Make every primary-network chain (X/C/D/Q/A/B/T/Z/G/K) opt-in via its
own <x>chain.json shard. Absent shard -> empty ConfigOutput field ->
builder skips the CreateChainTx -> daemon doesn't start that chain.
Lux mainnet/testnet/devnet ship full chain set as shards; localnet and
local ship the same canonical X asset shard. P-only sovereign L1 boot
shape (<tenant> etc.) is achieved by shipping pchain.json+network.json
only — no env knob, no special builder branch.
X-Chain genesis was previously hardcoded inside FromConfig as a literal
{Symbol:"LUX",Name:"Lux",Denomination:9}. Now sourced from xchain.json
shard, which keeps the same canonical asset for Lux but lets a sibling
network (lqd / <tenant>) ship its own descriptor or ship none and
boot a P-only primary network.
builder.FromConfig:
- HRP hoisted above the X-Chain conditional (used on both branches).
- X-Chain construction gated on config.XChainGenesis != "".
- Returns ids.Empty for xAssetID when X is absent.
- Single chainEntries table replaces the per-chain switch and the
DefaultChainGenesis stub-data fallback.
- "platform" alias renamed to "protocol" (PChainAliases / VMAliases /
Aliases output) — value is "P-Chain", served by ProtocolVM.
configs.loadAllChainShards / readAllChainShards:
- Single dispatch over primaryChainShardFiles in canonical order
(X,C,D,Q,A,B,T,Z,G,K). Adding a new primary chain is one entry +
one slot, not a new env knob and not a new builder branch.
pkg/genesis/types.go:
- ConfigOutput.XChainGenesis (omitempty) added; threaded through
Config <-> ConfigOutput conversions.
Tests:
- builder/builder_test.go: TestFromConfig_ChainSetIsShardDriven pins
the contract — full mainnet emits 10 chains + non-empty xAssetID;
same config with all chain shards stripped emits 0 chains + empty
xAssetID, validators + UTXOs intact.
- configs/chain_shards_test.go: TestGetGenesis_XChainShardPresent...
asserts every Lux network embeds the canonical {LUX,Lux,9} asset;
AbsentShardEmptyOptIn extended to cover xChainGenesis.
Hanzo AI