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

use std::{fs::File, io::Write};

use multiversx_sc::abi::ContractAbi;

use super::snippet_gen_common::write_newline;

pub(crate) fn write_snippet_imports(file: &mut File) {
    writeln!(
        file,
        "#![allow(non_snake_case)]

mod proxy;

use multiversx_sc_snippets::imports::*;
use multiversx_sc_snippets::sdk;
use serde::{{Deserialize, Serialize}};
use std::{{
    io::{{Read, Write}},
    path::Path,
}};
"
    )
    .unwrap();

    write_newline(file);
}

pub(crate) fn write_snippet_constants(file: &mut File) {
    writeln!(
        file,
        "const GATEWAY: &str = sdk::blockchain::DEVNET_GATEWAY;
const STATE_FILE: &str = \"state.toml\";
"
    )
    .unwrap();

    write_newline(file);
}

pub(crate) fn write_snippet_main_function(file: &mut File, abi: &ContractAbi) {
    writeln!(
        file,
        "#[tokio::main]
async fn main() {{
    env_logger::init();

    let mut args = std::env::args();
    let _ = args.next();
    let cmd = args.next().expect(\"at least one argument required\");
    let mut interact = ContractInteract::new().await;
    match cmd.as_str() {{"
    )
    .unwrap();

    // all contracts have a deploy snippet
    writeln!(file, r#"        "deploy" => interact.deploy().await,"#).unwrap();

    for upgrade_endpoint in &abi.upgrade_constructors {
        writeln!(
            file,
            r#"        "{}" => interact.{}().await,"#,
            upgrade_endpoint.name, upgrade_endpoint.rust_method_name
        )
        .unwrap();
    }

    for endpoint in &abi.endpoints {
        writeln!(
            file,
            r#"        "{}" => interact.{}().await,"#,
            endpoint.name, endpoint.rust_method_name
        )
        .unwrap();
    }

    // general case of "command not found" + close curly brackets
    writeln!(
        file,
        "        _ => panic!(\"unknown command: {{}}\", &cmd),
    }}
}}"
    )
    .unwrap();

    write_newline(file);
}

pub(crate) fn write_interact_struct_declaration(file: &mut File) {
    writeln!(
        file,
        "struct ContractInteract {{
    interactor: Interactor,
    wallet_address: Address,
    contract_code: BytesValue,
    state: State
}}"
    )
    .unwrap();

    write_newline(file);
}

pub(crate) fn write_state_struct_declaration(file: &mut File) {
    writeln!(
        file,
        "
#[derive(Debug, Default, Serialize, Deserialize)]
struct State {{
    contract_address: Option<Bech32Address>
}}"
    )
    .unwrap();

    write_newline(file);
}

pub(crate) fn write_snippet_state_impl(file: &mut File) {
    writeln!(
        file,
        r#"impl State {{
        // Deserializes state from file
        pub fn load_state() -> Self {{
            if Path::new(STATE_FILE).exists() {{
                let mut file = std::fs::File::open(STATE_FILE).unwrap();
                let mut content = String::new();
                file.read_to_string(&mut content).unwrap();
                toml::from_str(&content).unwrap()
            }} else {{
                Self::default()
            }}
        }}
    
        /// Sets the contract address
        pub fn set_address(&mut self, address: Bech32Address) {{
            self.contract_address = Some(address);
        }}
    
        /// Returns the contract address
        pub fn current_address(&self) -> &Bech32Address {{
            self.contract_address
                .as_ref()
                .expect("no known contract, deploy first")
        }}
    }}
    
    impl Drop for State {{
        // Serializes state to file
        fn drop(&mut self) {{
            let mut file = std::fs::File::create(STATE_FILE).unwrap();
            file.write_all(toml::to_string(self).unwrap().as_bytes())
                .unwrap();
        }}
    }}"#
    )
    .unwrap();

    write_newline(file);
}