mirror of
https://github.com/sharkdp/bat.git
synced 2024-12-02 04:33:34 +01:00
90 lines
2.8 KiB
Plaintext
90 lines
2.8 KiB
Plaintext
|
# IndividuallyCappedCrowdsale
|
||
|
|
# Contributors: Binod Nirvan
|
||
|
|
# This file is released under Apache 2.0 license.
|
||
|
|
# @dev Crowdsale with a limit for total contributions.
|
||
|
|
# Ported from Open Zeppelin
|
||
|
|
# https://github.com/OpenZeppelin
|
||
|
|
#
|
||
|
|
# See https://github.com/OpenZeppelin
|
||
|
|
# Open Zeppelin tests ported: Crowdsale.test.js
|
||
|
|
|
||
|
|
|
||
|
|
#@dev ERC20/223 Features referenced by this contract
|
||
|
|
contract TokenContract:
|
||
|
|
def transfer(_to: address, _value: uint256) -> bool: modifying
|
||
|
|
|
||
|
|
# Event for token purchase logging
|
||
|
|
# @param _purchaser who paid for the tokens
|
||
|
|
# @param _beneficiary who got the tokens
|
||
|
|
# @param _value weis paid for purchase
|
||
|
|
# @param _amount amount of tokens purchased
|
||
|
|
TokenPurchase: event({_purchaser: indexed(address), _beneficiary: indexed(address), _value: uint256(wei), _amount: uint256})
|
||
|
|
|
||
|
|
# The token being sold
|
||
|
|
token: public(address)
|
||
|
|
|
||
|
|
#Address where funds are collected
|
||
|
|
wallet: public(address)
|
||
|
|
|
||
|
|
# How many token units a buyer gets per wei.
|
||
|
|
# The rate is the conversion between wei and the smallest and indivisible token unit.
|
||
|
|
# So, if you are using a rate of 1 with a DetailedERC20 token with 3 decimals called TOK
|
||
|
|
# 1 wei will give you 1 unit, or 0.001 TOK.
|
||
|
|
rate: public(uint256)
|
||
|
|
|
||
|
|
#Amount of wei raised
|
||
|
|
weiRaised: public(uint256(wei))
|
||
|
|
|
||
|
|
@public
|
||
|
|
def __init__(_rate: uint256, _wallet: address, _token: address):
|
||
|
|
"""
|
||
|
|
@dev Initializes this contract
|
||
|
|
@param _rate Number of token units a buyer gets per wei
|
||
|
|
@param _wallet Address where collected funds will be forwarded to
|
||
|
|
@param _token Address of the token being sold
|
||
|
|
"""
|
||
|
|
|
||
|
|
assert _rate > 0, "Invalid value supplied for the parameter \"_rate\"."
|
||
|
|
assert _wallet != ZERO_ADDRESS, "Invalid wallet address."
|
||
|
|
assert _token != ZERO_ADDRESS, "Invalid token address."
|
||
|
|
|
||
|
|
self.rate = _rate
|
||
|
|
self.wallet = _wallet
|
||
|
|
self.token = _token
|
||
|
|
|
||
|
|
@private
|
||
|
|
@constant
|
||
|
|
def getTokenAmount(_weiAmount: uint256) -> uint256:
|
||
|
|
return _weiAmount * self.rate
|
||
|
|
|
||
|
|
|
||
|
|
@private
|
||
|
|
def processTransaction(_sender: address, _beneficiary: address, _weiAmount: uint256(wei)):
|
||
|
|
#pre validate
|
||
|
|
assert _beneficiary != ZERO_ADDRESS, "Invalid address."
|
||
|
|
assert _weiAmount != 0, "Invalid amount received."
|
||
|
|
|
||
|
|
#calculate the number of tokens for the Ether contribution.
|
||
|
|
tokens: uint256 = self.getTokenAmount(as_unitless_number(_weiAmount))
|
||
|
|
|
||
|
|
self.weiRaised += _weiAmount
|
||
|
|
|
||
|
|
#process purchase
|
||
|
|
assert TokenContract(self.token).transfer(_beneficiary, tokens), "Could not forward funds due to an unknown error."
|
||
|
|
log.TokenPurchase(_sender, _beneficiary, _weiAmount, tokens)
|
||
|
|
|
||
|
|
#forward funds to the receiving wallet address.
|
||
|
|
send(self.wallet, _weiAmount)
|
||
|
|
|
||
|
|
#post validate
|
||
|
|
|
||
|
|
@public
|
||
|
|
@payable
|
||
|
|
def buyTokens(_beneficiary: address):
|
||
|
|
self.processTransaction(msg.sender, _beneficiary, msg.value)
|
||
|
|
|
||
|
|
@public
|
||
|
|
@payable
|
||
|
|
def __default__():
|
||
|
|
self.processTransaction(msg.sender, msg.sender, msg.value)
|