Muharem
5ce04514eb
Introduces a swap implementation that allows the exchange of a credit (aka Negative Imbalance) of one asset for a credit of another asset. This is particularly useful when a credit swap is required but may not have sufficient value to meet the ED constraint, hence cannot be deposited to temp account before. An example use case is when XCM fees are paid using an asset held in the XCM executor registry and has to be swapped for native currency. Additional Updates: - encapsulates the existing `Swap` trait impl within a transactional context, since partial storage mutation is possible when an error occurs; - supplied `Currency` and `Assets` impls must be implemented over the same `Balance` type, the `AssetBalance` generic type is dropped. This helps to avoid numerous type conversion and overflow cases. If those types are different it should be handled outside of the pallet; - `Box` asset kind on a pallet level, unbox on a runtime level - here [why](https://substrate.stackexchange.com/questions/10039/boxed-argument-of-a-dispatchable/10103#10103); - `path` uses `Vec` now, instead of `BoundedVec` since it is never used in PoV; - removes the `Transfer` event due to it's redundancy with the events emitted by `fungible/s` implementations; - modifies the `SwapExecuted` event type; related issue: - https://github.com/paritytech/polkadot-sdk/issues/105 related PRs: - (required for) https://github.com/paritytech/polkadot-sdk/pull/1845 - (caused) https://github.com/paritytech/polkadot-sdk/pull/1717 // DONE make the pallet work only with `fungibles` trait and make it free from the concept of a `native` asset - https://github.com/paritytech/polkadot-sdk/issues/1842 --------- Co-authored-by: joe petrowski <25483142+joepetrowski@users.noreply.github.com>
pallet-asset-conversion-tx-payment
Asset Conversion Transaction Payment Pallet
This pallet allows runtimes that include it to pay for transactions in assets other than the native token of the chain.
Overview
It does this by extending transactions to include an optional AssetId that specifies the asset
to be used for payment (defaulting to the native token on None). It expects an
[OnChargeAssetTransaction] implementation analogously to [pallet-transaction-payment]. The
included [AssetConversionAdapter] (implementing [OnChargeAssetTransaction]) determines the fee
amount by converting the fee calculated by [pallet-transaction-payment] into the desired
asset.
Integration
This pallet wraps FRAME's transaction payment pallet and functions as a replacement. This means
you should include both pallets in your construct_runtime macro, but only include this
pallet's [SignedExtension] ([ChargeAssetTxPayment]).
License: Apache-2.0