Getting started with smart contracts on Ethereum Blockchain.

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Contract 01

Smart contract with specific for contracts getters like:

• Returning sender/contract addresses,
• Returning sender/contract balances.

Contract 02

Smart contract organizing ether lottery where contract owner decides when to pick the winner.

• User has to pay some ethers to join the game,
• No user limit,
• Contract owner decides when lottery draws the winner.

Contract 03

Smart contract organizing fundraising the goal selected on creating contract.

• Fundraising has set goal to reach,
• Fundraising is time limited,
• When fundraising reached the goal owner can withdraw money,
• When time is up without hitting the goal, donators can withdraw their money back.

Contract 04

Own implementation ERC20 token based on the EIP specification

Contract 05

Smart contract which implements string converter with tests.

• Using Assembly block with functions.

Contract 06

Smart contract storing struct data with tests.

• Only owner can add new data,
• Included Solidity and JavaScript tests.

Contract 07

Smart contract with roles, permissions management with tests.

• Creates manager modifier,
• Owner can view and manage managers.

Contract 08

Smart contract which is downloading LPG price from public json source using Oraclize API.

Contract 09

Smart contract getting true random number using Oraclize API.

Contract 10

Smart contract organizing candidate election with tests.

• Storing structs of candidates,
• Contract owner gives allowance to vote for specific addresses (voters),
• Each voter can vote only once and cannot vote on himself.

Contract 11

tic-tac-toe implementation.

• basic implementation for 2 players using 3x3 board.

Additional files:

Tests folder containing tests for:

• Contract 05
• Contract 06
• Contract 07
• Contract 10