An extension library for kotlin-retry that provides retry functionality for Arrow's Either type.

This library extends kotlin-retry to handle Arrow's Either return types, making it easier to implement retry logic for operations that return Either<E, A>. It's particularly useful when you need to retry operations that may fail but use Either for error handling instead of exceptions.

Add the following dependency to your build.gradle.kts or build.gradle file:

dependencies {
    implementation("com.michael-bull.kotlin-retry:kotlin-retry:2.0.1")
    implementation("com.jsoizo:kotlin-retry-arrow-either:0.1.0")
}

The library provides a retry function that works similarly to the one provided by kotlin-retry, but it expects a function that returns an Either<E, A> instead of a function that throws an exception.
Retry policies are defined using the functions provided by kotlin-retry, such as constantDelay, binaryExponentialBackoff, etc.

import arrow.core.Either
import com.github.michaelbull.retry.policy.stopAtAttempts
import com.jsoizo.retryeither.retry

val fiveTimes = stopAtAttempts<AttemptsError>(5)

suspend fun fetchData(): Either<FetchError, Data> = 
    retry(retryPolicy = fiveTimes) {
        // Call an API that returns Either<FetchError, Data>
        callApi()
    }

• Kotlin: 2.1+
• Arrow: 2.0+
• kotlin-retry: 2.0+

This library is released under the MIT License. See LICENSE for details.