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use schemars::JsonSchema;
use serde::{Deserialize, Serialize};
use std::fmt;
use crate::math::Uint128;
#[derive(Serialize, Deserialize, Clone, Default, Debug, PartialEq, Eq, JsonSchema)]
pub struct Coin {
pub denom: String,
pub amount: Uint128,
}
impl Coin {
pub fn new(amount: u128, denom: impl Into<String>) -> Self {
Coin {
amount: Uint128::new(amount),
denom: denom.into(),
}
}
}
impl fmt::Display for Coin {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}{}", self.amount, self.denom)
}
}
pub fn coins(amount: u128, denom: impl Into<String>) -> Vec<Coin> {
vec![coin(amount, denom)]
}
pub fn coin(amount: u128, denom: impl Into<String>) -> Coin {
Coin::new(amount, denom)
}
pub fn has_coins(coins: &[Coin], required: &Coin) -> bool {
coins
.iter()
.find(|c| c.denom == required.denom)
.map(|m| m.amount >= required.amount)
.unwrap_or(false)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn coin_implements_display() {
let a = Coin {
amount: Uint128::new(123),
denom: "ucosm".to_string(),
};
let embedded = format!("Amount: {}", a);
assert_eq!(embedded, "Amount: 123ucosm");
assert_eq!(a.to_string(), "123ucosm");
}
#[test]
fn coin_works() {
let a = coin(123, "ucosm");
assert_eq!(
a,
Coin {
amount: Uint128::new(123),
denom: "ucosm".to_string()
}
);
let zero = coin(0, "ucosm");
assert_eq!(
zero,
Coin {
amount: Uint128::new(0),
denom: "ucosm".to_string()
}
);
let string_denom = coin(42, String::from("ucosm"));
assert_eq!(
string_denom,
Coin {
amount: Uint128::new(42),
denom: "ucosm".to_string()
}
);
}
#[test]
fn coins_works() {
let a = coins(123, "ucosm");
assert_eq!(
a,
vec![Coin {
amount: Uint128::new(123),
denom: "ucosm".to_string()
}]
);
let zero = coins(0, "ucosm");
assert_eq!(
zero,
vec![Coin {
amount: Uint128::new(0),
denom: "ucosm".to_string()
}]
);
let string_denom = coins(42, String::from("ucosm"));
assert_eq!(
string_denom,
vec![Coin {
amount: Uint128::new(42),
denom: "ucosm".to_string()
}]
);
}
#[test]
fn has_coins_matches() {
let wallet = vec![coin(12345, "ETH"), coin(555, "BTC")];
assert!(has_coins(&wallet, &coin(777, "ETH")));
}
}