Money and banking

Amounts of money, prices, rates, cards and bank accounts.

Topics

Use Money for an amount of money and Currency for its currency.

These types hold a price, a discount, a price per kilogram or litre, and the rates a business quotes: tax, basis points and interest.

Exchange rates

An ExchangeRate says how much one currency is worth in another at a moment, so you can convert an amount.

Bank accounts

A BankAccount holds the details a payment to a bank account needs.

Types

Type	What it is
`Money`	An amount of money: a whole number of a currency's smallest units, and the currency.
`Currency`	A currency, by its three-letter code: `GBP`.
`ExchangeRate`	A rate between two currencies at a moment in time.
`Price`	An amount, and whether it includes tax.
`UnitPrice`	A price per amount of something, such as £2.50 per kilo.
`TaxRate`	A rate of tax, as a percentage that can't be below zero: `20%`.
`Discount`	An amount off a price, or a percentage off it.
`BasisPoints`	A count of hundredths of a percent: 25 basis points is 0.25%.
`InterestRate`	A yearly rate of interest, and the basis it is quoted on: `5.5% APR`.
`PaymentCardNumber`	A payment card's full number, checked by its check digit.
`MaskedCardNumber`	What you may keep of a card once its number is gone: the brand and the last four digits.
`CardBrand`	A card scheme: `visa`, `mastercard`, `american_express` and so on.
`CardBin`	The first 6 or 8 digits of a card number, which name its issuer.
`CardExpiry`	The month a payment card runs to, written `2028-12`.
`PaymentReference`	The reference a payer sees on a UK bank payment: up to 18 characters.
`InvoiceNumber`	An invoice's number: up to 200 characters, as your own system writes it.
`Iban`	An international bank account number, with its check digits: `GB29NWBK60161331926819`.
`Bic`	A bank's identifier code, also called a SWIFT code: 8 or 11 characters.
`UkSortCode`	A UK bank's sort code, as six digits: `089999`.
`UkAccountNumber`	A UK bank account number: eight digits, with any leading zeros kept.
`BankAccount`	A bank account to pay into or take from, in any country.
`AbaRoutingNumber`	A US bank's routing number: nine digits with a check digit.
`Lei`	A Legal Entity Identifier, the global ID of a company in financial reporting.
`Isin`	A securities identification number, naming a share or a bond: `US0378331005`.
`InterestRateBasis`	What an interest rate is quoted as: `aer`, `apr` or `flat`.