Module sp_runtime::traits

Primitives for the runtime modules.

Structs

ApiRef	Auxiliary wrapper that holds an api instance and binds it to the given lifetime.
AppendZerosInput	Input that adds infinite number of zero after wrapped input.
BadOrigin	An error type that indicates that the origin is invalid.
BlakeTwo256	Blake2-256 Hash implementation.
ConvertInto	A structure that performs standard conversion using the standard Rust conversion traits.
Identity	A structure that performs identity conversion.
IdentityLookup	A lookup implementation returning the input value.
LookupError	An error that indicates that a lookup failed.
TrailingZeroInput	Input that adds infinite number of zero after wrapped input.

Traits

AccountIdConversion	This type can be converted into and possibly from an AccountId (which itself is generic).
AppVerify	Means of signature verification of an application key.
Applyable	An "executable" piece of information, used by the standard Substrate Executive in order to enact a piece of extrinsic information by marshalling and dispatching to a named function call.
BlindCheckable	A "checkable" piece of information, used by the standard Substrate Executive in order to check the validity of a piece of extrinsic information, usually by verifying the signature. Implement for pieces of information that don't require additional context in order to be checked.
Block	Something which fulfills the abstract idea of a Substrate block. It has types for Extrinsic pieces of information as well as a Header.
BlockIdTo	Something that can convert a [BlockId] to a number or a hash.
Bounded	Numbers which have upper and lower bounds
CheckEqual	Something that can be checked for equality and printed out to a debug channel if bad.
Checkable	A "checkable" piece of information, used by the standard Substrate Executive in order to check the validity of a piece of extrinsic information, usually by verifying the signature. Implement for pieces of information that require some additional context Context in order to be checked.
CheckedAdd	Performs addition that returns None instead of wrapping around on overflow.
CheckedConversion	Convenience type to work around the highly unergonomic syntax needed to invoke the functions of overloaded generic traits, in this case TryFrom and TryInto.
CheckedDiv	Performs division that returns None instead of panicking on division by zero and instead of wrapping around on underflow and overflow.
CheckedMul	Performs multiplication that returns None instead of wrapping around on underflow or overflow.
CheckedShl	Performs a left shift that returns None on shifts larger than the type width.
CheckedShr	Performs a right shift that returns None on shifts larger than the type width.
CheckedSub	Performs subtraction that returns None instead of wrapping around on underflow.
Clear	Trait for things that can be clear (have no bits set). For numeric types, essentially the same as Zero.
Convert	Extensible conversion trait. Generic over both source and destination types.
Dispatchable	A lazy call (module function and argument values) that can be executed via its dispatch method.
EnsureOrigin	Some sort of check on the origin is performed by this object.
Extrinsic	Something that acts like an Extrinsic.
GetNodeBlockType	A marker trait for something that knows the type of the node block.
GetRuntimeBlockType	A marker trait for something that knows the type of the runtime block.
Hash	Abstraction around hashing
Header	Something which fulfills the abstract idea of a Substrate header. It has types for a Number, a Hash and a Hashing. It provides access to an extrinsics_root, state_root and parent_hash, as well as a digest and a block number.
IdentifyAccount	Some type that is able to be collapsed into an account ID. It is not possible to recreate the original value from the account ID.
IntegerSquareRoot	A trait implementing integer square root.
IsMember	Determine if a MemberId is a valid member.
Lazy	A lazy value.
Lookup	Means of changing one type into another in a manner dependent on the source type.
MaybeDisplay	A type that implements Display when in std environment.
MaybeHash	A type that implements Hash when in std environment.
MaybeSerialize	A type that implements Serialize when in std environment.
MaybeSerializeDeserialize	A type that implements Serialize, DeserializeOwned and Debug when in std environment.
Member	A type that can be used in runtime structures.
OffchainWorker	Off-chain computation trait.
OnFinalize	The block finalization trait. Implementing this lets you express what should happen for your module when the block is ending.
OnInitialize	The block initialization trait. Implementing this lets you express what should happen for your module when the block is beginning (right before the first extrinsic is executed).
One	Defines a multiplicative identity element for Self.
OpaqueKeys	Opaque datatype that may be destructured into a series of raw byte slices (which represent individual keys).
Printable	Trait for things which can be printed from the runtime.
ProvideRuntimeApi	Something that provides a runtime api.
RandomnessBeacon	A type that provides a randomness beacon.
RuntimeApiInfo	Something that provides information about a runtime api.
SaturatedConversion	Convenience type to work around the highly unergonomic syntax needed to invoke the functions of overloaded generic traits, in this case SaturatedFrom and SaturatedInto.
Saturating	Simple trait to use checked mul and max value to give a saturated mul operation over supported types.
Scale	Multiply and divide by a number that isn't necessarily the same type. Basically just the same as Mul and Div except it can be used for all basic numeric types.
SignedExtension	Means by which a transaction may be extended. This type embodies both the data and the logic that should be additionally associated with the transaction. It should be plain old data.
SimpleArithmetic	A meta trait for arithmetic.
SimpleBitOps	A meta trait for all bit ops.
StaticLookup	Means of changing one type into another in a manner dependent on the source type. This variant is different to Lookup in that it doesn't (can cannot) require any context.
UniqueSaturatedFrom	Just like From except that if the source value is too big to fit into the destination type then it'll saturate the destination.
UniqueSaturatedInto	Just like Into except that if the source value is too big to fit into the destination type then it'll saturate the destination.
ValidateUnsigned	Deprecated Something that can validate unsigned extrinsics for the transaction pool.
Verify	Means of signature verification.
Zero	Defines an additive identity element for Self.

Type Definitions

DigestFor	Extract the digest type for a block.
DigestItemFor	Extract the digest item type for a block.
HashFor	Extract the hashing type for a block.
NumberFor	Extract the number type for a block.