verae-tree-node/NATS.md

NATS — verae-tree-node

Tree nodes are WORM archives that store Merkle leaf proofs. They listen on the same archive subjects so a leaf that was never itemized on the main chain can still be found.

Zapier never connects here. Middleware aggregator broadcasts; a tree node that does not hold the leaf stays silent.

Direction	Address	From / to	Body
IN	verae.archive.put	batch splitter / merkle builder	{ sha256, tenantId, kind: "tree", record: { merkleRoot, proof, leafIndex, chainSealJobId }, traceId }
IN	verae.archive.query	aggregator (broadcast, no queue group)	{ correlationId, sha256, tenantId, kinds: ["tree", …], traceId }
OUT	verae.archive.reply.<correlationId>	aggregator	{ archiveId, sha256, records[], traceId } only if bloom.mightHave(sha256)

record.merkleRoot is the hash sealed on the main Verae chain. proof lets a verifier recompute the root from this leaf.