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contracts: Make ChainExtension trait generic over the runtime (#8003)

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This commit is contained in:
Alexander Theißen
2021-02-03 12:29:18 +01:00
committed by GitHub
parent 06b432caba
commit 26b093ea8a
3 changed files with 11 additions and 8 deletions
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substrate/frame/contracts/src/chain_extension.rs
+7 -5
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@@ -63,7 +63,7 @@ use sp_std::{
pub use frame_system::Config as SysConfig;
pub use pallet_contracts_primitives::ReturnFlags;
pub use sp_core::crypto::UncheckedFrom;
pub use crate::exec::Ext;
pub use crate::{Config, exec::Ext};
pub use state::Init as InitState;
/// Result that returns a [`DispatchError`] on error.
@@ -74,7 +74,7 @@ pub type Result<T> = sp_std::result::Result<T, DispatchError>;
/// In order to create a custom chain extension this trait must be implemented and supplied
/// to the pallet contracts configuration trait as the associated type of the same name.
/// Consult the [module documentation](self) for a general explanation of chain extensions.
pub trait ChainExtension {
pub trait ChainExtension<C: Config> {
/// Call the chain extension logic.
///
/// This is the only function that needs to be implemented in order to write a
@@ -91,8 +91,9 @@ pub trait ChainExtension {
/// In case of `Err` the contract execution is immediately suspended and the passed error
/// is returned to the caller. Otherwise the value of [`RetVal`] determines the exit
/// behaviour.
fn call<E: Ext>(func_id: u32, env: Environment<E, InitState>) -> Result<RetVal>
fn call<E>(func_id: u32, env: Environment<E, InitState>) -> Result<RetVal>
where
E: Ext<T = C>,
<E::T as SysConfig>::AccountId: UncheckedFrom<<E::T as SysConfig>::Hash> + AsRef<[u8]>;
/// Determines whether chain extensions are enabled for this chain.
@@ -108,9 +109,10 @@ pub trait ChainExtension {
}
/// Implementation that indicates that no chain extension is available.
impl ChainExtension for () {
fn call<E: Ext>(_func_id: u32, mut _env: Environment<E, InitState>) -> Result<RetVal>
impl<C: Config> ChainExtension<C> for () {
fn call<E>(_func_id: u32, mut _env: Environment<E, InitState>) -> Result<RetVal>
where
E: Ext<T = C>,
<E::T as SysConfig>::AccountId: UncheckedFrom<<E::T as SysConfig>::Hash> + AsRef<[u8]>,
{
// Never called since [`Self::enabled()`] is set to `false`. Because we want to