refactor: revert when owner wrongly send ether while swap config is set for owner to be the receiver

[0xneves]

Refactor Request

Describe the Refactor Request

We should do a sanity check in case msg.value is bigger than 0 and recipient is different than 0. In this case, the user could wrongly send ether to the contract while configuring the ether receiver to be himself (0 = swap.allowed, 1<>255 = swap.owner).

    if (value > 0 && recipient == 0) {
      if (value * 1e12 != msg.value) revert InvalidValue();
    }

Big thanks to @blackbeard002 for pointing out this possibility.

Describe Preferred Solution

Assuming no ethers are being transferred, the value variable inside the config should always match 0. So there should also be a revert to trigger in this case.

• We should think of a way to revert in case msg.value differs from value but won't revert when they are both equals 0.
• msg.value should never be bigger than 0 when the recipient is different than 0. (meaning the swap.allowed will send the ether)

[blackbeard002]

Hey @0xneves can I take this up?

[0xneves]

Hey @0xneves can I take this up?

Yes you may!

[blackbeard002]

Hey @0xneves made a PR that closes this #230