Amazon S3 Control

Local emulators. Real API contracts. Part of Mockingbird.

Transport scaffold for Amazon S3 Control. ESM; Node 22+ or Bun 1.2+.

#Usage

import { ListAccessPointsCommand, S3ControlClient } from "@aws-sdk/client-s3-control"
import { createServer } from "@crvouga/mockingbird-service-s3-control/server"

// Test setup: start the emulator and point the SDK's endpoint at it. The S3 Control SDK
// prefixes the account ID to the endpoint host, so listen on a name, not an IP address.
const server = await createServer({ host: "localhost" })
const s3control = new S3ControlClient({
  endpoint: server.url,
  region: "us-east-1",
  credentials: { accessKeyId: "fixture", secretAccessKey: "fixture" },
})

// Application code: the S3 Control SDK calls it already makes.
// No operation is implemented yet, so every call rejects.
try {
  await s3control.send(new ListAccessPointsCommand({ AccountId: "000000000000" }))
} catch (error) {
  console.log((error as Error).name) // UnknownOperationException
}

await server.close()

State lives in SQLite collections and participates in the shared runtime's namespace isolation, reset, timeline, clock, journal, metrics and fault controls. No AWS account is needed.

Planned, not implemented, AWS operations: PutPublicAccessBlock, GetPublicAccessBlock, DeletePublicAccessBlock, CreateAccessPoint, GetAccessPoint, ListAccessPoints, DeleteAccessPoint, PutAccessPointPolicy, GetAccessPointPolicy, DeleteAccessPointPolicy.

Operations outside this list fail explicitly. This package emulates API state, not AWS infrastructure, production quotas, billing, IAM enforcement, or provider consoles. Service-specific omissions and oracle evidence are recorded in the AWS coverage ledger.

Run bun run parity with LocalStack on http://127.0.0.1:4566; an unavailable oracle fails the run. No LocalStack run is recorded for this integration. The parity command is a bounded read-only SDK envelope probe, not proof of full vendor equivalence.

#Implementation status

No vendor operations are implemented. Requests fail explicitly with UnknownOperationException; transport tests cover this boundary and malformed input. This package is not a usable vendor replacement yet. No LocalStack or live AWS parity is claimed.

#Install

bun add @crvouga/mockingbird-service-s3-control

#API

• S3ControlAPI(options?): low-level AWS transport instance with fetch and reset.

• createRuntime(options?): in-process Fetch API and shared state controls.

• createServer(options?) from the /server entry: HTTP listener with url, runtime, and close().

• document, operationIds, and supportedOperationIds: generated transport contract metadata.