First, fund-safe step of "migrate a legacy wallet to a seed wallet": mint a
brand-new BIP39 mnemonic wallet in an ISOLATED throwaway datadir so the user
can later sweep funds into it. No funds move and the real wallet.dat / main
daemon are never touched — the isolated node runs concurrently on its own port.
- EmbeddedDaemon: one-shot isolated-datadir override (setNextStartOverride)
consumed on the next start(); a skip-default-port-check for an isolated
instance beside the main daemon; and a tcpPortInUse() probe. The datadir's
basename must be the assetchain name (DRAGONX) and the daemon reads
<datadir>/DRAGONX.conf itself, so no -conf is passed (both learned from
live testing against the hd-transparent-keys daemon).
- SeedWalletCreator (src/daemon): picks a free port, writes a throwaway conf,
starts an isolated dragonxd with -usemnemonic=1 -connect=0, waits for RPC,
calls z_exportmnemonic + z_getnewaddress (the sweep target), stops it, and
keeps/scrubs the temp datadir. Off-thread; the seed is wiped after use.
- App: beginCreateSeedWallet (background) -> pumpSeedMigration (main-thread
handoff) -> renderSeedMigrationDialog (Intro -> Working -> Show seed ->
Error), reusing the seed_display grid + clipboard auto-clear.
- Settings: "Migrate to seed…" button (full-node gated) + persisted pending
migration state (dest address + temp datadir) for Phase 2 to adopt.
Validated end-to-end against the hd-transparent-keys daemon: the isolated
node comes up in ~4s and returns a 24-word mnemonic + a shielded z-address.
Requires that daemon (the bundled Jun-28 build lacks z_exportmnemonic). The
migration modal uses English literals for now (as renderBackupDialog does);
the whole flow gets translated once Phase 2 finalizes it. Phase 2 (sweep +
adopt) is next.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
