All 5 concrete tx types (ImportTx/ExportTx/RelayOrderTx/PlaceOrderTx/
CancelOrderTx) + nested AtomicInput/AtomicOutput now encode as
[typeByte][ZAP object] at fixed offsets instead of [typeByte][json body].
Repeated fields use the bridgevm blob-list idiom (u32 lens-list + concat blob
via SetList/SetBytes) — chains-module zap v1.2.0 has AddObjectPtr but not the
List.ObjectPtr reader. Deterministic by construction; TxID = Checksum256(wire);
canonical trailing-byte reject. Bench (ImportTx 2in/2out): marshal 18255→912ns
(~20x), parse 14923→498ns (~30x), far fewer allocs. Round-trip + determinism +
signature-through-wire tests green; dexvm redteam/conservation/custody suites
green (parse txs through this codec e2e).
Co-authored-by: Hanzo Dev <[email protected]>
zeekayandHanzo Dev
3769a8ab27