[−][src]Trait substrate_subxt::SignedExtension

pub trait SignedExtension: Clone + PartialEq<Self> + Eq + Send + Sync + Debug + Codec {
    type AccountId;
    type Call: Dispatchable;
    type AdditionalSigned: Encode;
    type Pre: Default;

    const IDENTIFIER: &'static str;

    fn additional_signed(
        &self
    ) -> Result<Self::AdditionalSigned, TransactionValidityError>;

    fn validate(
        &self, 
        _who: &Self::AccountId, 
        _call: &Self::Call, 
        _info: &<Self::Call as Dispatchable>::Info, 
        _len: usize
    ) -> Result<ValidTransaction, TransactionValidityError> { ... }
    fn pre_dispatch(
        self, 
        who: &Self::AccountId, 
        call: &Self::Call, 
        info: &<Self::Call as Dispatchable>::Info, 
        len: usize
    ) -> Result<Self::Pre, TransactionValidityError> { ... }
    fn validate_unsigned(
        _call: &Self::Call, 
        _info: &<Self::Call as Dispatchable>::Info, 
        _len: usize
    ) -> Result<ValidTransaction, TransactionValidityError> { ... }
    fn pre_dispatch_unsigned(
        call: &Self::Call, 
        info: &<Self::Call as Dispatchable>::Info, 
        len: usize
    ) -> Result<Self::Pre, TransactionValidityError> { ... }
    fn post_dispatch(
        _pre: Self::Pre, 
        _info: &<Self::Call as Dispatchable>::Info, 
        _post_info: &<Self::Call as Dispatchable>::PostInfo, 
        _len: usize, 
        _result: &Result<(), DispatchError>
    ) -> Result<(), TransactionValidityError> { ... }
    fn identifier() -> Vec<&'static str> { ... }
}

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.

Associated Types

`type AccountId`

The type which encodes the sender identity.

`type Call: Dispatchable`

The type which encodes the call to be dispatched.

`type AdditionalSigned: Encode`

Any additional data that will go into the signed payload. This may be created dynamically from the transaction using the additional_signed function.

`type Pre: Default`

The type that encodes information that can be passed from pre_dispatch to post-dispatch.

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Associated Constants

`const IDENTIFIER: &'static str`

Unique identifier of this signed extension.

This will be exposed in the metadata to identify the signed extension used in an extrinsic.

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Required methods

`fn additional_signed( &self ) -> Result<Self::AdditionalSigned, TransactionValidityError>`

Construct any additional data that should be in the signed payload of the transaction. Can also perform any pre-signature-verification checks and return an error if needed.

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Provided methods

`fn validate( &self, _who: &Self::AccountId, _call: &Self::Call, _info: &<Self::Call as Dispatchable>::Info, _len: usize ) -> Result<ValidTransaction, TransactionValidityError>`

Validate a signed transaction for the transaction queue.

This function can be called frequently by the transaction queue, to obtain transaction validity against current state. It should perform all checks that determine a valid transaction, that can pay for its execution and quickly eliminate ones that are stale or incorrect.

Make sure to perform the same checks in pre_dispatch function.

`fn pre_dispatch( self, who: &Self::AccountId, call: &Self::Call, info: &<Self::Call as Dispatchable>::Info, len: usize ) -> Result<Self::Pre, TransactionValidityError>`

Do any pre-flight stuff for a signed transaction.

Note this function by default delegates to validate, so that all checks performed for the transaction queue are also performed during the dispatch phase (applying the extrinsic).

If you ever override this function, you need to make sure to always perform the same validation as in validate.

`fn validate_unsigned( _call: &Self::Call, _info: &<Self::Call as Dispatchable>::Info, _len: usize ) -> Result<ValidTransaction, TransactionValidityError>`

Validate an unsigned transaction for the transaction queue.

This function can be called frequently by the transaction queue to obtain transaction validity against current state. It should perform all checks that determine a valid unsigned transaction, and quickly eliminate ones that are stale or incorrect.

Make sure to perform the same checks in pre_dispatch_unsigned function.

`fn pre_dispatch_unsigned( call: &Self::Call, info: &<Self::Call as Dispatchable>::Info, len: usize ) -> Result<Self::Pre, TransactionValidityError>`

Do any pre-flight stuff for a unsigned transaction.

Note this function by default delegates to validate_unsigned, so that all checks performed for the transaction queue are also performed during the dispatch phase (applying the extrinsic).

If you ever override this function, you need to make sure to always perform the same validation as in validate_unsigned.

`fn post_dispatch( _pre: Self::Pre, _info: &<Self::Call as Dispatchable>::Info, _post_info: &<Self::Call as Dispatchable>::PostInfo, _len: usize, _result: &Result<(), DispatchError> ) -> Result<(), TransactionValidityError>`

Do any post-flight stuff for an extrinsic.

This gets given the DispatchResult _result from the extrinsic and can, if desired, introduce a TransactionValidityError, causing the block to become invalid for including it.

WARNING: It is dangerous to return an error here. To do so will fundamentally invalidate the transaction and any block that it is included in, causing the block author to not be compensated for their work in validating the transaction or producing the block so far.

It can only be used safely when you know that the extrinsic is one that can only be introduced by the current block author; generally this implies that it is an inherent and will come from either an offchain-worker or via InherentData.

`fn identifier() -> Vec<&'static str>`

Returns the list of unique identifier for this signed extension.

As a SignedExtension can be a tuple of SignedExtensions we need to return a Vec that holds all the unique identifiers. Each individual SignedExtension must return exactly one identifier.

This method provides a default implementation that returns vec![SELF::IDENTIFIER].

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[−][src]Trait substrate_subxt::SignedExtension

Associated Types

type AccountId

type Call: Dispatchable

type AdditionalSigned: Encode

type Pre: Default

Associated Constants

const IDENTIFIER: &'static str

Required methods

fn additional_signed( &self) -> Result<Self::AdditionalSigned, TransactionValidityError>

Provided methods

fn validate( &self, _who: &Self::AccountId, _call: &Self::Call, _info: &<Self::Call as Dispatchable>::Info, _len: usize) -> Result<ValidTransaction, TransactionValidityError>

fn pre_dispatch( self, who: &Self::AccountId, call: &Self::Call, info: &<Self::Call as Dispatchable>::Info, len: usize) -> Result<Self::Pre, TransactionValidityError>

fn validate_unsigned( _call: &Self::Call, _info: &<Self::Call as Dispatchable>::Info, _len: usize) -> Result<ValidTransaction, TransactionValidityError>

fn pre_dispatch_unsigned( call: &Self::Call, info: &<Self::Call as Dispatchable>::Info, len: usize) -> Result<Self::Pre, TransactionValidityError>

fn post_dispatch( _pre: Self::Pre, _info: &<Self::Call as Dispatchable>::Info, _post_info: &<Self::Call as Dispatchable>::PostInfo, _len: usize, _result: &Result<(), DispatchError>) -> Result<(), TransactionValidityError>

fn identifier() -> Vec<&'static str>

Implementations on Foreign Types

type AccountId = AccountId

type Call = Call

const IDENTIFIER: &'static str[src]

fn additional_signed( &self) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9) as SignedExtension>::AdditionalSigned, TransactionValidityError>[src]

fn identifier() -> Vec<&'static str>[src]

impl SignedExtension for ()[src]

type AccountId = u64

type AdditionalSigned = ()

type Call = ()

type Pre = ()

const IDENTIFIER: &'static str[src]

fn additional_signed(&self) -> Result<(), TransactionValidityError>[src]

type AccountId = AccountId

type Call = Call

const IDENTIFIER: &'static str[src]

type AdditionalSigned = (<TupleElement0 as SignedExtension>::AdditionalSigned, <TupleElement1 as SignedExtension>::AdditionalSigned, <TupleElement2 as SignedExtension>::AdditionalSigned)

type Pre = (<TupleElement0 as SignedExtension>::Pre, <TupleElement1 as SignedExtension>::Pre, <TupleElement2 as SignedExtension>::Pre)

fn additional_signed( &self) -> Result<<(TupleElement0, TupleElement1, TupleElement2) as SignedExtension>::AdditionalSigned, TransactionValidityError>[src]

fn validate_unsigned( call: &<(TupleElement0, TupleElement1, TupleElement2) as SignedExtension>::Call, info: &<<(TupleElement0, TupleElement1, TupleElement2) as SignedExtension>::Call as Dispatchable>::Info, len: usize) -> Result<ValidTransaction, TransactionValidityError>[src]

fn identifier() -> Vec<&'static str>[src]

type AccountId = AccountId

type Call = Call

const IDENTIFIER: &'static str[src]

type AdditionalSigned = (<TupleElement0 as SignedExtension>::AdditionalSigned, <TupleElement1 as SignedExtension>::AdditionalSigned)

type Pre = (<TupleElement0 as SignedExtension>::Pre, <TupleElement1 as SignedExtension>::Pre)

fn additional_signed( &self) -> Result<<(TupleElement0, TupleElement1) as SignedExtension>::AdditionalSigned, TransactionValidityError>[src]

fn validate_unsigned( call: &<(TupleElement0, TupleElement1) as SignedExtension>::Call, info: &<<(TupleElement0, TupleElement1) as SignedExtension>::Call as Dispatchable>::Info, len: usize) -> Result<ValidTransaction, TransactionValidityError>[src]

fn pre_dispatch_unsigned( call: &<(TupleElement0, TupleElement1) as SignedExtension>::Call, info: &<<(TupleElement0, TupleElement1) as SignedExtension>::Call as Dispatchable>::Info, len: usize) -> Result<<(TupleElement0, TupleElement1) as SignedExtension>::Pre, TransactionValidityError>[src]

fn identifier() -> Vec<&'static str>[src]

type AccountId = AccountId

type Call = Call

const IDENTIFIER: &'static str[src]

fn additional_signed( &self) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7) as SignedExtension>::AdditionalSigned, TransactionValidityError>[src]

fn identifier() -> Vec<&'static str>[src]

type AccountId = AccountId

type Call = Call

const IDENTIFIER: &'static str[src]

type Pre = (<TupleElement0 as SignedExtension>::Pre, <TupleElement1 as SignedExtension>::Pre, <TupleElement2 as SignedExtension>::Pre, <TupleElement3 as SignedExtension>::Pre, <TupleElement4 as SignedExtension>::Pre, <TupleElement5 as SignedExtension>::Pre, <TupleElement6 as SignedExtension>::Pre)

fn additional_signed( &self) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6) as SignedExtension>::AdditionalSigned, TransactionValidityError>[src]

fn identifier() -> Vec<&'static str>[src]

type AccountId = AccountId

type Call = Call

const IDENTIFIER: &'static str[src]

fn additional_signed( &self) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9, TupleElement10, TupleElement11) as SignedExtension>::AdditionalSigned, TransactionValidityError>[src]

fn identifier() -> Vec<&'static str>[src]

type AccountId = AccountId

type Call = Call

const IDENTIFIER: &'static str[src]

fn additional_signed( &self) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9, TupleElement10) as SignedExtension>::AdditionalSigned, TransactionValidityError>[src]

fn identifier() -> Vec<&'static str>[src]

type AccountId = AccountId

type Call = Call

const IDENTIFIER: &'static str[src]

fn additional_signed( &self) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8) as SignedExtension>::AdditionalSigned, TransactionValidityError>[src]

fn identifier() -> Vec<&'static str>[src]

type AccountId = AccountId

type Call = Call

const IDENTIFIER: &'static str[src]

type AdditionalSigned = (<TupleElement0 as SignedExtension>::AdditionalSigned, <TupleElement1 as SignedExtension>::AdditionalSigned, <TupleElement2 as SignedExtension>::AdditionalSigned, <TupleElement3 as SignedExtension>::AdditionalSigned, <TupleElement4 as SignedExtension>::AdditionalSigned)

type Pre = (<TupleElement0 as SignedExtension>::Pre, <TupleElement1 as SignedExtension>::Pre, <TupleElement2 as SignedExtension>::Pre, <TupleElement3 as SignedExtension>::Pre, <TupleElement4 as SignedExtension>::Pre)

fn additional_signed( &self) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4) as SignedExtension>::AdditionalSigned, TransactionValidityError>[src]

fn identifier() -> Vec<&'static str>[src]

`type AccountId`

`type Call: Dispatchable`

`type AdditionalSigned: Encode`

`type Pre: Default`

`const IDENTIFIER: &'static str`

`fn additional_signed( &self ) -> Result<Self::AdditionalSigned, TransactionValidityError>`

`fn validate( &self, _who: &Self::AccountId, _call: &Self::Call, _info: &<Self::Call as Dispatchable>::Info, _len: usize ) -> Result<ValidTransaction, TransactionValidityError>`

`fn pre_dispatch( self, who: &Self::AccountId, call: &Self::Call, info: &<Self::Call as Dispatchable>::Info, len: usize ) -> Result<Self::Pre, TransactionValidityError>`

`fn validate_unsigned( _call: &Self::Call, _info: &<Self::Call as Dispatchable>::Info, _len: usize ) -> Result<ValidTransaction, TransactionValidityError>`

`fn pre_dispatch_unsigned( call: &Self::Call, info: &<Self::Call as Dispatchable>::Info, len: usize ) -> Result<Self::Pre, TransactionValidityError>`

`fn post_dispatch( _pre: Self::Pre, _info: &<Self::Call as Dispatchable>::Info, _post_info: &<Self::Call as Dispatchable>::PostInfo, _len: usize, _result: &Result<(), DispatchError> ) -> Result<(), TransactionValidityError>`

`fn identifier() -> Vec<&'static str>`

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]

`fn identifier() -> Vec<&'static str>`[src]

`impl SignedExtension for ()`[src]

`type AccountId = u64`

`type AdditionalSigned = ()`

`type Call = ()`

`type Pre = ()`

`const IDENTIFIER: &'static str`[src]

`fn additional_signed(&self) -> Result<(), TransactionValidityError>`[src]

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`type AdditionalSigned = (<TupleElement0 as SignedExtension>::AdditionalSigned, <TupleElement1 as SignedExtension>::AdditionalSigned, <TupleElement2 as SignedExtension>::AdditionalSigned)`

`type Pre = (<TupleElement0 as SignedExtension>::Pre, <TupleElement1 as SignedExtension>::Pre, <TupleElement2 as SignedExtension>::Pre)`

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1, TupleElement2) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]

`fn validate_unsigned( call: &<(TupleElement0, TupleElement1, TupleElement2) as SignedExtension>::Call, info: &<<(TupleElement0, TupleElement1, TupleElement2) as SignedExtension>::Call as Dispatchable>::Info, len: usize ) -> Result<ValidTransaction, TransactionValidityError>`[src]

`fn identifier() -> Vec<&'static str>`[src]

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`type AdditionalSigned = (<TupleElement0 as SignedExtension>::AdditionalSigned, <TupleElement1 as SignedExtension>::AdditionalSigned)`

`type Pre = (<TupleElement0 as SignedExtension>::Pre, <TupleElement1 as SignedExtension>::Pre)`

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]

`fn validate_unsigned( call: &<(TupleElement0, TupleElement1) as SignedExtension>::Call, info: &<<(TupleElement0, TupleElement1) as SignedExtension>::Call as Dispatchable>::Info, len: usize ) -> Result<ValidTransaction, TransactionValidityError>`[src]

`fn pre_dispatch_unsigned( call: &<(TupleElement0, TupleElement1) as SignedExtension>::Call, info: &<<(TupleElement0, TupleElement1) as SignedExtension>::Call as Dispatchable>::Info, len: usize ) -> Result<<(TupleElement0, TupleElement1) as SignedExtension>::Pre, TransactionValidityError>`[src]

`fn identifier() -> Vec<&'static str>`[src]

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]

`fn identifier() -> Vec<&'static str>`[src]

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]

`fn identifier() -> Vec<&'static str>`[src]

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9, TupleElement10, TupleElement11) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]

`fn identifier() -> Vec<&'static str>`[src]

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8, TupleElement9, TupleElement10) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]

`fn identifier() -> Vec<&'static str>`[src]

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5, TupleElement6, TupleElement7, TupleElement8) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]

`fn identifier() -> Vec<&'static str>`[src]

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`type AdditionalSigned = (<TupleElement0 as SignedExtension>::AdditionalSigned, <TupleElement1 as SignedExtension>::AdditionalSigned, <TupleElement2 as SignedExtension>::AdditionalSigned, <TupleElement3 as SignedExtension>::AdditionalSigned, <TupleElement4 as SignedExtension>::AdditionalSigned)`

`type Pre = (<TupleElement0 as SignedExtension>::Pre, <TupleElement1 as SignedExtension>::Pre, <TupleElement2 as SignedExtension>::Pre, <TupleElement3 as SignedExtension>::Pre, <TupleElement4 as SignedExtension>::Pre)`

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]

`fn identifier() -> Vec<&'static str>`[src]

`type AccountId = AccountId`

`type Call = Call`

`const IDENTIFIER: &'static str`[src]

`type Pre = (<TupleElement0 as SignedExtension>::Pre, <TupleElement1 as SignedExtension>::Pre, <TupleElement2 as SignedExtension>::Pre, <TupleElement3 as SignedExtension>::Pre, <TupleElement4 as SignedExtension>::Pre, <TupleElement5 as SignedExtension>::Pre)`

`fn additional_signed( &self ) -> Result<<(TupleElement0, TupleElement1, TupleElement2, TupleElement3, TupleElement4, TupleElement5) as SignedExtension>::AdditionalSigned, TransactionValidityError>`[src]