84 lines
4.1 KiB
Markdown
84 lines
4.1 KiB
Markdown
[](http://opensource.org/licenses/BSD-3-Clause) [](https://github.com/ethauvin/cryptoprice/releases/latest) [](https://search.maven.org/search?q=g:%22net.thauvin.erik%22%20AND%20a:%22cryptoprice%22) [](https://oss.sonatype.org/content/repositories/snapshots/net/thauvin/erik/cryptoprice/)
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[](https://snyk.io/test/github/ethauvin/cryptoprice?targetFile=pom.xml) [](https://sonarcloud.io/dashboard?id=ethauvin_cryptoprice) [](https://github.com/ethauvin/cryptoprice/actions/workflows/gradle.yml) [](https://circleci.com/gh/ethauvin/cryptoprice/tree/master)
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# Retrieve cryptocurrencies current prices
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A simple Kotlin/Java/Android implementation of the spot price [Coinbase Public API](https://developers.coinbase.com/api/v2#get-spot-price).
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## Examples (TL;DR)
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```kotlin
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import net.thauvin.erik.crypto.CryptoPrice.Companion.spotPrice
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// ...
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val btc = spotPrice("BTC") // Bitcoin
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println(btc.amount)
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val eth = spotPrice("ETH", "EUR") // Ethereum in Euros
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println(eth.amount)
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```
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- View [Kotlin](https://github.com/ethauvin/cryptoprice/blob/master/examples/src/main/kotlin/com/example/CryptoPriceExample.kt) or [Java](https://github.com/ethauvin/cryptoprice/blob/master/examples/src/main/java/com/example/CryptoPriceSample.java) Examples.
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### Spot Price
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The `spotPrice` function defines the following parameters:
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```kotlin
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spotPrice(
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base: String, // Required
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currency: String = "USD",
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date: LocalDate? = null,
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)
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```
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Parameters | Description
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:---------- |:-------------------------------------------------------------
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`base` | The cryptocurrency ticker symbol (`BTC`, `ETH`, `ETH2`, etc.)
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`currency` | The fiat currency ISO 4217 code. (`USD`, `GBP`, `EUR`, etc.)
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`date` | The `LocalDate` for historical price data.
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A `CryptoPrice` is returned defined as follows:
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```kotlin
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CryptoPrice(val base: String, val currency: String, val amount: BigDecimal)
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```
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The parameter names match the [Coinbase API](https://developers.coinbase.com/api/v2#get-spot-price).
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To display the amount as a fomatted currency use the `toCurrency` function:
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```kotlin
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val euro = CryptoPrice("BTC", "EUR", 12345.67.toBigDecimal())
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println(euro.toCurrency()) // will print: €12,345.67
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val krone = CryptoPrice("BTC", "DKK", 12345.67.toBigDecimal())
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println(krone.toCurrency(Locale("da", "DK"))) // will print: 12.345,67 kr.
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```
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### Extending
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A generic `apiCall()` function is available to access other [API data endpoints](https://developers.coinbase.com/api/v2#data-endpoints). For example to retried the current [buy price](https://developers.coinbase.com/api/v2#get-buy-price) of a cryptocurrency:
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```kotlin
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apiCall(paths = listOf("prices", "BTC-USD", "buy"), params = emptyMap())
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```
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will return something like:
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```json
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{"data":{"base":"BTC","currency":"USD","amount":"58977.17"}}
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```
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See the [examples](https://github.com/ethauvin/cryptoprice/blob/master/examples/) for more details.
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### Gradle, Maven, etc.
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To use with [Gradle](https://gradle.org/), include the following dependency in your [build](https://github.com/ethauvin/cryptoprice/blob/master/examples/build.gradle.kts) file:
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```gradle
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dependencies {
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implementation("net.thauvin.erik:cryptoprice:0.9.0")
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}
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```
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Instructions for using with Maven, Ivy, etc. can be found on [Maven Central](https://search.maven.org/artifact/net.thauvin.erik/cryptoprice/0.9.0/jar).
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