DEV Community: Supernova

interact with the Soroban smart contract and start betting on the outcome of events using Ethereum

Supernova — Fri, 17 Mar 2023 18:45:30 +0000

Soroban-CLI is a command-line interface (CLI) tool for interacting with the Soroban smart contract. The Soroban smart contract is a decentralized application (dApp) built on the Ethereum blockchain that allows users to bet on the outcome of events using cryptocurrency.

Here is a beginner's tutorial on how to interact with the Soroban smart contract using the Soroban-CLI tool:

Install Soroban-CLI: You can install Soroban-CLI using npm (Node Package Manager) by running the following command in your terminal:
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npm install -g soroban-cli

Set up your Ethereum wallet: Before you can interact with the Soroban smart contract, you need to set up your Ethereum wallet. You can use any Ethereum wallet that supports the ERC-20 token standard, such as MetaMask or MyEtherWallet.

Connect to the Ethereum network: Once you have set up your Ethereum wallet, you need to connect to the Ethereum network. You can do this by running the following command in your terminal:

perl
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soroban-cli network connect

This will prompt you to select your Ethereum wallet and connect it to the Ethereum network.

Check your balance: You can check your Ethereum balance by running the following command in your terminal:
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soroban-cli balance
This will display your current Ethereum balance.

Place a bet: You can place a bet on the outcome of an event using the Soroban smart contract by running the following command in your terminal:

soroban-cli bet <event> <outcome> <amount>

Replace with the name of the event, with the outcome you want to bet on, and with the amount of Ethereum you want to bet. For example, if you want to bet 1 Ethereum on the outcome "heads" for the event "coin flip", you would run the following command:

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soroban-cli bet coinflip heads 1

View your bets: You can view your current bets by running the following command in your terminal:
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soroban-cli bets

This will display a list of all your current bets, including the event name, the outcome you bet on, the amount of Ethereum you bet, and the current status of the bet.

Withdraw your winnings: If your bet is successful, you can withdraw your winnings by running the following command in your terminal:
php

soroban-cli withdraw <betId>
Replace <betId>

with the ID of the bet you want to withdraw your winnings from. You can find the bet ID by running the soroban-cli bets command. For example, if the bet ID is 1234, you would run the following command to withdraw your winnings:

yaml
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soroban-cli withdraw 1234

That's it! With these simple steps, you can interact with the Soroban smart contract and start betting on the outcome of events using Ethereum.

To deploy and invoke a Soroban smart contract using Soroban Python SDK, you can follow the steps below

Supernova — Wed, 08 Mar 2023 00:01:27 +0000

Install the Soroban Python SDK:

pip install soroban-sdk

Import the necessary modules:

from soroban_sdk import Soroban, Account
Create a Soroban instance:

soroban = Soroban('https://api.soroban.co/', 'my-api-key')
Note: Replace 'my-api-key' with your actual Soroban API key.

Create an Account instance:

account = Account.from_private_key('my-private-key')
Note: Replace 'my-private-key' with your actual private key.

Define the smart contract code:
python

contract_code = """
pragma solidity ^0.8.0;

contract MyContract {
    uint256 public value;

    function setValue(uint256 _value) public {
        value = _value;
    }
}

"""
Note: This is just an example contract code. You should replace it with your actual smart contract code.

Compile the smart contract code:
makefile

compiled_contract = soroban.compile_contract(contract_code)
Deploy the smart contract:
css

deployed_contract = soroban.deploy_contract(compiled_contract['bytecode'], account)
Get the contract address:
css

contract_address = deployed_contract['contractAddress']

Invoke a function in the smart contract:
makefile

function_name = 'setValue'
function_args = [42]
soroban.invoke_contract_function(contract_address, function_name, function_args, account)

Note: Replace 'setValue' with the name of the function you want to call, and [42] with the arguments you want to pass to the function.

Step-by-Step Guide for Beginners: How to Set Up the Soroban Python SDK on Windows

Supernova — Mon, 06 Mar 2023 15:18:14 +0000

Setting up the Stellar Python SDK on Windows involves several steps, including installing Python, setting up a virtual environment, and installing the SDK. Here are the detailed steps:

Install Python:
Go to the Python website (https://www.python.org/downloads/windows/) and download the latest version of Python for Windows.
Run the installer and follow the instructions to install Python on your computer.
Install Git:
Go to the Git website (https://git-scm.com/download/win) and download the latest version of Git for Windows.
Run the installer and follow the instructions to install Git on your computer.
Open Command Prompt:
Press the Windows key + R, then type cmd and press Enter.
Alternatively, open the Start menu, type Command Prompt, and click on the Command Prompt app.

Install virtualenv

In the Command Prompt, type the following command and press Enter:
Python.org
Python Releases for Windows
The official home of the Python Programming Language
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pip install virtualenv

Create a virtual environment:
Navigate to the directory where you want to create the virtual environment. For example, if you want to create it in the Documents folder, type the following command and press Enter:
cd Documents
Create the virtual environment by typing the following command and pressing Enter:

virtualenv stellar_env

This will create a new directory called "stellar_env" that contains the virtual environment.
Activate the virtual environment:
Type the following command and press Enter:

stellar_env\Scripts\activate

You should see the name of the virtual environment appear in parentheses in the Command Prompt.
Install the Stellar Python SDK:
Type the following command and press Enter:

pip install stellar-sdk

This will install the SDK and any necessary dependencies.
Test the installation:
Type the following command and press Enter:
python
This will open the Python interpreter.
Type the following commands and press Enter after each one:

from stellar_sdk import Server
server = Server("https://horizon-testnet.stellar.org/%22)
print(server.fetch_base_fee())

You should see the current base fee on the Stellar network printed to the screen.
Congratulations! You have successfully set up the Stellar Python SDK on Windows.