of weight that theQueryResponseitem which is sent as a reply may take to execute. NOTE: If this is unexpectedly large then the response may not execute at all.
Kind: Command
Errors:
BuyExecution
Fields
fees: MultiAssetweight_limit: WeightLimitPay for the execution of some XCM xcm and orders with up to weight
picoseconds of execution time, paying for this with up to fees from the Holding Register.
fees: The asset(s) to remove from the Holding Register to pay for fees.weight_limit: The maximum amount of weight to purchase; this must be at least the expected maximum weight of the total XCM to be executed for theAllowTopLevelPaidExecutionFrombarrier to allow the XCM be executed.
Kind: Command
Errors:
RefundSurplus
Refund any surplus weight previously bought with BuyExecution.
Kind: Command
Errors: None.
SetErrorHandler(Xcm<RuntimeCall>)
Set the Error Handler Register. This is code that should be called in the case of an error happening.
An error occurring within execution of this code will NOT result in the error register being set, nor will an error handler be called due to it. The error handler and appendix may each still be set.
The apparent weight of this instruction is inclusive of the inner Xcm; the executing
weight however includes only the difference between the previous handler and the new
handler, which can reasonably be negative, which would result in a surplus.
Kind: Command
Errors: None.
SetAppendix(Xcm<RuntimeCall>)
Set the Appendix Register. This is code that should be called after code execution (including the error handler if any) is finished. This will be called regardless of whether an error occurred.
Any error occurring due to execution of this code will result in the error register being set, and the error handler (if set) firing.
The apparent weight of this instruction is inclusive of the inner Xcm; the executing
weight however includes only the difference between the previous appendix and the new
appendix, which can reasonably be negative, which would result in a surplus.
Kind: Command
Errors: None.
ClearError
Clear the Error Register.
Kind: Command
Errors: None.
ClaimAsset
Fields
assets: MultiAssetsticket: MultiLocationCreate some assets which are being held on behalf of the origin.
assets: The assets which are to be claimed. This must match exactly with the assets claimable by the origin of the ticket.ticket: The ticket of the asset; this is an abstract identifier to help locate the asset.
Kind: Command
Errors:
Trap(u64)
Always throws an error of type Trap.
Kind: Command
Errors:
Trap: All circumstances, whose inner value is the same as this item’s inner value.
SubscribeVersion
Fields
Ask the destination system to respond with the most recent version of XCM that they
support in a QueryResponse instruction. Any changes to this should also elicit similar
responses when they happen.
query_id: An identifier that will be replicated into the returned XCM message.max_response_weight: The maximum amount of weight that theQueryResponseitem which is sent as a reply may take to execute. NOTE: If this is unexpectedly large then the response may not execute at all.
Kind: Command
Errors: Fallible
UnsubscribeVersion
Cancel the effect of a previous SubscribeVersion instruction.
Kind: Command
Errors: Fallible
Implementations§
source§impl<RuntimeCall> Instruction<RuntimeCall>
impl<RuntimeCall> Instruction<RuntimeCall>
pub fn into<C>(self) -> Instruction<C>
pub fn from<C>(xcm: Instruction<C>) -> Self
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