CDP SDK documentation

CDP Python SDK

The CDP Python SDK enables the simple integration of crypto into your app. By calling Coinbase’s CDP APIs, the SDK allows you to provision crypto wallets, send crypto into/out of those wallets, track wallet balances, and trade crypto from one asset into another.

CDP SDK v0 is a pre-alpha release, which means that the APIs and SDK methods are subject to change. We will continuously release updates to support new capabilities and improve the developer experience.

Documentation

Requirements

Checking Python Version

Before using the SDK, ensure that you have the correct version of Python installed. The SDK requires Python 3.10 or higher. You can check your Python version by running the following code:

python --version
pip --version

If you need to upgrade your Python version, you can download and install the latest version of Python from the official Python website. For pip, refer to the official pip documentation for installation instructions.

Installation

pip install cdp-sdk

if you prefer to manage dependencies with Poetry:

poetry add cdp-sdk

Starting a Python REPL

To start a Python REPL:

python

Quickstart

Creating a Wallet

To start, create a CDP API key. Then, initialize the CDP SDK by passing your API key name and API key’s private key via the configure method:

from cdp import *

api_key_name = "Copy your API key name here."

api_key_private_key = "Copy your API key's private key here."

Cdp.configure(api_key_name, api_key_private_key)

print("CDP SDK has been successfully configured with CDP API key.")

Another way to initialize the SDK is by sourcing the API key from the JSON file that contains your API key, downloaded from the CDP portal.

Cdp.configure_from_json("~/Downloads/cdp_api_key.json")

print("CDP SDK has been successfully configured from JSON file.")

This will allow you to authenticate with the Platform APIs.

If you are using a CDP Server-Signer to manage your private keys, enable it with

Cdp.use_server_signer = True

Now create a wallet. Wallets are created with a single default address.

# Create a wallet with one address by default.
wallet1 = Wallet.create()

print(f"Wallet successfully created: {wallet1}")

Wallets come with a single default address, accessible via default_address:

# A wallet has a default address.
address = wallet1.default_address

Funding a Wallet

Wallets do not have funds on them to start. For Base Sepolia testnet, we provide a faucet method to fund your wallet with testnet ETH. You are allowed one faucet claim per 24-hour window.

# Fund the wallet with a faucet transaction.
faucet_tx = wallet1.faucet()

# Wait for the faucet transaction to complete.
faucet_tx.wait()

print(f"Faucet transaction successfully completed: {faucet_tx}")

Transferring Funds

See Transfers for more information.

Now that your faucet transaction has successfully completed, you can send the funds in your wallet to another wallet. The code below creates another wallet, and uses the transfer function to send testnet ETH from the first wallet to the second:

# Create a new wallet wallet2 to transfer funds to.
wallet2 = Wallet.create()

print(f"Wallet successfully created: {wallet2}")

transfer = wallet1.transfer(0.00001, "eth", wallet2).wait()

print(f"Transfer successfully completed: {transfer}")
Gasless USDC Transfers

To transfer USDC without needing to hold ETH for gas, you can use the transfer method with the gasless option set to True.

# Create a new wallet wallet3 to transfer funds to.
wallet3 = Wallet.create()

print(f"Wallet successfully created: {wallet3}")

# Fund the wallet with USDC with a faucet transaction.
usdc_faucet_tx = wallet1.faucet("usdc")

# Wait for the faucet transaction to complete.
usdc_faucet_tx.wait()

print(f"Faucet transaction successfully completed: {usdc_faucet_tx}")

transfer = wallet1.transfer(0.00001, "usdc", wallet3, gasless=True).wait()

Listing Transfers

# Return list of all transfers. This will paginate and fetch all transfers for the address.
list(address.transfers())

Trading Funds

See Trades for more information.

wallet = Wallet.create("base-mainnet")

print(f"Wallet successfully created: {wallet}")
print(f"Send `base-mainnet` ETH to wallets default address: {wallet.default_address.address_id}")

trade = wallet.trade(0.00001, "eth", "usdc").wait()

print(f"Trade successfully completed: {trade}")

Listing Trades

# Return list of all trades. This will paginate and fetch all trades for the address.
list(address.trades())

Re-Instantiating Wallets

The SDK creates wallets with Developer-Managed (1-1) keys by default, which means you are responsible for securely storing the keys required to re-instantiate wallets. The below code walks you through how to export a wallet and store it in a secure location.

# Export the data required to re-instantiate the wallet. The data contains the seed and the ID of the wallet.
data = wallet.export_data()

In order to persist the data for the wallet, you will need to implement a store method to store the data export in a secure location. If you do not store the wallet in a secure location you will lose access to the wallet and all of the funds on it.

# You should implement the "store" method to securely persist the data object,
# which is required to re-instantiate the wallet at a later time. For ease of use,
# the data object is converted to a dictionary first.
store(data.to_dict())

For convenience during testing, we provide a save_seed method that stores the wallet’s seed in your local file system. This is an insecure method of storing wallet seeds and should only be used for development purposes.

To encrypt the saved data, set encrypt to True. Note that your CDP API key also serves as the encryption key for the data persisted locally. To re-instantiate wallets with encrypted data, ensure that your SDK is configured with the same API key when invoking save_seed and load_seed.

# Pick a file to which to save your wallet seed.
file_path = "my_seed.json"

# Set encrypt=True to encrypt the wallet seed with your CDP secret API key.
wallet.save_seed(file_path, encrypt=True)

print(f"Seed for wallet {wallet.id} successfully saved to {file_path}.")

The below code demonstrates how to re-instantiate a wallet from the data export.

# You should implement the "fetch" method to retrieve the securely persisted data object,
# keyed by the wallet ID.
fetched_data = fetch(wallet.id)

# imported_wallet will be equivalent to wallet.
imported_wallet = Wallet.import_data(fetched_data)

To import Wallets that were persisted to your local file system using save_seed, use the below code.

# Get the unhydrated wallet from the server.
fetched_wallet = Wallet.fetch(wallet.id)

# You can now load the seed into the wallet from the local file.
# fetched_wallet will be equivalent to imported_wallet.
fetched_wallet.load_seed(file_path)

Creating a Webhook

A webhook is a way to provide other applications with real-time information from the blockchain. When an event occurs on a blockchain address, it can send a POST request to a URL you specify. You can create a webhook to receive notifications about events that occur in your wallet or crypto address, such as when a user makes a transfer.

from cdp.client.models.webhook import WebhookEventType
from cdp.client.models.webhook import WebhookEventFilter

wh1 = Webhook.create(
    notification_uri="https://your-app.com/callback",
    event_type=WebhookEventType.ERC20_TRANSFER,
    event_filters=[WebhookEventFilter(from_address="0x71d4d7d5e9ce0f41e6a68bd3a9b43aa597dc0eb0")]
)
print(wh1)

Creating a Webhook On A Wallet

A webhook can be attached to an existing wallet to monitor events that occur on the wallet, i.e. all addresses associated with this wallet. A list of supported blockchain events can be found here.

import cdp

wallet1 = Wallet.create()
wh1 = wallet1.create_webhook("https://your-app.com/callback")
print(wh1)

Examples

Examples, demo apps, and further code samples can be found in the CDP SDK Python Documentation.

Contributing

See CONTRIBUTING.md for more information.