Python Client Reference

Nillion Client Python module.

class py_nillion_client.Amount

ByteSize()

Returns the size of the message in bytes.

Clear()

Clears the message.

ClearExtension()

Clears a message field.

ClearField()

Clears a message field.

CopyFrom()

Copies a protocol message into the current message.

DESCRIPTOR *= *

DiscardUnknownFields()

Discards the unknown fields.

Extensions

Extension dict

FindInitializationErrors()

Finds unset required fields.

FromString()

Creates new method instance from given serialized data.

HasExtension()

Checks if a message field is set.

HasField()

Checks if a message field is set.

IsInitialized()

Checks if all required fields of a protocol message are set.

ListFields()

Lists all set fields of a message.

MergeFrom()

Merges a protocol message into the current message.

MergeFromString()

Merges a serialized message into the current message.

ParseFromString()

Parses a serialized message into the current message.

static RegisterExtension(field_descriptor)

SerializePartialToString()

Serializes the message to a string, even if it isn’t initialized.

SerializeToString()

Serializes the message to a string, only for initialized messages.

SetInParent()

Sets the has bit of the given field in its parent message.

UnknownFields()

Parse unknown field set

WhichOneof()

Returns the name of the field set inside a oneof, or None if no field is set.

class py_nillion_client.Array(value)

This is a Array class used to encode a secret array of elements.

Note: __len__ method is implemented to allow getting the length of the array.

• Parameters: value (list) – List of secret encoded elements.
• Returns: Instance of the Array class.
• Return type: Array
• Raises: ValueError – invalid secret type: Raises an error when a public encoded element is included inside a secret array.

Example

import py_nillion_client as nillion

secret_array = nillion.Array([
    nillion.SecretInteger(1),
    nillion.SecretInteger(2),
])

print("The length of the array is: ", len(secret_array))

>>> The length of the array is: 2

value

Getter method for the value inside a Array instance.

• Returns: List of secret encoded elements.
• Return type: list

Example

print("My secret array: \n", secret_array.value)

>>> My secret array:
>>>  [, ]

exception py_nillion_client.AuthenticationError

Error related to authentication: invalid password, public key, or other internal errors

args

with_traceback()

Exception.with_traceback(tb) – set self._traceback_ to tb and return self.

class py_nillion_client.ClusterDescriptor

The ClusterDescriptor contains attributes that describe the cluster configuration. It includes information about:

1. Cluster id;
2. Security parameters (statistical security and security threshold);
3. Parties (nodes) in the cluster;
4. Preprocessing configuration.

This object is returned when invoking NillionClient cluster_information method.

Example

cinfo = await client.cluster_information(args.cluster_id)

id

The Cluster identifier.

• Return type: A string containing the Nillion Cluster identifier.

Example

cinfo = await client.cluster_information(args.cluster_id)
print("Cluster id:", cinfo.id)

>>> Cluster id: 147f8d45-2126-4a54-9a64-8141ee55f51a

kappa

The statistical security parameter kappa for this cluster.

• Return type: The value of the statistical security parameter kappa used in this cluster.

Example

cinfo = await client.cluster_information(args.cluster_id)
print("Statistical sec parameter kappa:", cinfo.kappa)

>>> Statistical sec parameter kappa: 40

parties

Cluster’s parties ids.

• Return type: A list of strings containing the party identifiers in the cluster.

Example

cinfo = await client.cluster_information(args.cluster_id)
print("Cluster parties' ids:", cinfo.parties)

>>> Parties: {'12D3KooWJtRXjmV1HctQgvLUcrdxJ7cXwCHiL6PCheikN2rTJ2ZH',
              '12D3KooWHSveXS4DdXpCQyDDsp9D1x7fiTRnm1fsH9yJRpR6y4FM',
              '12D3KooWLV6HzUXpt6Tt5HUM5Fo3mpjvwsv9n4ADkJ962ArAZCvX'}

polynomial_degree

The polynomial degree used by this cluster. The polynomial degree is directly related with the security threshold of the Nillion network.

• Returns:
  • An integer corresponding to the degree of the polynomial used
  • in the cluster for linear secret sharing.

Example

cinfo = await client.cluster_information(args.cluster_id)
print("Polynomial degree:", cinfo.polynomial_degree)

>>> Polynomial degree: 1

prime

The prime number used in this cluster.

• Return type: The identifier of the prime used in the cluster.

Example

cinfo = await client.cluster_information(args.cluster_id)
print("Prime type:", cinfo.prime)

>>> Prime: U256SafePrime

exception py_nillion_client.ComputeError

Error related to the computation: initialization, scheduling, or other internal errors

args

with_traceback()

Exception.with_traceback(tb) – set self._traceback_ to tb and return self.

class py_nillion_client.ComputeFinishedEvent

The ComputeFinishedEvent class is returned by an async computation when the computation has just finished.

This class has no public constructor and is received from method NillionClient.next_compute_event().

result

The computation’s result, as a FinalResult class.

Use the FinalResult.value() method to obtain the wrapped value.

• Returns: The FinalResult class containing the final result of the computation. Use the FinalResult.value() method to obtain the wrapped value.
• Return type: FinalResult

Example

uuid = await client.compute(
    args.cluster_id,
    bindings,
    [store_id],
    args.compute_secrets,
    args.compute_public_variables,
    payment_receipt
)

while True:
    event = await client.next_compute_event()
    if isinstance(event, nillion.ComputeScheduledEvent):
        pass
    if isinstance(event, nillion.ComputeFinishedEvent) and event.uuid == uuid:
        print(
            f"Received computation result for {event.uuid}, result = {event.result}"
        )
        print(
            f"Received computation result value for {event.uuid}, value = {event.result.value}"
        )
        break

uuid

The computation’s UUID.

• Returns: Uuid
• Return type: str

Example

uuid = await client.compute(
    args.cluster_id,
    bindings,
    [store_id],
    args.compute_secrets,
    args.compute_public_variables,
    payment_receipt
)

while True:
    event = await client.next_compute_event()
    if isinstance(event, nillion.ComputeScheduledEvent):
        pass
    if isinstance(event, nillion.ComputeFinishedEvent) and event.uuid == uuid:
        print(
            f"Result for computation with UUID {event.uuid} is ready!"
        )
        break

class py_nillion_client.ComputeScheduledEvent

The ComputeScheduledEvent class is returned by an async computation when the computation is not finished yet.

This class has no public constructor and is received from method NillionClient.next_compute_event().

uuid

The computation’s UUID. This outputs the same UUID provided by the NillionClient.compute() method.

• Returns: Computation UUID.
• Return type: str

Example

uuid = await client.compute(
    args.cluster_id,
    bindings,
    [store_id],
    args.compute_secrets,
    args.compute_public_variables,
    payment_receipt
)

event = await client.next_compute_event()
if isinstance(event, nillion.ComputeScheduledEvent):
    computation_uuid = event.uuid

class py_nillion_client.ConnectionMode

This is a ConnectionMode class. It designates the connection mode to use in a client constructor. We support three different modes:

1. Dialer (dialer());
2. Direct (direct());
3. Relay (relay()).

dialer()

Specifies the client should connect in dialer mode.

In this mode the client only allows outgoing connections, so no need to listen or open a port. This mode prohibits this client from recieving results, as an output party, from the network.

• Return type: ConnectionMode

Example

connection_mode = ConnectionMode.dialer()

direct()

Specifies a socket address structure for a listening client connection.

This mode is suited for clients that are backend services.

You allow incoming and outgoing connections, they are done directly so you have to listen and have the port open to receive incoming connections. This option is faster than relay as it avoids the extra hop, but requires to have the port open / have port forwarding in NATs and firewalls. This mode requires that the client’s IPv4 address is addressible on the internet.

• Parameters: str – Socket address structure.
• Return type: ConnectionMode

Example

connection_mode = ConnectionMode.direct('0.0.0.0:11337')

relay()

Specifies the client connects to the Nillion Network in relay mode. So, if others want to contact the client, they have to do so through a relay node that the client is connected to (all nodes in the network are relay nodes).

This mode is suited for clients that cannot open a port like phones behind a CGNAT, desktop apps behind a NAT or Firewall, and others.

You allow incoming and outgoing connection but the incoming are established via a node in the network (the relayer) so that you don’t need to listen and open a port. This is slower than direct because it adds another hop in the connection but allows to bypass NATs and Firewalls. Also this option adds more load to the p2p network of the nodes becasue they have to do the relay increasing the incoming and outgoing traffic

• processing of secure connections.

• Return type: ConnectionMode

Example

connection_mode = ConnectionMode.relay()

exception py_nillion_client.DealerError

Error related to the dealer: initialization, scheduling, unexpected errors

args

with_traceback()

Exception.with_traceback(tb) – set self._traceback_ to tb and return self.

class py_nillion_client.FinalResult

This is a FinalResult class that is returned from a finished computation.

This class has no public constructor and is received from method ComputeFinishedEvent.result().

value

The resulting value of a computation.

• Returns: Result value from a computation.
• Return type: Dict

Example

uuid = await client.compute(
    args.cluster_id,
    bindings,
    [store_id],
    args.compute_secrets,
    args.compute_public_variables,
    payment_receipt
)

while True:
    event = await client.next_compute_event()
    if isinstance(event, nillion.ComputeScheduledEvent):
        pass
    if isinstance(event, nillion.ComputeFinishedEvent) and event.uuid == uuid:
        print(
            f"Received computation result value for {event.uuid}, value = {event.result.value}"
        )
        break

class py_nillion_client.Integer(value)

This is a Integer class used to encode a public variable value as an integer.

Note: __eq__ method is implemented to allow to compare two integers.

• Parameters: value (int) – Value of the public encoded element.
• Returns: Instance of the Integer class.
• Return type: Integer

Example

import py_nillion_client as nillion

pub_integer_1 = nillion.Integer(1)
pub_integer_2 = nillion.Integer(2)

print("Are the public integers the same? ", pub_integer_1 == pub_integer_2)

>>> Are the public integers the same?  False

value

Getter and setter for the value inside a Integer instance.

• Returns: The value of the public integer.
• Return type: int

Example

pub_integer = nillion.Integer(1)
print("Public integer is: ", pub_integer.value)
pub_integer.value = 2
print("Public integer is now: ", pub_integer.value)

>>> Public integer is:  1
>>> Public integer is now:  2

class py_nillion_client.MsgPayFor

ByteSize()

Returns the size of the message in bytes.

Clear()

Clears the message.

ClearExtension()

Clears a message field.

ClearField()

Clears a message field.

CopyFrom()

Copies a protocol message into the current message.

DESCRIPTOR *= *

DiscardUnknownFields()

Discards the unknown fields.

Extensions

Extension dict

FindInitializationErrors()

Finds unset required fields.

FromString()

Creates new method instance from given serialized data.

HasExtension()

Checks if a message field is set.

HasField()

Checks if a message field is set.

IsInitialized()

Checks if all required fields of a protocol message are set.

ListFields()

Lists all set fields of a message.

MergeFrom()

Merges a protocol message into the current message.

MergeFromString()

Merges a serialized message into the current message.

ParseFromString()

Parses a serialized message into the current message.

static RegisterExtension(field_descriptor)

SerializePartialToString()

Serializes the message to a string, even if it isn’t initialized.

SerializeToString()

Serializes the message to a string, only for initialized messages.

SetInParent()

Sets the has bit of the given field in its parent message.

UnknownFields()

Parse unknown field set

WhichOneof()

Returns the name of the field set inside a oneof, or None if no field is set.

class py_nillion_client.NadaValues(values)

This is a NadaValues class used to hold secrets and public values. It can contain:

1. Secret integers (SecretInteger);
2. Secret unsigned integers (SecretUnsignedInteger);
3. Arrays (Array).
4. Public integers (PublicInteger)
5. Public unsigned integers (PublicUnsignedInteger)

This class is used by the NillionClient.compute() method to pass the secrets used by the corresponding Nada program that are not stored.

• Parameters: values (dict) – A map of named encoded secret and public values to store
• Returns: Instance of the NadaValues class.
• Return type: NadaValues
• Raises: ValueError – invalid public variable type: Raises an error when a public variabel element is included inside the secrets dictionary.

Example

import py_nillion_client as nillion

sec_uinteger = nillion.SecretUnsignedInteger(1)
sec_integer = nillion.SecretInteger(1)
sec_array = nillion.SecretArray([
    nillion.SecretInteger(1),
    nillion.SecretInteger(2),
])

secrets = nillion.NadaValues({
    "sec_uinteger": sec_uinteger,
    "sec_integer": sec_integer,
    "sec_array": sec_array
 })

dict()

Returns the stored values as a dictionary.

• Returns: Native python dictionary with mapped encoded values
• Return type: dict

Example

values = nillion.NadaValues({
    "sec_uinteger": sec_uinteger,
    "sec_integer": sec_integer,
    "sec_array": sec_array
 })

print("Values:\n", values.dict())

>>> Values:
>>>  {'sec_array': , 'sec_uinteger': , 'sec_integer': }

class py_nillion_client.NillionClient(node_key, bootnodes, connection_mode, user_key, whitelist=None)

The NillionClient class serves as the primary tool for connecting to the Nillion network and facilitating various operations. It allows users to interact with the Nillion network efficiently, including for the following actions:

1. Store Nada programs (store_program());
2. Store values (store_values());
3. Update values (update_values());
4. Retrieve values (retrieve_value());
5. Delete values (delete_values());
6. Compute a Nada program over some secrets (compute());
7. Receive compute results (next_compute_event()).

An instance of NillionClient can embody either a dealer node, responsible for providing inputs, or a result node, tasked with receiving computation outputs. Under the hood, this spawns a set of actors and acts as a node in the network that has both dealer and result node capabilities.

Note: multiple instances can be employed concurrently if required; however, it is imperative that each instance possesses a distinct NodeKey when utilized within the same interpreter.

• Parameters:
  • node_key (NodeKey) – A private key to use for the Client node.
  • bootnodes (list of str) – A list of nodes belonging to the network (other may be discovered later).
  • connection_mode (ConnectionMode) – How to connect to the network, either directly (indicating a listen address), through a relay server or as a dialer client.
  • user_key (UserKey) – User credentials to use.
  • whitelist (list of str , optional) – A list of peer ids to connecto to/from.
• Returns: Instance of the NillionClient and an event receiver channel used to retrieve computation results.
• Return type: NillionClient

Example

For further information about the structure of the objects used by the constructor, we refer to the quickstart guide .

import py_nillion_client as nillion

node_key = nillion.NodeKey.from_file("/path/to/node/key")
bootnodes = [os.getenv("NILLION_BOOTNODE_MULTIADDRESS")]
# e.g. bootnodes = ["/ip4/127.0.0.1/tcp/45305/p2p/11E4UiiRgsJILZYeushYEOQyMCrJLeRTaonNxBMBq4oF6bJ6MfoF"]
connection_mode = nillion.ConnectionMode.dialer()
user_key = nillion.UserKey.from_file("/path/to/user/key")

client = nillion.NillionClient(
      node_key,
      bootnodes,
      nillion.ConnectionMode.relay(),
      user_key,
  )

build_version = 'client/0.1.0 (commit: 2454586480c93ea9664ddc563cac902e0bb03278; ts: 1720014719; date: 2024-07-03T13:51:59+00:00)'

cluster_information(cluster_id)

Get information about a cluster by returning an instance of the ClusterDescriptor class. We can access various information about the cluster through its methods.

• Parameters: cluster_id (str) – UUID of the targeted preprocessing cluster.
• Return type: An instance of ClusterDescriptor populated with the cluster information.

Example

await client.cluster_information(cluster_id)

compute(cluster_id, bindings, store_ids, values, receipt)

Requests a compute action in the Nillion Network for a specific Nada program under a set of secrets.

Note: This method does not directly output the result of the Nada program. Instead, it returns a computation UUID. To obtain the result, you’ll need to fetch it separately. The UUID, in conjunction with the event provided by the corresponding NillionClient instance channel, allows you to retrieve the computation results. Please refer to the e xample below for clarification.

• Parameters:
  • cluster_id (str) – UUID of the targeted preprocessing cluster
  • bindings (ProgramBindings) – The prepared program specification and secret bindings
  • secrets (Secrets) – Additional secrets to use for the computation
  • store_ids (list of str) – List of the store IDs (uuids) of the secrets to use for the computation
  • public_variables (PublicVariables) – Public variables to use for the computation
  • receipt (PaymentReceipt) – The receipt for the payment made.
• Returns: A computation UUID.
• Return type: str

Example

import py_nillion_client as nillion

store_payment_receipt   = ... # quote + pay
compute_payment_receipt = ... # quote + pay

bindings = nillion.ProgramBindings(args.program_id)
bindings.add_input_party("Dealer", client.party_id)
store_id = await client.store_values(
    args.cluster_id, bindings, args.store_values, None, store_payment_receipt
)

bindings = nillion.ProgramBindings(args.program_id)
bindings.add_input_party("Dealer", client.party_id)
bindings.add_output_party("Result", client.party_id)

uuid = await client.compute(
    args.cluster_id,
    bindings,
    [store_id],
    args.values,
    compute_payment_receipt
)

while True:
    event = await client.next_compute_event()
    if isinstance(event, nillion.ComputeScheduledEvent):
        pass
    if isinstance(event, nillion.ComputeFinishedEvent) and event.uuid == uuid:
        print(
            f"Received computation result for {event.uuid}, result = {event.result}"
        )
        print(
            f"Received computation result value for {event.uuid}, value = {event.result.value}"
        )
        break

delete_values(cluster_id, store_id)

Delete existing values.

• Parameters:
  • cluster_id (str) – UUID of the targeted preprocessing cluster
  • store_id (str) – The identifier of the stored secret to be deleted (returned when calling store_values())
• Return type: None

Example

await client.delete_values(cluster_id, store_id)

next_compute_event()

Returns the state of the computation in the Nillion Network.

If the event is from an ongoing computation, it only includes the corresponding UUID from the compute() process. Once the computation is complete, the event includes both the UUID and the computation result (FinalResult).

• Returns: Either event type will pull the next compute event from the internal result channel which can be inspected to determine if compute operation has completed
• Return type: ComputeScheduledEvent | ComputeFinishedEvent

Example

uuid = await client.compute(
    args.cluster_id,
    bindings,
    [store_id],
    args.compute_secrets,
    args.compute_public_variables,
    payment_receipt
)

while True:
    event = await client.next_compute_event()
    if isinstance(event, nillion.ComputeScheduledEvent):
        print(
            f"Waiting for computation with UUID={event.uuid} to finish."
        )
    if isinstance(event, nillion.ComputeFinishedEvent) and event.uuid == uuid:
        print(
            f"Received computation result for {event.uuid}, result = {event.result}"
        )
        print(
            f"Received computation result value for {event.uuid}, value = {event.result.value}"
        )
        break

party_id

Returns the SDK client’s instance party ID, which can be used by the client to create program bindings (ProgramBindings, check examples).

Effectively, the party ID is equivalent to the Peer ID used within libp2p for inter-node communication. It is a hash generated from the public key of the node’s key-pair (NodeKey). Not to be confused with the user_id() which is generated from the public key of the user’s key-pair (UserKey).

Read more about party ID and peer ID.

• Returns: UUID of libp2p party identifier.
• Return type: str

Example

print("Party ID:", client.party_id)

request_price_quote(cluster_id, operation)

Request a price quote for an operation. This method asks the network to calculate a price quote for the specified operation. Payment and submission of the operation is the client’s responsibility and must be done before the quote expires.

Note that the nodes of your target Nillion petnet cluster will be bound to a single payment network (eg. testnet).

• Parameters:
  • cluster_id (str) – UUID of the targeted preprocessing cluster
  • operation (Operation) – The operation to get a price quote for.
• Returns: The price quoted for this operation.
• Return type: PriceQuote

Example

secrets = py_nillion_client.Secrets(
    {
         "foo": py_nillion_client.SecretInteger(42),
         "bar": py_nillion_client.SecretBlob(bytearray(b"hello world")),
    }
)
operation = py_nillion_client.Operation.store_values(secrets)
quote = await client.request_price_quote(cluster_id, operation)
# this is where you activate your payment method
txn_hash = yourapp.your_payment_method_in_unil(quote.cost)
payment_receipt = nillion.PaymentReceipt(quote, txn_hash)
store_id = await client.store_values(
    cluster_id, secrets, None, payment_receipt
)

updated_secrets = nillion.Secrets({"foo": nillion.SecretInteger(42)})
operation = py_nillion_client.Operation.update_values(updated_secrets)
quote = await client.request_price_quote(cluster_id, operation)
# this is where you activate your payment method
txn_hash = yourapp.your_payment_method_in_unil(quote.cost)
payment_receipt = nillion.PaymentReceipt(quote, txn_hash)
 await client.update_values(
     args.cluster_id, store_id, update_values, payment_receipt
 )

# compute quote is based on compute time secrets; stored secrets have already
# been paid
secrets = nillion.Secrets({"fortytwo": nillion.SecretInteger(42)})
quote = py_nillion_client.Operation.compute(program_id, secrets)
# this is where you activate your payment method
txn_hash = yourapp.your_payment_method_in_unil(quote.cost)
payment_receipt = nillion.PaymentReceipt(quote, txn_hash)

uuid = await client.compute(
    args.cluster_id,
    bindings,
    [store_id],
    secrets,
    py_nillion_client.PublicVariables({}),
    compute_payment_receipt
)

value_name = "fortytwo"
operation = py_nillion_client.Operation.retrieve_value()
quote = await client.request_price_quote(cluster_id, operation)
# this is where you activate your payment method
txn_hash = yourapp.your_payment_method_in_unil(quote.cost)
payment_receipt = nillion.PaymentReceipt(quote, txn_hash)
result = await client.retrieve_value(cluster_id, args.store_id, value_name, payment_receipt)

program_name = "myprogram"
program_mir_path = f"./your/compiled/programs/{program_name}.nada.bin"
operation = py_nillion_client.Operation.store_program(program_mir_path)
quote = await client.request_price_quote(cluster_id, operation)
# this is where you activate your payment method
txn_hash = yourapp.your_payment_method_in_unil(quote.cost)
payment_receipt = nillion.PaymentReceipt(quote, txn_hash)
program_id = await client.store_program(
    args.cluster_id, program_name, program_mir_path, payment_receipt
)

operation = py_nillion_client.Operation.retrieve_permissions()
quote = await client.request_price_quote(cluster_id, operation)
# this is where you activate your payment method
txn_hash = yourapp.your_payment_method_in_unil(quote.cost)
payment_receipt = nillion.PaymentReceipt(quote, txn_hash)
permissions = await client.retrieve_permissions(cluster_id, store_id, payment_receipt)

operation = py_nillion_client.Operation.update_permissions()
quote = await client.request_price_quote(cluster_id, operation)
# this is where you activate your payment method
txn_hash = yourapp.your_payment_method_in_unil(quote.cost)
payment_receipt = nillion.PaymentReceipt(quote, txn_hash)
permissions = nillion.Permissions.default_for_user(client.user_id())
permissions.add_retrieve_permissions(set([args.retriever_user_id]))
updated_store_id = await client.update_permissions(args.cluster_id, store_id, permissions, payment_receipt)

retrieve_permissions(cluster_id, store_id, receipt)

Retrieve permissions for a group of secrets in the Nillion Network

• Parameters:
  • cluster_id (str) – UUID of the targeted preprocessing cluster
  • store_id (str) – The secrets’ store ID (returned when calling store_values())
  • receipt (PaymentReceipt) – The receipt for the payment made.
• Returns: The permissions
• Return type: Permissions

Example

permissions = await client.retrieve_permissions(cluster_id, store_id, payment_receipt)

retrieve_value(cluster_id, store_id, value_id, receipt)

Retrieve a value stored in the Nillion Network.

To retrieve the value, you need to use the value attribute on the second element of the output tuple. Check the example below to read the value of a secret integer.

• Parameters:
  • cluster_id (str) – UUID of the targeted preprocessing cluster.
  • store_id (str) – The value’s store ID (returned when calling store_values()).
  • value_id (str) – The value’s ID.
  • receipt (PaymentReceipt) – The receipt for the payment made.
• Returns: The value ID as a UUID as well as the value itself.
• Return type: tuple

Example

value_name = "fortytwo"
result = await client.retrieve_value(cluster_id, args.store_id, value_name, payment_receipt)
print("Value ID: ", result[0])
print("Value: ", result[1])

>>> Value ID: 2424a65c-d20c-4635-b864-06c064188dd4
>>> Value: 42

store_program(cluster_id, program_name, program_mir_path, receipt)

Store programs in the Nillion Network.

The program_id used by store_values() and compute() can be built as follows:

client.user_id + "/" + program_name

where client is a NillionClient instantiation and program_name is the name of the program.

• Parameters:
  • cluster. ( * cluster_id - UUID of the targeted preprocessing) –
  • store. ( * program_name - Name of the program to) –
  • stored. ( * program_mir_path - Path to the MIR program being) –
  • made. ( * receipt - The receipt for the payment) –
• Returns: The program identifier associated with the program
• Return type: str

Example

program_name = "prog"
program_mir_path = "programs-compiled/prog.nada.bin"

# Store program in the Network
print(f"Storing program in the network: {program_name}")
program_id = await client.store_program(
    args.cluster_id, program_name, program_mir_path, payment_receipt
)
print("program_id is: ", program_id)

store_values(cluster_id, values, permissions, receipt)

Store values in the Nillion Network.

• Parameters:
  • cluster_id (str) – UUID of the targeted preprocessing cluster
  • secrets (Secrets) – The secrets to store; this is a hash map indexed by secret IDs
  • permissions (Permissions , optional) – permissions to be set. By default the user has update and retrieve permissions on the secret as well as compute permissions for the program bound, should there be a program bound.
  • receipt (PaymentReceipt) – The receipt for the payment made.
• Returns: A store identifier that can be used to retrieve the secret.
• Return type: str
• Raises: TypeError – When using bindings, the input party name provided (e.g. “InputPartyName”) must match the input party name in the Nada program. Otherwise, we get a TypeError.

Example

Here are some examples of how to use this function. Note that to give permissions we use the User ID and to bind a secret to a program we use the Party ID.

###########################
# Example 1 - Simple      #
###########################
# Notice that both bindings and permissions are set to None.
# Bindings need to be set to use secrets in programs
# Permissions need to be set to allow users other than the secret creator to use the secret
secrets = nillion.Secrets({"fortytwo": nillion.SecretInteger(42)})
store_id = await client.store_values(
    cluster_id, secrets, None, payment_receipt
)

###########################
# Example 2 - Permissions #
###########################
permissions = nillion.Permissions.default_for_user(client.user_id)
permissions.add_retrieve_permissions(set([args.retriever_user_id]))
values = nillion.NadaValues({"fortytwo": nillion.SecretInteger(42)})
store_id = await client.store_values(
    cluster_id, secrets, permissions, payment_receipt
)

update_permissions(cluster_id, store_id, permissions, receipt)

Update permissions for a group of secrets in the Nillion Network

• Parameters:
  • cluster_id (str) – UUID of the targeted preprocessing cluster
  • store_id (str) – The secrets’ store ID (returned when calling store_values())
  • permissions (Permissions , optional) – permissions to be set.
  • receipt (PaymentReceipt) – The receipt for the payment made.
• Returns: The unique identifier of this update operation ID that can be used to help troubleshoot issues with this operation.
• Return type: str

Example

# Store
store_payment_receipt = ... # quote + pay for action
secrets = nillion.Secrets({"fortytwo": nillion.SecretInteger(42)})
store_id = await client.store_values(
  cluster_id, None, secrets, None, store_payment_receipt
)

update_payment_receipt = ... # quote + pay for action
# Update permissions
permissions = nillion.Permissions.default_for_user(client.user_id())
permissions.add_retrieve_permissions(set([args.retriever_user_id]))
updated_store_id = await client.update_permissions(args.cluster_id, store_id, permissions, update_payment_receipt)

print("Stored secret id: ", store_id)
print("Updated stored secret id: ", updated_store_id)

>>> Stored secret id: 3c504263-fd3f-40b8-8a1d-9056b7846637
>>> Updated stored secret id: ccdb8036-2635-40d9-9144-2cc89551fce9

update_values(cluster_id, store_id, values, receipt)

Update values already stored in the Nillion Network.

• Parameters:
  • cluster_id (str) – UUID of the targeted preprocessing cluster.
  • store_id (str) – The secret’s store ID (returned when calling store_values()).
  • values (Secrets) – The values to update; this is a hash map indexed by secret IDs.
  • receipt (PaymentReceipt) – The receipt for the payment made.
• Returns: The unique identifier of this update operation.
• Return type: str

Example

updated_secrets = nillion.Secrets({"fortytwo": nillion.SecretInteger(42)})
payment_receipt = ... # quote + pay
await client.update_values(
    args.cluster_id, store_id, update_values, payment_receipt
)

user_id

Returns SDK client’s user ID, which is the public user identifier.

The user ID is used to:

1. Generate a program ID (identification of a program in the Nillion Network). Check example in store_program();
2. Grant a user permission to use secrets. Check Permissions.

It is a hash generated from the public key of the user’s key-pair (UserKey). Not to be confused with the party_id() which is the generated from the public key of the node’s key-pair (NodeKey).

Read more about user ID in the Nillion Docs.

• Returns: Client’s user identifier.
• Return type: str

Example

print("Party ID:", client.user_id)

class py_nillion_client.NodeKey

This is a NodeKey class that contains a private key used by the underlying libp2p to form multiaddress and identity secrets. This class is consumed by NillionClient class to initialize a client.

This object’s constructors can be used via the following class methods:

1. From string encoded in Base58 (from_base58());
2. From a file (from_file());
3. From a seed (from_seed()).

Example

from py_nillion_client import NodeKey
node_key = NodeKey.from_seed('my_seed')

from_base58()

Decodes a private key from a string encoded in Base58.

• Parameters: contents (str) – A base58 string.
• Return type: NodeKey

Example

from py_nillion_client import NodeKey
node_key = NodeKey.from_base58()

from_file()

Loads a file containing a private key.

• Parameters: path (str) – The filesystem path to the file containing a base58 string.
• Return type: NodeKey

Example

from py_nillion_client import NodeKey
node_key = NodeKey.from_file('/path/to/nodekey.base58')

from_seed()

Generates a private key using a seed.

• Parameters: path (str) – A seed string.
• Return type: NodeKey

Example

from py_nillion_client import NodeKey
node_key = NodeKey.from_seed('my_seed')

class py_nillion_client.Operation

An operation that we want to run on the network.

compute(values)

Construct a new update values operation.

• Parameters:
  • program_id (str) – The identifier of the program to be invoked.
  • values (NadaValues) – The values to be stored.
• Return type: Operation

retrieve_permissions()

Construct a new retrieve permissions operation.

• Return type: Operation

retrieve_value()

Construct a new retrieve value operation.

• Return type: Operation

store_program()

Construct a new store program operation.

• Return type: Operation

store_values(ttl_days)

Construct a new store values operation.

• Parameters:
  • values (Secrets) – The values to be stored.
  • ttl_days (int) – The time to live for the values in days
• Return type: Operation

update_permissions()

Construct a new update permissions operation.

• Return type: Operation

update_values(ttl_days)

Construct a new update values operation.

• Parameters:
  • values (NadaValues) – The values to be stored.
  • ttl_days (int) – The time to live for the values in days.
• Return type: Operation

exception py_nillion_client.PaymentError

Payment-related errors: missing funds or other errors

args

with_traceback()

Exception.with_traceback(tb) – set self._traceback_ to tb and return self.

class py_nillion_client.PaymentReceipt(quote, transaction_hash)

A payment receipt.

Payment receipt are used to indicate that you made the payment for a price quote.

exception py_nillion_client.PermissionError

Missing permission errors

args

with_traceback()

Exception.with_traceback(tb) – set self._traceback_ to tb and return self.

class py_nillion_client.Permissions

This is a Permissions class used to manage permissions of stored secrets and compute. Permissions need to be set to allow users other than the secret creator to use the secret. This class is used either by NillionClient.store_values() or by NillionClient.update_permissions().

The default instantiation of this class is given by the method default_for_user().

Example

See examples on method request_price_quote().

add_compute_permissions(compute)

Add compute permissions to the Permissions instance for the user IDs provided.

• Parameters: compute (dict of set of str) – Dict keyed by the user_id of the targets where the value is a set of str specifying which program IDs to permit compute for.

Example

import py_nillion_client as nillion

program_id = client.user_id() + "/" + "program_name"
permissions = nillion.Permissions.default_for_user(client.user_id)
permissions.add_compute_permissions({
    args.compute_user_id: {program_id},
})

add_delete_permissions(delete)

Add delete permissions to the Permissions instance for the given set of user IDs

• Parameters: delete (set of str) – Desired targets to permit delete Secrets.

Example

import py_nillion_client as nillion

permissions = nillion.Permissions.default_for_user(client.user_id)
permissions.add_delete_permissions(set([args.delete_user_id]))

add_retrieve_permissions(retrieve)

Add retrieve permissions to the Permissions instance for the given set of user IDs.

• Parameters: retrieve (set of str) – Desired targets to permit read of stored programs or retrieve Secrets

Example

import py_nillion_client as nillion

permissions = nillion.Permissions.default_for_user(client.user_id)
permissions.add_retrieve_permissions(set([args.retriever_user_id]))

add_update_permissions(update)

Add update permissions to the Permissions instance for the given set of user IDs.

• Parameters: update (set of str) – Desired targets to permit update Secrets.

Example

import py_nillion_client as nillion

permissions = nillion.Permissions.default_for_user(client.user_id)
permissions.add_update_permissions(set([args.update_user_id]))

static default_for_user(user_id)

Returns the default permission set for the given user ID.

Note: this method can be used to clear/revoke permissions previously granted by the user.

• Parameters: user_id (str) – Desired target user ID.
• Return type: Permissions

Example

import py_nillion_client as nillion

permissions = nillion.Permissions.default_for_user(client.user_id)

is_compute_allowed(user_id, program)

Returns true if user has compute permissions for every single program.

• Return type: bool

Example

program_id = client.user_id() + "/" + "program_name"
compute_allowed = permissions.is_compute_allowed(user_client.user_id(), program_id)

is_delete_allowed(user_id)

Returns true if user has delete permissions.

• Return type: bool

Example

import py_nillion_client as nillion

permissions = nillion.Permissions.default_for_user(client.user_id)
delete_allowed = permissions.is_delete_allowed(user_client.user_id)
print("Default user is always allowed: ", delete_allowed)

>>> Default user is always allowed: True

is_retrieve_allowed(user_id)

Returns true if user has retrieve permissions.

• Return type: bool

Example

import py_nillion_client as nillion

permissions = nillion.Permissions.default_for_user(client.user_id)
retrieve_allowed = permissions.is_retrieve_allowed(user_client.user_id)
print("Default user is always allowed: ", retrieve_allowed)

>>> Default user is always allowed: True

is_retrieve_permissions_allowed(user_id)

Checks if user is allowed to retrieve the permissions.

• Return type: bool

Example

retrieve_permissions_allowed = permissions.is_retrieve_permissions_allowed(user_client.user_id())

is_update_allowed(user_id)

Returns true if user has update permissions.

• Return type: bool

Example

import py_nillion_client as nillion

permissions = nillion.Permissions.default_for_user(client.user_id)
update_allowed = permissions.is_update_allowed(user_client.user_id)
print("Default user is always allowed: ", update_allowed)

>>> Default user is always allowed: True

is_update_permissions_allowed(user_id)

Checks if user is allowed to update the permissions.

• Return type: bool

Example

update_permissions_allowed = permissions.is_update_permissions_allowed(user_client.user_id())

class py_nillion_client.PriceQuote

A price quote for an operation to be run in the network.

Quotes can be requested by using NillionClient.request_price_quote().

cost

Gets the cost for the quoted operation in unil units. The payment associated for the quoted operation must transfer the total amount for it to be considered a valid payment.

• Returns: The cost for this quote.
• Return type: OperationCost

Example

print("Total Cost:", quote.cost.total)

expires_at

Gets the expiration time for this quote in seconds since the unix epoch. The payment and the operation execution must be invoked before this deadline is hit, otherwise the network will reject the operation request.

• Returns: The expiration time for this quote.
• Return type: int

Example

print("Expiration time:", quote.expires_at)

nonce

Gets the nonce for this quote. This nonce must be used as part of the payment transaction.

• Return type: bytearray

Example

print("Nonce:", quote.nonce)

class py_nillion_client.ProgramBindings(program_id)

This is a ProgramBindings class used to bind compute parties to explicit peer IDs (provided by the NillionClient.party_id()). Bindings need to be set to use secrets in programs

This class is used by the NillionClient.store_values() and NillionClient.compute() methods.

• Parameters: program_id (str) – The identifier of the program to bind to.
• Returns: An instance of ProgramBindings.
• Return type: ProgramBindings

Example

import py_nillion_client as nillion

# program_id looks like: "/"
bindings = nillion.ProgramBindings(args.program_id)

# Add bindings when storing a secret
bindings.add_input_party("InputPartyName", client.party_id)
secrets = nillion.Secrets({"fortytwo": nillion.SecretInteger(42)})
store_id = await client.store_values(
    cluster_id, bindings, secrets, None
)

# Add bindings for compute action
bindings = nillion.ProgramBindings(args.program_id)
bindings.add_input_party("InputPartyName" client.party_id)
bindings.add_output_party("OutputPartyName", client.party_id)

add_input_party(name, id)

Bind an input party with a name to a specific program.

• Parameters:
  • name (str) – The logical name of the input party in the Nada program.
  • id (str) – The party identifier.

Example

bindings = nillion.ProgramBindings(args.program_id)
bindings.add_input_party("InputPartyName" client.party_id)

add_output_party(name, id)

Bind an output party with a name to a specific program.

• Parameters:
  • name (str) – The name of the output party in the Nada program.
  • id (str) – The party identifier.

Example

bindings = nillion.ProgramBindings(args.program_id)
bindings.add_output_party("OutputPartyName", client.party_id)

exception py_nillion_client.ProgramError

Program not found or invalid

args

with_traceback()

Exception.with_traceback(tb) – set self._traceback_ to tb and return self.

exception py_nillion_client.ResultError

Errors related to fetching computation results

args

with_traceback()

Exception.with_traceback(tb) – set self._traceback_ to tb and return self.

class py_nillion_client.SecretBlob(value)

This is a SecretBlob class used to encode a secret as a blob.

Note: __eq__ method is implemented to allow comparing two blobs.

• Parameters: value (bytearray) – Value of the secret blob as a bytearray.
• Returns: Instance of the SecretBlob class.
• Return type: SecretBlob
• Raises: VTypeError – argument ‘value’: Raises an error when a non-bytearray object is provided.

Example

import py_nillion_client as nillion

gm_blob_ba = bytearray("gm, builder!", "utf-8")
gm_blob = py_nillion_client.SecretBlob(gm_blob_ba)
ready_blob_ba = bytearray("ready to build!", "utf-8")
ready_blob = py_nillion_client.SecretBlob(ready_blob_ba)

print("Are these blobs the same?", gm_blob == ready_blob)

>>> Are these blobs the same?  False

value

Getter and setter for the value inside a SecretBlob instance.

• Returns: The value of the secret blob.
• Return type: int

Example

gm_blob_ba = bytearray("gm, builder!", "utf-8")
blob = nillion.SecretBlob(gm_blob_ba)
print("Blob is: ", blob.value)
ready_blob_ba = bytearray("ready to build!", "utf-8")
blob.value = ready_blob_ba
print("Blob is now: ", blob.value)

>>> Blob is:  bytearray(b'gm, builder!')
>>> Blob is now:  bytearray(b'ready to build!')

class py_nillion_client.SecretInteger(value)

This is a SecretInteger class used to encode a secret as a integer.

Note: __eq__ method is implemented to allow comparing two integers.

• Parameters: value (int) – Value of the secret encoded element.
• Returns: Instance of the SecretInteger class.
• Return type: SecretInteger

Example

import py_nillion_client as nillion

sec_integer_1 = nillion.SecretInteger(1)
sec_integer_2 = nillion.SecretInteger(2)

print("Are the secret integers the same? ", sec_integer_1 == sec_integer_2)

>>> Are the secret integers the same?  False

warning

Providing zero as SecretInteger leaks information.

value

Getter and setter for the value inside a SecretInteger instance.

• Returns: The value of the secret integer.
• Return type: int

Example

sec_integer = nillion.SecretInteger(1)
print("Secret integer is: ", sec_integer.value)
sec_integer.value = 2
print("Secret integer is now: ", sec_integer.value)

>>> Secret integer is:  1
>>> Secret integer is now:  2

class py_nillion_client.SecretUnsignedInteger(value)

This is a SecretUnsignedInteger class used to encode a secret as an unsigned integer.

Note: __eq__ method is implemented to allow comparing two unsigned integers.

• Parameters: value (int) – Value of the secret encoded element.
• Returns: Instance of the SecretUnsignedInteger class.
• Return type: SecretUnsignedInteger
• Raises: OverflowError – can’t convert negative int to unsigned: Raises an error when a negative integer value is used.

Example

import py_nillion_client as nillion

sec_uinteger_1 = nillion.SecretUnsignedInteger(1)
sec_uinteger_2 = nillion.SecretUnsignedInteger(2)

print("Are the secret unsigned integers the same? ", sec_uinteger_1 == sec_uinteger_2)

>>> Are the secret unsigned integers the same?  False

warning

Providing zero as SecretUnsignedInteger leaks information.

value

Getter and setter for the value inside a SecretUnsignedInteger instance.

• Returns: The value of the secret unsigned integer.
• Return type: int

Example

sec_uinteger = nillion.SecretUnsignedInteger(1)
print("Secret unsigned integer is: ", sec_uinteger.value)
sec_uinteger.value = 2
print("Secret unsigned integer is now: ", sec_uinteger.value)

>>> Secret unsigned integer is:  1
>>> Secret unsigned integer is now:  2

exception py_nillion_client.TimeoutError

Timed out

args

with_traceback()

Exception.with_traceback(tb) – set self._traceback_ to tb and return self.

class py_nillion_client.UnsignedInteger(value)

This is a UnsignedInteger class used to encode a public variable value as an unsigned integer.

Note: __eq__ method is implemented to allow to compare two unsigned integers.

• Parameters: value (int) – Value of the public encoded element.
• Returns: Instance of the UnsignedInteger class.
• Return type: UnsignedInteger
• Raises: OverflowError – can’t convert negative int to unsigned: Raises an error when a negative integer value is used.

Example

import py_nillion_client as nillion

pub_uinteger_1 = nillion.UnsignedInteger(1)
pub_uinteger_2 = nillion.UnsignedInteger(2)

print("Are the public unsigned integers the same? ", pub_uinteger_1 == pub_uinteger_2)

>>> Are the public unsigned integers the same?  False

value

Getter and setter for the value inside a UnsignedInteger instance.

• Returns: The value of the public unsigned integer.
• Return type: int

Example

pub_uinteger = nillion.UnsignedInteger(1)
print("Public unsigned integer is: ", pub_uinteger.value)
pub_uinteger.value = 2
print("Public unsigned integer is now: ", pub_uinteger.value)

>>> Public unsigned integer is:  1
>>> Public unsigned integer is now:  2

class py_nillion_client.UserKey

This is a UserKey class that contains the public and private keys for the user. This class is used by NillionClient class to initialize a client.

This object’s constructors can be used via the following class methods:

1. From string encoded in Base58 (from_base58());
2. From a file (from_file());
3. From scratch (generate());
4. From seed (seed()).

from_base58()

Loads public and private key from base 58 encoded data.

• Parameters: contents (str) – A base58 string.
• Return type: UserKey

Example

from py_nillion_client import UserKey
user_key = UserKey.from_base58()

from_file()

Loads public and private key from a file.

• Parameters: path (str) – The filesystem path to the file containing a base58 string.
• Return type: UserKey

Example

from py_nillion_client import UserKey
user_key = UserKey.from_file('/path/to/userkey.base58')

from_seed()

Generates a public and private key from a seed.

• Parameters: seed (str) – A seed string.
• Return type: UserKey

Example

from py_nillion_client import UserKey
user_key = UserKey.from_seed('my_seed')

generate()

Generates a random public and private key.

• Return type: UserKey

Example

from py_nillion_client import UserKey
user_key = UserKey.generate()

py_nillion_client.create_payments_message(quote: PriceQuote, payer_address: str)

Create a payments message.

• Parameters:
  • quote (PriceQuote) – The price quote for the operation being paid for.
  • sender_address (str) – The nilchain address of the payer.
• Returns: A protobuf message to be used when building a payments transaction.
• Return type: MsgPayFor

py_nillion_client.version()

Return the version of this SDK client.

• Returns: The version of this build.
• Return type: str

Example

py_nillion_client.version()