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  1. Mar 13, 2024
    • georgepisaltu's avatar
      Revert "FRAME: Create `TransactionExtension` as a replacement for... · bbd51ce8
      georgepisaltu authored
      
      Revert "FRAME: Create `TransactionExtension` as a replacement for `SignedExtension` (#2280)" (#3665)
      
      This PR reverts #2280 which introduced `TransactionExtension` to replace
      `SignedExtension`.
      
      As a result of the discussion
      [here](https://github.com/paritytech/polkadot-sdk/pull/3623#issuecomment-1986789700),
      the changes will be reverted for now with plans to reintroduce the
      concept in the future.
      
      ---------
      
      Signed-off-by: default avatargeorgepisaltu <[email protected]>
      bbd51ce8
  2. Mar 04, 2024
    • Gavin Wood's avatar
      FRAME: Create `TransactionExtension` as a replacement for `SignedExtension` (#2280) · fd5f9292
      Gavin Wood authored
      
      
      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: default avatargeorgepisaltu <[email protected]>
      Signed-off-by: default avatarAlexandru Vasile <[email protected]>
      Signed-off-by: default avatardependabot[bot] <[email protected]>
      Signed-off-by: default avatarOliver Tale-Yazdi <[email protected]>
      Signed-off-by: default avatarAlexandru Gheorghe <[email protected]>
      Signed-off-by: default avatarAndrei Sandu <[email protected]>
      Co-authored-by: default avatarNikhil Gupta <[email protected]>
      Co-authored-by: default avatargeorgepisaltu <[email protected]>
      Co-authored-by: default avatarChevdor <[email protected]>
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      Co-authored-by: default avatarMaciej <[email protected]>
      Co-authored-by: default avatarJavier Viola <[email protected]>
      Co-authored-by: default avatarMarcin S. <[email protected]>
      Co-authored-by: default avatarTsvetomir Dimitrov <[email protected]>
      Co-authored-by: default avatarJavier Bullrich <[email protected]>
      Co-authored-by: default avatarKoute <[email protected]>
      Co-authored-by: default avatarAdrian Catangiu <[email protected]>
      Co-authored-by: Vladimir Istyufeev's avatarVladimir Istyufeev <[email protected]>
      Co-authored-by: default avatarRoss Bulat <[email protected]>
      Co-authored-by: default avatarGonçalo Pestana <[email protected]>
      Co-authored-by: default avatarLiam Aharon <[email protected]>
      Co-authored-by: default avatarSvyatoslav Nikolsky <[email protected]>
      Co-authored-by: default avatarAndré Silva <[email protected]>
      Co-authored-by: default avatarOliver Tale-Yazdi <[email protected]>
      Co-authored-by: default avatars0me0ne-unkn0wn <[email protected]>
      Co-authored-by: default avatarordian <[email protected]>
      Co-authored-by: default avatarSebastian Kunert <[email protected]>
      Co-authored-by: default avatarAaro Altonen <[email protected]>
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      Co-authored-by: default avatarMichal Kucharczyk <[email protected]>
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      Co-authored-by: default avatarDónal Murray <[email protected]>
      Co-authored-by: default avataryjh <[email protected]>
      Co-authored-by: default avatarTom Mi <[email protected]>
      Co-authored-by: default avatardependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
      Co-authored-by: default avatarWill | Paradox | ParaNodes.io <[email protected]>
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      Co-authored-by: default avatarJoshy Orndorff <[email protected]>
      Co-authored-by: default avatarJoshy Orndorff <[email protected]>
      Co-authored-by: default avatarPG Herveou <[email protected]>
      Co-authored-by: default avatarAlexander Theißen <[email protected]>
      Co-authored-by: default avatarKian Paimani <[email protected]>
      Co-authored-by: default avatarJuan Girini <[email protected]>
      Co-authored-by: default avatarbader y <[email protected]>
      Co-authored-by: default avatarJames Wilson <[email protected]>
      Co-authored-by: default avatarjoe petrowski <[email protected]>
      Co-authored-by: default avatarasynchronous rob <[email protected]>
      Co-authored-by: default avatarParth <[email protected]>
      Co-authored-by: default avatarAndrew Jones <[email protected]>
      Co-authored-by: default avatarJonathan Udd <[email protected]>
      Co-authored-by: default avatarSerban Iorga <[email protected]>
      Co-authored-by: default avatarEgor_P <[email protected]>
      Co-authored-by: default avatarBranislav Kontur <[email protected]>
      Co-authored-by: default avatarEvgeny Snitko <[email protected]>
      Co-authored-by: default avatarJust van Stam <[email protected]>
      Co-authored-by: default avatarFrancisco Aguirre <[email protected]>
      Co-authored-by: default avatargupnik <[email protected]>
      Co-authored-by: default avatardzmitry-lahoda <[email protected]>
      Co-authored-by: default avatarzhiqiangxu <[email protected]>
      Co-authored-by: default avatarNazar Mokrynskyi <[email protected]>
      Co-authored-by: default avatarAnwesh <[email protected]>
      Co-authored-by: default avatarcheme <[email protected]>
      Co-authored-by: default avatarSam Johnson <[email protected]>
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      Co-authored-by: default avatarMuharem <[email protected]>
      Co-authored-by: default avatarjoepetrowski <[email protected]>
      Co-authored-by: default avatarAlexandru Gheorghe <[email protected]>
      Co-authored-by: default avatarGabriel Facco de Arruda <[email protected]>
      Co-authored-by: default avatarSquirrel <[email protected]>
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      Co-authored-by: default avatargeorgepisaltu <[email protected]>
      Co-authored-by: command-bot <>
      fd5f9292
  3. Feb 26, 2024
    • Branislav Kontur's avatar
      [pallet-xcm] Adjust benchmarks (teleport_assets/reserve_transfer_assets) not relying on ED (#3464) · 3d9439f6
      Branislav Kontur authored
      
      
      ## Problem
      During the bumping of the `polkadot-fellows` repository to
      `[email protected]`, I encountered a situation where the benchmarks
      `teleport_assets` and `reserve_transfer_assets` in AssetHubKusama
      started to fail. This issue arose due to a decreased ED balance for
      AssetHubs introduced
      [here](https://github.com/polkadot-fellows/runtimes/pull/158/files#diff-80668ff8e793b64f36a9a3ec512df5cbca4ad448c157a5d81abda1b15f35f1daR213),
      and also because of a [missing CI
      pipeline](https://github.com/polkadot-fellows/runtimes/issues/197) to
      check the benchmarks, which went unnoticed.
      
      These benchmarks expect the `caller` to have enough:
      1. balance to transfer (BTT)
      2. balance for paying delivery (BFPD).
       
      So the initial balance was calculated as `ED * 100`, which seems
      reasonable:
      ```
      const ED_MULTIPLIER: u32 = 100;
      let balance = existential_deposit.saturating_mul(ED_MULTIPLIER.into());`
      ```
      The problem arises when the price for delivery is 100 times higher than
      the existential deposit. In other words, when `ED * 100` does not cover
      `BTT` + `BFPD`.
      
      I check AHR/AHW/AHK/AHP and this problem has only AssetHubKusama
      ```
      ED: 3333333
      calculated price to parent delivery:  1031666634  (from xcm logs from the benchmark)
      ---
      
      3333333 * 100 - BTT(3333333) - BFPD(1031666634) = −701666667
      ```
      which results in the error;
      ```
      2024-02-23 09:19:42 Unable to charge fee with error Module(ModuleError { index: 31, error: [17, 0, 0, 0], message: Some("FeesNotMet") })
      Error: Input("Benchmark pallet_xcm::reserve_transfer_assets failed: FeesNotMet")
           
      ```
      
      ## Solution
      
      The benchmarks `teleport_assets` and `reserve_transfer_assets` were
      fixed by removing `ED * 100` and replacing it with `DeliveryHelper`
      logic, which calculates the (almost real) price for delivery and sets it
      along with the existential deposit as the initial balance for the
      account used in the benchmark.
      
      
      ## TODO
      
      - [ ] patch for 1.6 -
      https://github.com/paritytech/polkadot-sdk/pull/3466
      - [ ] patch for 1.7 -
      https://github.com/paritytech/polkadot-sdk/pull/3465
      - [ ] patch for 1.8 - TODO: PR
      
      ---------
      
      Co-authored-by: default avatarFrancisco Aguirre <[email protected]>
      3d9439f6
  4. Feb 19, 2024
    • PG Herveou's avatar
      Contracts: xcm host fn fixes (#3086) · ca382f32
      PG Herveou authored
      ## Xcm changes:
      - Fix `pallet_xcm::execute`, move the logic into The `ExecuteController`
      so it can be shared with anything that implement that trait.
      - Make `ExecuteController::execute` retursn `DispatchErrorWithPostInfo`
      instead of `DispatchError`, so that we don't charge the full
      `max_weight` provided if the execution is incomplete (useful for
      force_batch or contracts calls)
      - Fix docstring for `pallet_xcm::execute`, to reflect the changes from
      #2405
      - Update the signature for `ExecuteController::execute`, we don't need
      to return the `Outcome` anymore since we only care about
      `Outcome::Complete`
      
      ## Contracts changes:
      
      - Update host fn `xcm_exexute`, we don't need to write the `Outcome` to
      the sandbox memory anymore. This was also not charged as well before so
      it if fixes this too.
      - One of the issue was that the dry_run of a contract that call
      `xcm_execute` would exhaust the `gas_limit`.
      
      This is because `XcmExecuteController::execute` takes a `max_weight`
      argument, and since we don't want the user to specify it manually we
      were passing everything left by pre-charghing
      `ctx.ext.gas_meter().gas_left()`
      
      - To fix it I added a `fn influence_lowest_limit` on the `Token` trait
      and make it return false for `RuntimeCost::XcmExecute`.
      - Got rid of the `RuntimeToken` indirection, we can just use
      `RuntimeCost` directly.
      
      ---------
      
      Co-authored-by: command-bot <>
      ca382f32
  5. Feb 13, 2024
  6. Feb 12, 2024
    • Oliver Tale-Yazdi's avatar
      Lift dependencies to the workspace (Part 1) (#2070) · e80c2473
      Oliver Tale-Yazdi authored
      Changes (partial https://github.com/paritytech/polkadot-sdk/issues/994):
      - Set log to `0.4.20` everywhere
      - Lift `log` to the workspace
      
      Starting with a simpler one after seeing
      https://github.com/paritytech/polkadot-sdk/pull/2065 from @jsdw
      
      .
      This sets the `default-features` to `false` in the root and then
      overwrites that in each create to its original value. This is necessary
      since otherwise the `default` features are additive and its impossible
      to disable them in the crate again once they are enabled in the
      workspace.
      
      I am using a tool to do this, so its mostly a test to see that it works
      as expected.
      
      ---------
      
      Signed-off-by: default avatarOliver Tale-Yazdi <[email protected]>
      e80c2473
  7. Jan 31, 2024
    • Branislav Kontur's avatar
      [xcm] Fix `SovereignPaidRemoteExporter` and `DepositAsset` handling (#3157) · 6ea472ad
      Branislav Kontur authored
      This PR addresses two issues:
      - It modifies `DepositAsset`'s asset filter from `All` to
      `AllCounted(1)` to prevent potentially charging excessive weight/fees.
      This adjustment avoids situations where fees could be calculated based
      on the count of assets, as illustrated
      [here](https://github.com/paritytech/polkadot-sdk/blob/master/cumulus/parachains/runtimes/bridge-hubs/bridge-hub-rococo/src/weights/xcm/mod.rs#L38-L46).
      - It encapsulates `DepositAsset` with `SetAppendix` to ensure that
      `fees` are not trapped in any case. For instance, this prevents issues
      when `ExportXcm::validate` encounters an error during the processing of
      `ExportMessage`.
      6ea472ad
    • Branislav Kontur's avatar
      [frame] `#[pallet::composite_enum]` improved variant count handling + removed... · bb8ddc46
      Branislav Kontur authored
      [frame] `#[pallet::composite_enum]` improved variant count handling + removed `pallet_balances`'s `MaxHolds` config (#2657)
      
      I started this investigation/issue based on @liamaharon
      
       question
      [here](https://github.com/paritytech/polkadot-sdk/pull/1801#discussion_r1410452499).
      
      ## Problem
      
      The `pallet_balances` integrity test should correctly detect that the
      runtime has correct distinct `HoldReasons` variant count. I assume the
      same situation exists for RuntimeFreezeReason.
      
      It is not a critical problem, if we set `MaxHolds` with a sufficiently
      large value, everything should be ok. However, in this case, the
      integrity_test check becomes less useful.
      
      **Situation for "any" runtime:**
      - `HoldReason` enums from different pallets:
      ```rust
              /// from pallet_nis
              #[pallet::composite_enum]
      	pub enum HoldReason {
      		NftReceipt,
      	}
      
              /// from pallet_preimage
              #[pallet::composite_enum]
      	pub enum HoldReason {
      		Preimage,
      	}
      
              // from pallet_state-trie-migration
              #[pallet::composite_enum]
      	pub enum HoldReason {
      		SlashForContinueMigrate,
      		SlashForMigrateCustomTop,
      		SlashForMigrateCustomChild,
      	}
      ```
      
      - generated `RuntimeHoldReason` enum looks like:
      ```rust
      pub enum RuntimeHoldReason {
      
          #[codec(index = 32u8)]
          Preimage(pallet_preimage::HoldReason),
      
          #[codec(index = 38u8)]
          Nis(pallet_nis::HoldReason),
      
          #[codec(index = 42u8)]
          StateTrieMigration(pallet_state_trie_migration::HoldReason),
      }
      ```
      
      - composite enum `RuntimeHoldReason` variant count is detected as `3`
      - we set `type MaxHolds = ConstU32<3>`
      - `pallet_balances::integrity_test` is ok with `3`(at least 3)
      
      However, the real problem can occur in a live runtime where some
      functionality might stop working. This is due to a total of 5 distinct
      hold reasons (for pallets with multi-instance support, it is even more),
      and not all of them can be used because of an incorrect `MaxHolds`,
      which is deemed acceptable according to the `integrity_test`:
        ```
        // pseudo-code - if we try to call all of these:
      
      T::Currency::hold(&pallet_nis::HoldReason::NftReceipt.into(),
      &nft_owner, deposit)?;
      T::Currency::hold(&pallet_preimage::HoldReason::Preimage.into(),
      &nft_owner, deposit)?;
      
      T::Currency::hold(&pallet_state_trie_migration::HoldReason::SlashForContinueMigrate.into(),
      &nft_owner, deposit)?;
      
        // With `type MaxHolds = ConstU32<3>` these two will fail
      
      T::Currency::hold(&pallet_state_trie_migration::HoldReason::SlashForMigrateCustomTop.into(),
      &nft_owner, deposit)?;
      
      T::Currency::hold(&pallet_state_trie_migration::HoldReason::SlashForMigrateCustomChild.into(),
      &nft_owner, deposit)?;
        ```  
      
      
      ## Solutions
      
      A macro `#[pallet::*]` expansion is extended of `VariantCount`
      implementation for the `#[pallet::composite_enum]` enum type. This
      expansion generates the `VariantCount` implementation for pallets'
      `HoldReason`, `FreezeReason`, `LockId`, and `SlashReason`. Enum variants
      must be plain enum values without fields to ensure a deterministic
      count.
      
      The composite runtime enum, `RuntimeHoldReason` and
      `RuntimeFreezeReason`, now sets `VariantCount::VARIANT_COUNT` as the sum
      of pallets' enum `VariantCount::VARIANT_COUNT`:
      ```rust
      #[frame_support::pallet(dev_mode)]
      mod module_single_instance {
      
      	#[pallet::composite_enum]
      	pub enum HoldReason {
      		ModuleSingleInstanceReason1,
      		ModuleSingleInstanceReason2,
      	}
      ...
      }
      
      #[frame_support::pallet(dev_mode)]
      mod module_multi_instance {
      
      	#[pallet::composite_enum]
      	pub enum HoldReason<I: 'static = ()> {
      		ModuleMultiInstanceReason1,
      		ModuleMultiInstanceReason2,
      		ModuleMultiInstanceReason3,
      	}
      ...
      }
      
      
      impl self::sp_api_hidden_includes_construct_runtime::hidden_include::traits::VariantCount
          for RuntimeHoldReason
      {
          const VARIANT_COUNT: u32 = 0
              + module_single_instance::HoldReason::VARIANT_COUNT
              + module_multi_instance::HoldReason::<module_multi_instance::Instance1>::VARIANT_COUNT
              + module_multi_instance::HoldReason::<module_multi_instance::Instance2>::VARIANT_COUNT
              + module_multi_instance::HoldReason::<module_multi_instance::Instance3>::VARIANT_COUNT;
      }
      ```
      
      In addition, `MaxHolds` is removed (as suggested
      [here](https://github.com/paritytech/polkadot-sdk/pull/2657#discussion_r1443324573))
      from `pallet_balances`, and its `Holds` are now bounded to
      `RuntimeHoldReason::VARIANT_COUNT`. Therefore, there is no need to let
      the runtime specify `MaxHolds`.
      
      
      ## For reviewers
      
      Relevant changes can be found here:
      - `substrate/frame/support/procedural/src/lib.rs` 
      -  `substrate/frame/support/procedural/src/pallet/parse/composite.rs`
      -  `substrate/frame/support/procedural/src/pallet/expand/composite.rs`
      -
      `substrate/frame/support/procedural/src/construct_runtime/expand/composite_helper.rs`
      -
      `substrate/frame/support/procedural/src/construct_runtime/expand/hold_reason.rs`
      -
      `substrate/frame/support/procedural/src/construct_runtime/expand/freeze_reason.rs`
      - `substrate/frame/support/src/traits/misc.rs`
      
      And the rest of the files is just about removed `MaxHolds` from
      `pallet_balances`
      
      ## Next steps
      
      Do the same for `MaxFreezes`
      https://github.com/paritytech/polkadot-sdk/issues/2997.
      
      ---------
      
      Co-authored-by: command-bot <>
      Co-authored-by: default avatarBastian Köcher <[email protected]>
      Co-authored-by: default avatarDónal Murray <[email protected]>
      Co-authored-by: default avatargupnik <[email protected]>
      bb8ddc46
  8. Jan 26, 2024
  9. Jan 24, 2024
    • Just van Stam's avatar
      Transactional processing for XCM (#1222) · 50eb12cf
      Just van Stam authored
      
      
      Moved from: https://github.com/paritytech/polkadot/pull/6951
      
      closes https://github.com/paritytech/polkadot-sdk/issues/490
      
      - [x] update cumulus
      
      --- 
      This PR introduces transactional processing of certain xcm instructions.
      For the list of instructions checkout
      https://github.com/paritytech/polkadot-sdk/issues/490. The transactional
      processing is implemented as an xcm-executor config item. The two
      implementations in this PR are `FrameTransactionalProcessor` and `()`.
      The `()` implementation does no transactional processing. Each
      implementation of the `ProcessTransaction` trait has an
      `IS_TRANSACTIONAL` const that tells the XCVM if transactional processing
      is actually implemented. If Transactional processing is implemented,
      changes to touched registers should also be rolled back to prevent
      inconsistencies.
      
      
      Note for reviewers:
      Check out the following safety assumption:
      https://github.com/paritytech/polkadot-sdk/pull/1222/files#diff-4effad7d8c1c9de19fd27e18661cbf2128c8718f3b2420a27d2f816e0749ea53R30
      
      ---------
      
      Co-authored-by: default avatarKeith Yeung <[email protected]>
      Co-authored-by: default avatarFrancisco Aguirre <[email protected]>
      Co-authored-by: command-bot <>
      50eb12cf
  10. Jan 23, 2024
    • Niklas Adolfsson's avatar
      rpc: backpressured RPC server (bump jsonrpsee 0.20) (#1313) · e16ef086
      Niklas Adolfsson authored
      This is a rather big change in jsonrpsee, the major things in this bump
      are:
      - Server backpressure (the subscription impls are modified to deal with
      that)
      - Allow custom error types / return types (remove jsonrpsee::core::Error
      and jsonrpee::core::CallError)
      - Bug fixes (graceful shutdown in particular not used by substrate
      anyway)
         - Less dependencies for the clients in particular
         - Return type requires Clone in method call responses
         - Moved to tokio channels
         - Async subscription API (not used in this PR)
      
      Major changes in this PR:
      - The subscriptions are now bounded and if subscription can't keep up
      with the server it is dropped
      - CLI: add parameter to configure the jsonrpc server bounded message
      buffer (default is 64)
      - Add our own subscription helper to deal with the unbounded streams in
      substrate
      
      The most important things in this PR to review is the added helpers
      functions in `substrate/client/rpc/src/utils.rs` and the rest is pretty
      much chore.
      
      Regarding the "bounded buffer limit" it may cause the server to handle
      the JSON-RPC calls
      slower than before.
      
      The message size limit is bounded by "--rpc-response-size" thus "by
      default 10MB * 64 = 640MB"
      but the subscription message size is not covered by this limit and could
      be capped as well.
      
      Hopefully the last release prior to 1.0, sorry in advance for a big PR
      
      Previous attempt: https://github.com/paritytech/substrate/pull/13992
      
      Resolves https://github.com/paritytech/polkadot-sdk/issues/748, resolves
      https://github.com/paritytech/polkadot-sdk/issues/627
      e16ef086
  11. Jan 22, 2024
  12. Jan 18, 2024
  13. Jan 16, 2024
    • Francisco Aguirre's avatar
      XCMv4 (#1230) · 8428f678
      Francisco Aguirre authored
      
      
      # Note for reviewer
      
      Most changes are just syntax changes necessary for the new version.
      Most important files should be the ones under the `xcm` folder.
      
      # Description 
      
      Added XCMv4.
      
      ## Removed `Multi` prefix
      The following types have been renamed:
      - MultiLocation -> Location
      - MultiAsset -> Asset
      - MultiAssets -> Assets
      - InteriorMultiLocation -> InteriorLocation
      - MultiAssetFilter -> AssetFilter
      - VersionedMultiAsset -> VersionedAsset
      - WildMultiAsset -> WildAsset
      - VersionedMultiLocation -> VersionedLocation
      
      In order to fix a name conflict, the `Assets` in `xcm-executor` were
      renamed to `HoldingAssets`, as they represent assets in holding.
      
      ## Removed `Abstract` asset id
      
      It was not being used anywhere and this simplifies the code.
      
      Now assets are just constructed as follows:
      
      ```rust
      let asset: Asset = (AssetId(Location::new(1, Here)), 100u128).into();
      ```
      
      No need for specifying `Concrete` anymore.
      
      ## Outcome is now a named fields struct
      
      Instead of
      
      ```rust
      pub enum Outcome {
        Complete(Weight),
        Incomplete(Weight, Error),
        Error(Error),
      }
      ```
      
      we now have
      
      ```rust
      pub enum Outcome {
        Complete { used: Weight },
        Incomplete { used: Weight, error: Error },
        Error { error: Error },
      }
      ```
      
      ## Added Reanchorable trait
      
      Now both locations and assets implement this trait, making it easier to
      reanchor both.
      
      ## New syntax for building locations and junctions
      
      Now junctions are built using the following methods:
      
      ```rust
      let location = Location {
          parents: 1,
          interior: [Parachain(1000), PalletInstance(50), GeneralIndex(1984)].into()
      };
      ```
      
      or
      
      ```rust
      let location = Location::new(1, [Parachain(1000), PalletInstance(50), GeneralIndex(1984)]);
      ```
      
      And they are matched like so:
      
      ```rust
      match location.unpack() {
        (1, [Parachain(id)]) => ...
        (0, Here) => ...,
        (1, [_]) => ...,
      }
      ```
      
      This syntax is mandatory in v4, and has been also implemented for v2 and
      v3 for easier migration.
      
      This was needed to make all sizes smaller.
      
      # TODO
      - [x] Scaffold v4
      - [x] Port github.com/paritytech/polkadot/pull/7236
      - [x] Remove `Multi` prefix
      - [x] Remove `Abstract` asset id
      
      ---------
      
      Co-authored-by: command-bot <>
      Co-authored-by: default avatarKeith Yeung <[email protected]>
      8428f678
  14. Dec 26, 2023
  15. Dec 18, 2023
  16. Dec 14, 2023
    • Francisco Aguirre's avatar
      Add FungibleAdapter (#2684) · 10a91f82
      Francisco Aguirre authored
      In the move from the old `Currency` traits to the new `fungible/s`
      family of traits, we already had the `FungiblesAdapter` and
      `NonFungiblesAdapter` for multiple fungible and non fungible assets
      respectively. However, for handling only one fungible asset, we were
      missing a `FungibleAdapter`, and so used the old `CurrencyAdapter`
      instead. This PR aims to fill in that gap, and provide the new adapter
      for more updated examples.
      
      I marked the old `CurrencyAdapter` as deprecated as part of this PR, and
      I'll change it to the new `FungibleAdapter` in a following PR.
      The two stages are separated so as to not bloat this PR with some name
      fixes in tests.
      
      ---------
      
      Co-authored-by: command-bot <>
      10a91f82
  17. Dec 13, 2023
  18. Dec 12, 2023
    • Branislav Kontur's avatar
      Ensure xcm versions over bridge (on sending chains) (#2481) · 575b8f8d
      Branislav Kontur authored
      ## Summary
      
      This pull request proposes a solution for improved control of the
      versioned XCM flow over the bridge (across different consensus chains)
      and resolves the situation where the sending chain/consensus has already
      migrated to a higher XCM version than the receiving chain/consensus.
      
      ## Problem/Motivation
      
      The current flow over the bridge involves a transfer from AssetHubRococo
      (AHR) to BridgeHubRococo (BHR) to BridgeHubWestend (BHW) and finally to
      AssetHubWestend (AHW), beginning with a reserve-backed transfer on AHR.
      
      In this process:
      1. AHR sends XCM `ExportMessage` through `XcmpQueue`, incorporating XCM
      version checks using the `WrapVersion` feature, influenced by
      `pallet_xcm::SupportedVersion` (managed by
      `pallet_xcm::force_xcm_version` or version discovery).
      
      2. BHR handles the `ExportMessage` instruction, utilizing the latest XCM
      version. The `HaulBlobExporter` converts the inner XCM to
      [`VersionedXcm::from`](https://github.com/paritytech/polkadot-sdk/blob/63ac2471/polkadot/xcm/xcm-builder/src/universal_exports.rs#L465-L467),
      also using the latest XCM version.
      
      However, challenges arise:
      - Incompatibility when BHW uses a different version than BHR. For
      instance, if BHR migrates to **XCMv4** while BHW remains on **XCMv3**,
      BHR's `VersionedXcm::from` uses `VersionedXcm::V4` variant, causing
      encoding issues for BHW.
        ```
      	/// Just a simulation of possible error, which could happen on BHW
      	/// (this code is based on actual master without XCMv4)
      	let encoded = hex_literal::hex!("0400");
      	println!("{:?}", VersionedXcm::<()>::decode(&mut &encoded[..]));
      
      Err(Error { cause: None, desc: "Could not decode `VersionedXcm`, variant
      doesn't exist" })
        ``` 
      - Similar compatibility issues exist between AHR and AHW.
      
      ## Solution
      
      This pull request introduces the following solutions:
      
      1. **New trait `CheckVersion`** - added to the `xcm` module and exposing
      `pallet_xcm::SupportedVersion`. This enhancement allows checking the
      actual XCM version for desired destinations outside of the `pallet_xcm`
      module.
      
      2. **Version Check in `HaulBlobExporter`** uses `CheckVersion` to check
      known/configured destination versions, ensuring compatibility. For
      example, in the scenario mentioned, BHR can store the version `3` for
      BHW. If BHR is on XCMv4, it will attempt to downgrade the message to
      version `3` instead of using the latest version `4`.
      
      3. **Version Check in `pallet-xcm-bridge-hub-router`** - this check
      ensures compatibility with the real destination's XCM version,
      preventing the unnecessary sending of messages to the local bridge hub
      if versions are incompatible.
      
      These additions aim to improve the control and compatibility of XCM
      flows over the bridge and addressing issues related to version
      mismatches.
      
      ## Possible alternative solution
      
      _(More investigation is needed, and at the very least, it should extend
      to XCMv4/5. If this proves to be a viable option, I can open an RFC for
      XCM.)._
      
      Add the `XcmVersion` attribute to the `ExportMessage` so that the
      sending chain can determine, based on what is stored in
      `pallet_xcm::SupportedVersion`, the version the destination is using.
      This way, we may not need to handle the version in `HaulBlobExporter`.
      
      ```
      ExportMessage {
      	network: NetworkId,
      	destination: InteriorMultiLocation,
      	xcm: Xcm<()>
      	destination_xcm_version: Version, // <- new attritbute
      },
      ```
      
      ```
      pub trait ExportXcm {
              fn validate(
      		network: NetworkId,
      		channel: u32,
      		universal_source: &mut Option<InteriorMultiLocation>,
      		destination: &mut Option<InteriorMultiLocation>,
      		message: &mut Option<Xcm<()>>,
                      destination_xcm_version: Version, , // <- new attritbute
      	) -> SendResult<Self::Ticket>;
      ```
      
      ## Future Directions
      
      This PR does not fix version discovery over bridge, further
      investigation will be conducted here:
      https://github.com/paritytech/polkadot-sdk/issues/2417.
      
      ## TODO
      
      - [x] `pallet_xcm` mock for tests uses hard-coded XCM version `2` -
      change to 3 or lastest?
      - [x] fix `pallet-xcm-bridge-hub-router`
      - [x] fix HaulBlobExporter with version determination
      [here](https://github.com/paritytech/polkadot-sdk/blob/2183669d/polkadot/xcm/xcm-builder/src/universal_exports.rs#L465)
      - [x] add unit-tests to the runtimes
      - [x] run benchmarks for `ExportMessage`
      - [x] extend local run scripts about `force_xcm_version(dest, version)`
      - [ ] when merged, prepare governance calls for Rococo/Westend
      - [ ] add PRDoc
      
      Part of: https://github.com/paritytech/parity-bridges-common/issues/2719
      
      ---------
      
      Co-authored-by: command-bot <>
      575b8f8d
  19. Dec 01, 2023
  20. Nov 28, 2023
  21. Nov 15, 2023
    • Adrian Catangiu's avatar
      xcm: SovereignPaidRemoteExporter: remove unused RefundSurplus instruction (#2312) · 824b7823
      Adrian Catangiu authored
      Refunding surplus happens anyway on xcm_executor::post_process(),
      automatically refunding surplus to original_origin at the end of
      execution. Since SovereignPaidRemoteExporter doesn't ClearOrigin, it can
      simply rely on the automatic mechanism.
      
      Furthermore, RefundSurplus instruction refunds _surplus_. Surplus exists
      only as a result of Transact, SetErrorHandler or SetAppendix
      instructions, none of which being part of the
      SovereignPaidRemoteExporter XCM program. So surplus is always zero here
      anyway.
      824b7823
  22. Nov 14, 2023
  23. Nov 13, 2023
    • Adrian Catangiu's avatar
      pallet-xcm: enhance `reserve_transfer_assets` to support remote reserves (#1672) · 18257373
      Adrian Catangiu authored
      
      
      ## Motivation
      
      `pallet-xcm` is the main user-facing interface for XCM functionality,
      including assets manipulation functions like `teleportAssets()` and
      `reserve_transfer_assets()` calls.
      
      While `teleportAsset()` works both ways, `reserve_transfer_assets()`
      works only for sending reserve-based assets to a remote destination and
      beneficiary when the reserve is the _local chain_.
      
      ## Solution
      
      This PR enhances `pallet_xcm::(limited_)reserve_withdraw_assets` to
      support transfers when reserves are other chains.
      This will allow complete, **bi-directional** reserve-based asset
      transfers user stories using `pallet-xcm`.
      
      Enables following scenarios:
      - transferring assets with local reserve (was previously supported iff
      asset used as fee also had local reserve - now it works in all cases),
      - transferring assets with reserve on destination,
      - transferring assets with reserve on remote/third-party chain (iff
      assets and fees have same remote reserve),
      - transferring assets with reserve different than the reserve of the
      asset to be used as fees - meaning can be used to transfer random asset
      with local/dest reserve while using DOT for fees on all involved chains,
      even if DOT local/dest reserve doesn't match asset reserve,
      - transferring assets with any type of local/dest reserve while using
      fees which can be teleported between involved chains.
      
      All of the above is done by pallet inner logic without the user having
      to specify which scenario/reserves/teleports/etc. The correct scenario
      and corresponding XCM programs are identified, and respectively, built
      automatically based on runtime configuration of trusted teleporters and
      trusted reserves.
      
      #### Current limitations:
      - while `fees` and "non-fee" `assets` CAN have different reserves (or
      fees CAN be teleported), the remaining "non-fee" `assets` CANNOT, among
      themselves, have different reserve locations (this is also implicitly
      enforced by `MAX_ASSETS_FOR_TRANSFER=2`, but this can be safely
      increased in the future).
      - `fees` and "non-fee" `assets` CANNOT have **different remote**
      reserves (this could also be supported in the future, but adds even more
      complexity while possibly not being worth it - we'll see what the future
      holds).
      
      Fixes https://github.com/paritytech/polkadot-sdk/issues/1584
      Fixes https://github.com/paritytech/polkadot-sdk/issues/2055
      
      ---------
      
      Co-authored-by: default avatarFrancisco Aguirre <[email protected]>
      Co-authored-by: default avatarBranislav Kontur <[email protected]>
      18257373
  24. Nov 10, 2023
    • PG Herveou's avatar
      Contracts: Add XCM traits to interface with contracts (#2086) · 6b7be115
      PG Herveou authored
      
      
      We are introducing a new set of `XcmController` traits (final name yet
      to be determined).
      These traits are implemented by `pallet-xcm` and allows other pallets,
      such as `pallet_contracts`, to rely on these traits instead of tight
      coupling them to `pallet-xcm`.
      
      Using only the existing Xcm traits would mean duplicating the logic from
      `pallet-xcm` in these other pallets, which we aim to avoid. Our
      objective is to ensure that when these APIs are called from
      `pallet-contracts`, they produce the exact same outcomes as if called
      directly from `pallet-xcm`.
      
      The other benefits is that we can also expose return values to
      `pallet-contracts` instead of just calling `pallet-xcm` dispatchable and
      getting a `DispatchResult` back.
      
      See traits integration in this PR
      https://github.com/paritytech/polkadot-sdk/pull/1248, where the traits
      are used as follow to define and implement `pallet-contracts` Config.
      ```rs
      // Contracts config:
      pub trait Config: frame_system::Config {
        // ...
      
        /// A type that exposes XCM APIs, allowing contracts to interact with other parachains, and
        /// execute XCM programs.
        type Xcm: xcm_executor::traits::Controller<
      	  OriginFor<Self>,
      	  <Self as frame_system::Config>::RuntimeCall,
      	  BlockNumberFor<Self>,
        >;
      }
      
      // implementation
      impl pallet_contracts::Config for Runtime {
              // ...
      
      	type Xcm = pallet_xcm::Pallet<Self>;
      }
      ```
      
      ---------
      
      Co-authored-by: default avatarAlexander Theißen <[email protected]>
      Co-authored-by: command-bot <>
      6b7be115
  25. Nov 09, 2023
  26. Nov 02, 2023
    • Oliver Tale-Yazdi's avatar
      Use `Message Queue` as DMP and XCMP dispatch queue (#1246) · e1c033eb
      Oliver Tale-Yazdi authored
      
      
      (imported from https://github.com/paritytech/cumulus/pull/2157)
      
      ## Changes
      
      This MR refactores the XCMP, Parachains System and DMP pallets to use
      the [MessageQueue](https://github.com/paritytech/substrate/pull/12485)
      for delayed execution of incoming messages. The DMP pallet is entirely
      replaced by the MQ and thereby removed. This allows for PoV-bounded
      execution and resolves a number of issues that stem from the current
      work-around.
      
      All System Parachains adopt this change.  
      The most important changes are in `primitives/core/src/lib.rs`,
      `parachains/common/src/process_xcm_message.rs`,
      `pallets/parachain-system/src/lib.rs`, `pallets/xcmp-queue/src/lib.rs`
      and the runtime configs.
      
      ### DMP Queue Pallet
      
      The pallet got removed and its logic refactored into parachain-system.
      Overweight message management can be done directly through the MQ
      pallet.
      
      Final undeployment migrations are provided by
      `cumulus_pallet_dmp_queue::UndeployDmpQueue` and `DeleteDmpQueue` that
      can be configured with an aux config trait like:
      
      ```rust
      parameter_types! {
      	pub const DmpQueuePalletName: &'static str = \"DmpQueue\" < CHANGE ME;
      	pub const RelayOrigin: AggregateMessageOrigin = AggregateMessageOrigin::Parent;
      }
      
      impl cumulus_pallet_dmp_queue::MigrationConfig for Runtime {
      	type PalletName = DmpQueuePalletName;
      	type DmpHandler = frame_support::traits::EnqueueWithOrigin<MessageQueue, RelayOrigin>;
      	type DbWeight = <Runtime as frame_system::Config>::DbWeight;
      }
      
      // And adding them to your Migrations tuple:
      pub type Migrations = (
      	...
      	cumulus_pallet_dmp_queue::UndeployDmpQueue<Runtime>,
      	cumulus_pallet_dmp_queue::DeleteDmpQueue<Runtime>,
      );
      ```
      
      ### XCMP Queue pallet
      
      Removed all dispatch queue functionality. Incoming XCMP messages are now
      either: Immediately handled if they are Signals, enqueued into the MQ
      pallet otherwise.
      
      New config items for the XCMP queue pallet:
      ```rust
      /// The actual queue implementation that retains the messages for later processing.
      type XcmpQueue: EnqueueMessage<ParaId>;
      
      /// How a XCM over HRMP from a sibling parachain should be processed.
      type XcmpProcessor: ProcessMessage<Origin = ParaId>;
      
      /// The maximal number of suspended XCMP channels at the same time.
      #[pallet::constant]
      type MaxInboundSuspended: Get<u32>;
      ```
      
      How to configure those:
      
      ```rust
      // Use the MessageQueue pallet to store messages for later processing. The `TransformOrigin` is needed since
      // the MQ pallet itself operators on `AggregateMessageOrigin` but we want to enqueue `ParaId`s.
      type XcmpQueue = TransformOrigin<MessageQueue, AggregateMessageOrigin, ParaId, ParaIdToSibling>;
      
      // Process XCMP messages from siblings. This is type-safe to only accept `ParaId`s. They will be dispatched
      // with origin `Junction::Sibling(…)`.
      type XcmpProcessor = ProcessFromSibling<
      	ProcessXcmMessage<
      		AggregateMessageOrigin,
      		xcm_executor::XcmExecutor<xcm_config::XcmConfig>,
      		RuntimeCall,
      	>,
      >;
      
      // Not really important what to choose here. Just something larger than the maximal number of channels.
      type MaxInboundSuspended = sp_core::ConstU32<1_000>;
      ```
      
      The `InboundXcmpStatus` storage item was replaced by
      `InboundXcmpSuspended` since it now only tracks inbound queue suspension
      and no message indices anymore.
      
      Now only sends the most recent channel `Signals`, as all prio ones are
      out-dated anyway.
      
      ### Parachain System pallet
      
      For `DMP` messages instead of forwarding them to the `DMP` pallet, it
      now pushes them to the configured `DmpQueue`. The message processing
      which was triggered in `set_validation_data` is now being done by the MQ
      pallet `on_initialize`.
      
      XCMP messages are still handed off to the `XcmpMessageHandler`
      (XCMP-Queue pallet) - no change here.
      
      New config items for the parachain system pallet:
      ```rust
      /// Queues inbound downward messages for delayed processing. 
      ///
      /// Analogous to the `XcmpQueue` of the XCMP queue pallet.
      type DmpQueue: EnqueueMessage<AggregateMessageOrigin>;
      ``` 
      
      How to configure:
      ```rust
      /// Use the MQ pallet to store DMP messages for delayed processing.
      type DmpQueue = MessageQueue;
      ``` 
      
      ## Message Flow
      
      The flow of messages on the parachain side. Messages come in from the
      left via the `Validation Data` and finally end up at the `Xcm Executor`
      on the right.
      
      ![Untitled
      (1)](https://github.com/paritytech/cumulus/assets/10380170/6cf8b377-88c9-4aed-96df-baace266e04d)
      
      ## Further changes
      
      - Bumped the default suspension, drop and resume thresholds in
      `QueueConfigData::default()`.
      - `XcmpQueue::{suspend_xcm_execution, resume_xcm_execution}` errors when
      they would be a noop.
      - Properly validate the `QueueConfigData` before setting it.
      - Marked weight files as auto-generated so they wont auto-expand in the
      MR files view.
      - Move the `hypothetical` asserts to `frame_support` under the name
      `experimental_hypothetically`
      
      Questions:
      - [ ] What about the ugly `#[cfg(feature = \"runtime-benchmarks\")]` in
      the runtimes? Not sure how to best fix. Just having them like this makes
      tests fail that rely on the real message processor when the feature is
      enabled.
      - [ ] Need a good weight for `MessageQueueServiceWeight`. The scheduler
      already takes 80% so I put it to 10% but that is quite low.
      
      TODO:
      - [x] Remove c&p code after
      https://github.com/paritytech/polkadot/pull/6271
      - [x] Use `HandleMessage` once it is public in Substrate
      - [x] fix `runtime-benchmarks` feature
      https://github.com/paritytech/polkadot/pull/6966
      - [x] Benchmarks
      - [x] Tests
      - [ ] Migrate `InboundXcmpStatus` to `InboundXcmpSuspended`
      - [x] Possibly cleanup Migrations (DMP+XCMP)
      - [x] optional: create `TransformProcessMessageOrigin` in Substrate and
      replace `ProcessFromSibling`
      - [ ] Rerun weights on ref HW
      
      ---------
      
      Signed-off-by: default avatarOliver Tale-Yazdi <[email protected]>
      Co-authored-by: default avatarLiam Aharon <[email protected]>
      Co-authored-by: default avatarjoe petrowski <[email protected]>
      Co-authored-by: default avatarKian Paimani <[email protected]>
      Co-authored-by: command-bot <>
      e1c033eb
  27. Nov 01, 2023
  28. Oct 24, 2023
    • Kian Paimani's avatar
      Ensure correct variant count in `Runtime[Hold/Freeze]Reason` (#1900) · 35eb133b
      Kian Paimani authored
      
      
      closes https://github.com/paritytech/polkadot-sdk/issues/1882
      
      ## Breaking Changes
      
      This PR introduces a new item to `pallet_balances::Config`:
      
      ```diff
      trait Config {
      ++    type RuntimeFreezeReasons;
      }
      ```
      
      This value is only used to check it against `type MaxFreeze`. A similar
      check has been added for `MaxHolds` against `RuntimeHoldReasons`, which
      is already given to `pallet_balances`.
      
      In all contexts, you should pass the real `RuntimeFreezeReasons`
      generated by `construct_runtime` to `type RuntimeFreezeReasons`. Passing
      `()` would also work, but it would imply that the runtime uses no
      freezes at all.
      
      ---------
      
      Signed-off-by: default avatarOliver Tale-Yazdi <[email protected]>
      Co-authored-by: default avatarOliver Tale-Yazdi <[email protected]>
      35eb133b
  29. Oct 20, 2023
    • Bastian Köcher's avatar
      `xcm`: Change `TypeInfo::path` to not include `staging` (#1948) · f3bf5c1a
      Bastian Köcher authored
      
      
      The `xcm` crate was renamed to `staging-xcm` to be able to publish it to
      crates.io as someone as squatted `xcm`. The problem with this rename is
      that the `TypeInfo` includes the crate name which ultimately lands in
      the metadata. The metadata is consumed by downstream users like
      `polkadot-js` or people building on top of `polkadot-js`. These people
      are using the entire `path` to find the type in the type registry. Thus,
      their code would break as the type path would now be [`staging_xcm`,
      `VersionedXcm`] instead of [`xcm`, `VersionedXcm`]. This pull request
      fixes this by renaming the path segment `staging_xcm` to `xcm`.
      
      This requires: https://github.com/paritytech/scale-info/pull/197
      
      ---------
      
      Co-authored-by: default avatarFrancisco Aguirre <[email protected]>
      f3bf5c1a
  30. Oct 18, 2023
    • Keith Yeung's avatar
      Introduce XcmFeesToAccount fee manager (#1234) · 3dece311
      Keith Yeung authored
      
      
      Combination of paritytech/polkadot#7005, its addon PR
      paritytech/polkadot#7585 and its companion paritytech/cumulus#2433.
      
      This PR introduces a new XcmFeesToAccount struct which implements the
      `FeeManager` trait, and assigns this struct as the `FeeManager` in the
      XCM config for all runtimes.
      
      The struct simply deposits all fees handled by the XCM executor to a
      specified account. In all runtimes, the specified account is configured
      as the treasury account.
      
      XCM __delivery__ fees are now being introduced (unless the root origin
      is sending a message to a system parachain on behalf of the originating
      chain).
      
      # Note for reviewers
      
      Most file changes are tests that had to be modified to account for the
      new fees.
      Main changes are in:
      - cumulus/pallets/xcmp-queue/src/lib.rs <- To make it track the delivery
      fees exponential factor
      - polkadot/xcm/xcm-builder/src/fee_handling.rs <- Added. Has the
      FeeManager implementation
      - All runtime xcm_config files <- To add the FeeManager to the XCM
      configuration
      
      # Important note
      
      After this change, instructions that create and send a new XCM (Query*,
      Report*, ExportMessage, InitiateReserveWithdraw, InitiateTeleport,
      DepositReserveAsset, TransferReserveAsset, LockAsset and RequestUnlock)
      will require the corresponding origin account in the origin register to
      pay for transport delivery fees, and the onward message will fail to be
      sent if the origin account does not have the required amount. This
      delivery fee is on top of what we already collect as tx fees in
      pallet-xcm and XCM BuyExecution fees!
      
      Wallet UIs that want to expose the new delivery fee can do so using the
      formula:
      
      ```
      delivery_fee_factor * (base_fee + encoded_msg_len * per_byte_fee)
      ```
      
      where the delivery fee factor can be obtained from the corresponding
      pallet based on which transport you are using (UMP, HRMP or bridges),
      the base fee is a constant, the encoded message length from the message
      itself and the per byte fee is the same as the configured per byte fee
      for txs (i.e. `TransactionByteFee`).
      
      ---------
      
      Co-authored-by: default avatarBranislav Kontur <[email protected]>
      Co-authored-by: default avatarjoe petrowski <[email protected]>
      Co-authored-by: default avatarGiles Cope <[email protected]>
      Co-authored-by: command-bot <>
      Co-authored-by: default avatarFrancisco Aguirre <[email protected]>
      Co-authored-by: default avatarLiam Aharon <[email protected]>
      Co-authored-by: default avatarKian Paimani <[email protected]>
      3dece311
  31. Oct 17, 2023
    • Xiliang Chen's avatar
      increase MAX_ASSETS_FOR_BUY_EXECUTION (#1733) · 38c0604b
      Xiliang Chen authored
      
      
      Partially addresses #1638
      
      Still need a better solution to allow devs to have better control of
      this.
      
      ---------
      
      Co-authored-by: default avatarKeith Yeung <[email protected]>
      Co-authored-by: default avatarjoe petrowski <[email protected]>
      38c0604b
    • Squirrel's avatar
      nit: use traits::tokens::fungible => use traits::fungible (#1753) · d9e266f4
      Squirrel authored
      
      
      Slightly less verbose use of fungible(s).
      
      ---------
      
      Co-authored-by: default avatarLiam Aharon <[email protected]>
      d9e266f4
    • Branislav Kontur's avatar
      [xcm] Small enhancements for `NetworkExportTable` and `xcm-builder` (#1848) · 5cdd819e
      Branislav Kontur authored
      
      
      ## Summary
      
      This PR introduces several enhancements.
      
      The current implementation of `NetworkExportTable` lacks remote location
      filtering support beyond `NetworkId` lookup. To provide more control and
      granularity, it's essential to allow configuration for bridging to
      different consensus `NetworkId` while restricting access e.g. to
      particular remote parachains.
      
      Additionally, the `StartsWith` and `Equals` and
      `StartsWithExplicitGlobalConsensus` helper functions, which are in
      active use, are moved to the `xcm-builder` and `frame_support` modules
      for better code organization.
      
      Adds a new `LocationWithAssetFilters` filter to enable location-based
      and asset-related filtering. This filter is useful for configuring the
      `pallet_xcm` filter for
      [XcmTeleportFilter](https://github.com/paritytech/polkadot-sdk/blob/master/polkadot/xcm/pallet-xcm/src/lib.rs#L212)
      and
      [XcmReserveTransferFilter](https://github.com/paritytech/polkadot-sdk/blob/master/polkadot/xcm/pallet-xcm/src/lib.rs#L216)
      to restrict specific assets.
      
      Furthermore, the `BridgeMessage` fields are not accessible outside of
      `xcm-builder`, limiting the ability to create custom logic dependent on
      it.
      
      ---------
      
      Co-authored-by: default avatarFrancisco Aguirre <[email protected]>
      5cdd819e
  32. Oct 12, 2023
  33. Oct 01, 2023
  34. Sep 20, 2023
    • joe petrowski's avatar
      Disable Calls to Identity Pallet (#1476) · 771c3fbd
      joe petrowski authored
      This PR filters calls from the Identity pallet from all Relay Chain
      runtimes as preparation to move the identity state and logic to a system
      parachain within each network.
      
      After this change is deployed to a runtime, no more changes such as
      adding new sub-identities will be possible. The frozen state will be
      part of the genesis state of the system chain. After the system chain
      launches, the pallet and all state will be removed from each Relay
      Chain.
      
      Applications and UIs that render display information from this pallet
      will need to read from the system chain when it launches.
      771c3fbd
  35. Sep 19, 2023
    • Xiliang Chen's avatar
      allow governance body on parachain to have sovereign account (#1291) · cdbdbc75
      Xiliang Chen authored
      The goal is to allow Fellowship on Collective chain to have a sovereign
      account on Polkadot so that we can add it as an identity registrar. This
      will allow Fellows origin to be able to provide judgements for
      Fellowship members.
      
      This currently allow any body on any parachain including non system
      parachains to have sovereign account. I cannot think of any reason why
      that may be an issue but let me know if I should change it to filter
      only system parachains.
      
      [This](https://gist.github.com/xlc/ec61bfa4e9f6d62da27d30141ad2c72b) is
      the testing script.
      
      Original PR: https://github.com/paritytech/polkadot/pull/7518
      cdbdbc75