Initial commit

shared/types/drop.ts

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+export const PROTOCOL_VERSION = 2 as const;
+export const CHUNK_SIZE = 8 * 1024 * 1024;
+export const GCM_TAG_BYTES = 16;
+export const MAX_CHUNK_BODY = CHUNK_SIZE + GCM_TAG_BYTES;
+export const MAX_MANIFEST_PLAINTEXT = 64 * 1024;
+export const MAX_MANIFEST_BODY = MAX_MANIFEST_PLAINTEXT + GCM_TAG_BYTES;
+export const UPLOAD_RESERVATION_MS = 24 * 60 * 60 * 1000;
+export const LEASE_IDLE_MS = 15 * 60 * 1000;
+export const BLOB_WARNING_BYTES = 100 * 1024 * 1024;
+export const BLOB_FALLBACK_MAX_BYTES = 256 * 1024 * 1024;
+export const PREVIEW_MAX_BYTES = 25 * 1024 * 1024;
+export const EXPIRY_VALUES = ["1h", "2h", "6h", "12h", "24h", "7d"] as const;
+export type ExpiryChoice = (typeof EXPIRY_VALUES)[number];
+export const READ_VALUES = [1, 5, 10, 20, 50, 100] as const;
+export type ReadChoice = (typeof READ_VALUES)[number] | null;
+export const DEFAULT_EXPIRY: ExpiryChoice = "24h";
+export const DEFAULT_READS: ReadChoice = 1;
+export type DropState = "uploading" | "ready";
+export interface ReserveRequest {
+  version: 2;
+  chunkSize: number;
+  chunkCount: number;
+  noncePrefix: string;
+  expiresIn: ExpiryChoice;
+  maxReads: ReadChoice;
+}
+export interface ReserveResponse {
+  id: string;
+  uploadExpiresAt: string;
+}
+export interface PublicDescriptor {
+  version: 2;
+  id: string;
+  chunkSize: number;
+  chunkCount: number;
+  noncePrefix: string;
+  chunkCipherBytes: number[];
+  manifest: string;
+  expiresAt: string;
+  canClaim: boolean;
+  maxReads: ReadChoice;
+}
+export interface EncryptedManifest {
+  version: 2;
+  name: string;
+  type: string;
+  size: number;
+  lastModified: number;
+  chunkSize: number;
+  chunkCount: number;
+}
+export interface LeaseResponse {
+  token: string;
+  leaseExpiresAt: string;
+  expiresAt: string;
+}
+export interface StoredLease {
+  createdAt: number;
+  lastSeenAt: number;
+  expiresAt: number;
+}
+export interface StoredDrop {
+  version: 2;
+  id: string;
+  state: DropState;
+  createdAt: number;
+  uploadExpiresAt: number;
+  expiresInMs: number;
+  expiresAt: number | null;
+  maxReads: ReadChoice;
+  readsClaimed: number;
+  chunkSize: number;
+  chunkCount: number;
+  noncePrefix: string;
+  manifestBytes?: number;
+  chunkCipherBytes?: number[];
+  leases: Record<string, StoredLease>;
+  accessHash: string;
+}