iota-community / javascript-iota-workshop Goto Github PK

Progressive examples that give developers an understanding of how to work with the tangle

JavaScript 100.00%

javascript-iota-workshop's Introduction

IOTA Workshop

Simple examples to help a developer work through interacting with the IOTA network and the iota.js library.

⚠️ Attention ⚠️

The workshops currently uses the iota.js library with the chrysalis branch. This is an experimental library for the testing phase.

You should use the higher level node bindings in the future. The higher level node bindings will be much more abstract and easier to work with.

Getting started

To start playing with these examples run the following commands in your terminal:

git clone https://github.com/iota-community/iota-workshop.git
cd iota-workshop
npm install # or yarn install
node code/1-hello-world.js

You should receive a message including the statistics of an IOTA node. This means you can explore and run the other examples.

Examples included

Here are the examples included:

1-hello-world
2-send-hello
3-fetch-hello
4-create-address
5-check-balance
6-send-tokens
7-mqtt-client

Contribution

PRs are welcome on main

🍻 Lewi

javascript-iota-workshop's People

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javascript-iota-workshop's Issues

Issue with 7.2-mam-public-fetch.js

Got the below error message while running the 7.2-mam-public-fetch.js

thread '' panicked at 'called Option::unwrap() on a None value', libcore/option.rs:335:21
note: Run with RUST_BACKTRACE=1 for a backtrace.
failed to parse: 5273152

I want to contribute but I don't have permissions

error:

Pushing to https://github.com/iota-community/iota-workshop.git
remote: Invalid username or password.
fatal: Authentication failed for 'https://github.com/iota-community/iota-workshop.git/'

1-hello-world.js works only with testnet

Running 1-hello-world on the test net works fine but I get the following error when working on the main net.
{ FetchError: request to https://node.tangle.works:443/ failed, reason: read ECONNRESET
at ClientRequest. (/home/pi/iota/iota-workshop/node_modules/node-fetch/lib/index.js:1393:11)
at ClientRequest.emit (events.js:182:13)
at TLSSocket.socketErrorListener (_http_client.js:382:9)
at TLSSocket.emit (events.js:182:13)
at emitErrorNT (internal/streams/destroy.js:82:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:50:3)
at process._tickCallback (internal/process/next_tick.js:63:19)
message:
'request to https://node.tangle.works:443/ failed, reason: read ECONNRESET',
type: 'system',
errno: 'ECONNRESET',
code: 'ECONNRESET' }

The following show the nodes I have tried.
Am I doing something wrong?
Thanks

///////////////////////////////
// Environment Check
///////////////////////////////

const iotaLibrary = require('@iota/core')

const iota = iotaLibrary.composeAPI({
//provider: 'https://nodes.devnet.thetangle.org:443'
//provider: 'https://node.tangle.works:443'
//provider: 'https://n1.iota.nu:443'
provider: 'https://iota.thathost.net:443'
})

iota
.getNodeInfo()
.then(response => console.log(response))
.catch(err => {
console.error(err)
})

1-hello-world.js connect ECONNREFUSED

When I launch the 1-hello-world.js I get this following error. Should I have to set something before in order to make it work?

FetchError: request to https://api.lb-0.testnet.chrysalis2.com/api/v1/info failed, reason: connect ECONNREFUSED 168.119.63.84:443
at ClientRequest. (/Users/mattia/iota-workshop/node_modules/@iota/iota.js/node_modules/node-fetch/lib/index.js:1461:11)
at ClientRequest.emit (node:events:513:28)
at TLSSocket.socketErrorListener (node:_http_client:481:9)
at TLSSocket.emit (node:events:513:28)
at emitErrorNT (node:internal/streams/destroy:157:8)
at emitErrorCloseNT (node:internal/streams/destroy:122:3)
at processTicksAndRejections (node:internal/process/task_queues:83:21) {
type: 'system',
errno: 'ECONNREFUSED',
code: 'ECONNREFUSED'
}

Error: Invalid trytes length. Expected trytes of even length.. fetching data example 5-2

Hey I just run the program 5.1 to send data and it work correctly then 5.2 to fetch data. But it gave me this error

Error: Invalid trytes length. Expected trytes of even length.
    at Object.exports.trytesToAscii (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/@iota/converter/out/converter/src/ascii.js:76:15)
    at iota.findTransactionObjects.then.response (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/code/5.2-fetch-data.js:27:28)
    at tryCatcher (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/bluebird/js/release/promise.js:517:31)
    at Promise._settlePromise (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/bluebird/js/release/promise.js:574:18)
    at Promise._settlePromise0 (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/bluebird/js/release/promise.js:619:10)
    at Promise._settlePromises (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/bluebird/js/release/promise.js:699:18)
    at _drainQueueStep (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/bluebird/js/release/async.js:138:12)
    at _drainQueue (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/bluebird/js/release/async.js:131:9)
    at Async._drainQueues (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/bluebird/js/release/async.js:147:5)
    at Immediate.Async.drainQueues [as _onImmediate] (/home/yehia/Documents/Projects/IOTA/javascript-iota-workshop/node_modules/bluebird/js/release/async.js:17:14)
    at runCallback (timers.js:705:18)
    at tryOnImmediate (timers.js:676:5)
    at processImmediate (timers.js:658:5)

npm install @iota/iota.js : failing

npm install is failing. Is there anything I'm missing ?

check balance takes an address not a seed?

@l3wi is there a forum we can talk about this repo? twitter? slack?

The 3.2-check-balance.js code takes an address, but I would expect a seed, can you explain? Do we send a receive address or a send address?

By the way, thanks for writing this repo.