Points hook

• Simple on chain reward program

• launching a memecoin - "TOKEN"

• setup a pool with ETH/TOKEN

  • issue points for every time somebody buys TOKEN with ETH
  • issue points for everytime somebody adds liquidity to the pool

THIS IS NOT PRODUCTION READY. If we have time we'll discuss about limitations and how to fix them

How many poins to give out?

• 20% of value in ETH. if alice sells 1 ETH to buy TOKEN, it will receive 0.2 points.
• For adding liquidity , we'll keep 1:1 for ETH added

Mechanism design

1. issue points evertime somebody buy TOKEN for ETH

• afterSwap : the amount of ETH can be only known after swap has happened
• issue points proportional to amount of ETH being sent from user for swap

2. issue points everytime somebody add liquidity

• afterAddLiquidity

BalanceDelta

• Represents changes in the balance of token0 and token1
• BalanceDelta = (amount0Delta amount1Delta)
• Alice sells 1 ETH for TOKEN in our pool after swap is done
• BalanceDelta = (-1 ETH, +500 TOKEN)

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• whenever there is a balance change , all number in uniswap by convention are represented from user perspective
• amount0Delta = -1 ETH => user needs to send 1 ETH to uniswap (user owes 1 ETH)
• amount1Delta = 500 token => User is owed 500 tokens from uniswap (uniswap needs to send 500 tokens to user)

zeroForOne

• exactInput(...) : zero for one
• exactInput(...) : one for zero
• exactOutput(...) : zero for one
• exactOutput(...) : one for zero