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Holochain-in-Action 8 - Conductor & Sandbox Demo - Basic UI implemented and connected to hApp

In this video we will walk you through:
00:00:00 Intro
00:03:51 What is conductor?
00:13:00 Play with Holochain CLI and Sandbox
00:28:32 Create DNA and hApp bundle
00:36:27 Install and run hApp in Conductor using Sandbox
00:45:17 creating a basic UI project step by step.
01:03:38 connect UI to hApp and call zome function


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2 Likes

Hi @hedayat i have tried to start the peershare happ. Should the current version in (GitHub - holochain-in-action/peer-share) work?

The sandbox gives me the following error when i press the button in the web UI.

[nix-shell:~/peer-share/holo-layer]$ hc s run -p=8900

Conductor ready.
hc-sandbox: Running conductor on admin port 40627
hc-sandbox: Attaching app port 8900
hc-sandbox: App port attached at 8900
hc-sandbox: Connected successfully to a running holochain
Jun 25 11:05:18.583 ERROR wasm_trace: peershare::__who_am_i_extern:zomes/peershare/src/lib.rs:13 output_type = "core::result::Result<holo_hash::hash::HoloHash<holo_hash::hash_type::primitive::Agent>, holochain_wasmer_common::result::WasmError>"; bytes = [161, 32]; Deserialize("invalid type: string \" \", expected unit")

The webapp seems to run fine and i can open it in the browser:

[nix-shell:~/peer-share/client-basic]$ npm start

> [email protected] start /home/student/peer-share/client-basic
> concurrently --kill-others "npm run build" "npm run serve" 

[0] 
[0] > [email protected] build /home/student/peer-share/client-basic
[0] > webpack --watch
[0] 
[1] 
[1] > [email protected] serve /home/student/peer-share/client-basic
[1] > webpack serve
[1] 
[0] asset index.js 178 KiB [compared for emit] (name: main)
[0] runtime modules 1.13 KiB 5 modules
[0] modules by path ./node_modules/ 149 KiB
[0]   modules by path ./node_modules/@msgpack/msgpack/dist.es5+esm/ 70.8 KiB
[0]     modules by path ./node_modules/@msgpack/msgpack/dist.es5+esm/*.mjs 58.8 KiB 10 modules
[0]     modules by path ./node_modules/@msgpack/msgpack/dist.es5+esm/utils/*.mjs 11.9 KiB 5 modules
[0]   modules by path ./node_modules/@holochain/conductor-api/lib/ 15 KiB
[0]     modules by path ./node_modules/@holochain/conductor-api/lib/api/*.js 1.99 KiB 4 modules
[0]     modules by path ./node_modules/@holochain/conductor-api/lib/websocket/*.js 12.2 KiB 4 modules
[0]     ./node_modules/@holochain/conductor-api/lib/index.js 842 bytes [built] [code generated]
[0]   ./node_modules/buffer/index.js 57 KiB [built] [code generated]
[0]   ./node_modules/base64-js/index.js 3.84 KiB [built] [code generated]
[0]   ./node_modules/ieee754/index.js 2.1 KiB [built] [code generated]
[0]   ./node_modules/isomorphic-ws/browser.js 542 bytes [built] [code generated]
[0] ./src/index.js 1.35 KiB [built] [code generated]
[0] webpack 5.38.1 compiled successfully in 508 ms
[1] ℹ 「wds」: Project is running at http://localhost:8080/
[1] ℹ 「wds」: webpack output is served from /dist/
[1] ℹ 「wds」: Content not from webpack is served from ./dist
[1] ℹ 「wdm」: asset index.js 526 KiB [emitted] (name: main)
[1] runtime modules 1.25 KiB 6 modules
[1] cacheable modules 486 KiB
[1]   modules by path ./node_modules/@msgpack/msgpack/dist.es5+esm/ 70.8 KiB
[1]     modules by path ./node_modules/@msgpack/msgpack/dist.es5+esm/*.mjs 58.8 KiB 10 modules
[1]     modules by path ./node_modules/@msgpack/msgpack/dist.es5+esm/utils/*.mjs 11.9 KiB 5 modules
[1]   modules by path ./node_modules/webpack-dev-server/client/ 20.9 KiB 10 modules
[1]   modules by path ./node_modules/@holochain/conductor-api/lib/ 15 KiB 9 modules
[1]   modules by path ./node_modules/html-entities/lib/*.js 61 KiB 5 modules
[1]   modules by path ./node_modules/url/ 37.4 KiB 3 modules
[1]   modules by path ./node_modules/querystring/*.js 4.51 KiB 3 modules
[1]   modules by path ./node_modules/webpack/hot/ 1.42 KiB
[1]     ./node_modules/webpack/hot/emitter.js 75 bytes [built] [code generated]
[1]     ./node_modules/webpack/hot/log.js 1.34 KiB [built] [code generated]
[1] ./node_modules/webpack/hot/ sync nonrecursive ^\.\/log$ 170 bytes [built] [code generated]
[1] webpack 5.38.1 compiled successfully in 798 ms
[1] ℹ 「wdm」: Compiled successfully.

Any clues that can direct me into the right direction?

1 Like

Hi @wwo

I fixed the bug and pushed the changes to UI. Fetch project and re-run again.

The issue was about Payload. There was extra space in Payload TextBox so always there was an empty string sending to zome function while functions didn’t wait for any input parameter.

Thanks for testing and sharing.

1 Like

Thank you for your answer. I just tried it now it works. :smiley: :+1:

1 Like