Be able to download a specific file of an asset.

integration/ocean/ConsumeAsset.test.ts

@@ -1,5 +1,4 @@
 import { assert } from "chai"
-import * as Web3 from "web3"
 import * as fs from "fs"
 
 import { config } from "../config"
@@ -94,7 +93,7 @@ describe("Consume Asset", () => {
     it("should consume and store the assets", async () => {
         const accessService = ddo.findServiceByType("Access")
 
-        const folder = "/tmp/ocean/squid-js"
+        const folder = "/tmp/ocean/squid-js-1"
         const path = await ocean.assets.consume(
             serviceAgreementSignatureResult.agreementId,
             ddo.id,
@@ -114,4 +113,29 @@ describe("Consume Asset", () => {
         assert.deepEqual(files, ["file-0", "file-1"], "Stored files are not correct.")
         // assert.deepEqual(files, ["README.md", "package.json"], "Stored files are not correct.")
     })
+
+    it("should consume and store one assets", async () => {
+        const accessService = ddo.findServiceByType("Access")
+
+        const folder = "/tmp/ocean/squid-js-2"
+        const path = await ocean.assets.consume(
+            serviceAgreementSignatureResult.agreementId,
+            ddo.id,
+            accessService.serviceDefinitionId,
+            consumer,
+            folder,
+            1,
+        )
+
+        assert.include(path, folder, "The storage path is not correct.")
+
+        const files = await new Promise<string[]>((resolve) => {
+            fs.readdir(path, (err, fileList) => {
+                resolve(fileList)
+            })
+        })
+
+        assert.deepEqual(files, ["file-1"], "Stored files are not correct.")
+        // assert.deepEqual(files, ["package.json"], "Stored files are not correct.")
+    })
 })

scripts/unlock-accounts.sh

@@ -1,3 +1,5 @@
+#!/bin/sh
+
 count=0
 echo "Starting..."
 while sleep 0.1;

src/brizo/Brizo.ts

@@ -72,12 +72,14 @@ export class Brizo  extends Instantiable {
         account: Account,
         files: File[],
         destination: string,
+        index: number = -1,
     ): Promise<string> {
         const agreementIdSignature = await this.ocean.utils.signature.signText(agreementId, account.getId())
         const filesPromises = files
-            .map(async ({}, i) => {
+            .filter(({}, i) => index === -1 || i === index)
+            .map(async ({index}) => {
                 let consumeUrl = serviceEndpoint
-                consumeUrl += `?index=${i}`
+                consumeUrl += `?index=${index}`
                 consumeUrl += `&serviceAgreementId=${agreementId}`
                 consumeUrl += `&consumerAddress=${account.getId()}`
                 consumeUrl += `&signature=${agreementIdSignature}`
@@ -85,7 +87,7 @@ export class Brizo  extends Instantiable {
                 try {
                     await this.downloadFile(
                         consumeUrl,
-                        `file-${i}`,
+                        `file-${index}`,
                         destination,
                     )
                 } catch (e) {

src/ocean/OceanAssets.ts

@@ -147,14 +147,16 @@ export class OceanAssets extends Instantiable {
     }
 
     // tslint:disable-next-line
-    public async consume(agreementId: string, did: string, serviceDefinitionId: string, consumerAccount: Account, resultPath: string): Promise<string>
+    public async consume(agreementId: string, did: string, serviceDefinitionId: string, consumerAccount: Account, resultPath: string, index?: number): Promise<string>
-    public async consume(agreementId: string, did: string, serviceDefinitionId: string, consumerAccount: Account): Promise<true>
+    // tslint:disable-next-line
+    public async consume(agreementId: string, did: string, serviceDefinitionId: string, consumerAccount: Account, resultPath?: undefined | null, index?: number): Promise<true>
     public async consume(
         agreementId: string,
         did: string,
         serviceDefinitionId: string,
         consumerAccount: Account,
         resultPath?: string,
+        index: number = -1,
     ): Promise<string | true> {
 
         const ddo = await this.resolve(did)
@@ -179,6 +181,7 @@ export class OceanAssets extends Instantiable {
             consumerAccount,
             files,
             resultPath,
+            index,
         )
         this.logger.log("Files consumed")