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 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2026-04-26 15:47:58 +00:00 · 2024-03-04 20:12:43 +01:00
parent b0741d4f78
commit fd5f9292f5
349 changed files with 25581 additions and 17082 deletions
@@ -2573,7 +2573,8 @@ pub(crate) mod tests {
 	use sp_blockchain::{lowest_common_ancestor, tree_route};
 	use sp_core::H256;
 	use sp_runtime::{
-		testing::{Block as RawBlock, ExtrinsicWrapper, Header},
+		generic::UncheckedExtrinsic,
+		testing::{Block as RawBlock, Header, MockCallU64},
 		traits::{BlakeTwo256, Hash},
 		ConsensusEngineId, StateVersion,
 	};
@@ -2581,7 +2582,8 @@ pub(crate) mod tests {
 	const CONS0_ENGINE_ID: ConsensusEngineId = *b"CON0";
 	const CONS1_ENGINE_ID: ConsensusEngineId = *b"CON1";

-	pub(crate) type Block = RawBlock<ExtrinsicWrapper<u64>>;
+	type UncheckedXt = UncheckedExtrinsic<u64, MockCallU64, (), ()>;
+	pub(crate) type Block = RawBlock<UncheckedXt>;

 	pub fn insert_header(
 		backend: &Backend<Block>,
@@ -2600,7 +2602,7 @@ pub(crate) mod tests {
 		parent_hash: H256,
 		_changes: Option<Vec<(Vec<u8>, Vec<u8>)>>,
 		extrinsics_root: H256,
-		body: Vec<ExtrinsicWrapper<u64>>,
+		body: Vec<UncheckedXt>,
 		transaction_index: Option<Vec<IndexOperation>>,
 	) -> Result<H256, sp_blockchain::Error> {
 		use sp_runtime::testing::Digest;
@@ -3414,7 +3416,7 @@ pub(crate) mod tests {
 					prev_hash,
 					None,
 					Default::default(),
-					vec![i.into()],
+					vec![UncheckedXt::new_transaction(i.into(), ())],
 					None,
 				)
 				.unwrap();
@@ -3436,11 +3438,20 @@ pub(crate) mod tests {
 				assert_eq!(None, bc.body(blocks[0]).unwrap());
 				assert_eq!(None, bc.body(blocks[1]).unwrap());
 				assert_eq!(None, bc.body(blocks[2]).unwrap());
-				assert_eq!(Some(vec![3.into()]), bc.body(blocks[3]).unwrap());
-				assert_eq!(Some(vec![4.into()]), bc.body(blocks[4]).unwrap());
+				assert_eq!(
+					Some(vec![UncheckedXt::new_transaction(3.into(), ())]),
+					bc.body(blocks[3]).unwrap()
+				);
+				assert_eq!(
+					Some(vec![UncheckedXt::new_transaction(4.into(), ())]),
+					bc.body(blocks[4]).unwrap()
+				);
 			} else {
 				for i in 0..5 {
-					assert_eq!(Some(vec![(i as u64).into()]), bc.body(blocks[i]).unwrap());
+					assert_eq!(
+						Some(vec![UncheckedXt::new_transaction((i as u64).into(), ())]),
+						bc.body(blocks[i]).unwrap()
+					);
 				}
 			}
 		}
@@ -3464,7 +3475,7 @@ pub(crate) mod tests {
 					prev_hash,
 					None,
 					Default::default(),
-					vec![i.into()],
+					vec![UncheckedXt::new_transaction(i.into(), ())],
 					None,
 				)
 				.unwrap();
@@ -3473,16 +3484,26 @@ pub(crate) mod tests {
 			}

 			// insert a fork at block 2
-			let fork_hash_root =
-				insert_block(&backend, 2, blocks[1], None, H256::random(), vec![2.into()], None)
-					.unwrap();
+			let fork_hash_root = insert_block(
+				&backend,
+				2,
+				blocks[1],
+				None,
+				H256::random(),
+				vec![UncheckedXt::new_transaction(2.into(), ())],
+				None,
+			)
+			.unwrap();
 			insert_block(
 				&backend,
 				3,
 				fork_hash_root,
 				None,
 				H256::random(),
-				vec![3.into(), 11.into()],
+				vec![
+					UncheckedXt::new_transaction(3.into(), ()),
+					UncheckedXt::new_transaction(11.into(), ()),
+				],
 				None,
 			)
 			.unwrap();
@@ -3492,7 +3513,10 @@ pub(crate) mod tests {
 			backend.commit_operation(op).unwrap();

 			let bc = backend.blockchain();
-			assert_eq!(Some(vec![2.into()]), bc.body(fork_hash_root).unwrap());
+			assert_eq!(
+				Some(vec![UncheckedXt::new_transaction(2.into(), ())]),
+				bc.body(fork_hash_root).unwrap()
+			);

 			for i in 1..5 {
 				let mut op = backend.begin_operation().unwrap();
@@ -3506,16 +3530,28 @@ pub(crate) mod tests {
 				assert_eq!(None, bc.body(blocks[1]).unwrap());
 				assert_eq!(None, bc.body(blocks[2]).unwrap());

-				assert_eq!(Some(vec![3.into()]), bc.body(blocks[3]).unwrap());
-				assert_eq!(Some(vec![4.into()]), bc.body(blocks[4]).unwrap());
+				assert_eq!(
+					Some(vec![UncheckedXt::new_transaction(3.into(), ())]),
+					bc.body(blocks[3]).unwrap()
+				);
+				assert_eq!(
+					Some(vec![UncheckedXt::new_transaction(4.into(), ())]),
+					bc.body(blocks[4]).unwrap()
+				);
 			} else {
 				for i in 0..5 {
-					assert_eq!(Some(vec![(i as u64).into()]), bc.body(blocks[i]).unwrap());
+					assert_eq!(
+						Some(vec![UncheckedXt::new_transaction((i as u64).into(), ())]),
+						bc.body(blocks[i]).unwrap()
+					);
 				}
 			}

 			if matches!(pruning, BlocksPruning::KeepAll) {
-				assert_eq!(Some(vec![2.into()]), bc.body(fork_hash_root).unwrap());
+				assert_eq!(
+					Some(vec![UncheckedXt::new_transaction(2.into(), ())]),
+					bc.body(fork_hash_root).unwrap()
+				);
 			} else {
 				assert_eq!(None, bc.body(fork_hash_root).unwrap());
 			}
@@ -3536,8 +3572,16 @@ pub(crate) mod tests {
 		let backend = Backend::<Block>::new_test_with_tx_storage(BlocksPruning::Some(10), 10);

 		let make_block = |index, parent, val: u64| {
-			insert_block(&backend, index, parent, None, H256::random(), vec![val.into()], None)
-				.unwrap()
+			insert_block(
+				&backend,
+				index,
+				parent,
+				None,
+				H256::random(),
+				vec![UncheckedXt::new_transaction(val.into(), ())],
+				None,
+			)
+			.unwrap()
 		};

 		let block_0 = make_block(0, Default::default(), 0x00);
@@ -3565,18 +3609,30 @@ pub(crate) mod tests {
 		let bc = backend.blockchain();
 		assert_eq!(None, bc.body(block_1b).unwrap());
 		assert_eq!(None, bc.body(block_2b).unwrap());
-		assert_eq!(Some(vec![0x00.into()]), bc.body(block_0).unwrap());
-		assert_eq!(Some(vec![0x1a.into()]), bc.body(block_1a).unwrap());
-		assert_eq!(Some(vec![0x2a.into()]), bc.body(block_2a).unwrap());
-		assert_eq!(Some(vec![0x3a.into()]), bc.body(block_3a).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(0x00.into(), ())]),
+			bc.body(block_0).unwrap()
+		);
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(0x1a.into(), ())]),
+			bc.body(block_1a).unwrap()
+		);
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(0x2a.into(), ())]),
+			bc.body(block_2a).unwrap()
+		);
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(0x3a.into(), ())]),
+			bc.body(block_3a).unwrap()
+		);
 	}

 	#[test]
 	fn indexed_data_block_body() {
 		let backend = Backend::<Block>::new_test_with_tx_storage(BlocksPruning::Some(1), 10);

-		let x0 = ExtrinsicWrapper::from(0u64).encode();
-		let x1 = ExtrinsicWrapper::from(1u64).encode();
+		let x0 = UncheckedXt::new_transaction(0.into(), ()).encode();
+		let x1 = UncheckedXt::new_transaction(1.into(), ()).encode();
 		let x0_hash = <HashingFor<Block> as sp_core::Hasher>::hash(&x0[1..]);
 		let x1_hash = <HashingFor<Block> as sp_core::Hasher>::hash(&x1[1..]);
 		let index = vec![
@@ -3597,7 +3653,10 @@ pub(crate) mod tests {
 			Default::default(),
 			None,
 			Default::default(),
-			vec![0u64.into(), 1u64.into()],
+			vec![
+				UncheckedXt::new_transaction(0.into(), ()),
+				UncheckedXt::new_transaction(1.into(), ()),
+			],
 			Some(index),
 		)
 		.unwrap();
@@ -3619,8 +3678,9 @@ pub(crate) mod tests {
 	fn index_invalid_size() {
 		let backend = Backend::<Block>::new_test_with_tx_storage(BlocksPruning::Some(1), 10);

-		let x0 = ExtrinsicWrapper::from(0u64).encode();
-		let x1 = ExtrinsicWrapper::from(1u64).encode();
+		let x0 = UncheckedXt::new_transaction(0.into(), ()).encode();
+		let x1 = UncheckedXt::new_transaction(1.into(), ()).encode();
+
 		let x0_hash = <HashingFor<Block> as sp_core::Hasher>::hash(&x0[..]);
 		let x1_hash = <HashingFor<Block> as sp_core::Hasher>::hash(&x1[..]);
 		let index = vec![
@@ -3641,7 +3701,10 @@ pub(crate) mod tests {
 			Default::default(),
 			None,
 			Default::default(),
-			vec![0u64.into(), 1u64.into()],
+			vec![
+				UncheckedXt::new_transaction(0.into(), ()),
+				UncheckedXt::new_transaction(1.into(), ()),
+			],
 			Some(index),
 		)
 		.unwrap();
@@ -3655,7 +3718,7 @@ pub(crate) mod tests {
 		let backend = Backend::<Block>::new_test_with_tx_storage(BlocksPruning::Some(2), 10);
 		let mut blocks = Vec::new();
 		let mut prev_hash = Default::default();
-		let x1 = ExtrinsicWrapper::from(0u64).encode();
+		let x1 = UncheckedXt::new_transaction(0.into(), ()).encode();
 		let x1_hash = <HashingFor<Block> as sp_core::Hasher>::hash(&x1[1..]);
 		for i in 0..10 {
 			let mut index = Vec::new();
@@ -3675,7 +3738,7 @@ pub(crate) mod tests {
 				prev_hash,
 				None,
 				Default::default(),
-				vec![i.into()],
+				vec![UncheckedXt::new_transaction(i.into(), ())],
 				Some(index),
 			)
 			.unwrap();
@@ -3709,7 +3772,7 @@ pub(crate) mod tests {
 				prev_hash,
 				None,
 				Default::default(),
-				vec![i.into()],
+				vec![UncheckedXt::new_transaction(i.into(), ())],
 				None,
 			)
 			.unwrap();
@@ -3724,7 +3787,7 @@ pub(crate) mod tests {
 				blocks[1],
 				None,
 				sp_core::H256::random(),
-				vec![i.into()],
+				vec![UncheckedXt::new_transaction(i.into(), ())],
 				None,
 			)
 			.unwrap();
@@ -3738,7 +3801,7 @@ pub(crate) mod tests {
 			blocks[0],
 			None,
 			sp_core::H256::random(),
-			vec![42.into()],
+			vec![UncheckedXt::new_transaction(42.into(), ())],
 			None,
 		)
 		.unwrap();
@@ -4211,7 +4274,7 @@ pub(crate) mod tests {
 				prev_hash,
 				None,
 				Default::default(),
-				vec![i.into()],
+				vec![UncheckedXt::new_transaction(i.into(), ())],
 				None,
 			)
 			.unwrap();
@@ -4226,7 +4289,10 @@ pub(crate) mod tests {

 		// Check that we can properly access values when there is reference count
 		// but no value.
-		assert_eq!(Some(vec![1.into()]), bc.body(blocks[1]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(1.into(), ())]),
+			bc.body(blocks[1]).unwrap()
+		);

 		// Block 1 gets pinned three times
 		backend.pin_block(blocks[1]).unwrap();
@@ -4243,27 +4309,42 @@ pub(crate) mod tests {

 		// Block 0, 1, 2, 3 are pinned, so all values should be cached.
 		// Block 4 is inside the pruning window, its value is in db.
-		assert_eq!(Some(vec![0.into()]), bc.body(blocks[0]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(0.into(), ())]),
+			bc.body(blocks[0]).unwrap()
+		);

-		assert_eq!(Some(vec![1.into()]), bc.body(blocks[1]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(1.into(), ())]),
+			bc.body(blocks[1]).unwrap()
+		);
 		assert_eq!(
 			Some(Justifications::from(build_justification(1))),
 			bc.justifications(blocks[1]).unwrap()
 		);

-		assert_eq!(Some(vec![2.into()]), bc.body(blocks[2]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(2.into(), ())]),
+			bc.body(blocks[2]).unwrap()
+		);
 		assert_eq!(
 			Some(Justifications::from(build_justification(2))),
 			bc.justifications(blocks[2]).unwrap()
 		);

-		assert_eq!(Some(vec![3.into()]), bc.body(blocks[3]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(3.into(), ())]),
+			bc.body(blocks[3]).unwrap()
+		);
 		assert_eq!(
 			Some(Justifications::from(build_justification(3))),
 			bc.justifications(blocks[3]).unwrap()
 		);

-		assert_eq!(Some(vec![4.into()]), bc.body(blocks[4]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(4.into(), ())]),
+			bc.body(blocks[4]).unwrap()
+		);
 		assert_eq!(
 			Some(Justifications::from(build_justification(4))),
 			bc.justifications(blocks[4]).unwrap()
@@ -4294,7 +4375,10 @@ pub(crate) mod tests {
 		assert!(bc.justifications(blocks[1]).unwrap().is_none());

 		// Block 4 is inside the pruning window and still kept
-		assert_eq!(Some(vec![4.into()]), bc.body(blocks[4]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(4.into(), ())]),
+			bc.body(blocks[4]).unwrap()
+		);
 		assert_eq!(
 			Some(Justifications::from(build_justification(4))),
 			bc.justifications(blocks[4]).unwrap()
@@ -4302,9 +4386,16 @@ pub(crate) mod tests {

 		// Block tree:
 		//   0 -> 1 -> 2 -> 3 -> 4 -> 5
-		let hash =
-			insert_block(&backend, 5, prev_hash, None, Default::default(), vec![5.into()], None)
-				.unwrap();
+		let hash = insert_block(
+			&backend,
+			5,
+			prev_hash,
+			None,
+			Default::default(),
+			vec![UncheckedXt::new_transaction(5.into(), ())],
+			None,
+		)
+		.unwrap();
 		blocks.push(hash);

 		backend.pin_block(blocks[4]).unwrap();
@@ -4319,12 +4410,18 @@ pub(crate) mod tests {
 		assert!(bc.body(blocks[2]).unwrap().is_none());
 		assert!(bc.body(blocks[3]).unwrap().is_none());

-		assert_eq!(Some(vec![4.into()]), bc.body(blocks[4]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(4.into(), ())]),
+			bc.body(blocks[4]).unwrap()
+		);
 		assert_eq!(
 			Some(Justifications::from(build_justification(4))),
 			bc.justifications(blocks[4]).unwrap()
 		);
-		assert_eq!(Some(vec![5.into()]), bc.body(blocks[5]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(5.into(), ())]),
+			bc.body(blocks[5]).unwrap()
+		);
 		assert!(bc.header(blocks[5]).ok().flatten().is_some());

 		backend.unpin_block(blocks[4]);
@@ -4334,9 +4431,16 @@ pub(crate) mod tests {
 		// Append a justification to block 5.
 		backend.append_justification(blocks[5], ([0, 0, 0, 1], vec![42])).unwrap();

-		let hash =
-			insert_block(&backend, 6, blocks[5], None, Default::default(), vec![6.into()], None)
-				.unwrap();
+		let hash = insert_block(
+			&backend,
+			6,
+			blocks[5],
+			None,
+			Default::default(),
+			vec![UncheckedXt::new_transaction(6.into(), ())],
+			None,
+		)
+		.unwrap();
 		blocks.push(hash);

 		// Pin block 5 so it gets loaded into the cache on prune
@@ -4349,7 +4453,10 @@ pub(crate) mod tests {
 		op.mark_finalized(blocks[6], None).unwrap();
 		backend.commit_operation(op).unwrap();

-		assert_eq!(Some(vec![5.into()]), bc.body(blocks[5]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(5.into(), ())]),
+			bc.body(blocks[5]).unwrap()
+		);
 		assert!(bc.header(blocks[5]).ok().flatten().is_some());
 		let mut expected = Justifications::from(build_justification(5));
 		expected.append(([0, 0, 0, 1], vec![42]));
@@ -4371,7 +4478,7 @@ pub(crate) mod tests {
 				prev_hash,
 				None,
 				Default::default(),
-				vec![i.into()],
+				vec![UncheckedXt::new_transaction(i.into(), ())],
 				None,
 			)
 			.unwrap();
@@ -4387,16 +4494,26 @@ pub(crate) mod tests {
 		// Block tree:
 		//   0 -> 1 -> 2 -> 3 -> 4
 		//        \ -> 2 -> 3
-		let fork_hash_root =
-			insert_block(&backend, 2, blocks[1], None, H256::random(), vec![2.into()], None)
-				.unwrap();
+		let fork_hash_root = insert_block(
+			&backend,
+			2,
+			blocks[1],
+			None,
+			H256::random(),
+			vec![UncheckedXt::new_transaction(2.into(), ())],
+			None,
+		)
+		.unwrap();
 		let fork_hash_3 = insert_block(
 			&backend,
 			3,
 			fork_hash_root,
 			None,
 			H256::random(),
-			vec![3.into(), 11.into()],
+			vec![
+				UncheckedXt::new_transaction(3.into(), ()),
+				UncheckedXt::new_transaction(11.into(), ()),
+			],
 			None,
 		)
 		.unwrap();
@@ -4417,14 +4534,35 @@ pub(crate) mod tests {
 		}

 		let bc = backend.blockchain();
-		assert_eq!(Some(vec![0.into()]), bc.body(blocks[0]).unwrap());
-		assert_eq!(Some(vec![1.into()]), bc.body(blocks[1]).unwrap());
-		assert_eq!(Some(vec![2.into()]), bc.body(blocks[2]).unwrap());
-		assert_eq!(Some(vec![3.into()]), bc.body(blocks[3]).unwrap());
-		assert_eq!(Some(vec![4.into()]), bc.body(blocks[4]).unwrap());
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(0.into(), ())]),
+			bc.body(blocks[0]).unwrap()
+		);
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(1.into(), ())]),
+			bc.body(blocks[1]).unwrap()
+		);
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(2.into(), ())]),
+			bc.body(blocks[2]).unwrap()
+		);
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(3.into(), ())]),
+			bc.body(blocks[3]).unwrap()
+		);
+		assert_eq!(
+			Some(vec![UncheckedXt::new_transaction(4.into(), ())]),
+			bc.body(blocks[4]).unwrap()
+		);
 		// Check the fork hashes.
 		assert_eq!(None, bc.body(fork_hash_root).unwrap());
-		assert_eq!(Some(vec![3.into(), 11.into()]), bc.body(fork_hash_3).unwrap());
+		assert_eq!(
+			Some(vec![
+				UncheckedXt::new_transaction(3.into(), ()),
+				UncheckedXt::new_transaction(11.into(), ())
+			]),
+			bc.body(fork_hash_3).unwrap()
+		);

 		// Unpin all blocks, except the forked one.
 		for block in &blocks {