Crate frame_support

Support code for the runtime.

Re-exports

pub use serde;
pub use self::storage::StorageValue;
pub use self::storage::StorageMap;
pub use self::storage::StorageDoubleMap;
pub use self::storage::StoragePrefixedMap;
pub use self::storage::IterableStorageMap;
pub use self::storage::IterableStorageDoubleMap;
pub use self::storage::migration;
pub use self::dispatch::Parameter;
pub use self::dispatch::Callable;
pub use sp_runtime;

Modules

debug	Runtime debugging and logging utilities.
dispatch	Dispatch system. Contains a macro for defining runtime modules and generating values representing lazy module function calls.
error	Macro for declaring a module error.
event	Macros that define an Event types. Events can be used to easily report changes or conditions in your runtime to external entities like users, chain explorers, or dApps.
genesis_config	Macros for generating the runtime genesis config.
inherent
instances	Some instance placeholder to be used in frame_support::pallet attribute macro.
metadata
pallet_prelude	Prelude to be used alongside pallet macro, for ease of use.
storage	Stuff to do with the runtime’s storage.
traits	Traits for FRAME.
unsigned
weights	Primitives for transaction weighting.

Macros

__impl_outer_config_types	Helper macro for impl_outer_config
assert_err	Assert an expression returns an error specified.
assert_err_ignore_postinfo	Assert an expression returns an error specified.
assert_err_with_weight	Assert an expression returns error with the given weight.
assert_noop	Evaluate an expression, assert it returns an expected Err value and that runtime storage has not been mutated (i.e. expression is a no-operation).
assert_ok	Panic if an expression doesn’t evaluate to Ok.
assert_storage_noop	Evaluate any expression and assert that runtime storage has not been mutated (i.e. expression is a storage no-operation).
construct_runtime	Construct a runtime, with the given name and the given modules.
crate_to_pallet_version	Convert the current crate version into a PalletVersion.
decl_error	Declare an error type for a runtime module.
decl_event	Implement the Event for a module.
decl_module	Declares a Module struct and a Call enum, which implements the dispatch logic.
decl_storage	Declares strongly-typed wrappers around codec-compatible types in storage.
ensure	Evaluate $x:expr and if not true return Err($y:expr).
fail	Return Err of the expression: return Err($expression);.
impl_filter_stack
impl_outer_config	Implement the runtime genesis configuration.
impl_outer_dispatch	Implement a meta-dispatch module to dispatch to other dispatchers.
impl_outer_event	Constructs an Event type for a runtime. This is usually called automatically by the construct_runtime macro.
impl_outer_inherent	Implement the outer inherent. All given modules need to implement ProvideInherent.
impl_outer_origin	Constructs an Origin type for a runtime. This is usually called automatically by the construct_runtime macro. See also __create_decl_macro.
impl_outer_validate_unsigned	Implement ValidateUnsigned for Runtime. All given modules need to implement ValidateUnsigned.
impl_runtime_metadata	Implements the metadata support for the given runtime and all its modules.
ord_parameter_types	Macro for easily creating a new implementation of both the Get and Contains traits. Use exactly as with parameter_types, only the type must be Ord.
parameter_types	Create new implementations of the Get trait.
parameter_types_impl_thread_local
runtime_print	Print out a formatted message.

Structs

Blake2_128	Hash storage keys with blake2 128
Blake2_128Concat	Hash storage keys with concat(blake2_128(key), key)
Blake2_256	Hash storage keys with blake2 256
Identity	Store the key directly.
Twox64Concat	Hash storage keys with concat(twox64(key), key)
Twox128	Hash storage keys with twox 128
Twox256	Hash storage keys with twox 256

Enums

Never	A type that cannot be instantiated.
Void	The void type - it cannot exist.

Traits

Hashable
Printable	Trait for things which can be printed from the runtime.
ReversibleStorageHasher	Hasher to use to hash keys to insert to storage.
StorageHasher	Hasher to use to hash keys to insert to storage.

Functions

print

Print something that implements Printable from the runtime.

Type Definitions

ConsensusEngineId

Consensus engine unique ID.

Attribute Macros

pallet	pallet attribute macro allows to define a pallet to be used in construct_runtime!.
require_transactional	Assert the annotated function is executed within a storage transaction.
transactional	Execute the annotated function in a new storage transaction.

Derive Macros

CloneNoBound	Derive Clone but do not bound any generic.
DebugNoBound	Derive Debug but do not bound any generic.
EqNoBound	Derive Eq but do not bound any generic.
PartialEqNoBound	Derive PartialEq but do not bound any generic.
RuntimeDebugNoBound	Derive Debug, if std is enabled it uses frame_support::DebugNoBound, if std is not enabled it just returns "<stripped>". This behaviour is useful to prevent bloating the runtime WASM blob from unneeded code.