event TokensTraded()

This function fires an event after a token is successfully swapped

event TokensTraded()

Every trade on Bancor will emit this event with information on the trade itself.

event TokensTraded(
        bytes32 contextId,
        Token indexed pool,
        Token indexed sourceToken,
        Token indexed targetToken,
        uint256 sourceAmount,
        uint256 targetAmount,
        uint256 bntAmount,
        uint256 targetFeeAmount,
        uint256 bntFeeAmount,
        address trader
    );

Parameter Name	Type	Description
contextId	bytes32	Unique identifier for the specific transaction (can be used for grouping multiple events)
pool	Token	the address of the pool utilizing the trade
sourceToken	Token	The source token address
targetToken	Token	The target token address
sourceAmount	unit256	The amount of source tokens
targetAmount	unit256	The amount of target tokens
bntAmount	unit256	Amount of BNT tokens that were reallocated from sourceToken to targetToken trade liquidity
targetFeeAmount	unit256	The trading fee amount for target tokens
bntFeeAmount	unit256	The trading fee amount for BNT tokens
trader	address	The senders wallet address

Trades on the Bancor Network are represented by a single-hop in all cases. TokensTraded event tracks the key information. The sourceAmount is provided by the trader in exchange for the targetAmount (which already has the targetTokenFee subtracted from it).

Behind the scenes, the bntAmount is the BNT volume that facilitates the trade and has the bntFee subtracted from it.