Design pattern for a trustless ICO?

Support Contracts
1

Hi, I’m trying to launch a token via ICO that is trustless. Is there a design pattern to do the following:

  • I launch ICO contract
  • Investors send ETH to ICO contract
  • ICO contract query chainlink price oracle for ETH and saves USD value associated with investor address
  • Payout function that gives me the investor ETH automatically launches an ERC-20 token with rules established by a library contract and distributes the tokens proportionally to the USD value provided by the investors?
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