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Use MultiLocation as xtokens transfer dest type. #396

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Merged
merged 2 commits into from
Mar 12, 2021
Merged

Use MultiLocation as xtokens transfer dest type. #396

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57fed08
Use MultiLocation as xtokens transfer dest type.
shaunxw Mar 12, 2021
ad5f272
Make clippy happy.
shaunxw Mar 12, 2021
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63 changes: 14 additions & 49 deletions xtokens/src/lib.rs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
#![cfg_attr(not(feature = "std"), no_std)]
#![allow(clippy::from_over_into)]
#![allow(clippy::unused_unit)]
#![allow(clippy::large_enum_variant)]

pub use module::*;

Expand Down Expand Up @@ -89,19 +90,11 @@ pub mod module {

/// Transferred to parachain. \[x_currency_id, src, para_id, dest,
/// dest_network, amount\]
TransferredToParachain(XCurrencyId, T::AccountId, ParaId, T::AccountId, NetworkId, T::Balance),
TransferredToParachain(XCurrencyId, T::AccountId, ParaId, MultiLocation, T::Balance),

/// Transfer to parachain failed. \[x_currency_id, src, para_id, dest,
/// dest_network, amount, error\]
TransferToParachainFailed(
XCurrencyId,
T::AccountId,
ParaId,
T::AccountId,
NetworkId,
T::Balance,
XcmError,
),
TransferToParachainFailed(XCurrencyId, T::AccountId, ParaId, MultiLocation, T::Balance, XcmError),
}

#[pallet::error]
Expand Down Expand Up @@ -164,8 +157,7 @@ pub mod module {
origin: OriginFor<T>,
x_currency_id: XCurrencyId,
para_id: ParaId,
dest: T::AccountId,
dest_network: NetworkId,
dest: MultiLocation,
amount: T::Balance,
) -> DispatchResultWithPostInfo {
let who = ensure_signed(origin)?;
Expand All @@ -175,25 +167,16 @@ pub mod module {
}

let xcm = match x_currency_id.chain_id {
ChainId::RelayChain => {
Self::transfer_relay_chain_tokens_to_parachain(para_id, &dest, dest_network.clone(), amount)
}
ChainId::RelayChain => Self::transfer_relay_chain_tokens_to_parachain(para_id, dest.clone(), amount),
ChainId::ParaChain(reserve_chain) => {
if T::ParaId::get() == reserve_chain {
Self::transfer_owned_tokens_to_parachain(
x_currency_id.clone(),
para_id,
&dest,
dest_network.clone(),
amount,
)
Self::transfer_owned_tokens_to_parachain(x_currency_id.clone(), para_id, dest.clone(), amount)
} else {
Self::transfer_non_owned_tokens_to_parachain(
reserve_chain,
x_currency_id.clone(),
para_id,
&dest,
dest_network.clone(),
dest.clone(),
amount,
)
}
Expand All @@ -209,15 +192,13 @@ pub mod module {
who,
para_id,
dest,
dest_network,
amount,
)),
Err(err) => Self::deposit_event(Event::<T>::TransferToParachainFailed(
x_currency_id,
who,
para_id,
dest,
dest_network,
amount,
err,
)),
Expand All @@ -228,12 +209,7 @@ pub mod module {
}

impl<T: Config> Pallet<T> {
fn transfer_relay_chain_tokens_to_parachain(
para_id: ParaId,
dest: &T::AccountId,
dest_network: NetworkId,
amount: T::Balance,
) -> Xcm {
fn transfer_relay_chain_tokens_to_parachain(para_id: ParaId, dest: MultiLocation, amount: T::Balance) -> Xcm {
Xcm::WithdrawAsset {
assets: vec![MultiAsset::ConcreteFungible {
id: MultiLocation::X1(Junction::Parent),
Expand All @@ -244,14 +220,11 @@ pub mod module {
reserve: MultiLocation::X1(Junction::Parent),
effects: vec![Order::DepositReserveAsset {
assets: vec![MultiAsset::All],
// `dest` is children parachain(of parent).
// Reserve asset deposit dest is children parachain(of parent).
dest: MultiLocation::X1(Junction::Parachain { id: para_id.into() }),
effects: vec![Order::DepositAsset {
assets: vec![MultiAsset::All],
dest: MultiLocation::X1(Junction::AccountId32 {
network: dest_network,
id: T::AccountId32Convert::convert(dest.clone()),
}),
dest,
}],
}],
}],
Expand All @@ -265,8 +238,7 @@ pub mod module {
fn transfer_owned_tokens_to_parachain(
x_currency_id: XCurrencyId,
para_id: ParaId,
dest: &T::AccountId,
dest_network: NetworkId,
dest: MultiLocation,
amount: T::Balance,
) -> Xcm {
Xcm::WithdrawAsset {
Expand All @@ -279,10 +251,7 @@ pub mod module {
dest: MultiLocation::X2(Junction::Parent, Junction::Parachain { id: para_id.into() }),
effects: vec![Order::DepositAsset {
assets: vec![MultiAsset::All],
dest: MultiLocation::X1(Junction::AccountId32 {
network: dest_network,
id: T::AccountId32Convert::convert(dest.clone()),
}),
dest,
}],
}],
}
Expand All @@ -294,16 +263,12 @@ pub mod module {
reserve_chain: ParaId,
x_currency_id: XCurrencyId,
para_id: ParaId,
dest: &T::AccountId,
dest_network: NetworkId,
dest: MultiLocation,
amount: T::Balance,
) -> Xcm {
let deposit_to_dest = Order::DepositAsset {
assets: vec![MultiAsset::All],
dest: MultiLocation::X1(Junction::AccountId32 {
network: dest_network,
id: T::AccountId32Convert::convert(dest.clone()),
}),
dest,
};
// If transfer to reserve chain, deposit to `dest` on reserve chain,
// else deposit reserve asset.
Expand Down