multiversx-chain-vm 0.23.1

MultiversX VM implementation and tooling
Documentation 
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

use multiversx_chain_vm_executor::VMHooksEarlyExit;

use crate::{
    crypto_functions,
    host::vm_hooks::{VMHooksContext, vh_early_exit::early_exit_vm_error},
    types::RawHandle,
    vm_err_msg,
};

use super::VMHooksHandler;

impl<C: VMHooksContext> VMHooksHandler<C> {
    pub fn sha256_managed(
        &mut self,
        dest: RawHandle,
        data_handle: RawHandle,
    ) -> Result<(), VMHooksEarlyExit> {
        self.use_gas(self.gas_schedule().crypto_api_cost.sha_256)?;

        // default implementation used in debugger
        // the VM has a dedicated hook
        let mut types = self.context.m_types_lock();
        let data = types.mb_get(data_handle);
        let result_bytes = crypto_functions::sha256(data);
        types.mb_set(dest, result_bytes[..].to_vec());

        Ok(())
    }

    pub fn keccak256_managed(
        &mut self,
        dest: RawHandle,
        data_handle: RawHandle,
    ) -> Result<(), VMHooksEarlyExit> {
        self.use_gas(self.gas_schedule().crypto_api_cost.keccak_256)?;

        // default implementation used in debugger
        // the VM has a dedicated hook
        let mut types = self.context.m_types_lock();
        let data = types.mb_get(data_handle);
        let result_bytes = crypto_functions::keccak256(data);
        types.mb_set(dest, result_bytes[..].to_vec());

        Ok(())
    }

    /// Should crash if the signature is invalid.
    pub fn verify_ed25519_managed(
        &mut self,
        key: RawHandle,
        message: RawHandle,
        signature: RawHandle,
    ) -> Result<(), VMHooksEarlyExit> {
        let sig_valid = {
            self.use_gas(self.gas_schedule().crypto_api_cost.verify_ed_25519)?;

            let types = self.context.m_types_lock();
            let key = types.mb_get(key);
            let message = types.mb_get(message);
            let signature = types.mb_get(signature);
            crypto_functions::verify_ed25519(key, message, signature)
        };
        if !sig_valid {
            return Err(early_exit_vm_error(vm_err_msg::CRYPTO_ED25519_ERROR));
        }

        Ok(())
    }

    #[cfg(feature = "bls")]
    pub fn verify_bls_managed(
        &self,
        key_handle: RawHandle,
        message_handle: RawHandle,
        signature_handle: RawHandle,
    ) -> Result<(), VMHooksEarlyExit> {
        let types = self.context.m_types_lock();
        let key = types.mb_get(key_handle);
        let message = types.mb_get(message_handle);
        let signature = types.mb_get(signature_handle);
        let sig_valid = crate::crypto_functions_bls::verify_bls(key, message, signature);
        if !sig_valid {
            return Err(early_exit_vm_error("bls verify error"));
        }

        Ok(())
    }

    #[cfg(not(feature = "bls"))]
    pub fn verify_bls_managed(
        &self,
        _key_handle: RawHandle,
        _message_handle: RawHandle,
        _signature_handle: RawHandle,
    ) -> Result<(), VMHooksEarlyExit> {
        panic!(
            "BLS support is not enabled. Add the `bls` feature to `multiversx-sc-scenario` to enable it"
        );
    }

    #[cfg(feature = "bls")]
    pub fn verify_bls_aggregated_signature(
        &self,
        key_handle: RawHandle,
        message_handle: RawHandle,
        signature_handle: RawHandle,
    ) -> Result<(), VMHooksEarlyExit> {
        let types = self.context.m_types_lock();
        let (keys, _) = types.mb_get_vec_of_bytes(key_handle);
        let message = types.mb_get(message_handle);
        let signature = types.mb_get(signature_handle);
        let sig_valid =
            crate::crypto_functions_bls::verify_bls_aggregated_signature(keys, message, signature);
        if !sig_valid {
            return Err(early_exit_vm_error("bls verify error"));
        }

        Ok(())
    }

    #[cfg(not(feature = "bls"))]
    pub fn verify_bls_aggregated_signature(
        &self,
        _key_handle: RawHandle,
        _message_handle: RawHandle,
        _signature_handle: RawHandle,
    ) -> Result<(), VMHooksEarlyExit> {
        panic!(
            "BLS support is not enabled. Add the `bls` feature to `multiversx-sc-scenario` to enable it"
        );
    }

    #[cfg(feature = "bls")]
    pub fn verify_bls_signature_share(
        &self,
        key_handle: RawHandle,
        message_handle: RawHandle,
        signature_handle: RawHandle,
    ) -> Result<(), VMHooksEarlyExit> {
        let types = self.context.m_types_lock();
        let key = types.mb_get(key_handle);
        let message = types.mb_get(message_handle);
        let signature = types.mb_get(signature_handle);

        let sig_valid =
            crate::crypto_functions_bls::verify_bls_signature_share(key, message, signature);
        if !sig_valid {
            return Err(early_exit_vm_error("bls verify error"));
        }

        Ok(())
    }

    #[cfg(not(feature = "bls"))]
    pub fn verify_bls_signature_share(
        &self,
        _key_handle: RawHandle,
        _message_handle: RawHandle,
        _signature_handle: RawHandle,
    ) -> Result<(), VMHooksEarlyExit> {
        panic!(
            "BLS support is not enabled. Add the `bls` feature to `multiversx-sc-scenario` to enable it"
        );
    }
}