// ─── Key material ────────────────────────────────────────────────────────────

export interface KeyFile {
  pub_key:      string;  // hex Ed25519 public key  (32 bytes)
  priv_key:     string;  // hex Ed25519 private key (64 bytes)
  x25519_pub:   string;  // hex X25519 public key   (32 bytes)
  x25519_priv:  string;  // hex X25519 private key  (32 bytes)
}

// ─── Contact ─────────────────────────────────────────────────────────────────

export interface Contact {
  address:    string;  // Ed25519 pubkey hex — blockchain address
  x25519Pub:  string;  // X25519 pubkey hex  — encryption key
  username?:  string;  // @name from registry contract
  alias?:     string;  // local nickname
  addedAt:    number;  // unix ms
}

// ─── Messages ─────────────────────────────────────────────────────────────────

export interface Envelope {
  sender_pub:    string;  // X25519 hex
  recipient_pub: string;  // X25519 hex
  nonce:         string;  // hex 24 bytes
  ciphertext:    string;  // hex NaCl box
  timestamp:     number;  // unix seconds
}

export interface Message {
  id:        string;
  from:      string;   // X25519 pubkey of sender
  text:      string;
  timestamp: number;
  mine:      boolean;
}

// ─── Chat ────────────────────────────────────────────────────────────────────

export interface Chat {
  contactAddress: string;  // Ed25519 pubkey hex
  contactX25519:  string;  // X25519 pubkey hex
  username?:      string;
  alias?:         string;
  lastMessage?:   string;
  lastTime?:      number;
  unread:         number;
}

// ─── Contact request ─────────────────────────────────────────────────────────

export interface ContactRequest {
  from:       string;   // Ed25519 pubkey hex
  x25519Pub:  string;   // X25519 pubkey hex; empty until fetched from identity
  username?:  string;
  intro:      string;   // plaintext intro (stored on-chain)
  timestamp:  number;
  txHash:     string;
}

// ─── Transaction ─────────────────────────────────────────────────────────────

export interface TxRecord {
  hash:      string;
  type:      string;
  from:      string;
  to?:       string;
  amount?:   number;
  fee:       number;
  timestamp: number;
  status:    'confirmed' | 'pending';
}

// ─── Node info ───────────────────────────────────────────────────────────────

export interface NetStats {
  total_blocks:   number;
  total_txs:      number;
  peer_count:     number;
  chain_id:       string;
}

export interface NodeSettings {
  nodeUrl:    string;
  contractId: string;  // username_registry contract
}