Arweave Namespace - Chains

Author Rohit Pathare, Phil Billingsby, Dan MacDonald
Status Draft
Type Standard
Created 2022-09-01
Requires CAIP-2


For context, see the [CAIP-2][] specification.


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

Arweave Namespace

The namespace “arweave” refers to the wider Arweave ecosystem.

Reference Definition

The reference relies on Arweave’s current designation of addresses belonging to main network by prefixing them with 7wIU which is the representation of the hash of the genesis block truncated to the first 4 characters.


Arweave has one blockchain, the Blockweave.

Backwards Compatibility

Not applicable.

Test Cases

This is a manually composed example.

# Arweave Mainnet



Copyright and related rights waived via CC0.


Please cite this document as:

Rohit Pathare, Phil Billingsby, Dan MacDonald, "namespaces/arweave-caip2: Arweave Namespace - Chains [DRAFT]," Chain Agnostic Namespaces, arweave-caip2, September 2022 / . [Online serial]. Available: