Function fetchCanisterModuleHash

apps/wallet/src/utils/helper.utils.ts:434–466

(
  agent: HttpAgent,
  canisterId: Principal,
)

};

export async function fetchCanisterModuleHash(
  agent: HttpAgent,
  canisterId: Principal,
): Promise<string | null> {
  const encoder = new TextEncoder();
  const moduleHashPath: ArrayBuffer[] = [
    encoder.encode('canister'),
    canisterId.toUint8Array(),
    encoder.encode('module_hash'),
  ];

  const state = await agent.readState(canisterId, {
    paths: [moduleHashPath],
  });

  const certificate = await Certificate.create({
    canisterId,
    certificate: state.certificate,
    rootKey: agent.rootKey!,
  });

  const moduleHash = certificate.lookup(moduleHashPath);

  if (moduleHash.status !== LookupStatus.Found) {
    return null;
  }

  if (!(moduleHash.value instanceof ArrayBuffer)) {
    throw new Error('Module hash value is not an ArrayBuffer');
  }

  return arrayBufferToHex(moduleHash.value);
}

export async function fetchCanisterControllers(
  agent: HttpAgent,