t4sk / vyper-by-example

Learn Vyper by examples

vyper-by-example

Learn Vyper by examples

https://vyper.readthedocs.io/

Topics

• Intro
  • what is Vyper
  • how does it compare to Solidity
  • what are some projects using Vyper
  • Install vyper (optional)
  • Remix setup
  • Hello World
• types
  • value types
    • copy behaviour
    • initial values
  • reference types
    • array, mapping, structs
• function
  • visibility
  • mutability
  • multiple returns and tuple assignment
  • default
  • init
• state variables, public, private, shadowing, constant, env variables (self.balance, msg.sender, msg.value, block.timestamp, tx.origin)
• control flow
  • if, for loops (range, for a in array), break, continue, pass, return
• Assertions and exceptions - raise, assert
• event logging
• send / receive ether
• interfaces
  • declare
  • import
  • ERC20, ERC721
  • implements
  • extract interface
• reentrancy lock
• built in functions
  • create forwarder to
  • raw_call, delegate_call
  • raw_log
  • self destruct
  • send
  • keccak256
  • ecrecover
  • concat
  • sqrt
  • method_id
• natspec
• testing (frame work)

Install Vyper

# install virtualenv
python3 -m pip install --user virtualenv
virtualenv -p python3 venv
source venv/bin/activate

# install vyper
pip install vyper

Vyper

# compile
vyper myContract.vy

Local compile in Remix

# install
git clone https://github.com/jacqueswww/vyper-server.git
cd vyper-server

virtualenv -p python3 venv
source venv/bin/activate
pip install -r requirements.txt

# run server
source venv/bin/activate
python3 server.py

# deactivate venv
deactivate