feat(stellar): wraith-names bulk registration / renewal (#118)

[lockoabosede8-byte]

Summary

Adds bulk_register and bulk_renew to the wraith-names Stellar contract, enabling teams to register or renew multiple project names (e.g., app.wraith, docs.wraith, pay.wraith) in a single atomic transaction — cutting per-tx fees and per-op costs.

New public functions

bulk_register(owner, names, meta_addresses) — Register up to 20 names atomically. Validates all inputs upfront (name format, not taken, meta-address length). If any name fails, the entire operation reverts. Emits per-name register events (unchanged v1 topics) + one aggregate bulk_reg event with the owner and list of name hashes.

bulk_renew(names, extend_to_ledger) — Extend TTL for up to 20 names atomically. Validates all names exist before writing any storage. Emits per-name extend events + one aggregate blk_renew event.

Pre-existing bugs fixed

While implementing, several compilation-breaking issues in the existing contract were fixed:

• hash_name() now uses SHA-256 (was returning Ok(()) instead of BytesN<32>)
• Duplicate enum variants removed — lines 85–93 were shadowing lines 67–84 with conflicting discriminant values
• Missing constants added: MIN_LABEL_LEN, MAX_NAME_LEN, MAX_SUBDOMAIN_DEPTH, BULK_LIMIT
• Missing require_manager() added for subdomain ownership checks (parent owner can manage subdomains)
• Subdomain parsing in register_internal() — dot counting, parent hash computation, depth limit enforcement (rejects >1 dot)
• Orphaned subdomain check — resolve() and name_of() now verify parent still exists for subdomains
• Buffer overrun — validate_name() no longer panics on names > 32 bytes

Events

Event	Topics	Data	When
register	("register", name_hash)	(name, stealth_meta_address)	Per name in bulk_register (v1 compat)
bulk_reg	("bulk_reg", owner)	Vec<BytesN<32>> (name hashes)	Once per bulk_register
extend	("extend", name_hash)	extend_to_ledger	Per name in bulk_renew
blk_renew	("blk_renew",)	(name_hashes, extend_to_ledger)	Once per bulk_renew

Files changed

File	Change
stellar/wraith-names/src/lib.rs	Added bulk_register, bulk_renew, fixed bugs
stellar/wraith-names/tests/names_bulk.rs	New — 12 integration tests
stellar/Cargo.lock	ethnum 1.5.2 → 1.5.3 (compat fix)
stellar/wraith-names/test_snapshots/	Updated test snapshots

Test results

64 tests passing (zero warnings):

• 22 lib tests (including 8 new bulk tests)
• 30 audit tests (all existing)
• 12 new integration tests in names_bulk.rs

Test coverage:

• Happy path: both bulk_register and bulk_renew succeed with valid inputs
• Atomicity: taken name, invalid meta length, invalid name char, missing name each cause full revert
• Size cap: 21 names rejected with BulkLimitExceeded
• Mismatched lengths caught
• Invalid extend_to_ledger (past) rejected
• Event emission: correct number of per-name + aggregate events

Closes #118

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[truthixify]

Rebase against develop, conflicts appeared after related PRs landed.