basic wallet functions

[changtimwu]

• A mobile wallet has to built-in some functions of a web3 provider.

  Survey

• Prelimaries
  • a web3 test page -- done
  • use wallet address not hard code address.
  • Current EIP 712
• Cipher browser
  • [x] basic send/receive
  • [x] test eth_sign --> incorret. Cipher thought this as send.
  • [x] test eth_signTypedData --> excellient! it shows every name/value pairs.
• study how to do sign proof
  • [x] microraiden's way
• figure the difference
  • On Node: web3js -> infura(EVM)
  • On Browser: web3js -> metamask(provider) -> infura(EVM)

Roadmap

• pure ETH send
  • [ ] API
  • [ ] UI
• contract execution
  • [ ] API
  • [ ] UI
• eth.signTypedData
  • [ ] API
  • [ ] UI

explain

• API: web3 provider aka backend
• UI: web3 provider caller aka frontend

accessory functions

• receipent address input
  • [ ] QR code
  • [ ] NFC

[changtimwu]

RN Webview

• use: https://stackoverflow.com/questions/38963046/can-i-use-webview-inside-a-view-react-native
• javascript injection: https://medium.com/capriza-engineering/communicating-between-react-native-and-the-webview-ac14b8b8b91a
• metamask inejection: https://github.com/petejkim/metamask-mobile/tree/master/src/injections

[changtimwu]

3 components

• dApp
• user wallet
• EVM

The whole problem becomes

• How much metamask should we inject into the WebView?
• In what we injected, which part should be rewritten for good mobile experience?

• Goal

• Full fledge of web3.js APIs to run any dApp or
• minimum set of web3.js to support L2 payment operations.

[changtimwu]

select L2 payment network

• to get contract address and POA site
• network disclaimer
• show as credit card

TOP up

• send ETH/DAI to certain address
• always should current balance

Make payment

• trig by user selecting a card
• use NFC reading or QR code scanning to get amount and reciever's address
• show a dialog to confirm payment by Touch/Face ID

payment receive

• log/record and notification is done by the POA site
• show balance proof as receipt

withdraw

• a screen show current off-chain balance and confirm to withdraw
• notify senders?

consideration

• are payment receive and withdraw be done in a mobile client? maybe would be enough.

[changtimwu]

state channel simple operator interface.

receiver = business owner = operator

• one click deploy
• what to fill before deploy
  • receiver's address
  • select token's contract address

public page

• an introduction who the receiver is
• contract address
• define a JSON schema for the above for operator
• explorer?
• lost recovery

admin page

• basic info
• on-chain and off-chain balance
• transaction log
• report
  • abnormal payment
• balance

[changtimwu]

operator code deploy

• AWS code deploy
• heroku and Azure

[changtimwu]

https://gist.github.com/amiller/0a569536c2b5e99b307b853cbba810f6