BuidlGuidl.eth
@buidlguidl
Building products, tools, and tutorials for the Ethereum ecosystem.
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加入 November 2021
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Challenge 1: Crowdfunding.
The exercise:
• Write a campaign contract with a goal and a deadline
• Funders pay in, the contract holds ETH
• On success: creator withdraws
• On failure: funders get a refund
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