Ad

How does it work?

This contract will give you access to set an ad on https://kiwinews.xyz. The ad will be, for example, permanently available as the top fourth link here:

At the time of writing, we reach roughly 150-400 individuals in the crypto space a day. But we have no idea how much it'd be worth to advertise to these people, hence the smart contract. It'll help us do price discovery. So how does it work?

Basically, you can stake an amount of ETH for the contract to be yours. Say you stake 1 ETH, then you'll get to set the title, link, and you'll own the contract. But over 1 month, we'll charge you 1 ETH in fees (100% of the collateral a month). The ETH staked as collateral in the contract is also the price someone has to pay to acquire the ad from you. Here's an example:

• Day 0: You stake 1 ETH in collateral. The price to transfer the ad is 1 ETH.
• Day 15 (half a month): Now half of your collateral was taxed (0.5 ETH). The price to transfer the ad is 0.5 ETH. Your remaining collateral is 0.5 ETH.
• Day 30 (month): Your ad is about to be taken off the website. In case noone has bought yet, your collateral now is very low 0.0000...1 ETH, and so for someone else to buy the ad space from you is extremely cheap.

Now, what would happen if someone bought your ad for 0.9 ETH on Day 12? The new flow would be:

1. You deposit 1 ETH on Kiwi as collateral
2. On day 12, there are 0.6 ETH left (the rest, 0.4 ETH, is locked for taxes)
3. Alice wants to buy the new ad for 0.9 ETH. What happens then:
   • 0.6 ETH from Alice are sent to you
   • 0.3 ETH from Alice are kept as collateral for the new ad
   • 0.4 ETH from your old collateral are sent to Kiwi for the taxes
   • 0.6 ETH from your old collateral are sent back to you

Now:

• You have 1.2 ETH (0.6 ETH leftover collateral + 0.6 ETH from Alice)
• Alice has 0.3 ETH as collateral on Kiwi
• Kiwi has 0.4 ETH paid from taxes from your ad

You may have heard of this concept earlier. It's often referred to as Harberger taxes, or Partial common ownership. Check out this talk from Devcon SEA about "Demand-based recurring fees in practice" to learn more.

How to buy the ad?

Go to https://news.kiwistand.com/submit and check "Submit as an ad."

Deployment

CREATE2 is used to deploy the contract to a deterministic address independent of chainId.

• DEPLOYER: 0x0000000000ffe8b47b3e2130213b802212439497
• SALT: 0x0000000000000000000000000000000000000000f00df00df00df00df00df00d
• INITCODE: 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
• ADDRESS: 0xffcc6b6c5c066b23992758a4fc408f09d6cc4eda
• Deployed to:
  • Optimism

Updates and verifying on Etherscan

ETHERSCAN_API_KEY=abc forge verify-contract address Ad --watch --chain 10

License

SPDX-License-Identifier: AGPL-3.0