feat: add store.get and upload.get to clients

packages/upload-client/src/store.js

@@ -135,6 +135,63 @@ export async function add(
   return link
 }
 
+/**
+ * Get details of a stored item.
+ *
+ * Required delegated capability proofs: `store/get`
+ *
+ * @param {import('./types.js').InvocationConfig} conf Configuration
+ * for the UCAN invocation. An object with `issuer`, `with` and `proofs`.
+ *
+ * The `issuer` is the signing authority that is issuing the UCAN
+ * invocation(s). It is typically the user _agent_.
+ *
+ * The `with` is the resource the invocation applies to. It is typically the
+ * DID of a space.
+ *
+ * The `proofs` are a set of capability delegations that prove the issuer
+ * has the capability to perform the action.
+ *
+ * The issuer needs the `store/get` delegated capability.
+ * @param {import('multiformats/link').UnknownLink} link CID of stored CAR file.
+ * @param {import('./types.js').RequestOptions} [options]
+ * @returns {Promise<import('./types.js').StoreGetSuccess>}
+ */
+export async function get(
+  { issuer, with: resource, proofs, audience },
+  link,
+  options = {}
+) {
+  /* c8 ignore next */
+  const conn = options.connection ?? connection
+  const result = await retry(
+    async () => {
+      return await StoreCapabilities.get
+        .invoke({
+          issuer,
+          /* c8 ignore next */
+          audience: audience ?? servicePrincipal,
+          with: SpaceDID.from(resource),
+          nb: { link },
+          proofs,
+        })
+        .execute(conn)
+    },
+    {
+      onFailedAttempt: console.warn,
+      retries: options.retries ?? REQUEST_RETRIES,
+    }
+  )
+
+  if (!result.out.ok) {
+    throw new Error(`failed ${StoreCapabilities.get.can} invocation`, {
+      cause: result.out.error,
+    })
+  }
+
+  return result.out.ok
+}
+
 /**
  * List CAR files stored by the issuer.
  *

packages/upload-client/src/types.ts

@@ -51,6 +51,8 @@ export type {
   StoreAddSuccess,
   StoreAddSuccessUpload,
   StoreAddSuccessDone,
+  StoreGetSuccess,
+  StoreGetFailure,
   StoreList,
   StoreListSuccess,
   StoreListItem,
@@ -59,6 +61,8 @@ export type {
   StoreRemoveFailure,
   UploadAdd,
   UploadAddSuccess,
+  UploadGetSuccess,
+  UploadGetFailure,
   UploadList,
   UploadListSuccess,
   UploadListItem,

packages/upload-client/src/upload.js

@@ -64,6 +64,63 @@ export async function add(
   return result.out.ok
 }
 
+/**
+ * Get details of an "upload".
+ *
+ * Required delegated capability proofs: `upload/get`
+ *
+ * @param {import('./types.js').InvocationConfig} conf Configuration
+ * for the UCAN invocation. An object with `issuer`, `with` and `proofs`.
+ *
+ * The `issuer` is the signing authority that is issuing the UCAN
+ * invocation(s). It is typically the user _agent_.
+ *
+ * The `with` is the resource the invocation applies to. It is typically the
+ * DID of a space.
+ *
+ * The `proofs` are a set of capability delegations that prove the issuer
+ * has the capability to perform the action.
+ *
+ * The issuer needs the `upload/get` delegated capability.
+ * @param {import('multiformats/link').UnknownLink} root Root data CID for the DAG that was stored.
+ * @param {import('./types.js').RequestOptions} [options]
+ * @returns {Promise<import('./types.js').UploadGetSuccess>}
+ */
+export async function get(
+  { issuer, with: resource, proofs, audience },
+  root,
+  options = {}
+) {
+  /* c8 ignore next */
+  const conn = options.connection ?? connection
+  const result = await retry(
+    async () => {
+      return await UploadCapabilities.get
+        .invoke({
+          issuer,
+          /* c8 ignore next */
+          audience: audience ?? servicePrincipal,
+          with: SpaceDID.from(resource),
+          nb: { root },
+          proofs,
+        })
+        .execute(conn)
+    },
+    {
+      onFailedAttempt: console.warn,
+      retries: options.retries ?? REQUEST_RETRIES,
+    }
+  )
+
+  if (!result.out.ok) {
+    throw new Error(`failed ${UploadCapabilities.get.can} invocation`, {
+      cause: result.out.error,
+    })
+  }
+
+  return result.out.ok
+}
+
 /**
  * List uploads created by the issuer.
  *

packages/upload-client/test/store.test.js

@@ -648,3 +648,107 @@ describe('Store.remove', () => {
     )
   })
 })
+
+describe('Store.get', () => {
+  it('gets stored item', async () => {
+    const space = await Signer.generate()
+    const agent = await Signer.generate()
+    const car = await randomCAR(128)
+
+    const proofs = [
+      await StoreCapabilities.get.delegate({
+        issuer: space,
+        audience: agent,
+        with: space.did(),
+        expiration: Infinity,
+      }),
+    ]
+
+    const service = mockService({
+      store: {
+        get: provide(StoreCapabilities.get, ({ invocation, capability }) => {
+          assert.equal(invocation.issuer.did(), agent.did())
+          assert.equal(invocation.capabilities.length, 1)
+          assert.equal(capability.can, StoreCapabilities.get.can)
+          assert.equal(capability.with, space.did())
+          assert.equal(String(capability.nb?.link), car.cid.toString())
+          return {
+            ok: {
+              link: car.cid,
+              size: car.size,
+              insertedAt: new Date().toISOString(),
+            },
+          }
+        }),
+      },
+    })
+
+    const server = Server.create({
+      id: serviceSigner,
+      service,
+      codec: CAR.inbound,
+      validateAuthorization,
+    })
+    const connection = Client.connect({
+      id: serviceSigner,
+      codec: CAR.outbound,
+      channel: server,
+    })
+
+    const result = await Store.get(
+      { issuer: agent, with: space.did(), proofs, audience: serviceSigner },
+      car.cid,
+      { connection }
+    )
+
+    assert(service.store.get.called)
+    assert.equal(service.store.get.callCount, 1)
+
+    assert.equal(result.link.toString(), car.cid.toString())
+    assert.equal(result.size, car.size)
+  })
+
+  it('throws on service error', async () => {
+    const space = await Signer.generate()
+    const agent = await Signer.generate()
+    const car = await randomCAR(128)
+
+    const proofs = [
+      await StoreCapabilities.get.delegate({
+        issuer: space,
+        audience: agent,
+        with: space.did(),
+        expiration: Infinity,
+      }),
+    ]
+
+    const service = mockService({
+      store: {
+        get: provide(StoreCapabilities.get, () => {
+          throw new Server.Failure('boom')
+        }),
+      },
+    })
+
+    const server = Server.create({
+      id: serviceSigner,
+      service,
+      codec: CAR.inbound,
+      validateAuthorization,
+    })
+    const connection = Client.connect({
+      id: serviceSigner,
+      codec: CAR.outbound,
+      channel: server,
+    })
+
+    await assert.rejects(
+      Store.get(
+        { issuer: agent, with: space.did(), proofs, audience: serviceSigner },
+        car.cid,
+        { connection }
+      ),
+      { message: 'failed store/get invocation' }
+    )
+  })
+})

packages/upload-client/test/upload.test.js

@@ -443,3 +443,108 @@ describe('Upload.remove', () => {
     )
   })
 })
+
+describe('Upload.get', () => {
+  it('gets an upload', async () => {
+    const space = await Signer.generate()
+    const agent = await Signer.generate()
+    const car = await randomCAR(128)
+
+    const proofs = [
+      await UploadCapabilities.get.delegate({
+        issuer: space,
+        audience: agent,
+        with: space.did(),
+        expiration: Infinity,
+      }),
+    ]
+
+    const service = mockService({
+      upload: {
+        get: provide(UploadCapabilities.get, ({ invocation, capability }) => {
+          assert.equal(invocation.issuer.did(), agent.did())
+          assert.equal(invocation.capabilities.length, 1)
+          assert.equal(capability.can, UploadCapabilities.get.can)
+          assert.equal(capability.with, space.did())
+          assert.equal(String(capability.nb?.root), car.roots[0].toString())
+          return {
+            ok: {
+              root: car.roots[0],
+              shards: [car.cid],
+              insertedAt: new Date().toISOString(),
+              updatedAt: new Date().toISOString(),
+            },
+          }
+        }),
+      },
+    })
+
+    const server = Server.create({
+      id: serviceSigner,
+      service,
+      codec: CAR.inbound,
+      validateAuthorization,
+    })
+    const connection = Client.connect({
+      id: serviceSigner,
+      codec: CAR.outbound,
+      channel: server,
+    })
+
+    const result = await Upload.get(
+      { issuer: agent, with: space.did(), proofs, audience: serviceSigner },
+      car.roots[0],
+      { connection }
+    )
+
+    assert(service.upload.get.called)
+    assert.equal(service.upload.get.callCount, 1)
+
+    assert.equal(result.root.toString(), car.roots[0].toString())
+    assert.equal(result.shards?.[0].toString(), car.cid)
+  })
+
+  it('throws on service error', async () => {
+    const space = await Signer.generate()
+    const agent = await Signer.generate()
+    const car = await randomCAR(128)
+
+    const proofs = [
+      await UploadCapabilities.get.delegate({
+        issuer: space,
+        audience: agent,
+        with: space.did(),
+        expiration: Infinity,
+      }),
+    ]
+
+    const service = mockService({
+      upload: {
+        get: provide(UploadCapabilities.get, () => {
+          throw new Server.Failure('boom')
+        }),
+      },
+    })
+
+    const server = Server.create({
+      id: serviceSigner,
+      service,
+      codec: CAR.inbound,
+      validateAuthorization,
+    })
+    const connection = Client.connect({
+      id: serviceSigner,
+      codec: CAR.outbound,
+      channel: server,
+    })
+
+    await assert.rejects(
+      Upload.get(
+        { issuer: agent, with: space.did(), proofs, audience: serviceSigner },
+        car.roots[0],
+        { connection }
+      ),
+      { message: 'failed upload/get invocation' }
+    )
+  })
+})

packages/w3up-client/src/capability/store.js

@@ -18,6 +18,18 @@ export class StoreClient extends Base {
     return Store.add(conf, car, options)
   }
 
+  /**
+   * Get details of a stored item.
+   *
+   * @param {import('../types.js').UnknownLink} link - Root data CID for the DAG that was stored.
+   * @param {import('../types.js').RequestOptions} [options]
+   */
+  async get(link, options = {}) {
+    const conf = await this._invocationConfig([StoreCapabilities.get.can])
+    options.connection = this._serviceConf.upload
+    return Store.get(conf, link, options)
+  }
+
   /**
    * List CAR files stored to the resource.
    *