RdpxV2Core::calculateBondCost() does not account for precission loss and allows users to bond an amount of 1, without providing any WETH.
Users can bond without 1 wei providing any WETH. This may break any assumptions regarding accountability of the Core contract, or may be combined with other issues to achieve a more critical one. This step may also be used in a for loop to increase the amount without providing WETH.
Add this test to tests/rdpxV2-core/Unit.t.sol and run forge test --mt "testBondNoEthCost":
Validate that the returned wethRequired of the calculateBondCost() is greater than 0.
