mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
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Adrian Catangiu
e7651cf41b
# Motivation (+testing)
### Enable easy `ForeignAssets` transfers using `pallet-xcm`
We had just previously added capabilities to teleport fees during
reserve-based transfers, but what about reserve-transferring fees when
needing to teleport some non-fee asset?
This PR aligns everything under either explicit reserve-transfer,
explicit teleport, or this new flexible `transfer_assets()` which can
mix and match as needed with fewer artificial constraints imposed to the
user.
This will enable, for example, a (non-system) parachain to teleport
their `ForeignAssets` assets to AssetHub while using DOT to pay fees.
(the assets are teleported - as foreign assets should from their owner
chain - while DOT used for fees can only be reserve-based transferred
between said parachain and AssetHub).
Added `xcm-emulator` tests for this scenario ^.
# Description
Reverts `(limited_)reserve_transfer_assets` to only allow reserve-based
transfers for all `assets` including fees.
Similarly `(limited_)teleport_assets` only allows teleports for all
`assets` including fees.
For complex combinations of asset transfers where assets and fees may
have different reserves or different reserve/teleport trust
configurations, users can use the newly added `transfer_assets()`
extrinsic which is more flexible in allowing more complex scenarios.
`assets` (excluding `fees`) must have same reserve location or otherwise
be teleportable to `dest`.
No limitations imposed on `fees`.
- for local reserve: transfer assets to sovereign account of destination
chain and forward a notification XCM to `dest` to mint and deposit
reserve-based assets to `beneficiary`.
- for destination reserve: burn local assets and forward a notification
to `dest` chain to withdraw the reserve assets from this chain's
sovereign account and deposit them to `beneficiary`.
- for remote reserve: burn local assets, forward XCM to reserve chain to
move reserves from this chain's SA to `dest` chain's SA, and forward
another XCM to `dest` to mint and deposit reserve-based assets to
`beneficiary`.
- for teleports: burn local assets and forward XCM to `dest` chain to
mint/teleport assets and deposit them to `beneficiary`.
## Review notes
Only around 500 lines are prod code (see `pallet_xcm/src/lib.rs`), the
rest of the PR is new tests and improving existing tests.
---------
Co-authored-by: command-bot <>
34 lines
1.8 KiB
TOML
34 lines
1.8 KiB
TOML
[package]
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name = "asset-hub-rococo-integration-tests"
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version = "1.0.0"
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authors.workspace = true
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edition.workspace = true
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license = "Apache-2.0"
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description = "Asset Hub Rococo runtime integration tests with xcm-emulator"
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publish = false
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[dependencies]
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codec = { package = "parity-scale-codec", version = "3.4.0", default-features = false }
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assert_matches = "1.5.0"
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# Substrate
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sp-runtime = { path = "../../../../../../../substrate/primitives/runtime", default-features = false }
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frame-support = { path = "../../../../../../../substrate/frame/support", default-features = false }
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pallet-balances = { path = "../../../../../../../substrate/frame/balances", default-features = false }
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pallet-assets = { path = "../../../../../../../substrate/frame/assets", default-features = false }
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pallet-asset-conversion = { path = "../../../../../../../substrate/frame/asset-conversion", default-features = false }
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pallet-message-queue = { path = "../../../../../../../substrate/frame/message-queue", default-features = false }
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# Polkadot
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xcm = { package = "staging-xcm", path = "../../../../../../../polkadot/xcm", default-features = false }
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pallet-xcm = { path = "../../../../../../../polkadot/xcm/pallet-xcm", default-features = false }
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xcm-executor = { package = "staging-xcm-executor", path = "../../../../../../../polkadot/xcm/xcm-executor", default-features = false }
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rococo-runtime = { path = "../../../../../../../polkadot/runtime/rococo" }
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# Cumulus
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asset-test-utils = { path = "../../../../../runtimes/assets/test-utils" }
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parachains-common = { path = "../../../../../../parachains/common" }
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asset-hub-rococo-runtime = { path = "../../../../../runtimes/assets/asset-hub-rococo" }
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emulated-integration-tests-common = { path = "../../../common", default-features = false }
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rococo-system-emulated-network = { path = "../../../networks/rococo-system" }
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