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

// Copyright (c) Aptos
// SPDX-License-Identifier: Apache-2.0

#![forbid(unsafe_code)]

//! # The VM runtime
//!
//! ## Transaction flow
//!
//! This is the path taken to process a single transaction.
//!
//! ```text
//!                   SignedTransaction
//!                            +
//!                            |
//! +--------------------------|-------------------+
//! | Validate  +--------------+--------------+    |
//! |           |                             |    |
//! |           |       check signature       |    |
//! |           |                             |    |
//! |           +--------------+--------------+    |
//! |                          |                   |
//! |                          |                   |
//! |                          v                   |
//! |           +--------------+--------------+    |
//! |           |                             |    |
//! |           |      check size and gas     |    |
//! |           |                             |    +---------------------------------+
//! |           +--------------+--------------+    |         validation error        |
//! |                          |                   |                                 |
//! |                          |                   |                                 |
//! |                          v                   |                                 |
//! |           +--------------+--------------+    |                                 |
//! |           |                             |    |                                 |
//! |           |         run prologue        |    |                                 |
//! |           |                             |    |                                 |
//! |           +--------------+--------------+    |                                 |
//! |                          |                   |                                 |
//! +--------------------------|-------------------+                                 |
//!                            |                                                     |
//! +--------------------------|-------------------+                                 |
//! |                          v                   |                                 |
//! |  Verify   +--------------+--------------+    |                                 |
//! |           |                             |    |                                 |
//! |           |     deserialize script,     |    |                                 |
//! |           |     verify arguments        |    |                                 |
//! |           |                             |    |                                 |
//! |           +--------------+--------------+    |                                 |
//! |                          |                   |                                 |
//! |                          |                   |                                 v
//! |                          v                   |                    +----------------+------+
//! |           +--------------+--------------+    |                    |                       |
//! |           |                             |    +------------------->+ discard, no write set |
//! |           |     deserialize modules     |    | verification error |                       |
//! |           |                             |    |                    +----------------+------+
//! |           +--------------+--------------+    |                                 ^
//! |                          |                   |                                 |
//! |                          |                   |                                 |
//! |                          v                   |                                 |
//! |           +--------------+--------------+    |                                 |
//! |           |                             |    |                                 |
//! |           | verify scripts and modules  |    |                                 |
//! |           |                             |    |                                 |
//! |           +--------------+--------------+    |                                 |
//! |                          |                   |                                 |
//! +--------------------------|-------------------+                                 |
//!                            |                                                     |
//! +--------------------------|-------------------+                                 |
//! |                          v                   |                                 |
//! | Execute   +--------------+--------------+    |                                 |
//! |           |                             |    |                                 |
//! |           |        execute main         |    |                                 |
//! |           |                             |    |                                 |
//! |           +--------------+--------------+    |                                 |
//! |                          |                   |                                 |
//! |      success or failure  |                   |                                 |
//! |                          v                   |                                 |
//! |           +--------------+--------------+    |                                 |
//! |           |                             |    +---------------------------------+
//! |           |        run epilogue         |    | invariant violation (internal panic)
//! |           |                             |    |
//! |           +--------------+--------------+    |
//! |                          |                   |
//! |                          |                   |
//! |                          v                   |
//! |           +--------------+--------------+    |                    +-----------------------+
//! |           |                             |    | execution failure  |                       |
//! |           |       make write set        +------------------------>+ keep, only charge gas |
//! |           |                             |    |                    |                       |
//! |           +--------------+--------------+    |                    +-----------------------+
//! |                          |                   |
//! +--------------------------|-------------------+
//!                            |
//!                            v
//!             +--------------+--------------+
//!             |                             |
//!             |  keep, transaction executed |
//!             |        + gas charged        |
//!             |                             |
//!             +-----------------------------+
//! ```

#[macro_use]
extern crate mirai_annotations;
mod access_path_cache;
#[macro_use]
mod counters;
pub mod data_cache;

#[cfg(feature = "mirai-contracts")]
pub mod foreign_contracts;

mod adapter_common;
pub mod aptos_vm;
mod aptos_vm_impl;
mod errors;
pub mod logging;
pub mod move_vm_ext;
pub mod natives;
pub mod parallel_executor;
pub mod read_write_set_analysis;
pub mod script_to_script_function;
pub mod system_module_names;
pub mod transaction_metadata;

pub use crate::aptos_vm::AptosVM;

use aptos_state_view::StateView;
use aptos_types::{
    access_path::AccessPath,
    transaction::{SignedTransaction, Transaction, TransactionOutput, VMValidatorResult},
    vm_status::VMStatus,
};
use move_deps::move_core_types::{
    account_address::AccountAddress,
    language_storage::{ResourceKey, StructTag},
};

/// This trait describes the VM's validation interfaces.
pub trait VMValidator {
    /// Executes the prologue of the Aptos Account and verifies that the transaction is valid.
    fn validate_transaction(
        &self,
        transaction: SignedTransaction,
        state_view: &impl StateView,
    ) -> VMValidatorResult;
}

/// This trait describes the VM's execution interface.
pub trait VMExecutor: Send + Sync {
    // NOTE: At the moment there are no persistent caches that live past the end of a block (that's
    // why execute_block doesn't take &self.)
    // There are some cache invalidation issues around transactions publishing code that need to be
    // sorted out before that's possible.

    /// Executes a block of transactions and returns output for each one of them.
    fn execute_block(
        transactions: Vec<Transaction>,
        state_view: &impl StateView,
    ) -> Result<Vec<TransactionOutput>, VMStatus>;
}

/// Get the AccessPath to a resource stored under `address` with type name `tag`
fn create_access_path(address: AccountAddress, tag: StructTag) -> AccessPath {
    let resource_tag = ResourceKey::new(address, tag);
    AccessPath::resource_access_path(resource_tag)
}