Module frame_support::traits
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Traits for FRAME.
NOTE: If you’re looking for parameter_types, it has moved in to the top-level module.
Modules
Structs
The function and pallet name of the Call.
Guard type for clearing all pushed constraints from a FilterStack and reinstating them when
dropped.
Guard type for pushing a constraint to a FilterStack and popping when dropped.
Implement Get by returning Default for any type that implements Default.
The version of a pallet.
A naive implementation of CurrencyConvert that simply saturates all conversions.
Split an unbalanced amount two ways between a common divisor.
A shim for placing around a storage item in order to use it as a StoredValue. Ideally this
wouldn’t be needed as StorageValues should blanket implement StoredValues, however this
would break the ability to have custom impls of StoredValue. The other workaround is to
implement it directly in the macro.
Provides an implementation of Randomness that should only be used in tests!
An implementation of CurrencyToVote tailored for chain’s that have a balance type of u128.
Reasons for moving funds out of an account.
Enums
Status of funds.
Simple boolean for whether an account needs to be kept in existence.
Either a positive or a negative imbalance.
Constants
The storage key postfix that is used to store the PalletVersion per pallet.
Traits
Trait for type that can handle incremental changes to a set of account IDs.
A trait for querying whether a type can be said to “contain” a value.
A trait for querying bound for the length of an implementation of Contains
Abstraction over a fungible assets system.
A trait similar to Convert to convert values from B an abstract balance type
into u64 and back from u128. (This conversion is used in election and other places where complex
calculation over balance type is needed)
Some sort of check on the origin is performed by this object.
Something that can estimate at which block the next new_session will be triggered. This must
always be implemented by the session module.
Something that can estimate at which block the next session rotation will happen. This should
be the same logical unit that dictates ShouldEndSession to the session module. No Assumptions
are made about the scheduling of the sessions.
Simple trait for providing a filter over a reference to some type.
Trait to add a constraint onto the filter.
A trait for finding the author of a block header based on the PreRuntime digests contained
within it.
A trait to define the build function of a genesis config, T and I are placeholder for pallet trait and pallet instance.
A trait for querying a single value from a type.
Gets the metadata for the Call - function name and pallet name.
Gets the function name of the Call.
Provides version information about a pallet.
A simple, generic one-parameter event notifier/handler.
The pallet hooks trait. Implementing this lets you express some logic to execute.
A trait for a not-quite Linear Type that tracks an imbalance.
Trait for type that can handle the initialization of account IDs at genesis.
An instance of a pallet in the storage.
Simple trait for providing a filter over a reference to some type, given an instance of itself.
Type that provide some integrity tests.
Something that can be checked to be a of sub type T.
Trait to be used when types are exactly same.
Something which can compute and check proofs of a historical key owner and return full identification data of that key owner.
Trait to be used by block producing consensus engine modules to determine how late the current block is (e.g. in a slot-based proposal mechanism how many slots were skipped since the previous block).
Anything that can have a ::len() method.
A currency whose accounts can have liquidity restrictions.
Off-chain computation trait.
The block finalization trait.
A trait that will be called at genesis.
The block initialization trait.
The account with the given id was reaped.
Handler for when a new account has been created.
The runtime upgrade trait.
Handler for when some currency “account” decreased in balance for some reason.
A session handler for specific key type.
Methods available on frame_system::Config::Origin.
Provides information about the pallet setup in the runtime.
A currency where funds can be reserved from the user.
An instance of a storage in a pallet.
An abstraction of a value stored within storage, but possibly as part of a larger composite item.
A type for which some values make sense to be able to drop without further consideration.
Type that can be dispatched with an origin but without checking the origin filter.
Trait to deal with unix time.
Implementors of this trait provide information about whether or not some validator has been registered with them. The Session module is an implementor.
A trait for online node inspection in a session.
ValidatorSet combined with an identification.
A trait for verifying the seal of a header and returning the author.
A vesting schedule over a currency. This allows a particular currency to have vesting limits applied to it.
Type Definitions
An identifier for a lock. Used for disambiguating different locks so that they can be individually replaced or removed.