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// This file is part of Substrate.
// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#![doc = include_str!("../README.md")]
#![allow(rustdoc::private_intra_doc_links)]
#![cfg_attr(not(feature = "std"), no_std)]
#![cfg_attr(feature = "runtime-benchmarks", recursion_limit = "1024")]
extern crate alloc;
mod address;
mod benchmarking;
mod exec;
mod gas;
mod limits;
mod primitives;
mod storage;
mod transient_storage;
mod wasm;
#[cfg(test)]
mod tests;
pub mod chain_extension;
pub mod debug;
pub mod evm;
pub mod test_utils;
pub mod weights;
use crate::{
evm::{runtime::GAS_PRICE, GenericTransaction},
exec::{AccountIdOf, ExecError, Executable, Ext, Key, Origin, Stack as ExecStack},
gas::GasMeter,
storage::{meter::Meter as StorageMeter, ContractInfo, DeletionQueueManager},
wasm::{CodeInfo, RuntimeCosts, WasmBlob},
};
use alloc::{boxed::Box, format, vec};
use codec::{Codec, Decode, Encode};
use environmental::*;
use frame_support::{
dispatch::{
DispatchErrorWithPostInfo, DispatchResultWithPostInfo, GetDispatchInfo, Pays,
PostDispatchInfo, RawOrigin,
},
ensure,
pallet_prelude::DispatchClass,
traits::{
fungible::{Inspect, Mutate, MutateHold},
tokens::{Fortitude::Polite, Preservation::Preserve},
ConstU32, ConstU64, Contains, EnsureOrigin, Get, IsType, OriginTrait, Time,
},
weights::{Weight, WeightMeter},
BoundedVec, RuntimeDebugNoBound,
};
use frame_system::{
ensure_signed,
pallet_prelude::{BlockNumberFor, OriginFor},
EventRecord, Pallet as System,
};
use pallet_transaction_payment::OnChargeTransaction;
use scale_info::TypeInfo;
use sp_core::{H160, H256, U256};
use sp_runtime::{
traits::{BadOrigin, Bounded, Convert, Dispatchable, Saturating, Zero},
DispatchError,
};
pub use crate::{
address::{create1, create2, AccountId32Mapper, AddressMapper},
debug::Tracing,
exec::MomentOf,
pallet::*,
};
pub use primitives::*;
pub use weights::WeightInfo;
#[cfg(doc)]
pub use crate::wasm::SyscallDoc;
type TrieId = BoundedVec<u8, ConstU32<128>>;
type BalanceOf<T> =
<<T as Config>::Currency as Inspect<<T as frame_system::Config>::AccountId>>::Balance;
type OnChargeTransactionBalanceOf<T> = <<T as pallet_transaction_payment::Config>::OnChargeTransaction as OnChargeTransaction<T>>::Balance;
type CodeVec = BoundedVec<u8, ConstU32<{ limits::code::BLOB_BYTES }>>;
type EventRecordOf<T> =
EventRecord<<T as frame_system::Config>::RuntimeEvent, <T as frame_system::Config>::Hash>;
type DebugBuffer = BoundedVec<u8, ConstU32<{ limits::DEBUG_BUFFER_BYTES }>>;
type ImmutableData = BoundedVec<u8, ConstU32<{ limits::IMMUTABLE_BYTES }>>;
/// Used as a sentinel value when reading and writing contract memory.
///
/// It is usually used to signal `None` to a contract when only a primitive is allowed
/// and we don't want to go through encoding a full Rust type. Using `u32::Max` is a safe
/// sentinel because contracts are never allowed to use such a large amount of resources
/// that this value makes sense for a memory location or length.
const SENTINEL: u32 = u32::MAX;
/// The target that is used for the log output emitted by this crate.
///
/// Hence you can use this target to selectively increase the log level for this crate.
///
/// Example: `RUST_LOG=runtime::revive=debug my_code --dev`
const LOG_TARGET: &str = "runtime::revive";
#[frame_support::pallet]
pub mod pallet {
use super::*;
use crate::debug::Debugger;
use frame_support::pallet_prelude::*;
use frame_system::pallet_prelude::*;
use sp_core::U256;
use sp_runtime::Perbill;
/// The in-code storage version.
pub(crate) const STORAGE_VERSION: StorageVersion = StorageVersion::new(0);
#[pallet::pallet]
#[pallet::storage_version(STORAGE_VERSION)]
pub struct Pallet<T>(_);
#[pallet::config(with_default)]
pub trait Config: frame_system::Config {
/// The time implementation used to supply timestamps to contracts through `seal_now`.
type Time: Time;
/// The fungible in which fees are paid and contract balances are held.
#[pallet::no_default]
type Currency: Inspect<Self::AccountId>
+ Mutate<Self::AccountId>
+ MutateHold<Self::AccountId, Reason = Self::RuntimeHoldReason>;
/// The overarching event type.
#[pallet::no_default_bounds]
type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;
/// The overarching call type.
#[pallet::no_default_bounds]
type RuntimeCall: Parameter
+ Dispatchable<RuntimeOrigin = Self::RuntimeOrigin, PostInfo = PostDispatchInfo>
+ GetDispatchInfo;
/// Overarching hold reason.
#[pallet::no_default_bounds]
type RuntimeHoldReason: From<HoldReason>;
/// Filter that is applied to calls dispatched by contracts.
///
/// Use this filter to control which dispatchables are callable by contracts.
/// This is applied in **addition** to [`frame_system::Config::BaseCallFilter`].
/// It is recommended to treat this as a whitelist.
///
/// # Stability
///
/// The runtime **must** make sure that all dispatchables that are callable by
/// contracts remain stable. In addition [`Self::RuntimeCall`] itself must remain stable.
/// This means that no existing variants are allowed to switch their positions.
///
/// # Note
///
/// Note that dispatchables that are called via contracts do not spawn their
/// own wasm instance for each call (as opposed to when called via a transaction).
/// Therefore please make sure to be restrictive about which dispatchables are allowed
/// in order to not introduce a new DoS vector like memory allocation patterns that can
/// be exploited to drive the runtime into a panic.
///
/// This filter does not apply to XCM transact calls. To impose restrictions on XCM transact
/// calls, you must configure them separately within the XCM pallet itself.
#[pallet::no_default_bounds]
type CallFilter: Contains<<Self as frame_system::Config>::RuntimeCall>;
/// Used to answer contracts' queries regarding the current weight price. This is **not**
/// used to calculate the actual fee and is only for informational purposes.
#[pallet::no_default_bounds]
type WeightPrice: Convert<Weight, BalanceOf<Self>>;
/// Describes the weights of the dispatchables of this module and is also used to
/// construct a default cost schedule.
type WeightInfo: WeightInfo;
/// Type that allows the runtime authors to add new host functions for a contract to call.
#[pallet::no_default_bounds]
type ChainExtension: chain_extension::ChainExtension<Self> + Default;
/// The amount of balance a caller has to pay for each byte of storage.
///
/// # Note
///
/// It is safe to change this value on a live chain as all refunds are pro rata.
#[pallet::constant]
#[pallet::no_default_bounds]
type DepositPerByte: Get<BalanceOf<Self>>;
/// The amount of balance a caller has to pay for each storage item.
///
/// # Note
///
/// It is safe to change this value on a live chain as all refunds are pro rata.
#[pallet::constant]
#[pallet::no_default_bounds]
type DepositPerItem: Get<BalanceOf<Self>>;
/// The percentage of the storage deposit that should be held for using a code hash.
/// Instantiating a contract, or calling [`chain_extension::Ext::lock_delegate_dependency`]
/// protects the code from being removed. In order to prevent abuse these actions are
/// protected with a percentage of the code deposit.
#[pallet::constant]
type CodeHashLockupDepositPercent: Get<Perbill>;
/// Use either valid type is [`address::AccountId32Mapper`] or [`address::H160Mapper`].
#[pallet::no_default]
type AddressMapper: AddressMapper<Self>;
/// Make contract callable functions marked as `#[unstable]` available.
///
/// Contracts that use `#[unstable]` functions won't be able to be uploaded unless
/// this is set to `true`. This is only meant for testnets and dev nodes in order to
/// experiment with new features.
///
/// # Warning
///
/// Do **not** set to `true` on productions chains.
#[pallet::constant]
type UnsafeUnstableInterface: Get<bool>;
/// Origin allowed to upload code.
///
/// By default, it is safe to set this to `EnsureSigned`, allowing anyone to upload contract
/// code.
#[pallet::no_default_bounds]
type UploadOrigin: EnsureOrigin<Self::RuntimeOrigin, Success = Self::AccountId>;
/// Origin allowed to instantiate code.
///
/// # Note
///
/// This is not enforced when a contract instantiates another contract. The
/// [`Self::UploadOrigin`] should make sure that no code is deployed that does unwanted
/// instantiations.
///
/// By default, it is safe to set this to `EnsureSigned`, allowing anyone to instantiate
/// contract code.
#[pallet::no_default_bounds]
type InstantiateOrigin: EnsureOrigin<Self::RuntimeOrigin, Success = Self::AccountId>;
/// For most production chains, it's recommended to use the `()` implementation of this
/// trait. This implementation offers additional logging when the log target
/// "runtime::revive" is set to trace.
#[pallet::no_default_bounds]
type Debug: Debugger<Self>;
/// A type that exposes XCM APIs, allowing contracts to interact with other parachains, and
/// execute XCM programs.
#[pallet::no_default_bounds]
type Xcm: xcm_builder::Controller<
OriginFor<Self>,
<Self as frame_system::Config>::RuntimeCall,
BlockNumberFor<Self>,
>;
/// The amount of memory in bytes that parachain nodes a lot to the runtime.
///
/// This is used in [`Pallet::integrity_test`] to make sure that the runtime has enough
/// memory to support this pallet if set to the correct value.
type RuntimeMemory: Get<u32>;
/// The amount of memory in bytes that relay chain validators a lot to the PoV.
///
/// This is used in [`Pallet::integrity_test`] to make sure that the runtime has enough
/// memory to support this pallet if set to the correct value.
///
/// This value is usually higher than [`Self::RuntimeMemory`] to account for the fact
/// that validators have to hold all storage items in PvF memory.
type PVFMemory: Get<u32>;
/// The [EIP-155](https://eips.ethereum.org/EIPS/eip-155) chain ID.
///
/// This is a unique identifier assigned to each blockchain network,
/// preventing replay attacks.
#[pallet::constant]
type ChainId: Get<u64>;
/// The ratio between the decimal representation of the native token and the ETH token.
#[pallet::constant]
type NativeToEthRatio: Get<u32>;
}
/// Container for different types that implement [`DefaultConfig`]` of this pallet.
pub mod config_preludes {
use super::*;
use frame_support::{
derive_impl,
traits::{ConstBool, ConstU32},
};
use frame_system::EnsureSigned;
use sp_core::parameter_types;
type AccountId = sp_runtime::AccountId32;
type Balance = u64;
const UNITS: Balance = 10_000_000_000;
const CENTS: Balance = UNITS / 100;
pub const fn deposit(items: u32, bytes: u32) -> Balance {
items as Balance * 1 * CENTS + (bytes as Balance) * 1 * CENTS
}
parameter_types! {
pub const DepositPerItem: Balance = deposit(1, 0);
pub const DepositPerByte: Balance = deposit(0, 1);
pub const CodeHashLockupDepositPercent: Perbill = Perbill::from_percent(0);
}
/// A type providing default configurations for this pallet in testing environment.
pub struct TestDefaultConfig;
impl Time for TestDefaultConfig {
type Moment = u64;
fn now() -> Self::Moment {
unimplemented!("No default `now` implementation in `TestDefaultConfig` provide a custom `T::Time` type.")
}
}
impl<T: From<u64>> Convert<Weight, T> for TestDefaultConfig {
fn convert(w: Weight) -> T {
w.ref_time().into()
}
}
#[derive_impl(frame_system::config_preludes::TestDefaultConfig, no_aggregated_types)]
impl frame_system::DefaultConfig for TestDefaultConfig {}
#[frame_support::register_default_impl(TestDefaultConfig)]
impl DefaultConfig for TestDefaultConfig {
#[inject_runtime_type]
type RuntimeEvent = ();
#[inject_runtime_type]
type RuntimeHoldReason = ();
#[inject_runtime_type]
type RuntimeCall = ();
type CallFilter = ();
type ChainExtension = ();
type CodeHashLockupDepositPercent = CodeHashLockupDepositPercent;
type DepositPerByte = DepositPerByte;
type DepositPerItem = DepositPerItem;
type Time = Self;
type UnsafeUnstableInterface = ConstBool<true>;
type UploadOrigin = EnsureSigned<AccountId>;
type InstantiateOrigin = EnsureSigned<AccountId>;
type WeightInfo = ();
type WeightPrice = Self;
type Debug = ();
type Xcm = ();
type RuntimeMemory = ConstU32<{ 128 * 1024 * 1024 }>;
type PVFMemory = ConstU32<{ 512 * 1024 * 1024 }>;
type ChainId = ConstU64<0>;
type NativeToEthRatio = ConstU32<1>;
}
}
#[pallet::event]
pub enum Event<T: Config> {
/// Contract deployed by address at the specified address.
Instantiated { deployer: H160, contract: H160 },
/// Contract has been removed.
///
/// # Note
///
/// The only way for a contract to be removed and emitting this event is by calling
/// `seal_terminate`.
Terminated {
/// The contract that was terminated.
contract: H160,
/// The account that received the contracts remaining balance
beneficiary: H160,
},
/// Code with the specified hash has been stored.
CodeStored { code_hash: H256, deposit_held: BalanceOf<T>, uploader: H160 },
/// A custom event emitted by the contract.
ContractEmitted {
/// The contract that emitted the event.
contract: H160,
/// Data supplied by the contract. Metadata generated during contract compilation
/// is needed to decode it.
data: Vec<u8>,
/// A list of topics used to index the event.
/// Number of topics is capped by [`limits::NUM_EVENT_TOPICS`].
topics: Vec<H256>,
},
/// A code with the specified hash was removed.
CodeRemoved { code_hash: H256, deposit_released: BalanceOf<T>, remover: H160 },
/// A contract's code was updated.
ContractCodeUpdated {
/// The contract that has been updated.
contract: H160,
/// New code hash that was set for the contract.
new_code_hash: H256,
/// Previous code hash of the contract.
old_code_hash: H256,
},
/// A contract was called either by a plain account or another contract.
///
/// # Note
///
/// Please keep in mind that like all events this is only emitted for successful
/// calls. This is because on failure all storage changes including events are
/// rolled back.
Called {
/// The caller of the `contract`.
caller: Origin<T>,
/// The contract that was called.
contract: H160,
},
/// A contract delegate called a code hash.
///
/// # Note
///
/// Please keep in mind that like all events this is only emitted for successful
/// calls. This is because on failure all storage changes including events are
/// rolled back.
DelegateCalled {
/// The contract that performed the delegate call and hence in whose context
/// the `code_hash` is executed.
contract: H160,
/// The code hash that was delegate called.
code_hash: H256,
},
/// Some funds have been transferred and held as storage deposit.
StorageDepositTransferredAndHeld { from: H160, to: H160, amount: BalanceOf<T> },
/// Some storage deposit funds have been transferred and released.
StorageDepositTransferredAndReleased { from: H160, to: H160, amount: BalanceOf<T> },
}
#[pallet::error]
pub enum Error<T> {
/// Invalid schedule supplied, e.g. with zero weight of a basic operation.
InvalidSchedule,
/// Invalid combination of flags supplied to `seal_call` or `seal_delegate_call`.
InvalidCallFlags,
/// The executed contract exhausted its gas limit.
OutOfGas,
/// Performing the requested transfer failed. Probably because there isn't enough
/// free balance in the sender's account.
TransferFailed,
/// Performing a call was denied because the calling depth reached the limit
/// of what is specified in the schedule.
MaxCallDepthReached,
/// No contract was found at the specified address.
ContractNotFound,
/// No code could be found at the supplied code hash.
CodeNotFound,
/// No code info could be found at the supplied code hash.
CodeInfoNotFound,
/// A buffer outside of sandbox memory was passed to a contract API function.
OutOfBounds,
/// Input passed to a contract API function failed to decode as expected type.
DecodingFailed,
/// Contract trapped during execution.
ContractTrapped,
/// The size defined in `T::MaxValueSize` was exceeded.
ValueTooLarge,
/// Termination of a contract is not allowed while the contract is already
/// on the call stack. Can be triggered by `seal_terminate`.
TerminatedWhileReentrant,
/// `seal_call` forwarded this contracts input. It therefore is no longer available.
InputForwarded,
/// The amount of topics passed to `seal_deposit_events` exceeds the limit.
TooManyTopics,
/// The chain does not provide a chain extension. Calling the chain extension results
/// in this error. Note that this usually shouldn't happen as deploying such contracts
/// is rejected.
NoChainExtension,
/// Failed to decode the XCM program.
XCMDecodeFailed,
/// A contract with the same AccountId already exists.
DuplicateContract,
/// A contract self destructed in its constructor.
///
/// This can be triggered by a call to `seal_terminate`.
TerminatedInConstructor,
/// A call tried to invoke a contract that is flagged as non-reentrant.
ReentranceDenied,
/// A contract called into the runtime which then called back into this pallet.
ReenteredPallet,
/// A contract attempted to invoke a state modifying API while being in read-only mode.
StateChangeDenied,
/// Origin doesn't have enough balance to pay the required storage deposits.
StorageDepositNotEnoughFunds,
/// More storage was created than allowed by the storage deposit limit.
StorageDepositLimitExhausted,
/// Code removal was denied because the code is still in use by at least one contract.
CodeInUse,
/// The contract ran to completion but decided to revert its storage changes.
/// Please note that this error is only returned from extrinsics. When called directly
/// or via RPC an `Ok` will be returned. In this case the caller needs to inspect the flags
/// to determine whether a reversion has taken place.
ContractReverted,
/// The contract failed to compile or is missing the correct entry points.
///
/// A more detailed error can be found on the node console if debug messages are enabled
/// by supplying `-lruntime::revive=debug`.
CodeRejected,
/// The code blob supplied is larger than [`limits::code::BLOB_BYTES`].
BlobTooLarge,
/// The static memory consumption of the blob will be larger than
/// [`limits::code::STATIC_MEMORY_BYTES`].
StaticMemoryTooLarge,
/// The program contains a basic block that is larger than allowed.
BasicBlockTooLarge,
/// The program contains an invalid instruction.
InvalidInstruction,
/// The contract has reached its maximum number of delegate dependencies.
MaxDelegateDependenciesReached,
/// The dependency was not found in the contract's delegate dependencies.
DelegateDependencyNotFound,
/// The contract already depends on the given delegate dependency.
DelegateDependencyAlreadyExists,
/// Can not add a delegate dependency to the code hash of the contract itself.
CannotAddSelfAsDelegateDependency,
/// Can not add more data to transient storage.
OutOfTransientStorage,
/// The contract tried to call a syscall which does not exist (at its current api level).
InvalidSyscall,
/// Invalid storage flags were passed to one of the storage syscalls.
InvalidStorageFlags,
/// PolkaVM failed during code execution. Probably due to a malformed program.
ExecutionFailed,
/// Failed to convert a U256 to a Balance.
BalanceConversionFailed,
/// Failed to convert an EVM balance to a native balance.
DecimalPrecisionLoss,
/// Immutable data can only be set during deploys and only be read during calls.
/// Additionally, it is only valid to set the data once and it must not be empty.
InvalidImmutableAccess,
/// An `AccountID32` account tried to interact with the pallet without having a mapping.
///
/// Call [`Pallet::map_account`] in order to create a mapping for the account.
AccountUnmapped,
/// Tried to map an account that is already mapped.
AccountAlreadyMapped,
}
/// A reason for the pallet contracts placing a hold on funds.
#[pallet::composite_enum]
pub enum HoldReason {
/// The Pallet has reserved it for storing code on-chain.
CodeUploadDepositReserve,
/// The Pallet has reserved it for storage deposit.
StorageDepositReserve,
/// Deposit for creating an address mapping in [`AddressSuffix`].
AddressMapping,
}
/// A mapping from a contract's code hash to its code.
#[pallet::storage]
pub(crate) type PristineCode<T: Config> = StorageMap<_, Identity, H256, CodeVec>;
/// A mapping from a contract's code hash to its code info.
#[pallet::storage]
pub(crate) type CodeInfoOf<T: Config> = StorageMap<_, Identity, H256, CodeInfo<T>>;
/// The code associated with a given account.
#[pallet::storage]
pub(crate) type ContractInfoOf<T: Config> = StorageMap<_, Identity, H160, ContractInfo<T>>;
/// The immutable data associated with a given account.
#[pallet::storage]
pub(crate) type ImmutableDataOf<T: Config> = StorageMap<_, Identity, H160, ImmutableData>;
/// Evicted contracts that await child trie deletion.
///
/// Child trie deletion is a heavy operation depending on the amount of storage items
/// stored in said trie. Therefore this operation is performed lazily in `on_idle`.
#[pallet::storage]
pub(crate) type DeletionQueue<T: Config> = StorageMap<_, Twox64Concat, u32, TrieId>;
/// A pair of monotonic counters used to track the latest contract marked for deletion
/// and the latest deleted contract in queue.
#[pallet::storage]
pub(crate) type DeletionQueueCounter<T: Config> =
StorageValue<_, DeletionQueueManager<T>, ValueQuery>;
/// Map a Ethereum address to its original `AccountId32`.
///
/// Stores the last 12 byte for addresses that were originally an `AccountId32` instead
/// of an `H160`. Register your `AccountId32` using [`Pallet::map_account`] in order to
/// use it with this pallet.
#[pallet::storage]
pub(crate) type AddressSuffix<T: Config> = StorageMap<_, Identity, H160, [u8; 12]>;
#[pallet::hooks]
impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
fn on_idle(_block: BlockNumberFor<T>, limit: Weight) -> Weight {
let mut meter = WeightMeter::with_limit(limit);
ContractInfo::<T>::process_deletion_queue_batch(&mut meter);
meter.consumed()
}
fn integrity_test() {
use limits::code::STATIC_MEMORY_BYTES;
// The memory available in the block building runtime
let max_runtime_mem: u32 = T::RuntimeMemory::get();
// The root frame is not accounted in CALL_STACK_DEPTH
let max_call_depth =
limits::CALL_STACK_DEPTH.checked_add(1).expect("CallStack size is too big");
// Transient storage uses a BTreeMap, which has overhead compared to the raw size of
// key-value data. To ensure safety, a margin of 2x the raw key-value size is used.
let max_transient_storage_size = limits::TRANSIENT_STORAGE_BYTES
.checked_mul(2)
.expect("MaxTransientStorageSize is too large");
// We only allow 50% of the runtime memory to be utilized by the contracts call
// stack, keeping the rest for other facilities, such as PoV, etc.
const TOTAL_MEMORY_DEVIDER: u32 = 2;
// The inefficiencies of the freeing-bump allocator
// being used in the client for the runtime memory allocations, could lead to possible
// memory allocations grow up to `x4` times in some extreme cases.
const MEMORY_ALLOCATOR_INEFFICENCY_DEVIDER: u32 = 4;
// Check that the configured `STATIC_MEMORY_BYTES` fits into runtime memory.
//
// `STATIC_MEMORY_BYTES` is the amount of memory that a contract can consume
// in memory and is enforced at upload time.
//
// Dynamic allocations are not available, yet. Hence are not taken into consideration
// here.
let static_memory_limit = max_runtime_mem
.saturating_div(TOTAL_MEMORY_DEVIDER)
.saturating_sub(max_transient_storage_size)
.saturating_div(max_call_depth)
.saturating_sub(STATIC_MEMORY_BYTES)
.saturating_div(MEMORY_ALLOCATOR_INEFFICENCY_DEVIDER);
assert!(
STATIC_MEMORY_BYTES < static_memory_limit,
"Given `CallStack` height {:?}, `STATIC_MEMORY_LIMIT` should be set less than {:?} \
(current value is {:?}), to avoid possible runtime oom issues.",
max_call_depth,
static_memory_limit,
STATIC_MEMORY_BYTES,
);
// Validators are configured to be able to use more memory than block builders. This is
// because in addition to `max_runtime_mem` they need to hold additional data in
// memory: PoV in multiple copies (1x encoded + 2x decoded) and all storage which
// includes emitted events. The assumption is that storage/events size
// can be a maximum of half of the validator runtime memory - max_runtime_mem.
let max_block_ref_time = T::BlockWeights::get()
.get(DispatchClass::Normal)
.max_total
.unwrap_or_else(|| T::BlockWeights::get().max_block)
.ref_time();
let max_payload_size = limits::PAYLOAD_BYTES;
let max_key_size =
Key::try_from_var(alloc::vec![0u8; limits::STORAGE_KEY_BYTES as usize])
.expect("Key of maximal size shall be created")
.hash()
.len() as u32;
let max_immutable_key_size = T::AccountId::max_encoded_len() as u32;
let max_immutable_size: u32 = ((max_block_ref_time /
(<RuntimeCosts as gas::Token<T>>::weight(&RuntimeCosts::SetImmutableData(
limits::IMMUTABLE_BYTES,
))
.ref_time()))
.saturating_mul(limits::IMMUTABLE_BYTES.saturating_add(max_immutable_key_size) as u64))
.try_into()
.expect("Immutable data size too big");
// We can use storage to store items using the available block ref_time with the
// `set_storage` host function.
let max_storage_size: u32 = ((max_block_ref_time /
(<RuntimeCosts as gas::Token<T>>::weight(&RuntimeCosts::SetStorage {
new_bytes: max_payload_size,
old_bytes: 0,
})
.ref_time()))
.saturating_mul(max_payload_size.saturating_add(max_key_size) as u64))
.saturating_add(max_immutable_size.into())
.try_into()
.expect("Storage size too big");
let max_pvf_mem: u32 = T::PVFMemory::get();
let storage_size_limit = max_pvf_mem.saturating_sub(max_runtime_mem) / 2;
assert!(
max_storage_size < storage_size_limit,
"Maximal storage size {} exceeds the storage limit {}",
max_storage_size,
storage_size_limit
);
// We can use storage to store events using the available block ref_time with the
// `deposit_event` host function. The overhead of stored events, which is around 100B,
// is not taken into account to simplify calculations, as it does not change much.
let max_events_size: u32 = ((max_block_ref_time /
(<RuntimeCosts as gas::Token<T>>::weight(&RuntimeCosts::DepositEvent {
num_topic: 0,
len: max_payload_size,
})
.ref_time()))
.saturating_mul(max_payload_size as u64))
.try_into()
.expect("Events size too big");
assert!(
max_events_size < storage_size_limit,
"Maximal events size {} exceeds the events limit {}",
max_events_size,
storage_size_limit
);
}
}
#[pallet::call]
impl<T: Config> Pallet<T>
where
BalanceOf<T>: Into<U256> + TryFrom<U256>,
MomentOf<T>: Into<U256>,
T::Hash: frame_support::traits::IsType<H256>,
{
/// A raw EVM transaction, typically dispatched by an Ethereum JSON-RPC server.
///
/// # Parameters
///
/// * `payload`: The encoded [`crate::evm::TransactionSigned`].
/// * `gas_limit`: The gas limit enforced during contract execution.
/// * `storage_deposit_limit`: The maximum balance that can be charged to the caller for
/// storage usage.
///
/// # Note
///
/// This call cannot be dispatched directly; attempting to do so will result in a failed
/// transaction. It serves as a wrapper for an Ethereum transaction. When submitted, the
/// runtime converts it into a [`sp_runtime::generic::CheckedExtrinsic`] by recovering the
/// signer and validating the transaction.
#[allow(unused_variables)]
#[pallet::call_index(0)]
#[pallet::weight(Weight::MAX)]
pub fn eth_transact(
origin: OriginFor<T>,
payload: Vec<u8>,
gas_limit: Weight,
#[pallet::compact] storage_deposit_limit: BalanceOf<T>,
) -> DispatchResultWithPostInfo {
Err(frame_system::Error::CallFiltered::<T>.into())
}
/// Makes a call to an account, optionally transferring some balance.
///
/// # Parameters
///
/// * `dest`: Address of the contract to call.
/// * `value`: The balance to transfer from the `origin` to `dest`.
/// * `gas_limit`: The gas limit enforced when executing the constructor.
/// * `storage_deposit_limit`: The maximum amount of balance that can be charged from the
/// caller to pay for the storage consumed.
/// * `data`: The input data to pass to the contract.
///
/// * If the account is a smart-contract account, the associated code will be
/// executed and any value will be transferred.
/// * If the account is a regular account, any value will be transferred.
/// * If no account exists and the call value is not less than `existential_deposit`,
/// a regular account will be created and any value will be transferred.
#[pallet::call_index(1)]
#[pallet::weight(T::WeightInfo::call().saturating_add(*gas_limit))]
pub fn call(
origin: OriginFor<T>,
dest: H160,
#[pallet::compact] value: BalanceOf<T>,
gas_limit: Weight,
#[pallet::compact] storage_deposit_limit: BalanceOf<T>,
data: Vec<u8>,
) -> DispatchResultWithPostInfo {
log::info!(target: LOG_TARGET, "Call: {:?} {:?} {:?}", dest, value, data);
let mut output = Self::bare_call(
origin,
dest,
value,
gas_limit,
DepositLimit::Balance(storage_deposit_limit),
data,
DebugInfo::Skip,
CollectEvents::Skip,
);
if let Ok(return_value) = &output.result {
if return_value.did_revert() {
output.result = Err(<Error<T>>::ContractReverted.into());
}
}
dispatch_result(output.result, output.gas_consumed, T::WeightInfo::call())
}
/// Instantiates a contract from a previously deployed wasm binary.
///
/// This function is identical to [`Self::instantiate_with_code`] but without the
/// code deployment step. Instead, the `code_hash` of an on-chain deployed wasm binary
/// must be supplied.
#[pallet::call_index(2)]
#[pallet::weight(
T::WeightInfo::instantiate(data.len() as u32).saturating_add(*gas_limit)
)]
pub fn instantiate(
origin: OriginFor<T>,
#[pallet::compact] value: BalanceOf<T>,
gas_limit: Weight,
#[pallet::compact] storage_deposit_limit: BalanceOf<T>,
code_hash: sp_core::H256,
data: Vec<u8>,
salt: Option<[u8; 32]>,
) -> DispatchResultWithPostInfo {
let data_len = data.len() as u32;
let mut output = Self::bare_instantiate(
origin,
value,
gas_limit,
DepositLimit::Balance(storage_deposit_limit),
Code::Existing(code_hash),
data,
salt,
DebugInfo::Skip,
CollectEvents::Skip,
);
if let Ok(retval) = &output.result {
if retval.result.did_revert() {
output.result = Err(<Error<T>>::ContractReverted.into());
}
}
dispatch_result(
output.result.map(|result| result.result),
output.gas_consumed,
T::WeightInfo::instantiate(data_len),
)
}
/// Instantiates a new contract from the supplied `code` optionally transferring
/// some balance.
///
/// This dispatchable has the same effect as calling [`Self::upload_code`] +
/// [`Self::instantiate`]. Bundling them together provides efficiency gains. Please
/// also check the documentation of [`Self::upload_code`].
///
/// # Parameters
///
/// * `value`: The balance to transfer from the `origin` to the newly created contract.
/// * `gas_limit`: The gas limit enforced when executing the constructor.
/// * `storage_deposit_limit`: The maximum amount of balance that can be charged/reserved
/// from the caller to pay for the storage consumed.
/// * `code`: The contract code to deploy in raw bytes.
/// * `data`: The input data to pass to the contract constructor.
/// * `salt`: Used for the address derivation. If `Some` is supplied then `CREATE2`
/// semantics are used. If `None` then `CRATE1` is used.
///
///
/// Instantiation is executed as follows:
///
/// - The supplied `code` is deployed, and a `code_hash` is created for that code.
/// - If the `code_hash` already exists on the chain the underlying `code` will be shared.
/// - The destination address is computed based on the sender, code_hash and the salt.
/// - The smart-contract account is created at the computed address.
/// - The `value` is transferred to the new account.
/// - The `deploy` function is executed in the context of the newly-created account.
#[pallet::call_index(3)]
#[pallet::weight(
T::WeightInfo::instantiate_with_code(code.len() as u32, data.len() as u32)
.saturating_add(*gas_limit)
)]
pub fn instantiate_with_code(
origin: OriginFor<T>,
#[pallet::compact] value: BalanceOf<T>,
gas_limit: Weight,
#[pallet::compact] storage_deposit_limit: BalanceOf<T>,
code: Vec<u8>,
data: Vec<u8>,
salt: Option<[u8; 32]>,
) -> DispatchResultWithPostInfo {
let code_len = code.len() as u32;
let data_len = data.len() as u32;
let mut output = Self::bare_instantiate(
origin,
value,
gas_limit,
DepositLimit::Balance(storage_deposit_limit),
Code::Upload(code),
data,
salt,
DebugInfo::Skip,
CollectEvents::Skip,
);
if let Ok(retval) = &output.result {
if retval.result.did_revert() {
output.result = Err(<Error<T>>::ContractReverted.into());
}
}
dispatch_result(
output.result.map(|result| result.result),
output.gas_consumed,
T::WeightInfo::instantiate_with_code(code_len, data_len),
)
}
/// Upload new `code` without instantiating a contract from it.
///
/// If the code does not already exist a deposit is reserved from the caller
/// and unreserved only when [`Self::remove_code`] is called. The size of the reserve
/// depends on the size of the supplied `code`.
///
/// # Note
///
/// Anyone can instantiate a contract from any uploaded code and thus prevent its removal.
/// To avoid this situation a constructor could employ access control so that it can
/// only be instantiated by permissioned entities. The same is true when uploading
/// through [`Self::instantiate_with_code`].
#[pallet::call_index(4)]
#[pallet::weight(T::WeightInfo::upload_code(code.len() as u32))]
pub fn upload_code(
origin: OriginFor<T>,
code: Vec<u8>,
#[pallet::compact] storage_deposit_limit: BalanceOf<T>,
) -> DispatchResult {
Self::bare_upload_code(origin, code, storage_deposit_limit).map(|_| ())
}
/// Remove the code stored under `code_hash` and refund the deposit to its owner.
///
/// A code can only be removed by its original uploader (its owner) and only if it is
/// not used by any contract.
#[pallet::call_index(5)]
#[pallet::weight(T::WeightInfo::remove_code())]
pub fn remove_code(
origin: OriginFor<T>,
code_hash: sp_core::H256,
) -> DispatchResultWithPostInfo {
let origin = ensure_signed(origin)?;
<WasmBlob<T>>::remove(&origin, code_hash)?;
// we waive the fee because removing unused code is beneficial
Ok(Pays::No.into())
}
/// Privileged function that changes the code of an existing contract.
///
/// This takes care of updating refcounts and all other necessary operations. Returns
/// an error if either the `code_hash` or `dest` do not exist.
///
/// # Note
///
/// This does **not** change the address of the contract in question. This means
/// that the contract address is no longer derived from its code hash after calling
/// this dispatchable.
#[pallet::call_index(6)]
#[pallet::weight(T::WeightInfo::set_code())]
pub fn set_code(
origin: OriginFor<T>,
dest: H160,
code_hash: sp_core::H256,
) -> DispatchResult {
ensure_root(origin)?;
<ContractInfoOf<T>>::try_mutate(&dest, |contract| {
let contract = if let Some(contract) = contract {
contract
} else {
return Err(<Error<T>>::ContractNotFound.into());
};
<ExecStack<T, WasmBlob<T>>>::increment_refcount(code_hash)?;
<ExecStack<T, WasmBlob<T>>>::decrement_refcount(contract.code_hash);
Self::deposit_event(Event::ContractCodeUpdated {
contract: dest,
new_code_hash: code_hash,
old_code_hash: contract.code_hash,
});
contract.code_hash = code_hash;
Ok(())
})
}
/// Register the callers account id so that it can be used in contract interactions.
///
/// This will error if the origin is already mapped or is a eth native `Address20`. It will
/// take a deposit that can be released by calling [`Self::unmap_account`].
#[pallet::call_index(7)]
#[pallet::weight(T::WeightInfo::map_account())]
pub fn map_account(origin: OriginFor<T>) -> DispatchResult {
let origin = ensure_signed(origin)?;
T::AddressMapper::map(&origin)
}
/// Unregister the callers account id in order to free the deposit.
///
/// There is no reason to ever call this function other than freeing up the deposit.
/// This is only useful when the account should no longer be used.
#[pallet::call_index(8)]
#[pallet::weight(T::WeightInfo::unmap_account())]
pub fn unmap_account(origin: OriginFor<T>) -> DispatchResult {
let origin = ensure_signed(origin)?;
T::AddressMapper::unmap(&origin)
}
/// Dispatch an `call` with the origin set to the callers fallback address.
///
/// Every `AccountId32` can control its corresponding fallback account. The fallback account
/// is the `AccountId20` with the last 12 bytes set to `0xEE`. This is essentially a
/// recovery function in case an `AccountId20` was used without creating a mapping first.
#[pallet::call_index(9)]
#[pallet::weight({
let dispatch_info = call.get_dispatch_info();
(
T::WeightInfo::dispatch_as_fallback_account().saturating_add(dispatch_info.call_weight),
dispatch_info.class
)
})]
pub fn dispatch_as_fallback_account(
origin: OriginFor<T>,
call: Box<<T as Config>::RuntimeCall>,
) -> DispatchResultWithPostInfo {
let origin = ensure_signed(origin)?;
let unmapped_account =
T::AddressMapper::to_fallback_account_id(&T::AddressMapper::to_address(&origin));
call.dispatch(RawOrigin::Signed(unmapped_account).into())
}
}
}
/// Create a dispatch result reflecting the amount of consumed gas.
fn dispatch_result<R>(
result: Result<R, DispatchError>,
gas_consumed: Weight,
base_weight: Weight,
) -> DispatchResultWithPostInfo {
let post_info = PostDispatchInfo {
actual_weight: Some(gas_consumed.saturating_add(base_weight)),
pays_fee: Default::default(),
};
result
.map(|_| post_info)
.map_err(|e| DispatchErrorWithPostInfo { post_info, error: e })
}
impl<T: Config> Pallet<T>
where
BalanceOf<T>: Into<U256> + TryFrom<U256> + Bounded,
MomentOf<T>: Into<U256>,
T::Hash: frame_support::traits::IsType<H256>,
{
/// A generalized version of [`Self::call`].
///
/// Identical to [`Self::call`] but tailored towards being called by other code within the
/// runtime as opposed to from an extrinsic. It returns more information and allows the
/// enablement of features that are not suitable for an extrinsic (debugging, event
/// collection).
pub fn bare_call(
origin: OriginFor<T>,
dest: H160,
value: BalanceOf<T>,
gas_limit: Weight,
storage_deposit_limit: DepositLimit<BalanceOf<T>>,
data: Vec<u8>,
debug: DebugInfo,
collect_events: CollectEvents,
) -> ContractResult<ExecReturnValue, BalanceOf<T>, EventRecordOf<T>> {
let mut gas_meter = GasMeter::new(gas_limit);
let mut storage_deposit = Default::default();
let mut debug_message = if matches!(debug, DebugInfo::UnsafeDebug) {
Some(DebugBuffer::default())
} else {
None
};
let try_call = || {
let origin = Origin::from_runtime_origin(origin)?;
let mut storage_meter = match storage_deposit_limit {
DepositLimit::Balance(limit) => StorageMeter::new(&origin, limit, value)?,
DepositLimit::Unchecked => StorageMeter::new_unchecked(BalanceOf::<T>::max_value()),
};
let result = ExecStack::<T, WasmBlob<T>>::run_call(
origin.clone(),
dest,
&mut gas_meter,
&mut storage_meter,
Self::convert_native_to_evm(value),
data,
storage_deposit_limit.is_unchecked(),
debug_message.as_mut(),
)?;
storage_deposit = storage_meter
.try_into_deposit(&origin, storage_deposit_limit.is_unchecked())
.inspect_err(|err| {
log::error!(target: LOG_TARGET, "Failed to transfer deposit: {err:?}");
})?;
Ok(result)
};
let result = Self::run_guarded(try_call);
let events = if matches!(collect_events, CollectEvents::UnsafeCollect) {
Some(System::<T>::read_events_no_consensus().map(|e| *e).collect())
} else {
None
};
ContractResult {
result: result.map_err(|r| r.error),
gas_consumed: gas_meter.gas_consumed(),
gas_required: gas_meter.gas_required(),
storage_deposit,
debug_message: debug_message.unwrap_or_default().to_vec(),
events,
}
}
/// A generalized version of [`Self::instantiate`] or [`Self::instantiate_with_code`].
///
/// Identical to [`Self::instantiate`] or [`Self::instantiate_with_code`] but tailored towards
/// being called by other code within the runtime as opposed to from an extrinsic. It returns
/// more information and allows the enablement of features that are not suitable for an
/// extrinsic (debugging, event collection).
pub fn bare_instantiate(
origin: OriginFor<T>,
value: BalanceOf<T>,
gas_limit: Weight,
storage_deposit_limit: DepositLimit<BalanceOf<T>>,
code: Code,
data: Vec<u8>,
salt: Option<[u8; 32]>,
debug: DebugInfo,
collect_events: CollectEvents,
) -> ContractResult<InstantiateReturnValue, BalanceOf<T>, EventRecordOf<T>> {
let mut gas_meter = GasMeter::new(gas_limit);
let mut storage_deposit = Default::default();
let mut debug_message =
if debug == DebugInfo::UnsafeDebug { Some(DebugBuffer::default()) } else { None };
let unchecked_deposit_limit = storage_deposit_limit.is_unchecked();
let mut storage_deposit_limit = match storage_deposit_limit {
DepositLimit::Balance(limit) => limit,
DepositLimit::Unchecked => BalanceOf::<T>::max_value(),
};
let try_instantiate = || {
let instantiate_account = T::InstantiateOrigin::ensure_origin(origin.clone())?;
let (executable, upload_deposit) = match code {
Code::Upload(code) => {
let upload_account = T::UploadOrigin::ensure_origin(origin)?;
let (executable, upload_deposit) = Self::try_upload_code(
upload_account,
code,
storage_deposit_limit,
unchecked_deposit_limit,
)?;
storage_deposit_limit.saturating_reduce(upload_deposit);
(executable, upload_deposit)
},
Code::Existing(code_hash) =>
(WasmBlob::from_storage(code_hash, &mut gas_meter)?, Default::default()),
};
let instantiate_origin = Origin::from_account_id(instantiate_account.clone());
let mut storage_meter = if unchecked_deposit_limit {
StorageMeter::new_unchecked(storage_deposit_limit)
} else {
StorageMeter::new(&instantiate_origin, storage_deposit_limit, value)?
};
let result = ExecStack::<T, WasmBlob<T>>::run_instantiate(
instantiate_account,
executable,
&mut gas_meter,
&mut storage_meter,
Self::convert_native_to_evm(value),
data,
salt.as_ref(),
unchecked_deposit_limit,
debug_message.as_mut(),
);
storage_deposit = storage_meter
.try_into_deposit(&instantiate_origin, unchecked_deposit_limit)?
.saturating_add(&StorageDeposit::Charge(upload_deposit));
result
};
let output = Self::run_guarded(try_instantiate);
let events = if matches!(collect_events, CollectEvents::UnsafeCollect) {
Some(System::<T>::read_events_no_consensus().map(|e| *e).collect())
} else {
None
};
ContractResult {
result: output
.map(|(addr, result)| InstantiateReturnValue { result, addr })
.map_err(|e| e.error),
gas_consumed: gas_meter.gas_consumed(),
gas_required: gas_meter.gas_required(),
storage_deposit,
debug_message: debug_message.unwrap_or_default().to_vec(),
events,
}
}
/// A version of [`Self::eth_transact`] used to dry-run Ethereum calls.
///
/// # Parameters
///
/// - `tx`: The Ethereum transaction to simulate.
/// - `gas_limit`: The gas limit enforced during contract execution.
/// - `utx_encoded_size`: A function that takes a call and returns the encoded size of the
/// unchecked extrinsic.
pub fn bare_eth_transact(
mut tx: GenericTransaction,
gas_limit: Weight,
utx_encoded_size: impl Fn(Call<T>) -> u32,
) -> Result<EthTransactInfo<BalanceOf<T>>, EthTransactError>
where
T: pallet_transaction_payment::Config,
<T as frame_system::Config>::RuntimeCall:
Dispatchable<Info = frame_support::dispatch::DispatchInfo>,
<T as Config>::RuntimeCall: From<crate::Call<T>>,
<T as Config>::RuntimeCall: Encode,
OnChargeTransactionBalanceOf<T>: Into<BalanceOf<T>>,
T::Nonce: Into<U256>,
T::Hash: frame_support::traits::IsType<H256>,
{
log::debug!(target: LOG_TARGET, "bare_eth_transact: tx: {tx:?} gas_limit: {gas_limit:?}");
let from = tx.from.unwrap_or_default();
let origin = T::AddressMapper::to_account_id(&from);
let storage_deposit_limit = if tx.gas.is_some() {
DepositLimit::Balance(BalanceOf::<T>::max_value())
} else {
DepositLimit::Unchecked
};
// TODO remove once we have revisited how we encode the gas limit.
if tx.nonce.is_none() {
tx.nonce = Some(<System<T>>::account_nonce(&origin).into());
}
if tx.gas_price.is_none() {
tx.gas_price = Some(GAS_PRICE.into());
}
if tx.chain_id.is_none() {
tx.chain_id = Some(T::ChainId::get().into());
}
// Convert the value to the native balance type.
let evm_value = tx.value.unwrap_or_default();
let native_value = match Self::convert_evm_to_native(evm_value) {
Ok(v) => v,
Err(_) => return Err(EthTransactError::Message("Failed to convert value".into())),
};
let input = tx.input.clone().unwrap_or_default().0;
let debug = DebugInfo::Skip;
let collect_events = CollectEvents::Skip;
let extract_error = |err| {
if err == Error::<T>::TransferFailed.into() ||
err == Error::<T>::StorageDepositNotEnoughFunds.into() ||
err == Error::<T>::StorageDepositLimitExhausted.into()
{
let balance = Self::evm_balance(&from);
return Err(EthTransactError::Message(
format!("insufficient funds for gas * price + value: address {from:?} have {balance} (supplied gas {})",
tx.gas.unwrap_or_default()))
);
}
return Err(EthTransactError::Message(format!(
"Failed to instantiate contract: {err:?}"
)));
};
// Dry run the call
let (mut result, dispatch_info) = match tx.to {
// A contract call.
Some(dest) => {
// Dry run the call.
let result = crate::Pallet::<T>::bare_call(
T::RuntimeOrigin::signed(origin),
dest,
native_value,
gas_limit,
storage_deposit_limit,
input.clone(),
debug,
collect_events,
);
let data = match result.result {
Ok(return_value) => {
if return_value.did_revert() {
return Err(EthTransactError::Data(return_value.data));
}
return_value.data
},
Err(err) => {
log::debug!(target: LOG_TARGET, "Failed to execute call: {err:?}");
return extract_error(err)
},
};
let result = EthTransactInfo {
gas_required: result.gas_required,
storage_deposit: result.storage_deposit.charge_or_zero(),
data,
eth_gas: Default::default(),
};
// Get the dispatch info of the call.
let dispatch_call: <T as Config>::RuntimeCall = crate::Call::<T>::call {
dest,
value: native_value,
gas_limit: result.gas_required,
storage_deposit_limit: result.storage_deposit,
data: input.clone(),
}
.into();
(result, dispatch_call.get_dispatch_info())
},
// A contract deployment
None => {
// Extract code and data from the input.
let (code, data) = match polkavm::ProgramBlob::blob_length(&input) {
Some(blob_len) => blob_len
.try_into()
.ok()
.and_then(|blob_len| (input.split_at_checked(blob_len)))
.unwrap_or_else(|| (&input[..], &[][..])),
_ => {
log::debug!(target: LOG_TARGET, "Failed to extract polkavm blob length");
(&input[..], &[][..])
},
};
// Dry run the call.
let result = crate::Pallet::<T>::bare_instantiate(
T::RuntimeOrigin::signed(origin),
native_value,
gas_limit,
storage_deposit_limit,
Code::Upload(code.to_vec()),
data.to_vec(),
None,
debug,
collect_events,
);
let returned_data = match result.result {
Ok(return_value) => {
if return_value.result.did_revert() {
return Err(EthTransactError::Data(return_value.result.data));
}
return_value.result.data
},
Err(err) => {
log::debug!(target: LOG_TARGET, "Failed to instantiate: {err:?}");
return extract_error(err)
},
};
let result = EthTransactInfo {
gas_required: result.gas_required,
storage_deposit: result.storage_deposit.charge_or_zero(),
data: returned_data,
eth_gas: Default::default(),
};
// Get the dispatch info of the call.
let dispatch_call: <T as Config>::RuntimeCall =
crate::Call::<T>::instantiate_with_code {
value: native_value,
gas_limit: result.gas_required,
storage_deposit_limit: result.storage_deposit,
code: code.to_vec(),
data: data.to_vec(),
salt: None,
}
.into();
(result, dispatch_call.get_dispatch_info())
},
};
// The transaction fees depend on the extrinsic's length, which in turn is influenced by
// the encoded length of the gas limit specified in the transaction (tx.gas).
// We iteratively compute the fee by adjusting tx.gas until the fee stabilizes.
// with a maximum of 3 iterations to avoid an infinite loop.
for _ in 0..3 {
let Ok(unsigned_tx) = tx.clone().try_into_unsigned() else {
log::debug!(target: LOG_TARGET, "Failed to convert to unsigned");
return Err(EthTransactError::Message("Invalid transaction".into()));
};
let eth_dispatch_call = crate::Call::<T>::eth_transact {
payload: unsigned_tx.dummy_signed_payload(),
gas_limit: result.gas_required,
storage_deposit_limit: result.storage_deposit,
};
let encoded_len = utx_encoded_size(eth_dispatch_call);
let fee = pallet_transaction_payment::Pallet::<T>::compute_fee(
encoded_len,
&dispatch_info,
0u32.into(),
)
.into();
let eth_gas: U256 = (fee / GAS_PRICE.into()).into();
if eth_gas == result.eth_gas {
log::trace!(target: LOG_TARGET, "bare_eth_call: encoded_len: {encoded_len:?} eth_gas: {eth_gas:?}");
break;
}
result.eth_gas = eth_gas;
tx.gas = Some(eth_gas.into());
log::debug!(target: LOG_TARGET, "Adjusting Eth gas to: {eth_gas:?}");
}
Ok(result)
}
/// Get the balance with EVM decimals of the given `address`.
pub fn evm_balance(address: &H160) -> U256 {
let account = T::AddressMapper::to_account_id(&address);
Self::convert_native_to_evm(T::Currency::reducible_balance(&account, Preserve, Polite))
}
/// A generalized version of [`Self::upload_code`].
///
/// It is identical to [`Self::upload_code`] and only differs in the information it returns.
pub fn bare_upload_code(
origin: OriginFor<T>,
code: Vec<u8>,
storage_deposit_limit: BalanceOf<T>,
) -> CodeUploadResult<BalanceOf<T>> {
let origin = T::UploadOrigin::ensure_origin(origin)?;
let (module, deposit) = Self::try_upload_code(origin, code, storage_deposit_limit, false)?;
Ok(CodeUploadReturnValue { code_hash: *module.code_hash(), deposit })
}
/// Query storage of a specified contract under a specified key.
pub fn get_storage(address: H160, key: [u8; 32]) -> GetStorageResult {
let contract_info =
ContractInfoOf::<T>::get(&address).ok_or(ContractAccessError::DoesntExist)?;
let maybe_value = contract_info.read(&Key::from_fixed(key));
Ok(maybe_value)
}
/// Uploads new code and returns the Wasm blob and deposit amount collected.
fn try_upload_code(
origin: T::AccountId,
code: Vec<u8>,
storage_deposit_limit: BalanceOf<T>,
skip_transfer: bool,
) -> Result<(WasmBlob<T>, BalanceOf<T>), DispatchError> {
let mut module = WasmBlob::from_code(code, origin)?;
let deposit = module.store_code(skip_transfer)?;
ensure!(storage_deposit_limit >= deposit, <Error<T>>::StorageDepositLimitExhausted);
Ok((module, deposit))
}
/// Run the supplied function `f` if no other instance of this pallet is on the stack.
fn run_guarded<R, F: FnOnce() -> Result<R, ExecError>>(f: F) -> Result<R, ExecError> {
executing_contract::using_once(&mut false, || {
executing_contract::with(|f| {
// Fail if already entered contract execution
if *f {
return Err(())
}
// We are entering contract execution
*f = true;
Ok(())
})
.expect("Returns `Ok` if called within `using_once`. It is syntactically obvious that this is the case; qed")
.map_err(|_| <Error<T>>::ReenteredPallet.into())
.map(|_| f())
.and_then(|r| r)
})
}
/// Convert a native balance to EVM balance.
fn convert_native_to_evm(value: BalanceOf<T>) -> U256 {
value.into().saturating_mul(T::NativeToEthRatio::get().into())
}
/// Convert an EVM balance to a native balance.
fn convert_evm_to_native(value: U256) -> Result<BalanceOf<T>, Error<T>> {
if value.is_zero() {
return Ok(Zero::zero())
}
let ratio = T::NativeToEthRatio::get().into();
let res = value.checked_div(ratio).expect("divisor is non-zero; qed");
if res.saturating_mul(ratio) == value {
res.try_into().map_err(|_| Error::<T>::BalanceConversionFailed)
} else {
Err(Error::<T>::DecimalPrecisionLoss)
}
}
}
impl<T: Config> Pallet<T> {
/// Return the existential deposit of [`Config::Currency`].
fn min_balance() -> BalanceOf<T> {
<T::Currency as Inspect<AccountIdOf<T>>>::minimum_balance()
}
/// Deposit a pallet contracts event.
fn deposit_event(event: Event<T>) {
<frame_system::Pallet<T>>::deposit_event(<T as Config>::RuntimeEvent::from(event))
}
}
// Set up a global reference to the boolean flag used for the re-entrancy guard.
environmental!(executing_contract: bool);
sp_api::decl_runtime_apis! {
/// The API used to dry-run contract interactions.
#[api_version(1)]
pub trait ReviveApi<AccountId, Balance, Nonce, BlockNumber, EventRecord> where
AccountId: Codec,
Balance: Codec,
Nonce: Codec,
BlockNumber: Codec,
EventRecord: Codec,
{
/// Returns the free balance of the given `[H160]` address, using EVM decimals.
fn balance(address: H160) -> U256;
/// Returns the nonce of the given `[H160]` address.
fn nonce(address: H160) -> Nonce;
/// Perform a call from a specified account to a given contract.
///
/// See [`crate::Pallet::bare_call`].
fn call(
origin: AccountId,
dest: H160,
value: Balance,
gas_limit: Option<Weight>,
storage_deposit_limit: Option<Balance>,
input_data: Vec<u8>,
) -> ContractResult<ExecReturnValue, Balance, EventRecord>;
/// Instantiate a new contract.
///
/// See `[crate::Pallet::bare_instantiate]`.
fn instantiate(
origin: AccountId,
value: Balance,
gas_limit: Option<Weight>,
storage_deposit_limit: Option<Balance>,
code: Code,
data: Vec<u8>,
salt: Option<[u8; 32]>,
) -> ContractResult<InstantiateReturnValue, Balance, EventRecord>;
/// Perform an Ethereum call.
///
/// See [`crate::Pallet::bare_eth_transact`]
fn eth_transact(tx: GenericTransaction) -> Result<EthTransactInfo<Balance>, EthTransactError>;
/// Upload new code without instantiating a contract from it.
///
/// See [`crate::Pallet::bare_upload_code`].
fn upload_code(
origin: AccountId,
code: Vec<u8>,
storage_deposit_limit: Option<Balance>,
) -> CodeUploadResult<Balance>;
/// Query a given storage key in a given contract.
///
/// Returns `Ok(Some(Vec<u8>))` if the storage value exists under the given key in the
/// specified account and `Ok(None)` if it doesn't. If the account specified by the address
/// doesn't exist, or doesn't have a contract then `Err` is returned.
fn get_storage(
address: H160,
key: [u8; 32],
) -> GetStorageResult;
}
}