Apply changes

Apply user actions to a layer, each a change whose ops apply in order, all or none, or the undo of an earlier change.

Each change stands on its own and names itself by `opId`: a refused change rolls back alone, and the answer lists every change in order, applied with its result or refused with its error. Asked again under its `opId`, a change gets the same answer, refusals included; a different change under an answered `opId` is refused (IdempotencyKeyReused). `{ opId, undoOf }` undoes an earlier change of the caller, here or in an earlier request; an undo leaves alone what was changed since, and the undo of an undo redoes. A redaction, a flatten, a form repair or a completed signature ends undo for the changes before it (UndoUnavailable). Each op is checked against its own capability: annotation ops need `doc.annotate.modify`, form values `doc.forms.fill`, form structure `doc.forms.modify`, metadata `doc.metadata.modify`. Bytes (a stamp's drawing, an attached file, a signature's artwork) travel as multipart: a JSON `body` part, each op naming its files by role as `resources: { <role>: '<key>' }`, and each file as the part `resource:<key>`. At most 64 changes per request and 512 ops per change.

{
  "changes": [
    {
      "opId": "opId"
    }
  ]
}

import { CloudPDFClient } from "@cloudpdf/sdk";

const client = new CloudPDFClient({
  baseUrl: "https://yourhost.com/path/to/api",
  token: "<token>",
});

await client.doc.changes({
  docId: "docId",
  layerName: "layerName",
  changes: [{
      opId: "opId"
    }]
});