msteem - Multisignature transaction app by jga

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· @jga ·
$113.35
msteem - Multisignature transaction app
#### Repository
https://github.com/joticajulian/msteem

#### Webpage
https://joticajulian.github.io/msteem/

### msteem
msteem is a webpage to modify the authorities of an account (owner, active, and posting keys) in order to support multisignatures. It also includes a page to sign any type of operation using multisignatures and broadcast it to the blockchain. This app has been developed to participate in the [Steem developer bounty - 1500 STEEM - Multisignature Transaction Guide](https://steemit.com/steem/@timcliff/steem-developer-bounty-1500-steem-multisignature-transaction-guide-details-inside).

### Part 1. Setting up multisignature authority
#### Step 1 - Load account
Open [msteem](https://joticajulian.github.io/msteem/) and enter the account you want to modify. It will display the actual authorities (owner, active, posting) including weights and threshold.

<center>![1.png](https://cdn.steemitimages.com/DQmasnSawPvZNux6WUQnrWYw4uwoxPPxnDUq9UffBdjuoki/1.png)</center>

#### Step 2 - Generate Keys if needed
If you want to generate new keys use the link at the top called [Generate Keys](https://joticajulian.github.io/msteem/#/genkey). Over there put the account and the password of your preference.

<center>![2.png](https://cdn.steemitimages.com/DQmcUH8REixNHoTteYafirqE42zCRjxrdKpJ99yf26TfZWb/2.png)</center>

#### Step 3 - Modify authorities
The website is very intuitive. You can:
- Remove keys or accounts by clicking in the “X”
- Add new keys or accounts specifying the public key and weight
- Modify the threshold

**Threshold**: Every key or account has a weight associated. The threshold represents the total weight necessary for a transaction to be valid. For instance, 5 keys with a weight of 1 each one in the posting role, and a threshold of 3 means that a transaction needs at least 3 signatures to be valid.

Following the request of the [task](https://steemit.com/steem/@timcliff/steem-developer-bounty-1500-steem-multisignature-transaction-guide-details-inside):
> include an example that walks through the steps for this scenario: A user wants to have their active authority setup with seven keys. Keys one and two each have a weight of 25%. Keys three, four, five, six, and seven each have a weight of 10%. In order for a transaction to be valid, it must have at least 40% weighted signatures.

Generate different private and public keys as mentioned before. Save the private keys in a safe place, and only insert the public keys.

| key/account | weight |
--- | ---
`STM6qcCgixB2VHbr6Pq2tDPSUY7u5sPvYbQsRQnn7PDd6SQkSsTq9` | 25
`STM7B4ZB6g6aT9fWcFb6YgssjZcusH97rPcSzmFEru2b8Le36SkvD` | 25
`STM8dDCS2bAEpUPRxS7kGrfPE8kQ7FW4ZZLyJjhmbX6Jvieof3JfZ` | 10
jga | 10
timcliff | 10
utopian-io | 10
ydavgonzalez | 10
| **Threshold** | **40** |

In this example, I have included 3 keys and 4 accounts. The first two have a weight of 25, and the rest each have a weight of 10. The threshold is 40. This means that a transaction could be valid with the signature of the first two keys, or be valid with the signature of 4 keys with weight 10.

<center>![3.png](https://cdn.steemitimages.com/DQmZ75UreB31Gvghfhaf8PmLNEr6ch9qnCpee9c6iopDUfj/3.png)</center>

#### Step 3 - Generate operation
Go to the bottom and click on “Generate Operation”. It will create an operation for `account_update` and includes the role (or roles) modified. It also includes the actual `json_metadata` and `memo_key` of the account (needed values in the operation).

```
[
  "account_update",
  {
    "account": "fulanitodetal",
    "memo_key": "STM8Ls8rZTJGh2L9mkfrcH9cpXpz1uyoAwuNj5kUg6WGUXvBxQTeB",
    "json_metadata": "{}",
    "active": {
      "key_auths": [
        [
          "STM6qcCgixB2VHbr6Pq2tDPSUY7u5sPvYbQsRQnn7PDd6SQkSsTq9",
          25
        ],
        [
          "STM7B4ZB6g6aT9fWcFb6YgssjZcusH97rPcSzmFEru2b8Le36SkvD",
          25
        ],
        [
          "STM8dDCS2bAEpUPRxS7kGrfPE8kQ7FW4ZZLyJjhmbX6Jvieof3JfZ",
          10
        ]
      ],
      "account_auths": [
        [
          "jga",
          10
        ],
        [
          "timcliff",
          10
        ],
        [
          "utopian-io",
          10
        ],
        [
          "ydavgonzalez",
          10
        ]
      ],
      "weight_threshold": 40
    }
  }
]
```

Click on “Copy” or just select and copy the operation.

#### Step 4 - Sign and broadcast transaction
- Click on "[Sign Transaction](https://joticajulian.github.io/msteem/#/sign)" to open the page for signing operations
- Paste the operation in the text area
- Click on “Add headers” to include the operation in a transaction
- Insert your private key and click sign. (your private key is not sent to any server or stored in the browser)

<center>![4.png](https://cdn.steemitimages.com/DQmdwLJLyedKFa1AmoHruj8r6oQ4TctXiiMyCtR5hTfCKQU/4.png)</center>

Finally click on “Broadcast Transaction” to send it to the blockchain. A message will appear telling if it was successful (including a link to the transaction) or if there is an error in the transaction.
<center>![5.png](https://cdn.steemitimages.com/DQmQ1n6ydAJEKCjcaGjLUcog6mcg1ywxiFH2bZhCWTzoqiK/5.png)
<sup>Transaction on https://steemd.com/@fulanitodetal</sup></center>

### Part 2. Sign any type of transaction
#### Step 1 - Write the operation
As you will realize, the [sign page](https://joticajulian.github.io/msteem/#/sign) could be used to sign any type of transaction. To see a complete list of operations visit https://developers.steem.io/apidefinitions/#apidefinitions-broadcast-ops.

Following the request of the [task](https://steemit.com/steem/@timcliff/steem-developer-bounty-1500-steem-multisignature-transaction-guide-details-inside):
> example that walks through the steps for this scenario: One of the key holders of the account wants to transfer 5.0 STEEM tokens to another user. The transaction should be signed with keys one, four, and five (which would exceed the 40% threshold).

In this case the operation is
```
[
  "transfer",
  {
    "from": "fulanitodetal",
    "to": "jga",
    "amount": "5.000 STEEM",
    "memo": "test using multisignatures"
  }
]
```

Click on “Add headers” to include the operation in a transaction

#### Step 2 - Signatures
Now the transaction is ready to be signed. If you have all private keys insert one by one and click Sign. Following the example, when I put the private keys of:

| key/account | weight |
--- | ---
`STM6qcCgixB2VHbr6Pq2tDPSUY7u5sPvYbQsRQnn7PDd6SQkSsTq9` | 25
`STM8dDCS2bAEpUPRxS7kGrfPE8kQ7FW4ZZLyJjhmbX6Jvieof3JfZ` | 10
jga | 10
**Total weight** | 45

Then these signatures are added to the transaction:
```
"signatures": [
"203b83b9bc0bcd4f043e506224dde9a45b3f6f6d949ef4f59a53e7651a8dab19c75a70d51c3ffe780c9e580cc51df8cd0e5547c5de17252bd66831b9b4a4293445",

"1f61514c26d10c4820d56a27d9d400867a018947533762091474b338be2bff68af4e1e8a228ff8a181899e74f9a8f4d9b2a45085390b45ac84357f8ce990c83d8c",

"2040e154eb8b3023c23275698ce165613d786fa50b433be4aa87e67dc39712cc99584418d67809b9ea24e2ad9cde54a0daf4aacfc54ac20507d0ab5139cd6543cc"
]
```

If instead, you don’t have the required private keys, send the transaction to the authorized people, ask them to sign and send back to you the signatures. At the end just append all signatures as shown above.

#### Step 3 - Broadcast transaction
Now the transaction is ready to be broadcasted to the blockchain. Click on “Broadcast Transaction”. A message will appear telling if it was successful (including a link to the transaction) or if there is an error in the transaction.

<center>![6.png](https://cdn.steemitimages.com/DQmcFim86ewtCuqWkeqrAcivTDXpQh7sjs7ZMhiA451ZLQw/6.png)
<sup>[Transaction 8330650be8d363c9f0a27d18508dc0493df1a75b](https://steemd.com/tx/8330650be8d363c9f0a27d18508dc0493df1a75b)</sup></center>

### Technology Stack
This page was developed in vue.js and uses the [dsteem](https://jnordberg.github.io/dsteem/) library to query, sign and broadcast transactions to the blockchain.
Although it asks for the user’s private keys, these are never sent to any server or stored in the browser. It only uses them to sign the transaction. I would have liked to use steemconnect, however at present, steemconnect do not support updates to authorities.

#### Relevant commits
- [basic template modify authorities](https://github.com/joticajulian/msteem/commit/f3766b17c69064178c1c2b59846da9c59584ab7f)
- [sign transaction - component](https://github.com/joticajulian/msteem/commit/7351361de3d83efedd9f6e678eddfc09d5064971)
- [page to generate keys](https://github.com/joticajulian/msteem/commit/41673b6aa0ecc233b9c0c425bdbf680d64f20e86)
- [minor fixes](https://github.com/joticajulian/msteem/commit/5b2251c6a909270e6957faeea01dbe06bedec561#diff-371572b146e2218912c090fa05e34b30)

#### GitHub Account
https://github.com/joticajulian
👍  , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , and 1003 others
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created2019-01-09 10:48:09
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vote details (1067)
@helo ·
$14.07
- Good article that feels like something between an announcement post and a tutorial.
- Think about adding code samples to your next posts as this should 
 be development article
- The code looks good, and the demo site is a nice touch.
- Perhaps this is not needed: 
![](https://cdn.steemitimages.com/DQmZWwxBos4yTRxtKBh39ns2s438LvSWNyZHeN6vL26us6w/image.png)
or this: `msteem/src/components/HelloWorld.vue`

Your contribution has been evaluated according to [Utopian policies and guidelines](https://join.utopian.io/guidelines), as well as a predefined set of questions pertaining to the category.

To view those questions and the relevant answers related to your post, [click here](https://review.utopian.io/result/3/2-2-1-1-1-2-2-).

---- 
Need help? Write a ticket on https://support.utopian.io/. 
Chat with us on [Discord](https://discord.gg/uTyJkNm). 
[[utopian-moderator]](https://join.utopian.io/)
👍  , , , , , , , , , , , , , , ,
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vote details (16)
@utopian-io ·
Thank you for your review, @helo! Keep up the good work!
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@steem-ua ·
#### Hi @jga!

Your post was upvoted by @steem-ua, new Steem dApp, using UserAuthority for algorithmic post curation!
Your post is eligible for our upvote, thanks to our collaboration with @utopian-io!
**Feel free to join our [@steem-ua Discord server](https://discord.gg/KpBNYGz)**
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@luegenbaron ·
Thanks for your work.
Really excited about multi signature

Posted using [Partiko Android](https://steemit.com/@partiko-android)
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@pennsif ·
This post has been included in the latest edition of  [**SOS Daily News**](https://steemit.com/steem/@pennsif/sosdailynewsnewsaboutthestateofsteem9january2019-csus4vv1m9) - a digest of all you need to know about the State of Steem.

***

* *Editor of the [**The State of Steem SoS Daily News**](https://steemit.com/steem/@pennsif/sosdailynewsnewsaboutthestateofsteem9january2019-csus4vv1m9).*

* *Promoter of [**The State of Steem SoS Weekly Forums**](https://steemit.com/steem/@pennsif/the-state-of-steem-forum-3-supported-by-dsound-thursday-10-january-8pm-11pm-utc-msp-waves).*

* *Editor of the [**weekly listing of steem radio shows, podcasts & social broadcasts**](https://steemit.com/mspwaves/@pennsif/schedule-of-radio-shows-podcasts-and-social-broadcasts-supported-by-dsound-week-beginning-7-january-2019).*

* *Founder of the [**A Dollar A Day**](https://steemit.com/adollaraday/@adollaraday/a-dollar-a-day-charitable-giving-project-ususd-5000-donated-in-8-months-we-made-it) charitable giving project.*

***
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@thecryptodrive ·
$0.15
Thanks for your entry @jga, your submission is a good one for the Multisig bounty, however winners were already finalised on a first acceptable entry basis; @BuildTeam will still be sponsoring you a Steemvoter Guild vote for your great efforts, incoming shortly.
👍  , , , , , ,
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vote details (7)
@steemvoter ·
@buildteam and @steemvoter are proud to award you a Steemvoter Guild vote for your efforts in contributing to the multisig bounty.

<center>https://steemitimages.com/DQmQyUEXjJ16T7Gz76ZxrsykLPgrN2SYW26ike8kWpKJ3ea/image.png</center>
👍  
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vote details (1)
@steemitboard ·
Congratulations @jga! You have completed the following achievement on the Steem blockchain and have been rewarded with new badge(s) :

<table><tr><td>https://steemitimages.com/60x70/http://steemitboard.com/@jga/voted.png?201901130426</td><td>You received more than 5000 upvotes. Your next target is to reach 6000 upvotes.</td></tr>
</table>

<sub>_[Click here to view your Board](https://steemitboard.com/@jga)_</sub>
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@utopian-io ·
Hey, @jga!

**Thanks for contributing on Utopian**.
We’re already looking forward to your next contribution!

**Get higher incentives and support Utopian.io!**
 Simply set @utopian.pay as a 5% (or higher) payout beneficiary on your contribution post (via [SteemPlus](https://chrome.google.com/webstore/detail/steemplus/mjbkjgcplmaneajhcbegoffkedeankaj?hl=en) or [Steeditor](https://steeditor.app)).

**Want to chat? Join us on Discord https://discord.gg/h52nFrV.**

<a href='https://steemconnect.com/sign/account-witness-vote?witness=utopian-io&approve=1'>Vote for Utopian Witness!</a>
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@steevebot ·
$0.10
This story was recommended by Steeve to its users and upvoted by one or more of them.

Check @steeveapp to learn more about Steeve, an AI-powered Steem interface.
👍  
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vote details (1)
@crypto.piotr ·
Dear @jga

Are you still visiting Steemit sometimes? I would like to get in touch with you if you don't mind.

Would you be kind and tell me what language did you use to create your site?

https://joticajulian.github.io/check-votes/

Yours
Piotr
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@jga ·
hi @crypto.piotr. Yes, you can contact me here, or in discord #jga0699.
In [check votes](https://github.com/joticajulian/check-votes) I use javascript and jquery, and the steem-js library to interact with the blockchain. But in my recent contributions I use vue-js instead of jquery.
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@hobo.media ·
$0.25
Hey @jga,

I'd really like the chance to chat with you about this site you have. It is a great site and I look forward to seeing your updates on it. 

I have an offer for you. The HoboDAO is a concept of creating a federation of multisig accounts formed like DAOs for the creation of a decentralized curation community empowered by its own token. 

Your site helps non-techies navigate multisig operations. This is perfect for the HoboDAO project. We're a small project, but we're really picking up steam. We now have 17,500 SP delegations and we're gaining delegations by the day. 

The Hobo token is selling at low volume but there is daily liquidity on the SE market and we're not even running our curation program yet. We have many delegators delegating to earn tokens on a monthly basis and several people have enrolled in our Ambassador program to translate our announcements to local language communities. 

I would very much like to coordinate with you to see if you would agree to support our project by managing your own msteem site for our community. 

If you agreed to join our discord server and act as tech support to our members when they have difficulty using your site, we would reward you in 100,000 Hobo tokens per month. 

This is a negotiable point, but if you would make your site available via IPFS it is something our project very much wants for decentralization. 

Please accept an invitation to join the HoboDAO project as a member in this decentralized community and join our discord server here: https://discord.gg/TFzSuYE
👍  
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vote details (1)
@jga ·
$0.22
ok, interesting, let's talk about the project!
👍  
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