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Fungibles and Non-Fungibles Create and Destroy Traits + Assets and Uniques Implementation (#9844)

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* refactor `do_destroy`

* destroy trait

* refactor do_force_create

* impl create trait

* do not bleed weight into api

* Do the same for uniques

* add docs
This commit is contained in:
Shawn Tabrizi
2021-09-26 18:05:01 -04:00
committed by GitHub
parent 0daa2b66ec
commit f8a228859e
8 changed files with 243 additions and 88 deletions
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substrate/frame/assets/src/lib.rs
+9 -56
View File
@@ -143,6 +143,7 @@ use codec::HasCompact;
use frame_support::{
dispatch::{DispatchError, DispatchResult},
ensure,
pallet_prelude::DispatchResultWithPostInfo,
traits::{
tokens::{fungibles, DepositConsequence, WithdrawConsequence},
BalanceStatus::Reserved,
@@ -437,29 +438,7 @@ pub mod pallet {
) -> DispatchResult {
T::ForceOrigin::ensure_origin(origin)?;
let owner = T::Lookup::lookup(owner)?;
ensure!(!Asset::<T, I>::contains_key(id), Error::<T, I>::InUse);
ensure!(!min_balance.is_zero(), Error::<T, I>::MinBalanceZero);
Asset::<T, I>::insert(
id,
AssetDetails {
owner: owner.clone(),
issuer: owner.clone(),
admin: owner.clone(),
freezer: owner.clone(),
supply: Zero::zero(),
deposit: Zero::zero(),
min_balance,
is_sufficient,
accounts: 0,
sufficients: 0,
approvals: 0,
is_frozen: false,
},
);
Self::deposit_event(Event::ForceCreated(id, owner));
Ok(())
Self::do_force_create(id, owner, is_sufficient, min_balance)
}
/// Destroy a class of fungible assets.
@@ -494,39 +473,13 @@ pub mod pallet {
Ok(_) => None,
Err(origin) => Some(ensure_signed(origin)?),
};
Asset::<T, I>::try_mutate_exists(id, |maybe_details| {
let mut details = maybe_details.take().ok_or(Error::<T, I>::Unknown)?;
if let Some(check_owner) = maybe_check_owner {
ensure!(details.owner == check_owner, Error::<T, I>::NoPermission);
}
ensure!(details.accounts <= witness.accounts, Error::<T, I>::BadWitness);
ensure!(details.sufficients <= witness.sufficients, Error::<T, I>::BadWitness);
ensure!(details.approvals <= witness.approvals, Error::<T, I>::BadWitness);
for (who, v) in Account::<T, I>::drain_prefix(id) {
Self::dead_account(id, &who, &mut details, v.sufficient);
}
debug_assert_eq!(details.accounts, 0);
debug_assert_eq!(details.sufficients, 0);
let metadata = Metadata::<T, I>::take(&id);
T::Currency::unreserve(
&details.owner,
details.deposit.saturating_add(metadata.deposit),
);
for ((owner, _), approval) in Approvals::<T, I>::drain_prefix((&id,)) {
T::Currency::unreserve(&owner, approval.deposit);
}
Self::deposit_event(Event::Destroyed(id));
Ok(Some(T::WeightInfo::destroy(
details.accounts.saturating_sub(details.sufficients),
details.sufficients,
details.approvals,
))
.into())
})
let details = Self::do_destroy(id, witness, maybe_check_owner)?;
Ok(Some(T::WeightInfo::destroy(
details.accounts.saturating_sub(details.sufficients),
details.sufficients,
details.approvals,
))
.into())
}
/// Mint assets of a particular class.