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

// Copyright 2019-2020 Parity Technologies (UK) Ltd.
// This file is part of substrate-subxt.
//
// subxt is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// subxt is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with substrate-subxt.  If not, see <http://www.gnu.org/licenses/>.

//! Implements support for the frame_system module.

use codec::{
    Codec,
    Decode,
    Encode,
};
use core::marker::PhantomData;
use frame_support::{
    weights::DispatchInfo,
    Parameter,
};
use serde::de::DeserializeOwned;
use sp_runtime::{
    traits::{
        AtLeast32Bit,
        Bounded,
        CheckEqual,
        Extrinsic,
        Hash,
        Header,
        MaybeDisplay,
        MaybeMallocSizeOf,
        MaybeSerialize,
        MaybeSerializeDeserialize,
        Member,
        SimpleBitOps,
    },
    DispatchError,
};
use std::fmt::Debug;

/// The subset of the `frame::Trait` that a client must implement.
#[module]
pub trait System {
    /// Account index (aka nonce) type. This stores the number of previous
    /// transactions associated with a sender account.
    type Index: Parameter
        + Member
        + MaybeSerialize
        + Debug
        + Default
        + MaybeDisplay
        + AtLeast32Bit
        + Copy;

    /// The block number type used by the runtime.
    type BlockNumber: Parameter
        + Member
        + MaybeMallocSizeOf
        + MaybeSerializeDeserialize
        + Debug
        + MaybeDisplay
        + AtLeast32Bit
        + Default
        + Bounded
        + Copy
        + std::hash::Hash
        + std::str::FromStr;

    /// The output of the `Hashing` function.
    type Hash: Parameter
        + Member
        + MaybeMallocSizeOf
        + MaybeSerializeDeserialize
        + Debug
        + MaybeDisplay
        + Ord
        + SimpleBitOps
        + Default
        + Copy
        + CheckEqual
        + std::hash::Hash
        + AsRef<[u8]>
        + AsMut<[u8]>;

    /// The hashing system (algorithm) being used in the runtime (e.g. Blake2).
    #[module(ignore)]
    type Hashing: Hash<Output = Self::Hash>;

    /// The user account identifier type for the runtime.
    type AccountId: Parameter
        + Member
        + MaybeSerialize
        + Debug
        + MaybeDisplay
        + Ord
        + Default;

    /// The address type. This instead of `<frame_system::Trait::Lookup as StaticLookup>::Source`.
    #[module(ignore)]
    type Address: Codec + Clone + PartialEq + Debug + Send + Sync;

    /// The block header.
    #[module(ignore)]
    type Header: Parameter
        + Header<Number = Self::BlockNumber, Hash = Self::Hash>
        + DeserializeOwned;

    /// Extrinsic type within blocks.
    #[module(ignore)]
    type Extrinsic: Parameter + Member + Extrinsic + Debug + MaybeSerializeDeserialize;

    /// Data to be associated with an account (other than nonce/transaction counter, which this
    /// module does regardless).
    type AccountData: Member + Codec + Clone + Default;
}

/// Type used to encode the number of references an account has.
pub type RefCount = u8;

/// Information of an account.
#[derive(Clone, Debug, Eq, PartialEq, Default, Decode, Encode)]
pub struct AccountInfo<T: System> {
    /// The number of transactions this account has sent.
    pub nonce: T::Index,
    /// The number of other modules that currently depend on this account's existence. The account
    /// cannot be reaped until this is zero.
    pub refcount: RefCount,
    /// The additional data that belongs to this account. Used to store the balance(s) in a lot of
    /// chains.
    pub data: T::AccountData,
}

/// Account field of the `System` module.
#[derive(Clone, Debug, Eq, PartialEq, Store, Encode)]
pub struct AccountStore<'a, T: System> {
    #[store(returns = AccountInfo<T>)]
    /// Account to retrieve the `AccountInfo<T>` for.
    pub account_id: &'a T::AccountId,
}

/// Arguments for updating the runtime code
#[derive(Clone, Debug, Eq, PartialEq, Call, Encode)]
pub struct SetCodeCall<'a, T: System> {
    /// Runtime marker.
    pub _runtime: PhantomData<T>,
    /// Runtime wasm blob.
    pub code: &'a [u8],
}

/// Event for the System module.
#[derive(Clone, Debug, Eq, PartialEq, Decode)]
pub enum SystemEvent<T: System> {
    /// An extrinsic completed successfully.
    ExtrinsicSuccess(DispatchInfo),
    /// An extrinsic failed.
    ExtrinsicFailed(DispatchError, DispatchInfo),
    /// `:code` was updated.
    CodeUpdated,
    /// A new account was created.
    NewAccount(T::AccountId),
    /// An account was reaped.
    KilledAccount(T::AccountId),
}

/// A phase of a block's execution.
#[derive(Clone, Debug, Eq, PartialEq, Decode)]
pub enum Phase {
    /// Applying an extrinsic.
    ApplyExtrinsic(u32),
    /// The end.
    Finalization,
}