1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184

//! Reactor used to initialize a node.

use std::fmt::{self, Display, Formatter};

use datasize::DataSize;
use derive_more::From;
use prometheus::Registry;
use thiserror::Error;

use crate::{
    components::{
        chainspec_loader::{self, ChainspecLoader},
        contract_runtime::{self, ContractRuntime},
        small_network::NodeId,
        storage::{self, Storage, StorageType},
        Component,
    },
    effect::{
        requests::{ContractRuntimeRequest, NetworkRequest, StorageRequest},
        EffectBuilder, Effects,
    },
    protocol::Message,
    reactor::{self, validator, EventQueueHandle},
    types::CryptoRngCore,
    utils::WithDir,
};

/// Top-level event for the reactor.
#[derive(Debug, From)]
#[must_use]
pub enum Event {
    /// Chainspec handler event.
    #[from]
    Chainspec(chainspec_loader::Event),

    /// Storage event.
    #[from]
    Storage(storage::Event<Storage>),

    /// Contract runtime event.
    #[from]
    ContractRuntime(contract_runtime::Event),
}

impl From<StorageRequest<Storage>> for Event {
    fn from(request: StorageRequest<Storage>) -> Self {
        Event::Storage(storage::Event::Request(request))
    }
}

impl From<ContractRuntimeRequest> for Event {
    fn from(request: ContractRuntimeRequest) -> Self {
        Event::ContractRuntime(contract_runtime::Event::Request(request))
    }
}

impl From<NetworkRequest<NodeId, Message>> for Event {
    fn from(_request: NetworkRequest<NodeId, Message>) -> Self {
        unreachable!("no network traffic happens during initialization")
    }
}

impl Display for Event {
    fn fmt(&self, formatter: &mut Formatter<'_>) -> fmt::Result {
        match self {
            Event::Chainspec(event) => write!(formatter, "chainspec: {}", event),
            Event::Storage(event) => write!(formatter, "storage: {}", event),
            Event::ContractRuntime(event) => write!(formatter, "contract runtime: {}", event),
        }
    }
}

/// Error type returned by the initializer reactor.
#[derive(Debug, Error)]
pub enum Error {
    /// `Config` error.
    #[error("config error: {0}")]
    ConfigError(String),

    /// Metrics-related error
    #[error("prometheus (metrics) error: {0}")]
    Metrics(#[from] prometheus::Error),

    /// `ChainspecHandler` component error.
    #[error("chainspec error: {0}")]
    Chainspec(#[from] chainspec_loader::Error),

    /// `Storage` component error.
    #[error("storage error: {0}")]
    Storage(#[from] storage::Error),

    /// `ContractRuntime` component error.
    #[error("contract runtime config error: {0}")]
    ContractRuntime(#[from] contract_runtime::ConfigError),
}

/// Initializer node reactor.
#[derive(DataSize, Debug)]
pub struct Reactor {
    pub(super) config: WithDir<validator::Config>,
    pub(super) chainspec_loader: ChainspecLoader,
    pub(super) storage: Storage,
    pub(super) contract_runtime: ContractRuntime,
}

impl Reactor {
    /// Returns whether the initialization process completed successfully or not.
    pub fn stopped_successfully(&self) -> bool {
        self.chainspec_loader.stopped_successfully()
    }
}

impl reactor::Reactor for Reactor {
    type Event = Event;
    type Config = WithDir<validator::Config>;
    type Error = Error;

    fn new(
        config: Self::Config,
        registry: &Registry,
        event_queue: EventQueueHandle<Self::Event>,
        _rng: &mut dyn CryptoRngCore,
    ) -> Result<(Self, Effects<Self::Event>), Error> {
        let chainspec = config
            .value()
            .node
            .chainspec_config_path
            .clone()
            .load(config.dir())
            .map_err(|err| Error::ConfigError(err.to_string()))?;

        chainspec.validate_config();

        let effect_builder = EffectBuilder::new(event_queue);

        let storage_config = config.map_ref(|cfg| cfg.storage.clone());
        let storage = Storage::new(storage_config.clone())?;

        let contract_runtime =
            ContractRuntime::new(storage_config, &config.value().contract_runtime, registry)?;
        let (chainspec_loader, chainspec_effects) =
            ChainspecLoader::new(chainspec, effect_builder)?;

        let effects = reactor::wrap_effects(Event::Chainspec, chainspec_effects);

        Ok((
            Reactor {
                config,
                chainspec_loader,
                storage,
                contract_runtime,
            },
            effects,
        ))
    }

    fn dispatch_event(
        &mut self,
        effect_builder: EffectBuilder<Self::Event>,
        rng: &mut dyn CryptoRngCore,
        event: Event,
    ) -> Effects<Self::Event> {
        match event {
            Event::Chainspec(event) => reactor::wrap_effects(
                Event::Chainspec,
                self.chainspec_loader
                    .handle_event(effect_builder, rng, event),
            ),
            Event::Storage(event) => reactor::wrap_effects(
                Event::Storage,
                self.storage.handle_event(effect_builder, rng, event),
            ),
            Event::ContractRuntime(event) => reactor::wrap_effects(
                Event::ContractRuntime,
                self.contract_runtime
                    .handle_event(effect_builder, rng, event),
            ),
        }
    }

    fn is_stopped(&mut self) -> bool {
        self.chainspec_loader.is_stopped()
    }
}