augmint/augmint-web

Augmint Web Frontend

Augmint - Stable Digital Tokens - Web Frontend

Concept

Decentralized stablecoins targeted to fiat currencies built on Ethereum.

The first Augmint token is AEUR.

1 AEUR ≈ 1 EUR.

• Buy and sell AEUR for ETH or EUR.
• Get a loan in AEUR by depositing ETH.
• Lock AEUR to earn a premium.

Try it: https://www.augmint.org

Manifesto

White Paper

Related repos

• Augmint javascript library: augmint-js
• Solidity contracts: augmint-contracts

Get in touch

• [email protected]
• Discord server
• Telegram

Contribution

Augmint is an open and transparent project.

We are seeking for great minds to extend our core team. Contribution in any area is much appreciated: development, testing, UX&UI design, legal, marketing spreading the word etc.

Code of Conduct

Development environment setup

Authors

See team on www.augmint.org

The project was born at DECENT Labs

Concept, initial version

• szerintedmi
• Charlie

Check the whole team on augmint.org

Licence

This project is licensed under the GNU Affero General Public License v3.0 license - see the LICENSE file for details.

augmint-web's Issues

hamburger menu on mobile

Default fee & repayment grace period

Proposal: dailly 1 thousandth of the amount due, from the maturity day after, reason: the outstanding due and not repaid cause an inflationary push.User must have incentive to be punctual. The default fee equal with the accrued thousandth during the grace period.

Decimals on UI

e.g.
UCD = 25,2
ETH = 25,234

check if need reentrancy protection

• placeSellUcdOrder and placeSellEthOrder
• transfer functions
• repay loan
• new loan
• collect loan (?)
• check all other txs if needed

display tokenUcd & exchange pending balances

similar as for user pending balances: pending ETH reserve, UCD reserve and tokenSupply balance
TBD: shall we always display pending balances instead and indicate it's not confirmed?

UCD transfer fail handling

need to throw if fails & handle on client side
maybe do it together with transaction history (ie. events need to be emitted for that)

Tx failure not shown on UI when on testrpc with Metamask

UI hangs in submitting status after submit when tx fails with invalid opcode (eg. loan amount too low) despite MetaMask shows tx failed.
MetaMask/metamask-extension#2060

Sell ETH from reserve for UCD

Feature to send ETH from token reserve to sell for UCD (on 1:ethUSD rate)
Any user can buy from that, UCD from sale goes to Market Reserve balance
Requires separate contract(s)

order amount

why is the number 2 here, see picture in case of both users?

add collect loan button to loan details page

so that anyone call it if tokenUcd fails to do batch collection for any reason

introduce UCD transfer fees

deducted from every UCD transfer, minamount: param (0.01 UCD?), txFee: 0.001%
collect to separate contract
TBD:

• UX of displaying it: we won't create a separate transaction entry , it would be too expensive. But user transactions displayed won't sum up to balance. We could calculate tx fee on client side and display it? What if txFee % changes later?
  --> fee amount added to emitted events, FE displays it
• how to treat internal transfers?
  won't deduct, use systemTransfer for internal transfers

loan collateral computation error

Product 7 - Repay in a few seconds
Collateral (goes to escrow): put a number beginning with 3 it Will divide 3 times the amount from your eth balance e.g. 3000 collateral divide 9000

publish website

disbursed amount is 0.01 UCD higher than displayed

When disbursed amount is two digits then rounding is different by client than contract.
E.g. 1ETH entered, displayed 160.77 UCD disbursed on client but actual disbursed is 160.78

balances not refreshed with Metamask on onNewBlock recevied

User and tokenUcd balances are not refreshed with Metamask when executing tx from other browser - newblock event received but it fetches the original balances

to reproduce:

1. open two browser windows, one using Metamask
2. create a new loan (or transfer UCD) in the window which doesn't use Metamask
3. balances are not refreshed (totalsupply or user's UCD balance) in the Metamask browser window despite newBlock event received and processed

When using a browser without Metamask then it works properly.

it's only on testrpc, must be tested with real chain

Use safe math in all contract

truffle migrate error

$ truffle migrate --reset
Compiling .\contracts\ERC20Impl.sol...
Compiling .\contracts\EthBackedLoan.sol...
Compiling .\contracts\Exchange.sol...
Compiling .\contracts\LoanManager.sol...
Compiling .\contracts\OrdersLib.sol...
Compiling .\contracts\Owned.sol...
Compiling .\contracts\Rates.sol...
Compiling .\contracts\TokenUcd.sol...

Compilation warnings encountered:

/C/Users/Iroda/desktop/ucd-poc/contracts/OrdersLib.sol:20:9: Warning: Variable i s declared as a storage pointer. Use an explicit "storage" keyword to silence th is warning.
Order[] orders;
^------------^
,/C/Users/Iroda/desktop/ucd-poc/contracts/OrdersLib.sol:36:9: Warning: Variable is declared as a storage pointer. Use an explicit "storage" keyword to silence t his warning.
OrderData order;
^-------------^

Writing artifacts to .\build\contracts

Using network 'development'.

Running migration: 1_initial_migration.js
Replacing Migrations...
... undefined
Error encountered, bailing. Network state unknown. Review successful transaction s manually.
Error: Error: Exceeds block gas limit
at StateManager.queueTransaction (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\ node_modules\ethereumjs-testrpc\build\cli.node.js:102477:21)
at GethApiDouble.eth_sendTransaction (C:\Users\Iroda\AppData\Roaming\nvm\v8. 2.1\node_modules\ethereumjs-testrpc\build\cli.node.js:102066:14)
at GethApiDouble.handleRequest (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\no de_modules\ethereumjs-testrpc\build\cli.node.js:101882:10)
at next (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\node_modules\ethereumjs-t estrpc\build\cli.node.js:52856:18)
at VmSubprovider.handleRequest (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\no de_modules\ethereumjs-testrpc\build\cli.node.js:59803:12)
at next (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\node_modules\ethereumjs-t estrpc\build\cli.node.js:52856:18)
at GethDefaults.handleRequest (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\nod e_modules\ethereumjs-testrpc\build\cli.node.js:101787:12)
at next (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\node_modules\ethereumjs-t estrpc\build\cli.node.js:52856:18)
at FilterSubprovider.handleRequest (C:\Users\Iroda\AppData\Roaming\nvm\v8.2. 1\node_modules\ethereumjs-testrpc\build\cli.node.js:59362:7)
at next (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\node_modules\ethereumjs-t estrpc\build\cli.node.js:52856:18)
at Object.InvalidResponse (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\node_mo dules\truffle\build\cli.bundled.js:37295:16)
at C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\node_modules\truffle\build\cli. bundled.js:224765:36
at C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\node_modules\truffle\build\cli. bundled.js:66971:11
at C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\node_modules\truffle\build\cli. bundled.js:208348:9
at XMLHttpRequest.request.onreadystatechange (C:\Users\Iroda\AppData\Roaming \nvm\v8.2.1\node_modules\truffle\build\cli.bundled.js:209773:13)
at XMLHttpRequestEventTarget.dispatchEvent (C:\Users\Iroda\AppData\Roaming\n vm\v8.2.1\node_modules\truffle\build\cli.bundled.js:67130:18)
at XMLHttpRequest._setReadyState (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\ node_modules\truffle\build\cli.bundled.js:67420:12)
at XMLHttpRequest._onHttpResponseEnd (C:\Users\Iroda\AppData\Roaming\nvm\v8. 2.1\node_modules\truffle\build\cli.bundled.js:67575:12)
at IncomingMessage. (C:\Users\Iroda\AppData\Roaming\nvm\v8.2.1\no de_modules\truffle\build\cli.bundled.js:67535:24)
at emitNone (events.js:110:20)

000 and decimal separators on amounts

My UCD loans UI

just thinking

UI enhancement home page

display ETH transfer history

user has 2 accounts, UCD and ETH, the history shows only the UCD transactions ,
we may show also the ETH history too

Connect rates contract to a better mock

Eg. piggyback oraclize's pricing contract
if connected then UI should refresh rates at every new block (?)

send back remainder ETH less default fee on collection

When loan defaults the collection should send back the remainder (if any) from the collateral (calculated on actual eth/usd rates) less default fee (parameter % of collateral, 5% to start with).

As part of this task we collect defaulting fee to augmintToken contract, separate collection to feeAccount might implemented later (when we will implement collection caller reward)

Add client side validations

• new loan: Min loan amount & ETH balance
• Repay loan: f sufficient UCD balance
• Buy/Sell UCD: ETH/UCD balance
• Buy/Sell UCD: min amounts when #31 resolved
• ...

Get a UCD loan page

Get a UCD loan
Get an UCD loan

Page info panel:
You can get UCD for ETH collateral.
When you repay the UCD on maturity you will get back all of your ETH.
If you decide not to repay the UCD loan then your ETH will be taken to system reserves, except any excess amount. above the value of your loan and fee obligations which will be transferred to your ETH account

Discount rate info text
Disbursed UCD amount / amount due on maturity,
e.g. Loan amount is 150 UCD discount rate is 95% then
disbursed loan sum is 142,5 UCD.

Loan coverage ratio Loan/ Collateral ratio
info text:
Loan/ Collateral ratio (L/C)
UCD loan amount./USD value of ETH collateral,
e.g. loan amount is 3 000 UCD, L/C= 80%, you need to put in escrow 3 750 USD worth of ETH,
that is 18, 75 ETH if 1,0 ETH= 200 USD.

Min disbursed loan amount: Min. pay out:

Repay period: Repayment period:
info text:
...and your ETH collateral will go to the system reserves, except any excess amount. above the value of your loan and fee obligations which will be transferred to your ETH account

yarn fails

$ yarn start
yarn start v0.27.5
$ node node_modules/cross-env/dist/bin/cross-env.js NODE_PATH=./src react-script s start
module.js:487
throw err;
^

Error: Cannot find module 'webpack/lib/node/NodeTemplatePlugin'
at Function.Module._resolveFilename (module.js:485:15)
at Function.Module._load (module.js:437:25)
at Module.require (module.js:513:17)
at require (internal/module.js:11:18)
at Object. (C:\Users\Iroda\Desktop\ucd-poc\node_modules\html-webp ack-plugin\lib\compiler.js:11:26)
at Module._compile (module.js:569:30)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:503:32)
at tryModuleLoad (module.js:466:12)
at Function.Module._load (module.js:458:3)
at Module.require (module.js:513:17)
at require (internal/module.js:11:18)
at Object. (C:\Users\Iroda\Desktop\ucd-poc\node_modules\html-webp ack-plugin\index.js:7:21)
at Module._compile (module.js:569:30)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:503:32)
error Command failed with exit code 1.

Navigating from long page doesn't scroll to top on target page

E.g. form scroll down on home page, click on concept link navigates to the middle of concept page

https://reacttraining.com/react-router/web/guides/scroll-restoration

Loans to collect list doesn't refresh after collection

change window.web3

https://github.com/ethereum/mist/releases/tag/v0.9.0

UCD ECOSYSTEM ACCOUNTING

https://docs.google.com/spreadsheets/d/1R5RURTLQv0XBY46XN3RVojHdv9LAQcNJbYZeg1ig_CU/edit?usp=sharing

first draft, to be discussed
a double book keeping model
only some parts requires coding
it is the core UCD part only
ETH part should be prepared to
**The purpose to create the ecosystem's indicators for monetary management ** ( market intervention)

display pending transactions

TBD: shall we give user confirmation on form and have a global component (eg. in EthereumState.js) with list of pending txs + confirmation numbers

Token UCD page

for intervention management,
needed info on the state of the UCD monetary balances

new data to this page:

1. **Open loan obligations: **
   it is the sum of the Open loans amounts
   2 . ** User token balance: **
   it is the sum of all users UCD accounts or Total token supply -UCD Reserve
2. Hot/cold (+/-)token
   equals: User token balance - Open loan obligations

Example:
Total token supply: 2829900 UCD
UCD Reserve: 142474 UCD

User token balance: 2687426 UCD

Loans
Loan amount: 2808000 UCD
Loan amount: 7000 UCD
Loan amount: 500 UCD
Loan amount: 5000 UCD
Open loan obligations: 2820500 UCD

User token balance - Open loan obligations=
Hot/cold (+/-)token -133074 UCD

UX tip: UCD and ETH amounts here in a separate column

Refresh UI if account changed (Metamask)

deploy to private chain

create private chain creation and launch scripts, test migration and app

refactor balance refresh

we refresh user and tokenUcd balances onNewBlock
that's not ideal:

1. transaction is pending right after submission so only pending balances are updated
2. too many unnecessary refreshes on test networks

check onNewBlock if it's a block relevant to user/tokenUcd/exchange and/or do refresh on relevant log events

error when trying to repay last loan with Metamask

trying to repay last loan, got error but only with Metamask

"Repay loan failed. Error: Error: Error: [ethjs-rpc] rpc error with payload {"id":6483394661779,"jsonrpc":"2.0","params":[{"from":"0xd912aecb07e9f4e1ea8e6b4779e7fb6aa1c3e4d8","to":"0x066a1db4199b08d3b05e59523214ed1959636b81","value":"0x0","data":"0x371fd8e60000000000000000000000000000000000000000000000000000000000000004","gas":"0x2dc6c0","gasPrice":"0x4a817c800"}],"method":"eth_estimateGas"} Error: Error: VM Exception while executing eth_estimateGas: invalid opcode\n at /usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:59880:17\n at /usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:88044:5\n at /usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:11863:9\n at /usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:8423:16\n at replenish (/usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:8943:25)\n at iterateeCallback (/usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:8933:17)\n at /usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:8908:16\n at /usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:11860:13\n at /usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:88040:9\n at /usr/local/lib/node_modules/ethereumjs-testrpc/build/cli.node.js:73948:7\n at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:43905:26\n at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:64306:9\n at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:10069:16\n at iterateeCallback (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:9934:17)\n at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:10085:16\n at next (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:72912:9)\n at resultObj.id (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:64286:9)\n at chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:10160:16\n at replenish (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:9954:17)\n at iterateeCallback (chrome-extension://nkbihfbeogaeaoehlefnkodbefgpgknn/scripts/background.js:9939:17)"

different error message when Metamask is not unlocked

Collision bug?

started UCD client opened in mozzilla
loans, and orders
then started another account from metamask/Chrome
opposite order placed , executed wanted to see transaction history of the other account in mozzilla then came these error messages in both browser

what to do?

BUy/sell page UI

implement ERC-223

consider implementing ERC-223

Get ucd loan - exact amount

Loan amount (to be payed back)
you give an exact amount of 500, get back az a loan 499,9999 UCD loan
in case of instant/short maturities

render static pages

prerendering enabled on netlify but it needs to be tested if suits and/or use this method:
https://medium.com/superhighfives/an-almost-static-stack-6df0a2791319

My Account UI proposal

new loan: Min loan amount & eth balance validation on client side

add more info in repay loan success page

eth amount released from escrow

UCD/ETH exchange rounding, min amounts and remainder handling

UCD/ETH orders and order fills should be rounded.
Introducing min amounts for orders will help
Still a question of how to handle small remainders from conversions. Eg. 100 UCD for sell, 98.80 filled - what to do with the .20? Same with ETH.

narrative for UCD transfers

Loan details UI

tidy up new loan success page

eg. link to my account + link to loan details
maybe use standard loan details component (handle that new loan might not be loaded yet)

deploy to testnet

test deployment to Ropsten and/or Rinkeby and test app
create/update scripts for deployment