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HMAC-SHA256 and HMAC-SHA512 for data integrity and authenticity. 
import { HMACService, HMACLive } from 'voltaire-effect/crypto'
import { Effect } from 'effect'

const mac = await Effect.runPromise(
  Effect.gen(function* () {
    const hmac = yield* HMACService
    return yield* hmac.sha256(key, message)
  }).pipe(Effect.provide(HMACLive))
)
// 32 bytes for SHA256, 64 bytes for SHA512

​
Standalone Functions

import { hmacSha256, hmacSha512, HMACLive } from 'voltaire-effect/crypto'

const mac256 = await Effect.runPromise(hmacSha256(key, message).pipe(Effect.provide(HMACLive)))
const mac512 = await Effect.runPromise(hmacSha512(key, message).pipe(Effect.provide(HMACLive)))

​
Testing

import { HMACTest } from 'voltaire-effect/crypto'
myProgram.pipe(Effect.provide(HMACTest))
// Returns zero-filled arrays

​
Interface

interface HMACServiceShape {
  readonly sha256: (key: Uint8Array, message: Uint8Array) => Effect.Effect<HMACType>
  readonly sha512: (key: Uint8Array, message: Uint8Array) => Effect.Effect<HMACType>
}