filsnap

Connect to Filecoin dapps using Metamask. Manage Filecoin accounts, send FIL to Native and FEVM accounts and enable FEVM transaction insights.

Usage

You can install and use filsnap using the Metamask provider.

import { getRequestProvider } from 'filsnap-adapter'

const provider = await getRequestProvider()

// Install filsnap
try {
  const result = await provider.request({
    method: 'wallet_requestSnaps',
    params: {
      'npm:filsnap': {
        version: '^0.4.0', // Optional, defaults to latest
      },
    },
  })

  console.log(result)
  /**
{
  'npm:filsnap': {
    version: '1.0.0',
    id: 'npm:filsnap',
    enabled: true,
    blocked: false,
  },
}
   */
} catch (error) {
  console.log(error)
}

import { getRequestProvider } from 'filsnap-adapter'

const provider = await getRequestProvider()
// Get filsnap metadata
const result = await provider.request({ method: 'wallet_getSnaps' })

console.log(result)
/**
{
  'npm:filsnap': {
    version: '1.0.0',
    id: 'npm:filsnap',
    enabled: true,
    blocked: false,
  },
}
 */

import { getRequestProvider } from 'filsnap-adapter'

const provider = await getRequestProvider()
// Get filsnap metadata
const result = await provider.request({
  method: 'wallet_invokeSnap',
  params: { snapId: 'npm:filsnap', method: 'fil_getBalance' },
})

console.log(result)
/**
{
  result: '100699819802794525019',
  error: null
}
 */

We recommend using filsnap-adapter to interact with filsnap for a simpler interface. Check the full API documentation here.

RPC Methods

• fil_configure - Configure the snap.
• fil_getBalance - Get the balance of the connected account.
• fil_getAddress - Get the address of the connected account.
• fil_getPublicKey - Get the public key of the connected account.
• fil_getAccountInfo - Get the account info of the connected account.
• fil_getGasForMessage - Get the gas for a message.
• fil_signMessage - Sign a message with the connected account.
• fil_signMessageRaw - Sign a raw message (string) with the connected account.
• fil_exportPrivateKey - Export the private key of the connected account.
• fil_sendMessage - Send a message.

Check the full RPC methods documentation here.

Architecture

sequenceDiagram
    participant Dapp
    box rgb(76, 86, 106) Metamask Extension
    participant Metamask
    participant filsnap
    end
    Dapp-)Metamask: connect('npm:filsnap', '0.4.0')
    Note over Dapp,Metamask: `wallet_requestSnaps`
    Metamask--> Metamask: Install filsnap
    Metamask--)filsnap: Connect Dapp to filsnap
    activate filsnap
    filsnap--)Metamask: Connected
    Metamask-)Dapp: filsnap metadata
    Dapp-)filsnap: configure({network: 'mainnet'})
    Note over Dapp,Metamask: `wallet_invokeSnap` method `fil_configure`
    filsnap-)Dapp: filsnap configuration
    Dapp-)filsnap: getBalance()
    Note over Dapp,Metamask: `wallet_invokeSnap` method `fil_getBalance`
    filsnap-)Dapp: 100 FIL (balance)
    deactivate filsnap

Current limitations

• Multiple accounts are not supported yet. Only the first account is used.
  • One workaround currently supported is to use the derivation path from the configuration to get the account you want to use.
• Ledger is not supported, this is a Metamask limitation.
• There's no UI native in the extension for the user to interact with the snap, this is a Metamask limitation.
• Transaction insights are supported but forces the Filsnap tab to be opened even if the snap doesn't return any data. This is a Metamask limitation.

Recommendations for future work

• Add support for multiple accounts.
• Sync with Metamask team to work through the limitations.

Contributing

Read contributing guidelines here.

License

Dual-licensed: MIT, Apache Software License v2, by way of the Permissive License Stack.