simpleEscrow.vyp

# Escrow Smart Contract

# Events
event Deposit(address indexed sender, uint value)
event Refund(address indexed sender, uint value)
event Release(address indexed sender, address indexed receiver, uint value)

# Variables
address public owner
address public escrow
address public seller
address public buyer
uint public amount
bool public locked

# Modifiers
modifier onlyOwner { require(msg.sender == owner); _; }
modifier onlyEscrow { require(msg.sender == escrow); _; }

# Constructor
def __init__():
    owner = msg.sender

# Deposit
@onlyOwner
def setEscrow(address _escrow):
    escrow = _escrow

@onlyEscrow
def deposit(address _seller, address _buyer, uint _amount):
    require(!locked)
    seller = _seller
    buyer = _buyer
    amount = _amount
    locked = true
    emit Deposit(seller, amount)

# Refund
@onlyEscrow
def refund():
    require(locked)
    locked = false
    emit Refund(seller, amount)

# Release
@onlyEscrow
def release():
    require(locked)
    locked = false
    emit Release(seller, buyer, amount)