Events

Events

LOG_CALL is an anonymous event which uses the function signature as the event signature. It is fired by all stateful functions. The following applies to Balancer Core pools. Smart Pools have similar events and modifiers.

event LOG_CALL(
    bytes4  indexed sig,
    address indexed caller,
    bytes           data
) anonymous;

LOG_SWAP is fired (along with LOG_CALL) for all swap variants.

event LOG_SWAP(
    address indexed caller,
    address indexed tokenIn,
    address indexed tokenOut,
    uint256         tokenAmountIn,
    uint256         tokenAmountOut
);

LOG_JOIN and LOG_EXIT are fired for each individual token join / exit

event LOG_JOIN(
    address indexed caller,
    address indexed tokenIn,
    uint256         tokenAmountIn
);

event LOG_EXIT(
    address indexed caller,
    address indexed tokenOut,
    uint256         tokenAmountOut
);

Mutex

All stateful functions use either a lock or viewlock function modifier. A mutex places a lock on contract state and prevents any sort of re-entrancy.

modifier _lock_() {
    require(!_mutex, "ERR_REENTRY");
    _mutex = true;
    _;
    _mutex = false;
}

modifier _viewlock_() {
    require(!_mutex, "ERR_REENTRY");
    _;
}