Event Bot Monitoring

What is Event Bot Monitoring?

An event refers to an event in a smart contract, triggered when a certain transaction occurs. Users can track these events to trace transactions.

Event Monitoring listens for specific behaviors on-chain by monitoring events emitted by smart contracts.

Typical Scenarios for Event Bot Monitoring

1. Defi Liquidity Event Monitoring

   1. Defi liquidity exceeds a set threshold.

   2. Defi liquidity falls below a set threshold.

2. NFT Mint Event Monitoring

   1. A specific NFT starts minting.

3. Token Mint Event Monitoring

   1. Large token unlock monitoring.

4. Others, etc.

Supported Data Sources

Data Source	Type	Stability
Ethereum	on chain	Very High
BSC	on chain	High
Avalanche	on chain	High
Polygon Pos	on chain	High
Arbitrum	on chain	High
Optimism	on chain	High
Polygon zkEVM	on chain	High
ZkSync Era	on chain	High
Base	on chain	High
Scroll	on chain	High
Manta	on chain	High
ZKFair	on chain	High
Blast	on chain	High
Linea	on chain	High
B2	on chain	High
Merlin	on chain	High

How to Configure Event Bot Monitoring?

After logging in to the ChainBot platform, select "Create Bot" in the upper right corner -> "Event Monitor".

Chosen Event Monitor

⚠️ Note

When a specific Event is selected, Conditions will automatically parse the fields contained in that Event, limited to the Event's fields. Therefore, Event and Conditions have a corresponding relationship.

Info Description

Field Name	Description	Required
Name	Monitoring Bot Name	Yes
Chain	Selected Chain	Yes
Contract	Selected Contract	Yes
Event	Selected Event	Yes
Tags	Bot monitoring tags, beneficial for search	Yes

Conditions Description

Conditions in Event Monitoring dynamically change based on the selected Event.

For example, when monitoring the Approval event in the USDT contract, as the parameters of Event Approval(owner: address, spender: address, value: uint256) are three, the available fields in conditions are also three, namely owner, spender, value. Configure your parameters based on your conditions to achieve your purpose.

Template Variables Description

Variable	Description	Example
$alert.time	Block in which the event occurred	16073651
$tx.hash	Transaction hash generating the event	transaction hash
$event.contract	Contract address where the event occurred	16073651
$event.params.{abc}	Key fields parsed from the event	$event.params.tokens
$chain.explore	Current chain explorer prefix	https://etherscan.io/

Default Notification Template

[ {$bot.name} ]
Contract: {$event.contract}
Time: {$alert.time}
Explore: {$chain.explore}/tx/{$tx.hash}

Learn about alarm notification templates?

Notification Message Example

[ CRV Liquidation Call Monitor ] Contract: 0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9 Amount: 187743.2161384799 CRV Time: 2022-11-23T02:09:23+08:00 Explore: https://etherscan.io/tx/0x47ffc7939cf8deed6a28357934f98402892b370ac2d3be0c6576f733f6d97b1e Created By ChainBot.io

Event Bot Monitoring Case Study

Event Bot Example