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+---
+title: Data Types
+description: Introduction to Data Types
+draft: true
+nav:
+  path: API
+  order: 4
+---
+
+## Timestamp
+
+A point in time, usually with millisecond precision, represented as an
+[ISO 8601](https://en.wikipedia.org/wiki/ISO_8601) date string (eg "2021-06-11T02:51:11.000Z"). Timestamps
+are in the UTC timezone as denoted by the "Z" suffix.
+
+## BigNumber
+
+A number, represented as a String, which can have arbitrary size or precision.
+Most Centrapay APIs that deal with transactable value (ie. assets, payments,
+etc) represent the value as BigNumbers. Depending on the context, a BigNumber
+may be used to represent an integer or a decimal amount.
+
+## Monetary
+
+A monetary amount in a currency, represented as an Object. The amount is
+usually an integer in the smallest denomination for the currency (ie cents) but
+may be a decimal value for some currencies (eg Bitcoin). The currency is
+typically represented as an [ISO 4217](https://en.wikipedia.org/wiki/ISO_4217) code.
+
+### Fields
+
+|   Name   |          Type           |                        Description                         |
+| -------- | ----------------------- | ---------------------------------------------------------- |
+| amount   | [BigNumber](#bignumber) | Value in the currency's smallest denomination (eg. cents). |
+| currency | String                  | Currency code (eg. "NZD").                                 |
+
+## CRN
+
+A Centrapay Resource Name (CRN) is a colon-delimited String that uniquely
+identifies any Centrapay resource.
+
+The format is `crn:{account}:{type}:{id}` where "account" is the optional
+Centrapay account that owns the resource, "type" is the resource type, and "id"
+is the resource identifier.
+
+CRN is often used to refer to Users and API keys. For example:
+* **User:** crn::user:e2837e88-d408-11eb-8eac-3e22fb52e878
+* **API Key:** crn:1234abc:api-key:MyAccountOwner
+
+## Location
+
+A location's represented as an Object with properties to denote the location both absolute and
+by locality.
+
+### Required Fields
+
+|  Name   |  Type  |                                      Description                                       |
+| ------- | ------ | -------------------------------------------------------------------------------------- |
+| street  | String | Unit, number, and name of street address.                                              |
+| city    | String | City of location.                                                                      |
+| country | String | [ISO 3166](https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2) Country code. (eg. "NZ"). |
+
+### Optional Fields
+|   Name   |  Type  |                                                  Description                                                  |
+| -------- | ------ | ------------------------------------------------------------------------------------------------------------- |
+| lat      | Number | Absolute latitude coordinate. If you don't provide this, we will automatically infer this from your address.  |
+| lng      | Number | Absolute longitude coordinate. If you don't provide this, we will automatically infer this from your address. |
+| suburb   | String | Suburb of location.                                                                                           |
+| postCode | String | Post or Zip code of location.                                                                                 |
+| state    | String | The state or region of the location (eg. "Auckland").                                                         |
+
+## PhoneNumber
+
+A phone number, represented in [E.123](https://en.wikipedia.org/wiki/E.123) international notation (eg "+6421537663"). We usually use this for receiving text messages.