Part of Stem. This page defines the rpc/type/blob-envelope message type used by the sync RPC specification. Fetch returns them and Publish accepts them.
The formal schema is attached as the schemaDefinition of this page.
A blob on the wire: its CID and its bytes. The receiver recomputes the hash and refuses a mismatch.
Fields
Rules
The receiver recomputes the multihash from data with the hash function named in cid and refuses a mismatch.
Both hash functions in use on the network (BLAKE2b-256 in the daemon, SHA-256 in the SDK) are accepted; the receiver stores by multihash, so one set of bytes is never stored twice.
data is at most 2 MiB.
Today (HM24)
HM24 moves bytes as Bitswap blocks and accepts raw uploads as Daemon.StoreBlobs entries with an optional CID. The envelope is the same pair in schema form.
Example
{"cid": {"/": "bafy2bzacea…"}, "data": {"/": {"bytes": "omR0eXBlZE5vZGVmc2lnbmVy…"}}}See also
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