Struct Budget 

pub struct Budget {
    pub amount: u64,
    pub unit: String,
    pub decimals: u32,
}

amount / 10^decimals in unit: {"amount": 300000, "unit": "USD", "decimals": 2} is $3,000.00.

Fields

amount: u64

In the unit’s smallest denomination at decimals.

unit: String

An ISO 4217 currency code, or any unit both sides agree on.

decimals: u32

How many of amount’s digits are after the decimal point.

Implementations

impl Budget

pub fn new(amount: u64, unit: impl Into<String>, decimals: u32) -> Self

A budget of amount in unit at decimals.

pub fn from_value(value: Option<&Value>) -> Result<Option<Self>>

A budget from a JSON claim: None when absent or null, and an error for anything that is not {amount, unit, decimals} with non-negative integers no larger than 2^53 - 1.

let claim = serde_json::json!({ "amount": 300000, "unit": "USD", "decimals": 2 });
assert_eq!(Budget::from_value(Some(&claim))?, Some(Budget::new(300_000, "USD", 2)));
assert_eq!(Budget::from_value(None)?, None);
assert!(Budget::from_value(Some(&serde_json::json!("$3000"))).is_err());

pub fn same_scale(&self, other: &Budget) -> bool

Whether two budgets count in the same unit at the same scale, so that one can be spent from the other.

Trait Implementations

impl Clone for Budget

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Budget

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Budget

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Budget

impl Hash for Budget

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Budget

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for Budget

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Budget