Background – 出身背景区块链毕设代写

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Background

Your company has decided to crowdsale their PupperCoin token in order to help fund the network development. This network will be used to track the dog breeding activity across the globe in a decentralized way, and allow humans to track the genetic trail of their pets. You have already worked with the necessary legal bodies and have the green light on creating a crowdsale open to the public. However, you are required to enable refunds if the crowdsale is successful and the goal is met, and you are only allowed to raise a maximum of 300 Ether. The crowdsale will run for 24 weeks.

You will need to create an ERC20 token that will be minted through a Crowdsale contract that you can leverage from the OpenZeppelin Solidity library.

This crowdsale contract will manage the entire process, allowing users to send ETH and get back PUP (PupperCoin). This contract will mint the tokens automatically and distribute them to buyers in one transaction.

It will need to inherit Crowdsale, CappedCrowdsale, TimedCrowdsale, RefundableCrowdsale, and MintedCrowdsale.

Conducting crowdsale on the Kovan network

Screenshots of steps in the process

Background - 出身背景 Background - 出身背景 Background - 出身背景 Background - 出身背景 Background - 出身背景


背景

贵公司已决定众售其PupperCoin代币,以帮助为网络开发提供资金。该网络将用于以分散的方式跟踪全球的犬类繁殖活动,并允许人类跟踪其宠物的基因轨迹。您已经与必要的法律机构合作,并为创建面向公众的众筹开了绿灯。但是,如果众筹成功并且达到了目标,您需要启用退款,并且您最多只能筹集300英镑。众筹将持续24周

您需要创建一个ERC20代币,该代币将通过众售合同铸造,您可以从OpenZeppelin Solidity库中利用该代币

此众筹合同将管理整个过程,允许用户发送ETH并取回PUP(PupperCoin)。该合同将自动铸造代币,并在一次交易中将其分配给买家

它需要继承众售、封顶众售、TimedCrowdsale、可退款众售和MintedCrowdsale

在科万网络上进行众售

过程中步骤的屏幕截图

背景

过程中步骤的屏幕截图

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