mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-14 12:11:09 +00:00
FRAME: Create TransactionExtension as a replacement for SignedExtension (#2280)
Closes #2160 First part of [Extrinsic Horizon](https://github.com/paritytech/polkadot-sdk/issues/2415) Introduces a new trait `TransactionExtension` to replace `SignedExtension`. Introduce the idea of transactions which obey the runtime's extensions and have according Extension data (né Extra data) yet do not have hard-coded signatures. Deprecate the terminology of "Unsigned" when used for transactions/extrinsics owing to there now being "proper" unsigned transactions which obey the extension framework and "old-style" unsigned which do not. Instead we have __*General*__ for the former and __*Bare*__ for the latter. (Ultimately, the latter will be phased out as a type of transaction, and Bare will only be used for Inherents.) Types of extrinsic are now therefore: - Bare (no hardcoded signature, no Extra data; used to be known as "Unsigned") - Bare transactions (deprecated): Gossiped, validated with `ValidateUnsigned` (deprecated) and the `_bare_compat` bits of `TransactionExtension` (deprecated). - Inherents: Not gossiped, validated with `ProvideInherent`. - Extended (Extra data): Gossiped, validated via `TransactionExtension`. - Signed transactions (with a hardcoded signature). - General transactions (without a hardcoded signature). `TransactionExtension` differs from `SignedExtension` because: - A signature on the underlying transaction may validly not be present. - It may alter the origin during validation. - `pre_dispatch` is renamed to `prepare` and need not contain the checks present in `validate`. - `validate` and `prepare` is passed an `Origin` rather than a `AccountId`. - `validate` may pass arbitrary information into `prepare` via a new user-specifiable type `Val`. - `AdditionalSigned`/`additional_signed` is renamed to `Implicit`/`implicit`. It is encoded *for the entire transaction* and passed in to each extension as a new argument to `validate`. This facilitates the ability of extensions to acts as underlying crypto. There is a new `DispatchTransaction` trait which contains only default function impls and is impl'ed for any `TransactionExtension` impler. It provides several utility functions which reduce some of the tedium from using `TransactionExtension` (indeed, none of its regular functions should now need to be called directly). Three transaction version discriminator ("versions") are now permissible: - 0b000000100: Bare (used to be called "Unsigned"): contains Signature or Extra (extension data). After bare transactions are no longer supported, this will strictly identify an Inherents only. - 0b100000100: Old-school "Signed" Transaction: contains Signature and Extra (extension data). - 0b010000100: New-school "General" Transaction: contains Extra (extension data), but no Signature. For the New-school General Transaction, it becomes trivial for authors to publish extensions to the mechanism for authorizing an Origin, e.g. through new kinds of key-signing schemes, ZK proofs, pallet state, mutations over pre-authenticated origins or any combination of the above. ## Code Migration ### NOW: Getting it to build Wrap your `SignedExtension`s in `AsTransactionExtension`. This should be accompanied by renaming your aggregate type in line with the new terminology. E.g. Before: ```rust /// The SignedExtension to the basic transaction logic. pub type SignedExtra = ( /* snip */ MySpecialSignedExtension, ); /// Unchecked extrinsic type as expected by this runtime. pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, RuntimeCall, Signature, SignedExtra>; ``` After: ```rust /// The extension to the basic transaction logic. pub type TxExtension = ( /* snip */ AsTransactionExtension<MySpecialSignedExtension>, ); /// Unchecked extrinsic type as expected by this runtime. pub type UncheckedExtrinsic = generic::UncheckedExtrinsic<Address, RuntimeCall, Signature, TxExtension>; ``` You'll also need to alter any transaction building logic to add a `.into()` to make the conversion happen. E.g. Before: ```rust fn construct_extrinsic( /* snip */ ) -> UncheckedExtrinsic { let extra: SignedExtra = ( /* snip */ MySpecialSignedExtension::new(/* snip */), ); let payload = SignedPayload::new(call.clone(), extra.clone()).unwrap(); let signature = payload.using_encoded(|e| sender.sign(e)); UncheckedExtrinsic::new_signed( /* snip */ Signature::Sr25519(signature), extra, ) } ``` After: ```rust fn construct_extrinsic( /* snip */ ) -> UncheckedExtrinsic { let tx_ext: TxExtension = ( /* snip */ MySpecialSignedExtension::new(/* snip */).into(), ); let payload = SignedPayload::new(call.clone(), tx_ext.clone()).unwrap(); let signature = payload.using_encoded(|e| sender.sign(e)); UncheckedExtrinsic::new_signed( /* snip */ Signature::Sr25519(signature), tx_ext, ) } ``` ### SOON: Migrating to `TransactionExtension` Most `SignedExtension`s can be trivially converted to become a `TransactionExtension`. There are a few things to know. - Instead of a single trait like `SignedExtension`, you should now implement two traits individually: `TransactionExtensionBase` and `TransactionExtension`. - Weights are now a thing and must be provided via the new function `fn weight`. #### `TransactionExtensionBase` This trait takes care of anything which is not dependent on types specific to your runtime, most notably `Call`. - `AdditionalSigned`/`additional_signed` is renamed to `Implicit`/`implicit`. - Weight must be returned by implementing the `weight` function. If your extension is associated with a pallet, you'll probably want to do this via the pallet's existing benchmarking infrastructure. #### `TransactionExtension` Generally: - `pre_dispatch` is now `prepare` and you *should not reexecute the `validate` functionality in there*! - You don't get an account ID any more; you get an origin instead. If you need to presume an account ID, then you can use the trait function `AsSystemOriginSigner::as_system_origin_signer`. - You get an additional ticket, similar to `Pre`, called `Val`. This defines data which is passed from `validate` into `prepare`. This is important since you should not be duplicating logic from `validate` to `prepare`, you need a way of passing your working from the former into the latter. This is it. - This trait takes two type parameters: `Call` and `Context`. `Call` is the runtime call type which used to be an associated type; you can just move it to become a type parameter for your trait impl. `Context` is not currently used and you can safely implement over it as an unbounded type. - There's no `AccountId` associated type any more. Just remove it. Regarding `validate`: - You get three new parameters in `validate`; all can be ignored when migrating from `SignedExtension`. - `validate` returns a tuple on success; the second item in the tuple is the new ticket type `Self::Val` which gets passed in to `prepare`. If you use any information extracted during `validate` (off-chain and on-chain, non-mutating) in `prepare` (on-chain, mutating) then you can pass it through with this. For the tuple's last item, just return the `origin` argument. Regarding `prepare`: - This is renamed from `pre_dispatch`, but there is one change: - FUNCTIONALITY TO VALIDATE THE TRANSACTION NEED NOT BE DUPLICATED FROM `validate`!! - (This is different to `SignedExtension` which was required to run the same checks in `pre_dispatch` as in `validate`.) Regarding `post_dispatch`: - Since there are no unsigned transactions handled by `TransactionExtension`, `Pre` is always defined, so the first parameter is `Self::Pre` rather than `Option<Self::Pre>`. If you make use of `SignedExtension::validate_unsigned` or `SignedExtension::pre_dispatch_unsigned`, then: - Just use the regular versions of these functions instead. - Have your logic execute in the case that the `origin` is `None`. - Ensure your transaction creation logic creates a General Transaction rather than a Bare Transaction; this means having to include all `TransactionExtension`s' data. - `ValidateUnsigned` can still be used (for now) if you need to be able to construct transactions which contain none of the extension data, however these will be phased out in stage 2 of the Transactions Horizon, so you should consider moving to an extension-centric design. ## TODO - [x] Introduce `CheckSignature` impl of `TransactionExtension` to ensure it's possible to have crypto be done wholly in a `TransactionExtension`. - [x] Deprecate `SignedExtension` and move all uses in codebase to `TransactionExtension`. - [x] `ChargeTransactionPayment` - [x] `DummyExtension` - [x] `ChargeAssetTxPayment` (asset-tx-payment) - [x] `ChargeAssetTxPayment` (asset-conversion-tx-payment) - [x] `CheckWeight` - [x] `CheckTxVersion` - [x] `CheckSpecVersion` - [x] `CheckNonce` - [x] `CheckNonZeroSender` - [x] `CheckMortality` - [x] `CheckGenesis` - [x] `CheckOnlySudoAccount` - [x] `WatchDummy` - [x] `PrevalidateAttests` - [x] `GenericSignedExtension` - [x] `SignedExtension` (chain-polkadot-bulletin) - [x] `RefundSignedExtensionAdapter` - [x] Implement `fn weight` across the board. - [ ] Go through all pre-existing extensions which assume an account signer and explicitly handle the possibility of another kind of origin. - [x] `CheckNonce` should probably succeed in the case of a non-account origin. - [x] `CheckNonZeroSender` should succeed in the case of a non-account origin. - [x] `ChargeTransactionPayment` and family should fail in the case of a non-account origin. - [ ] - [x] Fix any broken tests. --------- Signed-off-by: georgepisaltu <george.pisaltu@parity.io> Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io> Signed-off-by: dependabot[bot] <support@github.com> Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io> Signed-off-by: Andrei Sandu <andrei-mihail@parity.io> Co-authored-by: Nikhil Gupta <17176722+gupnik@users.noreply.github.com> Co-authored-by: georgepisaltu <52418509+georgepisaltu@users.noreply.github.com> Co-authored-by: Chevdor <chevdor@users.noreply.github.com> Co-authored-by: Bastian Köcher <git@kchr.de> Co-authored-by: Maciej <maciej.zyszkiewicz@parity.io> Co-authored-by: Javier Viola <javier@parity.io> Co-authored-by: Marcin S. <marcin@realemail.net> Co-authored-by: Tsvetomir Dimitrov <tsvetomir@parity.io> Co-authored-by: Javier Bullrich <javier@bullrich.dev> Co-authored-by: Koute <koute@users.noreply.github.com> Co-authored-by: Adrian Catangiu <adrian@parity.io> Co-authored-by: Vladimir Istyufeev <vladimir@parity.io> Co-authored-by: Ross Bulat <ross@parity.io> Co-authored-by: Gonçalo Pestana <g6pestana@gmail.com> Co-authored-by: Liam Aharon <liam.aharon@hotmail.com> Co-authored-by: Svyatoslav Nikolsky <svyatonik@gmail.com> Co-authored-by: André Silva <123550+andresilva@users.noreply.github.com> Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io> Co-authored-by: s0me0ne-unkn0wn <48632512+s0me0ne-unkn0wn@users.noreply.github.com> Co-authored-by: ordian <write@reusable.software> Co-authored-by: Sebastian Kunert <skunert49@gmail.com> Co-authored-by: Aaro Altonen <48052676+altonen@users.noreply.github.com> Co-authored-by: Dmitry Markin <dmitry@markin.tech> Co-authored-by: Alexandru Vasile <60601340+lexnv@users.noreply.github.com> Co-authored-by: Alexander Samusev <41779041+alvicsam@users.noreply.github.com> Co-authored-by: Julian Eager <eagr@tutanota.com> Co-authored-by: Michal Kucharczyk <1728078+michalkucharczyk@users.noreply.github.com> Co-authored-by: Davide Galassi <davxy@datawok.net> Co-authored-by: Dónal Murray <donal.murray@parity.io> Co-authored-by: yjh <yjh465402634@gmail.com> Co-authored-by: Tom Mi <tommi@niemi.lol> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: Will | Paradox | ParaNodes.io <79228812+paradox-tt@users.noreply.github.com> Co-authored-by: Bastian Köcher <info@kchr.de> Co-authored-by: Joshy Orndorff <JoshOrndorff@users.noreply.github.com> Co-authored-by: Joshy Orndorff <git-user-email.h0ly5@simplelogin.com> Co-authored-by: PG Herveou <pgherveou@gmail.com> Co-authored-by: Alexander Theißen <alex.theissen@me.com> Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com> Co-authored-by: Juan Girini <juangirini@gmail.com> Co-authored-by: bader y <ibnbassem@gmail.com> Co-authored-by: James Wilson <james@jsdw.me> Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com> Co-authored-by: asynchronous rob <rphmeier@gmail.com> Co-authored-by: Parth <desaiparth08@gmail.com> Co-authored-by: Andrew Jones <ascjones@gmail.com> Co-authored-by: Jonathan Udd <jonathan@dwellir.com> Co-authored-by: Serban Iorga <serban@parity.io> Co-authored-by: Egor_P <egor@parity.io> Co-authored-by: Branislav Kontur <bkontur@gmail.com> Co-authored-by: Evgeny Snitko <evgeny@parity.io> Co-authored-by: Just van Stam <vstam1@users.noreply.github.com> Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com> Co-authored-by: gupnik <nikhilgupta.iitk@gmail.com> Co-authored-by: dzmitry-lahoda <dzmitry@lahoda.pro> Co-authored-by: zhiqiangxu <652732310@qq.com> Co-authored-by: Nazar Mokrynskyi <nazar@mokrynskyi.com> Co-authored-by: Anwesh <anweshknayak@gmail.com> Co-authored-by: cheme <emericchevalier.pro@gmail.com> Co-authored-by: Sam Johnson <sam@durosoft.com> Co-authored-by: kianenigma <kian@parity.io> Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com> Co-authored-by: Muharem <ismailov.m.h@gmail.com> Co-authored-by: joepetrowski <joe@parity.io> Co-authored-by: Alexandru Gheorghe <49718502+alexggh@users.noreply.github.com> Co-authored-by: Gabriel Facco de Arruda <arrudagates@gmail.com> Co-authored-by: Squirrel <gilescope@gmail.com> Co-authored-by: Andrei Sandu <54316454+sandreim@users.noreply.github.com> Co-authored-by: georgepisaltu <george.pisaltu@parity.io> Co-authored-by: command-bot <>
This commit is contained in:
Gavin Wood
@@ -62,23 +62,28 @@ pub use payment::*;
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use sp_runtime::{
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traits::{
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Convert, DispatchInfoOf, Dispatchable, One, PostDispatchInfoOf, SaturatedConversion,
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Saturating, SignedExtension, Zero,
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Saturating, TransactionExtension, TransactionExtensionBase, Zero,
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},
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transaction_validity::{
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TransactionPriority, TransactionValidity, TransactionValidityError, ValidTransaction,
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InvalidTransaction, TransactionPriority, TransactionValidityError, ValidTransaction,
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},
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FixedPointNumber, FixedU128, Perbill, Perquintill, RuntimeDebug,
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};
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use sp_std::prelude::*;
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pub use types::{FeeDetails, InclusionFee, RuntimeDispatchInfo};
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pub use weights::WeightInfo;
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#[cfg(test)]
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mod mock;
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#[cfg(test)]
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mod tests;
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#[cfg(feature = "runtime-benchmarks")]
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mod benchmarking;
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mod payment;
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mod types;
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pub mod weights;
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/// Fee multiplier.
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pub type Multiplier = FixedU128;
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@@ -335,6 +340,7 @@ pub mod pallet {
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type RuntimeEvent = ();
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type FeeMultiplierUpdate = ();
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type OperationalFeeMultiplier = ();
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type WeightInfo = ();
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}
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}
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@@ -387,6 +393,9 @@ pub mod pallet {
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/// transactions.
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#[pallet::constant]
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type OperationalFeeMultiplier: Get<u8>;
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/// The weight information of this pallet.
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type WeightInfo: WeightInfo;
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}
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#[pallet::type_value]
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@@ -507,11 +516,11 @@ impl<T: Config> Pallet<T> {
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// a very very little potential gain in the future.
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let dispatch_info = <Extrinsic as GetDispatchInfo>::get_dispatch_info(&unchecked_extrinsic);
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let partial_fee = if unchecked_extrinsic.is_signed().unwrap_or(false) {
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Self::compute_fee(len, &dispatch_info, 0u32.into())
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} else {
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// Unsigned extrinsics have no partial fee.
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let partial_fee = if unchecked_extrinsic.is_bare() {
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// Bare extrinsics have no partial fee.
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0u32.into()
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} else {
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Self::compute_fee(len, &dispatch_info, 0u32.into())
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};
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let DispatchInfo { weight, class, .. } = dispatch_info;
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@@ -531,11 +540,11 @@ impl<T: Config> Pallet<T> {
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let tip = 0u32.into();
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if unchecked_extrinsic.is_signed().unwrap_or(false) {
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Self::compute_fee_details(len, &dispatch_info, tip)
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} else {
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// Unsigned extrinsics have no inclusion fee.
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if unchecked_extrinsic.is_bare() {
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// Bare extrinsics have no inclusion fee.
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FeeDetails { inclusion_fee: None, tip }
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} else {
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Self::compute_fee_details(len, &dispatch_info, tip)
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}
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}
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@@ -714,7 +723,7 @@ where
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who: &T::AccountId,
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call: &T::RuntimeCall,
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info: &DispatchInfoOf<T::RuntimeCall>,
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len: usize,
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fee: BalanceOf<T>,
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) -> Result<
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(
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BalanceOf<T>,
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@@ -723,7 +732,6 @@ where
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TransactionValidityError,
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> {
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let tip = self.0;
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let fee = Pallet::<T>::compute_fee(len as u32, info, tip);
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<<T as Config>::OnChargeTransaction as OnChargeTransaction<T>>::withdraw_fee(
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who, call, info, fee, tip,
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@@ -731,6 +739,22 @@ where
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.map(|i| (fee, i))
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}
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fn can_withdraw_fee(
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&self,
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who: &T::AccountId,
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call: &T::RuntimeCall,
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info: &DispatchInfoOf<T::RuntimeCall>,
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len: usize,
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) -> Result<BalanceOf<T>, TransactionValidityError> {
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let tip = self.0;
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let fee = Pallet::<T>::compute_fee(len as u32, info, tip);
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<<T as Config>::OnChargeTransaction as OnChargeTransaction<T>>::can_withdraw_fee(
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who, call, info, fee, tip,
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)?;
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Ok(fee)
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}
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/// Get an appropriate priority for a transaction with the given `DispatchInfo`, encoded length
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/// and user-included tip.
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///
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@@ -817,67 +841,93 @@ impl<T: Config> sp_std::fmt::Debug for ChargeTransactionPayment<T> {
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}
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}
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impl<T: Config> SignedExtension for ChargeTransactionPayment<T>
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impl<T: Config> TransactionExtensionBase for ChargeTransactionPayment<T> {
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const IDENTIFIER: &'static str = "ChargeTransactionPayment";
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type Implicit = ();
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fn weight(&self) -> Weight {
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T::WeightInfo::charge_transaction_payment()
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}
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}
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impl<T: Config, Context> TransactionExtension<T::RuntimeCall, Context>
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for ChargeTransactionPayment<T>
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where
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BalanceOf<T>: Send + Sync + From<u64>,
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T::RuntimeCall: Dispatchable<Info = DispatchInfo, PostInfo = PostDispatchInfo>,
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{
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const IDENTIFIER: &'static str = "ChargeTransactionPayment";
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type AccountId = T::AccountId;
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type Call = T::RuntimeCall;
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type AdditionalSigned = ();
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type Val = (
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// tip
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BalanceOf<T>,
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// who paid the fee
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T::AccountId,
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// computed fee
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BalanceOf<T>,
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);
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type Pre = (
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// tip
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BalanceOf<T>,
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// who paid the fee - this is an option to allow for a Default impl.
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Self::AccountId,
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// who paid the fee
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T::AccountId,
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// imbalance resulting from withdrawing the fee
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<<T as Config>::OnChargeTransaction as OnChargeTransaction<T>>::LiquidityInfo,
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);
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fn additional_signed(&self) -> sp_std::result::Result<(), TransactionValidityError> {
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Ok(())
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}
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fn validate(
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&self,
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who: &Self::AccountId,
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call: &Self::Call,
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info: &DispatchInfoOf<Self::Call>,
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origin: <T::RuntimeCall as Dispatchable>::RuntimeOrigin,
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call: &T::RuntimeCall,
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info: &DispatchInfoOf<T::RuntimeCall>,
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len: usize,
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) -> TransactionValidity {
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let (final_fee, _) = self.withdraw_fee(who, call, info, len)?;
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_context: &mut Context,
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_: (),
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_implication: &impl Encode,
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) -> Result<
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(ValidTransaction, Self::Val, <T::RuntimeCall as Dispatchable>::RuntimeOrigin),
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TransactionValidityError,
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> {
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let who = frame_system::ensure_signed(origin.clone())
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.map_err(|_| InvalidTransaction::BadSigner)?;
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let final_fee = self.can_withdraw_fee(&who, call, info, len)?;
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let tip = self.0;
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Ok(ValidTransaction {
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priority: Self::get_priority(info, len, tip, final_fee),
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..Default::default()
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})
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Ok((
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ValidTransaction {
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priority: Self::get_priority(info, len, tip, final_fee),
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..Default::default()
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},
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(self.0, who, final_fee),
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origin,
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))
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}
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fn pre_dispatch(
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fn prepare(
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self,
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who: &Self::AccountId,
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call: &Self::Call,
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info: &DispatchInfoOf<Self::Call>,
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len: usize,
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val: Self::Val,
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_origin: &<T::RuntimeCall as Dispatchable>::RuntimeOrigin,
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call: &T::RuntimeCall,
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info: &DispatchInfoOf<T::RuntimeCall>,
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_len: usize,
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_context: &Context,
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) -> Result<Self::Pre, TransactionValidityError> {
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let (_fee, imbalance) = self.withdraw_fee(who, call, info, len)?;
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Ok((self.0, who.clone(), imbalance))
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let (tip, who, fee) = val;
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// Mutating call to `withdraw_fee` to actually charge for the transaction.
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let (_final_fee, imbalance) = self.withdraw_fee(&who, call, info, fee)?;
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Ok((tip, who, imbalance))
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}
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fn post_dispatch(
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maybe_pre: Option<Self::Pre>,
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info: &DispatchInfoOf<Self::Call>,
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post_info: &PostDispatchInfoOf<Self::Call>,
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(tip, who, imbalance): Self::Pre,
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info: &DispatchInfoOf<T::RuntimeCall>,
|
||||
post_info: &PostDispatchInfoOf<T::RuntimeCall>,
|
||||
len: usize,
|
||||
_result: &DispatchResult,
|
||||
_context: &Context,
|
||||
) -> Result<(), TransactionValidityError> {
|
||||
if let Some((tip, who, imbalance)) = maybe_pre {
|
||||
let actual_fee = Pallet::<T>::compute_actual_fee(len as u32, info, post_info, tip);
|
||||
T::OnChargeTransaction::correct_and_deposit_fee(
|
||||
&who, info, post_info, actual_fee, tip, imbalance,
|
||||
)?;
|
||||
Pallet::<T>::deposit_event(Event::<T>::TransactionFeePaid { who, actual_fee, tip });
|
||||
}
|
||||
let actual_fee = Pallet::<T>::compute_actual_fee(len as u32, info, post_info, tip);
|
||||
T::OnChargeTransaction::correct_and_deposit_fee(
|
||||
&who, info, post_info, actual_fee, tip, imbalance,
|
||||
)?;
|
||||
Pallet::<T>::deposit_event(Event::<T>::TransactionFeePaid { who, actual_fee, tip });
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user