Add Starknet Compatibility to ZKP2P (Rewrite in Cairo)

[jommi9]

Blurb about ZKP2P

ZKP2P is the first trustless peer-to-peer (P2P) fiat to crypto onramp and offramp powered by ZK. Initially, we are integrated permissionlessly with

• Venmo, a popular payment platform in the US to onramp USD to USDC.
• HDFC, a popular bank in India to onramp INR to USDC.

This can be extended to any payment platform in any country and any cryptoasset.

The underlying technology leverages Zero-Knowledge Proofs (ZK proofs) to settle transactions in our decentralized escrow service. ZKP2P uses ZK proofs to verify DKIM signatures in payment confirmation emails. This technology allows for permissionless integration with any web2 payment network while preserving the privacy of transaction details. Users can post off-ramp orders to our on-chain smart contract which operates as a community bulletin board that on-rampers can use to find a matching user for their on-ramp transaction.

The idea would be to rewrite ramp and verification contracts in Cairo:
https://docs.zkp2p.xyz/zkp2p/developer/smart-contracts

Then, the zkp2p platform could also support on and offramping to Starknet and other future Starknet-based chains.