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CAIP 23specificationSupersededaddresseschain-identification

Blockchain Reference for Filecoin Namespace

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

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Sergey Ukustov (@ukstv)·Updated Mar 29, 2026·0 reviews·0 attestations·View source
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Specification

Simple Summary

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

Abstract

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

Motivation

See CAIP-2.

Specification

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.

Rationale

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
fil:t

# Mainnet
fil:f

Links

Copyright

Copyright and related rights waived via CC0.

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