forked from ghostchain/ghost-node
1211 lines
42 KiB
Rust
1211 lines
42 KiB
Rust
// Ensure we're `no_std` when compiling for Wasm.
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#![cfg_attr(not(feature = "std"), no_std)]
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use codec::{Decode, Encode, MaxEncodedLen};
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use scale_info::TypeInfo;
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use serde::{Deserialize, Deserializer};
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use frame_support::{
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pallet_prelude::*,
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traits::{
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tokens::fungible::{Inspect, Mutate},
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DisabledValidators, Get, OneSessionHandler, ValidatorSet, ValidatorSetWithIdentification,
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},
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WeakBoundedVec,
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};
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use frame_system::{
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offchain::{SendTransactionTypes, SubmitTransaction},
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pallet_prelude::*,
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};
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pub use pallet::*;
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use sp_core::H256;
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use sp_runtime::{
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offchain::{
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self as rt_offchain,
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storage::StorageValueRef,
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storage_lock::{StorageLock, Time},
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HttpError,
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},
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traits::{BlockNumberProvider, Convert, Saturating, TrailingZeroInput},
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Perbill, RuntimeAppPublic, RuntimeDebug,
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};
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use sp_staking::{
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offence::{Kind, Offence, ReportOffence},
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SessionIndex,
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};
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use sp_std::{collections::btree_map::BTreeMap, prelude::*, vec::Vec};
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use ghost_networks::{
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NetworkData, NetworkDataBasicHandler, NetworkDataInspectHandler, NetworkDataMutateHandler,
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NetworkType,
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};
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pub mod weights;
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pub use crate::weights::WeightInfo;
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mod benchmarking;
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mod mock;
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mod tests;
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mod deserialisations;
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mod evm_types;
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use evm_types::{EvmResponse, EvmResponseType};
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pub mod sr25519 {
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mod app_sr25519 {
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use sp_application_crypto::{app_crypto, sr25519, KeyTypeId};
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const SLOW_CLAP: KeyTypeId = KeyTypeId(*b"slow");
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app_crypto!(sr25519, SLOW_CLAP);
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}
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sp_application_crypto::with_pair! {
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pub type AuthorityPair = app_sr25519::Pair;
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}
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pub type AuthoritySignature = app_sr25519::Signature;
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pub type AuthorityId = app_sr25519::Public;
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}
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const LOG_TARGET: &str = "runtime::ghost-slow-clap";
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const DB_PREFIX: &[u8] = b"slow_clap::";
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const MIN_LOCK_GUARD_PERIOD: u64 = 15_000;
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const FETCH_TIMEOUT_PERIOD: u64 = 3_000;
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const LOCK_BLOCK_EXPIRATION: u64 = 20;
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const COMMITMENT_DELAY_MILLIS: u64 = 600_000;
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pub type AuthIndex = u32;
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#[derive(
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RuntimeDebug,
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Default,
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Copy,
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Clone,
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Eq,
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PartialEq,
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Ord,
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PartialOrd,
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Encode,
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Decode,
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TypeInfo,
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MaxEncodedLen,
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)]
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pub struct CommitmentDetails {
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pub last_registered_block: u64,
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pub last_seen_block: u64,
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pub last_updated: u64,
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}
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#[derive(
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RuntimeDebug, Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, TypeInfo, MaxEncodedLen,
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)]
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pub struct BlockCommitment<NetworkId> {
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pub session_index: SessionIndex,
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pub authority_index: AuthIndex,
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pub network_id: NetworkId,
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pub commitment: CommitmentDetails,
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}
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#[derive(
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RuntimeDebug, Clone, Eq, PartialEq, Ord, PartialOrd, Encode, Decode, TypeInfo, MaxEncodedLen,
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)]
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pub struct Clap<AccountId, NetworkId, Balance> {
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pub session_index: SessionIndex,
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pub authority_index: AuthIndex,
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pub transaction_hash: H256,
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pub block_number: u64,
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pub removed: bool,
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pub network_id: NetworkId,
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pub receiver: AccountId,
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pub amount: Balance,
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}
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#[derive(Default, Clone, Copy, PartialEq, Encode, Decode, RuntimeDebug, TypeInfo)]
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pub struct SessionAuthorityInfo {
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pub claps: u32,
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pub disabled: bool,
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}
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#[cfg_attr(test, derive(PartialEq))]
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enum OffchainErr<NetworkId> {
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HttpJsonParsingError,
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HttpBytesParsingError,
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HttpRequestError(HttpError),
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RequestUncompleted,
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HttpResponseNotOk(u16),
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ErrorInEvmResponse,
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NoStoredNetworks,
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NoEndpointAvailable(NetworkId),
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StorageRetrievalError(NetworkId),
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UtxoNotImplemented(NetworkId),
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UnknownNetworkType(NetworkId),
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OffchainTimeoutPeriod(NetworkId),
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}
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impl<NetworkId: core::fmt::Debug> core::fmt::Debug for OffchainErr<NetworkId> {
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fn fmt(&self, fmt: &mut core::fmt::Formatter) -> core::fmt::Result {
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match *self {
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OffchainErr::HttpJsonParsingError => {
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write!(fmt, "Failed to parse evm response as JSON.")
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}
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OffchainErr::HttpBytesParsingError => {
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write!(fmt, "Failed to parse evm response as bytes.")
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}
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OffchainErr::HttpRequestError(http_error) => match http_error {
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HttpError::DeadlineReached => write!(
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fmt,
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"Requested action couldn't been completed within a deadline."
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),
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HttpError::IoError => {
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write!(fmt, "There was an IO error while processing the request.")
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}
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HttpError::Invalid => {
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write!(fmt, "The ID of the request is invalid in this context.")
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}
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},
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OffchainErr::StorageRetrievalError(ref network_id) => write!(
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fmt,
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"Storage value found for network #{:?} but it's undecodable.",
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network_id
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),
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OffchainErr::RequestUncompleted => write!(fmt, "Failed to complete request."),
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OffchainErr::HttpResponseNotOk(code) => {
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write!(fmt, "Http response returned code {:?}.", code)
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}
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OffchainErr::ErrorInEvmResponse => write!(fmt, "Error in evm reponse."),
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OffchainErr::NoStoredNetworks => {
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write!(fmt, "No networks stored for the offchain slow claps.")
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}
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OffchainErr::NoEndpointAvailable(ref network_id) => write!(
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fmt,
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"No RPC endpoint available for network #{:?}.",
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network_id
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),
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OffchainErr::UtxoNotImplemented(ref network_id) => write!(
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fmt,
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"Network #{:?} is marked as UTXO, which is not implemented yet.",
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network_id
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),
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OffchainErr::UnknownNetworkType(ref network_id) => {
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write!(fmt, "Unknown type for network #{:?}.", network_id)
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}
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OffchainErr::OffchainTimeoutPeriod(ref network_id) => write!(
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fmt,
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"Offchain request should be in-flight for network #{:?}.",
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network_id
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),
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}
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}
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}
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pub type NetworkIdOf<T> = <<T as Config>::NetworkDataHandler as NetworkDataBasicHandler>::NetworkId;
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pub type BalanceOf<T> =
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<<T as Config>::Currency as Inspect<<T as frame_system::Config>::AccountId>>::Balance;
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pub type ValidatorId<T> = <<T as Config>::ValidatorSet as ValidatorSet<
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<T as frame_system::Config>::AccountId,
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>>::ValidatorId;
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pub type IdentificationTuple<T> = (
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ValidatorId<T>,
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<<T as Config>::ValidatorSet as ValidatorSetWithIdentification<
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<T as frame_system::Config>::AccountId,
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>>::Identification,
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);
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type OffchainResult<T, A> = Result<A, OffchainErr<NetworkIdOf<T>>>;
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#[frame_support::pallet]
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pub mod pallet {
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use super::*;
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const STORAGE_VERSION: StorageVersion = StorageVersion::new(2);
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#[pallet::pallet]
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#[pallet::storage_version(STORAGE_VERSION)]
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#[pallet::without_storage_info]
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pub struct Pallet<T>(_);
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#[pallet::config]
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pub trait Config: SendTransactionTypes<Call<Self>> + frame_system::Config {
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type RuntimeEvent: From<Event<Self>> + IsType<<Self as frame_system::Config>::RuntimeEvent>;
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type AuthorityId: Member
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+ Parameter
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+ RuntimeAppPublic
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+ Ord
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+ MaybeSerializeDeserialize
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+ MaxEncodedLen;
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type ValidatorSet: ValidatorSetWithIdentification<Self::AccountId>;
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type Currency: Inspect<Self::AccountId> + Mutate<Self::AccountId>;
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type NetworkDataHandler: NetworkDataBasicHandler
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+ NetworkDataInspectHandler<NetworkData>
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+ NetworkDataMutateHandler<NetworkData, BalanceOf<Self>>;
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type BlockNumberProvider: BlockNumberProvider<BlockNumber = BlockNumberFor<Self>>;
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type ReportUnresponsiveness: ReportOffence<
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Self::AccountId,
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IdentificationTuple<Self>,
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ThrottlingOffence<IdentificationTuple<Self>>,
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>;
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type DisabledValidators: DisabledValidators;
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#[pallet::constant]
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type MaxAuthorities: Get<u32>;
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#[pallet::constant]
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type ApplauseThreshold: Get<u32>;
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#[pallet::constant]
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type OffenceThreshold: Get<u32>;
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#[pallet::constant]
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type UnsignedPriority: Get<TransactionPriority>;
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#[pallet::constant]
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type HistoryDepth: Get<SessionIndex>;
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#[pallet::constant]
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type MinAuthoritiesNumber: Get<u32>;
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type WeightInfo: WeightInfo;
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}
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#[pallet::event]
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#[pallet::generate_deposit(pub(super) fn deposit_event)]
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pub enum Event<T: Config> {
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BlackSwan,
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AuthoritiesEquilibrium,
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SomeAuthoritiesTrottling {
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throttling: Vec<IdentificationTuple<T>>,
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},
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Clapped {
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authority_id: AuthIndex,
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network_id: NetworkIdOf<T>,
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transaction_hash: H256,
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receiver: T::AccountId,
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amount: BalanceOf<T>,
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},
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Applaused {
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network_id: NetworkIdOf<T>,
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receiver: T::AccountId,
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received_amount: BalanceOf<T>,
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},
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BlockCommited {
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authority_id: AuthIndex,
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network_id: NetworkIdOf<T>,
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},
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}
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#[pallet::error]
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pub enum Error<T> {
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NotEnoughClaps,
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AlreadyClapped,
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UnregisteredClapRemove,
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TooMuchAuthorities,
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CouldNotAccumulateCommission,
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CouldNotAccumulateIncomingImbalance,
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CouldNotIncreaseGatekeeperAmount,
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NonExistentAuthorityIndex,
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TimeWentBackwards,
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}
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#[pallet::storage]
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#[pallet::getter(fn block_commitments)]
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pub(super) type BlockCommitments<T: Config> = StorageMap<
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_,
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Twox64Concat,
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NetworkIdOf<T>,
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BTreeMap<AuthIndex, CommitmentDetails>,
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ValueQuery,
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>;
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#[pallet::storage]
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#[pallet::getter(fn received_claps)]
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pub(super) type ReceivedClaps<T: Config> = StorageNMap<
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_,
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(
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NMapKey<Twox64Concat, SessionIndex>,
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NMapKey<Twox64Concat, H256>,
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NMapKey<Twox64Concat, H256>,
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),
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BoundedBTreeSet<AuthIndex, T::MaxAuthorities>,
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ValueQuery,
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>;
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#[pallet::storage]
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#[pallet::getter(fn applauses_for_transaction)]
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pub(super) type ApplausesForTransaction<T: Config> = StorageNMap<
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_,
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(
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NMapKey<Twox64Concat, SessionIndex>,
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NMapKey<Twox64Concat, H256>,
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NMapKey<Twox64Concat, H256>,
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),
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bool,
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ValueQuery,
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>;
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#[pallet::storage]
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#[pallet::getter(fn claps_in_session)]
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pub(super) type ClapsInSession<T: Config> = StorageMap<
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_,
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Twox64Concat,
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SessionIndex,
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BTreeMap<AuthIndex, SessionAuthorityInfo>,
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ValueQuery,
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>;
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#[pallet::storage]
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#[pallet::getter(fn authorities)]
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pub(super) type Authorities<T: Config> = StorageMap<
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_,
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Twox64Concat,
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SessionIndex,
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WeakBoundedVec<T::AuthorityId, T::MaxAuthorities>,
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ValueQuery,
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>;
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#[pallet::storage]
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#[pallet::getter(fn validators)]
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pub(super) type Validators<T: Config> = StorageMap<
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_,
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Twox64Concat,
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SessionIndex,
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WeakBoundedVec<ValidatorId<T>, T::MaxAuthorities>,
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OptionQuery,
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>;
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#[pallet::genesis_config]
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#[derive(frame_support::DefaultNoBound)]
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pub struct GenesisConfig<T: Config> {
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pub authorities: Vec<T::AuthorityId>,
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}
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#[pallet::genesis_build]
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impl<T: Config> BuildGenesisConfig for GenesisConfig<T> {
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fn build(&self) {
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if !self.authorities.is_empty() {
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Pallet::<T>::initialize_authorities(self.authorities.clone());
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}
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}
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}
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#[pallet::call]
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impl<T: Config> Pallet<T> {
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#[pallet::call_index(0)]
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#[pallet::weight((T::WeightInfo::slow_clap(), DispatchClass::Normal, Pays::No))]
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pub fn slow_clap(
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origin: OriginFor<T>,
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clap: Clap<T::AccountId, NetworkIdOf<T>, BalanceOf<T>>,
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// since signature verification is done in `validate_unsigned`
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// we can skip doing it here again.
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_signature: <T::AuthorityId as RuntimeAppPublic>::Signature,
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) -> DispatchResult {
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ensure_none(origin)?;
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Self::try_slow_clap(&clap)?;
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Ok(())
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}
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#[pallet::call_index(1)]
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#[pallet::weight((T::WeightInfo::commit_block(), DispatchClass::Normal, Pays::No))]
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pub fn commit_block(
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origin: OriginFor<T>,
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block_commitment: BlockCommitment<NetworkIdOf<T>>,
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// since signature verification is done in `validate_unsigned`
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// we can skip doing it here again.
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_signature: <T::AuthorityId as RuntimeAppPublic>::Signature,
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) -> DispatchResult {
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ensure_none(origin)?;
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Self::try_commit_block(&block_commitment)?;
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Ok(())
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}
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}
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#[pallet::hooks]
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impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
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fn offchain_worker(now: BlockNumberFor<T>) {
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if let Err(e) = Self::start_slow_clapping(now) {
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log::info!(
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target: LOG_TARGET,
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"👏 Skipping slow clap at {:?}: {:?}",
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now,
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e,
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)
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}
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}
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}
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#[pallet::validate_unsigned]
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impl<T: Config> ValidateUnsigned for Pallet<T> {
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type Call = Call<T>;
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fn validate_unsigned(_source: TransactionSource, call: &Self::Call) -> TransactionValidity {
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match call {
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Call::commit_block {
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block_commitment,
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signature,
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} => {
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let authorities = Authorities::<T>::get(&block_commitment.session_index);
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let authority = match authorities.get(block_commitment.authority_index as usize)
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{
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Some(authority) => authority,
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None => return InvalidTransaction::BadSigner.into(),
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};
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let signature_valid = block_commitment.using_encoded(|encoded_commitment| {
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authority.verify(&encoded_commitment, signature)
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});
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if !signature_valid {
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return InvalidTransaction::BadProof.into();
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}
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|
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ValidTransaction::with_tag_prefix("SlowClap")
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.priority(T::UnsignedPriority::get())
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.and_provides(block_commitment.commitment.encode())
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.longevity(LOCK_BLOCK_EXPIRATION)
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.propagate(true)
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.build()
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}
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Call::slow_clap { clap, signature } => {
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let (session_index, _) = Self::mended_session_index(&clap);
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let authorities = Authorities::<T>::get(&session_index);
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let authority = match authorities.get(clap.authority_index as usize) {
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Some(authority) => authority,
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None => return InvalidTransaction::BadSigner.into(),
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};
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if ClapsInSession::<T>::get(&session_index)
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.get(&clap.authority_index)
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.map(|info| info.disabled)
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|
.unwrap_or_default()
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|
{
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|
return InvalidTransaction::BadSigner.into();
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|
}
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|
|
|
let signature_valid = clap
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|
.using_encoded(|encoded_clap| authority.verify(&encoded_clap, signature));
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|
|
|
if !signature_valid {
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|
return InvalidTransaction::BadProof.into();
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|
}
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|
|
|
ValidTransaction::with_tag_prefix("SlowClap")
|
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.priority(T::UnsignedPriority::get())
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|
.and_provides(signature)
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.longevity(LOCK_BLOCK_EXPIRATION)
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.propagate(true)
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.build()
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}
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_ => InvalidTransaction::Call.into(),
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}
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}
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}
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|
}
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|
|
|
impl<T: Config> Pallet<T> {
|
|
fn create_storage_key(first: &[u8], second: &[u8]) -> Vec<u8> {
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|
let mut key = DB_PREFIX.to_vec();
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key.extend(first);
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key.extend(second);
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key
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|
}
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|
|
|
fn read_persistent_offchain_storage<R: codec::Decode>(
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storage_key: &[u8],
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|
default_value: R,
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|
) -> R {
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|
StorageValueRef::persistent(&storage_key)
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|
.get::<R>()
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|
.ok()
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|
.flatten()
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|
.unwrap_or(default_value)
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|
}
|
|
|
|
fn generate_unique_hash(
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|
receiver: &T::AccountId,
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|
amount: &BalanceOf<T>,
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|
network_id: &NetworkIdOf<T>,
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|
) -> H256 {
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|
let mut clap_args_str = receiver.encode();
|
|
clap_args_str.extend(&amount.encode());
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|
clap_args_str.extend(&network_id.encode());
|
|
|
|
H256::from_slice(&sp_io::hashing::keccak_256(&clap_args_str)[..])
|
|
}
|
|
|
|
fn u64_to_hexadecimal_bytes(value: u64) -> Vec<u8> {
|
|
let mut hex_str = Vec::new();
|
|
hex_str.push(b'0');
|
|
hex_str.push(b'x');
|
|
|
|
if value == 0 {
|
|
hex_str.push(b'0');
|
|
return hex_str;
|
|
}
|
|
|
|
for i in (0..16).rev() {
|
|
let nibble = (value >> (i * 4)) & 0xF;
|
|
if nibble != 0 || hex_str.len() > 2 {
|
|
hex_str.push(match nibble {
|
|
0..=9 => b'0' + nibble as u8,
|
|
10..=15 => b'a' + (nibble - 10) as u8,
|
|
_ => unreachable!(),
|
|
});
|
|
}
|
|
}
|
|
|
|
hex_str
|
|
}
|
|
|
|
fn mended_session_index(
|
|
clap: &Clap<T::AccountId, NetworkIdOf<T>, BalanceOf<T>>,
|
|
) -> (SessionIndex, H256) {
|
|
let prev_session_index = clap.session_index.saturating_sub(1);
|
|
let clap_unique_hash =
|
|
Self::generate_unique_hash(&clap.receiver, &clap.amount, &clap.network_id);
|
|
|
|
let received_claps_key = (
|
|
prev_session_index,
|
|
&clap.transaction_hash,
|
|
&clap_unique_hash,
|
|
);
|
|
|
|
let session_index = ReceivedClaps::<T>::get(&received_claps_key)
|
|
.is_empty()
|
|
.then(|| clap.session_index)
|
|
.unwrap_or(prev_session_index);
|
|
|
|
(session_index, clap_unique_hash)
|
|
}
|
|
|
|
fn try_slow_clap(clap: &Clap<T::AccountId, NetworkIdOf<T>, BalanceOf<T>>) -> DispatchResult {
|
|
let (session_index, clap_unique_hash) = Self::mended_session_index(&clap);
|
|
let mut claps_in_session = ClapsInSession::<T>::get(&session_index);
|
|
|
|
let disabled_authorities = claps_in_session
|
|
.values()
|
|
.filter(|info| info.disabled)
|
|
.count();
|
|
|
|
let active_authorities = Authorities::<T>::get(&session_index)
|
|
.len()
|
|
.saturating_sub(disabled_authorities);
|
|
|
|
let received_claps_key = (session_index, &clap.transaction_hash, &clap_unique_hash);
|
|
|
|
let number_of_received_claps =
|
|
ReceivedClaps::<T>::try_mutate(&received_claps_key, |tree_of_claps| {
|
|
let number_of_claps = tree_of_claps.len();
|
|
match (tree_of_claps.contains(&clap.authority_index), clap.removed) {
|
|
(true, true) => tree_of_claps
|
|
.remove(&clap.authority_index)
|
|
.then(|| number_of_claps.saturating_sub(1))
|
|
.ok_or(Error::<T>::UnregisteredClapRemove),
|
|
(true, false) => Err(Error::<T>::AlreadyClapped),
|
|
(false, true) => Err(Error::<T>::UnregisteredClapRemove),
|
|
(false, false) => tree_of_claps
|
|
.try_insert(clap.authority_index)
|
|
.map(|_| number_of_claps.saturating_add(1))
|
|
.map_err(|_| Error::<T>::TooMuchAuthorities),
|
|
}
|
|
})?;
|
|
|
|
claps_in_session
|
|
.entry(clap.authority_index)
|
|
.and_modify(|individual| individual.claps.saturating_inc())
|
|
.or_insert(SessionAuthorityInfo {
|
|
claps: 1u32,
|
|
disabled: false,
|
|
});
|
|
|
|
ClapsInSession::<T>::insert(&session_index, claps_in_session);
|
|
|
|
Self::deposit_event(Event::<T>::Clapped {
|
|
authority_id: clap.authority_index,
|
|
network_id: clap.network_id,
|
|
transaction_hash: clap.transaction_hash,
|
|
receiver: clap.receiver.clone(),
|
|
amount: clap.amount,
|
|
});
|
|
|
|
let enough_authorities =
|
|
Perbill::from_rational(number_of_received_claps as u32, active_authorities as u32)
|
|
> Perbill::from_percent(T::ApplauseThreshold::get());
|
|
|
|
if enough_authorities {
|
|
let _ = Self::try_applause(&clap, &received_claps_key).inspect_err(|error_msg| {
|
|
log::info!(
|
|
target: LOG_TARGET,
|
|
"👏 Could not applause because of: {:?}",
|
|
error_msg,
|
|
)
|
|
});
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn try_applause(
|
|
clap: &Clap<T::AccountId, NetworkIdOf<T>, BalanceOf<T>>,
|
|
received_claps_key: &(SessionIndex, &H256, &H256),
|
|
) -> DispatchResult {
|
|
ApplausesForTransaction::<T>::try_mutate(received_claps_key, |is_applaused| {
|
|
if *is_applaused || T::NetworkDataHandler::is_nullification_period() {
|
|
return Ok(());
|
|
}
|
|
|
|
let commission = T::NetworkDataHandler::get(&clap.network_id)
|
|
.map(|network_data| Perbill::from_parts(network_data.incoming_fee))
|
|
.unwrap_or_default()
|
|
.mul_ceil(clap.amount);
|
|
let final_amount = clap.amount.saturating_sub(commission);
|
|
|
|
let _ =
|
|
T::NetworkDataHandler::increase_gatekeeper_amount(&clap.network_id, &clap.amount)
|
|
.map_err(|_| Error::<T>::CouldNotIncreaseGatekeeperAmount)?;
|
|
let _ = T::NetworkDataHandler::accumulate_incoming_imbalance(&final_amount)
|
|
.map_err(|_| Error::<T>::CouldNotAccumulateIncomingImbalance)?;
|
|
let _ = T::NetworkDataHandler::accumulate_commission(&commission)
|
|
.map_err(|_| Error::<T>::CouldNotAccumulateCommission)?;
|
|
|
|
if final_amount > T::Currency::minimum_balance() {
|
|
T::Currency::mint_into(&clap.receiver, final_amount)?;
|
|
}
|
|
|
|
*is_applaused = true;
|
|
|
|
Self::deposit_event(Event::<T>::Applaused {
|
|
network_id: clap.network_id,
|
|
receiver: clap.receiver.clone(),
|
|
received_amount: final_amount,
|
|
});
|
|
|
|
Ok(())
|
|
})
|
|
}
|
|
|
|
fn try_commit_block(new_commitment: &BlockCommitment<NetworkIdOf<T>>) -> DispatchResult {
|
|
BlockCommitments::<T>::try_mutate(&new_commitment.network_id, |current_commitments| {
|
|
let authority_index = new_commitment.authority_index;
|
|
let new_commitment_details = new_commitment.commitment;
|
|
|
|
let current_last_updated = current_commitments
|
|
.get(&authority_index)
|
|
.map(|details| details.last_updated)
|
|
.unwrap_or_default();
|
|
|
|
ensure!(
|
|
new_commitment_details.last_updated > current_last_updated,
|
|
Error::<T>::TimeWentBackwards
|
|
);
|
|
|
|
current_commitments.insert(authority_index, new_commitment_details);
|
|
|
|
Self::deposit_event(Event::<T>::BlockCommited {
|
|
network_id: new_commitment.network_id,
|
|
authority_id: authority_index,
|
|
});
|
|
|
|
Ok(())
|
|
})
|
|
}
|
|
|
|
fn start_slow_clapping(block_number: BlockNumberFor<T>) -> OffchainResult<T, ()> {
|
|
let session_index = T::ValidatorSet::session_index();
|
|
let networks_len = T::NetworkDataHandler::iter().count();
|
|
let network_in_use = T::NetworkDataHandler::iter()
|
|
.nth(
|
|
block_number
|
|
.into()
|
|
.as_usize()
|
|
.checked_rem(networks_len)
|
|
.unwrap_or_default(),
|
|
)
|
|
.ok_or(OffchainErr::NoStoredNetworks)?;
|
|
|
|
let network_id_encoded = network_in_use.0.encode();
|
|
|
|
let rate_limit_delay_key = Self::create_storage_key(b"rate-limit-", &network_id_encoded);
|
|
let rate_limit_delay = Self::read_persistent_offchain_storage(
|
|
&rate_limit_delay_key,
|
|
network_in_use.1.rate_limit_delay,
|
|
);
|
|
|
|
let network_lock_key = Self::create_storage_key(b"network-lock-", &network_id_encoded);
|
|
let block_until =
|
|
rt_offchain::Duration::from_millis(rate_limit_delay.max(MIN_LOCK_GUARD_PERIOD));
|
|
let mut network_lock = StorageLock::<Time>::with_deadline(&network_lock_key, block_until);
|
|
|
|
let _lock_guard = network_lock
|
|
.try_lock()
|
|
.map_err(|_| OffchainErr::OffchainTimeoutPeriod(network_in_use.0))?;
|
|
|
|
log::info!(
|
|
target: LOG_TARGET,
|
|
"🧐 Offchain worker started for network #{:?} at block #{:?}",
|
|
network_in_use.0,
|
|
block_number,
|
|
);
|
|
|
|
Self::do_evm_claps_or_save_block(session_index, network_in_use.0, &network_in_use.1)
|
|
}
|
|
|
|
fn do_evm_claps_or_save_block(
|
|
session_index: SessionIndex,
|
|
network_id: NetworkIdOf<T>,
|
|
network_data: &NetworkData,
|
|
) -> OffchainResult<T, ()> {
|
|
let network_id_encoded = network_id.encode();
|
|
|
|
let block_number_key = Self::create_storage_key(b"block-", &network_id_encoded);
|
|
let block_distance_key = Self::create_storage_key(b"block-distance-", &network_id_encoded);
|
|
let endpoint_key = Self::create_storage_key(b"endpoint-", &network_id_encoded);
|
|
|
|
let max_block_distance = Self::read_persistent_offchain_storage(
|
|
&block_distance_key,
|
|
network_data.block_distance,
|
|
);
|
|
let stored_endpoints = Self::read_persistent_offchain_storage(
|
|
&endpoint_key,
|
|
network_data.default_endpoints.clone(),
|
|
);
|
|
|
|
let random_seed = sp_io::offchain::random_seed();
|
|
let random_number = <u32>::decode(&mut TrailingZeroInput::new(random_seed.as_ref()))
|
|
.expect("input is padded with zeroes; qed");
|
|
|
|
let random_index = (random_number as usize)
|
|
.checked_rem(stored_endpoints.len())
|
|
.unwrap_or_default();
|
|
|
|
let endpoints = if !stored_endpoints.is_empty() {
|
|
&stored_endpoints
|
|
} else {
|
|
&network_data.default_endpoints
|
|
};
|
|
|
|
let rpc_endpoint = endpoints
|
|
.get(random_index)
|
|
.ok_or(OffchainErr::NoEndpointAvailable(network_id))?;
|
|
|
|
let (from_block, to_block): (u64, u64) = StorageValueRef::persistent(&block_number_key)
|
|
.get()
|
|
.map_err(|_| OffchainErr::StorageRetrievalError(network_id))?
|
|
.unwrap_or_default();
|
|
|
|
let request_body = if from_block < to_block.saturating_sub(1) {
|
|
Self::prepare_request_body_for_latest_transfers(
|
|
from_block,
|
|
to_block.saturating_sub(1),
|
|
network_data,
|
|
)
|
|
} else {
|
|
Self::prepare_request_body_for_latest_block(network_data)
|
|
};
|
|
|
|
let response_bytes = Self::fetch_from_remote(&rpc_endpoint, &request_body)?;
|
|
|
|
match network_data.network_type {
|
|
NetworkType::Evm => {
|
|
let parsed_evm_response = Self::parse_evm_response(&response_bytes)?;
|
|
let new_block_range = match parsed_evm_response {
|
|
EvmResponseType::BlockNumber(new_evm_block) if from_block.le(&to_block) => {
|
|
let estimated_block =
|
|
new_evm_block.saturating_sub(network_data.finality_delay);
|
|
let adjusted_block =
|
|
Self::adjust_to_block(estimated_block, from_block, max_block_distance);
|
|
|
|
if from_block == 0 {
|
|
(estimated_block, estimated_block)
|
|
} else {
|
|
(from_block, adjusted_block)
|
|
}
|
|
}
|
|
_ => (to_block, to_block),
|
|
};
|
|
|
|
StorageValueRef::persistent(&block_number_key).set(&new_block_range);
|
|
|
|
if !sp_io::offchain::is_validator() {
|
|
log::info!(target: LOG_TARGET, "🧐 Not a validator; no transactions available");
|
|
return Ok(());
|
|
}
|
|
|
|
for (authority_index, authority_key) in Self::local_authorities(&session_index) {
|
|
parsed_evm_response.sign_and_submit::<T>(
|
|
new_block_range.0,
|
|
authority_index,
|
|
authority_key,
|
|
session_index,
|
|
network_id,
|
|
);
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
NetworkType::Utxo => Err(OffchainErr::UtxoNotImplemented(network_id).into()),
|
|
_ => Err(OffchainErr::UnknownNetworkType(network_id).into()),
|
|
}
|
|
}
|
|
|
|
fn adjust_to_block(estimated_block: u64, from_block: u64, max_block_distance: u64) -> u64 {
|
|
let fallback_value = from_block
|
|
.saturating_add(max_block_distance)
|
|
.min(estimated_block);
|
|
|
|
estimated_block
|
|
.checked_sub(from_block)
|
|
.map(|current_distance| {
|
|
current_distance
|
|
.le(&max_block_distance)
|
|
.then_some(estimated_block)
|
|
})
|
|
.flatten()
|
|
.unwrap_or(fallback_value)
|
|
}
|
|
|
|
fn local_authorities(
|
|
session_index: &SessionIndex,
|
|
) -> impl Iterator<Item = (u32, T::AuthorityId)> {
|
|
let authorities = Authorities::<T>::get(session_index);
|
|
let mut local_authorities = T::AuthorityId::all();
|
|
local_authorities.sort();
|
|
|
|
authorities
|
|
.into_iter()
|
|
.enumerate()
|
|
.filter_map(move |(index, authority)| {
|
|
local_authorities
|
|
.binary_search(&authority)
|
|
.ok()
|
|
.map(|location| (index as u32, local_authorities[location].clone()))
|
|
})
|
|
}
|
|
|
|
fn fetch_from_remote(rpc_endpoint: &[u8], request_body: &[u8]) -> OffchainResult<T, Vec<u8>> {
|
|
let rpc_endpoint_str =
|
|
core::str::from_utf8(rpc_endpoint).expect("rpc endpoint valid str; qed");
|
|
let request_body_str =
|
|
core::str::from_utf8(request_body).expect("request body valid str: qed");
|
|
|
|
let deadline = sp_io::offchain::timestamp()
|
|
.add(rt_offchain::Duration::from_millis(FETCH_TIMEOUT_PERIOD));
|
|
|
|
let pending = rt_offchain::http::Request::post(&rpc_endpoint_str, vec![request_body_str])
|
|
.add_header("Accept", "application/json")
|
|
.add_header("Content-Type", "application/json")
|
|
.deadline(deadline)
|
|
.send()
|
|
.map_err(|err| OffchainErr::HttpRequestError(err))?;
|
|
|
|
let response = pending
|
|
.try_wait(deadline)
|
|
.map_err(|_| OffchainErr::RequestUncompleted)?
|
|
.map_err(|_| OffchainErr::RequestUncompleted)?;
|
|
|
|
if response.code != 200 {
|
|
return Err(OffchainErr::HttpResponseNotOk(response.code));
|
|
}
|
|
|
|
Ok(response.body().collect::<Vec<u8>>())
|
|
}
|
|
|
|
fn prepare_request_body_for_latest_block(network_data: &NetworkData) -> Vec<u8> {
|
|
match network_data.network_type {
|
|
NetworkType::Evm => {
|
|
b"{\"id\":0,\"jsonrpc\":\"2.0\",\"method\":\"eth_blockNumber\"}".to_vec()
|
|
}
|
|
_ => Default::default(),
|
|
}
|
|
}
|
|
|
|
fn prepare_request_body_for_latest_transfers(
|
|
from_block: u64,
|
|
to_block: u64,
|
|
network_data: &NetworkData,
|
|
) -> Vec<u8> {
|
|
match network_data.network_type {
|
|
NetworkType::Evm => {
|
|
let mut body =
|
|
b"{\"id\":0,\"jsonrpc\":\"2.0\",\"method\":\"eth_getLogs\",\"params\":[{"
|
|
.to_vec();
|
|
body.extend(b"\"fromBlock\":\"".to_vec());
|
|
body.extend(Self::u64_to_hexadecimal_bytes(from_block));
|
|
body.extend(b"\",\"toBlock\":\"".to_vec());
|
|
body.extend(Self::u64_to_hexadecimal_bytes(to_block));
|
|
body.extend(b"\",\"address\":\"".to_vec());
|
|
body.extend(network_data.gatekeeper.to_vec());
|
|
body.extend(b"\",\"topics\":[\"".to_vec());
|
|
body.extend(network_data.topic_name.to_vec());
|
|
body.extend(b"\"]}]}".to_vec());
|
|
body
|
|
}
|
|
_ => Default::default(),
|
|
}
|
|
}
|
|
|
|
fn parse_evm_response(response_bytes: &[u8]) -> OffchainResult<T, EvmResponseType> {
|
|
let response_str = sp_std::str::from_utf8(&response_bytes)
|
|
.map_err(|_| OffchainErr::HttpBytesParsingError)?;
|
|
|
|
let response_result: EvmResponse =
|
|
serde_json::from_str(&response_str).map_err(|_| OffchainErr::HttpJsonParsingError)?;
|
|
|
|
if response_result.error.is_some() {
|
|
return Err(OffchainErr::ErrorInEvmResponse);
|
|
}
|
|
|
|
Ok(response_result
|
|
.result
|
|
.ok_or(OffchainErr::ErrorInEvmResponse)?)
|
|
}
|
|
|
|
fn calculate_median_claps(
|
|
actual_claps_in_session: &BTreeMap<AuthIndex, SessionAuthorityInfo>,
|
|
authorities_len: usize,
|
|
) -> u32 {
|
|
let mut claps_in_session = (0..authorities_len)
|
|
.filter_map(|authority_index| {
|
|
let clap_info = actual_claps_in_session
|
|
.get(&(authority_index as AuthIndex))
|
|
.copied()
|
|
.unwrap_or_default();
|
|
(!clap_info.disabled).then(|| clap_info.claps)
|
|
})
|
|
.collect::<Vec<_>>();
|
|
|
|
if claps_in_session.is_empty() {
|
|
return 0;
|
|
}
|
|
|
|
claps_in_session.sort();
|
|
let number_of_claps = claps_in_session.len();
|
|
|
|
if number_of_claps % 2 == 0 {
|
|
let mid_left = claps_in_session[number_of_claps / 2 - 1];
|
|
let mid_right = claps_in_session[number_of_claps / 2];
|
|
(mid_left + mid_right) / 2
|
|
} else {
|
|
claps_in_session[number_of_claps / 2]
|
|
}
|
|
}
|
|
|
|
fn is_good_actor(
|
|
authority_index: usize,
|
|
median_claps: u32,
|
|
claps_in_session: &BTreeMap<AuthIndex, SessionAuthorityInfo>,
|
|
) -> bool {
|
|
if median_claps == 0 {
|
|
return true;
|
|
}
|
|
|
|
let number_of_claps = claps_in_session
|
|
.get(&(authority_index as AuthIndex))
|
|
.copied()
|
|
.map(|info| match info.disabled {
|
|
true => median_claps,
|
|
false => info.claps,
|
|
})
|
|
.unwrap_or_default();
|
|
|
|
let authority_deviation = if number_of_claps < median_claps {
|
|
Perbill::from_rational(median_claps - number_of_claps, median_claps)
|
|
} else {
|
|
Perbill::from_rational(number_of_claps - median_claps, median_claps)
|
|
};
|
|
authority_deviation < Perbill::from_percent(T::OffenceThreshold::get())
|
|
}
|
|
|
|
fn initialize_authorities(authorities: Vec<T::AuthorityId>) {
|
|
let session_index = T::ValidatorSet::session_index();
|
|
assert!(
|
|
Authorities::<T>::get(&session_index).is_empty(),
|
|
"Authorities are already initilized!"
|
|
);
|
|
let bounded_authorities = WeakBoundedVec::<_, T::MaxAuthorities>::try_from(authorities)
|
|
.expect("more than the maximum number of authorities");
|
|
|
|
let validators = T::ValidatorSet::validators();
|
|
let bounded_validators = WeakBoundedVec::<_, T::MaxAuthorities>::try_from(validators)
|
|
.expect("more than the maximum number of validators");
|
|
|
|
if let Some(target_session_index) = session_index.checked_sub(T::HistoryDepth::get()) {
|
|
Self::clear_history(&target_session_index);
|
|
}
|
|
|
|
Validators::<T>::insert(&session_index, bounded_validators);
|
|
Authorities::<T>::set(&session_index, bounded_authorities);
|
|
|
|
let mut disabled_validators: BTreeMap<AuthIndex, SessionAuthorityInfo> = Default::default();
|
|
for disabled_index in T::DisabledValidators::disabled_validators().iter() {
|
|
let _ = disabled_validators.insert(
|
|
*disabled_index,
|
|
SessionAuthorityInfo {
|
|
claps: 0u32,
|
|
disabled: true,
|
|
},
|
|
);
|
|
}
|
|
ClapsInSession::<T>::set(&session_index, disabled_validators);
|
|
}
|
|
|
|
fn clear_history(target_session_index: &SessionIndex) {
|
|
ClapsInSession::<T>::remove(target_session_index);
|
|
Authorities::<T>::remove(target_session_index);
|
|
Validators::<T>::remove(target_session_index);
|
|
let mut cursor = ReceivedClaps::<T>::clear_prefix((target_session_index,), u32::MAX, None);
|
|
debug_assert!(cursor.maybe_cursor.is_none());
|
|
cursor =
|
|
ApplausesForTransaction::<T>::clear_prefix((target_session_index,), u32::MAX, None);
|
|
debug_assert!(cursor.maybe_cursor.is_none());
|
|
}
|
|
|
|
#[cfg(test)]
|
|
fn set_test_authorities(session_index: SessionIndex, authorities: Vec<T::AuthorityId>) {
|
|
let bounded_authorities = WeakBoundedVec::<_, T::MaxAuthorities>::try_from(authorities)
|
|
.expect("more than the maximum number of authorities");
|
|
Authorities::<T>::set(session_index, bounded_authorities);
|
|
}
|
|
}
|
|
|
|
impl<T: Config> sp_runtime::BoundToRuntimeAppPublic for Pallet<T> {
|
|
type Public = T::AuthorityId;
|
|
}
|
|
|
|
impl<T: Config> BlockNumberProvider for Pallet<T> {
|
|
type BlockNumber = BlockNumberFor<T>;
|
|
fn current_block_number() -> Self::BlockNumber {
|
|
T::BlockNumberProvider::current_block_number()
|
|
}
|
|
}
|
|
|
|
impl<T: Config> OneSessionHandler<T::AccountId> for Pallet<T> {
|
|
type Key = T::AuthorityId;
|
|
|
|
fn on_genesis_session<'a, I: 'a>(validators: I)
|
|
where
|
|
I: Iterator<Item = (&'a T::AccountId, T::AuthorityId)>,
|
|
{
|
|
let authorities = validators.map(|x| x.1).collect::<Vec<_>>();
|
|
Self::initialize_authorities(authorities);
|
|
}
|
|
|
|
fn on_new_session<'a, I: 'a>(_changed: bool, validators: I, _queued_validators: I)
|
|
where
|
|
I: Iterator<Item = (&'a T::AccountId, T::AuthorityId)>,
|
|
{
|
|
for (network_id, _) in BlockCommitments::<T>::iter() {
|
|
BlockCommitments::<T>::remove(network_id);
|
|
}
|
|
|
|
let authorities = validators.map(|x| x.1).collect::<Vec<_>>();
|
|
Self::initialize_authorities(authorities);
|
|
}
|
|
|
|
fn on_before_session_ending() {
|
|
let session_index = T::ValidatorSet::session_index().saturating_sub(1);
|
|
let validators = Validators::<T>::get(&session_index).unwrap_or_default();
|
|
let authorities_len = Authorities::<T>::get(&session_index).len();
|
|
let claps_in_session = ClapsInSession::<T>::get(&session_index);
|
|
|
|
let median_claps = Self::calculate_median_claps(&claps_in_session, authorities_len);
|
|
|
|
let offenders = validators
|
|
.into_iter()
|
|
.enumerate()
|
|
.filter_map(|(index, id)| {
|
|
(!Self::is_good_actor(index, median_claps, &claps_in_session)).then(|| {
|
|
<T::ValidatorSet as ValidatorSetWithIdentification<T::AccountId>>::IdentificationOf::convert(
|
|
id.clone(),
|
|
).map(|full_id| (id, full_id))
|
|
})
|
|
.flatten()
|
|
})
|
|
.collect::<Vec<IdentificationTuple<T>>>();
|
|
|
|
let disabled_validators = T::DisabledValidators::disabled_validators()
|
|
.into_iter()
|
|
.count();
|
|
|
|
let offenders_length = offenders.len();
|
|
let authorities_left: u32 = authorities_len
|
|
.saturating_sub(disabled_validators)
|
|
.saturating_sub(offenders_length)
|
|
.try_into()
|
|
.unwrap_or_default();
|
|
|
|
if offenders_length == 0 {
|
|
Self::deposit_event(Event::<T>::AuthoritiesEquilibrium);
|
|
} else if authorities_left < T::MinAuthoritiesNumber::get() {
|
|
Self::deposit_event(Event::<T>::BlackSwan);
|
|
} else {
|
|
Self::deposit_event(Event::<T>::SomeAuthoritiesTrottling {
|
|
throttling: offenders.clone(),
|
|
});
|
|
|
|
let validator_set_count = authorities_len as u32;
|
|
let offence = ThrottlingOffence {
|
|
session_index,
|
|
validator_set_count,
|
|
offenders,
|
|
};
|
|
if let Err(e) = T::ReportUnresponsiveness::report_offence(vec![], offence) {
|
|
sp_runtime::print(e)
|
|
}
|
|
}
|
|
}
|
|
|
|
fn on_disabled(validator_index: u32) {
|
|
let session_index = T::ValidatorSet::session_index();
|
|
ClapsInSession::<T>::mutate(&session_index, |claps_details| {
|
|
(*claps_details)
|
|
.entry(validator_index as AuthIndex)
|
|
.and_modify(|individual| (*individual).disabled = true)
|
|
.or_insert(SessionAuthorityInfo {
|
|
claps: 0u32,
|
|
disabled: true,
|
|
});
|
|
});
|
|
}
|
|
}
|
|
|
|
#[derive(RuntimeDebug, TypeInfo)]
|
|
#[cfg_attr(feature = "std", derive(Clone, PartialEq, Eq))]
|
|
pub struct ThrottlingOffence<Offender> {
|
|
pub session_index: SessionIndex,
|
|
pub validator_set_count: u32,
|
|
pub offenders: Vec<Offender>,
|
|
}
|
|
|
|
impl<Offender: Clone> Offence<Offender> for ThrottlingOffence<Offender> {
|
|
const ID: Kind = *b"slow-clap:throtl";
|
|
type TimeSlot = SessionIndex;
|
|
|
|
fn offenders(&self) -> Vec<Offender> {
|
|
self.offenders.clone()
|
|
}
|
|
|
|
fn session_index(&self) -> SessionIndex {
|
|
self.session_index
|
|
}
|
|
|
|
fn validator_set_count(&self) -> u32 {
|
|
self.validator_set_count
|
|
}
|
|
|
|
fn time_slot(&self) -> Self::TimeSlot {
|
|
self.session_index
|
|
}
|
|
|
|
fn slash_fraction(&self, offenders_count: u32) -> Perbill {
|
|
if let Some(threshold) = offenders_count.checked_sub(self.validator_set_count / 10 + 1) {
|
|
let x = Perbill::from_rational(3 * threshold, self.validator_set_count);
|
|
x.saturating_mul(Perbill::from_percent(7))
|
|
} else {
|
|
Perbill::default()
|
|
}
|
|
}
|
|
}
|