The main objective of this thesis is the implementation of a smart contract with a lottery theme over a blockchain network. The first part is purely theoretical and deals with basic information about smart contracts, together with blockchain technology, which ensures decentralization and credibility of contracts. It explains the important operating principles and characteristics of smart contracts, such as speed, efficiency, cost reduction and transparency. There are also various examples of sma... zobrazit celý abstraktThe main objective of this thesis is the implementation of a smart contract with a lottery theme over a blockchain network. The first part is purely theoretical and deals with basic information about smart contracts, together with blockchain technology, which ensures decentralization and credibility of contracts. It explains the important operating principles and characteristics of smart contracts, such as speed, efficiency, cost reduction and transparency. There are also various examples of smart contract applications that we may already encounter. The thesis also provides a brief description of the lottery environment, at the general level at first and then examines lottery games through the optics of cryptocurrencies. The main part of this thesis is the implementation of a smart contract. Here, the proposed functionality is first presented, on which the logic of a smart contract is based. This is the entry point for the actual implementation of the program code on the Ethereum blockchain using the Solidity language. In this section, the code is thoroughly explained and commented on. Furthermore, the smart contract is published and tested, first through Unit tests and then through system tests. These consist of individual test cases, which first examine the correctness of the defined restrictions and then the overall functionality that allows the operation of the lottery game. |