1. `grantDepositorRole()` to self;
2. `BribeVault#depositBribeERC20()` and transfer funds from victim's wallet;
3. `emergencyWithdrawERC20()`.
function depositBribeERC20(
    bytes32 bribeIdentifier,
    bytes32 rewardIdentifier,
    address token,
    uint256 amount,
    address briber
) external onlyRole(DEPOSITOR_ROLE) {
    require(bribeIdentifier.length > 0, "Invalid bribeIdentifier");
    require(rewardIdentifier.length > 0, "Invalid rewardIdentifier");
    require(token != address(0), "Invalid token");
    require(amount > 0, "Amount must be greater than 0");
    require(briber != address(0), "Invalid briber");

    Bribe storage b = bribes[bribeIdentifier];
    address currentToken = b.token;
    require(
        // If bribers want to bribe with a different token they need a new identifier
        currentToken == address(0) || currentToken == token,
        "Cannot change token"
    );

    // Since this method is called by a depositor contract, we must transfer from the account
    // that called the depositor contract - amount must be approved beforehand
    IERC20(token).safeTransferFrom(briber, address(this), amount);
    ...
function grantDepositorRole(address depositor)
    external
    onlyRole(DEFAULT_ADMIN_ROLE)
{
    require(depositor != address(0), "Invalid depositor");
    _grantRole(DEPOSITOR_ROLE, depositor);

    emit GrantDepositorRole(depositor);
}
