xprogram 0.1.0

program for testing
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 crate::util::str_pack;
use solana_program::pubkey::Pubkey;
use solana_program::{
    instruction::AccountMeta, instruction::Instruction, program_error::ProgramError,
};
use std::mem::size_of;
use std::str::from_utf8;

pub enum TopicInstruction<'a> {
    CreateTopic {
        topic_name: &'a str,
        option_name: &'a str,
    },
    AddOption {
        option_name: &'a str,
    },
    VoteTopic {
        opt_idx: u8,
    },
    FinishTopic,
}

impl<'a> TopicInstruction<'a> {
    pub fn unpack(input: &'a [u8]) -> Result<Self, ProgramError> {
        use ProgramError::InvalidInstructionData;
        let (&tag, rest) = input.split_first().ok_or(InvalidInstructionData)?;

        Ok(match tag {
            0 => {
                let mut split_index: usize = 0;
                for (i, char) in rest.iter().enumerate() {
                    if *char == '|' as u8 {
                        split_index = i;
                        break;
                    }
                }
                let (topic_name, option_name) = rest.split_at(split_index);
                let (_, option_name) = option_name.split_first().ok_or(InvalidInstructionData)?;
                let topic_name = from_utf8(topic_name).unwrap();
                let option_name = from_utf8(option_name).unwrap();
                Self::CreateTopic {
                    topic_name,
                    option_name,
                }
            }
            1 => {
                let option_name = from_utf8(rest).unwrap();
                Self::AddOption { option_name }
            }
            2 => {
                let opt_idx = rest[0];
                Self::VoteTopic { opt_idx }
            }
            3 => Self::FinishTopic,
            _ => return Err(InvalidInstructionData),
        })
    }

    pub fn pack(&self) -> Vec<u8> {
        let mut buf: Vec<u8> = Vec::with_capacity(size_of::<Self>());
        match *self {
            Self::CreateTopic {
                topic_name,
                option_name,
            } => {
                buf.push(0);
                buf.extend_from_slice(topic_name.as_bytes());
                buf.push('|' as u8);
                buf.extend_from_slice(option_name.as_bytes());
            }
            Self::AddOption { option_name } => {
                buf.push(1);
                buf.extend_from_slice(option_name.as_bytes());
            }
            Self::VoteTopic { opt_idx } => {
                buf.push(2);
                buf.push(opt_idx);
            }
            Self::FinishTopic => {
                buf.push(3);
            }
        }
        buf
    }
}

pub fn create_topic(
    program_id: &Pubkey,
    topic: &Pubkey,
    topic_owner: &Pubkey,
    topic_name: &str,
    option_name: &str,
) -> Result<Instruction, ProgramError> {
    let data = TopicInstruction::CreateTopic {
        topic_name,
        option_name,
    }
    .pack();
    let accounts = vec![
        AccountMeta::new(*topic, false),
        AccountMeta::new(*topic_owner, true),
    ];

    Ok(Instruction {
        program_id: *program_id,
        accounts,
        data,
    })
}

pub fn add_option(
    program_id: &Pubkey,
    topic: &Pubkey,
    option_adder: &Pubkey,
    option_name: &str,
) -> Result<Instruction, ProgramError> {
    let data = TopicInstruction::AddOption { option_name }.pack();
    let accounts = vec![
        AccountMeta::new(*topic, false),
        AccountMeta::new(*option_adder, true),
    ];

    Ok(Instruction {
        program_id: *program_id,
        accounts,
        data,
    })
}

pub fn vote_topic(
    program_id: &Pubkey,
    topic: &Pubkey,
    voter: &Pubkey,
    opt_idx: u8,
) -> Result<Instruction, ProgramError> {
    let data = TopicInstruction::VoteTopic { opt_idx }.pack();
    let accounts = vec![
        AccountMeta::new(*topic, false),
        AccountMeta::new(*voter, true),
    ];

    Ok(Instruction {
        program_id: *program_id,
        accounts,
        data,
    })
}

pub fn finish_topic(
    program_id: &Pubkey,
    topic: &Pubkey,
    topic_owner: &Pubkey,
) -> Result<Instruction, ProgramError> {
    let data = TopicInstruction::FinishTopic.pack();
    let accounts = vec![
        AccountMeta::new(*topic, false),
        AccountMeta::new(*topic_owner, true),
    ];

    Ok(Instruction {
        program_id: *program_id,
        accounts,
        data,
    })
}