Crate xcm_builder

XCM-Builder

Types and helpers for building XCM configuration.

Modules

test_utils

Structs

Account32Hash

AccountId32Aliases

Extracts the AccountId32 from the passed location if the network matches.

AccountKey20Aliases

AllowKnownQueryResponses

Allows only messages if the generic ResponseHandler expects them via expecting_response.

AllowSubscriptionsFrom

Allows execution from origin if it is just a straight SubscribeVerison or UnsubscribeVersion instruction.

AllowTopLevelPaidExecutionFrom

Allows execution from origin if it is contained in T (i.e. T::Contains(origin)) taking payments into account.

AllowUnpaidExecutionFrom

Allows execution from any origin that is contained in T (i.e. T::Contains(origin)) without any payments. Use only for executions from trusted origin groups.

AsPrefixedGeneralIndex

Converter struct implementing AssetIdConversion converting a numeric asset ID (must be TryFrom/TryInto<u128>) into a GeneralIndex junction, prefixed by some MultiLocation value. The MultiLocation value will typically be a PalletInstance junction.

BackingToPlurality

Convert implementation to convert from some an origin which implements Backing into a corresponding Plurality MultiLocation.

Case

Accepts an asset if it is contained in the given T’s Get implementation.

ChildParachainAsNative

ChildParachainConvertsVia

ChildSystemParachainAsSuperuser

ConvertedAbstractAssetId

ConvertedConcreteAssetId

CurrencyAdapter

Simple adapter to use a currency as asset transactor. This type can be used as type AssetTransactor in xcm::Config.

EnsureXcmOrigin

EnsureOrigin barrier to convert from dispatch origin to XCM origin, if one exists.

FixedRateOfConcreteFungibleDeprecated

Simple fee calculator that requires payment in a single concrete fungible at a fixed rate.

FixedRateOfFungible

Simple fee calculator that requires payment in a single fungible at a fixed rate.

FixedWeightBounds

FungiblesAdapter

FungiblesMutateAdapter

FungiblesTransferAdapter

IsAbstract

Same as IsConcrete but for a fungible with abstract location.

IsChildSystemParachain

Allows a message only if it is from a system-level child parachain.

IsConcrete

Converts a MultiAsset into balance B if it is a concrete fungible with an id equal to that given by T’s Get.

LocationInverter

Simple location inverter; give it this location’s ancestry and it’ll figure out the inverted location.

NativeAsset

Accepts an asset iff it is a native asset.

ParentAsSuperuser

ParentIsPreset

A MultiLocation consisting of a single Parent [Junction] will be converted to the parent AccountId.

RelayChainAsNative

SiblingParachainAsNative

SiblingParachainConvertsVia

SiblingSystemParachainAsSuperuser

SignedAccountId32AsNative

SignedAccountKey20AsNative

SignedToAccountId32

Convert implementation to convert from some a Signed (system) Origin into an AccountId32.

SovereignSignedViaLocation

Sovereign accounts use the system’s Signed origin with an account ID derived from the LocationConverter.

TakeWeightCredit

Execution barrier that just takes max_weight from weight_credit.

UsingComponents

Weight trader which uses the TransactionPayment pallet to set the right price for weight and then places any weight bought into the right account.

WeightInfoBounds

Traits

TakeRevenue

Function trait for handling some revenue. Similar to a negative imbalance (credit) handler, but for a MultiAsset. Sensible implementations will deposit the asset in some known treasury or block-author account.