/**
 * Presigned URL resolver for the Constructive presigned URL plugin.
 *
 * Reads CDN/S3 configuration from the standard env system
 * (getEnvOptions → pgpmDefaults + config files + env vars) and lazily
 * initializes an S3Client on first use.
 *
 * Also provides a per-database bucket name resolver that derives the
 * S3 bucket name from the database UUID + a configurable prefix.
 *
 * Follows the same lazy-init pattern as upload-resolver.ts.
 */
import type { S3Config, BucketNameResolver, EnsureBucketProvisioned } from 'graphile-presigned-url-plugin';
/**
 * Lazily initialize and return the S3Config for the presigned URL plugin.
 *
 * Reads CDN config on first call via getEnvOptions() (which already merges
 * pgpmDefaults → config file → env vars), creates an S3Client, and caches
 * the result. Same CDN config as upload-resolver.ts.
 *
 * NOTE: The `bucket` field here is the global fallback bucket name
 * (from BUCKET_NAME env var). When `resolveBucketName` is provided,
 * per-database bucket names take precedence for all S3 operations.
 */
export declare function getPresignedUrlS3Config(): S3Config;
/**
 * Create a per-(database, bucketKey) bucket name resolver.
 *
 * Uses the BUCKET_NAME env var as a prefix. For each (database, bucketKey)
 * pair, the S3 bucket name becomes `{prefix}-{bucketKey}-{databaseId}`
 * (e.g., "myapp-public-abc123def456").
 *
 * This aligns with the bucket provisioner plugin which creates separate
 * S3 buckets per logical bucket key.
 */
export declare function createBucketNameResolver(): BucketNameResolver;
/**
 * Resolve CORS allowed origins from the env/config system.
 *
 * Reads SERVER_ORIGIN from the standard env hierarchy
 * (pgpmDefaults → config file → env vars) and wraps it in an array.
 * Falls back to ['http://localhost:3000'] for local development.
 */
export declare function getAllowedOrigins(): string[];
/**
 * Create a lazy bucket provisioner callback for the presigned URL plugin.
 *
 * On the first upload to an S3 bucket that doesn't exist yet, this callback
 * uses the BucketProvisioner to create and fully configure the bucket
 * (Block Public Access, CORS, policies, lifecycle rules for temp buckets).
 *
 * Uses the same S3 connection config as the bucket provisioner plugin
 * (getBucketProvisionerConnection) and reads CORS origins from
 * SERVER_ORIGIN env var (falls back to localhost for local dev).
 */
export declare function createEnsureBucketProvisioned(): EnsureBucketProvisioned;