Module sp_runtime::traits

Primitives for the runtime modules.

Structs

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.
Keccak256	Keccak-256 Hash implementation.
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.
AtLeast32Bit	A meta trait for arithmetic.
AtLeast32BitUnsigned	A meta trait for arithmetic. Same as AtLeast32Bit, but also bounded to be unsigned.
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.
Extrinsic	Something that acts like an Extrinsic.
ExtrinsicMetadata	Implementor is an Extrinsic and provides metadata about this 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.
MaybeFromStr	A type that implements FromStr when in std environment.
MaybeHash	A type that implements Hash when in std environment.
MaybeMallocSizeOf	A type that implements MallocSizeOf.
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.
One	Defines a multiplicative identity element for Self.
OpaqueKeys	Opaque data type 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.
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	Saturating arithmetic operations, returning maximum or minimum values instead of overflowing.
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.
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	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.
DispatchInfoOf	Shortcut to reference the Info type of a Dispatchable.
HashFor	Extract the hashing type for a block.
NumberFor	Extract the number type for a block.
PostDispatchInfoOf	Shortcut to reference the PostInfo type of a Dispatchable.