How to convert different Filecoin addresses programmatically?

[longfeiWan9]

Filecoin address types:

• f0 - ID address for any address on Filecoin
• f1 - secp256k1 wallet address
• f2 - actor address
• f3 - BLS wallet address
• f410 - Ethereum-compatible address

There are a couple of libraries you can use for the address conversion.

• glif/filecoin-address
• izari-filecoin

Conversion

f410 <-> 0x

1. 0x -> f410
   we are going to use glif/filecoin-address library. So you need to install it into your project first.
   npm install @glif/filecoin-address
   Then you can write code to convert your eth address to Filecoin f410 address.

   const {newDelegatedEthAddress} = require('@glif/filecoin-address')
   
   const filAddress = newDelegatedEthAddress('0x44061AA8Df5b33a997CE97d80c700d0C655Dc3f2');
   console.log(filAddress.toString());
   

2. f410 -> 0x
   we can also use glif/filecoin-address library.

   const {ethAddressFromDelegated} = require('@glif/filecoin-address')
   
   const ethAddress = ethAddressFromDelegated('f410f2oekwcmo2pueydmaq53eic2i62crtbeyuzx2gmy');
   console.log(ethAddress.toString());
   

f0 -> 0x

All Filecoin addresses (f1, f2, f3) will have a unique ID address assigned to it, and this ID address will be finalized after 900 epochs. ID address can be converted to 0x address which could be used to send FIL to your other Filecoin wallet using Ethereum-compatible tools.

const ethIDAddress = ethAddressFromID('t01073');
console.log(ethIDAddress.toString());
// output: 0xff00000000000000000000000000000000000431

f1/f2/f3 <-> f410 or 0x

You cannot.

[Stebalien]

Anyone reading this should also read glifio/modules#318. There isn't a 1:1 mapping between 0x and f4, so the instructions here aren't quite correct.

[longfeiWan9]

A new JSON-RPC API FilecoinAddressToEthAddress was introduced with Lotus V1.29.0 releases to enable querying 0x address for any types of Filecoin addresses.

• f410 -> 0x
  t410fghja63ghyzd54cbswfapglsutx5e64xnm7mazwi -> 0x31d20f6cc7c647de0832b140f32e549dfa4f72ed
• f1/f2/f2: will return 0x address for their corresponding f0 ID address.
  f1alg2sxw32ns3ech2w7r3dmp2gl2fputkl7x7jta -> 0xff00000000000000000000000000000000000064

You can learn how to use this API here.