API and CLI for Soroban contracts in Python

This package provide tools to interact with Soroban contracts in Python. The goal is to provide a simple feature set while not depending on the Rust SDK. This can be useful in environment where Rust and the SDK might be more difficult to get working (like a Raspberry Pi).

Getting started

pip install soroban

This provides a simple way to call contracts without needing to install the Rust SDK and is a higher level interface compared to using the Python SDK.

import soroban

soroban.invoke(contract_id="AAAA...", function_name="increment")

Identity and Network configurations are automatically pulled from the local configuration or the current working directory. See bellow.

It also provides a CLI

soroban invoke C... version --source-account=...

Usage

The main feature is to be able to call a Soroban contract function: soroban.invoke.

import soroban

soroban.invoke(contract_id="AAAA...", function_name="increment")

It also supports passing arguments as a list of stellar_sdk.SCVal. This list can be easily generated

import json
import soroban

args = json.load(...)
args = soroban.Parameters(args=args)
soroban.invoke(contract_id="AAAA...", function_name="init", args=args)

The following JSON syntax is supported. Note that vectors are also supported:

[
  {
    "name": "issuer",
    "type": "address",
    "value": "C..."
  },
  {
    "name": "distributor",
    "type": "int128",
    "value": 10
  },
  {
    "name": "claimants",
    "type": "vec",
    "value": [
      {
        "type": "uint32",
        "value": 12
      },
      {
        "type": "int64",
        "value": 20
      }
    ]
  }
]

A few helper functions are also provided:

• soroban.create_account: create and fund an account from a source account;
• soroban.create_asset: create an asset using the classical issuer/distributor model.

Configuration

The source account and the network to use are set by instantiating soroban.Identity and soroban.NetworkConfig, respectively:

import soroban

identity = soroban.Identity()
network = soroban.NetworkConfig()

In both cases, the configuration can be set by either adjusting init arguments, setting up environment variables or using configuration files in toml.

The default path for soroban.Identity is identity.toml and for soroban.NetworkConfig it is testnet.toml. Here are examples of these files:

secret_key = "S..."

horizon_url = "https://horizon-testnet.stellar.org"
rpc_url = "https://soroban-testnet.stellar.org"
network_passphrase = "Test SDF Network ; September 2015"

Any of these fields can be set as an environment variable.

Acknowledgements

This repository has no affiliation with the Stellar Developer Foundation. The official CLI can be found here https://github.com/stellar/soroban-cli Should this become useful, I am happy to transfer it as well to the SDF org!