soma-sdk 0.1.3

Python SDK for the Soma network

soma-sdk

Python SDK for interacting with the Soma network. Built with PyO3 and Maturin, providing native-speed bindings to the Rust SDK.

Install

pip install soma-sdk

Or with uv:

uv add soma-sdk

Requires Python ≥ 3.10.

Quick Start

import asyncio
from soma_sdk import SomaClient, WalletContext

async def main():
    # Connect to a Soma node
    client = await SomaClient("http://localhost:9000")

    # Query chain info
    chain_id = await client.get_chain_identifier()
    version = await client.get_server_version()
    print(f"Chain: {chain_id}, Version: {version}")

    # Check a balance (returns shannons; 1 SOMA = 1_000_000_000 shannons)
    balance = await client.get_balance("0xADDRESS")
    print(f"Balance: {balance} shannons")

asyncio.run(main())

Classes

SomaClient

Read-only client for querying chain state and submitting pre-signed transactions via gRPC.

client = await SomaClient("http://localhost:9000")

Chain & Node Info

Method	Returns	Description
get_chain_identifier()	str	Chain identifier string
get_server_version()	str	Server version string
get_protocol_version()	int	Current protocol version
check_api_version()	None	Raises if client/server versions mismatch

Objects & State

Method	Returns	Description
get_object(object_id)	str (JSON)	Get object by hex ID
get_object_with_version(object_id, version)	str (JSON)	Get object at a specific version
get_balance(address)	int	Balance in shannons
get_latest_system_state()	str (JSON)	Current global system state
get_epoch(epoch=None)	str (JSON)	Epoch info (None for latest)
list_owned_objects(owner, object_type=None, limit=None)	list[str] (JSON)	Objects owned by an address

object_type can be: "coin", "staked_soma", "target", "submission", "challenge", "system_state".

Targets & Challenges

Method	Returns	Description
list_targets(status=None, epoch=None, limit=None)	str (JSON)	List targets with optional filters
get_challenge(challenge_id)	str (JSON)	Get challenge by ID
list_challenges(target_id=None, status=None, epoch=None, limit=None)	str (JSON)	List challenges with optional filters

Checkpoints

Method	Returns	Description
get_latest_checkpoint()	str (JSON)	Latest checkpoint summary
get_checkpoint_summary(sequence_number)	str (JSON)	Checkpoint by sequence number

Transactions

Method	Returns	Description
execute_transaction(tx_bytes)	str (JSON)	Execute a signed transaction (BCS bytes)
simulate_transaction(tx_data_bytes)	str (JSON)	Simulate unsigned transaction data (BCS bytes)
get_transaction(digest)	str (JSON)	Get transaction effects by digest

---

WalletContext

Manages keys, builds transactions, signs, and executes. Wraps a local wallet config file (e.g. ~/.soma/client.yaml).

wallet = WalletContext("/path/to/client.yaml")

Key Management

Method	Returns	Description
get_addresses()	list[str]	All managed addresses
active_address()	str	Currently active address
has_addresses()	bool	Whether any addresses exist
get_gas_objects(address)	list[str] (JSON)	Gas coin objects for an address
save_config()	None	Persist wallet config to disk

Signing & Execution

Method	Returns	Description
sign_transaction(tx_data_bytes)	bytes	Sign BCS TransactionData, returns BCS Transaction
sign_and_execute_transaction(tx_data_bytes)	str (JSON)	Sign, execute, and wait for checkpoint inclusion. Panics on failure.
sign_and_execute_transaction_may_fail(tx_data_bytes)	str (JSON)	Same as above but returns effects even on failure

Transaction Builders

All builders return bytes (BCS-encoded TransactionData). Pass the result to sign_transaction or sign_and_execute_transaction.

The gas parameter is always optional — when None, a gas coin is auto-selected from the sender's owned coins. When provided, it must be a dict with {"id": str, "version": int, "digest": str}.

Coin & Object Transfers

# Transfer a coin (optionally a partial amount)
tx = await wallet.build_transfer_coin(sender, recipient, coin, amount=None, gas=None)

# Transfer arbitrary objects
tx = await wallet.build_transfer_objects(sender, recipient, [obj1, obj2], gas=None)

# Multi-recipient payment
tx = await wallet.build_pay_coins(sender, recipients, amounts, coins, gas=None)

Staking

# Stake with a validator
tx = await wallet.build_add_stake(sender, validator, coin, amount=None, gas=None)

# Withdraw stake
tx = await wallet.build_withdraw_stake(sender, staked_soma, gas=None)

# Stake with a model
tx = await wallet.build_add_stake_to_model(sender, model_id, coin, amount=None, gas=None)

Model Management

# Register a model (commit-reveal pattern)
tx = await wallet.build_commit_model(
    sender, model_id,
    weights_url_commitment,    # 32-byte hex
    weights_commitment,        # 32-byte hex
    architecture_version,      # int
    stake_amount,              # int (shannons)
    commission_rate,           # int (BPS, 10000 = 100%)
    staking_pool_id,           # hex object ID
    gas=None,
)

# Reveal model weights (must be called the epoch after commit)
tx = await wallet.build_reveal_model(
    sender, model_id,
    weights_url,               # URL string
    weights_checksum,          # 32-byte hex
    weights_size,              # int (bytes)
    decryption_key,            # 32-byte hex
    embedding,                 # list[float] — model embedding vector
    gas=None,
)

# Update model weights (commit-reveal)
tx = await wallet.build_commit_model_update(sender, model_id, weights_url_commitment, weights_commitment, gas=None)
tx = await wallet.build_reveal_model_update(sender, model_id, weights_url, weights_checksum, weights_size, decryption_key, embedding, gas=None)

# Other model operations
tx = await wallet.build_deactivate_model(sender, model_id, gas=None)
tx = await wallet.build_set_model_commission_rate(sender, model_id, new_rate, gas=None)
tx = await wallet.build_report_model(sender, model_id, gas=None)
tx = await wallet.build_undo_report_model(sender, model_id, gas=None)

Mining Submissions

# Submit data to fill a target
tx = await wallet.build_submit_data(
    sender,
    target_id,
    data_commitment,           # 32-byte hex
    data_url,                  # URL string
    data_checksum,             # 32-byte hex
    data_size,                 # int (bytes)
    model_id,                  # hex object ID
    embedding,                 # list[float]
    distance_score,            # float
    bond_coin,                 # {"id", "version", "digest"} dict
    gas=None,
)

# Claim rewards from a filled/expired target
tx = await wallet.build_claim_rewards(sender, target_id, gas=None)

# Report/undo-report a fraudulent submission
tx = await wallet.build_report_submission(sender, target_id, challenger=None, gas=None)
tx = await wallet.build_undo_report_submission(sender, target_id, gas=None)

Challenges

# Initiate a challenge against a filled target
tx = await wallet.build_initiate_challenge(sender, target_id, bond_coin, gas=None)

# Validator reports that challenger is wrong
tx = await wallet.build_report_challenge(sender, challenge_id, gas=None)
tx = await wallet.build_undo_report_challenge(sender, challenge_id, gas=None)

# Resolve and claim challenge bond
tx = await wallet.build_claim_challenge_bond(sender, challenge_id, gas=None)

Validator Management

tx = await wallet.build_add_validator(sender, pubkey_bytes, network_pubkey_bytes, worker_pubkey_bytes, net_address, p2p_address, primary_address, proxy_address, gas=None)
tx = await wallet.build_remove_validator(sender, pubkey_bytes, gas=None)
tx = await wallet.build_update_validator_metadata(sender, gas=None, next_epoch_network_address=None, ...)
tx = await wallet.build_set_commission_rate(sender, new_rate, gas=None)
tx = await wallet.build_report_validator(sender, reportee, gas=None)
tx = await wallet.build_undo_report_validator(sender, reportee, gas=None)

End-to-End Example

import asyncio
import json
from soma_sdk import SomaClient, WalletContext

async def transfer_soma():
    client = await SomaClient("http://localhost:9000")
    wallet = WalletContext("~/.soma/client.yaml")

    sender = await wallet.active_address()

    # Find a gas coin
    gas_objects = await wallet.get_gas_objects(sender)
    coin = json.loads(gas_objects[0])

    # Build, sign, and execute
    tx_bytes = await wallet.build_transfer_coin(
        sender=sender,
        recipient="0xRECIPIENT",
        coin=coin,
        amount=1_000_000_000,  # 1 SOMA
    )
    effects_json = await wallet.sign_and_execute_transaction(tx_bytes)
    print(json.loads(effects_json))

asyncio.run(transfer_soma())

Building from Source

Requires Rust and Python ≥ 3.10.

# Install maturin
pip install maturin

# Development build (editable install)
cd python-sdk
maturin develop

# Release build
maturin build --release

License

Apache-2.0