Replace all fmt.Errorf and errors.New in production code with
coreerr.E("Caller.Method", "message", err) from go-log. Replace
os.MkdirAll with coreio.Local.EnsureDir from go-io. Sentinel errors
(consensus/errors.go, wire/varint.go) intentionally kept as errors.New
for errors.Is compatibility.
270 error call sites converted across 38 files. Test files untouched.
crypto/ directory (CGO) untouched.
Co-Authored-By: Virgil <virgil@lethean.io>
Prevents race where store.Close() runs while syncLoop is still
accessing the database after context cancellation.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Migrate from stdlib flag to cli.Main() + WithCommands() pattern:
- AddChainCommands() registration with persistent --data-dir/--seed/--testnet flags
- Explorer subcommand (TUI block explorer, replaces old default mode)
- Sync subcommand with headless foreground and --daemon/--stop modes
- sync_service.go extracts syncLoop/syncOnce from old main.go
- cmd/core-chain/main.go standalone binary entry point
- Add go-process dependency for daemon lifecycle
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
