theseus/bundled-addons/aegis/lib/dgb/deps.js

// Dependency injection for the vendored DGB modules.
//
// These files were vendored from @dgb-wallet/core and imported
// "bitcoinjs-lib", "bip32", "ecpair" and "@bitcoinerlab/secp256k1" as bare
// specifiers. That resolves fine in a dev checkout, where Theseus's
// node_modules sits above the add-on — and fails for every OTA install, where
// Aegis lives in <userData>/extensions/aegis/ and Node's ESM resolver has
// nowhere to find them. index.js caught the failure and set dgbCore = null,
// so DigiByte quietly stopped existing and an import died with "DGB adapter
// not available". It worked on a fresh install and broke after the first
// update, which is the worst possible shape for a bug.
//
// index.js already holds all of these via api.require (which resolves against
// the app tree), so it injects them here before importing anything under
// lib/dgb/. Every consumer reads them through the accessors below rather than
// capturing them at module scope, so nothing depends on import order and a
// missing injection fails loudly at the call instead of silently at load.

let deps = null;

export function setDgbDeps(d) {
  const need = ["bitcoinjs", "ecc", "bip32Factory", "ecpairFactory", "bip39", "hmac", "sha512"];
  for (const k of need) {
    if (!d || !d[k]) throw new Error(`setDgbDeps: missing ${k}`);
  }
  deps = d;
}

function need() {
  if (!deps) throw new Error("DGB modules used before setDgbDeps() — see lib/dgb/deps.js");
  return deps;
}

export const bitcoinjs = () => need().bitcoinjs;
export const payments = () => need().bitcoinjs.payments;
export const Psbt = () => need().bitcoinjs.Psbt;
export const ecc = () => need().ecc;
export const bip39 = () => need().bip39;
export const hmac = () => need().hmac;
export const sha512 = () => need().sha512;

// initEccLib must run before any Taproot derivation, and exactly once.
let eccInstalled = false;
export function ensureEcc() {
  if (eccInstalled) return;
  need().bitcoinjs.initEccLib(need().ecc);
  eccInstalled = true;
}

// Built on first use rather than at module scope, so hd.js no longer forces
// the deps to exist merely by being imported.
let bip32Cached = null;
export function bip32() {
  if (!bip32Cached) bip32Cached = need().bip32Factory(need().ecc);
  return bip32Cached;
}

let ecpairCached = null;
export function ECPair() {
  if (!ecpairCached) ecpairCached = need().ecpairFactory(need().ecc);
  return ecpairCached;
}