Hive Namespace - CAIP-2 Chain Identifiers

CAIP-2

For context, see the CAIP-2 specification:

Rationale

Hive defines a 32-byte (64 hex characters) chain_id value used for transaction signing and network identification.

Because CAIP-2 restricts the reference field to a maximum of 32 characters, this specification defines the reference as:

The first 32 lowercase hexadecimal characters of Hive’s chain_id.

This approach ensures:

• Deterministic chain identification
• Compatibility with CAIP-2 length constraints
• Collision resistance appropriate for blockchain network identifiers
• Alignment with other CAIP-2 namespace implementations

Specification

Namespace

hive

Reference

The reference MUST:

• Be lowercase hexadecimal
• Match the pattern: [0-9a-f]{32}

Resolution

To derive a valid CAIP-2 identifier:

1. Query a Hive node using database_api.get_config.
2. Retrieve the HIVE_CHAIN_ID value from the response.
3. Convert to lowercase.
4. Truncate to the first 32 hexadecimal characters.

Example Request

{
  "jsonrpc": "2.0",
  "method": "database_api.get_config",
  "id": 1
}

Example Response (partial)

{
  "HIVE_CHAIN_ID": "beeab0de00000000000000000000000000000000000000000000000000000000"
}

Known Networks (Non-Normative Examples)

Hive Mainnet

Full chain_id: beeab0de00000000000000000000000000000000000000000000000000000000 CAIP-2: hive:beeab0de000000000000000000000000

Hive Mirrornet

Full chain_id: 42 CAIP-2: hive:42000000000000000000000000000000 (zero-padded to 32 hex characters)

Note: The mirrornet is a periodic snapshot of mainnet used for testing. There is no permanent public testnet at this time; mirrornet instances are ephemeral.

Security Considerations

Applications MUST validate network configuration before accepting CAIP-2 identifiers.

Hive uses account-based identity rather than address-based identity. Applications implementing CAIP-10 should validate account existence via RPC.

Test Cases

hive:beeab0de000000000000000000000000
hive:42000000000000000000000000000000

References

• Hive configuration

Copyright

Copyright and related rights waived via CC0 1.0.

Citation

Please cite this document as:

["@feruzm"], "namespaces/hive-caip2: Hive Namespace - CAIP-2 Chain Identifiers [DRAFT]," Chain Agnostic Namespaces, hive-caip2, February 2026 / . [Online serial]. Available: https://github.com/ChainAgnostic/namespaces/hive-caip2.md