function cash(address _vault, bytes32[] calldata _burnProof) external {
    // Reverts if vault is not registered
    (address token, uint256 id) = _verifyVault(_vault);
    // Reverts if active listing has not been settled
    Listing storage activeListing = activeListings[_vault];
    // Reverts if listing has not been sold
    if (!_verifySale(_vault)) {
        revert NotSold();
    } else if (activeListing.collateral != 0) {
        uint256 collateral = activeListing.collateral;
        activeListing.collateral = 0;
        // Sets collateral amount to pending balances for withdrawal
        pendingBalances[_vault][activeListing.proposer] = collateral;
    }
	...
// Sets collateral amount to pending balances for withdrawal
pendingBalances[_vault][proposedListing.proposer] += proposedListing.collateral;
