Building Smart Contracts with Cudos Blockchains

Introduction:
Cudos Blockchains is a decentralized platform that provides a secure and scalable infrastructure for building and deploying blockchain-based applications. With Cudos Blockchains, developers can easily create smart contracts using the Solidity programming language and deploy them to a high-performance blockchain network.

In this article, we'll explore the process of building a simple smart contract using Solidity and deploying it to the Cudos blockchain.

Prerequisites

:
To follow along with this tutorial, you'll need to have the following:

A basic understanding of blockchain technology and smart contracts
A development environment set up for Solidity programming
A Cudos wallet and CLI tools installed
Getting Started:
To get started, create a new Solidity file and add the following code:

`// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;

contract MyContract {
    uint256 public myNumber;

    function setNumber(uint256 _number) public {
        myNumber = _number;
    }

    function doubleNumber() public {
        myNumber = myNumber * 2;
    }
}`

This is a simple smart contract that stores a number and provides two functions for modifying it. The setNumber function allows anyone to set the value of myNumber to any uint256 value they choose, and the doubleNumber function multiplies the current value of myNumber by 2.

Deploying to the Cudos Blockchain:

To deploy this contract to the Cudos blockchain, you'll need to compile it into a WebAssembly binary format and then use the Cudos CLI tools to store it on the blockchain. Here's an example command:

cudos-cli tx wasm store my_contract.wasm --from my_wallet_address

Replace my_contract.wasm with the filename of your compiled Solidity code, and my_wallet_address with the address of your Cudos wallet.

Interacting with the Smart Contract:

Once your contract is deployed, you can interact with it using the Cudos blockchain API. Here's an example of how to set the value of myNumber to 42:

cudos-cli tx wasm execute <contract_address> '{"setNumber": {"_number": 42}}' --from my_wallet_address

Replace with the address of your deployed contract, and my_wallet_address with the address of your Cudos wallet.

Conclusion:

In this tutorial, we've explored the process of building a simple smart contract using Solidity and deploying it to the Cudos blockchain. Cudos Blockchains provides an easy-to-use platform for developing and deploying blockchain-based applications, and with the power of smart contracts, developers can create decentralized applications that are secure, transparent, and highly scalable.

Links:

Cudos Blockchains documentation: https://docs.cudos.org/
Solidity programming language: https://docs.soliditylang.org/en/v0.8.7/
Cudos CLI tools: https://docs.cudos.org/developers/cli/