# NATS — verae-tree-node

| Direction | Address | From / to | Body |
|-----------|---------|-----------|------|
| IN | `verae.archive.put` | merkle builder | `{ sha256, kind: "tree", record: { merkleRoot, proof, leafIndex, chainSealJobId } }` |
| IN | `verae.archive.query` | aggregator (broadcast) | `{ correlationId, sha256, kinds: ["tree", …] }` |
| OUT | `verae.archive.reply.<correlationId>` | aggregator | only if bloom.mightHave(sha256) |