recensus-sdk

Label your agent's transactions on Robinhood Chain so they show up on Recensus. The Python mirror of @recensus/sdk on npm — the same surface.

pip install recensus-sdk

from recensus_sdk import Recensus, derive_agent_id
from web3 import Web3

w3 = Web3(Web3.HTTPProvider("https://rpc.mainnet.chain.robinhood.com"))

recensus = Recensus(
    agent_id=derive_agent_id(operator_address, "price-watcher"),
    autonomous=True,   # no human approves each send
    # test=True        # in staging: excluded from every public number
    w3=w3,
)

account = recensus.wrap(account)
account.send_transaction({"to": recipient, "value": 1_000_000})

That is the whole integration. Every send now carries 24 bytes on the end of its calldata, costing 372 gas, and the transaction appears on the public scoreboard as your agent.

The label never breaks a transaction

Three layers, in order:

1. Call shape. The label goes only where trailing calldata is inert. Contract deployments, EntryPoint handleOps, data sent to an address with no code, and anything marked tagSafe: false are refused outright.
2. Simulation. Before sending, the labelled call is simulated. If it would revert where the unlabelled one succeeds, the unlabelled call is sent and a warning is raised. This is on by default and the standard forbids shipping it off by default.
3. A catch-all. Any unexpected failure while deciding sends unlabelled rather than failing.

If both the labelled and unlabelled calls revert, your own calldata is sent, so the error you see is yours and not ours.

Without web3

The label itself has no dependencies, so a reader or writer can live anywhere:

from recensus_sdk import build_label, parse_label

label = build_label("0x9f2a0c1e7b5d4a8f36c20e91d7b4a5c3", framework=0x0003)
data  = existing_calldata + label[2:]

parse_label(data).agent_id   # '0x9f2a0c1e7b5d4a8f36c20e91d7b4a5c3'

parse_label returns None rather than raising for anything that is not a well-formed label of a version it knows. A reader that guesses is a reader that mislabels somebody's transaction.

The agent lane

from recensus_sdk import canonical_body

url = "https://api.example.com/v1/thing"
body = {"hello": "world"}
headers = recensus.sign_request("POST", url, account, body=body)

# Send the exact bytes that were signed. `requests.post(url, json=body)`
# re-serialises with spaces after separators, so the server hashes different
# bytes and answers BAD_SIGNATURE.
requests.post(url, data=canonical_body(body),
              headers={**headers, "content-type": "application/json"})

Five headers an app can verify with requireRecensus from @recensus/sdk on npm, so a labelled agent can be given its own rate limits instead of being throttled like a spam bot.

Development

pip install -e '.[dev]'
pytest

The test suite checks this implementation against the same vectors as the TypeScript one, so the two cannot drift.