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Table of Contents

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High-level Specification

Functionality

Details

FIO App Account Types

Alternative Account

  • Alternative Account should only contain

    • FIO Public Key

    • Account Type

      • Primary

      • Alternative

  • Alternative Account

  • FIO Public Key in Account Conflict Resolution

    • The same FIO Public Key could exist in Primary account and Alternative account and those would be considered separate accounts

      • Example:

        • User A creates Primary Account using email and password

        • User A imports seed phrase ABC

        • User A connects to FIO App using Metamask which has seed phrase ABC installed

        • User A has 2 different accounts:

          • Primary Account

            • Key generated by EDGE

            • Key imported using seed phrase ABC (Account index 0)

          • Alternative Account

            • Key imported using seed phrase ABC (Account index 0)

    • However, when user has an Alternative Account, they can access the same Account using different methods

      • Example:

        • User A connects to FIO App using Metamask which has seed phrase ABC installed

        • In a different browser User A connects to FIO App using Opera which has seed phrase ABC installed

        • Only a single account exists and is simultaneously accessed from Metamask and Opera

  • Multiple Wallets

    • For Alternative Accounts, users can Create New Wallets. When they do each additional Wallet is the next index in the derivation path (same as for Dashboard Ledger Wallet)

    • For Alternative Accounts, users can add a Ledger Wallet.

Sign-in

  • The Sign-in and Account creation process is transparent to the user

  • Process

    • User signs a nonce using FIO Public Key for index 0

    • FIO App fetch FIO Public Key for index 0

    • Create Account - if FIO Public Key is not associated to an account, create account

    • Log user in

Sign Transaction

  • Transaction signing occurs in specific wallet

  • Transaction json should be shown

Metamask SNAP

...

Overview

Metamask Snap is an extension of Metamask browser plug-in, which allows for new functionality, e.g. ability to sign transactions on a non-EVM chain.

The FIO Snap allows Metamask users to gain access to the FIO App and execute transactions without having to create an account, which requires email and password.

Sign-in Flow

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customContentId799244302
updatedAt2024-01-09T16:42:48Z

Sign Transaction Flow

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uuida8e67555-ec07-4772-98af-2b9dab781332
customContentId743571457
updatedAt2023-10-12T20:24:18Z

Inside SNAP Functionality

Visual

Functionality

FIO Handle Resolution

image-20240909-182644.pngImage Added
  • Overview

    • When user has the FIO Snap installed, FIO Handles will be resolved inside MetaMask on send.

  • Manifest spec - this ensures OnNameLookupHandler receives any data typed for any chain

Code Block
languagejson
"endowment:name-lookup": {
  "chains": [
    "eip155:1",
    "eip155:10",
    "eip155:56",
    "eip155:61",
    "eip155:137",
    "eip155:324",
    "eip155:1101",
    "eip155:5000",
    "eip155:8453",
    "eip155:42161",
    "eip155:42220",
    "eip155:43114",
    "eip155:59144",
    "eip155:7777777"
  ]
}
  • Look-up logic

    • Verify that the string received matches the FIO Handle format

    • Convert chainId to chain_code and token_code based on the following (chainId, chain_code, token_code)

      Code Block
      eip155:1,ETH,ETH
      eip155:10,OP,ETH
      eip155:56,BSC,BNB
      eip155:61,ETC,ETC
      eip155:137,POL,POL
      eip155:324,ZKSYNC,ETH
      eip155:1101,POLZK,ETH
      eip155:5000,MNT,MNT
      eip155:8453,BASE,ETH
      eip155:42161,ARB,ETH
      eip155:42220,CELO,CELO
      eip155:43114,AVAX,AVAX
      eip155:59144,LINEA,ETH
      eip155:7777777,ZORA,ETH
    • Execute /get_pub_address

    • Return public address

    • Example OnNameLookupHandler

Code Block
languagetypescript
export const onNameLookup: OnNameLookupHandler = async (request) => {
  const { chainId, address, domain } = request;

  if (domain) {
    const resolvedAddress = '0xc0ffee254729296a45a3885639AC7E10F9d54979';
    return {
      resolvedAddresses: [{
        protocol: 'FIO Handle',
        resolvedAddress: resolvedAddress,
        domainName: domain,
      }]
    };
  }

  return null;
};

DEV NOTE: specification: https://metamask.github.io/SIPs/SIPS/sip-12

SNAP Home Page

No FIO Handle and No FIO Tokens and No Pending FIO Requests

image-20240422-164358.pngImage Added

1+ FIO Handles and >0 FIO Tokens and 1+ FIO Requests

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Inside FIO App Functionality

Visual

Functionality

Process

Authenticate

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Image Added

  • Set-up SNAP

    • Install FIO SNAP

    • Grant SNAP Permissions

  • Sign-in

    • Have user sign nonce with FIO Private Key

      • SNAP Message

        • Title: Sign-in to FIO App

        • Description:
          Please approve this nonce signature to sign-in to the FIO App. Nonce signature proves that you are the owner of the associated FIO Public Key.
          ------------------------------------
          Random nonce: XXX

  • If user rejects any of these steps display error message

...

Sign Transaction

...

Image Added

Visual

Functionality

Process

  • Sign-in

    • Have user sign nonce with FIO Private Key

  • If user rejects any of these steps display error message

    Image Added

    • Trigger transaction sign in Metamask

    • SNAP Message

      • Title: Sign FIO Transaction

      • Description:
        Please approve the following transaction.
        Transaction name: trnsfiopubky
        ------------------------------------
        FIO Chain: FIO Mainnet
        ------------------------------------
        Transaction details:
        tpid: dashboard@fiouat
        max_fee: 1500000000000
        amount: 100000000000000
        payee_public_key: FIO68bYHgYTqc17jz9MuprzvUY9D7Ud9UmLzruiNiFGkaHMZNUDv5

    Decrypt Content

    • When decrypting content of FIO Request or FIO Data, trigger decrypt content transaction in Metamask. If

    • SNAP Message

      • Title: Decrypt FIO Data

      • Description:
        Please approve the decryption of FIO Data. For your security and privacy, FIO Data is always encrypted and has to be decrypted before viewing.

    Sign out

    FIO_Dashboard - 2023 Revised - MetaMask - Dashboard-20240216-194149.pngImage Added

    • Replace Sign out with Disconnect button with icon