- sync/statesync (test_trie + trie_segments): codec/wrappers ->
luxfi/utils/wrappers (canonical Packer + ByteLen/ShortLen/LongLen).
- utils/rpc/handler.go: codec/jsonrpc -> luxfi/utils/json (NewCodec).
- plugin/evm/atomic/vm/api.go + plugin/evm/client/client.go:
codec/jsonrpc -> luxfi/utils/json for Uint32/Uint64 quoted JSON.
All three subpackages have identical API in luxfi/utils v1.1.5; coreth
no longer imports codec/wrappers or codec/jsonrpc — coreth still
imports codec/linearcodec from plugin/evm/secpfx, which is the SECP fx
that needs the legacy codec.Registry binding to plug into the C-chain
fx system. Documented as structural retain.