CAIP-23: Blockchain Reference for Filecoin Namespace Source

Author Sergey Ukustov
Discussions-To TBD
Status Superseded
Type Standard
Created 2020-08-26
Requires 2
Superseded By

Simple Summary

This document is about the details of the Filecoin network namespace and reference for CAIP-2.


In CAIP-2 a general blockchain identification scheme is defined. This is the implementation of CAIP-2 for Filecoin network.


See CAIP-2.


Filecoin Namespace

The namespace “fil” refers to the wider Filecoin ecosystem.

Reference Definition

The reference relies on Filecoin’s current designation of addresses belonging to test or main networks by prefixing them with t or f correspondingly.

Reference could only be populated with f or t symbols.


Blockchains in the “filecoin” namespace are Filecoin blockchains, i.e. Filecoin mainnet, Filecoin testnet, and few devnets.

Backwards Compatibility

Not applicable

Test Cases

This is a list of manually composed examples

# Testnet and Devnets

# Mainnet

Copyright and related rights waived via CC0.


Please cite this document as:

Sergey Ukustov, "CAIP-23: Blockchain Reference for Filecoin Namespace," Chain Agnostic Improvement Proposals, no. 23, August 2020. [Online serial]. Available: