atlas_token/
lib.rs

1#![allow(clippy::arithmetic_side_effects)]
2#![deny(missing_docs)]
3#![cfg_attr(not(test), forbid(unsafe_code))]
4
5//! An ERC20-like Token program for the Atlas blockchain
6
7pub mod error;
8pub mod instruction;
9pub mod native_mint;
10pub mod processor;
11pub mod state;
12
13#[cfg(not(feature = "no-entrypoint"))]
14mod entrypoint;
15
16/// Export current sdk types for downstream users building with a different sdk
17/// version
18pub mod atlas_program {
19    #![allow(missing_docs)]
20    pub mod entrypoint {
21        pub use atlas_program_error::ProgramResult;
22    }
23    pub mod instruction {
24        pub use atlas_instruction::{AccountMeta, Instruction};
25    }
26    pub mod program_error {
27        pub use atlas_program_error::ProgramError;
28    }
29    pub mod program_option {
30        pub use atlas_program_option::COption;
31    }
32    pub mod program_pack {
33        pub use atlas_program_pack::{IsInitialized, Pack, Sealed};
34    }
35    pub mod pubkey {
36        pub use atlas_pubkey::{Pubkey, PUBKEY_BYTES};
37    }
38}
39use atlas_program_error::ProgramError;
40// Re-export atlas_token_interface items
41pub use atlas_token_interface::{check_id, check_program_account, id, ID};
42
43/// Convert the UI representation of a token amount (using the decimals field
44/// defined in its mint) to the raw amount
45pub fn ui_amount_to_amount(ui_amount: f64, decimals: u8) -> u64 {
46    (ui_amount * 10_usize.pow(decimals as u32) as f64) as u64
47}
48
49/// Convert a raw amount to its UI representation (using the decimals field
50/// defined in its mint)
51pub fn amount_to_ui_amount(amount: u64, decimals: u8) -> f64 {
52    amount as f64 / 10_usize.pow(decimals as u32) as f64
53}
54
55/// Convert a raw amount to its UI representation (using the decimals field
56/// defined in its mint)
57pub fn amount_to_ui_amount_string(amount: u64, decimals: u8) -> String {
58    let decimals = decimals as usize;
59    if decimals > 0 {
60        // Left-pad zeros to decimals + 1, so we at least have an integer zero
61        let mut s = format!("{:01$}", amount, decimals + 1);
62        // Add the decimal point (Sorry, "," locales!)
63        s.insert(s.len() - decimals, '.');
64        s
65    } else {
66        amount.to_string()
67    }
68}
69
70/// Convert a raw amount to its UI representation using the given decimals field
71/// Excess zeroes or unneeded decimal point are trimmed.
72pub fn amount_to_ui_amount_string_trimmed(amount: u64, decimals: u8) -> String {
73    let mut s = amount_to_ui_amount_string(amount, decimals);
74    if decimals > 0 {
75        let zeros_trimmed = s.trim_end_matches('0');
76        s = zeros_trimmed.trim_end_matches('.').to_string();
77    }
78    s
79}
80
81/// Try to convert a UI representation of a token amount to its raw amount using
82/// the given decimals field
83pub fn try_ui_amount_into_amount(ui_amount: String, decimals: u8) -> Result<u64, ProgramError> {
84    let decimals = decimals as usize;
85    let mut parts = ui_amount.split('.');
86    // splitting a string, even an empty one, will always yield an iterator of
87    // at least length == 1
88    let mut amount_str = parts.next().unwrap().to_string();
89    let after_decimal = parts.next().unwrap_or("");
90    let after_decimal = after_decimal.trim_end_matches('0');
91    if (amount_str.is_empty() && after_decimal.is_empty())
92        || parts.next().is_some()
93        || after_decimal.len() > decimals
94    {
95        return Err(ProgramError::InvalidArgument);
96    }
97
98    amount_str.push_str(after_decimal);
99    for _ in 0..decimals.saturating_sub(after_decimal.len()) {
100        amount_str.push('0');
101    }
102    amount_str
103        .parse::<u64>()
104        .map_err(|_| ProgramError::InvalidArgument)
105}
atlas_token/lib.rs

atlas_token/
lib.rs
