At the API level, Crypto Wallets work the following way:
Crypto-US
View API
import os
from synapse_pay_rest import Client
from synapse_pay_rest import User
from synapse_pay_rest.models.nodes import CryptoUsNode
user = User.by_id(client, '5b3a6085ad388f0069c67c31')
crypto_payload = {
'nickname': 'Crypto Wallet'
}
crypto_us = CryptoUsNode.create(user, **crypto_payload)