A registrar is a service that registers Blockstack IDs and then transfers them to the respective users, along with writing/updating any associated data. Just like GoDaddy helps you manage domain names, a Blockstack ID registrar helps you register/manage your Blockstack ID. However, the end-users have complete control over the Blockstack IDs registered (after a transfer is complete), and anyone can decide to run a registrar.

Blockstack IDs

Usernames may be up to 40 characters long and contain lowercase letters, numbers, and underscores.

Note: usernames with ANY uppercase letters will be ignored by crawlers, so make sure to only use lowercase letters when you register a name.

Regex: ^[a-z0-9_]{1,60}$

Registration

To register a Blockstack ID:

choose an available username
construct a valid JSON object that adheres to the profile schema specifications
register the username and profile

HD Wallet

Registrar comes with support a hierarchical deterministic wallet.

from registrar.wallet import HDWallet
from registrar.wallet import display_wallet_info

wallet = HDWallet()

no_of_children = 5

addresses = wallet.get_keypairs(no_of_children, include_privkey=False)
display_wallet_info(addresses)

License

GPL v3. See LICENSE.