astro4nit/
token.rs

1use schemars::JsonSchema;
2use serde::{Deserialize, Serialize};
3
4use cosmwasm_std::{StdError, StdResult, Uint128};
5use cw20::{Cw20Coin, MinterResponse};
6
7/// ## Description
8/// This structure describes the parameters used for creating a token contract.
9/// TokenContract InstantiateMsg
10#[derive(Serialize, Deserialize, JsonSchema)]
11pub struct InstantiateMsg {
12    /// Token name
13    pub name: String,
14    /// Token symbol
15    pub symbol: String,
16    /// The amount of decimals the token has
17    pub decimals: u8,
18    /// Initial token balances
19    pub initial_balances: Vec<Cw20Coin>,
20    /// Minting controls specified in a [`MinterResponse`] structure
21    pub mint: Option<MinterResponse>,
22}
23
24/// ## Description
25/// This structure describes a migration message.
26/// We currently take no arguments for migrations.
27#[derive(Serialize, Deserialize, JsonSchema)]
28pub struct MigrateMsg {}
29
30impl InstantiateMsg {
31    pub fn get_cap(&self) -> Option<Uint128> {
32        self.mint.as_ref().and_then(|v| v.cap)
33    }
34
35    pub fn validate(&self) -> StdResult<()> {
36        // Check name, symbol, decimals
37        if !is_valid_name(&self.name) {
38            return Err(StdError::generic_err(
39                "Name is not in the expected format (3-50 UTF-8 bytes)",
40            ));
41        }
42        if !is_valid_symbol(&self.symbol) {
43            return Err(StdError::generic_err(
44                "Ticker symbol is not in expected format [a-zA-Z\\-]{3,12}",
45            ));
46        }
47        if self.decimals > 18 {
48            return Err(StdError::generic_err("Decimals must not exceed 18"));
49        }
50        Ok(())
51    }
52}
53
54/// ## Description
55/// Checks the validity of the token name
56/// ## Params
57/// * **name** is an object of type [`str`]. It is the token name to check
58fn is_valid_name(name: &str) -> bool {
59    let bytes = name.as_bytes();
60    if bytes.len() < 3 || bytes.len() > 50 {
61        return false;
62    }
63    true
64}
65
66/// ## Description
67/// Checks the validity of the token symbol
68/// ## Params
69/// * **symbol** is an object of type [`str`]. It is the token symbol to check
70fn is_valid_symbol(symbol: &str) -> bool {
71    let bytes = symbol.as_bytes();
72    if bytes.len() < 3 || bytes.len() > 12 {
73        return false;
74    }
75    for byte in bytes.iter() {
76        if (*byte != 45) && (*byte < 65 || *byte > 90) && (*byte < 97 || *byte > 122) {
77            return false;
78        }
79    }
80    true
81}
astro4nit/token.rs

astro4nit/
token.rs
