signing_contracts.rs

enum Contract {
    /// Promise to sign a valid request within the `time_guarantee`
    Promised{promise: Promise, time_guarantee: u64, sol_to_eth: u64},
    /// Request has been made, the Promisee need's to sign before `expires`
    Requested{promise: Promise, valid_request: Request, expires: u64},
    /// Request has been signed
    Signed(Vec<u8>),
    /// Request has expired
    Expired,
}

enum Promise {
    /// from address, and maximum value to spend including gas
    Ethereum{from: H160, max_value: U256},
}

enum Request {
    /// to address and value and gas
    Ethereum{to: H160, nonce: U256, value: U256, gas_price: U256, gas_limit: U256},
}


impl Promise {
    fn is_valid_request(&self, request: Request) -> bool {
    }
    fn is_valid_signature(&self, signed: Vec<u8>) -> bool {
    }
    fn is_expired(&self, time: u64) -> bool {
    }
}