• fetch and display account transactions
• set interval and refresh them every 3s

• name: configure
• configuration:

{
   rpcUrl: string;
   explorerUrl?: string  //empty tx list if this is not provided;
   unit: {
      symbol: string;
     decimals: number;
   };
  addressPrefix: number;
}

- save configuration to plugin state
- either throw rpc error if missing or use default configuration(westend?!)
- refactor code to use configuration

If context argument of log methods is exception, we should log exception stacktraces.
I would suggest we have flag to enable/disable stacktraces or to log them at verbose level

Stop using polkascan to show old transactions and save executed transactions to snap state.

Things to display:

• connect button - it's suppose to install metamask snap
  • if metamask is not present display overlay to hide data until metamask is available
  • after connect, replace with public address
• account balance
• account transactions
• button to export private key
• section to sign custom message
  • text area and button sign
• section to transfer
  • to address
  • amount
  • send button

You can use this page to create some wireframe: https://wireframe.cc/

• add dropdown to choose polkadot network
• run configure on snap when network changes
• refresh data

• don't create polkadot asset automatically
• subscribe on balance change after the asset is added

Use Metamask app key and
@polkadot/keyring to generate Polkadot account (private and public key).

Account should be generated on connect event/call.

Store account in plugin state: https://github.com/MetaMask/metamask-snaps-beta/wiki/Snaps-API#the-snaps-wallet-api

Don't forget to request appropriate permissions in snap confgiurations

We need to fix how adapter package is displayed on npm:
https://www.npmjs.com/package/@nodefactory/metamask-polkadot-adapter

Some action items:

• add readme file with some important information and pills (ci status, license, version etc)
• add keywords to package.json
• add github repo urls to package.json (check the npm docs (or similar monorepos), link should probably include relative path to package directory)

• sendUnit rpc method
  • should accept recipient address
  • amount
• integrate in example page

Documentation: https://github.com/MetaMask/metamask-snaps-beta/wiki/Snaps-API#custom-asset-management

• you should fetch balance for generated account from public node
• balance should be displayed in Metamask

Doesn't seem to be working at all as balance is not displaying. Noted error in the console.

FATAL: Unable to initialize the API: createType(Metadata):: Unable to create Enum via index 12, in V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11

MetamaskInpageProvider - lost connection to MetaMask RpcProvider
Error: StreamMiddleware - Unknown response id 2951923128
at chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:276079
at h.write [as _write] (chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:276195)
at v (chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:371323)
at chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:374439
at h.g.write (chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:374466)
at a.b (chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:363746)
at d (chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:95984)
at a.o.emit (chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:98970)
at _ (chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:358585)
at w (chrome-extension://dlemoigadagaakbfkaflkknjpidifbji/inpage.js:1:358400)

In order to get the Snap confirmation to load, I had to uninstall the Snap and reinstall it. Edit: I am using v10.16.2-flask.0 of MetaMask Flask.

• try to update polkadot libraries
• make sure everything works as expected

Hopefully, you won't encounter ses issues, otherwise we will have to deal with that 🥠

We should specify callback types based on event name:
https://medium.com/@bterlson/strongly-typed-event-emitters-2c2345801de8

• given tx hash it should listen if tx is executed and deliver receipt
• integrate in example page
  • display loading (disable tx sending component)
  • display receipt in dialog

It's currently commented out, but should work without throwing bunch of errors (maybe because of disconnect.

• signMessage rpc method
• integrate into example page

Refactor subscription to follow these rules:

• Subscribe on first call or first call after unregistering
• Unregister when all listeners are removed

• expose getPublicKey rpc api (without params)
• method should returned public key of generated account
• display that public key after connect in index.html

• run locally https://github.com/NodeFactoryIo/apps
• on new branch use adapter to inject extension (use yarn link if adapter is not released yet)
• on accounts page, it should list metamask account also

Expose event listener for inBlock and finalized statuses of transaction send using RPC method sendUnit.

In January of 2021, MetaMask made a number of breaking changes to the Snap provider API. The largest change was to remove the injected window.web3 instance. Additionally, the following breaking changes were made

• Stop 0-padding eth_chainId return values for some chains
• Stop emitting chainIdChanged, and instead emit chainChanged
• Removing ethereum.publicConfigStore
• Removing the ethereum._metamask.isEnabled experimental method
• Removing the ethereum._metamask.isApproved experimental method

This ticket is for tracking an investigation into how these API changes will affect the project in this repository. See MetaMask's migration guide for more details.

• all rpc method should be available in api handler
• refactor example to use api handler

• add adapter as dependency in example
• when mounting Root/App component call injectMetamaskPolkadotSnapProvider
• add and use https://github.com/polkadot-js/extension/tree/master/packages/extension-dapp to get provider and execute actions
• stuff that is not supported by this library (configure, addPolkadotAsset etc) will have to be fetched with

const allInjected = await web3Enable('my cool dapp');
allInjected["metamask-js"].getMetamaskApi().configure(...)

Note: this isn't exact code, you will have to investigate and debug stuff (probably do some casting and custom types)

• should pass address and receive balance updates (tx)
• integrate into example page
  • update balance
  • append tx

• should be rpc method
• look into creating new permission that has to be requested by dapp (maybe confirmation screen)

Documentation should be in readme.md and include:

• arhitecture (dapp->adapter->snap-> provider) graph
• InjectedExtension additional api
• document available methods and event listening
• example how to add to own dapp (using injectedExtension)

• fetch and display polkadot address using snap api
• fetch and display polkadot public key using snap api
• fetch and display latest block details
  • subscribe and refetch block every
• fetch and display address balance
  • set interval and fetch falance every 3s
• display latest block slot

Metamask should only show unit asset for currently selected network.

This project is currently using a rather old version of the Polkadot-JS API (it appears it's using v1.24, when the current version is somewhere around v8.3). This project should be updated to use a more recent version of the Polkadot API.

• create subdirectory "adapter"
• yarn init
• library should provide following interface
  • injectMetamaskPolkadotProvider(network: "kusama"|"polkadot")
  • injectMetamaskPolkadotProvider(config: {explorerUrl, rpcUrl, unitName})
• library should wrap "ethereum" object and methods in foloowing interface: https://github.com/polkadot-js/extension#api-interface

• extend Injected interface with method getMetamaskSnapApi in which you will create and return following object:

interface MetamaskSnapApi {
   addAsset(): Promise<void>
  ...rest of snap methods
}

Following the steps in the README, I installed Metamask snaps beta release and executed yarn&& yarn run demo , When I want to connect to metamask there is only this output on the console

MetaMask has some limited support for hardware wallets (Ledger and Trezor at time of writing).

Will this Polkadot snap interoperate with that layer of MetaMask, effectively producing hardware wallet support for signing Polkadot transactions, etc?

There does seem to be an emerging Polkadot app for Ledger: https://wiki.polkadot.network/docs/en/learn-ledger

Thank you.

• check if there is metamask available
  • display message to install metamask if there isn't one
• "connect" button should invoke "wallet_enable" method on metamask
  • on success it should display dashboard
  • handle errors with error message

status(https://github.com/MetaMask/faq/blob/master/DEVELOPERS.md)
- should be returned to connect in case account is changed or metamask is locked