WebUSB support

[nchabra]

Is it possible to use the WebUSB JS library to use the app API?

My first experiments using LedgerJS did not bring any success.
I am not able to establish the transport connection with the app.
I did confirm the BtcApp works well.

[cslashm]

@btchip

[OR13]

Same question, I looked at the internals and it seems like there is an api for this: https://github.com/LedgerHQ/ledgerjs/blob/master/packages/hw-app-eth/src/Eth.js#L230

But it would need to provide a similar interaction to the one used by the GPG Agent, and I'm not sure about the difficulty or security implications of doing that.

[cedelavergne-ledger]

Hi,
Today, there is a limltation on the number of endpoints, and we can't use CCID (mandatory for smartcards) and WebUSB at the same time.

We'll look later if it can be changed.