# NoteAttachmentMeta

object type

sha256 = the mint-declared digest the presigned PUT itself enforced (byte custody).

## Fields

| Field | Type | Notes |
| --- | --- | --- |
| `id` | [ID](/types/#scalars) `ID!` | The attachment id (the BLOBBOOK SK; minted at upload-mint). |
| `filename` | [String](/types/#scalars) `String!` | No further notes. |
| `declaredContentType` | [String](/types/#scalars) `String!` | The declared MIME — registry-validated against the filename's extension at mint. |
| `bytes` | [Int](/types/#scalars) `Int!` | The blob's byte size (declared at mint; HeadObject-verified at attach-confirm). |
| `sha256` | [String](/types/#scalars) `String!` | No further notes. |
| `key` | [String](/types/#scalars) `String!` | No further notes. |