Missing data parameter ? about ethereum-qr-code HOT 5 CLOSED

@Reminouche , hi
That was done intentionally

Currently supported URI scheme: ethereum:<address>[?from=<sender_address>][?value=<ethamount>][?gas=<suggestedGas>]. This used to send ETH between accounts.

If you need to invoke specific method of the contract - please, see this part of readme: https://github.com/jibrelnetwork/ethereum-qr-code#2-invoke-function-of-a-contract

What is the reason to support [?data=<bytecode>]?
I can imagine only one use-case - when you want to deploy a new contract.
But this is not a purpose of QR code :)

from ethereum-qr-code.

Yea i saw your invoke function feature, but imagine :

I have a web application wich needs to pass some parameters to ether contract.

If user interacts with your contract via a qr code, there are no problems (user passes data with function parameters).

But if he wants to send a transaction directly from a eth wallet (online web wallet for example), it is a little bit complex for a user to format a correct json into data message field. I think it could be easier for him to send hexacode directly in data.

from ethereum-qr-code.

We miss something

QR code used to transfer info between two apps.
This is the only purpose of the QR code.
I.e.:

• you have an app A1 which needs to invoke a contract
• this app A1 packs needed info to invoke a contract
• another app A2 manages your private keys
• app A2 receives packed info, unpacks it, signs transaction, sends the transaction to the network

Generally, you can use anything to pack data. A text file will work just fine.
But we use QR code because it is handier for end-user.

The user is not able to interact with the contract via QR code.
User does not need to create json - data should be combined with the app A1

If you develop app A1 and need to pass some data to the contract - just use field argsDefaults.
You can set any value to the function argument there

Real use case: you come to the shop and want to buy bread with some TOKEN

• cashier creates a receipt for 5 Euro
• cashier creates QR code to send 100 TOKEN to his account
• you scan QR code with the smartphone
• app on your smartphone reads data from the QR code and creates an interface to send tokens
• you check encoded data (receiver address, number of tokens) and confirms a transaction
• app on your smartphone combines transaction and sends it to the network

As I see, there is no place for compiled data parameter...

from ethereum-qr-code.

Also, I do not know about widely used Ethereum wallets that support QR codes and data parameter. Most known Ethereum wallet and myetherwallet do not support QR codes at all...

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Closing for now, since there was no activity on this issue for 3 days.
@Reminouche feel free to reopen if you have further proposal.

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