Past Meetup

#75 [Beginner] Cryptocurrencies, Blockchains And Ethereum #5

This Meetup is past

17 people went

Tyro FintechHub

155 Clarence Street · Sydney

How to find us

Meet in the downstairs foyer before 5:30.

Location image of event venue


In the previous sessions we covered the following topics:
• Blockchain - Beginnings & History
• The Ethereum Blockchain - Networks, Clients & Wallets
• Addresses, Private and Public Keys
• Transactions
• Smart Contracts
• Tokens
• Dapps
• Crypto Safety

In this session we will be digging into:
• Transactions and
• Smart Contracts

We will be building an ERC20 token from scratch, using the interface defined at :
contract ERC20Interface {
function name() view returns (string name);
function symbol() view returns (string symbol);
function decimals() view returns (uint8 decimals);
function totalSupply() view returns (uint256 totalSupply);
function balanceOf(address _owner) view returns (uint256 balance);
function transfer(address _to, uint256 _value) returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
function approve(address _spender, uint256 _value) returns (bool success);
function allowance(address _owner, address _spender) view returns (uint256 remaining);
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);



Bring your laptop along, as there will be searching, reading and exercises to work on generally.

For anyone remote, you can dial in on between 17:15 and 21:00 Sydney time. BUT please message the organiser the day before to confirm the arrangement.

• Please don't share any of your confidential ideas as this is an open workshop
• The workshops are often recorded on video and audio, and may be published on the internet. By attending, you agree that you give your consent to be recorded
• There are open source and open community etiquettes you should abide by including attributing the source of works you build upon and not "stealing" another person's project/idea for commercial gains


Ropsten Testnet Ethers:
• You can transfer Ropsten Testnet ethers (RtETH) from my account 0xD8C2eEe8D6a390932Ca4fdC46aaE38a8056FeA4f ( using the private key `a19f68b6a1e08d7984b727451bf81991d6ae85c60310ca10e5b9a7a6a1ccb355` to unlock my account and transfer a few RtETH into your own Ropsten account
•• Don't mix up your Testnet account with your Mainnet account

• Meet 10 minutes before the start at 16:50, in the lobby of 155 Clarence Street, Sydney
• If arriving later, please ping the BokkyPooBah's Ethereum Workshop Chat ( group and someone will come down to get you
• Bring your hardware wallet (Ledger Nano S or Trezor) just in case you need to use it
• There will be some refreshments. Donations to cover expenses: $30 (those who can afford it), $20 (those who can almost afford it), $0 (those who really cannot afford it).
• The topic details for these workshops can change up to the last minute
• If you have successfully RSVPed or are on the waitlist, please review your RSVP status and cancel your RSVP/waitlist ASAP if you cannot make it to free up the spot for other people
• People from Tyro do not have to RSVP
• This workshop will be repeated to cater for the demand