Investigate Web3 Fronted to Buy ITP Token

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• User needs to have wallet connected
• User selects ITP Token (Index) to Buy, enters amount of USDC to trade, and clicks "Finalise Transaction"
• Wallet asks to sign request, and user agrees to sign

Option A. Collateral comes from Base/Arbitrum chain

• Request contains IERC20Permit (Permit20) and is sent to Backend service
• Backend service will call Custody contract on Base or Arbitrum chain via chain RPC to execute Permit20 and draw cash from user's wallet
• Backend service will call "Place Order" on Daxos contract

Option B. Initial transaction happens already on our Orbit chain

• User deposits USDC to Vault contract (all on our Orbit chain), and this activity starts "Place Order" flow

Note In neither of the two cases we route collateral any further than our custody contract whether OTCCustody or Vault. Instead Supplier (AP) would later request collateral routing from custody, and perhaps on-chain Delta vector would be a proof.

TBD Find out how to handle bridging USDC to our Orbit chain, and then how to trigger smart-contract on deposit, or whether Permit20 should be used.